diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..38d0f2e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+*.swp
+*.vvp
+*.vcd
+*.raw
+__pycache__
+**/.DS_Store
+**/.Trashes/
+
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..02000c3
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,81 @@
+#---------------------------------------------------
+# Makefile for efabless project open_pdks
+# Tim Edwards, 11/21/2016
+# Updated 10/19/2018 for use independently of the
+# efabless /ef/ tree filesystem setup.
+# Updated 5/5/2020 for use with the 2-stage install
+#---------------------------------------------------
+#
+# Typical usage:
+#
+# make
+# 	generates the tech files from source masters.
+#
+# make install-local
+#
+# 	installs the tech files locally.
+#
+# make install-dist
+#
+# 	installs the tech files in the git project
+# 	that is used for distribution of software
+# 	across the system.
+#
+# make clean
+#
+# 	clean up all files generated by 'make'
+# 
+#---------------------------------------------------
+#
+# The following definitions are tied to the contents
+# of this repository and should not be changed.
+
+TECHS       = sky130
+
+#---------------------------------------------------
+
+all:	${TECHS}
+	for tech in ${TECHS}; do \
+		${MAKE} tech_$$tech; done
+
+#---------------------------------------------------
+
+tech_sky130:
+	(cd sky130 && ${MAKE} all)
+
+#---------------------------------------------------
+
+install-sky130-local:	sky130
+	(cd sky130 && ${MAKE} install-local)
+
+install-sky130-dist:	sky130
+	(cd sky130 && ${MAKE} install-dist)
+
+clean-sky130:
+	(cd sky130 && ${MAKE} clean)
+
+veryclean-sky130:
+	(cd sky130 && ${MAKE} veryclean)
+
+#---------------------------------------------------
+
+install:
+	${MAKE} install-local
+
+install-local:	${TECHS}	
+	for tech in ${TECHS}; do \
+		${MAKE} install-$${tech}-local; done
+
+install-dist:	${TECHS}
+	for tech in ${TECHS}; do \
+		${MAKE} install-$${tech}-dist; done
+
+#---------------------------------------------------
+
+clean:
+	for tech in ${TECHS}; do \
+		${MAKE} clean-$${tech}; done
+
+veryclean:
+	for tech in ${TECHS}; do \
+		${MAKE} veryclean-$${tech}; done
diff --git a/README b/README
new file mode 100644
index 0000000..24fc238
--- /dev/null
+++ b/README
@@ -0,0 +1,574 @@
+open_pdks : A system for installing silicon foundry PDKs for open-source EDA tools
+(also maybe works for installing commercial tools)
+
+----------------------------------------------------------------------------------
+
+Written by Tim Edwards 2019 / 2020 for efabless (efabless.com)
+and Open Circuit Design (opencircuitdesign.com)
+
+----------------------------------------------------------------------------------
+
+Introduction:
+
+    Silicon foundry PDKs are notoriously non-standard, and files obtained
+    from the foundry may end up in any possibly configuration of files and
+    folders.  In addition, silicon foundries are notorious among open source
+    EDA tool enthusiasts for supplying user setups for commercial EDA tools
+    and all but ignoring open source EDA tools.  Open_pdks aims to mitigate
+    the problem by defining a standard layout of files and directories for
+    known open standard formats (e.g., SPICE, verilog, liberty, LEF, etc.)
+    and for various open source EDA tools (e.g., magic, netgen, OpenROAD,
+    klayout) using a Makefile system and a number of conversion scripts to
+    ensure that for any process, all files needed by all EDA tools can be
+    found in predictable locations.
+
+    The scripts aim to be as general-purpose as possible to allow easy
+    adaptation to new tools, formats, and foundries.  Where foundry data
+    is intractably unusable, custom install files can be added to overwrite
+    or annotate vendor data as needed.
+
+    Each foundry process is a subdirectory of the open_pdks top level and
+    has its own Makefile.  The typical install process is to cd to the
+    foundry top level and run "make" (see below for details).
+    
+    The general file structure created by open_pdks is as follows:
+
+	<foundry_root>/
+	    <name_of_pdk_variant_1>/
+	    <name_of_pdk_variant_2>/
+	    ...
+	    <name_of_pdk_variant_x>/
+		libs.tech/
+		    <name_of_EDA_tool_1>/
+		    <name_of_EDA_tool_2>/
+		    ...
+		    <name_of_EDA_tool_x>/
+			<EDA_tool_setup_files>
+		libs.ref
+		    <name_of_IP_library_1>/
+		    <name_of_IP_library_2>/
+		    ...
+		    <name_of_IP_library_x>/
+			<name_of_file_format_1>
+			<name_of_file_format_2>
+			...
+			<name_of_file_format_x>
+			    <vendor_files>
+			
+    Note that this format is very general and does not constrain the
+    EDA tools supported or file formats supported, so long as there
+    are scripts in the system to provide that support.  It is intended
+    that open_pdks can be extended as needed to support new tools or
+    new file formats.
+
+    Current EDA tools supported in this version of open_pdks:
+	Tool	    Directory name
+	--------------------------
+	ngspice	    ngspice
+	magic	    magic
+	netgen	    netgen
+	klayout	    klayout
+	qflow	    qflow
+	openlane    openlane
+		
+    Current IP library file formats supported in this version of open_pdks*:
+	Format	    Directory name
+	--------------------------
+	CDL	    cdl
+	SPICE	    spice
+	magic	    mag, maglef
+	LEF	    lef, techlef
+	GDS	    gds
+	verilog	    verilog
+	liberty	    lib
+	PDF**	    doc
+
+	(* "Supported" meaning expected/handled by conversion scripts;
+	   as noted, the install is very general purpose and any name
+	   can be used as a target for any vendor or custom files.)
+	(** or HTML or any valid document format, plus supporting files.)
+
+How to use open_pdks:
+
+    There are a seriously limited number of open foundry PDKs.  Those that
+    are known (SkyWater, MOSIS SCMOS) are included in the repository.  In
+    other cases (X-Fab XH035, XH018) it is possible to get an extension to
+    open_pdks from a known trusted source through NDA verification with
+    the foundry.  In all other cases, foundries should be berated until
+    they agree to support the open_pdks format.
+
+    Open_pdks does not attempt to keep any foundry data to the extent
+    possible.  Instead, it adapts to the file structure available from
+    whatever system each foundry uses for downloads.  Each foundry
+    directory should contain a README file that details how to obtain
+    downloads from the foundry, and what files need to be downloaded.
+    Since the download methods vary wildly, it is up to the user to obtain
+    the foundry data as instructed.  The Makefile in the open_pdks foundry
+    directory then needs to be edited to set the correct path to the
+    foundry source data.
+
+    The installation is a bootstrapping process, so needs to be done in
+    stages.  The first stage installs setup files for all the EDA tools.
+    The second stage installs IP libraries (e.g., standard cells, padframe
+    I/O, analog circuits) and depends heavily on the use of the open EDA
+    tools themselves to fill in any missing file formats.  Therefore the
+    tool setup files need to be installed first, and then the IP libraries.
+    If using a distributed install (see below), then the tool setup files
+    need to be installed and distributed (relocated to the final run-time
+    location) before the IP libraries are installed.
+
+    There are two distinct install types supported by open_pdks:
+
+    (1) Local install:  Use a local install when the EDA tools will be run
+    on a single host, and all the PDK data are on the same host.
+
+    The local install sequence is:
+
+	make				Generate local staging area
+	make install-local		Migrate to install directory
+
+    (2) Distributed install:  Use the distributed install when the PDK
+    will be run from multiple hosts, but will be installed into a
+    different location such as a git repo which is then distributed to
+    all hosts, and may not itself reside in the same root directory tree.
+
+    The distributed install sequence is:
+
+	make				Generate local staging area
+	make install-dist		Migrate to distribution directory
+
+    Note that local installs may opt to make symbolic links back to the
+    foundry sources, where possible (see options for foundry_install.py,
+    below).  Distributed installs and local installs may also make
+    symbolic links from any PDK variant back to a "master" PDK variant,
+    where possible (that is, where the files are the same).  For example,
+    a standard cell library will probably be compatible with all metal
+    back-end stacks, and so only one copy of all the library files is
+    needed in one of the PDK variants.  For the other PDK variants, the
+    same files are all symbolic links to the files in the first PDK
+    variant.  But an I/O library would have different layouts for different
+    metal back-end stacks, so layout-dependent files like GDS would be
+    different for each PDK, but layout-independent files like verilog
+    might be symbolic links to files in the first PDK.
+
+Prerequisites:
+
+    The following tools/software stacks are needed to run open_pdks:
+
+	python3
+
+	magic	opencircuitdesign.com/magic or github.com/RTimothyEdwards
+
+		assumed to be installed and discoverable in the standard
+		search path as defined by the shell (version 8.2+ required)
+
+How to make or update an open PDK:
+
+    The backbone of the open_pdks system is a set of scripts found in the
+    common/ subdirectory.  The two main scripts are "preproc.py" and
+    "foundry_install.py", with a host of supporting scripts.
+
+    Creating a new PDK starts with generating a Makefile, which can be
+    done by copying a Makefile from an existing project.  The first thing
+    to do is to define the number of PDK variants (usually based on back-end
+    metal stacks available, but can also include front-end options, especially
+    if they are mutually exclusive rather than simply additional masks).
+    Then create the make and make-install targets for local and distributed
+    install, including install (plain), install-vendor, and install-custom.
+    Define the default source and target paths.
+
+    (Needed:  A "make makefile" script that generates the "local" and "dist"
+    automatically, and potentially can also make all the different PDK
+    targets automatically, from a much shorter and simpler master Makefile.)
+
+    Create the basic scripts for tools.  Since foundries do not support open
+    EDA tools, it is inevitable that these files need to be created by hand
+    unless there is an option to import other formats.  Because Magic is used
+    heavily by open_pdks to create missing file formats from other existing
+    file formats, a Magic techfile is critical.  Each of the basic scripts
+    will contain #ifdef ... #endif and similar conditionals to allow the
+    script to be parsed for each target PDK variant.  Each of these scripts
+    is passed through common/preproc.py to handle the conditionals.  Of course,
+    it is possible to make a separate file for each PDK variant as long as the
+    Makefile handles them properly, but use of the preproc.py script allows
+    all the PDK variants to be handled in the same way, simplifying the Makefile.
+
+    --------------------------------------------------------------------------
+    preproc.py Usage:
+
+        preproc.py input_file [output_file] [-D<variable> ...]
+ 
+	  Where <variable> may be a keyword or a key=value pair
+ 
+	  Syntax:  Basically like cpp.  However, this preprocessor handles
+	  only a limited set of keywords, so it does not otherwise mangle
+	  the file in the belief that it must be C code.  Handling of boolean
+	  relations is important, so these are thoroughly defined (see below)
+ 
+	        #if defined(<variable>) [...]
+	        #ifdef <variable>
+	        #ifndef <variable>
+	        #elseif <variable>
+	        #else
+	        #endif
+ 
+	        #define <variable> [...]
+	        #undef <variable>
+ 
+	        #include <filename>
+ 
+	  <variable> may be
+	        <keyword>
+	        <keyword>=<value>
+ 
+	        <keyword> without '=' is effectively the same as <keyword>=1
+	        Lack of a keyword is equivalent to <keyword>=0, in a conditional.
+ 
+	  Boolean operators (in order of precedence):
+	        !       NOT
+	        &&      AND
+	        ||      OR
+ 
+	  Comments:
+	        Most comments (C-like or Tcl-like) are output as-is.  A
+	        line beginning with "###" is treated as a preprocessor
+	        comment and is not copied to the output.
+ 
+	  Examples;
+	        #if defined(X) || defined(Y)
+	        #else
+	        #if defined(Z)
+	        #endif
+
+    --------------------------------------------------------------------------
+
+    The script common/foundry_install.py handles all the IP library processing
+    and installation.  It generates the local directory structure and populates
+    the directories with foundry vendor data, and filters or otherwise uses
+    open EDA tools to generate missing standard file formats or create file
+    formats needed by the open EDA tools.
+
+    foundry_install.py Usage:
+
+	foundry_install.py [option [option_arguments]] ...
+
+	All options begin with "-" and may be followed by one or more
+	arguments (that do not begin with "-").  The foundry_install.py
+	script may be called multiple times, although it is best to
+	group together all files for the installation of an IP library,
+	since the options given will be used to determine what files are
+	missing and need to be generated.
+
+	Global options:
+	    -link_from <type>  
+			    Make symbolic links to vendor files from target
+			    Types are: "none", "source", or a PDK name.
+			    Default "none" (copy all files from source)
+	    -source <path>
+			    Path to source data top level directory
+	    -target <path>
+			    Path to target top level directory
+	    -local <path>
+			    For distributed installs, this is the local
+	                    path to target top level directory.
+
+	    -library <type> <name>
+			    The install target is an IP library with
+			    name <name>.
+	    -ef_format
+			    Use the original efabless format for file
+			    installs.  This has several differences from
+			    then no-efabless install.  The most important
+			    is that the order of directories for IP libraries
+			    is <file_format>/<library_name> instead of
+			    <library_name>/<file_format>.  As the efabless
+			    platform migrates to the open_pdks developing
+			    standard, this use should eventually be
+			    deprecated.  In open_pdks, the option is set
+			    from the EF_FORMAT variable setting in the Makefile.
+
+	 All other options represent installation into specific directories.
+	 The primary rule is that if foundry_install.py is passed an option
+	 "-library" (see syntax below), then all other non-global options
+	 represent subdirectories of the IP library, given the same name as
+	 the option word following the "-".  If the foundry_install.py command
+	 line does not have an option "-library", then all non-global options
+	 represent per-EDA tool subdirectories, where the name of the subdirectory
+	 is the same as the option word following the "-".
+
+	 Each tool install option has the syntax:
+
+		-<tool_name> <path> [<option_arguments>]
+
+	 Each IP library install option has the syntax:
+
+		-<file_format_name> <path> [<option_arguments>]
+	
+	 The <path> is a directory path that is relative to the path prefix
+	 given by the -source option.  The path may be wildcarded with the
+	 escape string "%l", which is replaced by the name of the library,
+	 and for simplicity with versioning, "%v" will be interpreted to
+	 match any versioning string in the form "major[.minor[.rev]]".
+	 Note that only the numerical part of a versioning string is
+	 represented, so, for example, to match "/V1.1.0/" the <path> should
+	 use "/V%v/".  In the unlikely event of a percent character in the
+	 path, use the escape string "%%".
+
+	 "*" has the usual meaning of matching any characters in a name (see
+	 python glob.glob() command for reference).  However, for backwards
+	 compatibility with earlier versions of open_pdks, the library name
+         in the path may also be wildcarded with "*" in the specific text
+	 "/*/".
+
+	 Library name wildcarding in either form is only valid if "-library"
+	 is given as an an option.
+
+	 (Note that the INSTALL variable in the Makefile starts with "set -f"
+	 to suppress the OS from doing wildcard substitution;  otherwise the
+	 wildcards in the install options will get expanded by the OS before
+	 being passed to the install script.)
+
+	 Library option:
+	
+	       -library <type> <name> [<target>]
+	
+	    <type> may be one of the following:
+
+		digital		Digital standard cells
+		primitive	Primitive devices
+		general		All others
+
+		Analog and I/O libraries fall under the category "general".
+
+	    <name> is the vendor name of the library.
+
+	    [<target>] is the (optional) local name of the library.  If omitted,
+	    then the vendor name is used for the target (there is no particular
+	    reason to specify a different local name for a library).
+
+	 Any number of libraries may be supported, and one "-library" option
+	 may be provided for each supported library.  The use of multiple
+	 libraries for a single run of foundry_install.py only works if the
+	 formats (gds, cdl, lef, etc.) happen to all work with the same wildcards.
+	 But it is generally most common to declare only one library name per
+	 call to foundry_install.py.
+	
+	 Common foundry_install.py options when used with "-library":
+	
+	       -techlef <path> [option_arguments]   Technology LEF file
+	       -doc <path> [option_arguments]	    library documentation
+	       -lef <path> [option_arguments]	    LEF file
+	       -spice <path> [option_arguments]	    SPICE netlists
+	       -cdl <path> [option_arguments]	    CDL netlists
+	       -lib <path> [option_arguments]	    Liberty timing files
+	       -gds <path> [option_arguments]	    GDS layout data
+	       -verilog <path> [option_arguments]   Verilog models
+
+	 Any name can be used after the "-" and the installation of files
+	 will be made into a directory of that name, which will be created
+	 if it does not exist.  The names used above are preferred, for
+	 the sake of compatibility between EDA tools.
+
+	 Of special note is "techlef", as technology LEF files are often
+	 associated with a PDK and not an IP library.  In this system,
+	 the technology LEF file should be associated with each standard
+	 cell library for which it is intended.
+
+	 [option_arguments] may be one of the following:
+
+	       up  <number>
+		    Any tool option can use this argument to indicate that
+		    the source hierarchy should be copied entirely, starting
+		    from <number> levels above the files indicated by <path>.
+		    For example, if liberty files are kept in multiple
+		    directories according to voltage level, then
+	
+			-liberty x/y/z/PVT_*/*.lib
+	
+		    would install all .lib files directly into
+		    libs.ref/<libname>/liberty/*.lib while
+	
+			-liberty x/y/z/PVT_*/*.lib up 1
+	
+		    would install all .lib files into
+		    libs.ref/liberty/<libname>/PVT_*/*.lib.
+	
+	       nospec
+	            Remove timing specification before installing (used with
+		    verilog files only;  could be extended to liberty files).
+
+	       compile
+	            Create a single library from all components.  Used when a
+		    foundry library has inconveniently split an IP library
+		    (LEF, CDL, verilog, etc.) into individual files.
+
+	       compile-only
+		    Same as argument "compile", except that the individual
+		    files are not copied to the target;  only the compiled
+		    library is created.
+
+	       stub
+	            Remove contents of subcircuits from CDL and SPICE netlist,
+		    or verilog files.  This is useful to LVS and other tools
+		    to know the order of pins in a circuit (for CDL or SPICE),
+		    or simply to ignore the contents of the file (any format)
+		    so that the circuit in question is treated as a "black box".
+
+	       priv
+	            Mark the contents being installed as privleged, and put
+		    them in a separate root directory libs.priv where they
+		    can be given additional read/write restrictions.
+
+	       rename <file_name>
+		    Rename the file being copied to the name of the argument.
+		    This can be used to copy one file into multiple destination
+		    libraries and give each copy a name related to the
+		    destination library.
+
+	       filter <script_file_path>
+		    Process all files through the script <script_file_path>,
+		    which is given as a relative path to the directory
+		    containing the Makefile.  The filter script traditionally
+		    is put in local subdirectory custom/scripts/.  The filter
+		    script should be written to take a single argument, which
+		    is the path to a file, and process that file, and overwrite
+		    the file with the result.  Commonly used filters are found
+		    in the common/ directory.  See common/fixspice.py for an
+		    example.
+
+	       noclobber
+		    Mainly diagnostic.  When specified, any temporary files
+		    used during installation will be retained instead of
+		    deleted after use.  This includes, for example, scripts
+		    passed to magic for running extraction or file format
+		    generation.  It is useful when debugging problems with
+		    the install.
+
+	       anno
+		    Currently only supported for LEF files.  This argument
+		    indicates that the vendor LEF files should be used only
+		    for annotating GDS input with port location information,
+		    but the LEF files themselves should not be installed.
+
+    File conversions handled by foundry_install.py:
+
+	The following file format conversions can be done automatically by
+	foundry_install.py:
+
+	    CDL to SPICE:  A CDL netlist or library can be converted to a
+			   general-purpose SPICE netlist that can be read
+			   by any tool that can read Berkeley SPICE 3f5
+			   syntax.
+
+	    GDS to LEF:	   An abstract view can be generated from a full
+			   layout view using Magic.
+
+	    GDS to SPICE:  In the absence of any netlist, Magic will
+			   extract a SPICE netlist from a full layout.
+
+	    SPICE (any) to SPICE (ngspice):  The fixspice.py script will
+			   attempt to convert any SPICE model file,
+			   cell library, or netlist to a form that is
+			   compatible with ngspice version 30.
+
+    open_pdks additional Makefile notes:
+
+	The "make install-local" ("make install-dist") step is generally
+	broken into individual make sections, one for each tool (e.g.,
+	magic, netgen, klayout).  There is an additional section called
+	"general" which installs a ".config" directory at the PDK top
+	level, containing a file "nodeinfo.json" which has general
+	information about the PDK that may be used by any tool that
+	understands the key:value pairs used in the JSON file.  Keys used
+	are as follows:
+
+		foundry :	Short name of the foundry, equal to the foundry
+				directory root, above the PDK variants.
+		foundry-name :  Long name of the foundry.
+		node :		The name of the PDK variant
+		feature-size :  The foundry process feature size (e.g., 130nm)
+		status :	"active" or "inactive".  May be used by tools
+				to present or hide specific PDK variants.
+		description :	Long text description of the process variant
+				(e.g., 6-metal stack + MiM caps)
+		options :	List of options, corresponding to the definitions
+				used in the Makefile and passed to preproc.py.
+		stdcells :	List of standard cell libraries available for this
+				PDK variant.
+		iocells :	List of I/O pad cell libraries available for this
+				PDK variant.
+
+	Note that the JSON file is, like other EDA tool setup files, usually a
+	master file that is parsed by preproc.py;  therefore when specifying
+	"options", use #undef before specifying each option name so that the
+	option name itself is ignored by the pre-processor.
+	
+
+Goals of the open_pdks project:
+
+    The intended goal of open_pdks is to be able to support as many open source
+    EDA tools as practical, and to be able to generate all needed files for
+    those tools from any sufficiently complete set of vendor files.
+
+    A number of file converions are not available but would be useful to have:
+
+	    SPICE to liberty:   Create timing files by running simulations
+				on SPICE netlists using ngspice.
+
+	    liberty to verilog: Use the function statements in liberty
+				format to create verilog primitives.  Maybe
+				use liberty timing information to generate
+				LEF specify sections.
+
+	    verilog to liberty: Reverse of the above.  Use verilog logic
+				tables and specify sections to generate liberty
+				functions and timing tables.
+
+    File formats that need to be supported:
+
+	    Schematic and symbol:  There are few standards, so either everyone
+				needs to agree on a good format to use, or there
+				needs to be a lot of scripts to do conversions
+				between formats.  Open EDA tools that could be
+				supported include:
+
+				electric, xcircuit, kicad, sue2
+
+    Other open source EDA tools that need to be supported:
+
+	    OpenROAD
+	    Coriolis2
+	    (add more here. . .)
+
+    Commercial EDA tools can potentially be supported under this same system,
+    provided sufficient compatibility with the file system structure.
+
+    Other scripts needed:
+
+	    Project setup script:  It would be useful to define a "standard
+	    project file structure" that is similar to the standard PDK file
+	    structure defined in open_pdks.  The preferred project setup
+	    based on the efabless model is:
+
+		<project_name>
+		    .config/
+			techdir (symbolic link to open_pdks PDK)
+		    project.json    (information file for tools)
+		    <tool_name>	    (magic, qflow, ngspice, etc.) or
+		    <format_name>   (spice, gds, verilog, etc.)
+
+	    In general, <tool_name> directories are intended to be workspaces
+	    for specific EDA tools (and may have their own nested hierarchies;
+	    e.g., qflow/<digital_block>/source,synthesis,layout) while
+	    <format_name> is a place to keep (final) files of a specific format,
+	    with the intention that any project can easily be made into an
+	    IP library and folded into the open_pdks scheme with little effort.
+
+	    The project.json file contains project information that can be used
+	    by a script to build a setup for any EDA tool.  One goal of the
+	    project.json file is to define "datasheet" (documented elsewhere)
+	    that can be used to drive characterization simulations and create
+	    a datasheet for the project.  Field "ip-name" of "datasheet" is
+	    the canonical name of the project, which can be distinguished from
+	    the project directory top-level name, such that the project can be
+	    moved or copied without affecting the tool flows.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..12651e0
--- /dev/null
+++ b/README.md
@@ -0,0 +1,37 @@
+Open-PDKs (open_pdks)
+-----------------------------------------
+
+Summary:
+
+Automatic setup of PDKs for open-source tools from foundry sources.
+
+Builds out and populates a new set of directories and subdirectories in
+the efabless format, with the efabless name for the PDK at the top,
+followed by categories "libs.ref" (IP) and "libs.tech" (EDA tool setup),
+each with subcategories corresponding to layout, abstract views,
+netlists, etc. for the IP;  and magic, netgen, qflow, etc., for the
+EDA tool setup.
+
+The populated PDK directories can contain either copies of files from
+the foundry sources, links to the foundry sources, or links back to
+another PDK.
+
+Generates magic layout views for all vendor IP for which either a GDS
+view or a LEF view exists.  Annotates the views as needed to handle
+ports, bounding boxes, etc.
+
+-----------------------------------------
+
+This distribution contains sources for building out the SkyWater s8
+130nm process.  Sources for the foundry process data must be obtained
+separately.  Read the README file in subdirectory s8/ for instructions
+on obtaining and building the SkyWater s8 PDK.
+
+-----------------------------------------
+
+Instructions:
+
+There is a top-level Makefile but generally it is recommended to cd
+to the directory for the target foundry process and follow the instructions
+in the README file there.
+
diff --git a/common/README b/common/README
new file mode 100644
index 0000000..decfec1
--- /dev/null
+++ b/common/README
@@ -0,0 +1,584 @@
+open_pdks : A system for installing silicon foundry PDKs for open-source EDA tools
+(also maybe works for installing commercial tools)
+
+----------------------------------------------------------------------------------
+
+Written by Tim Edwards 2019 / 2020 for efabless (efabless.com)
+and Open Circuit Design (opencircuitdesign.com)
+
+----------------------------------------------------------------------------------
+
+Introduction:
+
+    Silicon foundry PDKs are notoriously non-standard, and files obtained
+    from the foundry may end up in any possibly configuration of files and
+    folders.  In addition, silicon foundries are notorious among open source
+    EDA tool enthusiasts for supplying user setups for commercial EDA tools
+    and all but ignoring open source EDA tools.  Open_pdks aims to mitigate
+    the problem by defining a standard layout of files and directories for
+    known open standard formats (e.g., SPICE, verilog, liberty, LEF, etc.)
+    and for various open source EDA tools (e.g., magic, netgen, OpenROAD,
+    klayout) using a Makefile system and a number of conversion scripts to
+    ensure that for any process, all files needed by all EDA tools can be
+    found in predictable locations.
+
+    The scripts aim to be as general-purpose as possible to allow easy
+    adaptation to new tools, formats, and foundries.  Where foundry data
+    is intractably unusable, custom install files can be added to overwrite
+    or annotate vendor data as needed.
+
+    Each foundry process is a subdirectory of the open_pdks top level and
+    has its own Makefile.  The typical install process is to cd to the
+    foundry top level and run "make" (see below for details).
+    
+    The general file structure created by open_pdks is as follows:
+
+	<foundry_root>/
+	    <name_of_pdk_variant_1>/
+	    <name_of_pdk_variant_2>/
+	    ...
+	    <name_of_pdk_variant_x>/
+		libs.tech/
+		    <name_of_EDA_tool_1>/
+		    <name_of_EDA_tool_2>/
+		    ...
+		    <name_of_EDA_tool_x>/
+			<EDA_tool_setup_files>
+		libs.ref
+		    <name_of_IP_library_1>/
+		    <name_of_IP_library_2>/
+		    ...
+		    <name_of_IP_library_x>/
+			<name_of_file_format_1>
+			<name_of_file_format_2>
+			...
+			<name_of_file_format_x>
+			    <vendor_files>
+			
+    Note that this format is very general and does not constrain the
+    EDA tools supported or file formats supported, so long as there
+    are scripts in the system to provide that support.  It is intended
+    that open_pdks can be extended as needed to support new tools or
+    new file formats.
+
+    Current EDA tools supported in this version of open_pdks:
+	Tool	    Directory name
+	--------------------------
+	ngspice	    ngspice
+	magic	    magic
+	netgen	    netgen
+	klayout	    klayout
+	qflow	    qflow
+	openlane    openlane
+		
+    Current IP library file formats supported in this version of open_pdks*:
+	Format	    Directory name
+	--------------------------
+	CDL	    cdl
+	SPICE	    spice
+	magic	    mag, maglef
+	LEF	    lef
+	GDS	    gds
+	verilog	    verilog
+	liberty	    lib
+	PDF**	    doc
+
+	(* "Supported" meaning expected/handled by conversion scripts;
+	   as noted, the install is very general purpose and any name
+	   can be used as a target for any vendor or custom files.)
+	(** or HTML or any valid document format, plus supporting files.)
+
+How to use open_pdks:
+
+    There are a seriously limited number of open foundry PDKs.  Those that
+    are known (SkyWater, MOSIS SCMOS) are included in the repository.  In
+    other cases (X-Fab XH035, XH018) it is possible to get an extension to
+    open_pdks from a known trusted source through NDA verification with
+    the foundry.  In all other cases, foundries should be berated until
+    they agree to support the open_pdks format.
+
+    Open_pdks does not attempt to keep any foundry data to the extent
+    possible.  Instead, it adapts to the file structure available from
+    whatever system each foundry uses for downloads.  Each foundry
+    directory should contain a README file that details how to obtain
+    downloads from the foundry, and what files need to be downloaded.
+    Since the download methods vary wildly, it is up to the user to obtain
+    the foundry data as instructed.  The Makefile in the open_pdks foundry
+    directory then needs to be edited to set the correct path to the
+    foundry source data.
+
+    The installation is a bootstrapping process, so needs to be done in
+    stages.  The first stage installs setup files for all the EDA tools.
+    The second stage installs IP libraries (e.g., standard cells, padframe
+    I/O, analog circuits) and depends heavily on the use of the open EDA
+    tools themselves to fill in any missing file formats.  Therefore the
+    tool setup files need to be installed first, and then the IP libraries.
+    If using a distributed install (see below), then the tool setup files
+    need to be installed and distributed (relocated to the final run-time
+    location) before the IP libraries are installed.
+
+    There are two distinct install types supported by open_pdks:
+
+    (1) Local install:  Use a local install when the EDA tools will be run
+    on a single host, and all the PDK data are on the same host.
+
+    The local install sequence is:
+
+	make
+	make install-local		Install EDA tool setup
+	make install-vendor-local	Install IP libraries
+
+    (2) Distributed install:  Use the distributed install when the PDK
+    will be run from multiple hosts, but will be installed into a
+    different location such as a git repo which is then distributed to
+    all hosts, and may not itself reside in the same root directory tree.
+
+    The distributed install sequence is:
+
+	make
+	make install-dist		Install EDA tool setup
+	make install-vendor-dist	Install IP libraries
+
+    Note that local installs may opt to make symbolic links back to the
+    foundry sources, where possible (see options for foundry_install.py,
+    below).  Distributed installs and local installs may also make
+    symbolic links from any PDK variant back to a "master" PDK variant,
+    where possible (that is, where the files are the same).  For example,
+    a standard cell library will probably be compatible with all metal
+    back-end stacks, and so only one copy of all the library files is
+    needed in one of the PDK variants.  For the other PDK variants, the
+    same files are all symbolic links to the files in the first PDK
+    variant.  But an I/O library would have different layouts for different
+    metal back-end stacks, so layout-dependent files like GDS would be
+    different for each PDK, but layout-independent files like verilog
+    might be symbolic links to files in the first PDK.
+
+Prerequisites:
+
+    The following tools/software stacks are needed to run open_pdks:
+
+	python3
+
+	magic	opencircuitdesign.com/magic or github.com/RTimothyEdwards
+
+		assumed to be installed and discoverable in the standard
+		search path as defined by the shell (version 8.2+ required)
+
+How to make or update an open PDK:
+
+    The backbone of the open_pdks system is a set of scripts found in the
+    common/ subdirectory.  The two main scripts are "preproc.py" and
+    "foundry_install.py", with a host of supporting scripts.
+
+    Creating a new PDK starts with generating a Makefile, which can be
+    done by copying a Makefile from an existing project.  The first thing
+    to do is to define the number of PDK variants (usually based on back-end
+    metal stacks available, but can also include front-end options, especially
+    if they are mutually exclusive rather than simply additional masks).
+    Then create the make and make-install targets for local and distributed
+    install, including install (plain), install-vendor, and install-custom.
+    Define the default source and target paths.
+
+    (Needed:  A "make makefile" script that generates the "local" and "dist"
+    automatically, and potentially can also make all the different PDK
+    targets automatically, from a much shorter and simpler master Makefile.)
+
+    Create the basic scripts for tools.  Since foundries do not support open
+    EDA tools, it is inevitable that these files need to be created by hand
+    unless there is an option to import other formats.  Because Magic is used
+    heavily by open_pdks to create missing file formats from other existing
+    file formats, a Magic techfile is critical.  Each of the basic scripts
+    will contain #ifdef ... #endif and similar conditionals to allow the
+    script to be parsed for each target PDK variant.  Each of these scripts
+    is passed through common/preproc.py to handle the conditionals.  Of course,
+    it is possible to make a separate file for each PDK variant as long as the
+    Makefile handles them properly, but use of the preproc.py script allows
+    all the PDK variants to be handled in the same way, simplifying the Makefile.
+
+    --------------------------------------------------------------------------
+    preproc.py Usage:
+
+        preproc.py input_file [output_file] [-D<variable> ...]
+ 
+	  Where <variable> may be a keyword or a key=value pair
+ 
+	  Syntax:  Basically like cpp.  However, this preprocessor handles
+	  only a limited set of keywords, so it does not otherwise mangle
+	  the file in the belief that it must be C code.  Handling of boolean
+	  relations is important, so these are thoroughly defined (see below)
+ 
+	        #if defined(<variable>) [...]
+	        #ifdef <variable>
+	        #ifndef <variable>
+	        #elseif <variable>
+	        #else
+	        #endif
+ 
+	        #define <variable> [...]
+	        #undef <variable>
+ 
+	        #include <filename>
+ 
+	  <variable> may be
+	        <keyword>
+	        <keyword>=<value>
+ 
+	        <keyword> without '=' is effectively the same as <keyword>=1
+	        Lack of a keyword is equivalent to <keyword>=0, in a conditional.
+ 
+	  Boolean operators (in order of precedence):
+	        !       NOT
+	        &&      AND
+	        ||      OR
+ 
+	  Comments:
+	        Most comments (C-like or Tcl-like) are output as-is.  A
+	        line beginning with "###" is treated as a preprocessor
+	        comment and is not copied to the output.
+ 
+	  Examples;
+	        #if defined(X) || defined(Y)
+	        #else
+	        #if defined(Z)
+	        #endif
+
+    --------------------------------------------------------------------------
+
+    The script common/foundry_install.py handles all the IP library processing
+    and installation.  It generates the local directory structure and populates
+    the directories with foundry vendor data, and filters or otherwise uses
+    open EDA tools to generate missing standard file formats or create file
+    formats needed by the open EDA tools.
+
+    foundry_install.py Usage:
+
+	foundry_install.py [option [option_arguments]] ...
+
+	All options begin with "-" and may be followed by one or more
+	arguments (that do not begin with "-").  The foundry_install.py
+	script may be called multiple times, although it is best to
+	group together all files for the installation of an IP library,
+	since the options given will be used to determine what files are
+	missing and need to be generated.
+
+	Global options:
+	    -link_from <type>  
+			    Make symbolic links to vendor files from target
+			    Types are: "none", "source", or a PDK name.
+			    Default "none" (copy all files from source)
+	    -source <path>
+			    Path to source data top level directory
+	    -target <path>
+			    Path to target top level directory
+	    -local <path>
+			    For distributed installs, this is the local
+	                    path to target top level directory.
+
+	    -library <type> <name>
+			    The install target is an IP library with
+			    name <name>.
+	    -ef_format
+			    Use the original efabless format for file
+			    installs.  This has several differences from
+			    then no-efabless install.  The most important
+			    is that the order of directories for IP libraries
+			    is <file_format>/<library_name> instead of
+			    <library_name>/<file_format>.  As the efabless
+			    platform migrates to the open_pdks developing
+			    standard, this use should eventually be
+			    deprecated.  In open_pdks, the option is set
+			    from the EF_FORMAT variable setting in the Makefile.
+
+	All other options represent installation into specific directories.
+	The primary rule is that if foundry_install.py is passed an option
+	"-library" (see syntax below), then all other non-global options
+	represent subdirectories of the IP library, given the same name as
+	the option word following the "-".  If the foundry_install.py command
+	line does not have an option "-library", then all non-global options
+	represent per-EDA tool subdirectories, where the name of the subdirectory
+	is the same as the option word following the "-".
+
+	Each tool install option has the syntax:
+
+		-<tool_name> <path> [<option_arguments>]
+
+	Each IP library install option has the syntax:
+
+		-<file_format_name> <path> [<option_arguments>]
+	
+	 The <path> is a directory path that is relative to the path prefix
+	 given by the -source option.  The path may be wildcarded with the
+	 character "*".  The specific text "/*/" is always replaced by the
+	 name of the IP library (if "-library" is an option).  Otherwise,
+	 "*" has the usual meaning of matching any characters in a name
+	 (see python glob.glob() command for reference).
+
+	 (Note that the INSTALL variable in the Makefile starts with "set -f"
+	 to suppress the OS from doing wildcard substitution;  otherwise the
+	 wildcards in the install options will get expanded by the OS before
+	 being passed to the install script.)
+
+	 In some cases, it may be required to process an option like "compile"
+	 (see below) on files already in the target path without adding any
+	 source files.  In that case, <path> may be any keyword that does not
+	 point to a valid directory;  "none" is a recommended choice.
+
+	 Library option:
+	
+	       -library <type> <name> [<target>]
+	
+	    <type> may be one of the following:
+
+		digital		Digital standard cells
+		primitive	Primitive devices
+		general		All others
+
+		Analog and I/O libraries fall under the category "general".
+
+	    <name> is the vendor name of the library.
+
+	    [<target>] is the (optional) local name of the library.  If omitted,
+	    then the vendor name is used for the target (there is no particular
+	    reason to specify a different local name for a library).
+
+	 Any number of libraries may be supported, and one "-library" option
+	 may be provided for each supported library.  The use of multiple
+	 libraries for a single run of foundry_install.py only works if the
+	 formats (gds, cdl, lef, etc.) happen to all work with the same wildcards.
+	 But it is generally most common to declare only one library name per
+	 call to foundry_install.py.
+	
+	 Common foundry_install.py options when used with "-library":
+	
+	       -techlef <path> [option_arguments]   Technology LEF file
+	       -doc <path> [option_arguments]	    library documentation
+	       -lef <path> [option_arguments]	    LEF file
+	       -spice <path> [option_arguments]	    SPICE netlists
+	       -cdl <path> [option_arguments]	    CDL netlists
+	       -lib <path> [option_arguments]	    Liberty timing files
+	       -gds <path> [option_arguments]	    GDS layout data
+	       -verilog <path> [option_arguments]   Verilog models
+
+	 Any name can be used after the "-" and the installation of files
+	 will be made into a directory of that name, which will be created
+	 if it does not exist.  The names used above are preferred, for
+	 the sake of compatibility between EDA tools.
+
+	 Of special note is "techlef", as technology LEF files are often
+	 associated with a PDK and not an IP library.  In this system,
+	 the technology LEF file should be associated with each standard
+	 cell library for which it is intended.
+
+	 [option_arguments] may be one of the following:
+
+	       up  <number>
+		    Any tool option can use this argument to indicate that
+		    the source hierarchy should be copied entirely, starting
+		    from <number> levels above the files indicated by <path>.
+		    For example, if liberty files are kept in multiple
+		    directories according to voltage level, then
+	
+			-liberty x/y/z/PVT_*/*.lib
+	
+		    would install all .lib files directly into
+		    libs.ref/<libname>/liberty/*.lib while
+	
+			-liberty x/y/z/PVT_*/*.lib up 1
+	
+		    would install all .lib files into
+		    libs.ref/liberty/<libname>/PVT_*/*.lib.
+	
+	       nospec
+	            Remove timing specification before installing (used with
+		    verilog files only;  could be extended to liberty files).
+
+	       compile
+	            Create a single library from all components.  Used when a
+		    foundry library has inconveniently split an IP library
+		    (LEF, CDL, verilog, etc.) into individual files.
+
+	       compile-only
+		    Same as argument "compile", except that the individual
+		    files are not copied to the target;  only the compiled
+		    library is created.
+
+	       stub
+	            Remove contents of subcircuits from CDL and SPICE netlist,
+		    or verilog files.  This is useful to LVS and other tools
+		    to know the order of pins in a circuit (for CDL or SPICE),
+		    or simply to ignore the contents of the file (any format)
+		    so that the circuit in question is treated as a "black box".
+
+	       priv
+	            Mark the contents being installed as privleged, and put
+		    them in a separate root directory libs.priv where they
+		    can be given additional read/write restrictions.
+
+	       filter <script_file_path>
+		    Process all files through the script <script_file_path>,
+		    which is given as a relative path to the directory
+		    containing the Makefile.  The filter script traditionally
+		    is put in local subdirectory custom/scripts/.  The filter
+		    script should be written to take a single argument, which
+		    is the path to a file, and process that file, and overwrite
+		    the file with the result.  Commonly used filters are found
+		    in the common/ directory.  See common/fixspice.py for an
+		    example.
+
+	       noclobber
+		    Mainly diagnostic.  When specified, any temporary files
+		    used during installation will be retained instead of
+		    deleted after use.  This includes, for example, scripts
+		    passed to magic for running extraction or file format
+		    generation.  It is useful when debugging problems with
+		    the install.
+
+	       anno
+		    Currently only supported for LEF files.  This argument
+		    indicates that the vendor LEF files should be used only
+		    for annotating GDS input with port location information,
+		    but the LEF files themselves should not be installed.
+
+	       noconvert
+		    Install files from source to target, but do not perform
+		    any additional conversions (such as CDL to SPICE, or
+		    GDS or LEF to magic).
+
+	       ignore=<keyword>[,...]
+		    Specifically for CDL and SPICE netlists, ignore any
+		    parameter found matching <keyword>
+
+	       rename=<new-name>
+		    For single files copied from source to target, the
+		    target file should be named <new-name> and not be
+		    given the same name as the source file.  When used
+		    with the "compile" or "compile-only" options, then
+		    the compiled file gets the name <new-name> rather
+		    than taking the name of the library.
+
+	       exclude=<file>[,...]
+		    When using "compile" or "compile-only", exclude any
+		    file in the target directory matching the name <file>.
+
+    File conversions handled by foundry_install.py:
+
+	The following file format conversions can be done automatically by
+	foundry_install.py:
+
+	    CDL to SPICE:  A CDL netlist or library can be converted to a
+			   general-purpose SPICE netlist that can be read
+			   by any tool that can read Berkeley SPICE 3f5
+			   syntax.
+
+	    GDS to LEF:	   An abstract view can be generated from a full
+			   layout view using Magic.
+
+	    GDS to SPICE:  In the absence of any netlist, Magic will
+			   extract a SPICE netlist from a full layout.
+
+	    SPICE (any) to SPICE (ngspice):  The fixspice.py script will
+			   attempt to convert any SPICE model file,
+			   cell library, or netlist to a form that is
+			   compatible with ngspice version 30.
+
+    open_pdks additional Makefile notes:
+
+	The "make install-local" ("make install-dist") step is generally
+	broken into individual make sections, one for each tool (e.g.,
+	magic, netgen, klayout).  There is an additional section called
+	"general" which installs a ".config" directory at the PDK top
+	level, containing a file "nodeinfo.json" which has general
+	information about the PDK that may be used by any tool that
+	understands the key:value pairs used in the JSON file.  Keys used
+	are as follows:
+
+		foundry :	Short name of the foundry, equal to the foundry
+				directory root, above the PDK variants.
+		foundry-name :  Long name of the foundry.
+		node :		The name of the PDK variant
+		feature-size :  The foundry process feature size (e.g., 130nm)
+		status :	"active" or "inactive".  May be used by tools
+				to present or hide specific PDK variants.
+		description :	Long text description of the process variant
+				(e.g., 6-metal stack + MiM caps)
+		options :	List of options, corresponding to the definitions
+				used in the Makefile and passed to preproc.py.
+		stdcells :	List of standard cell libraries available for this
+				PDK variant.
+		iocells :	List of I/O pad cell libraries available for this
+				PDK variant.
+
+	Note that the JSON file is, like other EDA tool setup files, usually a
+	master file that is parsed by preproc.py;  therefore when specifying
+	"options", use #undef before specifying each option name so that the
+	option name itself is ignored by the pre-processor.
+	
+
+Goals of the open_pdks project:
+
+    The intended goal of open_pdks is to be able to support as many open source
+    EDA tools as practical, and to be able to generate all needed files for
+    those tools from any sufficiently complete set of vendor files.
+
+    A number of file converions are not available but would be useful to have:
+
+	    SPICE to liberty:   Create timing files by running simulations
+				on SPICE netlists using ngspice.
+
+	    liberty to verilog: Use the function statements in liberty
+				format to create verilog primitives.  Maybe
+				use liberty timing information to generate
+				LEF specify sections.
+
+	    verilog to liberty: Reverse of the above.  Use verilog logic
+				tables and specify sections to generate liberty
+				functions and timing tables.
+
+    File formats that need to be supported:
+
+	    Schematic and symbol:  There are few standards, so either everyone
+				needs to agree on a good format to use, or there
+				needs to be a lot of scripts to do conversions
+				between formats.  Open EDA tools that could be
+				supported include:
+
+				electric, xcircuit, kicad, sue2
+
+    Other open source EDA tools that need to be supported:
+
+	    OpenROAD
+	    Coriolis2
+	    (add more here. . .)
+
+    Commercial EDA tools can potentially be supported under this same system,
+    provided sufficient compatibility with the file system structure.
+
+    Other scripts needed:
+
+	    Project setup script:  It would be useful to define a "standard
+	    project file structure" that is similar to the standard PDK file
+	    structure defined in open_pdks.  The preferred project setup
+	    based on the efabless model is:
+
+		<project_name>
+		    .config/
+			techdir (symbolic link to open_pdks PDK)
+		    project.json    (information file for tools)
+		    <tool_name>	    (magic, qflow, ngspice, etc.) or
+		    <format_name>   (spice, gds, verilog, etc.)
+
+	    In general, <tool_name> directories are intended to be workspaces
+	    for specific EDA tools (and may have their own nested hierarchies;
+	    e.g., qflow/<digital_block>/source,synthesis,layout) while
+	    <format_name> is a place to keep (final) files of a specific format,
+	    with the intention that any project can easily be made into an
+	    IP library and folded into the open_pdks scheme with little effort.
+
+	    The project.json file contains project information that can be used
+	    by a script to build a setup for any EDA tool.  One goal of the
+	    project.json file is to define "datasheet" (documented elsewhere)
+	    that can be used to drive characterization simulations and create
+	    a datasheet for the project.  Field "ip-name" of "datasheet" is
+	    the canonical name of the project, which can be distinguished from
+	    the project directory top-level name, such that the project can be
+	    moved or copied without affecting the tool flows.
diff --git a/common/cdl2spi.py b/common/cdl2spi.py
new file mode 100755
index 0000000..02e3bb7
--- /dev/null
+++ b/common/cdl2spi.py
@@ -0,0 +1,969 @@
+#!/usr/bin/env python3
+"""
+cdl2spi.py : netlist processor
+Copyright (c) 2016, 2020 efabless Corporation.
+All rights reserved.
+
+usage: cdl2spi.py <inCDLfile> [<outSPCfile>] [options...]
+Writes to .spi to outSPCfile, or stdout if no output argument given. Sets exit
+status if there were non-zero errors.  Most errors/warnings are annotated in-line
+in the stdout each before the relevant line.
+"""
+
+import sys, getopt
+import os
+import re
+import textwrap
+
+# Convert linear scale to area scale suffix 
+# (e.g., if linear scale is 1e-6 ('u') then area scales as 1e-12 ('p'))
+
+def getAreaScale(dscale):
+    ascale = ''
+    if dscale == 'm':
+        ascale = 'u'
+    elif dscale == 'u':
+        ascale = 'p'
+    elif dscale == 'n':
+        ascale = 'a'
+    return ascale
+
+# Check nm (instanceName) in the context of sub (subckt): is it used yet?
+# If not used yet, mark it used, and return as-is.
+# Else generate a unique suffixed version, and mark it used, return it.
+# If 1M suffixes don't generate a unique name, throw exception.
+#   hasInm : global hash, key of hash is (subckt, iname)
+
+hasInm = {}
+def uniqInm(sub, nm):
+    subl=sub.lower()
+    nml=nm.lower()
+    if not (subl, nml) in hasInm:
+        hasInm[ (subl, nml) ] = 1
+        return nm
+    for i in range(1000000):
+        nm2 = nm + "_q" + str(i)
+        nm2l = nm2.lower()
+        if not (subl, nm2l) in hasInm:
+            hasInm[ (subl, nm2l) ] = 1
+            return nm2
+    # not caught anywhere, and gives (intended) non-zero exit status
+    raise AssertionError("uniqInm: range overflow for (%s,%s)" % (sub, nm))
+
+# Map illegal characters in an nm (instanceName) in context of sub (subckt).
+# For ngspice, '/' is illegal in instanceNames. Replace it with '|', BUT
+# then make sure the new name is still unique: does not collide with a name
+# used so far or another already derived unique name.
+
+inmBadChars='/'
+inmRplChars='|'
+inmBadCharREX=re.compile( "["+ inmBadChars+"]" )
+
+def mapInm(sub, nm):
+    nm2 = inmBadCharREX.sub(inmRplChars, nm)
+    return uniqInm(sub, nm2)
+
+# Process subckt line (array of tokens). Return new array of tokens.
+# There might be a ' /' in the line that needs to be deleted. It may be standalone ' / ', or
+# butting against the next token. It may be before all pins, after all pins, or between pins.
+# Do not touch / in a parameter assignment expression.
+# Do not touch / embedded in a pinName.
+# May touch / butting front of very first parameter assignment expression.
+# .subckt NM / p1 p2 p3 x=y g=h
+# .subckt NM /p1 p2 p3 x=y g=h
+# .subckt NM p1 p2 / p3 x=y g=h
+# .subckt NM p1 p2 /p3 x=y g=h
+# .subckt NM p1 p2 p3 / x=y g=h
+# .subckt NM p1 p2 p3 /x=y g=h
+# .subckt NM p1 p2 p3 x=y g=(a/b)     (don't touch this /)
+# .subckt NM p1 p2/3/4 p3 x=y g=(a/b) (don't touch these /)
+
+def mapSubcktDef(tok):
+    # find index of one-past first token (beyond ".subckt NM") containing an =, if any
+    param0 = len(tok)
+    for i in range(2, len(tok)):
+        if '=' in tok[i]:
+            param0 = i+1
+            break
+    # find first token before or including that 1st-param, starting with /:
+    #   strip the slash.
+    for i in range(2, param0):
+        if tok[i][0] == '/':
+            tok[i] = tok[i][1:]
+            if tok[i] == "":
+                del tok[i]
+            break
+    return tok
+
+def test_mapSubcktInst1():
+    print( " ".join(mapSubcktDef( ".subckt abc p1 p2 p3".split())))
+    print( " ".join(mapSubcktDef( ".subckt abc / p1 p2 p3".split())))
+    print( " ".join(mapSubcktDef( ".subckt abc /p1 p2 p3".split())))
+    print( " ".join(mapSubcktDef( ".subckt abc p1 p2 /p3".split())))
+    print( " ".join(mapSubcktDef( ".subckt abc p1 p2 / p3".split())))
+    print( " ".join(mapSubcktDef( ".subckt abc p1 p2 p3 x=4 /y=5".split())))
+    print( " ".join(mapSubcktDef( ".subckt abc p1 p2 p3 x=4/2 y=5".split())))
+    print( " ".join(mapSubcktDef( ".subckt abc p1 p2 p3 / x=4/2 y=5".split())))
+    print( " ".join(mapSubcktDef( ".subckt abc p1 p2 p3 x=4/2 /y=5".split())))
+    print( " ".join(mapSubcktDef( ".subckt abc p1 p2 p3 /x=4/2 y=5".split())))
+    print( " ".join(mapSubcktDef( ".subckt abc p1/2/3 p2 p3 /x=4/2 y=5".split())))
+
+# Process subckt instance line (array of tokens). Return new array of tokens.
+# (This function does not map possible illegal-chars in instanceName).
+# There might be a ' /' in the line that needs to be deleted. It may be standalone ' / ', or
+# butting against the next token. It can only be after pins, before or butting subcktName.
+#
+# Do not touch / in, butting, or after 1st parameter assignment expression.
+# Do not touch / embedded in a netName.
+# Do not touch / embedded in instanceName (they are handled separately elsewhere).
+# xa/b/c p1 p2 p3 / NM x=y g=h
+# xa/b/c p1 p2 p3 /NM x=y g=h
+# xabc p1 p2/3/4 p3 /NM x=(a/b) g=h
+# xabc p1 p2/3/4 p3 / NM x=(a/b) g=h
+# xabc p1 p2/3/4 p3 NM x=(a/b) / g=h    (don't touch; perhaps needs to be an error trapped somewhere)
+# xabc p1 p2/3/4 p3 NM / x=(a/b) g=h    (don't touch; perhaps needs to be an error trapped somewhere)
+# xa/b/c p1 p2/3/4 p3 NM x=(a/b) g=h    (don't touch these /)
+
+def mapSubcktInst(tok):
+    # find index of first token (beyond "x<iname>") containing an =, if any
+    param0 = tlen = len(tok)
+    for i in range(1, tlen):
+        if '=' in tok[i]:
+            param0 = i
+            break
+    # Determine modelName index. Either just prior to 1st-param (if any) else last token.
+    modndx = tlen - 1
+    if param0 < tlen:
+        modndx = param0 - 1;
+    # If modndx now points to a standalone /, that can't be (would yield missing/empty modelName).
+    # Actual modelName must be before it. We need to check, possibly strip / on/before actual modelName.
+    # (Even though standlone / after model are most likely an independent error: we don't touch 'em).
+    while modndx > 1 and tok[modndx] == "/":
+        modndx-=1
+    # Check for standalone / before modelName. Else for modelName starting with /.
+    slashndx = modndx - 1
+    if slashndx > 0 and tok[slashndx] == "/":
+        del tok[slashndx]
+    else:
+        if modndx > 0 and tok[modndx].startswith("/"):
+            tok[modndx] = tok[modndx][1:]
+    return tok
+
+def test_mapSubcktInst2():
+    print( " ".join(mapSubcktInst( "xa/b/c p1 p2 p3 / NM x=y g=h".split())))
+    print( " ".join(mapSubcktInst( "xa/b/c p1 p2 p3 /NM x=y g=h".split())))
+    print( " ".join(mapSubcktInst( "xabc p1 p2/3/4 p3 /NM x=(a/b) g=h".split())))
+    print( " ".join(mapSubcktInst( "xabc p1 p2/3/4 p3 / NM x=(a/b) g=h".split())))
+    print( " ".join(mapSubcktInst( "xabc p1 p2/3/4 p3 NM x=(a/b) / g=h".split())))
+    print( " ".join(mapSubcktInst( "xabc p1 p2/3/4 p3 NM / x=(a/b) g=h".split())))
+    print( " ".join(mapSubcktInst( "xabc p1 p2/3/4 p3 /NM / x=(a/b) g=h".split())))
+    print( " ".join(mapSubcktInst( "xabc p1 p2/3/4 p3 / NM / x=(a/b) g=h".split())))
+    print( " ".join(mapSubcktInst( "xa/b/c p1 p2/3/4 p3 NM x=(a/b) g=h".split())))
+    print( " ".join(mapSubcktInst( "xa/b/c NM x=(a/b) g=h".split())))
+    print( " ".join(mapSubcktInst( "xa/b/c / NM x=(a/b) g=h".split())))
+    print( " ".join(mapSubcktInst( "xa/b/c /NM x=(a/b) g=h".split())))
+    print( " ".join(mapSubcktInst( "xa/b/c /NM".split())))
+
+# Primitives with M=<n> need to add additional par1=<n>.
+# Process token list, return new token list.
+# note: line at this point may be like: m... p1 p2 p3 p4 NMOS M=1 $blah W=... L=...
+# meaning M=1 is not necessarily in a block of all parameter-assignments at EOL.
+# But by processing the line from end backwards, we pick up LAST M= if there are
+# multiple (which condition really should  get flagged as an error).
+# And M= is more likely towards end of the line than front of line (thus faster).
+# If "M=" with no value, do nothing (should also be a flagged error).
+
+def mapMfactor(tok, options={}):
+    # find index of M=* if any, starting from end.
+    # "addinm" is an additional parameter that takes the same argument as M
+    addinm = options['addinm'] if 'addinm' in options else []
+    mndx = 0
+    val = ""
+    for i in range(len(tok)-1, 0, -1):
+        if tok[i].lower().startswith("m="):
+            mndx = i
+            break
+    if mndx > 0:
+        val = tok[i][2:]
+    if val != "":
+        for p in addinm:
+            tok += [ addinm + val]
+    return tok
+
+def test_mapMfactor():
+    print( " ".join(mapMfactor( "m1 p1 p2 p3 p4 NM M=joe".split())))
+    print( " ".join(mapMfactor( "m1 p1 p2 p3 p4 NM M= $SUB=agnd".split())))
+    print( " ".join(mapMfactor( "m1 p1 p2 p3 p4 NM M=2 $SUB=agnd WM=4".split())))
+    print( " ".join(mapMfactor( "m1 p1 p2 p3 p4 NM".split())))
+
+# From $nm=... strip the $. Preserve order on the line. No attempt to
+# detect any resultant collisions. "W=5 $W=10" becomes "W=5 W=10".
+# Don't touch $SUB=... or $[...] or $.model=... or $blah (no assigment).
+
+def mapCDLparam(tok):
+    for i in range(1, len(tok)):
+        if not tok[i].startswith("$"):
+            continue
+        eqi = tok[i].find("=")
+        if eqi > 1:
+            pnm = tok[i][1:eqi]
+            pnml = pnm.lower()
+            if pnml in ("sub",".model"):
+                continue
+            tok[i] = tok[i][1:]
+    return tok
+
+def test_CDLparam():
+    print( " ".join(mapCDLparam( "m1 p1 p2 p3 p4 NM M=joe".split())))
+    print( " ".join(mapCDLparam( "m1 p1 p2 p3 p4 NM M= $SUB=agnd $.model=NM3 $LDD".split())))
+    print( " ".join(mapCDLparam( "m1 p1 p2 p3 p4 NM M= $SUB=agnd $[NM3]".split())))
+    print( " ".join(mapCDLparam( "m1 p1 p2 p3 p4 NM M=joe $X=y".split())))
+    print( " ".join(mapCDLparam( "m1 p1 p2 p3 p4 NM M= $SUB=agnd $.model=NM3 $Z=4 $Z=5".split())))
+    print( " ".join(mapCDLparam( "m1 p1 p2 p3 p4 NM M= W=1 $W=2 W=3 $SUB=agnd $[NM3]".split())))
+
+# Extract $SUB=<tname>. and $[mnm] (or $.model=<mnm>) from tokens.
+# Return array of three items: [ <tname>, <mnm>, tok ] where tok is remainder.
+# Absent $SUB= or model directives give "".
+# Since we delete tokens, process tokens in reverse order.
+
+def mapCDLtermModel(tok):
+    cdlTerm=""
+    cdlModel=""
+    for i in range(len(tok)-1, 0, -1):
+        if not tok[i].startswith("$"):
+            continue
+        tokl = tok[i].lower()
+        if tokl.startswith("$sub="):
+            if cdlTerm == "":
+                cdlTerm = tok[i][5:]
+            del tok[i]
+            continue
+        if tokl.startswith("$.model="):
+            if cdlModel == "":
+                cdlModel = tok[i][8:]
+            del tok[i]
+            continue
+        if tokl.startswith("$[") and tokl.endswith("]"):
+            if cdlModel == "":
+                cdlModel = tok[i][2:-1]
+            del tok[i]
+            continue
+    return [ cdlTerm, cdlModel, tok ]
+
+def test_CDLtermModel():
+    print( mapCDLtermModel( "m1 p1 p2 p3 p4 NM M=joe".split()))
+    print( mapCDLtermModel( "m1 p1 p2 p3 p4 NM $SUB=agnd".split()))
+    print( mapCDLtermModel( "m1 p1 p2 p3 p4 NM $SUB= $[PMOS] M=joe".split()))
+    print( mapCDLtermModel( "m1 p1 p2 p3 p4 NM $sUb=vssa $.MoDeL=PM4 M=joe".split()))
+
+# Determine if a single word looks like a plain numeric spice value.
+# It means a real-number with optional scale suffix, and optional unit suffix.
+# Only unit-suffix we support is m (meters) (because CDL-std describes it).
+# Only scale factors supported are: t,g,meg,k,mil,m,u,n,p,f
+# This does not arithmetically compute anything.
+# Just returns True or False.
+# 220p 10nm -40g 2milm .34e+3 3.1e-4 .34e+3pm 3.1e-4meg
+# (Arguable we should strip a unit-suffix)?
+# def isPlainNumeric(word):
+
+# Segregate any remaining $* items from input tokens.
+# Return [ assignments, directives, remaining ] where each are lists.
+# Those that look like assigments $nm=... are separated from $blah.
+
+def mapDiscard(tok):
+    tlen = len(tok)
+    assign=[]
+    directive=[]
+    for i in range(len(tok)-1, 0, -1):
+        if not tok[i].startswith("$"):
+            continue
+        if "=" in tok[i]:
+            assign += [ tok[i] ]
+            del tok[i]
+            continue
+        directive += [ tok[i] ]
+        del tok[i]
+    return [ assign, directive, tok ]
+
+def test_mapDiscard():
+    print( mapDiscard( "m1 p1 p2 p3 p4 NM $X=4 $LDD M=joe $SUB=agnd ".split()))
+    print( mapDiscard( "m1 p1 p2 p3 p4 NM $X $LDD M=joe $SUB=agnd ".split()))
+    print( mapDiscard( "m1 p1 p2 p3 p4 NM M=joe SUB=agnd ".split()))
+
+# From a token-slice, partition into assignments and non-assignments.
+# Return [ assigns, nonAssigns] where each are lists.
+
+def mapPartAssign(tok):
+    tlen = len(tok)
+    assign=[]
+    nona=[]
+    for i in range(len(tok)):
+        if "=" in tok[i]:
+            assign += [ tok[i] ]
+            continue
+        nona += [ tok[i] ]
+    return [ assign, nona ]
+
+def test_mapPartAssign():
+    print( mapPartAssign( "NM X=4 220nm -1.2e-5g LDD M=joe".split()))
+    print( mapPartAssign( "X=4 M=joe".split()))
+    print( mapPartAssign( "NM 220nm -1.2e-5g LDD".split()))
+    print( mapPartAssign( "".split()))
+
+# Find an assignment to nm in the token list (nm=val).
+# Return [val, tok]. If edit is True, the nm=val is removed from return tok.
+# If multiple nm=... the last one is used. If del is True, all nm=... are removed.
+
+def mapLookup(tok, nm, edit):
+    tlen = len(tok)
+    val=""
+    nmeq = nm.lower() + "="
+    nmeqlen = len(nmeq)
+    for i in range(len(tok)-1, 0, -1):
+        if not tok[i].lower().startswith(nmeq):
+            continue
+        if val == "":
+            val = tok[i][nmeqlen:]
+        if edit:
+            del tok[i]
+    return [ val, tok ]
+
+def test_mapLookup():
+    print( mapLookup( "cnm t1 t2 area=220p PERimeter=100u M=joe par1=1".split(), "periMETER", True))
+    print( mapLookup( "m1 p1 p2 p3 p4 NM $X=4 $LDD M=joe $SUB=agnd ".split(), "x", True))
+    print( mapLookup( "m1 p1 p2 p3 p4 NM X=4 $LDD M=joe $SUB=agnd ".split(), "x", True))
+    print( mapLookup( "m1 p1 p2 p3 p4 NM x=4 $LDD M=joe $SUB=agnd ".split(), "x", True))
+    print( mapLookup( "m1 p1 p2 p3 p4 NM x=4 X=5 xy=6 $LDD M=joe $SUB=agnd ".split(), "x", True))
+    print( mapLookup( "m1 p1 p2 p3 p4 NM x=4 X=5 xy=6 $LDD M=joe $SUB=agnd ".split(), "x", False))
+
+# Format a diode. cdlTerm and cdlModel are passed in but ignored/unused.
+# Processes tok and returns a final token list to be output.
+# If after "dnm t1 t2 modelName ", there are plain numerics (index 4,5), take them as area and peri,
+# (override other area= peri= parameters), format them as area=... peri=...
+# (Caller already error checked the 1st minimum FOUR fields are there).
+
+def mapDiode(cdlTerm, cdlModel, tok, options={}):
+    ignore = options['ignore'] if 'ignore' in options else []
+    # strip remaining $* directives
+    [ ign, ign, tok ] = mapDiscard(tok)
+    # Find explicit area= peri=, remove from tok.
+    [area,  tok] = mapLookup(tok, "area",  True)
+    [peri, tok] = mapLookup(tok, "peri", True)
+    for p in ignore:
+        [ign, tok] = mapLookup(tok, p, True)
+    # For just token-slice after modelName, partition into assignments and non-assigns.
+    [assign, nona] = mapPartAssign(tok[4:])
+    tok = tok[0:4]
+    # TODO: If we have more than two non-assignments it should be an error?
+    # Override area/peri with 1st/2nd non-assigment values.
+    if len(nona) > 0:
+        area = nona.pop(0)
+    if len(nona) > 0:
+        peri = nona.pop(0)
+    if area != "":
+        tok += [ "area=" + area ]
+    if peri != "":
+        tok += [ "peri=" + peri ]
+    tok += nona
+    tok += assign
+    return tok
+
+def test_mapDiode():
+    print( mapDiode( "", "", "dnm t1 t2 DN 220p 100u M=joe par1=1".split()))
+    print( mapDiode( "", "", "dnm t1 t2 DN peri=100u area=220p M=joe par1=1".split()))
+    print( mapDiode( "", "", "dnm t1 t2 DN  M=joe par1=1".split()))
+
+# Format a mosfet. cdlTerm and cdlModel are passed in but ignored/unused.
+# Processes tok and returns a final token list to be output.
+# If after "mnm t1 t2 t3 t4 modelName ", there are plain numerics (index 6,7), take them as W and L,
+# (override other W= L= parameters), format them as W=... L=...
+# (Caller already error checked the 1st minimum SIX fields are there).
+
+def mapMos(cdlTerm, cdlModel, tok, options={}):
+    ignore = options['ignore'] if 'ignore' in options else []
+    # strip remaining $* directives
+    [ ign, ign, tok ] = mapDiscard(tok)
+    # Find explicit W= L=, remove from tok.
+    [w, tok] = mapLookup(tok, "w",  True)
+    [l, tok] = mapLookup(tok, "l", True)
+    for p in ignore:
+        [ign, tok] = mapLookup(tok, p, True)
+    # For scaling, find AS, PS, AD, PD, SA, SB, SC, and SD
+    [sarea, tok] = mapLookup(tok, "as",  True)
+    [darea, tok] = mapLookup(tok, "ad",  True)
+    [sperim, tok] = mapLookup(tok, "ps",  True)
+    [dperim, tok] = mapLookup(tok, "pd",  True)
+    [sa, tok] = mapLookup(tok, "sa",  True)
+    [sb, tok] = mapLookup(tok, "sb",  True)
+    [sd, tok] = mapLookup(tok, "sd",  True)
+
+    dscale = options['dscale'] if 'dscale' in options else ''
+    ascale = getAreaScale(dscale)
+
+    # For just token-slice after modelName, partition into assignments and non-assigns.
+    [assign, nona] = mapPartAssign(tok[6:])
+    tok = tok[0:6]
+    # TODO: If we have more than two non-assignments it should be an error?
+    # Override W/L with 1st/2nd non-assigment values.
+    if len(nona) > 0:
+        w = nona.pop(0)
+    if len(nona) > 0:
+        l = nona.pop(0)
+    if w != "":
+        tok += ["W=" + w + dscale]
+    if l != "":
+        tok += ["L=" + l + dscale]
+    if darea != "":
+        tok += ["AD=" + darea + ascale]
+    if sarea != "":
+        tok += ["AS=" + sarea + ascale]
+    if dperim != "":
+        tok += ["PD=" + dperim + dscale]
+    if sperim != "":
+        tok += ["PS=" + sperim + dscale]
+    if sa != "":
+        tok += ["SA=" + sa + dscale]
+    if sb != "":
+        tok += ["SB=" + sb + dscale]
+    if sd != "":
+        tok += ["SD=" + sd + dscale]
+    tok += nona
+    tok += assign
+    return tok
+
+def test_mapMos():
+    print( mapMos( "", "", "mnm t1 t2 t3 t4 NM 220p 100u M=joe par1=1".split()))
+    print( mapMos( "", "", "mnm t1 t2 t3 t4 NM L=100u W=220p M=joe par1=1".split()))
+    print( mapMos( "", "", "mnm t1 t2 t3 t4 PM M=joe par1=1".split()))
+
+# Format a cap.
+# Processes tok and returns a final token list to be output.
+# Optional cdlTerm adds a 3rd terminal.
+# If after "cnm t1 t2 ", there is plain numeric or C=numeric they are DISCARDED.
+# area/peri/perimeter assignments are respected. Both peri/perimeter assign to perm=
+# in the output. No perimeter= appears in the output.
+# (Caller already error checked the 1st minimum 3 fields are there; plus cdlModel is non-null).
+
+def mapCap(cdlTerm, cdlModel, tok, options={}):
+    ignore = options['ignore'] if 'ignore' in options else []
+    # strip remaining $* directives
+    [ ign, ign, tok ] = mapDiscard(tok)
+    # Find explicit area= peri= perimeter=, remove from tok. peri overwrites perimeter,
+    # both assign to perim. Lookup/discard a C=.
+    [area,  tok] = mapLookup(tok, "area",  True)
+    [perim,  tok] = mapLookup(tok, "perimeter", True)
+    [length,  tok] = mapLookup(tok, "l",  True)
+    [width,  tok] = mapLookup(tok, "w",  True)
+    [peri, tok] = mapLookup(tok, "peri", True)
+    if peri == "":
+        peri = perim
+    [ign, tok] = mapLookup(tok, "c", True)
+    for p in ignore:
+        [ign, tok] = mapLookup(tok, p, True)
+    # For just token-slice after modelName, partition into assignments and non-assigns.
+    # We ignore the nonassignments. Need remaining assignments for M= par1=.
+    [assign, nona] = mapPartAssign(tok[3:])
+    dscale = options['dscale'] if 'dscale' in options else ''
+    ascale = getAreaScale(dscale)
+    tok = tok[0:3]
+    if cdlTerm != "":
+        tok += [ cdlTerm ]
+    if cdlModel != "":
+        tok += [ cdlModel ]
+    if area != "":
+        tok += [ "area=" + area + ascale]
+    if peri != "":
+        tok += [ "peri=" + peri + dscale]
+    if length != "":
+        tok += [ "L=" + length + dscale]
+    if width != "":
+        tok += [ "W=" + width + dscale]
+    tok += assign
+    return tok
+
+def test_mapCap():
+    print( mapCap( "", "CPP", "cnm t1 t2 area=220p peri=100u M=joe par1=1".split()))
+    print( mapCap( "", "CPP", "cnm t1 t2 area=220p perimeter=100u M=joe par1=1".split()))
+    print( mapCap( "", "CPP", "cnm t1 t2 area=220p peri=199u perimeter=100u M=joe par1=1".split()))
+    print( mapCap( "", "CPP", "cnm t1 t2 M=joe par1=1".split()))
+    print( mapCap( "", "CPP", "cnm t1 t2 C=444 area=220p peri=199u perimeter=100u M=joe par1=1".split()))
+    print( mapCap( "", "CPP", "cnm t1 t2 444 M=joe par1=1".split()))
+    print( mapCap( "agnd", "CPP2", "cnm t1 t2 $LDD 220p M=joe par1=1".split()))
+
+# Format a res.
+# Processes tok and returns a final token list to be output.
+# Optional cdlTerm adds a 3rd terminal.
+# If after "rnm t1 t2 ", there is plain numeric or R=numeric they are DISCARDED.
+# W/L assignments are respected.
+# (Caller already error checked the 1st minimum 3 fields are there; plus cdlModel is non-null).
+
+def mapRes(cdlTerm, cdlModel, tok, options={}):
+    dscale = options['dscale'] if 'dscale' in options else ''
+    ignore = options['ignore'] if 'ignore' in options else []
+    # strip remaining $* directives
+    [ ign, ign, tok ] = mapDiscard(tok)
+    # Find explicit w/l, remove from tok.
+    # Lookup/discard a R=.
+    [w,  tok] = mapLookup(tok, "w",  True)
+    [l,  tok] = mapLookup(tok, "l", True)
+    [r, tok] = mapLookup(tok, "r", True)
+    for p in ignore:
+        [ign, tok] = mapLookup(tok, p, True)
+    # For just token-slice after modelName, partition into assignments and non-assigns.
+    # We ignore the nonassignments. Need remaining assignments for M= par1=.
+    [assign, nona] = mapPartAssign(tok[3:])
+    if len(nona) > 0:
+        r = nona.pop(0)
+    tok = tok[0:3]
+    if cdlTerm != "":
+        tok += [ cdlTerm ]
+    if cdlModel != "":
+        tok += [ cdlModel ]
+    if w != "":
+        tok += [ "W=" + w + dscale]
+    if l != "":
+        tok += [ "L=" + l + dscale]
+    # Convert name "short" to zero resistance
+    if r == "short":
+        tok += [ "0" ]
+    tok += assign
+    return tok
+
+def test_mapRes():
+    print( mapRes( "", "RPP1", "rnm t1 t2 w=2 L=1 M=joe par1=1".split()))
+    print( mapRes( "", "RPP1", "rnm t1 t2 444 w=2 L=1 M=joe par1=1".split()))
+    print( mapRes( "", "RPP1", "rnm t1 t2 R=444 w=2 L=1 M=joe par1=1".split()))
+    print( mapRes( "", "R2", "rnm t1 t2 L=2 W=10 M=joe par1=1".split()))
+    print( mapRes( "", "RM2", "rnm t1 t2 area=220p perim=199u perimeter=100u M=joe par1=1".split()))
+    print( mapRes( "", "RM2", "rnm t1 t2 M=joe par1=1".split()))
+    print( mapRes( "agnd", "RM3", "rnm t1 t2 $LDD 220p M=joe par1=1".split()))
+    print( mapRes( "agnd", "RM3", "rnm t1 t2 $LDD 220p L=4 W=12 M=joe par1=1".split()))
+
+# Format a bipolar. cdlTerm is optional. cdlModel is ignored.
+# Processes tok and returns a final token list to be output.
+# Optional cdlTerm adds an optional 4th terminal.
+# If after "qnm t1 t2 t3 model", there are plain numeric (not x=y) they are DISCARDED.
+# (Caller already error checked the 1st minimum 5 fields are there; plus cdlModel is null).
+
+def mapBipolar(cdlTerm, cdlModel, tok, options={}):
+    # strip remaining $* directives
+    ignore = options['ignore'] if 'ignore' in options else []
+    [ ign, ign, tok ] = mapDiscard(tok)
+    for p in ignore:
+        [ign, tok] = mapLookup(tok, p, True)
+    # For just token-slice after modelName, partition into assignments and non-assigns.
+    # We ignore the nonassignments. Need remaining assignments for M= par1=.
+    [assign, nona] = mapPartAssign(tok[5:])
+    # Start with "qnm t1 t2 t3". Insert optional 4th term. Then insert modelName.
+    model = tok[4]
+    tok = tok[0:4]
+    if cdlTerm != "":
+        tok += [ cdlTerm ]
+    tok += [ model ]
+    tok += assign
+    return tok
+
+def test_mapBipolar():
+    print( mapBipolar( "", "any", "qnm t1 t2 t3 QP1 M=joe par1=1".split()))
+    print( mapBipolar( "", "", "qnm t1 t2 t3 QP2 M=joe par1=1".split()))
+    print( mapBipolar( "", "", "qnm t1 t2 t3 QP2 $EA=12 M=joe par1=1".split()))
+    print( mapBipolar( "", "", "qnm t1 t2 t3 QP3 M=joe EA=14 par1=1".split()))
+    print( mapBipolar( "agnd", "", "qnm t1 t2 t3 QP4 $LDD 220p M=joe par1=1".split()))
+    print( mapBipolar( "agnd", "any", "qnm t1 t2 t3 QP4 $LDD 220p L=4 W=12 M=joe par1=1".split()))
+
+#------------------------------------------------------------------------
+# Main routine to do the conversion from CDL format to SPICE format
+#------------------------------------------------------------------------
+
+def cdl2spice(fnmIn, fnmOut, options):
+
+    err = 0
+    warn = 0
+
+    # Open and read input file
+
+    try:
+        with open(fnmIn, 'r') as inFile:
+            cdltext = inFile.read()
+            # Unwrap continuation lines
+            lines = cdltext.replace('\n+', ' ').splitlines()
+    except:
+        print('cdl2spi.py: failed to open ' + fnmIn + ' for reading.', file=sys.stderr)
+        return 1
+
+    # Loop over original CDL:
+    #   record existing instanceNames (in subckt-context), for efficient membership
+    #   tests later.  Track the subckt-context, instanceNames only need to be unique
+    #   within current subckt.
+
+    sub = ""
+    for i in lines:
+        if i == "":
+            continue
+        tok = i.split()
+        tlen = len(tok)
+        if tlen == 0:
+            continue
+        t0 = tok[0].lower()
+        if t0 == '.subckt' and tlen > 1:
+            sub = tok[1].lower()
+            continue
+        if t0 == '.ends':
+            sub = ""
+            continue
+        c0 = tok[0][0].lower()
+        if c0 in '.*':
+            continue
+        # this will ignore primitive-devices (jfet) we don't support.
+        # TODO: flag them somewhere else as an ERROR.
+        if not c0 in primch2:
+            continue
+        # a primitive-device or subckt-instance we care about and support
+        # For subckt-instances record the instanceName MINUS lead x.
+        nm = tok[0]
+        if c0 == 'x':
+            nm = nm[1:]
+        hasInm[ (sub, nm) ] = 1
+
+
+    # loop over original CDL: do conversions.
+    # Track the subckt-context while we go; instanceNames only need to be unique
+    # within current subckt.
+
+    sub = ""
+    tmp = []
+    for i in lines:
+        tok = i.split()
+        tlen = len(tok)
+        # AS-IS: empty line or all (preserved) whitespace
+        if tlen == 0:
+            tmp += [ i ]
+            continue
+
+        # get 1st-token original, as lowercase, and 1st-char of 1st-token lowercase.
+        T0 = tok[0]
+        t0 = T0.lower()
+        c0 = t0[0]
+
+        # AS-IS: comment
+        if c0 == '*':
+            tmp += [i]
+            continue
+
+        # AS-IS: .ends; update subckt-context to outside-of-a-subckt
+        if t0 == '.ends':
+            sub = ""
+            tmp += [i]
+            continue
+
+        # change .param to a comment, output it
+        if t0 == '.param':
+            tmp += ["*"+i]
+            continue
+
+        # track .subckt context; process / in .subckt line, and output it.
+        if t0 == '.subckt':
+            if tlen < 2:
+                err+=1
+                msg = "*cdl2spi.py: ERROR: Missing subckt name:"
+                tmp += [ msg, i ]
+                continue
+            T1 = tok[1]
+            sub = T1.lower()
+            tok = mapSubcktDef(tok)
+            tmp += [ " ".join(tok) ]
+            continue
+
+        # subckt instance line. Process /, map instanceName (exclude x), and output it.
+        if c0 == 'x':
+            nm = T0[1:]
+            if nm == "":
+                err+=1
+                msg = "*cdl2spi.py: ERROR: Missing subckt instance name:"
+                tmp += [ msg, i ]
+                continue
+            inm = mapInm(sub, nm)
+            tok[0] = T0[0] + inm
+            tok = mapSubcktInst(tok)
+            tmp += [ " ".join(tok) ]
+            continue
+
+        # all primitives: need instanceName mapped, including 1st char in name.
+        # all primitives: need M=n copied to an added par1=n
+        # all primitives: Except for $SUB=... $[...] strip $ from $nm=... parameters.
+        # all primitives: Isolate $SUB and $[...] for further processing (in
+        # primitive-specific sections).
+
+        cdlTerm=""
+        cdlModel=""
+        if c0 in primch:
+            nm = T0[1:]
+            if nm == "":
+                err+=1
+                msg = "*cdl2spi.py: ERROR: Missing primitive instance name:"
+                tmp += [ msg, i ]
+                continue
+            nm = T0
+            nm = mapInm(sub, nm)
+            tok[0] = nm
+            tok = mapMfactor(tok, options)
+            tok = mapCDLparam(tok)
+            [cdlTerm, cdlModel, tok] = mapCDLtermModel(tok)
+
+        # diode formats:
+        #   dname t1 t2 model <numericA> <numericP> m=...
+        # l:dname t1 t2 model {<numericA>} {<numericP>} {m=...} {$SUB=...}
+        # out format:
+        #   Xdname t1 t2 model area=<numericA> peri=<numericP> m=... par1=...
+        # We flag $SUB=... : because so far (for XFAB) we CHOOSE not to support three
+        # terminal diodes.
+        # CDL-std does not define $[...] as available for diodes, so we silently ignore
+        # it.
+        # Always 2 terminals and a modelName. 
+        # We already have peri=... and area=... and have ambiguity with plain numerics.
+        # TODO: generate a warning in case of ambiguity, but prefer plain numerics
+        # (with nm= added).
+
+        if c0 == "d":
+            tlen = len(tok)
+            if tlen < 4:
+                err+=1
+                msg = "*cdl2spi.py: ERROR: Diode does not have minimum two terminals and model:"
+                tmp += [ msg, i ]
+                continue
+            if cdlTerm != "":
+                err+=1
+                msg = "*cdl2spi.py: ERROR: Diode does not support $SUB=...:"
+                tmp += [ msg, i ]
+                continue
+            tok = mapDiode(cdlTerm, cdlModel, tok, options)
+            # add X to tok0.
+            if options['subckt']:
+                tok[0] = "X" + tok[0]
+            tmp += [ " ".join(tok) ]
+            continue
+
+        # mosfet formats:
+        #   mname t1 t2 t3 t4 model W=... L=... m=...
+        # l:mname t1 t2 t3 t4 model {W=... L=...} {m=...} {$NONSWAP} {$LDD[type]}
+        # l:mname t1 t2 t3 t4 model <width> <length> {m=...} {$NONSWAP} {$LDD[type]}
+        # output format:
+        #   Xmname t1 t2 t3 t4 model W=... L=... m=... par1=...
+        # Fixed 4 terminals and a modelName.
+        # May already have W= L= and ambiguity with plain numerics.
+        # TODO: generate a warning in case of ambiguity, but prefer plain numerics
+        # (with nm= added).
+        if c0 == "m":
+            tlen = len(tok)
+            if tlen < 6:
+                err+=1
+                msg = "*cdl2spi.py: ERROR: Mosfet does not have minimum four terminals and model:"
+                tmp += [ msg, i ]
+                continue
+            if cdlTerm != "":
+                err+=1
+                msg = "*cdl2spi.py: ERROR: Mosfet does not support $SUB=...:"
+                tmp += [ msg, i ]
+                continue
+            tok = mapMos(cdlTerm, cdlModel, tok, options)
+            # add X to tok0.
+            if options['subckt']:
+                tok[0] = "X" + tok[0]
+            tmp += [ " ".join(tok) ]
+            continue
+
+        # cap formats:
+        #  cname t1 t2   <numeric0> $[model] $SUB=t3 m=...
+        #  cname t1 t2   <numeric0> $[model] m=...
+        #? cname t1 t2 C=<numeric0> $[model] $SUB=t3 m=...
+        #? cname t1 t2   <numeric0> $[model] $SUB=t3 area=<numericA> perimeter=<numericP> m=...
+        #? cname t1 t2   <numeric0> $[model] $SUB=t3 area=<numericA> peri=<numericP> m=...
+        #l:cname t1 t2  {<numeric0>} {$[model]} {$SUB=t3} {m=...}
+        # out formats:
+        #  Xcname t1 t2    model area=<numericA> peri=<numericP> m=... par1=...
+        #  Xcname t1 t2 t3 model area=<numericA> peri=<numericP> m=... par1=...
+        # We require inm, two terminals. Require $[model]. Optional 3rd-term $SUB=...
+        # If both peri and perimeter, peri overrides.
+        # Both area/peri are optional. The optional [C=]numeric0 is discarded always.
+
+        if c0 == "c":
+            tlen = len(tok)
+            if tlen < 3:
+                err+=1
+                msg = "*cdl2spi.py: ERROR: Cap does not have minimum two terminals:"
+                tmp += [ msg, i ]
+                continue
+            if cdlModel == "":
+                err+=1
+                msg = "*cdl2spi.py: ERROR: Cap missing required $[<model>] directive:"
+                tmp += [ msg, i ]
+                continue
+            tok = mapCap(cdlTerm, cdlModel, tok, options)
+            # add X to tok0.
+            if options['subckt']:
+                tok[0] = "X" + tok[0]
+            tmp += [ " ".join(tok) ]
+            continue
+
+        # res formats:
+        #   rname n1 n2   <numeric> $SUB=t3 $[model] $w=... $l=... m=...
+        # c:rname n1 n2 R=<numeric> $[model] w=... l=... m=... $SUB=t3 
+        # l:rname n1 n2   {<numeric>} {$SUB=t3} {$[model]} {$w=...} {$l=...} {m=...}
+        #  (all after n1,n2 optional)
+        #    We require $[model]. And add 3rd term IFF $SUB=.
+        # out format:
+        #   Xrname n1 n2 t3 model w=... l=... m=... par1=...
+        if c0 == "r":
+            tlen = len(tok)
+            if tlen < 3:
+                err+=1
+                msg = "*cdl2spi.py: ERROR: Res does not have minimum two terminals:"
+                tmp += [ msg, i ]
+                continue
+            if cdlModel == "":
+                err+=1
+                msg = "*cdl2spi.py: ERROR: Res missing required $[<model>] directive:"
+                tmp += [ msg, i ]
+                continue
+            tok = mapRes(cdlTerm, cdlModel, tok, options)
+            # add X to tok0.
+            if options['subckt']:
+                tok[0] = "X" + tok[0]
+            tmp += [ " ".join(tok) ]
+            continue
+
+        # bipolar formats:
+        #   qname n1 n2 n3 model <numeric> M=... $EA=...
+        #   qname n1 n2 n3 model $EA=... <numeric> M=... 
+        #   qname n1 n2 n3 model {$EA=...} {$W=...} {$L=...} {$SUB=...} {M=...}
+        # No: l:qname n1 n2 n3 {nsub} model {$EA=...} {$W=...} {$L=...} {$SUB=...} {M=...}
+        #   CDL-std adds {nsub} way to add substrate before model: We don't support it.
+        #   Add 3rd term IFF $SUB=. We propagate optional W/L (or derived from $W/$L).
+        #   EA is emitterSize; not supported by XFAB: deleted.
+        #   We require 3-terminals and model. It is an error to specify $[model].
+        #
+        # out format:
+        #   Xqname n1 n2 n3 model M=... par1=...
+        if c0 == "q":
+            tlen = len(tok)
+            if tlen < 5:
+                err+=1
+                msg = "*cdl2spi.py: ERROR: Bipolar does not have minimum three terminals and a model:"
+                tmp += [ msg, i ]
+                continue
+            if cdlModel != "":
+                err+=1
+                msg = "*cdl2spi.py: ERROR: Bipolar does not support $[<model>] directive:"
+                tmp += [ msg, i ]
+                continue
+            tok = mapBipolar(cdlTerm, cdlModel, tok, options)
+            # add X to tok0.
+            if options['subckt']:
+                tok[0] = "X" + tok[0]
+            tmp += [ " ".join(tok) ]
+            continue
+
+        # Anything else. What to do, preserve AS-IS with warning, or 
+        # flag them as ERRORs?
+        tmp += [ "*cdl2spi.py: ERROR: unrecognized line:", i ]
+        err+=1
+        # tmp += [ "*cdl2spi.py: WARNING: unrecognized line:", " ".join(tok) ]
+        # tmp += [ "*cdl2spi.py: WARNING: unrecognized line:", i ]
+        # warn+=1
+
+    # Re-wrap continuation lines at 80 characters
+    lines = []
+    for line in tmp:
+        lines.append('\n+ '.join(textwrap.wrap(line, 80)))
+
+    # Write output
+
+    if fnmOut == sys.stdout:
+        for i in lines:
+            print(i)
+    else:
+        try:
+            with open(fnmOut, 'w') as outFile:
+                for i in lines:
+                    print(i, file=outFile)
+        except:
+            print('cdl2spi.py: failed to open ' + fnmOut + ' for writing.', file=sys.stderr)
+            return 1
+
+    # exit status: indicates if there were errors.
+    print( "*cdl2spi.py: %d errors, %d warnings" % (err, warn))
+    return err
+
+if __name__ == '__main__':
+
+    options = {}
+
+    # Set option defaults
+    options['debug'] = False
+    options['subckt'] = False
+    options['dscale'] = ''
+    options['addinm'] = []
+    options['ignore'] = []
+
+    arguments = []
+    for item in sys.argv[1:]:
+        if item.find('-', 0) == 0:
+            thisopt = item.split('=')
+            optname = thisopt[0][1:]
+            optval = '='.join(thisopt[1:])
+            if not optname in options:
+                print('Unknown option -' + optname + '; ignoring.')
+            else:
+                lastoptval = options[optname]
+                if len(thisopt) == 1:
+                    options[optname] = True
+                elif lastoptval == '':
+                    options[optname] = optval
+                else:
+                    options[optname].append(optval)
+        else:
+            arguments.append(item)
+
+    # Supported primitive devices (FET, diode, resistor, capacitor, bipolar)
+    primch  = 'mdrcq'
+    primch2 = 'mdrcqx'
+
+    if len(arguments) > 0:
+        fnmIn = arguments[0]
+
+    if len(arguments) > 1:
+        fnmOut = arguments[1]
+    else:
+        fnmOut = sys.stdout
+
+    if options['debug']:
+        test_mapSubcktInst1()
+        test_mapSubcktInst2()
+        test_mapMfactor()
+        test_CDLparam()
+        test_CDLtermModel()
+        test_mapDiscard()
+        test_mapPartAssign()
+        test_mapLookup()
+        test_mapDiode()
+        test_mapMos()
+        test_mapCap()
+        test_mapRes()
+        test_mapBipolar()
+
+    elif len(arguments) > 2 or len(arguments) < 1 :
+        print('Usage: cdl2spi.py <cdlFileName> [<spiFileName>]')
+        print('   Options:' )
+        print('       -debug              run debug tests')
+        print('       -dscale=<suffix>    rescale lengths with <suffix>')
+        print('       -addinm=<param>     add multiplier parameter <param>')
+        print('       -ignore=<param>     ignore parameter <param>')
+        print('       -subckt             convert primitive devices to subcircuits')
+        sys.exit(1)
+
+    else:
+        if options['debug'] == True:
+            print('Diagnostic:  options = ' + str(options))
+        result = cdl2spice(fnmIn, fnmOut, options)
+        sys.exit(result)
+
diff --git a/common/change_gds_date.py b/common/change_gds_date.py
new file mode 100755
index 0000000..0aa0056
--- /dev/null
+++ b/common/change_gds_date.py
@@ -0,0 +1,142 @@
+#!/bin/env python3
+# Script to read a GDS file, modify the timestamp(s), and rewrite the GDS file.
+
+import os
+import sys
+import datetime
+
+def usage():
+    print('change_gds_date.py <create_stamp> <mod_stamp> <path_to_gds_in> [<path_to_gds_out>]')
+
+if __name__ == '__main__':
+    debug = False
+
+    if len(sys.argv) == 1:
+        print("No options given to change_gds_date.py.")
+        usage()
+        sys.exit(0)
+
+    optionlist = []
+    arguments = []
+
+    for option in sys.argv[1:]:
+        if option.find('-', 0) == 0:
+            optionlist.append(option)
+        else:
+            arguments.append(option)
+
+    if len(arguments) < 3 or len(arguments) > 4:
+        print("Wrong number of arguments given to change_gds_date.py.")
+        usage()
+        sys.exit(0)
+
+    if '-debug' in optionlist:
+        debug = True
+
+    createstamp = arguments[0]
+    modstamp = arguments[1]
+    source = arguments[2]
+
+    # If modstamp is zero or negative, then set the modification timestamp
+    # to be the same as the creation timestamp.
+    try:
+        if int(modstamp) <= 0:
+            modstamp = createstamp
+    except:
+        pass
+
+    # If only three arguments are provided, then overwrite the source file.
+    if len(arguments) == 4:
+        dest = arguments[3]
+    else:
+        dest = arguments[2]
+
+    sourcedir = os.path.split(source)[0]
+    gdsinfile = os.path.split(source)[1]
+
+    destdir = os.path.split(dest)[0]
+    gdsoutfile = os.path.split(dest)[1]
+
+    with open(source, 'rb') as ifile:
+        gdsdata = ifile.read()
+
+    # Generate 12-byte modification timestamp data from date.
+    try:
+        modtime = datetime.datetime.fromtimestamp(int(modstamp))
+    except:
+        modtime = datetime.datetime.strptime(modstamp, "%m/%d/%Y %H:%M:%S")
+
+    modyear = modtime.year - 1900
+
+    year = modyear.to_bytes(2, byteorder='big')
+    month = modtime.month.to_bytes(2, byteorder='big')
+    day = modtime.day.to_bytes(2, byteorder='big')
+    hour = modtime.hour.to_bytes(2, byteorder='big')
+    minute = modtime.minute.to_bytes(2, byteorder='big')
+    second = modtime.second.to_bytes(2, byteorder='big')
+
+    gdsmodstamp = year + month + day + hour + minute + second
+
+    # Generate 12-byte creation timestamp data from date.
+    try:
+        createtime = datetime.datetime.fromtimestamp(int(createstamp))
+    except:
+        createtime = datetime.datetime.strptime(createstamp, "%m/%d/%Y %H:%M:%S")
+
+    createyear = createtime.year - 1900
+
+    year = createyear.to_bytes(2, byteorder='big')
+    month = createtime.month.to_bytes(2, byteorder='big')
+    day = createtime.day.to_bytes(2, byteorder='big')
+    hour = createtime.hour.to_bytes(2, byteorder='big')
+    minute = createtime.minute.to_bytes(2, byteorder='big')
+    second = createtime.second.to_bytes(2, byteorder='big')
+
+    gdscreatestamp = year + month + day + hour + minute + second
+
+    # To be done:  Allow the user to select which datestamps to change
+    # (library or structure).  Otherwise, apply the same datestamps to both.
+
+    recordtypes = ['beginstr', 'beginlib']
+    recordfilter = [5, 1]
+
+    datalen = len(gdsdata)
+    dataptr = 0
+    while dataptr < datalen:
+        # Read stream records up to any string, then search for search text.
+        bheader = gdsdata[dataptr:dataptr + 2]
+        reclen = int.from_bytes(bheader, 'big')
+        if reclen == 0:
+            print('Error: found zero-length record at position ' + str(dataptr))
+            break
+
+        rectype = gdsdata[dataptr + 2]
+        datatype = gdsdata[dataptr + 3]
+
+        brectype = rectype.to_bytes(1, byteorder='big')
+        bdatatype = datatype.to_bytes(1, byteorder='big')
+
+        if rectype in recordfilter:
+            # Datatype should be 2
+            if datatype != 2:
+                print('Error:  Header data type is not 2-byte integer!')
+            if reclen != 28:
+                print('Error:  Header record length is not 28!')
+            if debug:
+                print('Record type = ' + str(rectype) + ' data type = ' + str(datatype) + ' length = ' + str(reclen))
+
+            before = gdsdata[0:dataptr]
+            after = gdsdata[dataptr + reclen:]
+
+            # Assemble the new record
+            newrecord = bheader + brectype + bdatatype + gdscreatestamp + gdsmodstamp
+            # Reassemble the GDS data around the new record
+            gdsdata = before + newrecord + after
+
+        # Advance the pointer past the data
+        dataptr += reclen
+
+    with open(dest, 'wb') as ofile:
+        ofile.write(gdsdata)
+
+    exit(0)
diff --git a/common/change_gds_string.py b/common/change_gds_string.py
new file mode 100755
index 0000000..b8a0321
--- /dev/null
+++ b/common/change_gds_string.py
@@ -0,0 +1,127 @@
+#!/bin/env python3
+# Script to read a GDS file, modify the given string, and rewrite the GDS file.
+# The string may be a substring;  the GDS file will be parsed completely for
+# library name, structure name, instance name, and other strings, and the
+# replacement made everywhere it occurs, finding the bounds of the entire
+# string around the search text, and adjusting the record bounds accordingly.
+
+import os
+import sys
+
+def usage():
+    print('change_gds_string.py <old_string> <new_string> <path_to_gds_in> [<path_to_gds_out>]')
+
+if __name__ == '__main__':
+    debug = False
+
+    if len(sys.argv) == 1:
+        print("No options given to change_gds_string.py.")
+        usage()
+        sys.exit(0)
+
+    optionlist = []
+    arguments = []
+
+    for option in sys.argv[1:]:
+        if option.find('-', 0) == 0:
+            optionlist.append(option)
+        else:
+            arguments.append(option)
+
+    if len(arguments) < 3 or len(arguments) > 4:
+        print("Wrong number of arguments given to change_gds_string.py.")
+        usage()
+        sys.exit(0)
+
+    if '-debug' in optionlist:
+        debug = True
+
+    oldstring = arguments[0]
+    newstring = arguments[1]
+    source = arguments[2]
+
+    # If only three arguments are provided, then overwrite the source file.
+    if len(arguments) == 4:
+        dest = arguments[3]
+    else:
+        dest = arguments[2]
+
+    sourcedir = os.path.split(source)[0]
+    gdsinfile = os.path.split(source)[1]
+
+    destdir = os.path.split(dest)[0]
+    gdsoutfile = os.path.split(dest)[1]
+
+    with open(source, 'rb') as ifile:
+        gdsdata = ifile.read()
+
+    # To be done:  Allow the user to select a specific record type or types
+    # in which to restrict the string substitution.  If no restrictions are
+    # specified, then substitue in library name, structure name, and strings.
+
+    recordtypes = ['libname', 'strname', 'sname', 'string']
+    recordfilter = [2, 6, 18, 25]
+    bsearch = bytes(oldstring, 'ascii')
+    brep = bytes(newstring, 'ascii')
+
+    datalen = len(gdsdata)
+    if debug:
+        print('Original data length = ' + str(datalen))
+    dataptr = 0
+    while dataptr < datalen:
+        # Read stream records up to any string, then search for search text.
+        bheader = gdsdata[dataptr:dataptr + 2]
+        reclen = int.from_bytes(bheader, 'big')
+        newlen = reclen
+        if newlen == 0:
+            print('Error: found zero-length record at position ' + str(dataptr))
+            break
+
+        rectype = gdsdata[dataptr + 2]
+        datatype = gdsdata[dataptr + 3]
+
+        if rectype in recordfilter:
+            # Datatype 6 is STRING
+            if datatype == 6:
+                if debug:
+                    print('Record type = ' + str(rectype) + ' data type = ' + str(datatype) + ' length = ' + str(reclen))
+
+                bstring = gdsdata[dataptr + 4: dataptr + reclen]
+                repstring = bstring.replace(bsearch, brep)
+                if repstring != bstring:
+                    before = gdsdata[0:dataptr]
+                    after = gdsdata[dataptr + reclen:]
+                    newlen = len(repstring) + 4
+                    # Record sizes must be even
+                    if newlen % 2 != 0:
+                        # Was original string padded with null byte?  If so,
+                        # remove the null byte and reduce newlen.  Otherwise,
+                        # add a null byte and increase newlen.
+                        if bstring[-1] == 0:
+                            repstring = repstring[0:-1]
+                            newlen -= 1
+                        else:
+                            repstring += b'\x00'
+                            newlen += 1
+                            
+                    bnewlen = newlen.to_bytes(2, byteorder='big')
+                    brectype = rectype.to_bytes(1, byteorder='big')
+                    bdatatype = datatype.to_bytes(1, byteorder='big')
+
+                    # Assemble the new record
+                    newrecord = bnewlen + brectype + bdatatype + repstring
+                    # Reassemble the GDS data around the new record
+                    gdsdata = before + newrecord[0:newlen] + after
+                    # Adjust the data end location
+                    datalen += (newlen - reclen)
+
+                    if debug:
+                        print('Replaced ' + str(bstring) + ' with ' + str(repstring)) 
+
+        # Advance the pointer past the data
+        dataptr += newlen
+
+    with open(dest, 'wb') as ofile:
+        ofile.write(gdsdata)
+
+    exit(0)
diff --git a/common/changepath.py b/common/changepath.py
new file mode 100755
index 0000000..3ebd38c
--- /dev/null
+++ b/common/changepath.py
@@ -0,0 +1,75 @@
+#!/usr/bin/env python3
+#
+# changepath.py:  Look up all .mag files in maglef paths from the root
+# PDK directory given as the first argument, and replace them with the
+# path that is given as the second argument.
+#
+# The purpose of this script is to prepare a technology for relocation.
+# This script may be expanded to take care of all relocation issues.
+# For now, only the property "GDS_FILE" in each .mag file is modified.
+#
+# Usage, e.g.:
+#
+# changepath.py /home/tim/projects/efabless/tech/XFAB/EFXH035B/libs.ref/mag/D_CELLS /ef/tech/XFAB/EFXH035B/libs.ref/mag/D_CELLS
+
+import os
+import re
+import sys
+import glob
+
+def usage():
+    print("changepath.py <orig_path_to_dir> <target_path_to_dir>")
+    return 0
+
+if __name__ == '__main__':
+
+    if len(sys.argv) == 1:
+        usage()
+        sys.exit(0)
+
+    optionlist = []
+    arguments = []
+
+    for option in sys.argv[1:]:
+        if option.find('-', 0) == 0:
+            optionlist.append(option)
+        else:
+            arguments.append(option)
+
+    if len(arguments) != 2:
+        print("Wrong number of arguments given to changepath.py.")
+        usage()
+        sys.exit(0)
+
+    source = arguments[0]
+    target = arguments[1]
+
+    gdssource = source.replace('/mag/', '/gds/')
+    gdssource = gdssource.replace('/maglef/', '/gds/')
+    gdstarget = target.replace('/mag/', '/gds/')
+    gdstarget = gdstarget.replace('/maglef/', '/gds/')
+
+    magpath = source + '/*.mag'
+    sourcefiles = glob.glob(magpath)
+
+    if len(sourcefiles) == 0:
+        print("Warning:  No files were found in the path " + magpath + ".")
+
+    for file in sourcefiles:
+        # print("Converting file " + file)
+        with open(file, 'r') as ifile:
+            magtext = ifile.read().splitlines() 
+
+        proprex = re.compile('string[ \t]+GDS_FILE[ \t]+([^ \t]+)')
+        with open(file, 'w') as ofile:
+            for line in magtext:
+                pmatch = proprex.match(line)
+                if pmatch:
+                    filepath = pmatch.group(1)
+                    if filepath.startswith(gdssource):
+                        print('string GDS_FILE ' + filepath.replace(gdssource, gdstarget), file=ofile)
+                    else:
+                        print(line, file=ofile)
+                else:
+                    print(line, file=ofile)
+
diff --git a/common/changetech.sh b/common/changetech.sh
new file mode 100755
index 0000000..383aac6
--- /dev/null
+++ b/common/changetech.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+#
+# Example file converts the techname in all magic database files.
+
+for i in `ls *.mag` ; do
+    /ef/efabless/bin/preproc.py -DEFXH035A=EFXH035B $i > tmp.out
+    mv tmp.out $i ;
+done
+
diff --git a/common/compare_dirs.py b/common/compare_dirs.py
new file mode 100755
index 0000000..21f8dc6
--- /dev/null
+++ b/common/compare_dirs.py
@@ -0,0 +1,439 @@
+#!/usr/bin/env python3
+#
+# compare_dirs.py <path>
+#
+#
+# Compare the format subdirectories of <path> and report on which files do not appear
+# in all of them.  If a directory has no files in it, then it is ignored.
+#
+# NOTE:  This script was not designed for files in the "ef_format" file structure.
+
+import os
+import sys
+
+def compare_dirs(path, styles, formats, debug):
+    do_cdl = True if 'cdl' in formats else False
+    do_gds = True if 'gds' in formats else False
+    do_lef = True if 'lef' in formats else False
+    do_mag = True if 'mag' in formats else False
+    do_maglef = True if 'maglef' in formats else False
+    do_verilog = True if 'verilog' in formats else False
+
+    try:
+         d1 = os.listdir(path + '/cdl')
+    except:
+         d1 = []
+    d1e = list(item for item in d1 if os.path.splitext(item)[1] == '.cdl')
+    d1r = list(os.path.splitext(item)[0] for item in d1e)
+    try:
+        d2 = os.listdir(path + '/gds')
+    except:
+        d2 = []
+    d2e = list(item for item in d2 if os.path.splitext(item)[1] == '.gds')
+    d2r = list(os.path.splitext(item)[0] for item in d2e)
+    try:
+        d3 = os.listdir(path + '/lef')
+    except:
+        d3 = []
+    d3e = list(item for item in d3 if os.path.splitext(item)[1] == '.lef')
+    d3r = list(os.path.splitext(item)[0] for item in d3e)
+    try:
+        d4 = os.listdir(path + '/mag')
+    except:
+        d4 = []
+    d4e = list(item for item in d4 if os.path.splitext(item)[1] == '.mag')
+    d4r = list(os.path.splitext(item)[0] for item in d4e)
+    try:
+        d5 = os.listdir(path + '/maglef')
+    except:
+        d5 = []
+    d5e = list(item for item in d5 if os.path.splitext(item)[1] == '.mag')
+    d5r = list(os.path.splitext(item)[0] for item in d5e)
+    try:
+        d6 = os.listdir(path + '/verilog')
+    except:
+        d6 = []
+    d6e = list(item for item in d6 if os.path.splitext(item)[1] == '.v')
+    d6r = list(os.path.splitext(os.path.splitext(item)[0])[0] for item in d6e)
+ 
+    d1r.sort()
+    d2r.sort()
+    d3r.sort()
+    d4r.sort()
+    d5r.sort()
+    d6r.sort()
+
+    d1_2 = list(item for item in d1r if item not in d2r)
+    d1_3 = list(item for item in d1r if item not in d3r)
+    d1_4 = list(item for item in d1r if item not in d4r)
+    d1_5 = list(item for item in d1r if item not in d5r)
+    d1_6 = list(item for item in d1r if item not in d6r)
+
+    d2_1 = list(item for item in d2r if item not in d1r)
+    d2_3 = list(item for item in d2r if item not in d3r)
+    d2_4 = list(item for item in d2r if item not in d4r)
+    d2_5 = list(item for item in d2r if item not in d5r)
+    d2_6 = list(item for item in d2r if item not in d6r)
+
+    d3_1 = list(item for item in d3r if item not in d1r)
+    d3_2 = list(item for item in d3r if item not in d2r)
+    d3_4 = list(item for item in d3r if item not in d4r)
+    d3_5 = list(item for item in d3r if item not in d5r)
+    d3_6 = list(item for item in d3r if item not in d6r)
+
+    d4_1 = list(item for item in d4r if item not in d1r)
+    d4_2 = list(item for item in d4r if item not in d2r)
+    d4_3 = list(item for item in d4r if item not in d3r)
+    d4_5 = list(item for item in d4r if item not in d5r)
+    d4_6 = list(item for item in d4r if item not in d6r)
+
+    d5_1 = list(item for item in d5r if item not in d1r)
+    d5_2 = list(item for item in d5r if item not in d2r)
+    d5_3 = list(item for item in d5r if item not in d3r)
+    d5_4 = list(item for item in d5r if item not in d4r)
+    d5_6 = list(item for item in d5r if item not in d6r)
+
+    d6_1 = list(item for item in d6r if item not in d1r)
+    d6_2 = list(item for item in d6r if item not in d2r)
+    d6_3 = list(item for item in d6r if item not in d3r)
+    d6_4 = list(item for item in d6r if item not in d4r)
+    d6_5 = list(item for item in d6r if item not in d5r)
+
+    d_complete = []
+    if do_cdl:
+        d_complete.extend(list(item for item in d1r if item not in d_complete))
+    if do_gds:
+        d_complete.extend(list(item for item in d2r if item not in d_complete))
+    if do_lef:
+        d_complete.extend(list(item for item in d3r if item not in d_complete))
+    if do_mag:
+        d_complete.extend(list(item for item in d4r if item not in d_complete))
+    if do_maglef:
+        d_complete.extend(list(item for item in d5r if item not in d_complete))
+    if do_verilog:
+        d_complete.extend(list(item for item in d6r if item not in d_complete))
+
+    d_all = d_complete
+    if do_cdl:
+        d_all = list(item for item in d_all if item in d1r)
+    if do_gds:
+        d_all = list(item for item in d_all if item in d2r)
+    if do_lef:
+        d_all = list(item for item in d_all if item in d3r)
+    if do_mag:
+        d_all = list(item for item in d_all if item in d4r)
+    if do_maglef:
+        d_all = list(item for item in d_all if item in d5r)
+    if do_verilog:
+        d_all = list(item for item in d_all if item in d6r)
+
+    d_notall = list(item for item in d_complete if item not in d_all)
+
+    d_all.sort()
+    d_complete.sort()
+    d_notall.sort()
+    
+    if debug:
+        print('Selected styles option: ' + ','.join(styles))
+        print('Selected formats option: ' + ','.join(formats))
+        print('\nd_complete = ' + ','.join(d_complete))
+        print('\nd_notall = ' + ','.join(d_notall) + '\n')
+
+    print('Library file type cross-correlation:' + '\n')
+
+    if 'allgood' in styles:
+        print('Cells appearing in all libraries:')
+        for cell in d_all.sort():
+           print(cell)
+
+    if 'cross' in styles:
+        # Print which cells appear in one format but not in another, for all format pairs
+        if do_cdl:
+            print('')
+            if do_gds and len(d1_2) > 0:
+                print('Cells appearing in cdl/ but not in gds/:')
+                for cell in d1_2:
+                    print(cell)
+            if do_lef and len(d1_3) > 0:
+                print('Cells appearing in cdl/ but not in lef/:')
+                for cell in d1_3:
+                    print(cell)
+            if do_mag and len(d1_4) > 0:
+                print('Cells appearing in cdl/ but not in mag/:')
+                for cell in d1_4:
+                    print(cell)
+            if do_maglef and len(d1_5) > 0:
+                print('Cells appearing in cdl/ but not in maglef/:')
+                for cell in d1_5:
+                    print(cell)
+            if do_verilog and len(d1_6) > 0:
+                print('Cells appearing in cdl/ but not in verilog/:')
+                for cell in d1_6:
+                    print(cell)
+
+        if do_gds:
+            print('')
+            if do_cdl and len(d2_1) > 0:
+                print('Cells appearing in gds/ but not in cdl/:')
+                for cell in d2_1:
+                    print(cell)
+            if do_lef and len(d2_3) > 0:
+                print('Cells appearing in gds/ but not in lef/:')
+                for cell in d2_3:
+                    print(cell)
+            if do_mag and len(d2_4) > 0:
+                print('Cells appearing in gds/ but not in mag/:')
+                for cell in d2_4:
+                    print(cell)
+            if do_maglef and len(d2_5) > 0:
+                print('Cells appearing in gds/ but not in maglef/:')
+                for cell in d2_5:
+                    print(cell)
+            if do_verilog and len(d2_6) > 0:
+                print('Cells appearing in gds/ but not in verilog/:')
+                for cell in d2_6:
+                    print(cell)
+
+        if do_lef:
+            print('')
+            if do_cdl and len(d3_1) > 0:
+                print('Cells appearing in lef/ but not in cdl/:')
+                for cell in d3_1:
+                    print(cell)
+            if do_gds and len(d3_2) > 0:
+                print('Cells appearing in lef/ but not in gds/:')
+                for cell in d3_2:
+                    print(cell)
+            if do_mag and len(d3_4) > 0:
+                print('Cells appearing in lef/ but not in mag/:')
+                for cell in d3_4:
+                    print(cell)
+            if do_maglef and len(d3_5) > 0:
+                print('Cells appearing in lef/ but not in maglef/:')
+                for cell in d3_5:
+                    print(cell)
+            if do_verilog and len(d3_6) > 0:
+                print('Cells appearing in lef/ but not in verilog/:')
+                for cell in d3_6:
+                    print(cell)
+
+        if do_mag:
+            print('')
+            if do_cdl and len(d4_1) > 0:
+                print('Cells appearing in mag/ but not in cdl/:')
+                for cell in d4_1:
+                    print(cell)
+            if do_gds and len(d4_2) > 0:
+                print('Cells appearing in mag/ but not in gds/:')
+                for cell in d4_2:
+                    print(cell)
+            if do_lef and len(d4_3) > 0:
+                print('Cells appearing in mag/ but not in lef/:')
+                for cell in d4_3:
+                    print(cell)
+            if do_maglef and len(d4_5) > 0:
+                print('Cells appearing in mag/ but not in maglef/:')
+                for cell in d4_5:
+                    print(cell)
+            if do_verilog and len(d4_6) > 0:
+                print('Cells appearing in mag/ but not in verilog/:')
+                for cell in d4_6:
+                    print(cell)
+
+        if do_maglef:
+            print('')
+            if do_cdl and len(d5_1) > 0:
+                print('Cells appearing in maglef/ but not in cdl/:')
+                for cell in d5_1:
+                    print(cell)
+            if do_gds and len(d5_2) > 0:
+                print('Cells appearing in maglef/ but not in gds/:')
+                for cell in d5_2:
+                    print(cell)
+            if do_lef and len(d5_3) > 0:
+                print('Cells appearing in maglef/ but not in lef/:')
+                for cell in d5_3:
+                    print(cell)
+            if do_mag and len(d5_4) > 0:
+                print('Cells appearing in maglef/ but not in mag/:')
+                for cell in d5_4:
+                    print(cell)
+            if do_verilog and len(d5_6) > 0:
+                print('Cells appearing in maglef/ but not in verilog/:')
+                for cell in d5_6:
+                    print(cell)
+        
+        if do_verilog:
+            print('')
+            if do_cdl and len(d6_1) > 0:
+                print('Cells appearing in verilog/ but not in cdl/:')
+                for cell in d6_1:
+                    print(cell)
+            if do_gds and len(d6_2) > 0:
+                print('Cells appearing in verilog/ but not in gds/:')
+                for cell in d6_2:
+                    print(cell)
+            if do_lef and len(d6_3) > 0:
+                print('Cells appearing in verilog/ but not in lef/:')
+                for cell in d6_3:
+                    print(cell)
+            if do_mag and len(d6_4) > 0:
+                print('Cells appearing in verilog/ but not in mag/:')
+                for cell in d6_4:
+                    print(cell)
+            if do_maglef and len(d6_5) > 0:
+                print('Cells appearing in verilog/ but not in maglef/:')
+                for cell in d6_5:
+                    print(cell)
+
+    if 'cell' in styles:
+        # Print one cell per row, with list of formats per cell
+        for cell in d_complete:
+            informats = []
+            if do_cdl and cell in d1r:
+                informats.append('CDL')
+            if do_gds and cell in d2r:
+                informats.append('GDS')
+            if do_lef and cell in d3r:
+                informats.append('LEF')
+            if do_mag and cell in d4r:
+                informats.append('mag')
+            if do_maglef and cell in d5r:
+                informats.append('maglef')
+            if do_verilog and cell in d6r:
+                informats.append('verilog')
+            print(cell + ': ' + ','.join(informats))
+
+    if 'notcell' in styles:
+        # Print one cell per row, with list of missing formats per cell
+        for cell in d_complete:
+            informats = []
+            if do_cdl and cell not in d1r:
+                informats.append('CDL')
+            if do_gds and cell not in d2r:
+                informats.append('GDS')
+            if do_lef and cell not in d3r:
+                informats.append('LEF')
+            if do_mag and cell not in d4r:
+                informats.append('mag')
+            if do_maglef and cell not in d5r:
+                informats.append('maglef')
+            if do_verilog and cell not in d6r:
+                informats.append('verilog')
+            print(cell + ': ' + ','.join(informats))
+
+    if 'table' in styles:
+        cellnamelen = 0
+        for cell in d_complete:
+            if len(cell) > cellnamelen:
+                cellnamelen = len(cell)
+
+        # Print one cell per row, with list of formats per cell in tabular form
+        outline = 'cell'
+        outline += ' ' * (cellnamelen - 5)
+        fmtspc = 0
+        if do_cdl:
+            outline += ' CDL'
+            fmtspc += 4
+        if do_gds:
+            outline += ' GDS'
+            fmtspc += 4
+        if do_lef:
+            outline += ' LEF'
+            fmtspc += 4
+        if do_mag:
+            outline += ' mag'
+            fmtspc += 4
+        if do_maglef:
+            outline += ' maglef'
+            fmtspc += 7
+        if do_verilog:
+            outline += ' verilog'
+            fmtspc += 8
+        print(outline)
+        print('-' * (cellnamelen + fmtspc))
+        for cell in d_complete:
+            informats = []
+            outline = cell
+            outline += ' ' * (cellnamelen - len(cell))
+            if do_cdl:
+                if cell in d1r:
+                    outline += ' X  '
+                else:
+                    outline += '    '
+            if do_gds:
+                if cell in d2r:
+                    outline += ' X  '
+                else:
+                    outline += '    '
+            if do_lef:
+                if cell in d3r:
+                    outline += ' X  '
+                else:
+                    outline += '    '
+            if do_mag:
+                if cell in d4r:
+                    outline += ' X  '
+                else:
+                    outline += '    '
+            if do_maglef:
+                if cell in d5r:
+                    outline += ' X     '
+                else:
+                    outline += '       '
+            if do_verilog:
+                if cell in d6r:
+                    outline += ' X'
+                else:
+                    outline += '  '
+            print(outline)
+        print('-' * (cellnamelen + fmtspc))
+
+def usage():
+    print('compare_dirs.py <path_to_dir> [-styles=<style_list>] [-debug] [-formats=<format_list>|"all"]')
+    print('    <format_list>:  Comma-separated list of one or more of the following formats:')
+    print('             cdl, gds, lef, verilog, mag, maglef')
+    print('    <style_list>: Comma-separated list of one or more of the following styles:')
+    print('             allgood, cross, cell, notcell, table')
+    return 0
+
+if __name__ == '__main__':
+
+    options = []
+    arguments = []
+    for item in sys.argv[1:]:
+        if item.find('-', 0) == 0:
+            options.append(item)
+        else:
+            arguments.append(item)
+
+    if len(arguments) < 1:
+        print("Not enough options given to compare_dirs.py.")
+        usage()
+        sys.exit(0)
+
+    debug = True if '-debug' in options else False
+
+    allformats = ['cdl', 'gds', 'lef', 'mag', 'maglef', 'verilog']
+    allstyles = ['allgood', 'cross', 'cell', 'notcell', 'table']
+
+    formats = allformats
+    styles = ['table']
+
+    for option in options:
+        if '=' in option:
+            optpair = option.split('=')
+            if optpair[0] == '-styles' or optpair[0] == '-style':
+                if optpair[1] == 'all':
+                    styles = allstyles
+                else:
+                    styles = optpair[1].split(',')
+            elif optpair[0] == '-formats' or optpair[0] == '-format':
+                if optpair[1] == 'all':
+                    formats = allformats
+                else:
+                    formats = optpair[1].split(',')
+
+    path = arguments[0]
+    compare_dirs(path, styles, formats, debug)
+    sys.exit(0)
diff --git a/common/consoletext.py b/common/consoletext.py
new file mode 100755
index 0000000..03276fb
--- /dev/null
+++ b/common/consoletext.py
@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+#
+#--------------------------------------------------------
+"""
+  consoletext --- extends tkinter class Text
+  with stdout and stderr redirection.
+"""
+#--------------------------------------------------------
+# Written by Tim Edwards
+# efabless, inc.
+# September 11, 2016
+# Version 0.1
+#--------------------------------------------------------
+
+import sys
+import tkinter
+
+class ConsoleText(tkinter.Text):
+    linelimit = 500
+    class IORedirector(object):
+        '''A general class for redirecting I/O to this Text widget.'''
+        def __init__(self,text_area):
+            self.text_area = text_area
+
+    class StdoutRedirector(IORedirector):
+        '''A class for redirecting stdout to this Text widget.'''
+        def write(self,str):
+            self.text_area.write(str,False)
+
+    class StderrRedirector(IORedirector):
+        '''A class for redirecting stderr to this Text widget.'''
+        def write(self,str):
+            self.text_area.write(str,True)
+
+    def __init__(self, master=None, cnf={}, **kw):
+        '''See the __init__ for Tkinter.Text.'''
+
+        tkinter.Text.__init__(self, master, cnf, **kw)
+
+        self.tag_configure('stdout',background='white',foreground='black')
+        self.tag_configure('stderr',background='white',foreground='red')
+        # None of these works!  Cannot change selected text background!
+        self.config(selectbackground='blue', selectforeground='white')
+        self.tag_configure('sel',background='blue',foreground='white')
+
+    def write(self, val, is_stderr=False):
+        lines = int(self.index('end-1c').split('.')[0])
+        if lines > self.linelimit:
+            self.delete('1.0', str(lines - self.linelimit) + '.0')
+        self.insert('end',val,'stderr' if is_stderr else 'stdout')
+        self.see('end')
+
+    def limit(self, val):
+        self.linelimit = val
diff --git a/common/fixspice.py b/common/fixspice.py
new file mode 100755
index 0000000..a12ae42
--- /dev/null
+++ b/common/fixspice.py
@@ -0,0 +1,348 @@
+#!/bin/env python3
+#
+# fixspice ---
+#
+# This script fixes problems in SPICE models to make them ngspice-compatible.
+# The methods searched and corrected in this file correspond to ngspice
+# version 30.
+#
+# This script is a filter to be run by setting the name of this script as
+# the value to "filter=" for the model install in the PDK Makefile in
+# open_pdks.
+#
+# This script converted from the bash script by Risto Bell, with improvements.
+#
+# This script is minimally invasive to the original SPICE file, making changes
+# while preserving comments and line continuations.  In order to properly parse
+# the file, comments and line continuations are recorded and removed from the
+# file contents, then inserted again before the modified file is written.
+
+import re
+import os
+import sys
+import textwrap
+
+def filter(inname, outname, debug=False):
+    notparsed = []
+
+    # Read input.  Note that splitlines() performs the additional fix of
+    # correcting carriage-return linefeed (CRLF) line endings.
+    try:
+        with open(inname, 'r') as inFile:
+            spitext = inFile.read()
+    except:
+        print('fixspice.py: failed to open ' + inname + ' for reading.', file=sys.stderr)
+        return 1
+    else:
+        if debug:
+            print('Fixing ngspice incompatibilities in file ' + inname + '.')
+
+    # Due to the complexity of comment lines embedded within continuation lines,
+    # the result needs to be processed line by line.  Blank lines and comment
+    # lines are removed from the text, replaced with tab characters, and collected
+    # in a separate array.  Then the continuation lines are unfolded, and each
+    # line processed.  Then it is all put back together at the end.
+
+    # First replace all tabs with spaces so we can use tabs as markers.
+    spitext = spitext.replace('\t', '    ')
+
+    # Now do an initial line split
+    spilines = spitext.splitlines()
+
+    # Search lines for comments and blank lines and replace them with tabs
+    # Replace continuation lines with tabs and preserve the position.
+    spitext = ''
+    for line in spilines:
+        if len(line) == 0:
+            notparsed.append('\n')
+            spitext += '\t '
+        elif line[0] == '*':
+            notparsed.append('\n' + line)
+            spitext += '\t '
+        elif line[0] == '+':
+            notparsed.append('\n+')
+            spitext += '\t ' + line[1:]
+        else:
+            spitext += '\n' + line
+
+    # Now split back into an array of lines
+    spilines = spitext.splitlines()
+
+    # Process input with regexp
+
+    fixedlines = []
+    modified = False
+
+    # Regular expression to find 'agauss(a,b,c)' lines and record a, b, and c
+    grex = re.compile('[^{]agauss\(([^,]*),([^,]*),([^)]*)\)', re.IGNORECASE)
+
+    # Regular expression to determine if the line is a .PARAM card    
+    paramrex = re.compile('^\.param', re.IGNORECASE)
+    # Regular expression to determine if the line is a .MODEL card    
+    modelrex = re.compile('^\.model', re.IGNORECASE)
+    # Regular expression to detect a .SUBCKT card
+    subcktrex = re.compile('^\.subckt', re.IGNORECASE)
+
+    for line in spilines:
+        devtype = line[0].upper() if len(line) > 0 else 0
+
+        # NOTE:  All filter functions below take variable fixedline, alter it, then
+        # set fixedline to the altered text for the next filter function.
+
+        fixedline = line
+
+        # Fix: Wrap "agauss(...)" in brackets and remove single quotes around expressions
+        # Example:
+        #    before: + SD_DN_CJ=agauss(7.900e-04,'1.580e-05*__LOT__',1)   dn_cj=SD_DN_CJ"
+        #    after:  + SD_DN_CJ={agauss(7.900e-04,1.580e-05*__LOT__,1)}   dn_cj=SD_DN_CJ"
+
+        # for gmatch in grex.finditer(fixedline):
+        while True:
+            gmatch = grex.search(fixedline)
+            if gmatch:
+                fixpart1 = gmatch.group(1).strip("'")
+                fixpart2 = gmatch.group(2).strip("'")
+                fixpart3 = gmatch.group(3).strip("'")
+                fixedline = fixedline[0:gmatch.span(0)[0] + 1] + '{agauss(' + fixpart1 + ',' + fixpart2 + ',' + fixpart3 + ')}' + fixedline[gmatch.span(0)[1]:]
+                if debug:
+                    print('Fixed agauss() call.')
+            else:
+                break
+
+        # Fix: Check for "dtemp=dtemp" and remove unless in a .param line
+        pmatch = paramrex.search(fixedline)
+        if not pmatch:
+            altered = re.sub(' dtemp=dtemp', ' ', fixedline, flags=re.IGNORECASE)
+            if altered != fixedline:
+                fixedline = altered
+                if debug:
+                    print('Removed dtemp=dtemp from instance call')
+
+        # Fixes related to .MODEL cards:
+
+        mmatch = modelrex.search(fixedline)
+        if mmatch:
+
+            modeltype = fixedline.split()[2].lower()
+
+            if modeltype == 'nmos' or modeltype == 'pmos':
+
+                # Fixes related specifically to MOS models:
+
+                # Fix: Look for hspver=98.2 in FET model
+                altered = re.sub(' hspver[ ]*=[ ]*98\.2', ' ', fixedline, flags=re.IGNORECASE)
+                if altered != fixedline:
+                    fixedline = altered
+                    if debug:
+                        print('Removed hspver=98.2 from ' + modeltype + ' model')
+
+                # Fix:  Change level 53 FETs to level 49
+                altered = re.sub(' (level[ ]*=[ ]*)53', ' \g<1>49', fixedline, flags=re.IGNORECASE)
+                if altered != fixedline:
+                    fixedline = altered
+                    if debug:
+                        print('Changed level 53 ' + modeltype + ' to level 49')
+
+                # Fix: Look for version=4.3 or 4.5 FETs, change to 4.8.0 per recommendations
+                altered = re.sub(' (version[ ]*=[ ]*)4\.[35]', ' \g<1>4.8.0',
+					fixedline, flags=re.IGNORECASE)
+                if altered != fixedline:
+                    fixedline = altered
+                    if debug:
+                        print('Changed version 4.3/4.5 ' + modeltype + ' to version 4.8.0')
+    
+                # Fix: Look for mulu0= (NOTE:  Might be supported for bsim4?)
+                altered = re.sub('mulu0[ ]*=[ ]*[0-9.e+-]*', '', fixedline, flags=re.IGNORECASE)
+                if altered != fixedline:
+                    fixedline = altered
+                    if debug:
+                        print('Removed mulu0= from ' + modeltype + ' model')
+
+                # Fix: Look for apwarn=
+                altered = re.sub(' apwarn[ ]*=[ ]*[0-9.e+-]*', ' ', fixedline, flags=re.IGNORECASE)
+                if altered != fixedline:
+                    fixedline = altered
+                    if debug:
+                        print('Removed apwarn= from ' + modeltype + ' model')
+
+                # Fix: Look for lmlt=
+                altered = re.sub(' lmlt[ ]*=[ ]*[0-9.e+-]*', ' ', fixedline, flags=re.IGNORECASE)
+                if altered != fixedline:
+                    fixedline = altered
+                    if debug:
+                        print('Removed lmlt= from ' + modeltype + ' model')
+
+                # Fix: Look for nf=
+                altered = re.sub(' nf[ ]*=[ ]*[0-9.e+-]*', ' ', fixedline, flags=re.IGNORECASE)
+                if altered != fixedline:
+                    fixedline = altered
+                    if debug:
+                        print('Removed nf= from ' + modeltype + ' model')
+
+                # Fix: Look for sa/b/c/d/=
+                altered = re.sub(' s[abcd][ ]*=[ ]*[0-9.e+-]*', ' ', fixedline, flags=re.IGNORECASE)
+                if altered != fixedline:
+                    fixedline = altered
+                    if debug:
+                        print('Removed s[abcd]= from ' + modeltype + ' model')
+
+                # Fix: Look for binflag= in MOS .MODEL
+                altered = re.sub(' binflag[ ]*=[ ]*[0-9.e+-]*', ' ', fixedline, flags=re.IGNORECASE)
+                if altered != fixedline:
+                    fixedline = altered
+                    if debug:
+                        print('Removed binflag= from ' + modeltype + ' model')
+
+                # Fix: Look for wref, lref= in MOS .MODEL (note:  could be found in other models?)
+                altered = re.sub(' [wl]ref[ ]*=[ ]*[0-9.e+-]*', ' ', fixedline, flags=re.IGNORECASE)
+                if altered != fixedline:
+                    fixedline = altered
+                    if debug:
+                        print('Removed lref= from MOS .MODEL')
+
+            # TREF is a known issue for (apparently?) all device types
+            # Fix: Look for tref= in .MODEL
+            altered = re.sub(' tref[ ]*=[ ]*[0-9.e+-]*', ' ', fixedline, flags=re.IGNORECASE)
+            if altered != fixedline:
+                fixedline = altered
+                if debug:
+                    print('Removed tref= from ' + modeltype + ' model')
+
+            # Fix: Look for double-dot model binning and replace with single dot
+            altered = re.sub('\.\.([0-9]+)', '.\g<1>', fixedline, flags=re.IGNORECASE)
+            if altered != fixedline:
+                fixedline = altered
+                if debug:
+                    print('Collapsed double-dot model binning.')
+
+        # Various deleted parameters above may appear in instances, so those must be
+        # caught as well.  Need to catch expressions and variables in addition to the
+        # usual numeric assignments.
+
+        if devtype == 'M':
+            altered = re.sub(' nf=[^ \'\t]+', ' ', fixedline, flags=re.IGNORECASE)
+            altered = re.sub(' nf=\'[^\'\t]+\'', ' ', altered, flags=re.IGNORECASE)
+            if altered != fixedline:
+                fixedline = altered
+                if debug:
+                    print('Removed nf= from MOSFET device instance')
+
+            altered = re.sub(' mulu0=[^ \'\t]+', ' ', fixedline, flags=re.IGNORECASE)
+            altered = re.sub(' mulu0=\'[^\'\t]+\'', ' ', altered, flags=re.IGNORECASE)
+            if altered != fixedline:
+                fixedline = altered
+                if debug:
+                    print('Removed mulu0= from MOSFET device instance')
+
+            altered = re.sub(' s[abcd]=[^ \'\t]+', ' ', fixedline, flags=re.IGNORECASE)
+            altered = re.sub(' s[abcd]=\'[^\'\t]+\'', ' ', altered, flags=re.IGNORECASE)
+            if altered != fixedline:
+                fixedline = altered
+                if debug:
+                    print('Removed s[abcd]= from MOSFET device instance')
+
+        # Remove tref= from all device type instances
+        altered = re.sub(' tref=[^ \'\t]+', ' ', fixedline, flags=re.IGNORECASE)
+        altered = re.sub(' tref=\'[^\'\t]+\'', ' ', altered, flags=re.IGNORECASE)
+        if altered != fixedline:
+            fixedline = altered
+            if debug:
+                print('Removed tref= from device instance')
+
+        # Check for use of ".subckt ...  <name>=l" (or <name>=w) with no antecedent
+        # for 'w' or 'l'.  It is the responsibility of the technology file for extraction
+        # to produce the correct name to pass to the subcircuit for length or width.
+
+        smatch = subcktrex.match(fixedline)
+        if smatch:
+            altered = fixedline
+            if fixedline.lower().endswith('=l'):
+                if ' l=' not in fixedline.lower():
+                    altered=re.sub( '=l$', '=0', fixedline, flags=re.IGNORECASE)
+            elif '=l ' in fixedline.lower():
+                if ' l=' not in fixedline.lower():
+                    altered=re.sub( '=l ', '=0 ', altered, flags=re.IGNORECASE)
+            if altered != fixedline:
+                fixedline = altered
+                if debug:
+                    print('Replaced use of "l" with no definition in .subckt line')
+
+            altered = fixedline
+            if fixedline.lower().endswith('=w'):
+                if ' w=' not in fixedline.lower():
+                    altered=re.sub( '=w$', '=0', fixedline, flags=re.IGNORECASE)
+            elif '=w ' in fixedline.lower():
+                if ' w=' not in fixedline.lower():
+                    altered=re.sub( '=w ', '=0 ', altered, flags=re.IGNORECASE)
+            if altered != fixedline:
+                fixedline = altered
+                if debug:
+                    print('Replaced use of "w" with no definition in .subckt line')
+
+        fixedlines.append(fixedline)
+        if fixedline != line:
+            modified = True
+
+    # Reinsert embedded comments and continuation lines
+    if debug:
+        print('Reconstructing output')
+    olines = []
+    for line in fixedlines:
+        while '\t ' in line:
+            line = line.replace('\t ', notparsed.pop(0), 1)
+        olines.append(line)
+
+    fixedlines = '\n'.join(olines).strip()
+    olines = fixedlines.splitlines()
+
+    # Write output
+    if debug:
+        print('Writing output')
+    if outname == None:
+        for line in olines:
+            print(line)
+    else:
+        # If the output is a symbolic link but no modifications have been made,
+        # then leave it alone.  If it was modified, then remove the symbolic
+        # link before writing.
+        if os.path.islink(outname):
+            if not modified:
+                return 0
+            else:
+                os.unlink(outname)
+        try:
+            with open(outname, 'w') as outFile:
+                for line in olines:
+                    print(line, file=outFile)
+        except:
+            print('fixspice.py: failed to open ' + outname + ' for writing.', file=sys.stderr)
+            return 1
+
+
+if __name__ == '__main__':
+
+    # This script expects to get one or two arguments.  One argument is
+    # mandatory and is the input file.  The other argument is optional and
+    # is the output file.  The output file and input file may be the same
+    # name, in which case the original input is overwritten.
+
+    options = []
+    arguments = []
+    for item in sys.argv[1:]:
+        if item.find('-', 0) == 0:
+            options.append(item[1:])
+        else:
+            arguments.append(item)
+
+    if len(arguments) > 0:
+        infilename = arguments[0]
+
+    if len(arguments) > 1:
+        outfilename = arguments[1]
+    else:
+        outfilename = None
+
+    debug = True if 'debug' in options else False
+
+    result = filter(infilename, outfilename, debug)
+    sys.exit(result)
diff --git a/common/foundry_install.py b/common/foundry_install.py
new file mode 100755
index 0000000..2067663
--- /dev/null
+++ b/common/foundry_install.py
@@ -0,0 +1,2376 @@
+#!/usr/bin/env python3
+#
+# foundry_install.py
+#
+# This file generates the local directory structure and populates the
+# directories with foundry vendor data.  The local directory (target)
+# should be a staging area, not a place where files are kept permanently.
+#
+# Options:
+#    -ef_format		Use efabless naming (libs.ref/techLEF),
+#			otherwise use generic naming (libs.tech/lef)
+#    -clean		Clear out and remove target directory before starting
+#    -source <path>	Path to source data top level directory
+#    -target <path>	Path to target (staging) top level directory
+#
+# All other options represent paths to vendor files.  They may all be
+# wildcarded with "*", or with specific escapes like "%l" for library
+# name or "%v" for version number (see below for a complete list of escape
+# sequences).
+#
+# Note only one of "-spice" or "-cdl" need be specified.  Since the
+# open source tools use ngspice, CDL files are converted to ngspice
+# syntax when needed.
+#
+#	-techlef <path>	Path to technology LEF file
+#	-doc <path>	Path to technology documentation
+#	-lef <path>	Path to LEF file
+#	-spice <path>	Path to SPICE netlists
+#	-cdl <path>	Path to CDL netlists
+#	-models <path>	Path to SPICE (primitive device) models
+#	-liberty <path>	Path to Liberty timing files
+#	-gds <path>	Path to GDS data
+#	-verilog <path>	Path to verilog models
+#
+#	-library <type> <name> [<target>]	See below
+#
+# For the "-library" option, any number of libraries may be supported, and
+# one "-library" option should be provided for each supported library.
+# <type> is one of:  "digital", "primitive", or "general".  Analog and I/O
+# libraries fall under the category "general", as they are all treated the
+# same way.  <name> is the vendor name of the library.  [<target>] is the
+# (optional) local name of the library.  If omitted, then the vendor name
+# is used for the target (there is no particular reason to specify a
+# different local name for a library).
+#
+# In special cases using options (see below), path may be "-", indicating
+# that there are no source files, but only to run compilations or conversions
+# on the files in the target directory.
+#
+# All options "-lef", "-spice", etc., can take the additional arguments
+# 	up  <number>
+#
+# to indicate that the source hierarchy should be copied from <number>
+# levels above the files.  For example, if liberty files are kept in
+# multiple directories according to voltage level, then
+#
+# 	-liberty x/y/z/PVT_*/*.lib
+#
+# would install all .lib files directly into libs.ref/<libname>/liberty/*.lib
+# (if "-ef_format" option specified, then: libs.ref/<libname>/liberty/*.lib)
+# while
+#
+# 	-liberty x/y/z/PVT_*/*.lib up 1
+#
+# would install all .lib files into libs.ref/liberty/<libname>/PVT_*/*.lib
+# (if "-ef_format" option specified, then: libs.ref/<libname>/liberty/PVT_*/*.lib)
+#
+# Please note that the INSTALL variable in the Makefile starts with "set -f"
+# to suppress the OS from doing wildcard substitution;  otherwise the
+# wildcards in the install options will get expanded by the OS before
+# being passed to the install script.
+#
+# Other library-specific arguments are:
+#
+#	nospec	:  Remove timing specification before installing
+#		    (used with verilog files;  needs to be extended to
+#		    liberty files)
+#	compile :  Create a single library from all components.  Used
+#		    when a foundry library has inconveniently split
+#		    an IP library (LEF, CDL, verilog, etc.) into
+#		    individual files.
+#	stub :	   Remove contents of subcircuits from CDL or SPICE
+#		    netlist files.
+#
+#	priv :	   Mark the contents being installed as privleged, and
+#		    put them in a separate root directory libs.priv
+#		    where they can be given additional read/write
+#		    restrictions.
+#
+#	exclude :  Followed by "=" and a comma-separated list of names.
+#		    exclude these files/modules/subcircuits.  Names may
+#		    also be wildcarded in "glob" format.
+#
+#	rename :   Followed by "=" and an alternative name.  For any
+#		    file that is a single entry, change the name of
+#		    the file in the target directory to this (To-do:
+#		    take regexps for multiple files).  When used with
+#		    "compile" or "compile-only", this refers to the
+# 		    name of the target compiled file.
+#
+#	noconvert : Install only; do not attempt to convert to other
+#		    formats (applies only to GDS, CDL, and LEF).
+#
+# NOTE:  This script can be called once for all libraries if all file
+# types (gds, cdl, lef, etc.) happen to all work with the same wildcards.
+# However, it is more likely that it will be called several times for the
+# same PDK, once to install I/O cells, once to install digital, and so
+# forth, as made possible by the wild-carding.
+
+import re
+import os
+import sys
+import glob
+import stat
+import shutil
+import fnmatch
+import subprocess
+
+def usage():
+    print("foundry_install.py [options...]")
+    print("   -copy             Copy files from source to target (default)")
+    print("   -ef_format        Use efabless naming conventions for local directories")
+    print("")
+    print("   -source <path>    Path to top of source directory tree")
+    print("   -target <path>    Path to top of target directory tree")
+    print("")
+    print("   -techlef <path>   Path to technology LEF file")
+    print("   -doc <path>       Path to technology documentation")
+    print("   -lef <path>       Path to LEF file")
+    print("   -spice <path>     Path to SPICE netlists")
+    print("   -cdl <path>       Path to CDL netlists")
+    print("   -models <path>    Path to SPICE (primitive device) models")
+    print("   -lib <path>       Path to Liberty timing files")
+    print("   -liberty <path>       Path to Liberty timing files")
+    print("   -gds <path>       Path to GDS data")
+    print("   -verilog <path>   Path to verilog models")
+    print("   -library <type> <name> [<target>]	 See below")
+    print("")
+    print(" All <path> names may be wild-carded with '*' ('glob'-style wild-cards)")
+    print("")
+    print(" All options with <path> other than source and target may take the additional")
+    print(" arguments 'up <number>', where <number> indicates the number of levels of")
+    print(" hierarchy of the source path to include when copying to the target.")
+    print("")
+    print(" Library <type> may be one of:")
+    print("    digital		Digital standard cell library")
+    print("    primitive	Primitive device library")
+    print("    general		All other library types (I/O, analog, etc.)")
+    print("")
+    print(" If <target> is unspecified then <name> is used for the target.")
+
+# Return a list of files after glob-style substituting into pathname.  This
+# mostly relies on glob.glob(), but uses the additional substitutions with
+# escape strings:
+#
+#   %v :  Match a version number in the form "major[.minor[.rev]]"
+#   %l :  substitute the library name
+#   %% :  substitute the percent character verbatim
+
+from distutils.version import LooseVersion
+
+#----------------------------------------------------------------------------
+#----------------------------------------------------------------------------
+
+def makeuserwritable(filepath):
+    if os.path.exists(filepath):
+        st = os.stat(filepath)
+        os.chmod(filepath, st.st_mode | stat.S_IWUSR)
+
+#----------------------------------------------------------------------------
+#----------------------------------------------------------------------------
+
+def substitute(pathname, library):
+    if library:
+        # Do %l substitution
+        newpathname = re.sub('%l', library, pathname)
+    else:
+        newpathname = pathname
+
+    if '%v' in newpathname:
+        vglob = re.sub('%v.*', '*', newpathname)
+        vlibs = glob.glob(vglob)
+        try:
+            vstr = vlibs[0][len(vglob)-1:]
+        except IndexError:
+            pass
+        else:
+            for vlib in vlibs[1:]:
+                vtest = vlib[len(vglob)-1:]
+                if LooseVersion(vtest) > LooseVersion(vstr):
+                    vstr = vtest
+            newpathname = re.sub('%v', vstr, newpathname)
+
+    if '%%' in newpathname:
+        newpathname = re.sub('%%', '%', newpathname)
+
+    return newpathname
+
+#----------------------------------------------------------------------------
+#----------------------------------------------------------------------------
+
+def get_gds_properties(magfile):
+    proprex = re.compile('^[ \t]*string[ \t]+(GDS_[^ \t]+)[ \t]+([^ \t]+)$')
+    proplines = []
+    if os.path.isfile(magfile):
+        with open(magfile, 'r') as ifile:
+            magtext = ifile.read().splitlines()
+            for line in magtext:
+                lmatch = proprex.match(line)
+                if lmatch:
+                    propline = lmatch.group(1) + ' ' + lmatch.group(2)
+                    proplines.append(propline)
+    return proplines
+
+#----------------------------------------------------------------------------
+# Read subcircuit ports from a CDL file, given a subcircuit name that should
+# appear in the file as a subcircuit entry, and return a dictionary of ports
+# and their indexes in the subcircuit line.
+#----------------------------------------------------------------------------
+
+def get_subckt_ports(cdlfile, subname):
+    portdict = {}
+    pidx = 1
+    portrex = re.compile('^\.subckt[ \t]+([^ \t]+)[ \t]+(.*)$', flags=re.IGNORECASE)
+    with open(cdlfile, 'r') as ifile:
+        cdltext = ifile.read()
+        cdllines = cdltext.replace('\n+', ' ').splitlines()
+        for line in cdllines:
+            lmatch = portrex.match(line)
+            if lmatch:
+                if lmatch.group(1).lower() == subname.lower():
+                    ports = lmatch.group(2).split()
+                    for port in ports:
+                        portdict[port.lower()] = pidx
+                        pidx += 1
+                    break
+    return portdict
+
+#----------------------------------------------------------------------------
+# Filter a verilog file to remove any backslash continuation lines, which
+# iverilog does not parse.  If targetroot is a directory, then find and
+# process all files in the path of targetroot.  If any file to be processed
+# is unmodified (has no backslash continuation lines), then ignore it.  If
+# any file is a symbolic link and gets modified, then remove the symbolic
+# link before overwriting with the modified file.
+#----------------------------------------------------------------------------
+
+def vfilefilter(vfile):
+    modified = False
+    with open(vfile, 'r') as ifile:
+        vtext = ifile.read()
+
+    # Remove backslash-followed-by-newline and absorb initial whitespace.  It
+    # is unclear what initial whitespace means in this context, as the use-
+    # case that has been seen seems to work under the assumption that leading
+    # whitespace is ignored up to the amount used by the last indentation.
+
+    vlines = re.sub('\\\\\n[ \t]*', '', vtext)
+
+    if vlines != vtext:
+        # File contents have been modified, so if this file was a symbolic
+        # link, then remove it.  Otherwise, overwrite the file with the
+        # modified contents.
+        if os.path.islink(vfile):
+            os.unlink(vfile)
+        with open(vfile, 'w') as ofile:
+            ofile.write(vlines)
+
+#----------------------------------------------------------------------------
+# Run a filter on verilog files that cleans up known syntax issues.
+# This is embedded in the foundry_install script and is not a custom
+# filter largely because the issue is in the tool, not the PDK.
+#----------------------------------------------------------------------------
+
+def vfilter(targetroot):
+    if os.path.isfile(targetroot):
+        vfilefilter(targetroot)
+    else:
+        vlist = glob.glob(targetroot + '/*')
+        for vfile in vlist:
+            if os.path.isfile(vfile):
+                vfilefilter(vfile)
+
+#----------------------------------------------------------------------------
+# For issues that are PDK-specific, a script can be written and put in
+# the PDK's custom/scripts/ directory, and passed to the foundry_install
+# script using the "filter" option.
+#----------------------------------------------------------------------------
+
+def tfilter(targetroot, filterscript, outfile=[]):
+    filterroot = os.path.split(filterscript)[1]
+    if os.path.isfile(targetroot):
+        print('   Filtering file ' + targetroot + ' with ' + filterroot)
+        sys.stdout.flush()
+        if not outfile:
+            outfile = targetroot
+        else:
+            # Make sure this file is writable (as the original may not be)
+            makeuserwritable(outfile)
+
+        fproc = subprocess.run([filterscript, targetroot, outfile],
+			stdin = subprocess.DEVNULL, stdout = subprocess.PIPE,
+			stderr = subprocess.PIPE, universal_newlines = True)
+        if fproc.stdout:
+            for line in fproc.stdout.splitlines():
+                print(line)
+        if fproc.stderr:
+            print('Error message output from filter script:')
+            for line in fproc.stderr.splitlines():
+                print(line)
+
+    else:
+        tlist = glob.glob(targetroot + '/*')
+        for tfile in tlist:
+            if os.path.isfile(tfile):
+                print('   Filtering file ' + tfile + ' with ' + filterroot)
+                sys.stdout.flush()
+                fproc = subprocess.run([filterscript, tfile, tfile],
+			stdin = subprocess.DEVNULL, stdout = subprocess.PIPE,
+			stderr = subprocess.PIPE, universal_newlines = True)
+                if fproc.stdout:
+                    for line in fproc.stdout.splitlines():
+                        print(line)
+                if fproc.stderr:
+                    print('Error message output from filter script:')
+                    for line in fproc.stderr.splitlines():
+                        print(line)
+
+#----------------------------------------------------------------------------
+# Given a destination directory holding individual verilog files of a number
+# of modules, create a single verilog library file named <alllibname> and place
+# it in the same directory.  This is done for the option "compile" if specified
+# for the "-verilog" install.
+#----------------------------------------------------------------------------
+
+def create_verilog_library(destlibdir, destlib, do_compile_only, do_stub, excludelist):
+
+    alllibname = destlibdir + '/' + destlib + '.v'
+    if os.path.isfile(alllibname):
+        os.remove(alllibname)
+
+    print('Diagnostic:  Creating consolidated verilog library ' + destlib + '.v')
+    vlist = glob.glob(destlibdir + '/*.v')
+    if alllibname in vlist:
+        vlist.remove(alllibname)
+
+    # Create exclude list with glob-style matching using fnmatch
+    if len(vlist) > 0:
+        vlistnames = list(os.path.split(item)[1] for item in vlist)
+        notvlist = []
+        for exclude in excludelist:
+            notvlist.extend(fnmatch.filter(vlistnames, exclude))
+
+        # Apply exclude list
+        if len(notvlist) > 0:
+            for file in vlist[:]:
+                if os.path.split(file)[1] in notvlist:
+                    vlist.remove(file)
+
+    if len(vlist) > 1:
+        print('New file is:  ' + alllibname)
+        with open(alllibname, 'w') as ofile:
+            allmodules = []
+            for vfile in vlist:
+                with open(vfile, 'r') as ifile:
+                    # print('Adding ' + vfile + ' to library.')
+                    vtext = ifile.read()
+                    modules = re.findall(r'[ \t\n]module[ \t]+([^ \t\n\(]+)', vtext)
+                    mseen = list(item for item in modules if item in allmodules)
+                    allmodules.extend(list(item for item in modules if item not in allmodules))
+                    vfilter = remove_redundant_modules(vtext, allmodules, mseen)
+                    # NOTE:  The following workaround resolves an issue with iverilog,
+                    # which does not properly parse specify timing paths that are not in
+                    # parentheses.  Easy to work around
+                    vlines = re.sub(r'\)[ \t]*=[ \t]*([01]:[01]:[01])[ \t]*;', r') = ( \1 ) ;', vfilter)
+                    print(vlines, file=ofile)
+                print('\n//--------EOF---------\n', file=ofile)
+
+        if do_compile_only == True:
+            print('Compile-only:  Removing individual verilog files')
+            for vfile in vlist:
+                if os.path.isfile(vfile):
+                    os.remove(vfile)
+                elif os.path.islink(vfile):
+                    os.unlink(vfile)
+    else:
+        print('Only one file (' + str(vlist) + ');  ignoring "compile" option.')
+
+#----------------------------------------------------------------------------
+# Remove redundant module entries from a verilog file.  "m2list" is a list of
+# module names gleaned from all previously read files using re.findall().
+# "mlist" is a list of all module names including those in "ntext".
+# The reason for doing this is that some verilog files may includes modules used
+# by all the files, and if included more than once, then iverilog complains.
+#----------------------------------------------------------------------------
+
+def remove_redundant_modules(ntext, mlist, m2list):
+    updated = ntext
+    for module in mlist:
+        # Determine the number of times the module appears in the text
+        if module in m2list:
+            # This module seen before outside of ntext, so remove all occurrances in ntext
+            new = re.sub(r'[ \t\n]+module[ \t]+' + module + '[ \t\n\(]+.*[ \t\n]endmodule', '\n', updated, flags=re.DOTALL)
+            updated = new
+
+        else:
+            n = len(re.findall(r'[ \t\n]module[ \t]+' + module + '[ \t\n\(]+.*[ \t\n]endmodule', updated, flags=re.DOTALL))
+            # This module defined more than once inside ntext, so remove all but one
+            # Optimization:  Just keep original text if n < 2
+            if n < 2:
+                continue
+
+            # Remove all but one
+            updated = re.sub(r'[ \t\n]+module[ \t]+' + module + '[ \t\n]+.*[ \t\n]endmodule', '\n', n - 1, updated, flags=re.IGNORECASE | re.DOTALL)
+    return updated
+
+#----------------------------------------------------------------------------
+# Given a destination directory holding individual LEF files of a number
+# of cells, create a single LEF library file named <alllibname> and place
+# it in the same directory.  This is done for the option "compile" if specified
+# for the "-lef" install.
+#----------------------------------------------------------------------------
+
+def create_lef_library(destlibdir, destlib, do_compile_only, excludelist):
+
+    alllibname = destlibdir + '/' + destlib + '.lef'
+    if os.path.isfile(alllibname):
+        os.remove(alllibname)
+
+    print('Diagnostic:  Creating consolidated LEF library ' + destlib + '.lef')
+    llist = glob.glob(destlibdir + '/*.lef')
+    if alllibname in llist:
+        llist.remove(alllibname)
+
+    # Create exclude list with glob-style matching using fnmatch
+    if len(llist) > 0:
+        llistnames = list(os.path.split(item)[1] for item in llist)
+        notllist = []
+        for exclude in excludelist:
+            notllist.extend(fnmatch.filter(llistnames, exclude))
+
+        # Apply exclude list
+        if len(notllist) > 0:
+            for file in llist[:]:
+                if os.path.split(file)[1] in notllist:
+                    llist.remove(file)
+
+    if len(llist) > 1:
+        print('New file is:  ' + alllibname)
+        with open(alllibname, 'w') as ofile:
+            headerdone = False
+            for lfile in llist:
+                with open(lfile, 'r') as ifile:
+                    # print('Adding ' + lfile + ' to library.')
+                    ltext = ifile.read()
+                    llines = ltext.splitlines()
+                    headerseen = False
+                    for lline in llines:
+                        if headerdone:
+                            if not headerseen:
+                                if not lline.startswith('MACRO'):
+                                    continue
+                                else:
+                                    headerseen = True
+                        print(lline, file=ofile)
+                    headerdone = True
+                print('#--------EOF---------\n', file=ofile)
+
+        if do_compile_only == True:
+            print('Compile-only:  Removing individual LEF files')
+            for lfile in llist:
+                if os.path.isfile(lfile):
+                    os.remove(lfile)
+            if newname:
+                if os.path.isfile(newname):
+                    os.remove(newname)
+    else:
+        print('Only one file (' + str(llist) + ');  ignoring "compile" option.')
+
+#----------------------------------------------------------------------------
+# Given a destination directory holding individual liberty files of a number
+# of cells, create a single liberty library file named <alllibname> and place
+# it in the same directory.  This is done for the option "compile" if specified
+# for the "-lib" install.
+#----------------------------------------------------------------------------
+
+# Warning:  This script is unfinished.  Needs to parse the library header
+# in each cell and generate a new library header combining the contents of
+# all cell headers.  Also:  The library name in the header needs to be
+# changed to the full library name.  Also:  There is no mechanism for
+# collecting all files belonging to a single process corner/temperature/
+# voltage.
+
+def create_lib_library(destlibdir, destlib, do_compile_only, excludelist):
+
+    alllibname = destlibdir + '/' + destlib + '.lib'
+    if os.path.isfile(alllibname):
+        os.remove(alllibname)
+
+    print('Diagnostic:  Creating consolidated liberty library ' + destlib + '.lib')
+
+    # Create exclude list with glob-style matching using fnmatch
+    if len(llist) > 0:
+        llistnames = list(os.path.split(item)[1] for item in llist)
+        notllist = []
+        for exclude in excludelist:
+            notllist.extend(fnmatch.filter(llistnames, exclude))
+
+        # Apply exclude list
+        if len(notllist) > 0:
+            for file in llist[:]:
+                if os.path.split(file)[1] in notllist:
+                    llist.remove(file)
+
+    if len(llist) > 1:
+        print('New file is:  ' + alllibname)
+        with open(alllibname, 'w') as ofile:
+            headerdone = False
+            for lfile in llist:
+                with open(lfile, 'r') as ifile:
+                    # print('Adding ' + lfile + ' to library.')
+                    ltext = ifile.read()
+                    llines = ltext.splitlines()
+                    headerseen = False
+                    for lline in llines:
+                        if headerdone:
+                            if not headerseen:
+                                if not lline.split()[0] == 'cell':
+                                    continue
+                                else:
+                                    headerseen = True
+                        print(lline, file=ofile)
+                    headerdone = True
+                print('/*--------EOF---------*/\n', file=ofile)
+
+        if do_compile_only == True:
+            print('Compile-only:  Removing individual LEF files')
+            for lfile in llist:
+                if os.path.isfile(lfile):
+                    os.remove(lfile)
+            if newname:
+                if os.path.isfile(newname):
+                    os.remove(newname)
+    else:
+        print('Only one file (' + str(llist) + ');  ignoring "compile" option.')
+
+#----------------------------------------------------------------------------
+# Given a destination directory holding individual GDS files of a number
+# of cells, create a single GDL library file named <alllibname> and place
+# it in the same directory.  This is done for the option "compile" if specified
+# for the "-gds" install.
+#----------------------------------------------------------------------------
+
+def create_gds_library(destlibdir, destlib, startup_script, do_compile_only, excludelist):
+
+    alllibname = destlibdir + '/' + destlib + '.gds'
+    if os.path.isfile(alllibname):
+        os.remove(alllibname)
+
+    print('Diagnostic:  Creating consolidated GDS library ' + destlib + '.gds')
+    glist = glob.glob(destlibdir + '/*.gds')
+    glist.extend(glob.glob(destlibdir + '/*.gdsii'))
+    glist.extend(glob.glob(destlibdir + '/*.gds2'))
+    if alllibname in glist:
+        glist.remove(alllibname)
+
+    # Create exclude list with glob-style matching using fnmatch
+    if len(glist) > 0:
+        glistnames = list(os.path.split(item)[1] for item in glist)
+        notglist = []
+        for exclude in excludelist:
+            notglist.extend(fnmatch.filter(glistnames, exclude))
+
+        # Apply exclude list
+        if len(notglist) > 0:
+            for file in glist[:]:
+                if os.path.split(file)[1] in notglist:
+                    glist.remove(file)
+
+    if len(glist) > 1:
+        print('New file is:  ' + alllibname)
+
+        if os.path.isfile(startup_script):
+            # If the symbolic link exists, remove it.
+            if os.path.isfile(destlibdir + '/.magicrc'):
+                os.remove(destlibdir + '/.magicrc')
+            os.symlink(startup_script, destlibdir + '/.magicrc')
+
+        # A GDS library is binary and requires handling in Magic
+        print('Creating magic generation script to generate GDS library.') 
+        with open(destlibdir + '/generate_magic.tcl', 'w') as ofile:
+            print('#!/usr/bin/env wish', file=ofile)
+            print('#--------------------------------------------', file=ofile)
+            print('# Script to generate .gds library from files   ', file=ofile)
+            print('#--------------------------------------------', file=ofile)
+            print('drc off', file=ofile)
+            print('gds readonly true', file=ofile)
+            print('gds flatten true', file=ofile)
+            print('gds rescale false', file=ofile)
+            print('tech unlock *', file=ofile)
+
+            for gdsfile in glist:
+                print('gds read ' + gdsfile, file=ofile)
+
+            print('puts stdout "Creating cell ' + destlib + '"', file=ofile)
+            print('load ' + destlib, file=ofile)
+            print('puts stdout "Adding cells to library"', file=ofile)
+            print('box values 0 0 0 0', file=ofile)
+            for gdsfile in glist:
+                gdsroot = os.path.split(gdsfile)[1]
+                gdsname = os.path.splitext(gdsroot)[0]
+                print('getcell ' + gdsname, file=ofile)
+                # Could properly make space for the cell here. . . 
+                print('box move e 200', file=ofile)
+                                
+            print('puts stdout "Writing GDS file ' + destlib + '"', file=ofile)
+            print('gds write ' + destlib, file=ofile)
+            print('puts stdout "Done."', file=ofile)
+            print('quit -noprompt', file=ofile)
+
+        # Run magic to read in the individual GDS files and
+        # write out the consolidated GDS library
+
+        print('Running magic to create GDS library.')
+        sys.stdout.flush()
+
+        mproc = subprocess.run(['magic', '-dnull', '-noconsole',
+			destlibdir + '/generate_magic.tcl'],
+			stdin = subprocess.DEVNULL,
+			stdout = subprocess.PIPE,
+			stderr = subprocess.PIPE, cwd = destlibdir,
+			universal_newlines = True)
+
+        if mproc.stdout:
+            for line in mproc.stdout.splitlines():
+                print(line)
+        if mproc.stderr:
+            print('Error message output from magic:')
+            for line in mproc.stderr.splitlines():
+                print(line)
+        if mproc.returncode != 0:
+            print('ERROR:  Magic exited with status ' + str(mproc.returncode))
+        if do_compile_only == True:
+            print('Compile-only:  Removing individual GDS files')
+            for gfile in glist:
+                if os.path.isfile(gfile):
+                    os.remove(gfile)
+            if newname:
+                if os.path.isfile(newname):
+                    os.remove(newname)
+    else:
+        print('Only one file (' + str(glist) + ');  ignoring "compile" option.')
+
+#----------------------------------------------------------------------------
+# Given a destination directory holding individual SPICE netlists of a number
+# of cells, create a single SPICE library file named <alllibname> and place
+# it in the same directory.  This is done for the option "compile" if specified
+# for the "-spice" install.
+#----------------------------------------------------------------------------
+
+def create_spice_library(destlibdir, destlib, spiext, do_compile_only, do_stub, excludelist):
+
+    fformat = 'CDL' if spiext == '.cdl' else 'SPICE'
+
+    allstubname = destlibdir + '/stub' + spiext
+    alllibname = destlibdir + '/' + destlib + spiext
+    if do_stub:
+        outputname = allstubname
+    else:
+        outputname = alllibname
+
+    print('Diagnostic:  Creating consolidated ' + fformat + ' library ' + outputname)
+
+    if os.path.isfile(outputname):
+        os.remove(outputname)
+
+    if fformat == 'CDL':
+        slist = glob.glob(destlibdir + '/*.cdl')
+    else:
+        # Sadly, there is no consensus on what a SPICE file extension should be.
+        slist = glob.glob(destlibdir + '/*.spc')
+        slist.extend(glob.glob(destlibdir + '/*.spice'))
+        slist.extend(glob.glob(destlibdir + '/*.spi'))
+        slist.extend(glob.glob(destlibdir + '/*.ckt'))
+
+    if alllibname in slist:
+        slist.remove(alllibname)
+
+    if allstubname in slist:
+        slist.remove(allstubname)
+
+    # Create exclude list with glob-style matching using fnmatch
+    if len(slist) > 0:
+        slistnames = list(os.path.split(item)[1] for item in slist)
+        notslist = []
+        for exclude in excludelist:
+            notslist.extend(fnmatch.filter(slistnames, exclude))
+
+        # Apply exclude list
+        if len(notslist) > 0:
+            for file in slist[:]:
+                if os.path.split(file)[1] in notslist:
+                    slist.remove(file)
+
+    if len(slist) > 1:
+        with open(outputname, 'w') as ofile:
+            allsubckts = []
+            for sfile in slist:
+                with open(sfile, 'r') as ifile:
+                    # print('Adding ' + sfile + ' to library.')
+                    stext = ifile.read()
+                    subckts = re.findall(r'\.subckt[ \t]+([^ \t\n]+)', stext, flags=re.IGNORECASE)
+                    sseen = list(item for item in subckts if item in allsubckts)
+                    allsubckts.extend(list(item for item in subckts if item not in allsubckts))
+                    sfilter = remove_redundant_subckts(stext, allsubckts, sseen)
+                    print(sfilter, file=ofile)
+                print('\n******* EOF\n', file=ofile)
+
+        if do_compile_only == True:
+            print('Compile-only:  Removing individual SPICE files')
+            for sfile in slist:
+                if os.path.isfile(sfile):
+                    os.remove(sfile)
+                elif os.path.islink(sfile):
+                    os.unlink(sfile)
+    else:
+        print('Only one file (' + str(slist) + ');  ignoring "compile" option.')
+
+#----------------------------------------------------------------------------
+# Remove redundant subcircuit entries from a SPICE or CDL netlist file.  "sseen"
+# is a list of subcircuit names gleaned from all previously read files using
+# re.findall(). "slist" is a list of subcircuits including those in "ntext".
+# If a subcircuit is defined outside of "ntext", then remove all occurrences in
+# "ntext".  Otherwise, if a subcircuit is defined more than once in "ntext",
+# remove all but one copy.  The reason for doing this is that some netlists will
+# include primitive device definitions used by all the standard cell subcircuits.
+#
+# It may be necessary to remove redundant .include statements and redundant .model
+# and/or .option statements as well.
+#----------------------------------------------------------------------------
+
+def remove_redundant_subckts(ntext, slist, sseen):
+    updated = ntext
+    for subckt in slist:
+        if subckt in sseen:
+            # Remove all occurrences of subckt
+            updated = re.sub(r'\n\.subckt[ \t]+' + subckt + '[ \t\n]+.*\n\.ends[ \t\n]+', '\n', updated, flags=re.IGNORECASE | re.DOTALL)
+
+        else:
+            # Determine the number of times the subcircuit appears in the text
+            n = len(re.findall(r'\n\.subckt[ \t]+' + subckt + '[ \t\n]+.*\n\.ends[ \t\n]+', updated, flags=re.IGNORECASE | re.DOTALL))
+            # Optimization:  Just keep original text if n < 2
+            if n < 2:
+                continue
+
+            # Remove all but one
+            updated = re.sub(r'\n\.subckt[ \t]+' + subckt + '[ \t\n]+.*\n\.ends[ \t\n]+', '\n', n - 1, updated, flags=re.IGNORECASE | re.DOTALL)
+    return updated
+
+#----------------------------------------------------------------------------
+# This is the main entry point for the foundry install script.
+#----------------------------------------------------------------------------
+
+if __name__ == '__main__':
+
+    if len(sys.argv) == 1:
+        print("No options given to foundry_install.py.")
+        usage()
+        sys.exit(0)
+    
+    optionlist = []
+    newopt = []
+
+    sourcedir = None
+    targetdir = None
+
+    ef_format = False
+    do_clean = False
+
+    have_lef = False
+    have_techlef = False
+    have_lefanno = False
+    have_gds = False
+    have_spice = False
+    have_cdl = False
+    have_verilog = False
+    have_lib = False
+
+    # Break arguments into groups where the first word begins with "-".
+    # All following words not beginning with "-" are appended to the
+    # same list (optionlist).  Then each optionlist is processed.
+    # Note that the first entry in optionlist has the '-' removed.
+
+    for option in sys.argv[1:]:
+        if option.find('-', 0) == 0:
+            if newopt != []:
+                optionlist.append(newopt)
+                newopt = []
+            newopt.append(option[1:])
+        else:
+            newopt.append(option)
+
+    if newopt != []:
+        optionlist.append(newopt)
+
+    # Pull library names from optionlist
+    libraries = []
+    for option in optionlist[:]:
+        if option[0] == 'library':
+            optionlist.remove(option)
+            libraries.append(option[1:]) 
+
+    # Check for option "ef_format" or "std_format" or "clean"
+    for option in optionlist[:]:
+        if option[0] == 'ef_naming' or option[0] == 'ef_names' or option[0] == 'ef_format':
+            optionlist.remove(option)
+            ef_format = True
+        elif option[0] == 'std_naming' or option[0] == 'std_names' or option[0] == 'std_format':
+            optionlist.remove(option)
+            ef_format = False
+        elif option[0] == 'clean':
+            do_clean = True
+
+    # Check for options "source" and "target"
+    for option in optionlist[:]:
+        if option[0] == 'source':
+            optionlist.remove(option)
+            sourcedir = option[1]
+        elif option[0] == 'target':
+            optionlist.remove(option)
+            targetdir = option[1]
+
+    if not targetdir:
+        print("No target directory specified.  Exiting.")
+        sys.exit(1)
+
+    # Take the target PDK name from the target path last component
+    pdkname = os.path.split(targetdir)[1]
+
+    # If targetdir (the staging area) exists, make sure it's empty.
+
+    if os.path.isdir(targetdir):
+        # Error if targetdir exists but is not writeable
+        if not os.access(targetdir, os.W_OK):
+            print("Target installation directory " + targetdir + " is not writable.")
+            sys.exit(1)
+
+        # Clear out the staging directory if specified
+        if do_clean:
+            shutil.rmtree(targetdir)
+    elif os.path.exists(targetdir):
+        print("Target installation directory " + targetdir + " is not a directory.")
+        sys.exit(1)
+
+    # Error if no source or dest specified unless "-clean" was specified
+    if not sourcedir:
+        if do_clean:
+            print("Done removing staging area.")
+            sys.exit(0)
+        else:
+            print("No source directory specified.  Exiting.")
+            sys.exit(1)
+
+    # Create the target directory
+    os.makedirs(targetdir, exist_ok=True)
+
+    #----------------------------------------------------------------
+    # Installation part 1:  Install files into the staging directory
+    #----------------------------------------------------------------
+
+    # Diagnostic
+    print("Installing in target (staging) directory " + targetdir)
+
+    # Create the top-level directories
+
+    os.makedirs(targetdir + '/libs.tech', exist_ok=True)
+    os.makedirs(targetdir + '/libs.ref', exist_ok=True)
+
+    # Path to magic techfile depends on ef_format
+
+    if ef_format == True:
+        mag_current = '/libs.tech/magic/current/'
+    else:
+        mag_current = '/libs.tech/magic/'
+
+    # Check for magic version and set flag if it does not exist or if
+    # it has the wrong version.
+    have_mag_8_2 = False
+    try:
+        mproc = subprocess.run(['magic', '--version'],
+		stdout = subprocess.PIPE,
+		stderr = subprocess.PIPE,
+		universal_newlines = True)
+        if mproc.stdout:
+            mag_version = mproc.stdout.splitlines()[0]
+            mag_version_info = mag_version.split('.')
+            try:
+                if int(mag_version_info[0]) > 8:
+                    have_mag_8_2 = True
+                elif int(mag_version_info[0]) == 8:
+                    if int(mag_version_info[1]) >= 2:
+                        have_mag_8_2 = True
+                        print('Magic version 8.2 available on the system.')
+            except ValueError:
+                print('Error: "magic --version" did not return valid version number.')
+    except FileNotFoundError:
+        print('Error: Failed to find executable for magic in standard search path.')
+
+    if not have_mag_8_2:
+        print('WARNING:  Magic version 8.2 cannot be executed from the standard executable search path.')
+        print('Please install or correct the search path.')
+        print('Magic database files will not be created, and other missing file formats may not be generated.')
+
+    # Populate any targets that do not specify a library, or where the library is
+    # specified as "primitive".  
+
+    # Populate the techLEF and SPICE models, if specified.  Also, this section can add
+    # to any directory in libs.tech/ as given by the option;  e.g., "-ngspice" will
+    # install into libs.tech/ngspice/.
+
+    if libraries == [] or 'primitive' in libraries[0]:
+
+        for option in optionlist[:]:
+
+            # Legacy behavior is to put libs.tech models and techLEF files in
+            # the same grouping as files for the primdev library (which go in
+            # libs.ref).  Current behavior is to put all libs.tech files in
+            # a grouping with no library, with unrestricted ability to write
+            # into any subdirectory of libs.tech/.  Therefore, need to restrict
+            # legacy use to just 'techlef' and 'models'.
+
+            if len(libraries) > 0 and 'primitive' in libraries[0]:
+                if option[0] != 'techlef' and option[0] != 'techLEF' and option[0] != 'models':
+                    continue
+  
+            # Normally technology LEF files are associated with IP libraries.
+            # However, if no library is specified or the library is 'primitive'
+            # (legacy behavior), then put in the techLEF directory with no subdirectory.
+
+            filter_scripts = []
+            if option[0] == 'techlef' or option[0] == 'techLEF':
+                for item in option:
+                    if item.split('=')[0] == 'filter':
+                        filter_scripts.append(item.split('=')[1])
+                        break
+
+                if ef_format:
+                    techlefdir = targetdir + '/libs.ref/' + 'techLEF'
+                else:
+                    techlefdir = targetdir + '/libs.tech/lef'
+
+                os.makedirs(techlefdir, exist_ok=True)
+                # All techlef files should be copied, so use "glob" on the wildcards
+                techlist = glob.glob(substitute(sourcedir + '/' + option[1], None))
+
+                for lefname in techlist:
+                    leffile = os.path.split(lefname)[1]
+                    targname = techlefdir + '/' + leffile
+
+                    if os.path.isfile(lefname):
+                        shutil.copy(lefname, targname)
+                    else:
+                        shutil.copytree(lefname, targname)
+
+                    for filter_script in filter_scripts:
+                        # Apply filter script to all files in the target directory
+                        tfilter(targname, filter_script)
+
+                optionlist.remove(option)
+
+            # All remaining options will refer to specific tools (e.g., -ngspice, -magic)
+            # although generic names (.e.g, -models) are acceptable if the tools know
+            # where to find the files.  Currently, most tools have their own formats
+            # and standards for setup, and so generally each install directory will be
+            # unique to one EDA tool.
+
+            else:
+                filter_scripts = []
+                for item in option:
+                    if item.split('=')[0] == 'filter':
+                        filter_scripts.append(item.split('=')[1])
+                        break
+
+                print('Diagnostic:  installing ' + option[0] + '.')
+                tooldir = targetdir + '/libs.tech/' + option[0]
+                os.makedirs(tooldir, exist_ok=True)
+
+                # All files should be linked or copied, so use "glob" on
+                # the wildcards.  Copy each file and recursively copy each
+                # directory.
+                toollist = glob.glob(substitute(sourcedir + '/' + option[1], None))
+
+                for toolname in toollist:
+                    toolfile = os.path.split(toolname)[1]
+                    targname = tooldir + '/' + toolfile
+
+                    if os.path.isdir(toolname):
+                        # Remove any existing directory, and its contents
+                        if os.path.isdir(targname):
+                            shutil.rmtree(targname)
+                        os.makedirs(targname)
+    
+                        # Recursively find and copy or link the whole directory
+                        # tree from this point.
+
+                        alltoollist = glob.glob(toolname + '/**', recursive=True)
+                        commonpart = os.path.commonpath(alltoollist)
+                        for subtoolname in alltoollist:
+                            if os.path.isdir(subtoolname):
+                                continue
+                            # Get the path part that is not common between toollist and
+                            # alltoollist.
+                            subpart = os.path.relpath(subtoolname, commonpart)
+                            subtargname = targname + '/' + subpart
+                            os.makedirs(os.path.split(subtargname)[0], exist_ok=True)
+
+                            if os.path.isfile(subtoolname):
+                                shutil.copy(subtoolname, subtargname)
+                            else:
+                                shutil.copytree(subtoolname, subtargname)
+
+                            for filter_script in filter_scripts:
+                                # Apply filter script to all files in the target directory
+                                tfilter(subtargname, filter_script)
+
+                    else:
+                        # Remove any existing file
+                        if os.path.isfile(targname):
+                            os.remove(targname)
+                        elif os.path.isdir(targname):
+                            shutil.rmtree(targname)
+
+                        if os.path.isfile(toolname):
+                            shutil.copy(toolname, targname)
+                        else:
+                            shutil.copytree(toolname, targname)
+
+                        for filter_script in filter_scripts:
+                            # Apply filter script to all files in the target directory
+                            tfilter(targname, filter_script)
+
+                optionlist.remove(option)
+
+    # Do an initial pass through all of the options and determine what is being
+    # installed, so that we know in advance which file formats are missing and
+    # need to be generated.
+
+    for option in optionlist[:]:
+        if option[0] == 'lef':
+            have_lef = True
+        if option[0] == 'techlef' or option[0] == 'techLEF':
+            have_techlef = True
+        elif option[0] == 'gds':
+            have_gds = True
+        elif option[0] == 'spice' or option[0] == 'spi':
+            have_spice = True
+        elif option[0] == 'cdl':
+            have_cdl = True
+        elif option[0] == 'verilog':
+            have_verilog = True
+        elif option[0] == 'lib' or option[0] == 'liberty':
+            have_lib = True
+
+    # The remaining options in optionlist should all be types like 'lef' or 'liberty'
+    # and there should be a corresponding library list specified by '-library'
+
+    for option in optionlist[:]:
+
+        # Ignore if no library list---should have been taken care of above.
+        if libraries == []:
+            break
+
+        # Diagnostic
+        print("Install option: " + str(option[0]))
+
+        # For ef_format:  always make techlef -> techLEF and spice -> spi
+
+        if ef_format:
+            if option[0] == 'techlef':
+                option[0] = 'techLEF'
+            elif option[0] == 'spice':
+                option[0] = 'spi'
+
+            destdir = targetdir + '/libs.ref/' + option[0]
+            os.makedirs(destdir, exist_ok=True)
+
+        # If the option is followed by the keyword "up" and a number, then
+        # the source should be copied (or linked) from <number> levels up
+        # in the hierarchy (see below).
+
+        if 'up' in option:
+            uparg = option.index('up') 
+            try:
+                hier_up = int(option[uparg + 1])
+            except:
+                print("Non-numeric option to 'up': " + option[uparg + 1])
+                print("Ignoring 'up' option.")
+                hier_up = 0
+        else:
+            hier_up = 0
+
+        filter_scripts = []
+        for item in option:
+            if item.split('=')[0] == 'filter':
+                filter_scripts.append(item.split('=')[1])
+                break
+
+        # Option 'stub' applies to netlists ('cdl' or 'spice') and generates
+        # a file with only stub entries.
+        do_stub = 'stub' in option
+
+        # Option 'compile' is a standalone keyword ('comp' may be used).
+        do_compile = 'compile' in option or 'comp' in option
+        do_compile_only = 'compile-only' in option or 'comp-only' in option
+ 
+        # Option 'nospecify' is a standalone keyword ('nospec' may be used).
+        do_remove_spec = 'nospecify' in option or 'nospec' in option
+
+        # Option 'exclude' has an argument
+        try:
+            excludelist = list(item.split('=')[1].split(',') for item in option if item.startswith('excl'))[0]
+        except IndexError:
+            excludelist = []
+        else:
+            print('Excluding files: ' + (',').join(excludelist))
+
+        # Option 'rename' has an argument
+        try:
+            newname = list(item.split('=')[1] for item in option if item.startswith('rename'))[0]
+        except IndexError:
+            newname = None
+        else:
+            print('Renaming file to: ' + newname)
+
+        # 'anno' may be specified for LEF, in which case the LEF is used only
+        # to annotate GDS and is not itself installed;  this allows LEF to
+        # be generated from Magic and avoids quirky use of obstruction layers.
+        have_lefanno = True if 'annotate' in option or 'anno' in option else False
+        if have_lefanno: 
+            if option[0] != 'lef':
+                print("Warning: 'annotate' option specified outside of -lef.  Ignoring.")
+            else:
+                # Mark as NOT having LEF since we want to use it only for annotation.
+                have_lef = False
+
+        # For each library, create the library subdirectory
+        for library in libraries:
+            if len(library) == 3:
+                destlib = library[2]
+            else:
+                destlib = library[1]
+
+            if ef_format:
+                destlibdir = destdir + '/' + destlib
+            else:
+                destdir = targetdir + '/libs.ref/' + destlib + '/' + option[0]
+                destlibdir = destdir
+
+            os.makedirs(destlibdir, exist_ok=True)
+
+            # Populate the library subdirectory
+            # Parse the option and replace each '/*/' with the library name,
+            # and check if it is a valid directory name.  Then glob the
+            # resulting option name.  Warning:  This assumes that all
+            # occurences of the text '/*/' match a library name.  It should
+            # be possible to wild-card the directory name in such a way that
+            # this is always true.
+
+            testpath = substitute(sourcedir + '/' + option[1], library[1])
+            liblist = glob.glob(testpath)
+
+            # Create a file "sources.txt" (or append to it if it exists)
+            # and add the source directory name so that the staging install
+            # script can know where the files came from.
+
+            with open(destlibdir + '/sources.txt', 'a') as ofile:
+                print(testpath, file=ofile)
+
+            # Create exclude list with glob-style matching using fnmatch
+            if len(liblist) > 0:
+                liblistnames = list(os.path.split(item)[1] for item in liblist)
+                notliblist = []
+                for exclude in excludelist:
+                    notliblist.extend(fnmatch.filter(liblistnames, exclude))
+
+                # Apply exclude list
+                if len(notliblist) > 0:
+                    for file in liblist[:]:
+                        if os.path.split(file)[1] in notliblist:
+                            liblist.remove(file)
+
+                if len(excludelist) > 0 and len(notliblist) == 0:
+                    print('Warning:  Nothing from the exclude list found in sources.')
+                    print('excludelist = ' + str(excludelist))
+                    print('destlibdir = ' + destlibdir)
+
+            # Diagnostic
+            print('Collecting files from ' + testpath)
+            print('Files to install:')
+            if len(liblist) < 10:
+                for item in liblist:
+                    print('   ' + item)
+            else:
+                for item in liblist[0:4]:
+                    print('   ' + item)
+                print('   .')
+                print('   .')
+                print('   .')
+                for item in liblist[-6:-1]:
+                    print('   ' + item)
+                print('(' + str(len(liblist)) + ' files total)')
+
+            for libname in liblist:
+                # Note that there may be a hierarchy to the files in option[1],
+                # say for liberty timing files under different conditions, so
+                # make sure directories have been created as needed.
+
+                libfile = os.path.split(libname)[1]
+                libfilepath = os.path.split(libname)[0]
+                destpathcomp = []
+                for i in range(hier_up):
+                    destpathcomp.append('/' + os.path.split(libfilepath)[1])
+                    libfilepath = os.path.split(libfilepath)[0]
+                destpathcomp.reverse()
+                destpath = ''.join(destpathcomp)
+
+                if newname:
+                    if len(liblist) == 1:
+                        destfile = newname
+                    else:
+                        if not do_compile and not do_compile_only:
+                            print('Error:  rename specified but more than one file found!')
+                        destfile = libfile
+                else:
+                    destfile = libfile
+
+                targname = destlibdir + destpath + '/' + destfile
+
+                # NOTE:  When using "up" with link_from, could just make
+                # destpath itself a symbolic link;  this way is more flexible
+                # but adds one symbolic link per file.
+
+                if destpath != '':
+                    if not os.path.isdir(destlibdir + destpath):
+                        os.makedirs(destlibdir + destpath, exist_ok=True)
+
+                # Remove any existing file
+                if os.path.isfile(targname):
+                    os.remove(targname)
+                elif os.path.isdir(targname):
+                    shutil.rmtree(targname)
+
+                # NOTE:  Diagnostic, probably much too much output.
+                print('   Install:' + libname + ' to ' + targname)
+                if os.path.isfile(libname):
+                    shutil.copy(libname, targname)
+                else:
+                    shutil.copytree(libname, targname)
+
+                # File filtering options:  Two options 'stub' and 'nospec' are
+                # handled by scripts in ../common/.  Custom filters can also be
+                # specified.
+
+                local_filter_scripts = filter_scripts[:]
+
+                if option[0] == 'verilog':
+                    # Internally handle syntactical issues with verilog and iverilog
+                    vfilter(targname)
+
+                    if do_remove_spec:
+                        scriptdir = os.path.split(os.getcwd())[0] + '/common'
+                        local_filter_scripts.append(scriptdir + '/remove_specify.py')
+
+                elif option[0] == 'cdl' or option[0] == 'spi' or option[0] == 'spice':
+                    if do_stub:
+                        scriptdir = os.path.split(os.getcwd())[0] + '/common'
+                        local_filter_scripts.append(scriptdir + '/makestub.py')
+
+                for filter_script in local_filter_scripts:
+                    # Apply filter script to all files in the target directory
+                    tfilter(targname, filter_script)
+
+            if do_compile == True or do_compile_only == True:
+                # NOTE:  The purpose of "rename" is to put a destlib-named
+                # library elsewhere so that it can be merged with another
+                # library into a compiled <destlib>.<ext>
+
+                compname = destlib
+                    
+                # To do:  Make this compatible with linking from another PDK.
+
+                if option[0] == 'verilog':
+                    # If there is not a single file with all verilog cells in it,
+                    # then compile one, because one does not want to have to have
+                    # an include line for every single cell used in a design.
+
+                    create_verilog_library(destlibdir, compname, do_compile_only, do_stub, excludelist)
+
+                elif option[0] == 'gds' and have_mag_8_2:
+                    # If there is not a single file with all GDS cells in it,
+                    # then compile one.
+
+                    # Link to the PDK magic startup file from the target directory
+                    startup_script = targetdir + mag_current + pdkname + '-F.magicrc'
+                    if not os.path.isfile(startup_script):
+                        startup_script = targetdir + mag_current + pdkname + '.magicrc'
+                    create_gds_library(destlibdir, compname, startup_script, do_compile_only, excludelist)
+
+                elif option[0] == 'liberty' or option[0] == 'lib':
+                    # If there is not a single file with all liberty cells in it,
+                    # then compile one, because one does not want to have to have
+                    # an include line for every single cell used in a design.
+
+                    create_lib_library(destlibdir, compname, do_compile_only, excludelist)
+
+                elif option[0] == 'spice' or option[0] == 'spi':
+                    # If there is not a single file with all SPICE subcircuits in it,
+                    # then compile one, because one does not want to have to have
+                    # an include line for every single cell used in a design.
+
+                    spiext = '.spice' if not ef_format else '.spi'
+                    create_spice_library(destlibdir, compname, spiext, do_compile_only, do_stub, excludelist)
+                    if do_compile_only == True:
+                        if newname:
+                            if os.path.isfile(newname):
+                                os.remove(newname)
+
+                elif option[0] == 'cdl':
+                    # If there is not a single file with all CDL subcircuits in it,
+                    # then compile one, because one does not want to have to have
+                    # an include line for every single cell used in a design.
+
+                    create_spice_library(destlibdir, compname, '.cdl', do_compile_only, do_stub, excludelist)
+                    if do_compile_only == True:
+                        if newname:
+                            if os.path.isfile(newname):
+                                os.remove(newname)
+
+                elif option[0] == 'lef':
+                    # If there is not a single file with all LEF cells in it,
+                    # then compile one, because one does not want to have to have
+                    # an include line for every single cell used in a design.
+
+                    create_lef_library(destlibdir, compname, do_compile_only, excludelist)
+
+        # Find any libraries/options marked as "privileged" (or "private") and
+        # move the files from libs.tech or libs.ref to libs.priv, leaving a
+        # symbolic link in the original location.  Do this during the initial
+        # install so that options following in the list can add files to the
+        # non-privileged equivalent directory path.
+
+        if 'priv' in option or 'privileged' in option or 'private' in option:
+
+            # Diagnostic
+            print("Install option: " + str(option[0]))
+
+            if ef_format == True:
+                os.makedirs(targetdir + '/libs.priv', exist_ok=True)
+
+            for library in libraries:
+                if len(library) == 3:
+                    destlib = library[2]
+                else:
+                    destlib = library[1]
+
+                if ef_format:
+                    srclibdir = targetdir + '/libs.ref/' + option[0] + '/' + destlib
+                    destlibdir = targetdir + '/libs.priv/' + option[0] + '/' + destlib
+                else:
+                    srclibdir = targetdir + '/libs.ref/' + destlib + '/' + option[0]
+                    destlibdir = targetdir + '/libs.priv/' + destlib + '/' + option[0]
+
+                if not os.path.exists(destlibdir):
+                    os.makedirs(destlibdir)
+
+                print('Moving files in ' + srclibdir + ' to privileged space.')
+                filelist = os.listdir(srclibdir)
+                for file in filelist:
+                    srcfile = srclibdir + '/' + file
+                    destfile = destlibdir + '/' + file
+                    if os.path.isfile(destfile):
+                        os.remove(destfile)
+                    elif os.path.isdir(destfile):
+                        shutil.rmtree(destfile)
+
+                    if os.path.isfile(srcfile):
+                        shutil.copy(srcfile, destfile)
+                        os.remove(srcfile)
+                    else:
+                        shutil.copytree(srcfile, destfile)
+                        shutil.rmtree(srcfile)
+
+    print("Completed installation of vendor files.")
+
+    #----------------------------------------------------------------
+    # Installation part 2:  Generate derived file formats
+    #----------------------------------------------------------------
+
+    # Now for the harder part.  If GDS and/or LEF databases were specified,
+    # then migrate them to magic (.mag files in layout/ or abstract/).
+
+    ignorelist = []
+    do_cdl_scaleu  = False
+    no_cdl_convert = False
+    no_gds_convert = False
+    no_lef_convert = False
+    cdl_compile_only = False
+
+    cdl_exclude = []
+    lef_exclude = []
+    gds_exclude = []
+    spice_exclude = []
+    verilog_exclude = []
+
+    cdl_reflib = '/libs.ref/'
+    gds_reflib = '/libs.ref/'
+    lef_reflib = '/libs.ref/'
+
+    for option in optionlist[:]:
+        if option[0] == 'cdl':
+            # Option 'scaleu' is a standalone keyword
+            do_cdl_scaleu = 'scaleu' in option
+
+            # Option 'ignore' has arguments after '='
+            for item in option:
+                if item.split('=')[0] == 'ignore':
+                    ignorelist = item.split('=')[1].split(',')
+
+	# Option 'noconvert' is a standalone keyword.
+        if 'noconvert' in option:
+            if option[0] == 'cdl':
+                no_cdl_convert = True
+            elif option[0] == 'gds':
+                no_gds_convert = True
+            elif option[0] == 'lef':
+                no_lef_convert = True
+
+        # Option 'privileged' is a standalone keyword.
+        if 'priv' in option or 'privileged' in option or 'private' in option:
+            if option[0] == 'cdl':
+                cdl_reflib = '/libs.priv/'
+            elif option[0] == 'gds':
+                gds_reflib = '/libs.priv/'
+            elif option[0] == 'lef':
+                lef_reflib = '/libs.priv/'
+
+        # If CDL is marked 'compile-only' then CDL should only convert the
+        # compiled file to SPICE if conversion is needed.
+        if 'compile-only' in option:
+            if option[0] == 'cdl':
+                cdl_compile_only = True
+
+        # Find exclude list for any option
+        for item in option:
+            if item.split('=')[0] == 'exclude':
+                exclude_list = item.split('=')[1].split(',')
+                if option[0] == 'cdl':
+                    cdl_exclude = exclude_list
+                elif option[0] == 'lef':
+                    lef_exclude = exclude_list
+                elif option[0] == 'gds':
+                    gds_exclude = exclude_list
+                elif option[0] == 'spi' or option[0] == 'spice':
+                    spice_exclude = exclude_list
+                elif option[0] == 'verilog':
+                    verilog_exclude = exclude_list
+ 
+    devlist = []
+    pdklibrary = None
+
+    if have_gds and not no_gds_convert:
+        print("Migrating GDS files to layout.")
+
+        if ef_format:
+            destdir = targetdir + gds_reflib + 'mag'
+            srcdir = targetdir + gds_reflib + 'gds'
+            vdir = targetdir + '/libs.ref/' + 'verilog'
+            cdir = targetdir + cdl_reflib + 'cdl'
+            sdir = targetdir + cdl_reflib + 'spi'
+
+            os.makedirs(destdir, exist_ok=True)
+
+        # For each library, create the library subdirectory
+        for library in libraries:
+            if len(library) == 3:
+                destlib = library[2]
+            else:
+                destlib = library[1]
+
+            if ef_format:
+                destlibdir = destdir + '/' + destlib
+                srclibdir = srcdir + '/' + destlib
+                vlibdir = vdir + '/' + destlib
+                clibdir = cdir + '/' + destlib
+                slibdir = sdir + '/' + destlib
+            else:
+                destdir = targetdir + gds_reflib + destlib + '/mag'
+                srcdir = targetdir + gds_reflib + destlib + '/gds'
+                vdir = targetdir + '/libs.ref/' + destlib + '/verilog'
+                cdir = targetdir + cdl_reflib + destlib + '/cdl'
+                sdir = targetdir + cdl_reflib + destlib + '/spice'
+                destlibdir = destdir
+                srclibdir = srcdir
+                vlibdir = vdir
+                clibdir = cdir
+                slibdir = sdir
+
+            os.makedirs(destlibdir, exist_ok=True)
+
+            # For primitive devices, check the PDK script and find the name
+            # of the library and get a list of supported devices.
+
+            if library[0] == 'primitive':
+                pdkscript = targetdir + mag_current + pdkname + '.tcl'
+                print('Searching for supported devices in PDK script ' + pdkscript + '.')
+
+                if os.path.isfile(pdkscript):
+                    librex = re.compile('^[ \t]*set[ \t]+PDKNAMESPACE[ \t]+([^ \t]+)$')
+                    devrex = re.compile('^[ \t]*proc[ \t]+([^ :\t]+)::([^ \t_]+)_defaults')
+                    fixrex = re.compile('^[ \t]*return[ \t]+\[([^ :\t]+)::fixed_draw[ \t]+([^ \t]+)[ \t]+')
+                    devlist = []
+                    fixedlist = []
+                    with open(pdkscript, 'r') as ifile:
+                        scripttext = ifile.read().splitlines()
+                        for line in scripttext:
+                            lmatch = librex.match(line)
+                            if lmatch:
+                                pdklibrary = lmatch.group(1)
+                            dmatch = devrex.match(line)
+                            if dmatch:
+                                if dmatch.group(1) == pdklibrary:
+                                    devlist.append(dmatch.group(2))
+                            fmatch = fixrex.match(line)
+                            if fmatch:
+                                if fmatch.group(1) == pdklibrary:
+                                    fixedlist.append(fmatch.group(2))
+
+                # Diagnostic
+                print("PDK library is " + str(pdklibrary))
+
+            # Link to the PDK magic startup file from the target directory
+            # If there is no -F version then look for one without -F (open source PDK)
+            startup_script = targetdir + mag_current + pdkname + '-F.magicrc'
+            if not os.path.isfile(startup_script):
+                startup_script = targetdir + mag_current + pdkname + '.magicrc'
+
+            if have_mag_8_2 and os.path.isfile(startup_script):
+                # If the symbolic link exists, remove it.
+                if os.path.isfile(destlibdir + '/.magicrc'):
+                    os.remove(destlibdir + '/.magicrc')
+                os.symlink(startup_script, destlibdir + '/.magicrc')
+ 
+                # Find GDS file names in the source
+                print('Getting GDS file list from ' + srclibdir + '.')
+                gdsfilesraw = os.listdir(srclibdir)
+                gdsfiles = []
+                for gdsfile in gdsfilesraw:
+                    gdsext = os.path.splitext(gdsfile)[1].lower()
+                    if gdsext == '.gds' or gdsext == '.gdsii' or gdsext == '.gds2':
+                        gdsfiles.append(gdsfile)
+
+                # Create exclude list with glob-style matching using fnmatch
+                if len(gdsfiles) > 0:
+                    gdsnames = list(os.path.split(item)[1] for item in gdsfiles)
+                    notgdsnames = []
+                    for exclude in gds_exclude:
+                        notgdsnames.extend(fnmatch.filter(gdsnames, exclude))
+
+                    # Apply exclude list
+                    if len(notgdsnames) > 0:
+                        for file in gdsfiles[:]:
+                            if os.path.split(file)[1] in notgdsnames:
+                                gdsfiles.remove(file)
+
+                # Generate a script called "generate_magic.tcl" and leave it in
+                # the target directory.  Use it as input to magic to create the
+                # .mag files from the database.
+
+                print('Creating magic generation script to generate magic database files.') 
+
+                with open(destlibdir + '/generate_magic.tcl', 'w') as ofile:
+                    print('#!/usr/bin/env wish', file=ofile)
+                    print('#--------------------------------------------', file=ofile)
+                    print('# Script to generate .mag files from .gds    ', file=ofile)
+                    print('#--------------------------------------------', file=ofile)
+                    print('gds readonly true', file=ofile)
+                    print('gds flatten true', file=ofile)
+                    print('gds rescale false', file=ofile)
+                    print('tech unlock *', file=ofile)
+
+                    for gdsfile in gdsfiles:
+                        # Note:  DO NOT use a relative path here.
+                        print('gds read ' + srclibdir + '/' + gdsfile, file=ofile)
+
+                    # Make sure properties include the Tcl generated cell
+                    # information from the PDK script
+
+                    if pdklibrary:
+                        tclfixedlist = '{' + ' '.join(fixedlist) + '}'
+                        print('set devlist ' + tclfixedlist, file=ofile)
+                        print('set topcell [lindex [cellname list top] 0]',
+				    file=ofile)
+
+                        print('foreach cellname $devlist {', file=ofile)
+                        print('    load $cellname', file=ofile)
+                        print('    property gencell $cellname', file=ofile)
+                        print('    property parameter m=1', file=ofile)
+                        print('    property library ' + pdklibrary, file=ofile)
+                        print('}', file=ofile)
+                        print('load $topcell', file=ofile)
+
+                    print('cellname delete \(UNNAMED\)', file=ofile)
+                    print('writeall force', file=ofile)
+
+                    leffiles = []
+                    lefmacros = []
+                    if have_lefanno:
+                        # Find LEF file names in the source
+                        if ef_format:
+                            lefsrcdir = targetdir + lef_reflib + 'lefanno'
+                            lefsrclibdir = lefsrcdir + '/' + destlib
+                        else:
+                            lefsrcdir = targetdir + lef_reflib + destlib + '/lefanno'
+                            lefsrclibdir = lefsrcdir
+
+                        leffiles = os.listdir(lefsrclibdir)
+                        leffiles = list(item for item in leffiles if os.path.splitext(item)[1] == '.lef')
+                        # Get list of abstract views to make from LEF macros
+                        for leffile in leffiles:
+                            with open(leffile, 'r') as ifile:
+                                ltext = ifile.read()
+                                llines = ltext.splitlines()
+                                for lline in llines:
+                                    ltok = re.split(' |\t|\(', lline)
+                                    if ltok[0] == 'MACRO':
+                                        lefmacros.append(ltok[1])
+
+                        # Create exclude list with glob-style matching using fnmatch
+                        if len(lefmacros) > 0:
+                            lefnames = list(os.path.split(item)[1] for item in lefmacros)
+                            notlefnames = []
+                            for exclude in lef_exclude:
+                                notlefnames.extend(fnmatch.filter(lefnames, exclude))
+
+                            # Apply exclude list
+                            if len(notlefnames) > 0:
+                                for file in lefmacros[:]:
+                                    if os.path.split(file)[1] in notlefnames:
+                                        lefmacros.remove(file)
+
+                    elif have_verilog and os.path.isdir(vlibdir):
+                        # Get list of abstract views to make from verilog modules
+                        vfiles = os.listdir(vlibdir)
+                        vfiles = list(item for item in vfiles if os.path.splitext(item)[1] == '.v')
+                        for vfile in vfiles:
+                            with open(vlibdir + '/' + vfile, 'r') as ifile:
+                                vtext = ifile.read()
+                                vlines = vtext.splitlines()
+                                for vline in vlines:
+                                    vtok = re.split(' |\t|\(', vline)
+                                    try:
+                                        if vtok[0] == 'module':
+                                            if vtok[1] not in lefmacros:
+                                                lefmacros.append(vtok[1])
+                                    except:
+                                        pass
+
+                        # Create exclude list with glob-style matching using fnmatch
+                        if len(lefmacros) > 0:
+                            lefnames = list(os.path.split(item)[1] for item in lefmacros)
+                            notlefnames = []
+                            for exclude in verilog_exclude:
+                                notlefnames.extend(fnmatch.filter(lefnames, exclude))
+
+                            # Apply exclude list
+                            if len(notlefnames) > 0:
+                                for file in lefmacros[:]:
+                                    if os.path.split(file)[1] in notlefnames:
+                                        lefmacros.remove(file)
+
+                    elif have_cdl and os.path.isdir(clibdir):
+                        # Get list of abstract views to make from CDL subcircuits
+                        cfiles = os.listdir(clibdir)
+                        cfiles = list(item for item in cfiles if os.path.splitext(item)[1] == '.cdl')
+                        for cfile in cfiles:
+                            with open(clibdir + '/' + cfile, 'r') as ifile:
+                                ctext = ifile.read()
+                                clines = ctext.splitlines()
+                                for cline in clines:
+                                    ctok = cline.split()
+                                    try:
+                                        if ctok[0].lower() == '.subckt':
+                                            if ctok[1] not in lefmacros:
+                                                lefmacros.append(ctok[1])
+                                    except:
+                                        pass
+
+                        # Create exclude list with glob-style matching using fnmatch
+                        if len(lefmacros) > 0:
+                            lefnames = list(os.path.split(item)[1] for item in lefmacros)
+                            notlefnames = []
+                            for exclude in cdl_exclude:
+                                notlefnames.extend(fnmatch.filter(lefnames, exclude))
+
+                            # Apply exclude list
+                            if len(notlefnames) > 0:
+                                for file in lefmacros[:]:
+                                    if os.path.split(file)[1] in notlefnames:
+                                        lefmacros.remove(file)
+
+                    elif have_spice and os.path.isdir(slibdir):
+                        # Get list of abstract views to make from SPICE subcircuits
+                        sfiles = os.listdir(slibdir)
+                        sfiles = list(item for item in sfiles)
+                        for sfile in sfiles:
+                            with open(slibdir + '/' + sfile, 'r') as ifile:
+                                stext = ifile.read()
+                                slines = stext.splitlines()
+                                for sline in slines:
+                                    stok = sline.split()
+                                    try:
+                                        if stok[0].lower() == '.subckt':
+                                            if stok[1] not in lefmacros:
+                                                lefmacros.append(stok[1])
+                                    except:
+                                        pass
+
+                        # Create exclude list with glob-style matching using fnmatch
+                        if len(lefmacros) > 0:
+                            lefnames = list(os.path.split(item)[1] for item in lefmacros)
+                            notlefnames = []
+                            for exclude in spice_exclude:
+                                notlefnames.extend(fnmatch.filter(lefnames, exclude))
+
+                            # Apply exclude list
+                            if len(notlefnames) > 0:
+                                for file in lefmacros[:]:
+                                    if os.path.split(file)[1] in notlefnames:
+                                        lefmacros.remove(file)
+
+                    if not lefmacros:
+                        print('No source for abstract views:  Abstract views not made.')
+                    elif not have_lef:
+                        # This library has a GDS database but no LEF database.  Use
+                        # magic to create abstract views of the GDS cells.  If
+                        # option "annotate" is given, then read the LEF file after
+                        # loading the database file to annotate the cell with
+                        # information from the LEF file.  This usually indicates
+                        # that the LEF file has some weird definition of obstruction
+                        # layers and we want to normalize them by using magic's LEF
+                        # write procedure, but we still need the pin use and class
+                        # information from the LEF file, and maybe the bounding box.
+
+                        for leffile in leffiles:
+                            if have_lefanno:
+                                print('lef read ' + lefsrclibdir + '/' + leffile, file=ofile)
+                        for lefmacro in lefmacros:
+                            print('if {[cellname list exists ' + lefmacro + '] != 0} {', file=ofile)
+                            print('   load ' + lefmacro, file=ofile)
+                            print('   lef write ' + lefmacro + ' -hide', file=ofile)
+                            print('}', file=ofile)
+                    print('puts stdout "Done."', file=ofile)
+                    print('quit -noprompt', file=ofile)
+
+                print('Running magic to create magic database files.')
+                sys.stdout.flush()
+
+                # Run magic to read in the GDS file and write out magic databases.
+                with open(destlibdir + '/generate_magic.tcl', 'r') as ifile:
+                    mproc = subprocess.run(['magic', '-dnull', '-noconsole'],
+				stdin = ifile, stdout = subprocess.PIPE,
+				stderr = subprocess.PIPE, cwd = destlibdir,
+				universal_newlines = True)
+                    if mproc.stdout:
+                        for line in mproc.stdout.splitlines():
+                            print(line)
+                    if mproc.stderr:
+                        print('Error message output from magic:')
+                        for line in mproc.stderr.splitlines():
+                            print(line)
+                    if mproc.returncode != 0:
+                        print('ERROR:  Magic exited with status ' + str(mproc.returncode))
+
+                if not have_lef:
+                    print('No LEF file install;  need to generate LEF.')
+                    # Remove the lefanno/ target and its contents.
+                    if have_lefanno:
+                        if ef_format:
+                            lefannosrcdir = targetdir + lef_reflib + 'lefanno'
+                        else:
+                            lefannosrcdir = targetdir + lef_reflib + destlib + '/lefanno'
+                        if os.path.isdir(lefannosrcdir):
+                            shutil.rmtree(lefannosrcdir)
+
+                    if ef_format:
+                        destlefdir = targetdir + lef_reflib + 'lef'
+                        destleflibdir = destlefdir + '/' + destlib
+                    else:
+                        destlefdir = targetdir + lef_reflib + destlib + '/lef'
+                        destleflibdir = destlefdir
+
+                    os.makedirs(destleflibdir, exist_ok=True)
+                    leflist = os.listdir(destlibdir)
+                    leflist = list(item for item in leflist if os.path.splitext(item)[1] == '.lef')
+
+                    # All macros will go into one file
+                    destleflib = destleflibdir + '/' + destlib + '.lef'
+                    # Remove any existing library file from the target directory
+                    if os.path.isfile(destleflib):
+                        print('Removing existing library ' + destleflib)
+                        os.remove(destleflib)
+
+                    first = True
+                    with open(destleflib, 'w') as ofile:
+                        for leffile in leflist:
+                            # Remove any existing single file from the target directory
+                            if os.path.isfile(destleflibdir + '/' + leffile):
+                                print('Removing ' + destleflibdir + '/' + leffile)
+                                os.remove(destleflibdir + '/' + leffile)
+
+                            # Append contents
+                            sourcelef =  destlibdir + '/' + leffile
+                            with open(sourcelef, 'r') as ifile:
+                                leflines = ifile.read().splitlines()
+                                if not first:
+                                    # Remove header from all but the first file
+                                    leflines = leflines[8:]
+                                else:
+                                    first = False
+
+                            for line in leflines:
+                                print(line, file=ofile)
+
+                            # Remove file from the source directory
+                            print('Removing source file ' + sourcelef)
+                            os.remove(sourcelef)
+
+                    # Set have_lef now that LEF files were made, so they
+                    # can be used to generate the maglef/ databases.
+                    have_lef = True
+
+            elif not have_mag_8_2:
+                print('The installer is not able to run magic.')
+            else:
+                print("Master PDK magic startup file not found.  Did you install")
+                print("PDK tech files before PDK vendor files?")
+
+    if have_lef and not no_lef_convert:
+        print("Migrating LEF files to layout.")
+        if ef_format:
+            destdir = targetdir + '/libs.ref/' + 'maglef'
+            srcdir = targetdir + lef_reflib + 'lef'
+            magdir = targetdir + gds_reflib + 'mag'
+            cdldir = targetdir + cdl_reflib + 'cdl'
+            os.makedirs(destdir, exist_ok=True)
+
+        # For each library, create the library subdirectory
+        for library in libraries:
+            if len(library) == 3:
+                destlib = library[2]
+            else:
+                destlib = library[1]
+
+            if ef_format:
+                destlibdir = destdir + '/' + destlib
+                srclibdir = srcdir + '/' + destlib
+                maglibdir = magdir + '/' + destlib
+                cdllibdir = cdldir + '/' + destlib
+            else:
+                destdir = targetdir + '/libs.ref/' + destlib + '/maglef'
+                srcdir = targetdir + lef_reflib + destlib + '/lef'
+                magdir = targetdir + gds_reflib + destlib + '/mag'
+                cdldir = targetdir + cdl_reflib + destlib + '/cdl'
+
+                destlibdir = destdir
+                srclibdir = srcdir
+                maglibdir = magdir
+                cdllibdir = cdldir
+
+            os.makedirs(destlibdir, exist_ok=True)
+
+            # Link to the PDK magic startup file from the target directory
+            startup_script = targetdir + mag_current + pdkname + '-F.magicrc'
+            if not os.path.isfile(startup_script):
+                startup_script = targetdir + mag_current + pdkname + '.magicrc'
+
+            if have_mag_8_2 and os.path.isfile(startup_script):
+                # If the symbolic link exists, remove it.
+                if os.path.isfile(destlibdir + '/.magicrc'):
+                    os.remove(destlibdir + '/.magicrc')
+                os.symlink(startup_script, destlibdir + '/.magicrc')
+ 
+                # Find LEF file names in the source
+                leffiles = os.listdir(srclibdir)
+                leffiles = list(item for item in leffiles if os.path.splitext(item)[1].lower() == '.lef')
+
+                # Get list of abstract views to make from LEF macros
+                lefmacros = []
+                err_no_macros = False
+                for leffile in leffiles:
+                    with open(srclibdir + '/' + leffile, 'r') as ifile:
+                        ltext = ifile.read()
+                        llines = ltext.splitlines()
+                        for lline in llines:
+                            ltok = re.split(' |\t|\(', lline)
+                            if ltok[0] == 'MACRO':
+                                lefmacros.append(ltok[1])
+
+                # Create exclude list with glob-style matching using fnmatch
+                if len(lefmacros) > 0:
+                    lefnames = list(os.path.split(item)[1] for item in lefmacros)
+                    notlefnames = []
+                    for exclude in lef_exclude:
+                        notlefnames.extend(fnmatch.filter(lefnames, exclude))
+
+                    # Apply exclude list
+                    if len(notlefnames) > 0:
+                        for file in lefmacros[:]:
+                            if os.path.split(file)[1] in notlefnames:
+                                lefmacros.remove(file)
+
+                if len(leffiles) == 0:
+                    print('Warning:  No LEF files found in ' + srclibdir)
+                    continue
+
+                print('Generating conversion script to create magic databases from LEF')
+
+                # Generate a script called "generate_magic.tcl" and leave it in
+                # the target directory.  Use it as input to magic to create the
+                # .mag files from the database.
+
+                with open(destlibdir + '/generate_magic.tcl', 'w') as ofile:
+                    print('#!/usr/bin/env wish', file=ofile)
+                    print('#--------------------------------------------', file=ofile)
+                    print('# Script to generate .mag files from .lef    ', file=ofile)
+                    print('#--------------------------------------------', file=ofile)
+                    print('tech unlock *', file=ofile)
+
+                    # If there are devices in the LEF file that come from the
+                    # PDK library, then copy this list into the script.
+
+                    if pdklibrary:
+                        shortdevlist = []
+                        for macro in lefmacros:
+                            if macro in devlist:
+                                shortdevlist.append(macro)
+
+                        tcldevlist = '{' + ' '.join(shortdevlist) + '}'
+                        print('set devlist ' + tcldevlist, file=ofile)
+
+                    for leffile in leffiles:
+                        print('lef read ' + srclibdir + '/' + leffile, file=ofile)
+
+                    for lefmacro in lefmacros:
+
+                        # To be completed:  Parse SPICE file for port order, make
+                        # sure ports are present and ordered.
+
+                        if pdklibrary and lefmacro in shortdevlist:
+                            print('set cellname ' + lefmacro, file=ofile)
+                            print('if {[lsearch $devlist $cellname] >= 0} {',
+					file=ofile)
+                            print('    load $cellname', file=ofile)
+                            print('    property gencell $cellname', file=ofile)
+                            print('    property parameter m=1', file=ofile)
+                            print('    property library ' + pdklibrary, file=ofile)
+                            print('}', file=ofile)
+
+                    # Load one of the LEF files so that the default (UNNAMED) cell
+                    # is not loaded, then delete (UNNAMED) so it doesn't generate
+                    # an error message.
+                    if len(lefmacros) > 0:
+                        print('load ' + lefmacros[0], file=ofile)
+                        print('cellname delete \(UNNAMED\)', file=ofile)
+                    else:
+                        err_no_macros = True
+                    print('writeall force', file=ofile)
+                    print('puts stdout "Done."', file=ofile)
+                    print('quit -noprompt', file=ofile)
+
+                if err_no_macros == True:
+                    print('Warning:  No LEF macros were defined.')
+
+                print('Running magic to create magic databases from LEF')
+                sys.stdout.flush()
+
+                # Run magic to read in the LEF file and write out magic databases.
+                with open(destlibdir + '/generate_magic.tcl', 'r') as ifile:
+                    mproc = subprocess.run(['magic', '-dnull', '-noconsole'],
+				stdin = ifile, stdout = subprocess.PIPE,
+				stderr = subprocess.PIPE, cwd = destlibdir,
+				universal_newlines = True)
+                    if mproc.stdout:
+                        for line in mproc.stdout.splitlines():
+                            print(line)
+                    if mproc.stderr:
+                        print('Error message output from magic:')
+                        for line in mproc.stderr.splitlines():
+                            print(line)
+                    if mproc.returncode != 0:
+                        print('ERROR:  Magic exited with status ' + str(mproc.returncode))
+
+
+                # Now list all the .mag files generated, and for each, read the
+                # corresponding file from the mag/ directory, pull the GDS file
+                # properties, and add those properties to the maglef view.  Also
+                # read the CDL (or SPICE) netlist, read the ports, and rewrite
+                # the port order in the mag and maglef file accordingly.
+
+                # Diagnostic
+                print('Annotating files in ' + destlibdir)
+                sys.stdout.flush()
+                magfiles = os.listdir(destlibdir)
+                magfiles = list(item for item in magfiles if os.path.splitext(item)[1] == '.mag')
+                for magroot in magfiles:
+                    magname = os.path.splitext(magroot)[0]
+                    magfile = maglibdir + '/' + magroot
+                    magleffile = destlibdir + '/' + magroot
+                    prop_lines = get_gds_properties(magfile)
+
+                    # Make sure properties include the Tcl generated cell
+                    # information from the PDK script
+
+                    prop_gencell = []
+                    if pdklibrary:
+                        if magname in fixedlist:
+                            prop_gencell.append('gencell ' + magname)
+                            prop_gencell.append('library ' + pdklibrary)
+                            prop_gencell.append('parameter m=1')
+
+                    nprops = len(prop_lines) + len(prop_gencell)
+
+                    cdlfile = cdllibdir + '/' + magname + '.cdl'
+                    if os.path.exists(cdlfile):
+                        cdlfiles = [cdlfile]
+                    else:
+                        # Assume there is at least one file with all cell subcircuits
+                        # in it.
+                        try:
+                            cdlfiles = glob.glob(cdllibdir + '/*.cdl')
+                        except:
+                            pass
+                    if len(cdlfiles) > 0:
+                        for cdlfile in cdlfiles:
+                            port_dict = get_subckt_ports(cdlfile, magname)
+                            if port_dict != {}:
+                                break
+                    else:
+                        port_dict = {}
+
+                    if port_dict == {}:
+                        print('No CDL file contains ' + destlib + ' device ' + magname)
+                        cdlfile = None
+                        # To be done:  If destlib is 'primitive', then look in
+                        # SPICE models for port order.
+                        if destlib == 'primitive':
+                            print('Fix me:  Need to look in SPICE models!')
+
+                    proprex = re.compile('<< properties >>')
+                    endrex = re.compile('<< end >>')
+                    rlabrex = re.compile('rlabel[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+([^ \t]+)')
+                    flabrex = re.compile('flabel[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+([^ \t]+)')
+                    portrex = re.compile('port[ \t]+([^ \t]+)[ \t]+(.*)')
+                    gcellrex = re.compile('string gencell')
+                    portnum = -1
+
+                    with open(magleffile, 'r') as ifile:
+                        magtext = ifile.read().splitlines()
+
+                    with open(magleffile, 'w') as ofile:
+                        has_props = False
+                        is_gencell = False
+                        for line in magtext:
+                            tmatch = portrex.match(line)
+                            if tmatch:
+                                if portnum >= 0:
+                                    line = 'port ' + str(portnum) + ' ' + tmatch.group(2)
+                                else:
+                                    line = 'port ' + tmatch.group(1) + ' ' + tmatch.group(2)
+                            ematch = endrex.match(line)
+                            if ematch and nprops > 0:
+                                if not has_props:
+                                    print('<< properties >>', file=ofile)
+                                if not is_gencell:
+                                    for prop in prop_gencell:
+                                        print('string ' + prop, file=ofile)
+                                for prop in prop_lines:
+                                    print('string ' + prop, file=ofile)
+
+                            print(line, file=ofile)
+                            pmatch = proprex.match(line)
+                            if pmatch:
+                                has_props = True
+
+                            gmatch = gcellrex.match(line)
+                            if gmatch:
+                                is_gencell = True
+
+                            lmatch = flabrex.match(line)
+                            if not lmatch:
+                                lmatch = rlabrex.match(line)
+                            if lmatch:
+                                labname = lmatch.group(1).lower()
+                                try:
+                                    portnum = port_dict[labname]
+                                except:
+                                    portnum = -1
+
+                    if os.path.exists(magfile):
+                        with open(magfile, 'r') as ifile:
+                            magtext = ifile.read().splitlines()
+
+                        with open(magfile, 'w') as ofile:
+                            for line in magtext:
+                                tmatch = portrex.match(line)
+                                if tmatch:
+                                    if portnum >= 0:
+                                        line = 'port ' + str(portnum) + ' ' + tmatch.group(2)
+                                    else:
+                                        line = 'port ' + tmatch.group(1) + ' ' + tmatch.group(2)
+                                ematch = endrex.match(line)
+                                print(line, file=ofile)
+                                lmatch = flabrex.match(line)
+                                if not lmatch:
+                                    lmatch = rlabrex.match(line)
+                                if lmatch:
+                                    labname = lmatch.group(1).lower()
+                                    try:
+                                        portnum = port_dict[labname]
+                                    except:
+                                        portnum = -1
+                    elif os.path.splitext(magfile)[1] == '.mag':
+                        # NOTE:  Possibly this means the GDS cell has a different name.
+                        print('Error: No file ' + magfile + '.  Why is it in maglef???')
+
+            elif not have_mag_8_2:
+                print('The installer is not able to run magic.')
+            else:
+                print("Master PDK magic startup file not found.  Did you install")
+                print("PDK tech files before PDK vendor files?")
+
+    # If SPICE or CDL databases were specified, then convert them to
+    # a form that can be used by ngspice, using the cdl2spi.py script 
+
+    if have_spice:
+        if ef_format:
+            if not os.path.isdir(targetdir + cdl_reflib + 'spi'):
+                os.makedirs(targetdir + cdl_reflib + 'spi', exist_ok=True)
+
+    elif have_cdl and not no_cdl_convert:
+        if ef_format:
+            if not os.path.isdir(targetdir + cdl_reflib + 'spi'):
+                os.makedirs(targetdir + cdl_reflib + 'spi', exist_ok=True)
+
+        print("Migrating CDL netlists to SPICE.")
+        sys.stdout.flush()
+
+        if ef_format:
+            destdir = targetdir + cdl_reflib + 'spi'
+            srcdir = targetdir + cdl_reflib + 'cdl'
+            os.makedirs(destdir, exist_ok=True)
+
+        # For each library, create the library subdirectory
+        for library in libraries:
+            if len(library) == 3:
+                destlib = library[2]
+            else:
+                destlib = library[1]
+
+            if ef_format:
+                destlibdir = destdir + '/' + destlib
+                srclibdir = srcdir + '/' + destlib
+            else:
+                destdir = targetdir + cdl_reflib + destlib + '/spice'
+                srcdir = targetdir + cdl_reflib + destlib + '/cdl'
+
+                destlibdir = destdir
+                srclibdir = srcdir
+
+            os.makedirs(destlibdir, exist_ok=True)
+
+            # Find CDL file names in the source
+            # If CDL is marked compile-only then ONLY convert <distdir>.cdl
+            if cdl_compile_only:
+                alllibname = destlibdir + '/' + destlib + '.cdl'
+                if not os.path.exists(alllibname):
+                    cdl_compile_only = False
+                else:
+                    cdlfiles = [alllibname]
+
+            if not cdl_compile_only:
+                cdlfiles = os.listdir(srclibdir)
+                cdlfiles = list(item for item in cdlfiles if os.path.splitext(item)[1].lower() == '.cdl')
+
+            # The directory with scripts should be in ../common with respect
+            # to the Makefile that determines the cwd.
+            scriptdir = os.path.split(os.getcwd())[0] + '/common'
+
+            # Run cdl2spi.py script to read in the CDL file and write out SPICE
+            for cdlfile in cdlfiles:
+                if ef_format:
+                    spiname = os.path.splitext(cdlfile)[0] + '.spi'
+                else:
+                    spiname = os.path.splitext(cdlfile)[0] + '.spice'
+                procopts = [scriptdir + '/cdl2spi.py', srclibdir + '/' + cdlfile, destlibdir + '/' + spiname]
+                if do_cdl_scaleu:
+                    procopts.append('-dscale=u')
+                for item in ignorelist:
+                    procopts.append('-ignore=' + item)
+
+                print('Running (in ' + destlibdir + '): ' + ' '.join(procopts))
+                pproc = subprocess.run(procopts,
+			stdin = subprocess.DEVNULL, stdout = subprocess.PIPE,
+			stderr = subprocess.PIPE, cwd = destlibdir,
+			universal_newlines = True)
+                if pproc.stdout:
+                    for line in pproc.stdout.splitlines():
+                        print(line)
+                if pproc.stderr:
+                    print('Error message output from cdl2spi.py:')
+                    for line in pproc.stderr.splitlines():
+                        print(line)
+
+    elif have_gds and not no_gds_convert:
+        # If neither SPICE nor CDL formats is available in the source, then
+        # read GDS;  if the result has no ports, then read the corresponding
+        # LEF library to get port information.  Then write out a SPICE netlist
+        # for the whole library.  NOTE:  If there is no CDL or SPICE source,
+        # then the port numbering is arbitrary, and becomes whatever the
+        # output of this script makes it.
+
+        if ef_format:
+            destdir = targetdir + cdl_reflib + 'spi'
+            srcdir = targetdir + gds_reflib + 'gds'
+            lefdir = targetdir + lef_reflib + 'lef'
+            os.makedirs(destdir, exist_ok=True)
+
+        # For each library, create the library subdirectory
+        for library in libraries:
+            if len(library) == 3:
+                destlib = library[2]
+            else:
+                destlib = library[1]
+
+            if ef_format:
+                destlibdir = destdir + '/' + destlib
+                srclibdir = srcdir + '/' + destlib
+                leflibdir = lefdir + '/' + destlib
+            else:
+                destdir = targetdir + cdl_reflib + destlib + '/spice'
+                srcdir = targetdir + gds_reflib + destlib + '/gds'
+                lefdir = targetdir + lef_reflib + destlib + '/lef'
+
+                destlibdir = destdir
+                srclibdir = srcdir
+                leflibdir = lefdir
+
+            os.makedirs(destlibdir, exist_ok=True)
+
+            # Link to the PDK magic startup file from the target directory
+            startup_script = targetdir + mag_current + pdkname + '-F.magicrc'
+            if not os.path.isfile(startup_script):
+                startup_script = targetdir + mag_current + pdkname + '.magicrc'
+            if os.path.isfile(startup_script):
+                # If the symbolic link exists, remove it.
+                if os.path.isfile(destlibdir + '/.magicrc'):
+                    os.remove(destlibdir + '/.magicrc')
+                os.symlink(startup_script, destlibdir + '/.magicrc')
+
+            # Get the consolidated GDS library file, or a list of all GDS files
+            # if there is no single consolidated library
+
+            allgdslibname = srclibdir + '/' + destlib + '.gds'
+            if not os.path.isfile(allgdslibname):
+                glist = glob.glob(srclibdir + '/*.gds')
+                glist.extend(glob.glob(srclibdir + '/*.gdsii'))
+                glist.extend(glob.glob(srclibdir + '/*.gds2'))
+
+            allleflibname = leflibdir + '/' + destlib + '.lef'
+            if not os.path.isfile(allleflibname):
+                llist = glob.glob(leflibdir + '/*.lef')
+
+            print('Creating magic generation script to generate SPICE library.') 
+            with open(destlibdir + '/generate_magic.tcl', 'w') as ofile:
+                print('#!/usr/bin/env wish', file=ofile)
+                print('#---------------------------------------------', file=ofile)
+                print('# Script to generate SPICE library from GDS   ', file=ofile)
+                print('#---------------------------------------------', file=ofile)
+                print('drc off', file=ofile)
+                print('gds readonly true', file=ofile)
+                print('gds flatten true', file=ofile)
+                print('gds rescale false', file=ofile)
+                print('tech unlock *', file=ofile)
+
+                if not os.path.isfile(allgdslibname):
+                    for gdsfile in glist:
+                        print('gds read ' + gdsfile, file=ofile)
+                else:
+                    print('gds read ' + allgdslibname, file=ofile)
+
+                if not os.path.isfile(allleflibname):
+                    # Annotate the cells with information from the LEF files
+                    for leffile in llist:
+                        print('lef read ' + leffile, file=ofile)
+                else:
+                    print('lef read ' + allleflibname, file=ofile)
+
+                # Load first file and remove the (UNNAMED) cell
+                if not os.path.isfile(allgdslibname):
+                    print('load ' + os.path.splitext(glist[0])[0], file=ofile)
+                else:
+                    gdslibroot = os.path.split(allgdslibname)[1]
+                    print('load ' + os.path.splitext(gdslibroot)[0], file=ofile)
+                print('cellname delete \(UNNAMED\)', file=ofile)
+
+                print('ext2spice lvs', file=ofile)
+
+                # NOTE:  Leaving "subcircuit top" as "auto" (default) can cause
+                # cells like decap that have no I/O to be output without a subcircuit
+                # wrapper.  Also note that if this happens, it is an indication that
+                # power supplies have not been labeled as ports, which is harder to
+                # handle and should be fixed in the source.
+                print('ext2spice subcircuit top on', file=ofile)
+
+                print('ext2spice cthresh 0.1', file=ofile)
+
+                if os.path.isfile(allgdslibname):
+                    print('select top cell', file=ofile)
+                    print('set glist [cellname list children]', file=ofile)
+                    print('foreach cell $glist {', file=ofile)
+                else:
+                    print('foreach cell [cellname list top] {', file=ofile)
+
+                print('    load $cell', file=ofile)
+                print('    puts stdout "Extracting cell $cell"', file=ofile)
+                print('    extract all', file=ofile)
+                print('    ext2spice', file=ofile)
+                print('}', file=ofile)
+                print('puts stdout "Done."', file=ofile)
+                print('quit -noprompt', file=ofile)
+
+            # Run magic to read in the individual GDS files and
+            # write out the consolidated GDS library
+
+            print('Running magic to create GDS library.')
+            sys.stdout.flush()
+
+            mproc = subprocess.run(['magic', '-dnull', '-noconsole',
+				destlibdir + '/generate_magic.tcl'],
+				stdin = subprocess.DEVNULL,
+				stdout = subprocess.PIPE,
+				stderr = subprocess.PIPE, cwd = destlibdir,
+				universal_newlines = True)
+            if mproc.stdout:
+                for line in mproc.stdout.splitlines():
+                    print(line)
+            if mproc.stderr:
+                print('Error message output from magic:')
+                for line in mproc.stderr.splitlines():
+                    print(line)
+            if mproc.returncode != 0:
+                print('ERROR:  Magic exited with status ' + str(mproc.returncode))
+
+            # Remove intermediate extraction files
+            extfiles = glob.glob(destlibdir + '/*.ext')
+            for extfile in extfiles:
+                os.remove(extfile)
+
+            # If the GDS file was a consolidated file of all cells, then
+            # create a similar SPICE library of all cells.
+
+            if os.path.isfile(allgdslibname):
+                spiext = '.spice' if not ef_format else '.spi'
+                create_spice_library(destlibdir, destlib, spiext, do_compile_only, do_stub, excludelist)
+
+    sys.exit(0)
diff --git a/common/insert_property.py b/common/insert_property.py
new file mode 100755
index 0000000..1ee5687
--- /dev/null
+++ b/common/insert_property.py
@@ -0,0 +1,133 @@
+#!/usr/bin/env python3
+#
+# insert_property.py:  For the given install path, library name, and cellname,
+# find the Magic layout of the cell, and add the specified property string.
+# If the property exists and is the same as specified, then it remains the
+# same.  If the property exists but has a different value, it is replaced.
+# The property is added to the layout in both the mag/ (full) and maglef/
+# (abstract) directories.  Option "-maglef" or "-mag" will restrict the
+# use to only the view indicated by the option.
+# 
+# e.g.:
+#
+# insert_property.py /home/tim/projects/efabless/tech/SkyWater/EFS8A \
+#	s8iom0 s8iom0s8_top_gpio "FIXED_BBOX 0 607 15000 40200"
+
+import os
+import re
+import sys
+
+def addprop(filename, propstring, noupdate):
+    with open(filename, 'r') as ifile:
+        magtext = ifile.read().splitlines() 
+
+    propname = propstring.split()[0]
+    proprex = re.compile('<< properties >>')
+    endrex = re.compile('<< end >>')
+
+    in_props = False
+    printed = False
+    done = False
+
+    with open(filename, 'w') as ofile:
+        for line in magtext:
+            pmatch = proprex.match(line)
+            if pmatch:
+                in_props = True
+            elif in_props:
+                linetok = line.split()
+                if linetok[0] == 'string':
+                    testname = linetok[1]
+                    testval = linetok[2]
+                    if testname == propname:
+                        if noupdate == False:
+                            print('string ' + propstring, file=ofile)
+                            printed = True
+                        done = True
+
+            ematch = endrex.match(line)
+            if ematch:
+                if in_props == False:
+                    print('<< properties >>', file=ofile)
+                if done == False:
+                    print('string ' + propstring, file=ofile)
+
+            if not printed:
+                print(line, file=ofile)
+            printed = False
+
+def usage():
+    print("insert_property.py <path_to_pdk> <libname> <cellname> <prop_string> [option]")
+    print("  options:")
+    print("   -mag      do only for the view in the mag/ directory")
+    print("   -maglef   do only for the view in the maglef/ directory")
+    print("   -noupdate do not replace the property if it already exists in the file")
+    return 0
+
+if __name__ == '__main__':
+
+    options = []
+    arguments = []
+    for item in sys.argv[1:]:
+        if item.find('-', 0) == 0:
+            options.append(item)
+        else:
+            arguments.append(item)
+
+    if len(arguments) < 4:
+        print("Not enough options given to insert_property.py.")
+        usage()
+        sys.exit(0)
+
+    source = arguments[0]
+    libname = arguments[1]
+    cellname = arguments[2]
+    propstring = arguments[3]
+
+    noupdate = True if '-noupdate' in options else False
+    fail = 0
+
+    efformat = True if '-ef_format' in options else False
+
+    domag = True
+    domaglef = True
+    if '-mag' in options and '-maglef' not in options:
+        domaglef = False
+    if '-maglef' in options and '-mag' not in options:
+        domag = False
+
+    if domag:
+        if efformat:
+            filename = source + '/libs.ref/mag/' + libname + '/' + cellname + '.mag'
+        else:
+            filename = source + '/libs.ref/' + libname + '/mag/' + cellname + '.mag'
+
+        if os.path.isfile(filename):
+            addprop(filename, propstring, noupdate)
+        else:
+            fail += 1
+    else:
+        fail += 1
+
+    if domaglef:
+        if efformat:
+            filename = source + '/libs.ref/maglef/' + libname + '/' + cellname + '.mag'
+        else:
+            filename = source + '/libs.ref/' + libname + '/maglef/' + cellname + '.mag'
+
+        if os.path.isfile(filename):
+            addprop(filename, propstring, noupdate)
+        else:
+            fail += 1
+    else:
+        fail += 1
+
+    if fail == 2:
+        print('Error:  No layout file in either mag/ or maglef/', file=sys.stderr)
+        if efformat:
+            print('(' + source + '/libs.ref/mag[lef]/' + libname +
+		    '/' + cellname + '.mag)', file=sys.stderr)
+        else:
+            print('(' + source + '/libs.ref/' + libname + '/mag[lef]/'
+		    + cellname + '.mag)', file=sys.stderr)
+
diff --git a/common/makestub.py b/common/makestub.py
new file mode 100755
index 0000000..a5334d7
--- /dev/null
+++ b/common/makestub.py
@@ -0,0 +1,122 @@
+#!/usr/bin/env python3
+#
+#-------------------------------------------------------------------
+#  makestub.py
+#
+# Read a CDL or SPICE netlist and remove all contents from subcircuits,
+# leaving only the .SUBCKT ... .ENDS wrapper.  Used as a filter, so it
+# replaces the original file with the modified one.  If the original
+# file is a symbolic link, then it is first unlinked and replaced with
+# the new contents.
+#
+# Use:
+#
+# 	makestub.py <path_to_netlist_file>
+#
+#-------------------------------------------------------------------
+
+import os
+import re
+import sys
+import stat
+import textwrap
+
+def makeuserwritable(filepath):
+    if os.path.exists(filepath):
+        st = os.stat(filepath)
+        os.chmod(filepath, st.st_mode | stat.S_IWUSR)
+
+def generate_stubs(netlist_path, output_path):
+    netlist_dir = os.path.split(netlist_path)[0]
+    netlist_filename = os.path.split(netlist_path)[1]
+    netlist_root = os.path.splitext(netlist_filename)[0]
+    netlist_ext = os.path.splitext(netlist_filename)[1]
+
+    if not os.path.exists(netlist_path):
+        print('Error:  Specified file "' + netlist_path + '" does not exist!')
+        return
+
+    if output_path == None:
+        output_path = netlist_path
+
+    with open(netlist_path, 'r') as ifile:
+        spicetext = ifile.read().splitlines()
+
+    # Remove blank lines and comment lines
+    spicelines = []
+    for line in spicetext:
+        if len(line) > 0:
+            if line[0] != '*':
+                spicelines.append(line)
+
+    # Remove line extensions
+    spicetext = '\n'.join(spicelines)
+    spicelines = spicetext.replace('\n+', ' ').splitlines()
+
+    # SPICE subcircuit definition:
+    subcrex = re.compile(r'[ \t]*\.subckt[ \t]+([^ \t]+)[ \t]+(.*)$', re.IGNORECASE)
+    endsrex = re.compile(r'[ \t]*\.ends[ \t]*', re.IGNORECASE)
+
+    spiceoutlines = []
+
+    insub = False
+    for line in spicelines:
+        if insub:
+            ematch = endsrex.match(line)
+            if ematch:
+                insub = False
+                spiceoutlines.append(line)
+        else:
+            smatch = subcrex.match(line)
+            if smatch:
+                insub = True
+                spiceoutlines.append('')
+                spiceoutlines.append('*----------------------------------------------')
+                spiceoutlines.append('* SPICE stub entry for ' + smatch.group(1) + '.')
+                spiceoutlines.append('*----------------------------------------------')
+                spiceoutlines.append('')
+            spiceoutlines.append(line)
+
+    if output_path == netlist_path:
+        if os.path.islink(netlist_path):
+            os.unlink(netlist_path)
+
+    # Re-wrap continuation lines at 100 characters
+    wrappedlines = []
+    for line in spiceoutlines:
+        wrappedlines.append('\n+ '.join(textwrap.wrap(line, 100)))
+
+    # Just in case the file in the source repo is not user-writable
+    if os.path.exists(output_path):
+        makeuserwritable(output_path)
+
+    with open(output_path, 'w') as ofile:
+        for line in wrappedlines:
+            print(line, file=ofile)
+
+# If called as main, run generate_stubs
+
+if __name__ == '__main__':
+
+    # Divide up command line into options and arguments
+    options = []
+    arguments = []
+    for item in sys.argv[1:]:
+        if item.find('-', 0) == 0:
+            options.append(item)
+        else:
+            arguments.append(item)
+
+    # Need one argument:  path to CDL or SPICE netlist
+    # If two arguments, then 2nd argument is the output file.
+
+    if len(arguments) == 2:
+        netlist_path = arguments[0]
+        output_path = arguments[1]
+        generate_stubs(netlist_path, output_path)
+    elif len(arguments) != 1:
+        print("Usage:  makestub.py <file_path> [<output_path>]")
+    elif len(arguments) == 1:
+        netlist_path = arguments[0]
+        generate_stubs(netlist_path, None)
+
diff --git a/common/orig/foundry_install.py b/common/orig/foundry_install.py
new file mode 100755
index 0000000..96caf14
--- /dev/null
+++ b/common/orig/foundry_install.py
@@ -0,0 +1,1175 @@
+#!/usr/bin/env python3
+#
+# foundry_install.py
+#
+# This file generates the local directory structure and populates the
+# directories with foundry vendor data.
+#
+# Options:
+#    -link_from <type>	Make symbolic links to vendor files from target
+#			Types are: "none", "source", or a PDK name.
+#			Default "none" (copy all files from source)
+#    -ef_names		Use efabless naming (libs.ref/techLEF),
+#			otherwise use generic naming (libs.tech/lef)
+#
+#    -source <path>	Path to source data top level directory
+#    -target <path>	Path to target top level directory
+#
+#
+# All other options represent paths to vendor files.  They may all be
+# wildcarded with "*" to represent, e.g., version number directories,
+# or names of supported libraries.  Where wildcards exist, if there is
+# more than one directory in the path, the value represented by "*"
+# will first be checked against library names.  If no library name is
+# found, then the wildcard value will be assumed to be numeric and
+# separated by either "." or "_" to represent major/minor/sub/...
+# revision numbers (alphanumeric).
+#
+# Note only one of "-spice" or "-cdl" need be specified.  Since the
+# open source tools use ngspice, CDL files are converted to ngspice
+# syntax when needed.
+#
+#	-techlef <path>	Path to technology LEF file
+#	-doc <path>	Path to technology documentation
+#	-lef <path>	Path to LEF file
+#	-lefanno <path>	Path to LEF file (for annotation only)
+#	-spice <path>	Path to SPICE netlists
+#	-cdl <path>	Path to CDL netlists
+#	-models <path>	Path to SPICE (primitive device) models
+#	-liberty <path>	Path to Liberty timing files
+#	-gds <path>	Path to GDS data
+#	-verilog <path>	Path to verilog models
+#
+#	-library <type> <name> [<target>]	See below
+#
+# For the "-library" option, any number of libraries may be supported, and
+# one "-library" option should be provided for each supported library.
+# <type> is one of:  "digital", "primitive", or "general".  Analog and I/O
+# libraries fall under the category "general", as they are all treated the
+# same way.  <name> is the vendor name of the library.  [<target>] is the
+# (optional) local name of the library.  If omitted, then the vendor name
+# is used for the target (there is no particular reason to specify a
+# different local name for a library).
+#
+# All options "-lef", "-spice", etc., can take the additional arguments
+# 	up  <number>
+#
+# to indicate that the source hierarchy should be copied from <number>
+# levels above the files.  For example, if liberty files are kept in
+# multiple directories according to voltage level, then
+#
+# 	-liberty x/y/z/PVT_*/*.lib
+#
+# would install all .lib files directly into libs.ref/lef/<libname>/*.lib
+# while
+#
+# 	-liberty x/y/z/PVT_*/*.lib up 1
+#
+# would install all .lib files into libs.ref/lef/PVT_*/<libname>/*.lib
+#
+# Other library-specific arguments are:
+#
+#	nospec	:  Remove timing specification before installing
+#		    (used with verilog files;  needs to be extended to
+#		    liberty files)
+#	compile :  Create a single library from all components.  Used
+#		    when a foundry library has inconveniently split
+#		    an IP library (LEF, CDL, verilog, etc.) into
+#		    individual files.
+#
+# NOTE:  This script can be called once for all libraries if all file
+# types (gds, cdl, lef, etc.) happen to all work with the same wildcards.
+# However, it is more likely that it will be called several times for the
+# same PDK, once to install I/O cells, once to install digital, and so
+# forth, as made possible by the wild-carding.
+
+import re
+import os
+import sys
+import glob
+import shutil
+import subprocess
+
+def usage():
+    print("foundry_install.py [options...]")
+    print("   -link_from <name> Make symbolic links from target to <name>")
+    print("                     where <name> can be 'source' or a PDK name.")
+    print("                     Default behavior is to copy all files.")
+    print("   -copy             Copy files from source to target (default)")
+    print("   -ef_names         Use efabless naming conventions for local directories")
+    print("")
+    print("   -source <path>    Path to top of source directory tree")
+    print("   -target <path>    Path to top of target directory tree")
+    print("")
+    print("   -techlef <path>   Path to technology LEF file")
+    print("   -doc <path>       Path to technology documentation")
+    print("   -lef <path>       Path to LEF file")
+    print("   -lefanno <path>   Path to LEF file (for annotation only)")
+    print("   -spice <path>     Path to SPICE netlists")
+    print("   -cdl <path>       Path to CDL netlists")
+    print("   -models <path>    Path to SPICE (primitive device) models")
+    print("   -lib <path>       Path to Liberty timing files")
+    print("   -liberty <path>       Path to Liberty timing files")
+    print("   -gds <path>       Path to GDS data")
+    print("   -verilog <path>   Path to verilog models")
+    print("   -library <type> <name> [<target>]	 See below")
+    print("")
+    print(" All <path> names may be wild-carded with '*' ('glob'-style wild-cards)")
+    print("")
+    print(" All options with <path> other than source and target may take the additional")
+    print(" arguments 'up <number>', where <number> indicates the number of levels of")
+    print(" hierarchy of the source path to include when copying to the target.")
+    print("")
+    print(" Library <type> may be one of:")
+    print("    digital		Digital standard cell library")
+    print("    primitive	Primitive device library")
+    print("    general		All other library types (I/O, analog, etc.)")
+    print("")
+    print(" If <target> is unspecified then <name> is used for the target.")
+
+def get_gds_properties(magfile):
+    proprex = re.compile('^[ \t]*string[ \t]+(GDS_[^ \t]+)[ \t]+([^ \t]+)$')
+    proplines = []
+    if os.path.isfile(magfile):
+        with open(magfile, 'r') as ifile:
+            magtext = ifile.read().splitlines()
+            for line in magtext:
+                lmatch = proprex.match(line)
+                if lmatch:
+                    propline = lmatch.group(1) + ' ' + lmatch.group(2)
+                    proplines.append(propline)
+    return proplines
+
+# Read subcircuit ports from a CDL file, given a subcircuit name that should
+# appear in the file as a subcircuit entry, and return a dictionary of ports
+# and their indexes in the subcircuit line.
+
+def get_subckt_ports(cdlfile, subname):
+    portdict = {}
+    pidx = 1
+    portrex = re.compile('^\.subckt[ \t]+([^ \t]+)[ \t]+(.*)$', re.IGNORECASE)
+    with open(cdlfile, 'r') as ifile:
+        cdltext = ifile.read()
+        cdllines = cdltext.replace('\n+', ' ').splitlines()
+        for line in cdllines:
+            lmatch = portrex.match(line)
+            if lmatch:
+                if lmatch.group(1).lower() == subname.lower():
+                    ports = lmatch.group(2).split()
+                    for port in ports:
+                        portdict[port.lower()] = pidx
+                        pidx += 1
+                    break
+    return portdict
+
+# Filter a verilog file to remove any backslash continuation lines, which
+# iverilog does not parse.  If targetroot is a directory, then find and
+# process all files in the path of targetroot.  If any file to be processed
+# is unmodified (has no backslash continuation lines), then ignore it.  If
+# any file is a symbolic link and gets modified, then remove the symbolic
+# link before overwriting with the modified file.
+#
+# If 'do_remove_spec' is True, then remove timing information from the file,
+# which is everything between the keywords "specify" and "endspecify".
+
+def vfilefilter(vfile, do_remove_spec):
+    modified = False
+    with open(vfile, 'r') as ifile:
+        vtext = ifile.read()
+
+    # Remove backslash-followed-by-newline and absorb initial whitespace.  It
+    # is unclear what initial whitespace means in this context, as the use-
+    # case that has been seen seems to work under the assumption that leading
+    # whitespace is ignored up to the amount used by the last indentation.
+
+    vlines = re.sub('\\\\\n[ \t]*', '', vtext)
+
+    if do_remove_spec:
+        specrex = re.compile('\n[ \t]*specify[ \t\n]+')
+        endspecrex = re.compile('\n[ \t]*endspecify')
+        smatch = specrex.search(vlines)
+        while smatch:
+            specstart = smatch.start()
+            specpos = smatch.end()
+            ematch = endspecrex.search(vlines[specpos:])
+            specend = ematch.end()
+            vtemp = vlines[0:specstart + 1] + vlines[specpos + specend + 1:]
+            vlines = vtemp
+            smatch = specrex.search(vlines)
+
+    if vlines != vtext:
+        # File contents have been modified, so if this file was a symbolic
+        # link, then remove it.  Otherwise, overwrite the file with the
+        # modified contents.
+        if os.path.islink(vfile):
+            os.unlink(vfile)
+        with open(vfile, 'w') as ofile:
+            ofile.write(vlines)
+
+# Run a filter on verilog files that cleans up known syntax issues.
+# This is embedded in the foundry_install script and is not a custom
+# filter largely because the issues are in the tool, not the PDK.
+
+def vfilter(targetroot, do_remove_spec):
+    if os.path.isfile(targetroot):
+        vfilefilter(targetroot, do_remove_spec)
+    else:
+        vlist = glob.glob(targetroot + '/*')
+        for vfile in vlist:
+            if os.path.isfile(vfile):
+                vfilefilter(vfile, do_remove_spec)
+
+# For issues that are PDK-specific, a script can be written and put in
+# the PDK's custom/scripts/ directory, and passed to the foundry_install
+# script using the "filter" option.
+
+def tfilter(targetroot, filterscript):
+    if os.path.isfile(targetroot):
+        print('   Filtering file ' + targetroot)
+        subprocess.run([filterscript, targetroot, targetroot],
+			stdin = subprocess.DEVNULL, stdout = subprocess.PIPE,
+			stderr = subprocess.PIPE, universal_newlines = True)
+    else:
+        tlist = glob.glob(targetroot + '/*')
+        for tfile in tlist:
+            if os.path.isfile(tfile):
+                print('   Filtering file ' + tfile)
+                subprocess.run([filterscript, tfile, tfile],
+			stdin = subprocess.DEVNULL, stdout = subprocess.PIPE,
+			stderr = subprocess.PIPE, universal_newlines = True)
+
+# This is the main entry point for the foundry install script.
+
+if __name__ == '__main__':
+
+    if len(sys.argv) == 1:
+        print("No options given to foundry_install.py.")
+        usage()
+        sys.exit(0)
+    
+    optionlist = []
+    newopt = []
+
+    sourcedir = None
+    targetdir = None
+    link_from = None
+
+    ef_names = False
+
+    have_lef = False
+    have_lefanno = False
+    have_gds = False
+    have_spice = False
+    have_cdl = False
+    ignorelist = []
+
+    do_install = True
+
+    # Break arguments into groups where the first word begins with "-".
+    # All following words not beginning with "-" are appended to the
+    # same list (optionlist).  Then each optionlist is processed.
+    # Note that the first entry in optionlist has the '-' removed.
+
+    for option in sys.argv[1:]:
+        if option.find('-', 0) == 0:
+            if newopt != []:
+                optionlist.append(newopt)
+                newopt = []
+            newopt.append(option[1:])
+        else:
+            newopt.append(option)
+
+    if newopt != []:
+        optionlist.append(newopt)
+
+    # Pull library names from optionlist
+    libraries = []
+    for option in optionlist[:]:
+        if option[0] == 'library':
+            optionlist.remove(option)
+            libraries.append(option[1:]) 
+
+    # Check for option "ef_names" or "std_names"
+    for option in optionlist[:]:
+        if option[0] == 'ef_naming' or option[0] == 'ef_names':
+            optionlist.remove(option)
+            ef_names = True
+        elif option[0] == 'std_naming' or option[0] == 'std_names':
+            optionlist.remove(option)
+            ef_names = False
+        elif option[0] == 'uninstall':
+            optionlist.remove(option)
+            do_install = False
+
+    # Check for options "link_from", "source", and "target"
+    link_name = None
+    for option in optionlist[:]:
+        if option[0] == 'link_from':
+            optionlist.remove(option)
+            if option[1].lower() == 'none':
+                link_from = None
+            elif option[1].lower() == 'source':
+                link_from = 'source'
+            else:
+                link_from = option[1]
+                link_name = os.path.split(link_from)[1]
+        elif option[0] == 'source':
+            optionlist.remove(option)
+            sourcedir = option[1]
+        elif option[0] == 'target':
+            optionlist.remove(option)
+            targetdir = option[1]
+
+    # Error if no source or dest specified
+    if not sourcedir:
+        print("No source directory specified.  Exiting.")
+        sys.exit(1)
+
+    if not targetdir:
+        print("No target directory specified.  Exiting.")
+        sys.exit(1)
+
+    # If link source is a PDK name, if it has no path, then pull the
+    # path from the target name.
+
+    if link_from:
+        if link_from != 'source':
+            if link_from.find('/', 0) < 0:
+                target_root = os.path.split(targetdir)[0]
+                link_from = target_root + '/' + link_from
+                link_name = link_from
+        else:
+            # If linking from source, convert the source path to an
+            # absolute pathname.
+            sourcedir = os.path.abspath(sourcedir)
+
+    # Take the target PDK name from the target path last component
+    pdkname = os.path.split(targetdir)[1]
+
+    # checkdir is the DIST target directory for the PDK pointed
+    # to by link_name.  Files must be found there before creating
+    # symbolic links to the (not yet existing) final install location.
+
+    if link_name:
+        checkdir = os.path.split(targetdir)[0] + '/' + link_name
+    else:
+        checkdir = ''
+
+    # Diagnostic
+    if do_install:
+        print("Installing in target directory " + targetdir)
+
+    # Create the top-level directories
+
+    os.makedirs(targetdir, exist_ok=True)
+    os.makedirs(targetdir + '/libs.ref', exist_ok=True)
+    os.makedirs(targetdir + '/libs.tech', exist_ok=True)
+
+    # Path to magic techfile depends on ef_names
+
+    if ef_names == True:
+        mag_current = '/libs.tech/magic/current/'
+    else:
+        mag_current = '/libs.tech/magic/'
+
+    # Populate the techLEF and SPICE models, if specified.
+
+    for option in optionlist[:]:
+        if option[0] == 'techlef':
+            filter_script = None
+            for item in option:
+                if item.split('=')[0] == 'filter':
+                    filter_script = item.split('=')[1]
+                    break
+
+            if ef_names == True:
+                techlefdir = targetdir + '/libs.ref/techLEF'
+                checklefdir = checkdir + '/libs.ref/techLEF'
+                if link_from:
+                    linklefdir = link_from + '/libs.ref/techLEF'
+                else:
+                    linklefdir = ''
+            else:
+                techlefdir = targetdir + '/libs.tech/lef'
+                checklefdir = checkdir + '/libs.tech/lef'
+                if link_from:
+                    linklefdir = link_from + '/libs.tech/lef'
+                else:
+                    linklefdir = ''
+            os.makedirs(techlefdir, exist_ok=True)
+            # All techlef files should be linked or copied, so use "glob"
+            # on the wildcards
+            techlist = glob.glob(sourcedir + '/' + option[1])
+
+            for lefname in techlist:
+                leffile = os.path.split(lefname)[1]
+                targname = techlefdir + '/' + leffile
+                checklefname = checklefdir + '/' + leffile
+                linklefname = linklefdir + '/' + leffile
+                # Remove any existing file(s)
+                if os.path.isfile(targname):
+                    os.remove(targname)
+                elif os.path.islink(targname):
+                    os.unlink(targname)
+                elif os.path.isdir(targname):
+                    shutil.rmtree(targname)
+
+                if do_install:
+                    if not link_from:
+                        if os.path.isfile(lefname):
+                            shutil.copy(lefname, targname)
+                        else:
+                            shutil.copytree(lefname, targname)
+                    elif link_from == 'source':
+                        os.symlink(lefname, targname)
+                    else:
+                        if os.path.exists(checklefname):
+                            os.symlink(linklefname, targname)
+                        elif os.path.isfile(lefname):
+                            shutil.copy(lefname, targname)
+                        else:
+                            shutil.copytree(lefname, targname)
+
+                    if filter_script:
+                        # Apply filter script to all files in the target directory
+                        tfilter(targname, filter_script)
+            optionlist.remove(option)
+
+        elif option[0] == 'models':
+            filter_script = None
+            for item in option:
+                if item.split('=')[0] == 'filter':
+                    filter_script = item.split('=')[1]
+                    break
+
+            print('Diagnostic:  installing models.')
+            modelsdir = targetdir + '/libs.tech/models'
+            checkmoddir = checkdir + '/libs.tech/models'
+            if link_from:
+                linkmoddir = link_from + '/libs.tech/models'
+            else:
+                linkmoddir = ''
+
+            os.makedirs(modelsdir, exist_ok=True)
+
+            # All model files should be linked or copied, so use "glob"
+            # on the wildcards.  Copy each file and recursively copy each
+            # directory.
+            modellist = glob.glob(sourcedir + '/' + option[1])
+
+            for modname in modellist:
+                modfile = os.path.split(modname)[1]
+                targname = modelsdir + '/' + modfile
+                checkmodname = checkmoddir + '/' + modfile
+                linkmodname = linkmoddir + '/' + modfile
+
+                if os.path.isdir(modname):
+                    # Remove any existing directory, and its contents
+                    if os.path.isdir(targname):
+                        shutil.rmtree(targname)
+                    os.makedirs(targname)
+
+                    # Recursively find and copy or link the whole directory
+                    # tree from this point.
+
+                    allmodlist = glob.glob(modname + '/**', recursive=True)
+                    commonpart = os.path.commonpath(allmodlist)
+                    for submodname in allmodlist:
+                        if os.path.isdir(submodname):
+                            continue
+                        # Get the path part that is not common between modlist and
+                        # allmodlist.
+                        subpart = os.path.relpath(submodname, commonpart)
+                        subtargname = targname + '/' + subpart
+                        os.makedirs(os.path.split(subtargname)[0], exist_ok=True)
+                        if do_install:
+                            if not link_from:
+                                if os.path.isfile(submodname):
+                                    shutil.copy(submodname, subtargname)
+                                else:
+                                    shutil.copytree(submodname, subtargname)
+                            elif link_from == 'source':
+                                os.symlink(submodname, subtargname)
+                            else:
+                                if os.path.exists(checkmodname):
+                                    os.symlink(linkmodname, subtargname)
+                                elif os.path.isfile(submodname):
+                                    shutil.copy(submodname, subtargname)
+                                else:
+                                    shutil.copytree(submodname, subtargname)
+                        
+                            if filter_script:
+                                # Apply filter script to all files in the target directory
+                                tfilter(targname, filter_script)
+
+                else:
+                    # Remove any existing file
+                    if os.path.isfile(targname):
+                        os.remove(targname)
+                    elif os.path.islink(targname):
+                        os.unlink(targname)
+                    elif os.path.isdir(targname):
+                        shutil.rmtree(targname)
+
+                    if do_install:
+                        if not link_from:
+                            if os.path.isfile(modname):
+                                shutil.copy(modname, targname)
+                            else:
+                                shutil.copytree(modname, targname)
+                        elif link_from == 'source':
+                            os.symlink(modname, targname)
+                        else:
+                            if os.path.isfile(checkmodname):
+                                os.symlink(linkmodname, targname)
+                            elif os.path.isfile(modname):
+                                shutil.copy(modname, targname)
+                            else:
+                                shutil.copytree(modname, targname)
+
+                        if filter_script:
+                            # Apply filter script to all files in the target directory
+                            tfilter(targname, filter_script)
+
+            optionlist.remove(option)
+
+    # The remaining options in optionlist should all be types like 'lef' or 'liberty'
+    for option in optionlist[:]:
+        # Diagnostic
+        if do_install:
+            print("Installing option: " + str(option[0]))
+        destdir = targetdir + '/libs.ref/' + option[0]
+        checklibdir = checkdir + '/libs.ref/' + option[0]
+        if link_from:
+            destlinkdir = link_from + '/libs.ref/' + option[0]
+        else:
+            destlinkdir = ''
+        os.makedirs(destdir, exist_ok=True)
+
+        # If the option is followed by the keyword "up" and a number, then
+        # the source should be copied (or linked) from <number> levels up
+        # in the hierarchy (see below).
+
+        if 'up' in option:
+            uparg = option.index('up') 
+            try:
+                hier_up = int(option[uparg + 1])
+            except:
+                print("Non-numeric option to 'up': " + option[uparg + 1])
+                print("Ignoring 'up' option.")
+                hier_up = 0
+        else:
+            hier_up = 0
+
+        filter_script = None
+        for item in option:
+            if item.split('=')[0] == 'filter':
+                filter_script = item.split('=')[1]
+                break
+
+        # Option 'compile' is a standalone keyword ('comp' may be used).
+        do_compile = 'compile' in option or 'comp' in option
+ 
+        # Option 'nospecify' is a standalone keyword ('nospec' may be used).
+        do_remove_spec = 'nospecify' in option or 'nospec' in option
+
+        # Check off things we need to do migration to magic database and
+        # abstact files.
+        if option[0] == 'lef':
+            have_lef = True
+        elif option[0] == 'gds':
+            have_gds = True
+        elif option[0] == 'lefanno':
+            have_lefanno = True
+        elif option[0] == 'spice':
+            have_spice = True
+        elif option[0] == 'cdl':
+            have_cdl = True
+
+        # For each library, create the library subdirectory
+        for library in libraries:
+            if len(library) == 3:
+                destlib = library[2]
+            else:
+                destlib = library[1]
+            destlibdir = destdir + '/' + destlib
+            destlinklibdir = destlinkdir + '/' + destlib
+            checksrclibdir = checklibdir + '/' + destlib
+            os.makedirs(destlibdir, exist_ok=True)
+
+            # Populate the library subdirectory
+            # Parse the option and replace each '/*/' with the library name,
+            # and check if it is a valid directory name.  Then glob the
+            # resulting option name.  Warning:  This assumes that all
+            # occurences of the text '/*/' match a library name.  It should
+            # be possible to wild-card the directory name in such a way that
+            # this is always true.
+
+            testopt = re.sub('\/\*\/', '/' + library[1] + '/', option[1])
+
+            liblist = glob.glob(sourcedir + '/' + testopt)
+
+            # Diagnostic
+            print('Collecting files from ' + str(sourcedir + '/' + testopt))
+            print('Files to install:')
+            if len(liblist) < 10:
+                for item in liblist:
+                    print('   ' + item)
+            else:
+                for item in liblist[0:4]:
+                    print('   ' + item)
+                print('   .')
+                print('   .')
+                print('   .')
+                for item in liblist[-6:-1]:
+                    print('   ' + item)
+                print('(' + str(len(liblist)) + ' files total)')
+
+            for libname in liblist:
+                # Note that there may be a hierarchy to the files in option[1],
+                # say for liberty timing files under different conditions, so
+                # make sure directories have been created as needed.
+
+                libfile = os.path.split(libname)[1]
+                libfilepath = os.path.split(libname)[0]
+                destpathcomp = []
+                for i in range(hier_up):
+                    destpathcomp.append('/' + os.path.split(libfilepath)[1])
+                    libfilepath = os.path.split(libfilepath)[0]
+                destpathcomp.reverse()
+                destpath = ''.join(destpathcomp)
+
+                targname = destlibdir + destpath + '/' + libfile
+
+                # NOTE:  When using "up" with link_from, could just make
+                # destpath itself a symbolic link;  this way is more flexible
+                # but adds one symbolic link per file.
+
+                if destpath != '':
+                    if not os.path.isdir(destlibdir + destpath):
+                        os.makedirs(destlibdir + destpath, exist_ok=True)
+
+                # Both linklibname and checklibname need to contain any hierarchy
+                # implied by the "up" option.
+
+                linklibname = destlinklibdir + destpath + '/' + libfile
+                checklibname = checksrclibdir + destpath + '/' + libfile
+
+                # Remove any existing file
+                if os.path.isfile(targname):
+                    os.remove(targname)
+                elif os.path.islink(targname):
+                    os.unlink(targname)
+                elif os.path.isdir(targname):
+                    shutil.rmtree(targname)
+
+                if do_install:
+                    if not link_from:
+                        if os.path.isfile(libname):
+                            shutil.copy(libname, targname)
+                        else:
+                            shutil.copytree(libname, targname)
+                    elif link_from == 'source':
+                        os.symlink(libname, targname)
+                    else:
+                        if os.path.exists(checklibname):
+                            os.symlink(linklibname, targname)
+                        elif os.path.isfile(libname):
+                            shutil.copy(libname, targname)
+                        else:
+                            shutil.copytree(libname, targname)
+
+                    if option[0] == 'verilog':
+                        # Special handling of verilog files to make them
+                        # syntactically acceptable to iverilog.
+                        # NOTE:  Perhaps this should be recast as a custom filter?
+                        vfilter(targname, do_remove_spec)
+
+                    if filter_script:
+                        # Apply filter script to all files in the target directory
+                        tfilter(targname, filter_script)
+
+            if do_compile == True:
+                # To do:  Extend this option to include formats other than verilog.
+                # Also to do:  Make this compatible with linking from another PDK.
+
+                if option[0] == 'verilog':
+                    # If there is not a single file with all verilog cells in it,
+                    # then compile one, because one does not want to have to have
+                    # an include line for every single cell used in a design.
+
+                    alllibname = destlibdir + '/' + destlib + '.v'
+
+                    print('Diagnostic:  Creating consolidated verilog library ' + destlib + '.v')
+                    vlist = glob.glob(destlibdir + '/*.v')
+                    if alllibname in vlist:
+                        vlist.remove(alllibname)
+
+                    if len(vlist) > 1:
+                        print('New file is:  ' + alllibname)
+                        with open(alllibname, 'w') as ofile:
+                            for vfile in vlist:
+                                with open(vfile, 'r') as ifile:
+                                    # print('Adding ' + vfile + ' to library.')
+                                    vtext = ifile.read()
+                                    # NOTE:  The following workaround resolves an
+                                    # issue with iverilog, which does not properly
+                                    # parse specify timing paths that are not in
+                                    # parentheses.  Easy to work around
+                                    vlines = re.sub(r'\)[ \t]*=[ \t]*([01]:[01]:[01])[ \t]*;', r') = ( \1 ) ;', vtext)
+                                    print(vlines, file=ofile)
+                                print('\n//--------EOF---------\n', file=ofile)
+                    else:
+                        print('Only one file (' + str(vlist) + ');  ignoring "compile" option.')
+
+    print("Completed installation of vendor files.")
+
+    # Now for the harder part.  If GDS and/or LEF databases were specified,
+    # then migrate them to magic (.mag files in layout/ or abstract/).
+
+    ignore = []
+    do_cdl_scaleu = False
+    for option in optionlist[:]:
+        if option[0] == 'cdl':
+            # Option 'scaleu' is a standalone keyword
+            do_cdl_scaleu = 'scaleu' in option
+
+            # Option 'ignore' has arguments after '='
+            for item in option:
+                if item.split('=')[0] == 'ignore':
+                    ignorelist = item.split('=')[1].split(',')
+ 
+    devlist = []
+    pdklibrary = None
+
+    if have_gds:
+        print("Migrating GDS files to layout.")
+        destdir = targetdir + '/libs.ref/mag'
+        srcdir = targetdir + '/libs.ref/gds'
+        os.makedirs(destdir, exist_ok=True)
+
+        # For each library, create the library subdirectory
+        for library in libraries:
+            if len(library) == 3:
+                destlib = library[2]
+            else:
+                destlib = library[1]
+            destlibdir = destdir + '/' + destlib
+            srclibdir = srcdir + '/' + destlib
+            os.makedirs(destlibdir, exist_ok=True)
+
+            # For primitive devices, check the PDK script and find the name
+            # of the library and get a list of supported devices.
+
+            if library[0] == 'primitive':
+                pdkscript = targetdir + mag_current + pdkname + '.tcl'
+                print('Searching for supported devices in PDK script ' + pdkscript + '.')
+
+                if os.path.isfile(pdkscript):
+                    librex = re.compile('^[ \t]*set[ \t]+PDKNAMESPACE[ \t]+([^ \t]+)$')
+                    devrex = re.compile('^[ \t]*proc[ \t]+([^ :\t]+)::([^ \t_]+)_defaults')
+                    fixrex = re.compile('^[ \t]*return[ \t]+\[([^ :\t]+)::fixed_draw[ \t]+([^ \t]+)[ \t]+')
+                    devlist = []
+                    fixedlist = []
+                    with open(pdkscript, 'r') as ifile:
+                        scripttext = ifile.read().splitlines()
+                        for line in scripttext:
+                            lmatch = librex.match(line)
+                            if lmatch:
+                                pdklibrary = lmatch.group(1)
+                            dmatch = devrex.match(line)
+                            if dmatch:
+                                if dmatch.group(1) == pdklibrary:
+                                    devlist.append(dmatch.group(2))
+                            fmatch = fixrex.match(line)
+                            if fmatch:
+                                if fmatch.group(1) == pdklibrary:
+                                    fixedlist.append(fmatch.group(2))
+
+                # Diagnostic
+                print("PDK library is " + str(pdklibrary))
+
+            # Link to the PDK magic startup file from the target directory
+            # If there is no -F version then look for one without -F (open source PDK)
+            startup_script = targetdir + mag_current + pdkname + '-F.magicrc'
+            if not os.path.isfile(startup_script):
+                startup_script = targetdir + mag_current + pdkname + '.magicrc'
+
+            if os.path.isfile(startup_script):
+                # If the symbolic link exists, remove it.
+                if os.path.isfile(destlibdir + '/.magicrc'):
+                    os.remove(destlibdir + '/.magicrc')
+                os.symlink(startup_script, destlibdir + '/.magicrc')
+ 
+                # Find GDS file names in the source
+                print('Getting GDS file list from ' + srclibdir + '.')
+                gdsfiles = os.listdir(srclibdir)
+
+                # Generate a script called "generate_magic.tcl" and leave it in
+                # the target directory.  Use it as input to magic to create the
+                # .mag files from the database.
+
+                print('Creating magic generation script.') 
+                with open(destlibdir + '/generate_magic.tcl', 'w') as ofile:
+                    print('#!/usr/bin/env wish', file=ofile)
+                    print('#--------------------------------------------', file=ofile)
+                    print('# Script to generate .mag files from .gds    ', file=ofile)
+                    print('#--------------------------------------------', file=ofile)
+                    print('gds readonly true', file=ofile)
+                    print('gds flatten true', file=ofile)
+                    # print('gds rescale false', file=ofile)
+                    print('tech unlock *', file=ofile)
+
+                    for gdsfile in gdsfiles:
+                        # Note:  DO NOT use a relative path here.
+                        # print('gds read ../../gds/' + destlib + '/' + gdsfile, file=ofile)
+                        print('gds read ' + srclibdir + '/' + gdsfile, file=ofile)
+
+                        # Make sure properties include the Tcl generated cell
+                        # information from the PDK script
+
+                        if pdklibrary:
+                            tclfixedlist = '{' + ' '.join(fixedlist) + '}'
+                            print('set devlist ' + tclfixedlist, file=ofile)
+                            print('set topcell [lindex [cellname list top] 0]',
+				    file=ofile)
+
+                            print('foreach cellname $devlist {', file=ofile)
+                            print('    load $cellname', file=ofile)
+                            print('    property gencell $cellname', file=ofile)
+                            print('    property parameter m=1', file=ofile)
+                            print('    property library ' + pdklibrary, file=ofile)
+                            print('}', file=ofile)
+                            print('load $topcell', file=ofile)
+
+                    print('writeall force', file=ofile)
+
+                    if have_lefanno:
+                        # Find LEF file names in the source
+                        lefsrcdir = targetdir + '/libs.ref/lefanno'
+                        lefsrclibdir = lefsrcdir + '/' + destlib
+                        leffiles = list(item for item in os.listdir(lefsrclibdir) if os.path.splitext(item)[1] == '.lef')
+
+                    if not have_lef:
+                        # This library has a GDS database but no LEF database.  Use
+                        # magic to create abstract views of the GDS cells.  If
+                        # option "-lefanno" is given, then read the LEF file after
+                        # loading the database file to annotate the cell with
+                        # information from the LEF file.  This usually indicates
+                        # that the LEF file has some weird definition of obstruction
+                        # layers and we want to normalize them by using magic's LEF
+                        # write procedure, but we still need the pin use and class
+                        # information from the LEF file, and maybe the bounding box.
+
+                        print('set maglist [glob *.mag]', file=ofile)
+                        print('foreach name $maglist {', file=ofile)
+                        print('   load [file root $name]', file=ofile)
+                        if have_lefanno:
+                            print('}', file=ofile)
+                            for leffile in leffiles:
+                                print('lef read ' + lefsrclibdir + '/' + leffile, file=ofile)
+                            print('foreach name $maglist {', file=ofile)
+                            print('   load [file root $name]', file=ofile)
+                        print('   lef write [file root $name]', file=ofile)
+                        print('}', file=ofile)
+                    print('quit -noprompt', file=ofile)
+
+                # Run magic to read in the GDS file and write out magic databases.
+                with open(destlibdir + '/generate_magic.tcl', 'r') as ifile:
+                    subprocess.run(['magic', '-dnull', '-noconsole'],
+				stdin = ifile, stdout = subprocess.PIPE,
+				stderr = subprocess.PIPE, cwd = destlibdir,
+				universal_newlines = True)
+
+                if not have_lef:
+                    # Remove the lefanno/ target and its contents.
+                    if have_lefanno:
+                        lefannosrcdir = targetdir + '/libs.ref/lefanno'
+                        if os.path.isdir(lefannosrcdir):
+                            shutil.rmtree(lefannosrcdir)
+
+                    destlefdir = targetdir + '/libs.ref/lef'
+                    destleflibdir = destlefdir + '/' + destlib
+                    os.makedirs(destleflibdir, exist_ok=True)
+                    leflist = list(item for item in os.listdir(destlibdir) if os.path.splitext(item)[1] == '.lef')
+
+                    # All macros will go into one file
+                    destleflib = destleflibdir + '/' + destlib + '.lef'
+                    # Remove any existing library file from the target directory
+                    if os.path.isfile(destleflib):
+                        os.remove(destleflib)
+
+                    first = True
+                    with open(destleflib, 'w') as ofile:
+                        for leffile in leflist:
+                            # Remove any existing single file from the target directory
+                            if os.path.isfile(destleflibdir + '/' + leffile):
+                                os.remove(destleflibdir + '/' + leffile)
+
+                            # Append contents
+                            sourcelef =  destlibdir + '/' + leffile
+                            with open(sourcelef, 'r') as ifile:
+                                leflines = ifile.read().splitlines()
+                                if not first:
+                                    # Remove header from all but the first file
+                                    leflines = leflines[8:]
+                                else:
+                                    first = False
+
+                            for line in leflines:
+                                print(line, file=ofile)
+
+                            # Remove file from the source directory
+                            os.remove(sourcelef)
+
+                    have_lef = True
+
+                # Remove the startup script and generation script
+                os.remove(destlibdir + '/.magicrc')
+                os.remove(destlibdir + '/generate_magic.tcl')
+            else:
+                print("Master PDK magic startup file not found.  Did you install")
+                print("PDK tech files before PDK vendor files?")
+
+    if have_lef:
+        print("Migrating LEF files to layout.")
+        destdir = targetdir + '/libs.ref/maglef'
+        srcdir = targetdir + '/libs.ref/lef'
+        magdir = targetdir + '/libs.ref/mag'
+        cdldir = targetdir + '/libs.ref/cdl'
+        os.makedirs(destdir, exist_ok=True)
+
+        # For each library, create the library subdirectory
+        for library in libraries:
+            if len(library) == 3:
+                destlib = library[2]
+            else:
+                destlib = library[1]
+            destlibdir = destdir + '/' + destlib
+            srclibdir = srcdir + '/' + destlib
+            maglibdir = magdir + '/' + destlib
+            cdllibdir = cdldir + '/' + destlib
+            os.makedirs(destlibdir, exist_ok=True)
+
+            # Link to the PDK magic startup file from the target directory
+            startup_script = targetdir + mag_current + pdkname + '-F.magicrc'
+            if not os.path.isfile(startup_script):
+                startup_script = targetdir + mag_current + pdkname + '.magicrc'
+
+            if os.path.isfile(startup_script):
+                # If the symbolic link exists, remove it.
+                if os.path.isfile(destlibdir + '/.magicrc'):
+                    os.remove(destlibdir + '/.magicrc')
+                os.symlink(startup_script, destlibdir + '/.magicrc')
+ 
+                # Find LEF file names in the source
+                leffiles = os.listdir(srclibdir)
+
+                # Generate a script called "generate_magic.tcl" and leave it in
+                # the target directory.  Use it as input to magic to create the
+                # .mag files from the database.
+
+                with open(destlibdir + '/generate_magic.tcl', 'w') as ofile:
+                    print('#!/usr/bin/env wish', file=ofile)
+                    print('#--------------------------------------------', file=ofile)
+                    print('# Script to generate .mag files from .lef    ', file=ofile)
+                    print('#--------------------------------------------', file=ofile)
+                    print('tech unlock *', file=ofile)
+
+                    if pdklibrary:
+                        tcldevlist = '{' + ' '.join(devlist) + '}'
+                        print('set devlist ' + tcldevlist, file=ofile)
+
+                    for leffile in leffiles:
+
+                        # Okay to use a relative path here.
+                        # print('lef read ' + srclibdir + '/' + leffile', file=ofile)
+                        print('lef read ../../lef/' + destlib + '/' + leffile, file=ofile)
+
+                        # To be completed:  Parse SPICE file for port order, make
+                        # sure ports are present and ordered.
+
+                        if pdklibrary:
+                            print('set cellname [file root ' + leffile + ']', file=ofile)
+                            print('if {[lsearch $devlist $cellname] >= 0} {',
+					file=ofile)
+                            print('    load $cellname', file=ofile)
+                            print('    property gencell $cellname', file=ofile)
+                            print('    property parameter m=1', file=ofile)
+                            print('    property library ' + pdklibrary, file=ofile)
+                            print('}', file=ofile)
+
+                    print('writeall force', file=ofile)
+                    print('quit -noprompt', file=ofile)
+
+                # Run magic to read in the LEF file and write out magic databases.
+                with open(destlibdir + '/generate_magic.tcl', 'r') as ifile:
+                    subprocess.run(['magic', '-dnull', '-noconsole'],
+				stdin = ifile, stdout = subprocess.PIPE,
+				stderr = subprocess.PIPE, cwd = destlibdir,
+				universal_newlines = True)
+
+                # Now list all the .mag files generated, and for each, read the
+                # corresponding file from the mag/ directory, pull the GDS file
+                # properties, and add those properties to the maglef view.  Also
+                # read the CDL (or SPICE) netlist, read the ports, and rewrite
+                # the port order in the mag and maglef file accordingly.
+
+                # Diagnostic
+                print('Annotating files in ' + destlibdir)
+                magfiles = os.listdir(destlibdir)
+                for magroot in magfiles:
+                    magname = os.path.splitext(magroot)[0]
+                    magfile = maglibdir + '/' + magroot
+                    magleffile = destlibdir + '/' + magroot
+                    prop_lines = get_gds_properties(magfile)
+
+                    # Make sure properties include the Tcl generated cell
+                    # information from the PDK script
+
+                    if pdklibrary:
+                        if magname in fixedlist:
+                            prop_lines.append('string gencell ' + magname)
+                            prop_lines.append('string library ' + pdklibrary)
+                            prop_lines.append('string parameter m=1')
+
+                    cdlfile = cdllibdir + '/' + magname + '.cdl'
+                    if not os.path.exists(cdlfile):
+                        # Assume there is one file with all cell subcircuits in it.
+                        try:
+                            cdlfile = glob.glob(cdllibdir + '/*.cdl')[0]
+                        except:
+                            print('No CDL file for ' + destlib + ' device ' + magname)
+                            cdlfile = None
+                            # To be done:  If destlib is 'primitive', then look in
+                            # SPICE models for port order.
+                            if destlib == 'primitive':
+                                print('Fix me:  Need to look in SPICE models!')
+                    if cdlfile:
+                        port_dict = get_subckt_ports(cdlfile, magname)
+                    else:
+                        port_dict = {}
+
+                    proprex = re.compile('<< properties >>')
+                    endrex = re.compile('<< end >>')
+                    rlabrex = re.compile('rlabel[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+([^ \t]+)')
+                    flabrex = re.compile('flabel[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+[^ \t]+[ \t]+([^ \t]+)')
+                    portrex = re.compile('port[ \t]+([^ \t])+[ \t]+(.*)')
+                    portnum = -1
+
+                    with open(magleffile, 'r') as ifile:
+                        magtext = ifile.read().splitlines()
+
+                    with open(magleffile, 'w') as ofile:
+                        for line in magtext:
+                            tmatch = portrex.match(line)
+                            if tmatch:
+                                if portnum >= 0:
+                                    line = 'port ' + str(portnum) + ' ' + tmatch.group(2)
+                                else:
+                                    line = 'port ' + tmatch.group(1) + ' ' + tmatch.group(2)
+                            ematch = endrex.match(line)
+                            if ematch and len(prop_lines) > 0:
+                                print('<< properties >>', file=ofile)
+                                for prop in prop_lines:
+                                    print('string ' + prop, file=ofile)
+
+                            print(line, file=ofile)
+                            pmatch = proprex.match(line)
+                            if pmatch:
+                                for prop in prop_lines:
+                                    print('string ' + prop, file=ofile)
+                                prop_lines = []
+
+                            lmatch = flabrex.match(line)
+                            if not lmatch:
+                                lmatch = rlabrex.match(line)
+                            if lmatch:
+                                labname = lmatch.group(1).lower()
+                                try:
+                                    portnum = port_dict[labname]
+                                except:
+                                    portnum = -1
+
+                    if os.path.exists(magfile):
+                        with open(magfile, 'r') as ifile:
+                            magtext = ifile.read().splitlines()
+
+                        with open(magfile, 'w') as ofile:
+                            for line in magtext:
+                                tmatch = portrex.match(line)
+                                if tmatch:
+                                    if portnum >= 0:
+                                        line = 'port ' + str(portnum) + ' ' + tmatch.group(2)
+                                    else:
+                                        line = 'port ' + tmatch.group(1) + ' ' + tmatch.group(2)
+                                ematch = endrex.match(line)
+                                print(line, file=ofile)
+                                lmatch = flabrex.match(line)
+                                if not lmatch:
+                                    lmatch = rlabrex.match(line)
+                                if lmatch:
+                                    labname = lmatch.group(1).lower()
+                                    try:
+                                        portnum = port_dict[labname]
+                                    except:
+                                        portnum = -1
+                    elif os.path.splitext(magfile)[1] == '.mag':
+                        # NOTE:  Probably this means the GDS cell has a different name.
+                        print('Error: No file ' + magfile + '.  Why is it in maglef???')
+
+                # Remove the startup script and generation script
+                os.remove(destlibdir + '/.magicrc')
+                os.remove(destlibdir + '/generate_magic.tcl')
+            else:
+                print("Master PDK magic startup file not found.  Did you install")
+                print("PDK tech files before PDK vendor files?")
+
+    # If SPICE or CDL databases were specified, then convert them to
+    # a form that can be used by ngspice, using the cdl2spi.py script 
+
+    if have_spice:
+        if not os.path.isdir(targetdir + '/libs.ref/spi'):
+            os.makedirs(targetdir + '/libs.ref/spi', exist_ok=True)
+
+    elif have_cdl:
+        if not os.path.isdir(targetdir + '/libs.ref/spi'):
+            os.makedirs(targetdir + '/libs.ref/spi', exist_ok=True)
+
+        print("Migrating CDL netlists to SPICE.")
+        destdir = targetdir + '/libs.ref/spi'
+        srcdir = targetdir + '/libs.ref/cdl'
+        os.makedirs(destdir, exist_ok=True)
+
+        # For each library, create the library subdirectory
+        for library in libraries:
+            if len(library) == 3:
+                destlib = library[2]
+            else:
+                destlib = library[1]
+            destlibdir = destdir + '/' + destlib
+            srclibdir = srcdir + '/' + destlib
+            os.makedirs(destlibdir, exist_ok=True)
+
+            # Find CDL file names in the source
+            cdlfiles = os.listdir(srclibdir)
+
+            # The directory with scripts should be in ../common with respect
+            # to the Makefile that determines the cwd.
+            scriptdir = os.path.split(os.getcwd())[0] + '/common/'
+
+            # Run cdl2spi.py script to read in the CDL file and write out SPICE
+            for cdlfile in cdlfiles:
+                spiname = os.path.splitext(cdlfile)[0] + '.spi'
+                procopts = [scriptdir + 'cdl2spi.py', srclibdir + '/' + cdlfile, destlibdir + '/' + spiname]
+                if do_cdl_scaleu:
+                    procopts.append('-dscale=u')
+                for item in ignorelist:
+                    procopts.append('-ignore=' + item)
+                print('Running (in ' + destlibdir + '): ' + ' '.join(procopts))
+                subprocess.run(procopts,
+			stdin = subprocess.DEVNULL, stdout = subprocess.PIPE,
+			stderr = subprocess.PIPE, cwd = destlibdir,
+			universal_newlines = True)
+
+    sys.exit(0)
diff --git a/common/padframe_generator.py b/common/padframe_generator.py
new file mode 120000
index 0000000..c87a0c5
--- /dev/null
+++ b/common/padframe_generator.py
@@ -0,0 +1 @@
+soc_floorplanner.py
\ No newline at end of file
diff --git a/common/pdk.bindkeys b/common/pdk.bindkeys
new file mode 100644
index 0000000..1b502db
--- /dev/null
+++ b/common/pdk.bindkeys
@@ -0,0 +1,186 @@
+#
+# Cadence-compatibility bindings except where marked.
+#
+macro f  "view"	     ;# zoom to fit window
+macro ^z "zoom 0.5"  ;# zoom in
+macro Z  "zoom 2"    ;# zoom out
+macro B  "popstack"  ;# up hierarchy
+macro X  {pushstack [cellname list self]}	;# down hierarchy
+macro x  "edit"		;# down hierarchy, edit-in-place
+macro b  "select top cell ; edit"  ;# up hierarchy from edit-in-place
+macro p  "tool wire; magic::trackwire %W pick"	;# path
+macro ^r "redraw"
+macro ^f "unexpand"
+macro F  "expand"
+macro ^a "select area"
+macro ^d "select clear"
+macro k  "magic::measure"
+macro K  "magic::unmeasure"
+macro i  "magic::promptload getcell"
+macro l  "magic::update_texthelper ; wm deiconify .texthelper ; raise .texthelper"
+macro O  "magic::clock"
+macro <del> "magic::delete"
+
+# Toolkit parameter dialog
+macro q "magic::gencell {} ; raise .params"
+#
+# The following should be already implemented as existing Magic bindings
+#
+macro u "undo"
+macro U "redo"
+macro m "move"
+macro c "copy"
+#
+# Compatibility with Electric;  Cadence bindings are on function keys and
+# do not work through the VNC.
+macro ^s "magic::promptsave magic"	;# save dialog menu
+
+#
+# Bertrand's bindings follow except where marked.
+#
+macro < sideways
+macro ^ upsidedown
+#
+# Set grid at 1 micron
+#
+macro 0  "grid on ; grid 1l"	;# Grid at 0.5um (1 lambda)
+# macro ^f "feedback clear"	;# conflicts with Cadence binding
+#
+# Paint/Erase macros 
+#
+macro 1 "paint m1"
+macro ! "erase m1"
+macro 2 "paint m2"
+macro @ "erase m2"
+macro 3 "paint m3"
+macro # "erase m3"
+#ifdef METAL4
+macro 4 "paint mtp"
+macro $ "erase mtp"
+#endif
+#ifdef METAL5
+macro 4 "paint m4"
+macro $ "erase m4"
+macro 5 "paint mtp"
+macro % "erase mtp"
+#endif
+#ifdef METAL6
+macro 4 "paint m4"
+macro $ "erase m4"
+macro 5 "paint m5"
+macro % "erase m5"
+macro 6 "paint mtp"
+macro ^ "erase mtp"
+#endif
+
+macro 7 "paint poly"
+# macro & "erase poly"
+# macro p "paint pdiff"
+macro n "paint ndiff"
+# macro l "erase labels"
+macro P "erase pdiff"
+macro N "erase ndiff"
+macro y "drc check; drc why"
+macro ? "select area; what"
+
+macro / "expand toggle"
+macro ^w "writeall force"
+macro ^e "edit"
+# macro ^x "quit"
+
+macro z "findbox zoom"
+# "f" conflicts with Cadence "full view", so use control-i to select cells.
+# macro f "select cell"
+macro ^i "select cell"
+
+# Leave keypad bindings as-is, further down.  However, keypad
+# keys generally don't translate through the VNC session, so
+# use the following arrow key bindings:
+#
+#                         no shift  shift
+# arrows only -> Pan       10%      100%
+# with alt    -> Move      1 lambda 1 grid
+# with ctrl   -> Stretch   1 lambda 1 grid
+# 
+# Pan 10 percent of the window size with arrows
+# macro XK_Left  "scroll l .1 w"
+# macro XK_Up    "scroll u .1 w"
+# macro XK_Right "scroll r .1 w"
+# macro XK_Down  "scroll d .1 w"
+
+# Pan 100 percent of the window size with arrows
+# macro Shift_XK_Left  "scroll l 1 w"
+# macro Shift_XK_Up    "scroll u 1 w"
+# macro Shift_XK_Right "scroll r 1 w"
+# macro Shift_XK_Down  "scroll d 1 w"
+
+# move 0.05um with arrows
+# macro Alt_XK_Left          "move l 1l"
+# macro Alt_XK_Right         "move r 1l"
+# macro Alt_XK_Up            "move u 1l"
+# macro Alt_XK_Down          "move d 1l"
+
+# move 1 grid unit with arrows
+# macro Alt_Shift_XK_Left  "move l 1g"
+# macro Alt_Shift_XK_Right "move r 1g"
+# macro Alt_Shift_XK_Up    "move u 1g"
+# macro Alt_Shift_XK_Down  "move d 1g"
+
+# stretch 0.05um with arrows
+# macro Control_XK_Left          "stretch l 1l"
+# macro Control_XK_Right         "stretch r 1l"
+# macro Control_XK_Up            "stretch u 1l"
+# macro Control_XK_Down          "stretch d 1l"
+
+# stretch 1 grid unit with arrows
+# macro Control_Shift_XK_Left  "stretch l 1g"
+# macro Control_Shift_XK_Right "stretch r 1g"
+# macro Control_Shift_XK_Up    "stretch u 1g"
+# macro Control_Shift_XK_Down  "stretch d 1g"
+
+# shift mouse wheel bindings for right-left shift
+macro Shift_XK_Pointer_Button4 "scroll r .05 w"
+macro Shift_XK_Pointer_Button5 "scroll l .05 w"
+
+# control mouse wheel bindings for zoom in/out
+macro Control_XK_Pointer_Button4 "zoom 0.70711"
+macro Control_XK_Pointer_Button5 "zoom 1.41421"
+
+# Bertrand's original arrow macros
+# move 1 grid unit with arrows
+macro XK_Left          "move l 1g"
+macro XK_Right         "move r 1g"
+macro XK_Up            "move u 1g"
+macro XK_Down          "move d 1g"
+
+# move 0.05um with arrows
+macro Control_XK_Left  "move l 1l"
+macro Control_XK_Right "move r 1l"
+macro Control_XK_Up    "move u 1l"
+macro Control_XK_Down  "move d 1l"
+
+# stretch 1 grid unit with arrows
+macro Shift_XK_Left          "stretch l 1g"
+macro Shift_XK_Right         "stretch r 1g"
+macro Shift_XK_Up            "stretch u 1g"
+macro Shift_XK_Down          "stretch d 1g"
+
+# stretch 0.05um with arrows
+macro Control_Shift_XK_Left  "stretch l 1l"
+macro Control_Shift_XK_Right "stretch r 1l"
+macro Control_Shift_XK_Up    "stretch u 1l"
+macro Control_Shift_XK_Down  "stretch d 1l"
+
+# Restore pan function on Alt-key
+# Pan 10 percent of the window size with arrows
+macro Alt_XK_Left  "scroll l .1 w"
+macro Alt_XK_Up    "scroll u .1 w"
+macro Alt_XK_Right "scroll r .1 w"
+macro Alt_XK_Down  "scroll d .1 w"
+
+# Pan 100 percent of the window size with arrows
+macro Alt_Shift_XK_Left  "scroll l 1 w"
+macro Alt_Shift_XK_Up    "scroll u 1 w"
+macro Alt_Shift_XK_Right "scroll r 1 w"
+macro Alt_Shift_XK_Down  "scroll d 1 w"
+
diff --git a/common/pdk.prm b/common/pdk.prm
new file mode 100644
index 0000000..719eb74
--- /dev/null
+++ b/common/pdk.prm
@@ -0,0 +1,26 @@
+; TODO: make changes to this file for TECHNAME?
+; configuration file for TECHNAME (left same as osu035, 0.35um process)
+; Note that these values are totally bogus!
+;
+
+lambda  0.01    ; length scaling, microns (1 lambda = 1 centimicron)
+
+capga   .0115 ; gate capacitance, pF/micron^2
+
+capda 0.0012
+capdp 0.0013
+cappda 0.00260
+cappdp 0.00090
+
+lowthresh  0.5  ; logic low threshold as a normalized voltage
+highthresh 0.5  ; logic high threshold as a normalized voltage
+
+cntpullup 0     ; irrelevant, cmos technology; no depletion transistors
+diffperim 0     ; don't include diffusion perimeters for sidewall cap.
+subparea 0      ; poly over transistor won't count as part pf bulk-poly cap.
+diffext  0      ; diffusion extension for each transistor
+
+resistance n-channel dynamic-low    2     0.4   1844.70
+resistance p-channel dynamic-high   6.2   0.4   1489.10
+resistance n-channel static         2     0.4   2203.94
+resistance p-channel static         6.2   0.4   1693.37
diff --git a/common/pdk.tcl b/common/pdk.tcl
new file mode 100644
index 0000000..04f32a6
--- /dev/null
+++ b/common/pdk.tcl
@@ -0,0 +1,274 @@
+#-------------------------------------------------------------------
+# General-purpose routines for the PDK script in all technologies
+#-------------------------------------------------------------------
+# 
+#----------------------------------------
+# Number Conversion Functions
+#----------------------------------------
+
+#---------------------
+# Microns to Lambda
+#---------------------
+proc magic::u2l {micron} {
+    set techlambda [magic::tech lambda]
+    set tech1 [lindex $techlambda 1]
+    set tech0 [lindex $techlambda 0]
+    set tscale [expr {$tech1 / $tech0}]
+    set lambdaout [expr {((int([magic::cif scale output] * 10000)) / 10000.0)}]
+    return [expr $micron / ($lambdaout*$tscale) ]
+}
+
+#---------------------
+# Lambda to Microns
+#---------------------
+proc magic::l2u {lambda} {
+    set techlambda [magic::tech lambda]
+    set tech1 [lindex $techlambda 1] ; set tech0 [lindex $techlambda 0]
+    set tscale [expr {$tech1 / $tech0}]
+    set lambdaout [expr {((int([magic::cif scale output] * 10000)) / 10000.0)}]
+    return [expr $lambda * $lambdaout * $tscale ]
+}
+
+#---------------------
+# Internal to Microns
+#---------------------
+proc magic::i2u { value } {
+    return [expr {((int([magic::cif scale output] * 10000)) / 10000.0) * $value}]
+}
+
+#---------------------
+# Microns to Internal
+#---------------------
+proc magic::u2i {value} {
+    return [expr {$value / ((int([magic::cif scale output] * 10000)) / 10000.0)}]
+}
+
+#---------------------
+# Float to Spice 
+#---------------------
+proc magic::float2spice {value} { 
+    if {$value >= 1.0e+6} { 
+	set exponent 1e+6
+	set unit "meg"
+    } elseif {$value >= 1.0e+3} { 
+	set exponent 1e+3
+	set unit "k"
+    } elseif { $value >= 1} { 
+	set exponent 1
+	set unit ""
+    } elseif {$value >= 1.0e-3} { 
+	set exponent 1e-3
+	set unit "m"
+    } elseif {$value >= 1.0e-6} { 
+	set exponent 1e-6
+	set unit "u"
+    } elseif {$value >= 1.0e-9} { 
+	set exponent 1e-9
+	set unit "n"
+    } elseif {$value >= 1.0e-12} { 
+	set exponent 1e-12
+	set unit "p"
+    } elseif {$value >= 1.0e-15} { 
+	set exponent 1e-15
+	set unit "f"
+    } else {
+	set exponent 1e-18
+	set unit "a"
+    }
+    set val [expr $value / $exponent]
+    set val [expr int($val * 1000) / 1000.0]
+    if {$val == 0} {set unit ""}
+    return $val$unit
+}
+
+#---------------------
+# Spice to Float
+#---------------------
+proc magic::spice2float {value {faultval 0.0}} { 
+    # Remove trailing units, at least for some common combinations
+    set value [string tolower $value]
+    set value [string map {um u nm n uF n nF n pF p aF a} $value]
+    set value [string map {meg "* 1.0e6" k "* 1.0e3" m "* 1.0e-3" u "* 1.0e-6" \
+		 n "* 1.0 e-9" p "* 1.0e-12" f "* 1.0e-15" a "* 1.0e-15"} $value]
+    if {[catch {set rval [expr $value]}]} {
+	puts stderr "Value is not numeric!"
+	set rval $faultval
+    }
+    return $rval
+}
+
+#---------------------
+# Numeric Precision
+#---------------------
+proc magic::3digitpastdecimal {value} {
+    set new [expr int([expr $value * 1000 + 0.5 ]) / 1000.0]
+    return $new
+}
+
+#-------------------------------------------------------------------
+# File Access Functions
+#-------------------------------------------------------------------
+
+#-------------------------------------------------------------------
+# Ensures that a cell name does not already exist, either in
+# memory or on disk. Modifies the name until it does.
+#-------------------------------------------------------------------
+proc magic:cellnameunique {cellname} {
+    set i 0
+    set newname $cellname
+    while {[cellname list exists $newname] != 0 || [magic::searchcellondisk $newname] != 0} {
+	incr i
+	set newname ${cellname}_$i
+    }
+    return $newname
+}
+
+#-------------------------------------------------------------------
+# Looks to see if a cell exists on disk
+#-------------------------------------------------------------------
+proc magic::searchcellondisk {name} {
+    set rlist {}
+    foreach dir [path search] {
+	set ftry [file join $dir ${name}.mag]
+	if [file exists $ftry] {
+	    return 1
+	}
+    }
+    return 0
+} 
+
+#-------------------------------------------------------------------
+# Checks to see if a cell already exists on disk or in memory
+#-------------------------------------------------------------------
+proc magic::iscellnameunique {cellname} {
+    if {[cellname list exists $cellname] == 0 && [magic::searchcellondisk $cellname] == 0} { 
+	return 1
+    } else {
+	return 0
+    }
+}
+
+#--------------------------------------------------------------
+# Procedure that checks the user's "ip" subdirectory on startup
+# and adds each one's maglef subdirectory to the path.
+#--------------------------------------------------------------
+
+proc magic::query_mylib_ip {} {
+    global TECHPATH
+    global env
+    if [catch {set home $env(SUDO_USER)}] {
+        set home $env(USER)
+    }
+    set homedir /home/${home}
+    set ip_dirs [glob -directory ${homedir}/design/ip *]
+    set proj_dir [pwd]
+    set config_dir .config
+    set info_dir ${proj_dir}/${config_dir}
+    if {![file exists ${info_dir}]} {
+	set config_dir .ef-config
+	set info_dir ${proj_dir}/${config_dir}
+    }
+
+    set info_file ${info_dir}/info
+    set depends [dict create]
+    if {![catch {open $info_file r} ifd]} {
+        set depsec false
+        while {[gets $ifd line] >= 0} {
+	    if {[string first dependencies: $line] >= 0} {
+	        set depsec true
+	    }
+	    if {$depsec} {
+		if {[string first version: $line] >= 0} {
+		    if {$ipname != ""} {
+			set ipvers [string trim [lindex [split $line] 1] ']
+			dict set depends $ipname $ipvers
+			set ipname ""
+		    } else {
+			puts stderr "Badly formatted info file in ${config_dir}!"
+		    }
+		} else {
+		    set ipname [string trim $line :]
+		}
+	    }
+	}
+    }
+
+    foreach dir $ip_dirs {
+	# Version handling:  version dependencies are found in
+	# ${config_dir}/info.  For all other IP, use the most recent
+	# version number.
+	set ipname [lindex [file split $dir] end]
+	if {![catch {set version [dict get $depends $ipname]}]} {
+	    if {[file isdirectory ${dir}/${version}/maglef]} {
+		addpath ${dir}/${version}/maglef
+		continue
+	    } else {
+		puts stderr "ERROR:  Dependency ${ipname} version ${version} does not exist"
+	    }
+	}
+
+	# Secondary directory is the version number.  Use the highest
+	# version available.
+
+	set sub_dirs {}
+        catch {set sub_dirs [glob -directory $dir *]}
+	set maxver 0.0
+	foreach subdir $sub_dirs {
+	    set vidx [string last / $subdir]
+	    incr vidx
+	    set version [string range $subdir $vidx end]
+	    if {$version > $maxver} {
+		set maxver $version
+	    }
+	}
+	if {[file exists ${dir}/${maxver}/maglef]} {
+	    # Compatibility rule:  foundry name must match.
+	    # Get foundry name from ${config_dir}/techdir symbolic link reference
+	    if {[file exists ${dir}/${maxver}/${config_dir}/techdir]} {
+		set technodedir [file link ${dir}/${maxver}/${config_dir}/techdir]
+		set nidx [string last / $technodedir]
+		set techdir [string range $technodedir 0 $nidx-1]
+		if {$techdir == $TECHPATH} {
+		    addpath ${dir}/${maxver}/maglef
+		}
+	    }
+	}
+    }
+}
+
+#--------------------------------------------------------------
+# Procedure that checks the user's design directory on startup
+# and adds each one's mag subdirectory to the path.
+#--------------------------------------------------------------
+
+proc magic::query_my_projects {} {
+    global TECHPATH
+    global env
+    if [catch {set home $env(SUDO_USER)}] {
+        set home $env(USER)
+    }
+    set homedir /home/${home}
+    set proj_dirs [glob -directory ${homedir}/design *]
+    foreach dir $proj_dirs {
+	# Compatibility rule:  foundry name must match.
+	# Get foundry name from ${config_dir}/techdir symbolic link reference
+	if {[file exists ${dir}/mag]} {
+	    set config_dir .config
+	    set tech_dir ${dir}/${config_dir}
+	    if {![file exists ${tech_dir}]} {
+		set config_dir .ef-config
+		set tech_dir ${dir}/${config_dir}
+	    }
+	    if {[file exists ${dir}/${config_dir}/techdir]} {
+		set technodedir [file link ${dir}/${config_dir}/techdir]
+		set nidx [string last / $technodedir]
+		set techdir [string range $technodedir 0 $nidx-1]
+		if {$techdir == $TECHPATH} {
+		    addpath ${dir}/mag
+		}
+	    }
+	}
+    }
+}
+
+#----------------------------------------------------------------
diff --git a/common/preproc.py b/common/preproc.py
new file mode 100755
index 0000000..1fca5be
--- /dev/null
+++ b/common/preproc.py
@@ -0,0 +1,576 @@
+#!/usr/bin/env python3
+#--------------------------------------------------------------------
+#
+# preproc.py
+#
+# General purpose macro preprocessor
+#
+#--------------------------------------------------------------------
+# Usage:
+#
+#	preproc.py input_file [output_file] [-D<variable> ...]
+#
+# Where <variable> may be a keyword or a key=value pair
+#
+# Syntax:  Basically like cpp.  However, this preprocessor handles
+# only a limited set of keywords, so it does not otherwise mangle
+# the file in the belief that it must be C code.  Handling of boolean
+# relations is important, so these are thoroughly defined (see below)
+#
+#	#if defined(<variable>) [...]
+#	#ifdef <variable>
+#	#ifndef <variable>
+#	#elseif <variable>
+#	#else
+#	#endif
+#
+#	#define <variable> [...]
+#	#define <variable>(<parameters>) [...]
+#	#undef <variable>
+#
+#	#include <filename>
+#
+# <variable> may be
+#	<keyword>
+#	<keyword>=<value>
+#
+#	<keyword> without '=' is effectively the same as <keyword>=1
+#	Lack of a keyword is equivalent to <keyword>=0, in a conditional.
+#
+# Boolean operators (in order of precedence):
+#	!	NOT
+#	&&	AND
+#	||	OR	
+#
+# Comments:
+#       Most comments (C-like or Tcl-like) are output as-is.  A
+#	line beginning with "###" is treated as a preprocessor
+#	comment and is not copied to the output.
+#
+# Examples;
+#	#if defined(X) || defined(Y)
+#	#else
+#	#if defined(Z)
+#	#endif
+#--------------------------------------------------------------------
+
+import re
+import sys
+
+def solve_statement(condition):
+
+    defrex = re.compile('defined[ \t]*\(([^\)]+)\)')
+    orrex = re.compile('(.+)\|\|(.+)')
+    andrex = re.compile('(.+)&&(.+)')
+    notrex = re.compile('!([^&\|]+)')
+    parenrex = re.compile('\(([^\)]+)\)')
+    leadspacerex = re.compile('^[ \t]+(.*)')
+    endspacerex = re.compile('(.*)[ \t]+$')
+
+    matchfound = True
+    while matchfound:
+        matchfound = False
+
+        # Search for defined(K) (K must be a single keyword)
+        # If the keyword was defined, then it should have been replaced by 1
+        lmatch = defrex.search(condition)
+        if lmatch:
+            key = lmatch.group(1)
+            if key == 1 or key == '1' or key == True:
+                repl = 1
+            else:
+                repl = 0
+
+            condition = defrex.sub(str(repl), condition)
+            matchfound = True
+
+        # Search for (X) recursively
+        lmatch = parenrex.search(condition)
+        if lmatch:
+            repl = solve_statement(lmatch.group(1))
+            condition = parenrex.sub(str(repl), condition)
+            matchfound = True
+
+        # Search for !X recursively
+        lmatch = notrex.search(condition)
+        if lmatch:
+            only = solve_statement(lmatch.group(1))
+            if only == '1':
+                repl = '0'
+            else:
+                repl = '1'
+            condition = notrex.sub(str(repl), condition)
+            matchfound = True
+
+        # Search for A&&B recursively
+        lmatch = andrex.search(condition)
+        if lmatch:
+            first = solve_statement(lmatch.group(1))
+            second = solve_statement(lmatch.group(2))
+            if first == '1' and second == '1':
+                repl = '1'
+            else:
+                repl = '0'
+            condition = andrex.sub(str(repl), condition)
+            matchfound = True
+
+        # Search for A||B recursively
+        lmatch = orrex.search(condition)
+        if lmatch:
+            first = solve_statement(lmatch.group(1))
+            second = solve_statement(lmatch.group(2))
+            if first == '1' or second == '1':
+                repl = '1'
+            else:
+                repl = '0'
+            condition = orrex.sub(str(repl), condition)
+            matchfound = True
+ 
+    # Remove whitespace
+    lmatch = leadspacerex.match(condition)
+    if lmatch:
+        condition = lmatch.group(1)
+    lmatch = endspacerex.match(condition)
+    if lmatch:
+        condition = lmatch.group(1)
+    
+    return condition
+
+def solve_condition(condition, keys, defines, keyrex):
+    # Do definition replacement on the conditional
+    for keyword in keys:
+        condition = keyrex[keyword].sub(defines[keyword], condition)
+
+    value = solve_statement(condition)
+    if value == '1':
+        return 1
+    else:
+        return 0
+
+def sortkeys(keys):
+    newkeys = []
+    for i in range(0, len(keys)):
+        keyword = keys[i]
+        found = False
+        for j in range(0, len(newkeys)):
+            inword = newkeys[j]
+            if inword in keyword:
+                # Insert keyword before inword
+                newkeys.insert(j, keyword)
+                found = True
+                break
+        if not found:
+            newkeys.append(keyword)
+    return newkeys
+
+def runpp(keys, keyrex, defines, ccomm, incdirs, inputfile, ofile):
+
+    includerex = re.compile('^[ \t]*#include[ \t]+"*([^ \t\n\r"]+)')
+    definerex = re.compile('^[ \t]*#define[ \t]+([^ \t]+)[ \t]+(.+)')
+    paramrex = re.compile('^([^\(]+)\(([^\)]+)\)')
+    defrex = re.compile('^[ \t]*#define[ \t]+([^ \t\n\r]+)')
+    undefrex = re.compile('^[ \t]*#undef[ \t]+([^ \t\n\r]+)')
+    ifdefrex = re.compile('^[ \t]*#ifdef[ \t]+(.+)')
+    ifndefrex = re.compile('^[ \t]*#ifndef[ \t]+(.+)')
+    ifrex = re.compile('^[ \t]*#if[ \t]+(.+)')
+    elseifrex = re.compile('^[ \t]*#elseif[ \t]+(.+)')
+    elserex = re.compile('^[ \t]*#else')
+    endifrex = re.compile('^[ \t]*#endif')
+    commentrex = re.compile('^###[^#]*$')
+    ccstartrex = re.compile('/\*')		# C-style comment start
+    ccendrex = re.compile('\*/')		# C-style comment end
+    contrex = re.compile('.*\\\\$')		# Backslash continuation line
+
+    badifrex = re.compile('^[ \t]*#if[ \t]*.*')
+    badelserex = re.compile('^[ \t]*#else[ \t]*.*')
+
+    # This code is not designed to operate on huge files.  Neither is it designed to be
+    # efficient.
+
+    # ifblock state:
+    # -1 : not in an if/else block
+    #  0 : no condition satisfied yet
+    #  1 : condition satisfied
+    #  2 : condition was handled, waiting for endif
+
+    ifile = False
+    try:
+        ifile = open(inputfile, 'r')
+    except FileNotFoundError:
+        for dir in incdirs:
+            try:
+                ifile = open(dir + '/' + inputfile, 'r')
+            except FileNotFoundError:
+                pass
+            else:
+                break
+
+    if not ifile:
+        print("Error:  Cannot open file " + inputfile + " for reading.\n", file=sys.stderr)
+        return
+
+    ccblock = -1
+    ifblock = -1
+    ifstack = []
+    lineno = 0
+
+    filetext = ifile.readlines()
+    lastline = []
+
+    for line in filetext:
+        lineno += 1
+
+        # C-style comments override everything else
+        if ccomm:
+            if ccblock == -1:
+                pmatch = ccstartrex.search(line)
+                if pmatch:
+                    ematch = ccendrex.search(line[pmatch.end(0):])
+                    if ematch:
+                        line = line[0:pmatch.start(0)] + line[pmatch.end(0) + ematch.end(0):]
+                    else:
+                        line = line[0:pmatch.start(0)]
+                        ccblock = 1
+            elif ccblock == 1:
+                ematch = ccendrex.search(line)
+                if ematch:
+                    line = line[ematch.end(0)+2:]
+                    ccblock = -1
+                else:
+                    continue
+
+        # Handle continuation detected in previous line
+        if lastline:
+            # Note:  Apparently there is a character retained after the backslash,
+            # so strip the last two characters from the line.
+            line = lastline[0:-2] + line
+            lastline = []
+
+        # Continuation lines have the next highest priority.  However, this
+        # script will attempt to keep continuation lines in the body of the
+        # text and only collapse lines where continuation lines occur in
+        # a preprocessor statement.
+
+        cmatch = contrex.match(line)
+
+        # Ignore lines beginning with "###"
+        pmatch = commentrex.match(line)
+        if pmatch:
+            continue
+
+        # Handle ifdef
+        pmatch = ifdefrex.match(line)
+        if pmatch:
+            if cmatch:
+                lastline = line
+                continue
+            if ifblock != -1:
+                ifstack.append(ifblock)
+                
+            if ifblock == 1 or ifblock == -1:
+                condition = pmatch.group(1)
+                ifblock = solve_condition(condition, keys, defines, keyrex)
+            else:
+                ifblock = 2
+            continue
+
+        # Handle ifndef
+        pmatch = ifndefrex.match(line)
+        if pmatch:
+            if cmatch:
+                lastline = line
+                continue
+            if ifblock != -1:
+                ifstack.append(ifblock)
+                
+            if ifblock == 1 or ifblock == -1:
+                condition = pmatch.group(1)
+                ifblock = solve_condition(condition, keys, defines, keyrex)
+                ifblock = 1 if ifblock == 0 else 0
+            else:
+                ifblock = 2
+            continue
+
+        # Handle if
+        pmatch = ifrex.match(line)
+        if pmatch:
+            if cmatch:
+                lastline = line
+                continue
+            if ifblock != -1:
+                ifstack.append(ifblock)
+
+            if ifblock == 1 or ifblock == -1:
+                condition = pmatch.group(1)
+                ifblock = solve_condition(condition, keys, defines, keyrex)
+            else:
+                ifblock = 2
+            continue
+
+        # Handle elseif
+        pmatch = elseifrex.match(line)
+        if pmatch:
+            if cmatch:
+                lastline = line
+                continue
+            if ifblock == -1:
+               print("Error: #elseif without preceding #if at line " + str(lineno) + ".", file=sys.stderr)
+               ifblock = 0
+
+            if ifblock == 1:
+                ifblock = 2
+            elif ifblock != 2:
+                condition = pmatch.group(1)
+                ifblock = solve_condition(condition, keys, defines, keyrex)
+            continue
+
+        # Handle else
+        pmatch = elserex.match(line)
+        if pmatch:
+            if cmatch:
+                lastline = line
+                continue
+            if ifblock == -1:
+               print("Error: #else without preceding #if at line " + str(lineno) + ".", file=sys.stderr)
+               ifblock = 0
+
+            if ifblock == 1:
+                ifblock = 2
+            elif ifblock == 0:
+                ifblock = 1
+            continue
+
+        # Handle endif
+        pmatch = endifrex.match(line)
+        if pmatch:
+            if cmatch:
+                lastline = line
+                continue
+            if ifblock == -1:
+                print("Error:  #endif outside of #if block at line " + str(lineno) + " (ignored)", file=sys.stderr)
+            elif ifstack:
+                ifblock = ifstack.pop()
+            else:
+                ifblock = -1
+            continue
+                 
+        # Check for 'if' or 'else' that were not properly formed
+        pmatch = badifrex.match(line)
+        if pmatch:
+            print("Error:  Badly formed #if statement at line " + str(lineno) + " (ignored)", file=sys.stderr)
+            if ifblock != -1:
+                ifstack.append(ifblock)
+
+            if ifblock == 1 or ifblock == -1:
+                ifblock = 0
+            else:
+                ifblock = 2
+            continue
+
+        pmatch = badelserex.match(line)
+        if pmatch:
+            print("Error:  Badly formed #else statement at line " + str(lineno) + " (ignored)", file=sys.stderr)
+            ifblock = 2
+            continue
+
+        # Ignore all lines that are not satisfied by a conditional
+        if ifblock == 0 or ifblock == 2:
+            continue
+
+        # Handle include.  Note that this code does not expect or
+        # handle 'if' blocks that cross file boundaries.
+        pmatch = includerex.match(line)
+        if pmatch:
+            if cmatch:
+                lastline = line
+                continue
+            inclfile = pmatch.group(1)
+            runpp(keys, keyrex, defines, ccomm, incdirs, inclfile, ofile)
+            continue
+
+        # Handle define (with value)
+        pmatch = definerex.match(line)
+        if pmatch:
+            if cmatch:
+                lastline = line
+                continue
+            condition = pmatch.group(1)
+
+            # Additional handling of definition w/parameters: #define X(a,b,c) ..."
+            rmatch = paramrex.match(condition) 
+            if rmatch:
+                # 'condition' as a key into keyrex only needs to be unique.
+                # Use the definition word without everything in parentheses
+                condition = rmatch.group(1)
+
+                # 'pcondition' is the actual search regexp and must capture all
+                # the parameters individually for substitution
+
+                parameters = rmatch.group(2).split(',')
+
+                # Generate the regexp string to match comma-separate values
+                # Note that this is based on the cpp preprocessor, which
+                # apparently allows commas in arguments if surrounded by
+                # parentheses;  e.g., "def(a, b, (c1,c2))".  This is NOT
+                # handled.
+
+                pcondition = condition + '\('
+                for param in parameters[0:-1]:
+                    pcondition += '(.*),'
+                pcondition += '(.*)\)'
+
+                # Generate the substitution string with group substitutions
+                pvalue = pmatch.group(2)
+                idx = 1
+                for param in parameters:
+                    pvalue = pvalue.replace(param, '\g<' + str(idx) + '>')
+                    idx = idx + 1
+
+                defines[condition] = pvalue
+                keyrex[condition] = re.compile(pcondition)
+            else:
+                parameters = []
+                value = pmatch.group(2)
+                # Note:  Need to check for infinite recursion here, but it's tricky.
+                defines[condition] = value
+                keyrex[condition] = re.compile(condition)
+
+            if condition not in keys:
+                # Parameterized keys go to the front of the list
+                if parameters:
+                    keys.insert(0, condition)
+                else:
+                    keys.append(condition)
+                keys = sortkeys(keys)
+            continue
+
+        # Handle define (simple case, no value)
+        pmatch = defrex.match(line)
+        if pmatch:
+            if cmatch:
+                lastline = line
+                continue
+            condition = pmatch.group(1)
+            defines[condition] = '1'
+            keyrex[condition] = re.compile(condition)
+            if condition not in keys:
+                keys.append(condition)
+                keys = sortkeys(keys)
+            continue
+
+        # Handle undef
+        pmatch = undefrex.match(line)
+        if pmatch:
+            if cmatch:
+                lastline = line
+                continue
+            condition = pmatch.group(1)
+            if condition in keys:
+                defines.pop(condition)
+                keyrex.pop(condition)
+                keys.remove(condition)
+            continue
+
+        # Now do definition replacement on what's left (if anything)
+        # This must be done repeatedly from the top until there are no
+        # more substitutions to make.
+
+        while True:
+            origline = line
+            for keyword in keys:
+                newline = keyrex[keyword].sub(defines[keyword], line)
+                if newline != line:
+                    line = newline
+                    break
+                    
+            if line == origline:
+                break
+                
+        # Output the line
+        print(line, file=ofile, end='')
+
+    if ifblock != -1 or ifstack != []:
+        print("Error:  input file ended with an unterminated #if block.", file=sys.stderr)
+
+    if ifile != sys.stdin:
+        ifile.close()
+    return
+
+def printusage(progname):
+    print('Usage: ' + progname + ' input_file [output_file] [-options]')
+    print('   Options are:')
+    print('      -help         Print this help text.')
+    print('      -ccomm        Remove C comments in /* ... */ delimiters.')
+    print('      -D<def>       Define word <def> and set its value to 1.')
+    print('      -D<def>=<val> Define word <def> and set its value to <val>.')
+    print('      -I<dir>       Add <dir> to search path for input files.')
+    return
+
+if __name__ == '__main__':
+
+   # Parse command line for options and arguments
+    options = []
+    arguments = []
+    for item in sys.argv[1:]:
+        if item.find('-', 0) == 0:
+            options.append(item)
+        else:
+            arguments.append(item)
+
+    if len(arguments) > 0:
+        inputfile = arguments[0]
+        if len(arguments) > 1:
+            outputfile = arguments[1]
+        else:
+            outputfile = []
+    else:
+        printusage(sys.argv[0])
+        sys.exit(0)
+
+    defines = {}
+    keyrex = {}
+    keys = []
+    incdirs = []
+    ccomm = False
+    for item in options:
+        result = item.split('=')
+        if result[0] == '-help':
+            printusage(sys.argv[0])
+            sys.exit(0)
+        elif result[0] == '-ccomm':
+            ccomm = True
+        elif result[0][0:2] == '-I':
+            incdirs.append(result[0][2:])
+        elif result[0][0:2] == '-D':
+            keyword = result[0][2:]
+            try:
+                value = result[1]
+            except:
+                value = '1'
+            defines[keyword] = value
+            keyrex[keyword] = re.compile(keyword)
+            keys.append(keyword)
+            keys = sortkeys(keys)
+        else:
+            print('Bad option ' + item + ', options are -help, -ccomm, -D<def> -I<dir>\n')
+            sys.exit(1)
+
+    if outputfile:
+        ofile = open(outputfile, 'w')
+    else:
+        ofile = sys.stdout
+
+    if not ofile:
+        print("Error:  Cannot open file " + output_file + " for writing.")
+        sys.exit(1)
+
+    # Sort keys so that if any definition contains another definition, the
+    # subset word is handled last;  otherwise the subset word will get
+    # substituted, screwing up the definition names in which it occurs.
+
+    keys = sortkeys(keys)
+
+    runpp(keys, keyrex, defines, ccomm, incdirs, inputfile, ofile)
+    if ofile != sys.stdout:
+        ofile.close()
+    sys.exit(0)
diff --git a/common/remove_specify.py b/common/remove_specify.py
new file mode 100755
index 0000000..746a06f
--- /dev/null
+++ b/common/remove_specify.py
@@ -0,0 +1,94 @@
+#!/usr/bin/env python3
+#
+# Remove timing information from a verilog file, which is everything between
+# the keywords "specify" and "endspecify".
+#
+# Filter a verilog file to remove any backslash continuation lines, which
+# iverilog does not parse.  If targetroot is a directory, then find and
+# process all files in the path of targetroot.  If any file to be processed
+# is unmodified (has no backslash continuation lines), then ignore it.  If
+# any file is a symbolic link and gets modified, then remove the symbolic
+# link before overwriting with the modified file.
+#
+
+import stat
+import sys
+import os
+import re
+
+def makeuserwritable(filepath):
+    if os.path.exists(filepath):
+        st = os.stat(filepath)
+        os.chmod(filepath, st.st_mode | stat.S_IWUSR)
+
+def remove_specify(vfile, outfile):
+    modified = False
+    with open(vfile, 'r') as ifile:
+        vtext = ifile.read()
+
+    if outfile == None:
+        outfile = vfile
+
+    # Remove backslash-followed-by-newline and absorb initial whitespace.  It
+    # is unclear what initial whitespace means in this context, as the use-
+    # case that has been seen seems to work under the assumption that leading
+    # whitespace is ignored up to the amount used by the last indentation.
+
+    vlines = re.sub('\\\\\n[ \t]*', '', vtext)
+
+    specrex = re.compile('\n[ \t]*specify[ \t\n]+')
+    endspecrex = re.compile('\n[ \t]*endspecify')
+    smatch = specrex.search(vlines)
+    while smatch:
+        specstart = smatch.start()
+        specpos = smatch.end()
+        ematch = endspecrex.search(vlines[specpos:])
+        specend = ematch.end()
+        vtemp = vlines[0:specstart + 1] + vlines[specpos + specend + 1:]
+        vlines = vtemp
+        smatch = specrex.search(vlines)
+
+    if vlines != vtext:
+        # File contents have been modified, so if this file was a symbolic
+        # link, then remove it.  Otherwise, overwrite the file with the
+        # modified contents.
+        if outfile == vfile:
+            if os.path.islink(vfile):
+                os.unlink(vfile)
+        if os.path.exists(outfile):
+            makeuserwritable(outfile)
+        with open(outfile, 'w') as ofile:
+            ofile.write(vlines)
+
+    elif outfile != vfile:
+        if os.path.exists(outfile):
+            makeuserwritable(outfile)
+        with open(outfile, 'w') as ofile:
+            ofile.write(vlines)
+
+# If called as main, run remove_specify
+
+if __name__ == '__main__':
+
+    # Divide up command line into options and arguments
+    options = []
+    arguments = []
+    for item in sys.argv[1:]:
+        if item.find('-', 0) == 0:
+            options.append(item)
+        else:
+            arguments.append(item)
+
+    # Need one argument:  path to verilog netlist
+    # If two arguments, then 2nd argument is the output file.
+
+    if len(arguments) == 2:
+        netlist_path = arguments[0]
+        output_path = arguments[1]
+        remove_specify(netlist_path, output_path)
+    elif len(arguments) != 1:
+        print("Usage:  remove_spcify.py <file_path> [<output_path>]")
+    elif len(arguments) == 1:
+        netlist_path = arguments[0]
+        remove_specify(netlist_path, None)
+
diff --git a/common/soc_floorplanner.py b/common/soc_floorplanner.py
new file mode 100755
index 0000000..959a623
--- /dev/null
+++ b/common/soc_floorplanner.py
@@ -0,0 +1,2619 @@
+#!/usr/bin/env python3
+#
+#--------------------------------------------------------
+# Padframe Editor and Core Floorplanner
+#
+#--------------------------------------------------------
+# Written by Tim Edwards
+# efabless, inc.
+# April 24, 2019
+# Version 0.5
+# Based on https://github.com/YosysHQ/padring (requirement)
+# Update: May 9, 2019 to add console message window
+# Update: May 10, 2019 to incorporate core floorplanning
+# Update: Jan 31, 2020 to allow batch operation
+#--------------------------------------------------------
+
+import os
+import re
+import sys
+import glob
+import json
+import math
+import shutil
+import signal
+import select
+import subprocess
+import faulthandler
+
+import tkinter
+from tkinter import ttk
+from tkinter import filedialog
+import tksimpledialog
+from consoletext import ConsoleText
+
+# User preferences file (if it exists)
+prefsfile = '~/design/.profile/prefs.json'
+
+#------------------------------------------------------
+# Dialog for entering a pad
+#------------------------------------------------------
+
+class PadNameDialog(tksimpledialog.Dialog):
+    def body(self, master, warning=None, seed=None):
+        if warning:
+            ttk.Label(master, text=warning).grid(row = 0, columnspan = 2, sticky = 'wns')
+        ttk.Label(master, text="Enter new group name:").grid(row = 1, column = 0, sticky = 'wns')
+        self.nentry = ttk.Entry(master)
+        self.nentry.grid(row = 1, column = 1, sticky = 'ewns')
+        if seed:
+            self.nentry.insert(0, seed)
+        return self.nentry # initial focus
+
+    def apply(self):
+        return self.nentry.get()
+
+#------------------------------------------------------
+# Dialog for entering core dimensions
+#------------------------------------------------------
+
+class CoreSizeDialog(tksimpledialog.Dialog):
+    def body(self, master, warning="Chip core dimensions", seed=None):
+        if warning:
+            ttk.Label(master, text=warning).grid(row = 0, columnspan = 2, sticky = 'wns')
+        ttk.Label(master, text="Enter core width x height (microns):").grid(row = 1, column = 0, sticky = 'wns')
+        self.nentry = ttk.Entry(master)
+        self.nentry.grid(row = 1, column = 1, sticky = 'ewns')
+
+
+        if seed:
+            self.nentry.insert(0, seed)
+        return self.nentry # initial focus
+
+    def apply(self):
+        return self.nentry.get()
+
+#------------------------------------------------
+# SoC Floorplanner and Padframe Generator GUI
+#------------------------------------------------
+
+class SoCFloorplanner(ttk.Frame):
+    """Open Galaxy Pad Frame Generator."""
+
+    def __init__(self, parent = None, *args, **kwargs):
+        '''See the __init__ for Tkinter.Toplevel.'''
+        ttk.Frame.__init__(self, parent, *args[1:], **kwargs)
+        self.root = parent
+        self.init_data()
+        if args[0] == True:
+            self.do_gui = True
+            self.init_gui()
+        else:
+            self.do_gui = False
+            self.use_console = False
+
+    def on_quit(self):
+        """Exits program."""
+        quit()
+
+    def init_gui(self):
+        """Builds GUI."""
+        global prefsfile
+
+        message = []
+        fontsize = 11
+
+        # Read user preferences file, get default font size from it.
+        prefspath = os.path.expanduser(prefsfile)
+        if os.path.exists(prefspath):
+            with open(prefspath, 'r') as f:
+                self.prefs = json.load(f)
+            if 'fontsize' in self.prefs:
+                fontsize = self.prefs['fontsize']
+        else:
+            self.prefs = {}
+
+        s = ttk.Style()
+
+        available_themes = s.theme_names()
+        s.theme_use(available_themes[0])
+
+        s.configure('normal.TButton', font=('Helvetica', fontsize), border = 3, relief = 'raised')
+        s.configure('title.TLabel', font=('Helvetica', fontsize, 'bold italic'),
+                        foreground = 'brown', anchor = 'center')
+        s.configure('blue.TLabel', font=('Helvetica', fontsize), foreground = 'blue')
+        s.configure('normal.TLabel', font=('Helvetica', fontsize))
+        s.configure('normal.TCheckbutton', font=('Helvetica', fontsize))
+        s.configure('normal.TMenubutton', font=('Helvetica', fontsize))
+        s.configure('normal.TEntry', font=('Helvetica', fontsize), background='white')
+        s.configure('pad.TLabel', font=('Helvetica', fontsize), foreground = 'blue', relief = 'flat')
+        s.configure('select.TLabel', font=('Helvetica', fontsize, 'bold'), foreground = 'white',
+			background = 'blue', relief = 'flat')
+ 
+        # parent.withdraw()
+        self.root.title('Padframe Generator and Core Floorplanner')
+        self.root.option_add('*tearOff', 'FALSE')
+        self.pack(side = 'top', fill = 'both', expand = 'true')
+        self.root.protocol("WM_DELETE_WINDOW", self.on_quit)
+
+        pane = tkinter.PanedWindow(self, orient = 'vertical', sashrelief = 'groove',
+			sashwidth = 6)
+        pane.pack(side = 'top', fill = 'both', expand = 'true')
+
+        self.toppane = ttk.Frame(pane)
+        self.botpane = ttk.Frame(pane)
+
+        self.toppane.columnconfigure(0, weight = 1)
+        self.toppane.rowconfigure(0, weight = 1)
+        self.botpane.columnconfigure(0, weight = 1)
+        self.botpane.rowconfigure(0, weight = 1)
+
+        # Scrolled frame using canvas widget
+        self.pframe = tkinter.Frame(self.toppane)
+        self.pframe.grid(row = 0, column = 0, sticky = 'news')
+        self.pframe.rowconfigure(0, weight = 1)
+        self.pframe.columnconfigure(0, weight = 1)
+
+        # Add column on the left, listing all groups and the pads they belong to.
+        # This starts as just a frame to be filled.  Use a canvas to create a
+        # scrolled frame.
+
+        # The primary frame holds the canvas
+        self.canvas = tkinter.Canvas(self.pframe, background = "white")
+        self.canvas.grid(row = 0, column = 0, sticky = 'news')
+
+        # Add Y scrollbar to pad list window
+        xscrollbar = ttk.Scrollbar(self.pframe, orient = 'horizontal')
+        xscrollbar.grid(row = 1, column = 0, sticky = 'news')
+        yscrollbar = ttk.Scrollbar(self.pframe, orient = 'vertical')
+        yscrollbar.grid(row = 0, column = 1, sticky = 'news')
+
+        self.canvas.config(xscrollcommand = xscrollbar.set)
+        xscrollbar.config(command = self.canvas.xview)
+        self.canvas.config(yscrollcommand = yscrollbar.set)
+        yscrollbar.config(command = self.canvas.yview)
+
+        self.canvas.bind("<Button-4>", self.on_scrollwheel)
+        self.canvas.bind("<Button-5>", self.on_scrollwheel)
+
+        # Configure callback
+        self.canvas.bind("<Configure>", self.frame_configure)
+
+        # Add a text window to capture output.  Redirect print statements to it.
+        self.console = ttk.Frame(self.botpane)
+        self.console.grid(column = 0, row = 0, sticky = "news")
+        self.text_box = ConsoleText(self.console, wrap='word', height = 4)
+        self.text_box.pack(side='left', fill='both', expand='true')
+        console_scrollbar = ttk.Scrollbar(self.console)
+        console_scrollbar.pack(side='right', fill='y')
+        # Attach console to scrollbar
+        self.text_box.config(yscrollcommand = console_scrollbar.set)
+        console_scrollbar.config(command = self.text_box.yview)
+
+        # Add the bottom bar with buttons
+        self.bbar = ttk.Frame(self.botpane)
+        self.bbar.grid(column = 0, row = 1, sticky = "news")
+
+        self.bbar.import_button = ttk.Button(self.bbar, text='Import',
+		command=self.vlogimport, style='normal.TButton')
+        self.bbar.import_button.grid(column=0, row=0, padx = 5)
+
+        self.bbar.generate_button = ttk.Button(self.bbar, text='Generate',
+		command=self.generate, style='normal.TButton')
+        self.bbar.generate_button.grid(column=1, row=0, padx = 5)
+
+        self.bbar.save_button = ttk.Button(self.bbar, text='Save',
+		command=self.save, style='normal.TButton')
+        self.bbar.save_button.grid(column=2, row=0, padx = 5)
+
+        self.bbar.cancel_button = ttk.Button(self.bbar, text='Quit',
+		command=self.on_quit, style='normal.TButton')
+        self.bbar.cancel_button.grid(column=3, row=0, padx = 5)
+
+        pane.add(self.toppane)
+        pane.add(self.botpane)
+        pane.paneconfig(self.toppane, stretch='first')
+
+    def init_data(self):
+
+        self.vlogpads = []
+        self.corecells = []
+        self.Npads = []
+        self.Spads = []
+        self.Epads = []
+        self.Wpads = []
+        self.NEpad = []
+        self.NWpad = []
+        self.SEpad = []
+        self.SWpad = []
+        self.coregroup = []
+
+        self.celldefs = []
+        self.coredefs = []
+        self.selected = []
+        self.ioleflibs = []
+        self.llx = 0
+        self.lly = 0
+        self.urx = 0
+        self.ury = 0
+
+        self.event_data = {}
+        self.event_data['x0'] = 0
+        self.event_data['y0'] = 0
+        self.event_data['x'] = 0
+        self.event_data['y'] = 0
+        self.event_data['tag'] = None
+        self.scale = 1.0
+        self.margin = 10
+        self.pad_rotation = 0
+
+        self.init_messages = []
+        self.stdout = None
+        self.stderr = None
+
+        self.keep_cfg = False
+        self.ef_format = False
+        self.use_console = False
+
+    def init_padframe(self):
+        self.set_project()
+        self.vlogimport()
+        self.readplacement(precheck=True)
+        self.resolve()
+        self.generate(0)
+
+    # Local routines for handling printing to the text console
+
+    def print(self, message, file=None, end='\n', flush=True):
+        if not file:
+            if not self.use_console:
+                file = sys.stdout
+            else:
+                file = ConsoleText.StdoutRedirector(self.text_box)
+        if self.stdout:
+            print(message, file=file, end=end)
+            if flush:
+                self.stdout.flush()
+                self.update_idletasks()
+        else:
+            self.init_messages.append(message)
+
+    def text_to_console(self):
+        # Redirect stdout and stderr to the console as the last thing to do. . .
+        # Otherwise errors in the GUI get sucked into the void.
+
+        self.stdout = sys.stdout
+        self.stderr = sys.stderr
+        if self.use_console:
+            sys.stdout = ConsoleText.StdoutRedirector(self.text_box)
+            sys.stderr = ConsoleText.StderrRedirector(self.text_box)
+
+        if len(self.init_messages) > 0:
+            for message in self.init_messages:
+                self.print(message)
+            self.init_messages = []
+
+    # Set the project name(s).  This is the name of the top-level verilog.
+    # The standard protocol is that the project directory contains a file
+    # project.json that defines a name 'ip-name' that is the same as the
+    # layout name, the verilog module name, etc.  
+
+    def set_project(self):
+        # Check pwd
+        pwdname = self.projectpath if self.projectpath else os.getcwd()
+        
+        subdir = os.path.split(pwdname)[1]
+        if subdir == 'mag' or subdir == 'verilog':
+            projectpath = os.path.split(pwdname)[0]
+        else:
+            projectpath = pwdname
+
+        projectroot = os.path.split(projectpath)[0]
+        projectdirname = os.path.split(projectpath)[1]
+
+        # Check for efabless format.  This is probably more complicated than
+        # it deserves to be.  Option -ef_format is the best way to specify
+        # efabless format.  However, if it is not specified, then check the
+        # technology PDK directory and the project directory for the tell-tale
+        # ".ef-config" (efabless format) directory vs. ".config" (not efabless
+        # format).
+
+        if not self.ef_format:
+            if os.path.exists(projectpath + '/.ef-config'):
+                self.ef_format = True
+            elif self.techpath:
+                if os.path.exists(self.techpath + '/.ef-config'):
+                    self.ef_format = True
+        else:
+            # Do a quick consistency check.  Honor the -ef_format option but warn if
+            # there is an apparent inconsistency.
+            if os.path.exists(projectpath + '/.config'):
+                self.print('Warning:  -ef_format used in apparently non-efabless setup.')
+            elif self.techpath:
+                if os.path.exists(self.techpath + '/.config'):
+                    self.print('Warning:  -ef_format used in apparently non-efabless setup.')
+
+        # Check for project.json
+
+        jsonname = None
+        if os.path.isfile(projectpath + '/project.json'):
+            jsonname = projectpath + '/project.json'
+        elif os.path.isfile(projectroot + '/' + projectdirname + '.json'):
+            jsonname = projectroot + '/' + projectdirname + '.json'
+        if os.path.isfile(projectroot + '/project.json'):
+            # Just in case this was started from some other subdirectory
+            projectpath = projectroot
+            jsonname = projectroot + '/project.json'
+
+        if jsonname:
+            self.print('Reading project JSON file ' + jsonname)
+            with open(jsonname, 'r') as ifile:
+                topdata = json.load(ifile)
+                if 'data-sheet' in topdata:
+                    dsheet = topdata['data-sheet']
+                    if 'ip-name' in dsheet:
+                        self.project = dsheet['ip-name']
+                        self.projectpath = projectpath
+        else:
+            self.print('No project JSON file; using directory name as the project name.')
+            self.project = os.path.split(projectpath)[1]
+            self.projectpath = projectpath
+
+        self.print('Project name is ' + self.project + ' (' + self.projectpath + ')')
+
+    # Functions for drag-and-drop capability
+    def add_draggable(self, tag):
+        self.canvas.tag_bind(tag, '<ButtonPress-1>', self.on_button_press)
+        self.canvas.tag_bind(tag, '<ButtonRelease-1>', self.on_button_release)
+        self.canvas.tag_bind(tag, '<B1-Motion>', self.on_button_motion)
+        self.canvas.tag_bind(tag, '<ButtonPress-2>', self.on_button2_press)
+        self.canvas.tag_bind(tag, '<ButtonPress-3>', self.on_button3_press)
+
+    def on_button_press(self, event):
+        '''Begining drag of an object'''
+        # Find the closest item, then record its tag.
+        locx = event.x + self.canvas.canvasx(0)
+        locy = event.y + self.canvas.canvasy(0)
+        item = self.canvas.find_closest(locx, locy)[0]
+        self.event_data['tag'] = self.canvas.gettags(item)[0]
+        self.event_data['x0'] = event.x
+        self.event_data['y0'] = event.y
+        self.event_data['x'] = event.x
+        self.event_data['y'] = event.y
+
+    def on_button2_press(self, event):
+        '''Flip an object (excluding corners)'''
+        locx = event.x + self.canvas.canvasx(0)
+        locy = event.y + self.canvas.canvasy(0)
+        item = self.canvas.find_closest(locx, locy)[0]
+        tag = self.canvas.gettags(item)[0]
+
+        try:
+            corecell = next(item for item in self.coregroup if item['name'] == tag)
+        except:
+            try:
+                pad = next(item for item in self.Npads if item['name'] == tag)
+            except:
+                pad = None
+            if not pad:
+                try:
+                    pad = next(item for item in self.Epads if item['name'] == tag)
+                except:
+                    pad = None
+            if not pad:
+                try:
+                    pad = next(item for item in self.Spads if item['name'] == tag)
+                except:
+                    pad = None
+            if not pad:
+                try:
+                    pad = next(item for item in self.Wpads if item['name'] == tag)
+                except:
+                    pad = None
+            if not pad:
+                self.print('Error: Object cannot be flipped.')
+            else:
+                # Flip the pad (in the only way meaningful for the pad).
+                orient = pad['o']
+                if orient == 'N':
+                    pad['o'] = 'FN'
+                elif orient == 'E':
+                    pad['o'] = 'FW'
+                elif orient == 'S':
+                    pad['o'] = 'FS'
+                elif orient == 'W':
+                    pad['o'] = 'FE'
+                elif orient == 'FN':
+                    pad['o'] = 'N'
+                elif orient == 'FE':
+                    pad['o'] = 'W'
+                elif orient == 'FS':
+                    pad['o'] = 'S'
+                elif orient == 'FW':
+                    pad['o'] = 'E'
+        else:
+            # Flip the cell.  Use the DEF meaning of flip, which is to
+            # add or subtract 'F' from the orientation.
+            orient = corecell['o']
+            if not 'F' in orient:
+                corecell['o'] = 'F' + orient
+            else:
+                corecell['o'] = orient[1:]
+
+        # Redraw
+        self.populate(0)
+
+    def on_button3_press(self, event):
+        '''Rotate a core object (no pads) '''
+        locx = event.x + self.canvas.canvasx(0)
+        locy = event.y + self.canvas.canvasy(0)
+        item = self.canvas.find_closest(locx, locy)[0]
+        tag = self.canvas.gettags(item)[0]
+
+        try:
+            corecell = next(item for item in self.coregroup if item['name'] == tag)
+        except:
+            self.print('Error: Object cannot be rotated.')
+        else:
+            # Modify its orientation
+            orient = corecell['o']
+            if orient == 'N':
+                corecell['o'] = 'E'
+            elif orient == 'E':
+                corecell['o'] = 'S'
+            elif orient == 'S':
+                corecell['o'] = 'W'
+            elif orient == 'W':
+                corecell['o'] = 'N'
+            elif orient == 'FN':
+                corecell['o'] = 'FW'
+            elif orient == 'FW':
+                corecell['o'] = 'FS'
+            elif orient == 'FS':
+                corecell['o'] = 'FE'
+            elif orient == 'FE':
+                corecell['o'] = 'FN'
+
+            # rewrite the core DEF file
+            self.write_core_def()
+
+        # Redraw
+        self.populate(0)
+
+    def on_button_motion(self, event):
+        '''Handle dragging of an object'''
+        # compute how much the mouse has moved
+        delta_x = event.x - self.event_data['x']
+        delta_y = event.y - self.event_data['y']
+        # move the object the appropriate amount
+        self.canvas.move(self.event_data['tag'], delta_x, delta_y)
+        # record the new position
+        self.event_data['x'] = event.x
+        self.event_data['y'] = event.y
+
+    def on_button_release(self, event):
+        '''End drag of an object'''
+
+        # Find the pad associated with the tag and update its position information
+        tag = self.event_data['tag']
+
+        # Collect pads in clockwise order.  Note that E and S rows are not clockwise
+        allpads = []
+        allpads.extend(self.Npads)
+        allpads.extend(self.NEpad)
+        allpads.extend(reversed(self.Epads))
+        allpads.extend(self.SEpad)
+        allpads.extend(reversed(self.Spads))
+        allpads.extend(self.SWpad)
+        allpads.extend(self.Wpads)
+        allpads.extend(self.NWpad)
+
+        # Create a list of row references (also in clockwise order, but no reversing)
+        padrows = [self.Npads, self.NEpad, self.Epads, self.SEpad, self.Spads, self.SWpad, self.Wpads, self.NWpad]
+
+        # Record the row or corner where this pad was located before the move
+        for row in padrows:
+            try:
+                pad = next(item for item in row if item['name'] == tag)
+            except:
+                pass
+            else:
+                padrow = row
+                break
+
+        # Currently there is no procedure to move a pad out of the corner
+        # position;  corners are fixed by definition.
+        if padrow == self.NEpad or padrow == self.SEpad or padrow == self.SWpad or padrow == self.NWpad:
+            # Easier to run generate() than to put the pad back. . .
+            self.generate(0)
+            return
+
+        # Find the original center point of the pad being moved
+
+        padllx = pad['x']
+        padlly = pad['y']
+        if pad['o'] == 'N' or pad['o'] == 'S':
+            padurx = padllx + pad['width']
+            padury = padlly + pad['height']
+        else:
+            padurx = padllx + pad['height']
+            padury = padlly + pad['width']
+        padcx = (padllx + padurx) / 2
+        padcy = (padlly + padury) / 2
+
+        # Add distance from drag information (note that drag position in y
+        # is negative relative to the chip dimensions)
+        padcx += (self.event_data['x'] - self.event_data['x0']) / self.scale
+        padcy -= (self.event_data['y'] - self.event_data['y0']) / self.scale
+
+        # reset the drag information
+        self.event_data['tag'] = None
+        self.event_data['x'] = 0
+        self.event_data['y'] = 0
+        self.event_data['x0'] = 0
+        self.event_data['y0'] = 0
+
+        # Find the distance from the pad to all other pads, and get the two
+        # closest entries.
+
+        wwidth = self.urx - self.llx
+        dist0 = wwidth
+        dist1 = wwidth
+        pad0 = None
+        pad1 = None
+          
+        for npad in allpads:
+            if npad == pad:
+                continue
+
+            npadllx = npad['x']
+            npadlly = npad['y']
+            if npad['o'] == 'N' or npad['o'] == 'S':
+                npadurx = npadllx + npad['width']
+                npadury = npadlly + npad['height']
+            else:
+                npadurx = npadllx + npad['height']
+                npadury = npadlly + npad['width']
+            npadcx = (npadllx + npadurx) / 2
+            npadcy = (npadlly + npadury) / 2
+
+            deltx = npadcx - padcx
+            delty = npadcy - padcy
+            pdist = math.sqrt(deltx * deltx + delty * delty)
+            if pdist < dist0:
+                dist1 = dist0
+                pad1 = pad0
+                dist0 = pdist
+                pad0 = npad
+
+            elif pdist < dist1:
+                dist1 = pdist
+                pad1 = npad
+
+        # Diagnostic
+        # self.print('Two closest pads to pad ' + pad['name'] + ' (' + pad['cell'] + '): ')
+        # self.print(pad0['name'] + ' (' + pad0['cell'] + ') dist = ' + str(dist0))
+        # self.print(pad1['name'] + ' (' + pad1['cell'] + ') dist = ' + str(dist1))
+
+        # Record the row or corner where these pads are
+        for row in padrows:
+            try:
+                testpad = next(item for item in row if item['name'] == pad0['name'])
+            except:
+                pass
+            else:
+                padrow0 = row
+                break
+
+        for row in padrows:
+            try:
+                testpad = next(item for item in row if item['name'] == pad1['name'])
+            except:
+                pass
+            else:
+                padrow1 = row
+                break
+
+        # Remove pad from its own row
+        padrow.remove(pad)
+
+        # Insert pad into new row.  Watch for wraparound from the last entry to the first
+        padidx0 = allpads.index(pad0)
+        padidx1 = allpads.index(pad1)
+        if padidx0 == 0 and padidx1 > 2:
+            padidx1 = -1
+
+        if padidx1 > padidx0:
+            padafter = pad1
+            rowafter = padrow1
+            padbefore = pad0
+            rowbefore = padrow0
+        else:
+            padafter = pad0
+            rowafter = padrow0
+            padbefore = pad1
+            rowbefore = padrow1
+
+        # Do not replace corner positions (? may be necessary ?)
+        if rowafter == self.NWpad:
+            self.Wpads.append(pad)
+        elif rowafter == self.NWpad:
+            self.Npads.append(pad)
+        elif rowafter == self.SEpad:
+            self.Epads.insert(0, pad)
+        elif rowafter == self.SWpad:
+            self.Spads.insert(0, pad)
+        elif rowafter == self.Wpads or rowafter == self.Npads:
+            idx = rowafter.index(padafter)
+            rowafter.insert(idx, pad)
+        elif rowbefore == self.NEpad:
+            self.Epads.append(pad)
+        elif rowbefore == self.SEpad:
+            self.Spads.append(pad)
+        else:
+            # rows E and S are ordered counterclockwise
+            idx = rowbefore.index(padbefore)
+            rowbefore.insert(idx, pad)
+
+        # Re-run padring
+        self.generate(0)
+
+    def on_scrollwheel(self, event):
+        if event.num == 4:
+            zoomval = 1.1;
+        elif event.num == 5:
+            zoomval = 0.9;
+        else:
+            zoomval = 1.0;
+
+        self.scale *= zoomval
+        self.canvas.scale('all', -15 * zoomval, -15 * zoomval, zoomval, zoomval)
+        self.event_data['x'] *= zoomval
+        self.event_data['y'] *= zoomval
+        self.event_data['x0'] *= zoomval
+        self.event_data['y0'] *= zoomval
+        self.frame_configure(event)
+
+    # Callback functions similar to the pad event callbacks above, but for
+    # core cells.  Unlike pad cells, core cells can be rotated and flipped
+    # arbitrarily, and they do not force a recomputation of the padframe
+    # unless their position forces the padframe to expand
+
+    def add_core_draggable(self, tag):
+        self.canvas.tag_bind(tag, '<ButtonPress-1>', self.on_button_press)
+        self.canvas.tag_bind(tag, '<ButtonRelease-1>', self.core_on_button_release)
+        self.canvas.tag_bind(tag, '<B1-Motion>', self.on_button_motion)
+        self.canvas.tag_bind(tag, '<ButtonPress-2>', self.on_button2_press)
+        self.canvas.tag_bind(tag, '<ButtonPress-3>', self.on_button3_press)
+
+    def core_on_button_release(self, event):
+        '''End drag of a core cell'''
+
+        # Find the pad associated with the tag and update its position information
+        tag = self.event_data['tag']
+
+        try:
+            corecell = next(item for item in self.coregroup if item['name'] == tag)
+        except:
+            self.print('Error: cell ' + item['name'] + ' is not in coregroup!')
+        else:  
+            # Modify its position values
+            corex = corecell['x']
+            corey = corecell['y']
+
+            # Add distance from drag information (note that drag position in y
+            # is negative relative to the chip dimensions)
+            deltax = (self.event_data['x'] - self.event_data['x0']) / self.scale
+            deltay = (self.event_data['y'] - self.event_data['y0']) / self.scale
+
+            corecell['x'] = corex + deltax
+            corecell['y'] = corey - deltay
+
+            # rewrite the core DEF file
+            self.write_core_def()
+
+        # reset the drag information
+        self.event_data['tag'] = None
+        self.event_data['x'] = 0
+        self.event_data['y'] = 0
+        self.event_data['x0'] = 0
+        self.event_data['y0'] = 0
+
+    # Critically needed or else frame does not resize to scrollbars!
+    def grid_configure(self, padx, pady):
+        pass
+
+    # Redraw the chip frame view in response to changes in the pad list
+    def redraw_frame(self):
+        self.canvas.coords('boundary', self.llx, self.urx, self.lly, self.ury)
+   
+    # Update the canvas scrollregion to incorporate all the interior windows
+    def frame_configure(self, event):
+        if self.do_gui == False:
+            return
+        self.update_idletasks()
+        bbox = self.canvas.bbox("all")
+        try:
+            newbbox = (-15, -15, bbox[2] + 15, bbox[3] + 15)
+        except:
+            pass
+        else:
+            self.canvas.configure(scrollregion = newbbox)
+
+    # Fill the GUI entries with resident data
+    def populate(self, level):
+        if self.do_gui == False:
+            return
+
+        if level > 1:
+            self.print('Recursion error:  Returning now.')
+            return
+
+        self.print('Populating floorplan view.')
+
+        # Remove all entries from the canvas
+        self.canvas.delete('all')
+
+        allpads = self.Npads + self.NEpad + self.Epads + self.SEpad + self.Spads + self.SWpad + self.Wpads + self.NWpad
+
+        notfoundlist = []
+
+        for pad in allpads:
+            if 'x' not in pad:
+                self.print('Error:  Pad ' + pad['name'] + ' has no placement information.')
+                continue
+            llx = int(pad['x'])
+            lly = int(pad['y'])
+            pado = pad['o']
+            try:
+                padcell = next(item for item in self.celldefs if item['name'] == pad['cell'])
+            except:
+                # This should not happen (failsafe)
+                if pad['cell'] not in notfoundlist:
+                    self.print('Warning:  there is no cell named ' + pad['cell'] + ' in the libraries.')
+                notfoundlist.append(pad['cell'])
+                continue
+            padw = padcell['width']
+            padh = padcell['height']
+            if 'N' in pado or 'S' in pado:
+                urx = int(llx + padw)
+                ury = int(lly + padh)
+            else:
+                urx = int(llx + padh)
+                ury = int(lly + padw)
+            
+            pad['llx'] = llx
+            pad['lly'] = lly
+            pad['urx'] = urx
+            pad['ury'] = ury
+
+        # Note that the DEF coordinate system is reversed in Y from the canvas. . .
+
+        height = self.ury - self.lly
+        for pad in allpads:
+
+            llx = pad['llx']
+            lly = height - pad['lly']
+            urx = pad['urx']
+            ury = height - pad['ury']
+
+            tag_id = pad['name']
+            if 'subclass' in pad:
+                if pad['subclass'] == 'POWER':
+                    pad_color = 'orange2'
+                elif pad['subclass'] == 'INOUT':
+                    pad_color = 'yellow'
+                elif pad['subclass'] == 'OUTPUT':
+                    pad_color = 'powder blue'
+                elif pad['subclass'] == 'INPUT':
+                    pad_color = 'goldenrod1'
+                elif pad['subclass'] == 'SPACER':
+                    pad_color = 'green yellow'
+                elif pad['class'] == 'ENDCAP':
+                    pad_color = 'green yellow'
+                elif pad['subclass'] == '' or pad['class'] == ';':
+                    pad_color = 'khaki1'
+                else:
+                    self.print('Unhandled pad class ' + pad['class'])
+                    pad_color = 'gray'
+            else:
+                 pad_color = 'gray'
+
+            sllx = self.scale * llx
+            slly = self.scale * lly
+            surx = self.scale * urx
+            sury = self.scale * ury
+
+            self.canvas.create_rectangle((sllx, slly), (surx, sury), fill=pad_color, tags=[tag_id])
+            cx = (sllx + surx) / 2
+            cy = (slly + sury) / 2
+
+            s = 10 if pad['width'] >= 10 else pad['width']
+            if pad['height'] < s:
+                s = pad['height']
+
+            # Create an indicator line at the bottom left corner of the cell
+            if pad['o'] == 'N':
+                allx = sllx
+                ally = slly - s
+                aurx = sllx + s
+                aury = slly
+            elif pad['o'] == 'E':
+                allx = sllx
+                ally = sury + s
+                aurx = sllx + s
+                aury = sury
+            elif pad['o'] == 'S':
+                allx = surx
+                ally = sury + s
+                aurx = surx - s
+                aury = sury
+            elif pad['o'] == 'W':
+                allx = surx
+                ally = slly - s
+                aurx = surx - s
+                aury = slly
+            elif pad['o'] == 'FN':
+                allx = surx
+                ally = slly - s
+                aurx = surx - s
+                aury = slly
+            elif pad['o'] == 'FE':
+                allx = surx
+                ally = sury + s
+                aurx = surx - s
+                aury = sury
+            elif pad['o'] == 'FS':
+                allx = sllx
+                ally = sury + s
+                aurx = sllx + s
+                aury = sury
+            elif pad['o'] == 'FW':
+                allx = sllx
+                ally = slly - s
+                aurx = sllx + s
+                aury = slly
+            self.canvas.create_line((allx, ally), (aurx, aury), tags=[tag_id])
+ 
+            # Rotate text on top and bottom rows if the tkinter version allows it.
+            if tkinter.TclVersion >= 8.6:
+                if pad['o'] == 'N' or pad['o'] == 'S':
+                    angle = 90
+                else:
+                    angle = 0
+                self.canvas.create_text((cx, cy), text=pad['name'], angle=angle, tags=[tag_id])
+            else:
+                self.canvas.create_text((cx, cy), text=pad['name'], tags=[tag_id])
+
+            # Make the pad draggable
+            self.add_draggable(tag_id)
+
+        # Now add the core cells
+        for cell in self.coregroup:
+            if 'x' not in cell:
+                self.print('Error:  Core cell ' + cell['name'] + ' has no placement information.')
+                continue
+            # else:
+            #     self.print('Diagnostic:  Creating object for core cell ' + cell['name'])
+            llx = int(cell['x'])
+            lly = int(cell['y'])
+            cello = cell['o']
+            try:
+                corecell = next(item for item in self.coredefs if item['name'] == cell['cell'])
+            except:
+                # This should not happen (failsafe)
+                if cell['cell'] not in notfoundlist:
+                    self.print('Warning:  there is no cell named ' + cell['cell'] + ' in the libraries.')
+                notfoundlist.append(cell['cell'])
+                continue
+            cellw = corecell['width']
+            cellh = corecell['height']
+            if 'N' in cello or 'S' in cello:
+                urx = int(llx + cellw)
+                ury = int(lly + cellh)
+            else:
+                urx = int(llx + cellh)
+                ury = int(lly + cellw)
+                print('NOTE: cell ' + corecell['name'] + ' is rotated, w = ' + str(urx - llx) + '; h = ' + str(ury - lly))
+
+            cell['llx'] = llx
+            cell['lly'] = lly
+            cell['urx'] = urx
+            cell['ury'] = ury
+
+        # Watch for out-of-window position in core cells.
+        corellx = self.llx
+        corelly = self.lly
+        coreurx = self.urx
+        coreury = self.ury
+
+        for cell in self.coregroup:
+
+            if 'llx' not in cell:
+                # Error message for this was handled above
+                continue
+
+            llx = cell['llx']
+            lly = height - cell['lly']
+            urx = cell['urx']
+            ury = height - cell['ury']
+
+            # Check for out-of-window cell
+            if llx < corellx:
+                corellx = llx
+            if lly < corelly:
+                corelly = lly
+            if urx > coreurx:
+                coreurx = urx
+            if ury > coreury:
+                coreury = ury
+
+            tag_id = cell['name']
+            cell_color = 'gray40'
+
+            sllx = self.scale * llx
+            slly = self.scale * lly
+            surx = self.scale * urx
+            sury = self.scale * ury
+
+            self.canvas.create_rectangle((sllx, slly), (surx, sury), fill=cell_color, tags=[tag_id])
+            cx = (sllx + surx) / 2
+            cy = (slly + sury) / 2
+
+            s = 10 if cell['width'] >= 10 else cell['width']
+            if cell['height'] < s:
+                s = cell['height']
+
+            # Create an indicator line at the bottom left corner of the cell
+            if cell['o'] == 'N':
+                allx = sllx
+                ally = slly - s
+                aurx = sllx + s
+                aury = slly
+            elif cell['o'] == 'E':
+                allx = sllx
+                ally = sury + s
+                aurx = sllx + s
+                aury = sury
+            elif cell['o'] == 'S':
+                allx = surx
+                ally = sury + s
+                aurx = surx - s
+                aury = sury
+            elif cell['o'] == 'W':
+                allx = surx
+                ally = slly - s
+                aurx = surx - s
+                aury = slly
+            elif cell['o'] == 'FN':
+                allx = surx
+                ally = slly - s
+                aurx = surx - s
+                aury = slly
+            elif cell['o'] == 'FE':
+                allx = surx
+                ally = sury + s
+                aurx = surx - s
+                aury = sury
+            elif cell['o'] == 'FS':
+                allx = sllx
+                ally = sury + s
+                aurx = sllx + s
+                aury = sury
+            elif cell['o'] == 'FW':
+                allx = sllx
+                ally = slly - s
+                aurx = sllx + s
+                aury = slly
+            self.canvas.create_line((allx, ally), (aurx, aury), tags=[tag_id])
+ 
+            # self.print('Created entry for cell ' + cell['name'] + ' at {0:g}, {1:g}'.format(cx, cy))
+ 
+            # Rotate text on top and bottom rows if the tkinter version allows it.
+            if tkinter.TclVersion >= 8.6:
+                if 'N' in cell['o'] or 'S' in cell['o']:
+                    angle = 90
+                else:
+                    angle = 0
+                self.canvas.create_text((cx, cy), text=cell['name'], angle=angle, tags=[tag_id])
+            else:
+                self.canvas.create_text((cx, cy), text=cell['name'], tags=[tag_id])
+
+            # Make the core cell draggable
+            self.add_core_draggable(tag_id)
+
+        # Is there a boundary size defined?
+        if self.urx > self.llx and self.ury > self.lly:
+            self.create_boundary()
+
+        # Did the core extend into negative X or Y?  If so, adjust all canvas
+        # coordinates to fit in the window, or else objects cannot be reached
+        # even by zooming out (since zooming is pinned on the top corner).
+
+        offsetx = 0
+        offsety = 0
+
+        # NOTE:  Probably want to check if the core exceeds the inner
+        # dimension of the pad ring, not the outer (to check and to do).
+
+        if corellx < self.llx:
+            offsetx = self.llx - corellx 
+        if corelly < self.lly:
+            offsety = self.lly - corelly
+        if offsetx > 0 or offsety > 0:
+            self.canvas.move("all", offsetx, offsety)
+            # An offset implies that the chip is core limited, and the
+            # padframe requires additional space.  This can be accomplished
+            # simply by running "Generate".  NOTE:  Since generate() calls
+            # populate(), be VERY SURE that this does not infinitely recurse!
+            self.generate(level)
+
+    # Generate a DEF file of the core area
+
+    def write_core_def(self):
+        self.print('Writing core placementment information in DEF file "core.def".')
+
+        mag_path = self.projectpath + '/mag'
+
+        # The core cells must always clear the I/O pads on the left and
+        # bottom (with the ad-hoc margin of self.margin).  If core cells have
+        # been moved to the left or down past the padframe edge, then the
+        # entire core needs to be repositioned.
+
+        # To be done:  draw a boundary around the core, let the edges of that
+        # boundary be draggable, and let the difference between the boundary
+        # and the core area define the margin.
+
+        if self.SWpad != []:
+            corellx = self.SWpad[0]['x'] + self.SWpad[0]['width'] + self.margin
+            corelly = self.SWpad[0]['y'] + self.SWpad[0]['height'] + self.margin
+        else:
+            corellx = self.Wpads[0]['x'] + self.Wpads[0]['height'] + self.margin
+            corelly = self.Spads[0]['x'] + self.Spads[0]['height'] + self.margin
+
+        offsetx = 0
+        offsety = 0
+        for corecell in self.coregroup:
+            if corecell['x'] < corellx:
+                if corellx - corecell['x'] > offsetx:
+                    offsetx = corellx - corecell['x']
+            if corecell['y'] < corelly:
+                if corelly - corecell['y'] > offsety:
+                    offsety = corelly - corecell['y']
+        if offsetx > 0 or offsety > 0:
+            for corecell in self.coregroup:
+                corecell['x'] += offsetx
+                corecell['y'] += offsety
+
+        # Now write the core DEF file
+
+        with open(mag_path + '/core.def', 'w') as ofile:
+            print('DESIGN CORE ;', file=ofile)
+            print('UNITS DISTANCE MICRONS 1000 ;', file=ofile)
+            print('COMPONENTS {0:d} ;'.format(len(self.coregroup)), file=ofile)
+            for corecell in self.coregroup:
+                print('  - ' + corecell['name'] + ' ' + corecell['cell'], file=ofile)
+                print('    + PLACED ( {0:d} {1:d} ) {2:s} ;'.format(int(corecell['x'] * 1000), int(corecell['y'] * 1000), corecell['o']), file=ofile)
+            print ('END COMPONENTS', file=ofile)
+            print ('END DESIGN', file=ofile)
+
+    # Create the chip boundary area
+
+    def create_boundary(self):
+        scale = self.scale
+        llx = (self.llx - 10) * scale
+        lly = (self.lly - 10) * scale
+        urx = (self.urx + 10) * scale
+        ury = (self.ury + 10) * scale
+
+        pad_color = 'plum1'
+        tag_id = 'boundary'
+        self.canvas.create_rectangle((llx, lly), (urx, ury), outline=pad_color, width=2, tags=[tag_id])
+        # Add text to the middle representing the chip and core areas
+        cx = ((self.llx + self.urx) / 2) * scale
+        cy = ((self.lly + self.ury) / 2) * scale
+        width = self.urx - self.llx
+        height = self.ury - self.lly
+        areatext = 'Chip dimensions (um): {0:g} x {1:g}'.format(width, height)
+        tag_id = 'chiparea' 
+        self.canvas.create_text((cx, cy), text=areatext, tags=[tag_id])
+
+    # Rotate orientation according to self.pad_rotation. 
+
+    def rotate_orientation(self, orient_in):
+        orient_v = ['N', 'E', 'S', 'W', 'N', 'E', 'S', 'W']
+        idxadd = int(self.pad_rotation / 90)
+        idx = orient_v.index(orient_in)
+        return orient_v[idx + idxadd]
+
+    # Read a list of cell macros (name, size, class) from a LEF library
+
+    def read_lef_macros(self, libpath, libname = None, libtype = 'iolib'):
+        if libtype == 'iolib':
+            libtext = 'I/O '
+        elif libtype == 'celllib':
+            libtext = 'core '
+        else:
+            libtext = ''
+
+        macros = []
+
+        if libname:
+            if os.path.splitext(libname)[1] == '':
+                libname += '.lef'
+            leffiles = glob.glob(libpath + '/' + libname)
+        else:
+            leffiles = glob.glob(libpath + '/*.lef')
+        if leffiles == []:
+            if libname:
+                self.print('WARNING:  No file ' + libpath + '/' + libname + '.lef')
+            else:
+                self.print('WARNING:  No files ' + libpath + '/*.lef')
+        for leffile in leffiles:
+            libpath = os.path.split(leffile)[0]
+            libname = os.path.split(libpath)[1]
+            self.print('Reading LEF ' + libtext + 'library ' + leffile)
+            with open(leffile, 'r') as ifile:
+                ilines = ifile.read().splitlines()
+                in_macro = False
+                for iline in ilines:
+                    iparse = iline.split()
+                    if iparse == []:
+                        continue
+                    elif iparse[0] == 'MACRO':
+                        in_macro = True
+                        newmacro = {}
+                        newmacro['name'] = iparse[1]
+                        newmacro[libtype] = leffile
+                        macros.append(newmacro)
+                    elif in_macro:
+                        if iparse[0] == 'END':
+                            if len(iparse) > 1 and iparse[1] == newmacro['name']:
+                                in_macro = False
+                        elif iparse[0] == 'CLASS':
+                            newmacro['class'] = iparse[1]
+                            if len(iparse) > 2:
+                                newmacro['subclass'] = iparse[2]
+
+                                # Use the 'ENDCAP' class to identify pad rotations
+                                # other than BOTTOMLEFT.  This is somewhat ad-hoc
+                                # depending on the foundry;  may not be generally
+                                # applicable.
+
+                                if newmacro['class'] == 'ENDCAP':
+                                    if newmacro['subclass'] == 'TOPLEFT':
+                                        self.pad_rotation = 90
+                                    elif newmacro['subclass'] == 'TOPRIGHT':
+                                        self.pad_rotation = 180
+                                    elif newmacro['subclass'] == 'BOTTOMRIGHT':
+                                        self.pad_rotation = 270
+                            else:
+                                newmacro['subclass'] = None
+                        elif iparse[0] == 'SIZE':
+                            newmacro['width'] = float(iparse[1])
+                            newmacro['height'] = float(iparse[3])
+                        elif iparse[0] == 'ORIGIN':
+                            newmacro['x'] = float(iparse[1])
+                            newmacro['y'] = float(iparse[2])
+        return macros
+          
+    # Read a list of cell names from a verilog file
+    # If filename is relative, then check in the same directory as the verilog
+    # top-level netlist (vlogpath) and in the subdirectory 'source/' of the top-
+    # level directory.  Also check in the ~/design/ip/ directory.  These are
+    # common include paths for the simulation.
+
+    def read_verilog_lib(self, incpath, vlogpath):
+        iocells = []
+        if not os.path.isfile(incpath) and incpath[0] != '/':
+            locincpath = vlogpath + '/' + incpath
+            if not os.path.isfile(locincpath):
+                locincpath = vlogpath + '/source/' + incpath
+            if not os.path.isfile(locincpath):
+                projectpath = os.path.split(vlogpath)[0]
+                designpath = os.path.split(projectpath)[0]
+                locincpath = designpath + '/ip/' + incpath
+        else:
+            locincpath = incpath
+
+        if not os.path.isfile(locincpath):
+            self.print('File ' + incpath + ' not found (at ' + locincpath + ')!')
+        else:
+            self.print('Reading verilog library ' + locincpath)
+            with open(locincpath, 'r') as ifile:
+                ilines = ifile.read().splitlines()
+                for iline in ilines:
+                    iparse = re.split('[\t ()]', iline)
+                    while '' in iparse:
+                        iparse.remove('')
+                    if iparse == []:
+                        continue
+                    elif iparse[0] == 'module':
+                        iocells.append(iparse[1])
+        return iocells
+
+    # Generate a LEF abstract view from a magic layout.  If "outpath" is not
+    # "None", then write output to outputpath (this is required if the input
+    # file is in a read-only directory).
+
+    def write_lef_file(self, magfile, outpath=None):
+        mag_path = os.path.split(magfile)[0]
+        magfullname = os.path.split(magfile)[1]
+        module = os.path.splitext(magfullname)[0]
+
+        if outpath:
+            write_path = outpath
+        else:
+            write_path = mag_path
+
+        self.print('Generating LEF view from layout for module ' + module)
+
+        with open(write_path + '/pfg_write_lef.tcl', 'w') as ofile:
+            print('drc off', file=ofile)
+            print('box 0 0 0 0', file=ofile)
+            # NOTE:  Using "-force" option in case an IP with a different but
+            # compatible tech is used (e.g., EFHX035A IP inside EFXH035C).  This
+            # is not checked for legality!
+            if outpath:
+                print('load ' + magfile + ' -force', file=ofile)
+            else:
+                print('load ' + module + ' -force', file=ofile)
+            print('lef write -hide', file=ofile)
+            print('quit', file=ofile)
+
+        magicexec = self.magic_path if self.magic_path else 'magic'
+        mproc = subprocess.Popen([magicexec, '-dnull', '-noconsole',
+			'pfg_write_lef.tcl'],
+			stdin = subprocess.PIPE, stdout = subprocess.PIPE,
+			stderr = subprocess.PIPE, cwd = write_path, universal_newlines = True)
+
+        self.watch(mproc)
+        os.remove(write_path + '/pfg_write_lef.tcl')
+
+    # Watch a running process, polling for output and updating the GUI message
+    # window as output arrives.  Return only when the process has exited.
+    # Note that this process cannot handle stdin(), so any input to the process
+    # must be passed from a file.
+
+    def watch(self, process):
+        if process == None:
+            return
+
+        while True:
+            status = process.poll()
+            if status != None:
+                try:
+                    outputpair = process.communicate(timeout=1)
+                except ValueError:
+                    self.print("Process forced stop, status " + str(status))
+                else:
+                    for line in outputpair[0].splitlines():
+                        self.print(line)
+                    for line in outputpair[1].splitlines():
+                        self.print(line, file=sys.stderr)
+                break
+            else:
+                sresult = select.select([process.stdout, process.stderr], [], [], 0)[0]
+                if process.stdout in sresult:
+                    outputline = process.stdout.readline().strip()
+                    self.print(outputline)
+                elif process.stderr in sresult:
+                    outputline = process.stderr.readline().strip()
+                    self.print(outputline, file=sys.stderr)
+                else:
+                    self.update_idletasks()
+
+    # Reimport the pad list by reading the top-level verilog netlist.  Determine
+    # what pads are listed in the file, and check against the existing pad list.
+
+    # The verilog/ directory should have a .v file containing a module of the
+    # same name as self.project (ip-name).  The .v filename should have the
+    # same name as well (but not necessarily).  To do:  Handle import of
+    # projects having a top-level schematic instead of a verilog netlist.
+
+    def vlogimport(self):
+
+        if self.ef_format:
+            config_dir = '/.ef-config'
+        else:
+            config_dir = '/.config'
+
+        # First find the process PDK name for this project.  Read the nodeinfo.json
+        # file and find the list of I/O cell libraries.  
+
+        if self.techpath:
+            pdkpath = self.techpath
+        elif os.path.islink(self.projectpath + config_dir + '/techdir'):
+            pdkpath = os.path.realpath(self.projectpath + config_dir + '/techdir')
+        else:
+            self.print('Error:  Cannot determine path to PDK.  Try using option -tech-path=')
+            return
+
+        self.print('Importing verilog sources.')
+
+        nodeinfopath = pdkpath + config_dir + '/nodeinfo.json'
+        ioleflist = []
+        if os.path.exists(nodeinfopath):
+            self.print('Reading known I/O cell libraries from ' + nodeinfopath)
+            with open(nodeinfopath, 'r') as ifile:
+                itop = json.load(ifile)
+                if 'iocells' in itop:
+                    ioleflist = []
+                    for iolib in itop['iocells']:
+                        if '/' in iolib:
+                            # Entries <lib>/<cell> refer to specific files
+                            if self.ef_format:
+                                iolibpath = pdkpath + '/libs.ref/lef/' + iolib
+                            else:
+                                iolibpath = pdkpath + '/libs.ref/' + iolib
+                            if os.path.splitext(iolib)[1] == '':
+                                if not os.path.exists(iolibpath):
+                                    iolibpath = iolibpath + '.lib'
+                            if not os.path.exists(iolibpath):
+                                self.print('Warning: nodeinfo.json bad I/O library path ' + iolibpath)
+                            ioleflist.append(iolibpath)
+                        else:
+                            # All other entries refer to everything in the directory.
+                            if self.ef_format:
+                                iolibpath = pdkpath + '/libs.ref/lef/' + iolib
+                            else:
+                                iolibpath = pdkpath + '/libs.ref/' + iolib + '/lef/'
+                            iolibfiles = glob.glob(iolibpath + '/*.lef')
+                            if len(iolibfiles) == 0:
+                                self.print('Warning: nodeinfo.json bad I/O library path ' + iolibpath)
+                            ioleflist.extend(iolibfiles)
+        else:
+            # Diagnostic
+            self.print('Cannot read PDK information file ' + nodeinfopath)
+
+        # Fallback behavior:  List everything in libs.ref/lef/ beginning with "IO"
+        if len(ioleflist) == 0:
+            if self.ef_format:
+                ioleflist = glob.glob(pdkpath + '/libs.ref/lef/IO*/*.lef')
+            else:
+                ioleflist = glob.glob(pdkpath + '/libs.ref/IO*/lef/*.lef')
+
+        if len(ioleflist) == 0:
+            self.print('Cannot find any I/O cell libraries for this technology')
+            return
+
+        # Read the LEF libraries to get a list of all available cells.  Keep
+        # this list of cells in "celldefs".
+
+        celldefs = []
+        ioliblist = []
+        ioleflibs = []
+        for iolib in ioleflist:
+            iolibpath = os.path.split(iolib)[0]
+            iolibfile = os.path.split(iolib)[1]
+            ioliblist.append(os.path.split(iolibpath)[1])
+            celldefs.extend(self.read_lef_macros(iolibpath, iolibfile, 'iolib'))
+
+        verilogcells = []
+        newpadlist = []
+        coredefs = []
+        corecells = []
+        corecelllist = []
+        lefprocessed = []
+
+        busrex = re.compile('.*\[[ \t]*([0-9]+)[ \t]*:[ \t]*([0-9]+)[ \t]*\]')
+
+        vlogpath = self.projectpath + '/verilog'
+        vlogfile = vlogpath + '/' + self.project + '.v'
+
+        # Verilog netlists are too difficult to parse from a simple script.
+        # Use qflow tools to convert to SPICE, if they are available.  Parse
+        # the verilog only for "include" statements to find the origin of
+        # the various IP blocks, and then parse the SPICE file to get the
+        # full list of instances.
+        #
+        # (to be done)
+
+        if os.path.isfile(vlogfile):
+            with open(vlogfile, 'r') as ifile:
+                vloglines = ifile.read().splitlines()
+                for vlogline in vloglines:
+                    vlogparse = re.split('[\t ()]', vlogline)
+                    while '' in vlogparse:
+                        vlogparse.remove('')
+                    if vlogparse == []:
+                        continue
+                    elif vlogparse[0] == '//':
+                        continue
+                    elif vlogparse[0] == '`include':
+                        incpath = vlogparse[1].strip('"')
+                        libpath = os.path.split(incpath)[0]
+                        libname = os.path.split(libpath)[1]
+                        libfile = os.path.split(incpath)[1]
+
+                        # Read the verilog library for module names to match
+                        # against macro names in celldefs.
+                        modulelist = self.read_verilog_lib(incpath, vlogpath)
+                        matching = list(item for item in celldefs if item['name'] in modulelist)
+                        for imatch in matching:
+                            verilogcells.append(imatch['name'])
+                            leffile = imatch['iolib']
+                            if leffile not in ioleflibs:
+                                ioleflibs.append(leffile)
+
+                        # Read a corresponding LEF file entry for non-I/O macros, if one
+                        # can be found (this handles files in the PDK).
+                        if len(matching) == 0:
+                            if libname != '':
+                                # (NOTE:  Assumes full path starting with '/')
+                                lefpath = libpath.replace('verilog', 'lef')
+                                lefname = libfile.replace('.v', '.lef')
+                                if not os.path.exists(lefpath + '/' + lefname):
+                                    leffiles = glob.glob(lefpath + '/*.lef')
+                                else:
+                                    leffiles = [lefpath + '/' + lefname]
+
+                                for leffile in leffiles:
+                                    if leffile in ioleflibs:
+                                        continue
+                                    elif leffile in lefprocessed:
+                                        continue
+                                    else:
+                                        lefprocessed.append(leffile)
+
+                                    lefname = os.path.split(leffile)[1]
+
+                                    newcoredefs = self.read_lef_macros(lefpath, lefname, 'celllib')
+                                    coredefs.extend(newcoredefs)
+                                    corecells.extend(list(item['name'] for item in newcoredefs))
+
+                                if leffiles == []:
+                                    maglefname = libfile.replace('.v', '.mag')
+
+                                    # Handle PDK files with a maglef/ view but no LEF file.
+                                    maglefpath = libpath.replace('verilog', 'maglef')
+                                    if not os.path.exists(maglefpath + '/' + maglefname):
+                                        magleffiles = glob.glob(maglefpath + '/*.mag')
+                                    else:
+                                        magleffiles = [maglefpath + '/' + maglefname]
+
+                                    if magleffiles == []:
+                                        # Handle user ip/ files with a maglef/ view but
+                                        # no LEF file.
+                                        maglefpath = libpath.replace('verilog', 'maglef')
+                                        designpath = os.path.split(self.projectpath)[0]
+                                        maglefpath = designpath + '/ip/' + maglefpath
+
+                                        if not os.path.exists(maglefpath + '/' + maglefname):
+                                            magleffiles = glob.glob(maglefpath + '/*.mag')
+                                        else:
+                                            magleffiles = [maglefpath + '/' + maglefname]
+
+                                    for magleffile in magleffiles:
+                                        # Generate LEF file.  Since PDK and ip/ entries
+                                        # are not writeable, write into the project mag/
+                                        # directory.
+                                        magpath = self.projectpath + '/mag'
+                                        magname = os.path.split(magleffile)[1]
+                                        magroot = os.path.splitext(magname)[0]
+                                        leffile = magpath + '/' + magroot + '.lef'
+                                        if not os.path.isfile(leffile):
+                                            self.write_lef_file(magleffile, magpath)
+
+                                        if leffile in ioleflibs:
+                                            continue
+                                        elif leffile in lefprocessed:
+                                            continue
+                                        else:
+                                            lefprocessed.append(leffile)
+
+                                        lefname = os.path.split(leffile)[1]
+
+                                        newcoredefs = self.read_lef_macros(magpath, lefname, 'celllib')
+                                        coredefs.extend(newcoredefs)
+                                        corecells.extend(list(item['name'] for item in newcoredefs))
+                                        # LEF files generated on-the-fly are not needed
+                                        # after they have been parsed.
+                                        # os.remove(leffile)
+
+                            # Check if all modules in modulelist are represented by
+                            # corresponding LEF macros.  If not, then go looking for a LEF
+                            # file in the mag/ or maglef/ directory.  Then, go looking for
+                            # a .mag file in the mag/ or maglef/ directory, and build a
+                            # LEF macro from it.
+
+                            matching = list(item['name'] for item in coredefs if item['name'] in modulelist)
+                            for module in modulelist:
+                                if module not in matching:
+                                    lefpath = self.projectpath + '/lef'
+                                    magpath = self.projectpath + '/mag'
+                                    maglefpath = self.projectpath + '/mag'
+                                    lefname = libfile.replace('.v', '.lef')
+
+                                    # If the verilog file root name is not the same as
+                                    # the module name, then make a quick check for a
+                                    # LEF file with the same root name as the verilog.
+                                    # That indicates that the module does not exist in
+                                    # the LEF file, probably because it is a primary
+                                    # module that does not correspond to any layout.
+
+                                    leffile = lefpath + '/' + lefname
+                                    if os.path.exists(leffile):
+                                        self.print('Diagnostic: module ' + module + ' is not in ' + leffile + ' (probably a primary module)')
+                                        continue
+
+                                    leffile = magpath + '/' + lefname
+                                    istemp = False
+                                    if not os.path.exists(leffile):
+                                        magname = libfile.replace('.v', '.mag')
+                                        magfile = magpath + '/' + magname
+                                        if os.path.exists(magfile):
+                                            self.print('Diagnostic: Found a .mag file for ' + module + ' in ' + magfile)
+                                            self.write_lef_file(magfile)
+                                            istemp = True
+                                        else:
+                                            magleffile = maglefpath + '/' + lefname
+                                            if not os.path.exists(magleffile):
+                                                self.print('Diagnostic: (module ' + module + ') has no LEF file ' + leffile + ' or ' + magleffile)
+                                                magleffile = maglefpath + '/' + magname
+                                                if os.path.exists(magleffile):
+                                                    self.print('Diagnostic: Found a .mag file for ' + module + ' in ' + magleffile)
+                                                    if os.access(maglefpath, os.W_OK):
+                                                        self.write_lef_file(magleffile)
+                                                        leffile = magleffile
+                                                        istemp = True
+                                                    else:
+                                                        self.write_lef_file(magleffile, magpath)
+                                                else:
+                                                    self.print('Did not find a file ' + magfile)
+                                                    # self.print('Warning: module ' + module + ' has no LEF or .mag views')
+                                                    pass
+                                            else:
+                                                self.print('Diagnostic: Found a LEF file for ' + module + ' in ' + magleffile)
+                                                leffile = magleffile
+                                    else:
+                                        self.print('Diagnostic: Found a LEF file for ' + module + ' in ' + leffile)
+
+                                    if os.path.exists(leffile):
+                                        if leffile in lefprocessed:
+                                            continue
+                                        else:
+                                            lefprocessed.append(leffile)
+
+                                        newcoredefs = self.read_lef_macros(magpath, lefname, 'celllib')
+                                        # The LEF file generated on-the-fly is not needed
+                                        # any more after parsing the macro(s).
+                                        # if istemp:
+                                        #     os.remove(leffile)
+                                        coredefs.extend(newcoredefs)
+                                        corecells.extend(list(item['name'] for item in newcoredefs))
+                                    else:
+                                        # self.print('Failed to find a LEF view for module ' + module)
+                                        pass
+
+                    elif vlogparse[0] in verilogcells:
+                        # Check for array of pads
+                        bushigh = buslow = -1
+                        if len(vlogparse) >= 3:
+                            bmatch = busrex.match(vlogline)
+                            if bmatch:
+                                bushigh = int(bmatch.group(1))
+                                buslow = int(bmatch.group(2))
+                                
+                        for i in range(buslow, bushigh + 1):
+                            newpad = {}
+                            if i >= 0:
+                                newpad['name'] = vlogparse[1] + '[' + str(i) + ']'
+                            else:
+                                newpad['name'] = vlogparse[1]
+                            newpad['cell'] = vlogparse[0]
+                            padcell = next(item for item in celldefs if item['name'] == vlogparse[0])
+                            newpad['iolib'] = padcell['iolib']
+                            newpad['class'] = padcell['class']
+                            newpad['subclass'] = padcell['subclass']
+                            newpad['width'] = padcell['width']
+                            newpad['height'] = padcell['height']
+                            newpadlist.append(newpad)
+
+                    elif vlogparse[0] in corecells:
+                        # Check for array of cells
+                        bushigh = buslow = -1
+                        if len(vlogparse) >= 3:
+                            bmatch = busrex.match(vlogline)
+                            if bmatch:
+                                bushigh = int(bmatch.group(1))
+                                buslow = int(bmatch.group(2))
+                                
+                        for i in range(buslow, bushigh + 1):
+                            newcorecell = {}
+                            if i >= 0:
+                                newcorecell['name'] = vlogparse[1] + '[' + str(i) + ']'
+                            else:
+                                newcorecell['name'] = vlogparse[1]
+                            newcorecell['cell'] = vlogparse[0]
+                            corecell = next(item for item in coredefs if item['name'] == vlogparse[0])
+                            newcorecell['celllib'] = corecell['celllib']
+                            newcorecell['class'] = corecell['class']
+                            newcorecell['subclass'] = corecell['subclass']
+                            newcorecell['width'] = corecell['width']
+                            newcorecell['height'] = corecell['height']
+                            corecelllist.append(newcorecell)
+
+        self.print('')
+        self.print('Source file information:')
+        self.print('Source filename: ' + vlogfile)
+        self.print('Number of I/O libraries is ' + str(len(ioleflibs)))
+        self.print('Number of library cells in I/O libraries used: ' + str(len(verilogcells)))
+        self.print('Number of core celldefs is ' + str(len(coredefs)))
+        self.print('')
+        self.print('Number of I/O cells in design: ' + str(len(newpadlist)))
+        self.print('Number of core cells in design: ' + str(len(corecelllist)))
+        self.print('')
+
+        # Save the results
+        self.celldefs = celldefs
+        self.coredefs = coredefs
+        self.vlogpads = newpadlist
+        self.corecells = corecelllist
+        self.ioleflibs = ioleflibs
+
+    # Check self.vlogpads, which was created during import (above) against
+    # self.(N,S,W,E)pads, which was read from the DEF file (if there was one)
+    # Also check self.corecells, which was created during import against
+    # self.coregroup, which was read from the DEF file.
+
+    def resolve(self):
+        self.print('Resolve differences in verilog and LEF views.')
+
+        samepads = []
+        addedpads = []
+        removedpads = []
+
+        # (1) Create list of entries that are in both self.vlogpads and self.()pads
+        # (2) Create list of entries that are in self.vlogpads but not in self.()pads
+
+        allpads = self.Npads + self.NEpad + self.Epads + self.SEpad + self.Spads + self.SWpad + self.Wpads + self.NWpad
+
+        for pad in self.vlogpads:
+            newpadname = pad['name']
+            try:
+                lpad = next(item for item in allpads if item['name'] == newpadname) 
+            except:
+                addedpads.append(pad)
+            else:
+                samepads.append(lpad)
+
+        # (3) Create list of entries that are in allpads but not in self.vlogpads
+        for pad in allpads:
+            newpadname = pad['name']
+            try:
+                lpad = next(item for item in self.vlogpads if item['name'] == newpadname) 
+            except:
+                removedpads.append(pad)
+
+        # Print results
+        if len(addedpads) > 0:
+            self.print('Added pads:')
+            for pad in addedpads:
+                self.print(pad['name'] + ' (' + pad['cell'] + ')')
+
+        if len(removedpads) > 0:
+            plist = []
+            nspacers = 0
+            for pad in removedpads:
+                if 'subclass' in pad:
+                    if pad['subclass'] != 'SPACER':
+                        plist.append(pad)
+                    else:
+                        nspacers += 1
+
+            if nspacers > 0:
+                self.print(str(nspacers) + ' spacer cells ignored.')
+            if len(plist) > 0:
+                self.print('Removed pads:')
+                for pad in removedpads:
+                    self.print(pad['name'] + ' (' + pad['cell'] + ')')
+
+        if len(addedpads) + len(removedpads) == 0:
+            self.print('Pad list has not changed.')
+
+        # Remove all cells from the "removed" list, with comment
+
+        allpads = [self.Npads, self.NEpad, self.Epads, self.SEpad, self.Spads, self.SWpad, self.Wpads, self.NWpad]
+
+        for pad in removedpads:
+            rname = pad['name']
+            for row in allpads:
+                try:
+                    rpad = next(item for item in row if item['name'] == rname)
+                except:
+                    rpad = None
+                else:
+                    row.remove(rpad)
+
+        # Now the verilog file has no placement information, so the old padlist
+        # entries (if they exist) are preferred.  Add to these the new padlist
+        # entries
+
+        # First pass for unassigned pads:  Use of "CLASS ENDCAP" is preferred
+        # for identifying corner pads.  Otherwise, if 'CORNER' or 'corner' is
+        # in the pad name, then make sure there is one per row in the first
+        # position.  This is not foolproof and depends on the cell library
+        # using the text 'corner' in the name of the corner cell.  However,
+        # if the ad hoc methods fail, the user can still manually move the
+        # corner cells to the right place (to be done:  Identify if library
+        # uses ENDCAP designation for corner cells up front;  don't go
+        # looking for 'corner' text if the cells are easily identifiable by
+        # LEF class).
+
+        for pad in addedpads[:]:
+            iscorner = False
+            if 'class' in pad and pad['class'] == 'ENDCAP':
+                iscorner = True
+            elif 'CORNER' in pad['cell'].upper():
+                iscorner = True
+           
+            if iscorner:
+                if self.NWpad == []:
+                    self.NWpad.append(pad)
+                    pad['o'] = 'E'
+                    addedpads.remove(pad)
+                elif self.NEpad == []:
+                    self.NEpad.append(pad)
+                    pad['o'] = 'S'
+                    addedpads.remove(pad)
+                elif self.SEpad == []:
+                    self.SEpad.append(pad)
+                    pad['o'] = 'W'
+                    addedpads.remove(pad)
+                elif self.SWpad == []:
+                    self.SWpad.append(pad)
+                    pad['o'] = 'N'
+                    addedpads.remove(pad)
+
+        numN = len(self.Npads)
+        numS = len(self.Spads)
+        numE = len(self.Epads)
+        numW = len(self.Wpads)
+
+        minnum = min(numN, numS, numE, numW)
+        minnum = max(minnum, int(len(addedpads) / 4))
+
+        # Add pads in clockwise order.  Note that S and E pads are defined counterclockwise
+        for pad in addedpads:
+            if numN < minnum:
+                self.Npads.append(pad)
+                numN += 1
+                pad['o'] = 'S'
+                self.print("Adding pad " + pad['name'] + " to Npads")
+            elif numE < minnum:
+                self.Epads.insert(0, pad)
+                numE += 1
+                pad['o'] = 'W'
+                self.print("Adding pad " + pad['name'] + " to Epads")
+            elif numS < minnum:
+                self.Spads.insert(0, pad)
+                numS += 1
+                pad['o'] = 'N'
+                self.print("Adding pad " + pad['name'] + " to Spads")
+            # elif numW < minnum:
+            else:
+                self.Wpads.append(pad)
+                numW += 1
+                pad['o'] = 'E'
+                self.print("Adding pad " + pad['name'] + " to Wpads")
+
+            minnum = min(numN, numS, numE, numW)
+            minnum = max(minnum, int(len(addedpads) / 4))
+
+        # Make sure all pads have included information from the cell definition
+
+        allpads = self.Npads + self.NEpad + self.Epads + self.SEpad + self.Spads + self.SWpad + self.Wpads + self.NWpad
+
+        for pad in allpads:
+            if 'width' not in pad:
+                try:
+                    celldef = next(item for item in celldefs if item['name'] == pad['cell'])
+                except:
+                    self.print('Cell ' + pad['cell'] + ' not found!')
+                else:
+                    pad['width'] = celldef['width']
+                    pad['height'] = celldef['height']
+                    pad['class'] = celldef['class']
+                    pad['subclass'] = celldef['subclass']
+
+        # Now treat the core cells in the same way (resolve list parsed from verilog
+        # against the list parsed from DEF)	
+
+        # self.print('Diagnostic: ')
+        # self.print('self.corecells = ' + str(self.corecells))
+        # self.print('self.coregroup = ' + str(self.coregroup))
+
+        samecore = []
+        addedcore = []
+        removedcore = []
+
+        # (1) Create list of entries that are in both self.corecells and self.coregroup
+        # (2) Create list of entries that are in self.corecells but not in self.coregroup
+
+        for cell in self.corecells:
+            newcellname = cell['name']
+            try:
+                lcore = next(item for item in self.coregroup if item['name'] == newcellname) 
+            except:
+                addedcore.append(cell)
+            else:
+                samecore.append(lcore)
+
+        # (3) Create list of entries that are in self.coregroup but not in self.corecells
+        for cell in self.coregroup:
+            newcellname = cell['name']
+            try:
+                lcore = next(item for item in self.corecells if item['name'] == newcellname) 
+            except:
+                removedcore.append(cell)
+
+        # Print results
+        if len(addedcore) > 0:
+            self.print('Added core cells:')
+            for cell in addedcore:
+                self.print(cell['name'] + ' (' + cell['cell'] + ')')
+
+        if len(removedcore) > 0:
+            clist = []
+            for cell in removedcore:
+                clist.append(cell)
+
+            if len(clist) > 0:
+                self.print('Removed core cells:')
+                for cell in removedcore:
+                    self.print(cell['name'] + ' (' + cell['cell'] + ')')
+
+        if len(addedcore) + len(removedcore) == 0:
+            self.print('Core cell list has not changed.')
+
+        # Remove all cells from the "removed" list
+
+        coregroup = self.coregroup
+        for cell in removedcore:
+            rname = cell['name']
+            try:
+                rcell = next(item for item in coregroup if item['name'] == rname)
+            except:
+                rcell = None
+            else:
+                coregroup.remove(rcell)
+
+        # Add all cells from the "added" list to coregroup
+
+        for cell in addedcore:
+            rname = cell['name']
+            try:
+                rcell = next(item for item in coregroup if item['name'] == rname)
+            except:
+                coregroup.append(cell)
+                if not 'o' in cell:
+                    cell['o'] = 'N'
+                if not 'x' in cell:
+                    if len(self.Wpads) > 0:
+                        pad = self.Wpads[0]
+                        padx = pad['x'] if 'x' in pad else 0
+                        cell['x'] = padx + pad['height'] + self.margin
+                    else:
+                        cell['x'] = self.margin
+                if not 'y' in cell:
+                    if len(self.Spads) > 0:
+                        pad = self.Spads[0]
+                        pady = pad['y'] if 'y' in pad else 0
+                        cell['y'] = pady + pad['height'] + self.margin
+                    else:
+                        cell['y'] = self.margin
+            else:
+                rcell = None
+
+        # Make sure all core cells have included information from the cell definition
+
+        for cell in coregroup:
+            if 'width' not in cell:
+                try:
+                    coredef = next(item for item in coredefs if item['name'] == cell['cell'])
+                except:
+                    self.print('Cell ' + cell['cell'] + ' not found!')
+                else:
+                    cell['width'] = coredef['width']
+                    cell['height'] = coredef['height']
+                    cell['class'] = coredef['class']
+                    cell['subclass'] = coredef['subclass']
+
+    # Generate a new padframe by writing the configuration file, running
+    # padring, reading back the DEF file, and (re)poplulating the workspace
+
+    def generate(self, level):
+        self.print('Generate legal padframe using padring')
+
+        # Write out the configuration file
+        self.writeconfig()
+        # Run the padring app
+        self.runpadring()
+        # Rotate pads in the output if pad orientations are different from
+        # padring's expectations
+        self.rotate_pads_in_def()
+        # Read the placement information back from the generated DEF file
+        self.readplacement()
+        # Resolve differences (e.g., remove spacers)
+        self.resolve()
+        # Recreate and draw the padframe view on the canvas
+        self.populate(level + 1)
+        self.frame_configure(None)
+
+    # Write a new configuration file
+
+    def writeconfig(self):
+        mag_path = self.projectpath + '/mag'
+        if not os.path.exists(mag_path):
+            self.print('Error:  No project path /mag directory exists.  Cannot write config file.')
+            return
+
+        self.print('Writing padring configuration file.')
+
+        # Determine cell width and height from pad sizes.
+        # NOTE:  This compresses the chip to the minimum dimensions
+        # allowed by the arrangement of pads.  Use a "core" block to
+        # force the area larger than minimum (not yet implemented)
+        
+        topwidth = 0
+        for pad in self.Npads:
+            if 'width' not in pad:
+                self.print('No width: pad = ' + str(pad))
+            topwidth += pad['width']
+
+        # Add in the corner cells
+        if self.NWpad != []:
+            topwidth += self.NWpad[0]['height']
+        if self.NEpad != []:
+            topwidth += self.NEpad[0]['width']
+
+        botwidth = 0
+        for pad in self.Spads:
+            botwidth += pad['width']
+
+        # Add in the corner cells
+        if self.SWpad != []:
+            botwidth += self.SWpad[0]['width']
+        if self.SEpad != []:
+            botwidth += self.SEpad[0]['height']
+
+        width = max(botwidth, topwidth)
+
+        # if width < self.urx - self.llx:
+        #     width = self.urx - self.llx
+
+        leftheight = 0
+        for pad in self.Wpads:
+            leftheight += pad['width']
+
+        # Add in the corner cells
+        if self.NWpad != []:
+            leftheight += self.NWpad[0]['height']
+        if self.SWpad != []:
+            leftheight += self.SWpad[0]['width']
+
+        rightheight = 0
+        for pad in self.Epads:
+            rightheight += pad['width']
+
+        # Add in the corner cells
+        if self.NEpad != []:
+            rightheight += self.NEpad[0]['width']
+        if self.SEpad != []:
+            rightheight += self.SEpad[0]['height']
+
+        height = max(leftheight, rightheight)
+
+        # Check the dimensions of the core cells.  If they exceed the available
+        # padframe area, then expand the padframe to accomodate the core.
+
+        corellx = coreurx = (self.llx + self.urx) / 2
+        corelly = coreury = (self.lly + self.ury) / 2
+
+        for corecell in self.coregroup:
+            corient = corecell['o']
+            if 'S' in corient or 'N' in corient:
+                cwidth = corecell['width']
+                cheight = corecell['height']
+            else:
+                cwidth = corecell['height']
+                cheight = corecell['width']
+
+            if corecell['x'] < corellx:
+                corellx = corecell['x']
+            if corecell['x'] + cwidth > coreurx:
+                coreurx = corecell['x'] + cwidth
+            if corecell['y'] < corelly:
+                corelly = corecell['y']
+            if corecell['y'] + cheight > coreury:
+                coreury = corecell['y'] + cheight
+
+        coreheight = coreury - corelly
+        corewidth = coreurx - corellx
+
+        # Ignoring the possibility of overlaps with nonstandard-sized pads,
+        # assuming that the user has visually separated them.  Only check
+        # the core bounds against the standard padframe inside edge.
+
+        if self.SWpad != [] and self.SEpad != []:
+            if corewidth > width - self.SWpad[0]['width'] - self.SEpad[0]['width']:
+                width = corewidth + self.SWpad[0]['width'] + self.SEpad[0]['width']
+        if self.NWpad != [] and self.SWpad != []:
+            if coreheight > height - self.NWpad[0]['height'] - self.SWpad[0]['height']:
+                height = coreheight + self.NWpad[0]['height'] + self.SWpad[0]['height']
+
+        # Core cells are given a margin of self.margin from the pad inside edge, so the
+        # core area passed to the padring app is 2 * self.margin larger than the
+        # measured size of the core area.
+        width += 2 * self.margin
+        height += 2 * self.margin
+
+        if self.keep_cfg == False or not os.path.exists(mag_path + '/padframe.cfg'):
+
+            if os.path.exists(mag_path + '/padframe.cfg'):
+                # Copy the previous padframe.cfg file to a backup.  In case something
+                # goes badly wrong, this should be the only file overwritten, and can
+                # be recovered from the backup.
+                shutil.copy(mag_path + '/padframe.cfg', mag_path + '/padframe.cfg.bak')
+
+            with open(mag_path + '/padframe.cfg', 'w') as ofile:
+                print('AREA ' + str(int(width)) + ' ' + str(int(height)) + ' ;',
+			file=ofile)
+                print('', file=ofile)
+                for pad in self.NEpad:
+                    print('CORNER ' + pad['name'] + ' SW ' + pad['cell'] + ' ;',
+			    file=ofile)
+                for pad in self.SEpad:
+                    print('CORNER ' + pad['name'] + ' NW ' + pad['cell'] + ' ;',
+			    file=ofile)
+                for pad in self.SWpad:
+                    print('CORNER ' + pad['name'] + ' NE ' + pad['cell'] + ' ;',
+			    file=ofile)
+                for pad in self.NWpad:
+                    print('CORNER ' + pad['name'] + ' SE ' + pad['cell'] + ' ;',
+			    file=ofile)
+                for pad in self.Npads:
+                    flip = 'F ' if 'F' in pad['o'] else ''
+                    print('PAD ' + pad['name'] + ' N ' + flip + pad['cell'] + ' ;',
+			    file=ofile)
+                for pad in self.Epads:
+                    flip = 'F ' if 'F' in pad['o'] else ''
+                    print('PAD ' + pad['name'] + ' E ' + flip + pad['cell'] + ' ;',
+			    file=ofile)
+                for pad in self.Spads:
+                    flip = 'F ' if 'F' in pad['o'] else ''
+                    print('PAD ' + pad['name'] + ' S ' + flip + pad['cell'] + ' ;',
+			    file=ofile)
+                for pad in self.Wpads:
+                    flip = 'F ' if 'F' in pad['o'] else ''
+                    print('PAD ' + pad['name'] + ' W ' + flip + pad['cell'] + ' ;',
+			    file=ofile)
+
+    # Run the padring app.
+
+    def runpadring(self):
+        mag_path = self.projectpath + '/mag'
+        if not os.path.exists(mag_path):
+            self.print('No path /mag exists in project space;  cannot run padring.')
+            return
+
+        self.print('Running padring')
+
+        if self.padring_path:
+            padringopts = [self.padring_path]
+        else:
+            padringopts = ['padring']
+
+        # Diagnostic
+        # self.print('Used libraries (self.ioleflibs) = ' + str(self.ioleflibs))
+
+        for iolib in self.ioleflibs:
+            padringopts.append('-L')
+            padringopts.append(iolib)
+        padringopts.append('--def')
+        padringopts.append('padframe.def')
+        padringopts.append('padframe.cfg')
+
+        self.print('Running ' + str(padringopts))
+   
+        p = subprocess.Popen(padringopts, stdout = subprocess.PIPE,
+		    stderr = subprocess.PIPE, cwd = mag_path)
+        self.watch(p)
+
+    # Read placement information from the DEF file generated by padring.
+
+    def readplacement(self, precheck=False):
+        self.print('Reading placement information from DEF file')
+
+        mag_path = self.projectpath + '/mag'
+        if not os.path.isfile(mag_path + '/padframe.def'):
+            if not precheck:
+                self.print('No file padframe.def:  pad frame was not generated.')
+            return False 
+
+        # Very simple DEF file parsing.  The placement DEF only contains a
+        # COMPONENTS section.  Certain assumptions are made about the syntax
+        # that depends on the way 'padring' writes its output.  This is not
+        # a rigorous DEF parser!
+
+        units = 1000
+        in_components = False
+        Npadlist = []
+        Spadlist = []
+        Epadlist = []
+        Wpadlist = []
+        NEpad = []
+        NWpad = []
+        SEpad = []
+        SWpad = []
+        coregroup = []
+
+        # Reset bounds
+        self.llx = self.lly = self.urx = self.ury = 0
+        corners = 0
+
+        with open(mag_path + '/padframe.def', 'r') as ifile:
+            deflines = ifile.read().splitlines()
+            for line in deflines:
+                if 'UNITS DISTANCE MICRONS' in line:
+                    units = line.split()[3]
+                elif in_components:
+                    lparse = line.split()
+                    if lparse[0] == '-':
+                        instname = lparse[1]
+                        cellname = lparse[2]
+                        
+                    elif lparse[0] == '+':
+                        if lparse[1] == 'PLACED':
+                            placex = lparse[3]
+                            placey = lparse[4]
+                            placeo = lparse[6]
+
+                            newpad = {}
+                            newpad['name'] = instname
+                            newpad['cell'] = cellname
+
+                            try:
+                                celldef = next(item for item in self.celldefs if item['name'] == cellname)
+                            except:
+                                celldef = None
+                            else:
+                                newpad['iolib'] = celldef['iolib']
+                                newpad['width'] = celldef['width']
+                                newpad['height'] = celldef['height']
+                                newpad['class'] = celldef['class']
+                                newpad['subclass'] = celldef['subclass']
+ 
+                            newpad['x'] = float(placex) / float(units)
+                            newpad['y'] = float(placey) / float(units)
+                            newpad['o'] = placeo
+
+                            # Adjust bounds
+                            if celldef:
+                                if newpad['x'] < self.llx:
+                                    self.llx = newpad['x']
+                                if newpad['y'] < self.lly:
+                                    self.lly = newpad['y']
+
+                                if newpad['o'] == 'N' or newpad['o'] == 'S':
+                                    padurx = newpad['x'] + celldef['width']
+                                    padury = newpad['y'] + celldef['height']
+                                else:
+                                    padurx = newpad['x'] + celldef['height']
+                                    padury = newpad['y'] + celldef['width']
+
+                                if padurx > self.urx:
+                                    self.urx = padurx
+                                if padury > self.ury:
+                                    self.ury = padury
+
+                            # First four entries in the DEF file are corners
+                            # padring puts the lower left corner at zero, so
+                            # use the zero coordinates to determine which pads
+                            # are which.  Note that padring assumes the corner
+                            # pad is drawn in the SW corner position!
+
+                            if corners < 4:
+                                if newpad['x'] == 0 and newpad['y'] == 0:
+                                    SWpad.append(newpad)
+                                elif newpad['x'] == 0:
+                                    NWpad.append(newpad)
+                                elif newpad['y'] == 0:
+                                    SEpad.append(newpad)
+                                else:
+                                    NEpad.append(newpad)
+                                corners += 1       
+                            else:
+                                # Place according to orientation.  If orientation
+                                # is not standard, be sure to make it standard!
+                                placeo = self.rotate_orientation(placeo)
+                                if placeo == 'N':
+                                    Spadlist.append(newpad)
+                                elif placeo == 'E':
+                                    Wpadlist.append(newpad)
+                                elif placeo == 'S':
+                                    Npadlist.append(newpad)
+                                else:
+                                    Epadlist.append(newpad)
+
+                    elif 'END COMPONENTS' in line:
+                        in_components = False
+                elif 'COMPONENTS' in line:
+                    in_components = True
+
+            self.Npads = Npadlist
+            self.Wpads = Wpadlist
+            self.Spads = Spadlist
+            self.Epads = Epadlist
+
+            self.NWpad = NWpad
+            self.NEpad = NEpad
+            self.SWpad = SWpad
+            self.SEpad = SEpad
+
+        # The padframe has its own DEF file from the padring app, but the core
+        # does not.  The core needs to be floorplanned in a very similar manner.
+        # This will be done by searching for a DEF file of the project top-level
+        # layout.  If none exists, it is created by generating it from the layout.
+        # If the top-level layout does not exist, then all core cells are placed
+        # at the origin, and the origin placed at the padframe inside corner.
+
+        mag_path = self.projectpath + '/mag'
+        if not os.path.isfile(mag_path + '/' + self.project + '.def'):
+            if os.path.isfile(mag_path + '/' + self.project + '.mag'):
+
+                # Create a DEF file from the layout
+                with open(mag_path + '/pfg_write_def.tcl', 'w') as ofile:
+                    print('drc off', file=ofile)
+                    print('box 0 0 0 0', file=ofile)
+                    print('load ' + self.project, file=ofile)
+                    print('def write', file=ofile)
+                    print('quit', file=ofile)
+
+                magicexec = self.magic_path if self.magic_path else 'magic'
+                mproc = subprocess.Popen([magicexec, '-dnull', '-noconsole',
+			'pfg_write_def.tcl'],
+			stdin = subprocess.PIPE, stdout = subprocess.PIPE,
+			stderr = subprocess.PIPE, cwd = mag_path, universal_newlines = True)
+
+                self.watch(mproc)
+                os.remove(mag_path + '/pfg_write_def.tcl')
+
+            elif not os.path.isfile(mag_path + '/core.def'):
+
+                # With no other information available, copy the corecells
+                # (from the verilog file) into the coregroup list.
+                # Position all core cells starting at the padframe top left
+                # inside corner, and arranging in rows without overlapping.
+                # Note that no attempt is made to organize the cells or
+                # otherwise produce an efficient layout.  Any dimension larger
+                # than the current padframe overruns to the right or bottom.
+
+                if self.SWpad != []:
+                    corellx = SWpad[0]['x'] + SWpad[0]['width'] + self.margin
+                    corelly = SWpad[0]['y'] + SWpad[0]['height'] + self.margin
+                else:
+                    corellx = Wpadlist[0]['x'] + Wpadlist[0]['height'] + self.margin
+                    corelly = Spadlist[0]['x'] + Spadlist[0]['height'] + self.margin
+                if self.NEpad != []:
+                    coreurx = NEpad[0]['x'] - self.margin
+                    coreury = NEpad[0]['y'] - self.margin
+                else:
+                    coreurx = Epadlist[0]['x'] - self.margin
+                    coreury = Npadlist[0]['x'] - self.margin
+                locllx = corellx
+                testllx = corellx
+                loclly = corelly
+                testlly = corelly
+                nextlly = corelly
+              
+                for cell in self.corecells:
+
+                    testllx = locllx + cell['width']
+                    if testllx > coreurx:
+                        locllx = corellx
+                        corelly = nextlly
+                        loclly = nextlly
+
+                    newcore = cell
+                    newcore['x'] = locllx
+                    newcore['y'] = loclly
+                    newcore['o'] = 'N'
+
+                    locllx += cell['width'] + self.margin
+
+                    testlly = corelly + cell['height'] + self.margin
+                    if testlly > nextlly:
+                        nextlly = testlly
+
+                    coregroup.append(newcore)
+
+                self.coregroup = coregroup
+
+        if os.path.isfile(mag_path + '/' + self.project + '.def'):
+            # Read the top-level DEF, and use it to position the core cells.
+            self.print('Reading the top-level cell DEF for core cell placement.')
+
+            units = 1000
+            in_components = False
+            with open(mag_path + '/' + self.project + '.def', 'r') as ifile:
+                deflines = ifile.read().splitlines()
+                for line in deflines:
+                    if 'UNITS DISTANCE MICRONS' in line:
+                        units = line.split()[3]
+                    elif in_components:
+                        lparse = line.split()
+                        if lparse[0] == '-':
+                            instname = lparse[1]
+                            # NOTE: Magic should not drop the entire path to the
+                            # cell for the cellname;  this needs to be fixed!  To
+                            # work around it, remove any path components.
+                            cellpath = lparse[2]
+                            cellname = os.path.split(cellpath)[1]
+                        
+                        elif lparse[0] == '+':
+                            if lparse[1] == 'PLACED':
+                                placex = lparse[3]
+                                placey = lparse[4]
+                                placeo = lparse[6]
+
+                                newcore = {}
+                                newcore['name'] = instname
+                                newcore['cell'] = cellname
+
+                                try:
+                                    celldef = next(item for item in self.coredefs if item['name'] == cellname)
+                                except:
+                                    celldef = None
+                                else:
+                                    newcore['celllib'] = celldef['celllib']
+                                    newcore['width'] = celldef['width']
+                                    newcore['height'] = celldef['height']
+                                    newcore['class'] = celldef['class']
+                                    newcore['subclass'] = celldef['subclass']
+ 
+                                newcore['x'] = float(placex) / float(units)
+                                newcore['y'] = float(placey) / float(units)
+                                newcore['o'] = placeo
+                                coregroup.append(newcore)
+
+                        elif 'END COMPONENTS' in line:
+                            in_components = False
+                    elif 'COMPONENTS' in line:
+                        in_components = True
+
+            self.coregroup = coregroup
+
+        elif os.path.isfile(mag_path + '/core.def'):
+            # No DEF or .mag file, so fallback position is the last core.def
+            # file generated by this script.
+            self.read_core_def(precheck=precheck)
+
+        return True
+
+    # Read placement information from the "padframe.def" file and rotate
+    # all cells according to self.pad_rotation.  This accounts for the
+    # problem that the default orientation of pads is arbitrarily defined
+    # by the foundry, while padring assumes that the corner pad is drawn
+    # in the lower-left position and other pads are drawn with the pad at
+    # the bottom and the buses at the top.
+
+    def rotate_pads_in_def(self):
+        if self.pad_rotation == 0:
+            return
+
+        self.print('Rotating pads in padframe DEF file.')
+        mag_path = self.projectpath + '/mag'
+
+        if not os.path.isfile(mag_path + '/padframe.def'):
+            self.print('No file padframe.def:  Cannot modify pad rotations.')
+            return
+
+        deflines = []
+        with open(mag_path + '/padframe.def', 'r') as ifile:
+            deflines = ifile.read().splitlines()
+
+        outlines = []
+        in_components = False
+        for line in deflines:
+            if in_components:
+                lparse = line.split()
+                if lparse[0] == '+':
+                    if lparse[1] == 'PLACED':
+                        neworient = self.rotate_orientation(lparse[6])
+                        lparse[6] = neworient
+                        line = ' '.join(lparse)
+
+                elif 'END COMPONENTS' in line:
+                    in_components = False
+            elif 'COMPONENTS' in line:
+                in_components = True
+            outlines.append(line)
+
+        with open(mag_path + '/padframe.def', 'w') as ofile:
+            for line in outlines:
+                print(line, file=ofile)
+
+    # Read placement information from the DEF file for the core (created by
+    # a previous run of this script)
+
+    def read_core_def(self, precheck=False):
+        self.print('Reading placement information from core DEF file.')
+
+        mag_path = self.projectpath + '/mag'
+
+        if not os.path.isfile(mag_path + '/core.def'):
+            if not precheck:
+                self.print('No file core.def:  core placement was not generated.')
+            return False 
+
+        # Very simple DEF file parsing, similar to the padframe.def reading
+        # routine above.
+
+        units = 1000
+        in_components = False
+
+        coregroup = []
+
+        with open(mag_path + '/core.def', 'r') as ifile:
+            deflines = ifile.read().splitlines()
+            for line in deflines:
+                if 'UNITS DISTANCE MICRONS' in line:
+                    units = line.split()[3]
+                elif in_components:
+                    lparse = line.split()
+                    if lparse[0] == '-':
+                        instname = lparse[1]
+                        cellname = lparse[2]
+                        
+                    elif lparse[0] == '+':
+                        if lparse[1] == 'PLACED':
+                            placex = lparse[3]
+                            placey = lparse[4]
+                            placeo = lparse[6]
+
+                            newcore = {}
+                            newcore['name'] = instname
+                            newcore['cell'] = cellname
+
+                            try:
+                                celldef = next(item for item in self.coredefs if item['name'] == cellname)
+                            except:
+                                celldef = None
+                            else:
+                                newcore['celllib'] = celldef['celllib']
+                                newcore['width'] = celldef['width']
+                                newcore['height'] = celldef['height']
+                                newcore['class'] = celldef['class']
+                                newcore['subclass'] = celldef['subclass']
+ 
+                            newcore['x'] = float(placex) / float(units)
+                            newcore['y'] = float(placey) / float(units)
+                            newcore['o'] = placeo
+                            coregroup.append(newcore)
+
+                    elif 'END COMPONENTS' in line:
+                        in_components = False
+                elif 'COMPONENTS' in line:
+                    in_components = True
+
+            self.coregroup = coregroup
+
+        return True
+
+    # Save the layout to a Magic database file (to be completed)
+
+    def save(self):
+        self.print('Saving results in a magic layout database.')
+
+        # Generate a list of (unique) LEF libraries for all padframe and core cells
+        leflist = []
+        for pad in self.celldefs:
+            if pad['iolib'] not in leflist:
+                leflist.append(pad['iolib'])
+
+        for core in self.coredefs:
+            if core['celllib'] not in leflist:
+                leflist.append(core['celllib'])
+
+        # Run magic, and generate the padframe with a series of commands
+        mag_path = self.projectpath + '/mag'
+
+        with open(mag_path + '/pfg_write_mag.tcl', 'w') as ofile:
+            print('drc off', file=ofile)
+            print('box 0 0 0 0', file=ofile)
+            for leffile in leflist:
+                print('lef read ' + leffile, file=ofile)
+            print('def read padframe', file=ofile)
+            print('select top cell', file=ofile)
+            print('select area', file=ofile)
+            print('select save padframe', file=ofile)
+            print('delete', file=ofile)
+            print('def read core', file=ofile)
+            print('getcell padframe', file=ofile)
+            print('save ' + self.project, file=ofile)
+            print('writeall force ' + self.project, file=ofile)
+            print('quit', file=ofile)
+
+        magicexec = self.magic_path if self.magic_path else 'magic'
+        mproc = subprocess.Popen([magicexec, '-dnull', '-noconsole',
+			'pfg_write_mag.tcl'],
+			stdin = subprocess.PIPE, stdout = subprocess.PIPE,
+			stderr = subprocess.PIPE, cwd = mag_path, universal_newlines = True)
+        self.watch(mproc)
+        os.remove(mag_path + '/pfg_write_mag.tcl')
+        self.print('Done writing layout ' + self.project + '.mag')
+
+        # Write the core DEF file if it does not exist yet.
+        if not os.path.isfile(mag_path + '/core.def'):
+            self.write_core_def()
+
+if __name__ == '__main__':
+    faulthandler.register(signal.SIGUSR2)
+    options = []
+    arguments = []
+    for item in sys.argv[1:]:
+        if item.find('-', 0) == 0:
+            options.append(item)
+        else:
+            arguments.append(item)
+
+    if '-help' in options:
+        print(sys.argv[0] + ' [options]')
+        print('')
+        print('options:')
+        print('   -noc    Print output to terminal, not the gui window')
+        print('   -nog    No graphics, run in batch mode')
+        print('   -cfg    Use existing padframe.cfg, do not regenerate')
+        print('   -padring-path=<path>	path to padring executable')
+        print('   -magic-path=<path>	path to magic executable')
+        print('   -tech-path=<path>	path to tech root folder')
+        print('   -project-path=<path>	path to project root folder')
+        print('   -help   Print this usage information')
+        print('')
+        sys.exit(0)
+
+    root = tkinter.Tk()
+    do_gui = False if ('-nog' in options or '-nogui' in options) else True
+    app = SoCFloorplanner(root, do_gui)
+
+    # Allow option -noc to bypass the text-to-console redirection, so crash
+    # information doesn't disappear with the app.
+
+    app.use_console = False if ('-noc' in options or '-noconsole' in options) else True
+    if do_gui == False:
+        app.use_console = False
+
+    # efabless format can be specified on the command line, but note that it
+    # is otherwise auto-detected by checking for .config vs. .ef-config in
+    # the project space.
+
+    app.ef_format = True if '-ef_format' in options else False
+    app.keep_cfg = True if '-cfg' in options else False
+
+    app.padring_path = None
+    app.magic_path = None
+    app.techpath = None
+    app.projectpath = None
+
+    for option in options:
+        if option.split('=')[0] == '-padring-path':
+            app.padring_path = option.split('=')[1]
+        elif option.split('=')[0] == '-magic-path':
+            app.magic_path = option.split('=')[1]
+        elif option.split('=')[0] == '-tech-path':
+            app.techpath = option.split('=')[1]
+        elif option.split('=')[0] == '-project-path':
+            app.projectpath = option.split('=')[1]
+            app.projectpath = app.projectpath[:-1] if app.projectpath[-1] == '/' else app.projectpath
+
+    app.text_to_console()
+    app.init_padframe()
+    if app.do_gui:
+        root.mainloop()
+    else:
+        # Run 'save' in non-GUI mode
+        app.save()
+        sys.exit(0)
+
diff --git a/common/split_gds.py b/common/split_gds.py
new file mode 100755
index 0000000..a673c2f
--- /dev/null
+++ b/common/split_gds.py
@@ -0,0 +1,76 @@
+#!/bin/env python3
+# Script to read a GDS library and write into individual GDS files, one per cell
+
+import os
+import sys
+import subprocess
+
+def usage():
+    print('split_gds.py <path_to_gds_library> <magic_techfile> [<file_with_list_of_cells>]')
+
+if __name__ == '__main__':
+
+    if len(sys.argv) == 1:
+        print("No options given to split_gds.py.")
+        usage()
+        sys.exit(0)
+
+    optionlist = []
+    arguments = []
+
+    for option in sys.argv[1:]:
+        if option.find('-', 0) == 0:
+            optionlist.append(option)
+        else:
+            arguments.append(option)
+
+    if len(arguments) != 3:
+        print("Wrong number of arguments given to split_gds.py.")
+        usage()
+        sys.exit(0)
+
+    source = arguments[0]
+
+    techfile = arguments[1]
+
+    celllist = arguments[2]
+    if os.path.isfile(celllist):
+        with open(celllist, 'r') as ifile:
+            celllist = ifile.read().splitlines()
+
+    destdir = os.path.split(source)[0]
+    gdsfile = os.path.split(source)[1]
+
+    with open(destdir + '/split_gds.tcl', 'w') as ofile:
+        print('#!/bin/env wish', file=ofile)
+        print('drc off', file=ofile)
+        print('gds readonly true', file=ofile)
+        print('gds rescale false', file=ofile)
+        print('tech unlock *', file=ofile)
+        print('gds read ' + gdsfile, file=ofile)
+
+        for cell in celllist:
+            print('load ' + cell, file=ofile)
+            print('gds write ' + cell, file=ofile)
+
+        print('quit -noprompt', file=ofile)
+
+    mproc = subprocess.run(['magic', '-dnull', '-noconsole',
+		'-T', techfile,
+		destdir + '/split_gds.tcl'],
+		stdin = subprocess.DEVNULL,
+		stdout = subprocess.PIPE,
+		stderr = subprocess.PIPE, cwd = destdir,
+		universal_newlines = True)
+    if mproc.stdout:
+        for line in mproc.stdout.splitlines():
+            print(line)
+    if mproc.stderr:
+        print('Error message output from magic:')
+        for line in mproc.stderr.splitlines():
+            print(line)
+        if mproc.returncode != 0:
+            print('ERROR:  Magic exited with status ' + str(mproc.returncode))
+
+    os.remove(destdir + '/split_gds.tcl')
+    exit(0)
diff --git a/common/staging_install.py b/common/staging_install.py
new file mode 100755
index 0000000..3e13cb0
--- /dev/null
+++ b/common/staging_install.py
@@ -0,0 +1,617 @@
+#!/usr/bin/env python3
+#
+# staging_install.py
+#
+# This file copies the staging area created by foundry_install.py
+# into the target directory area, changing paths to match the target,
+# and creating symbolic links where requested and allowed.
+#
+# Options:
+#    -link_from <type>	Make symbolic links to vendor files from target
+#			Types are: "none", "source", or a PDK name.
+#			Default "none" (copy all files from source)
+#    -ef_format		Use efabless naming (libs.ref/techLEF),
+#			otherwise use generic naming (libs.tech/lef)
+#
+#    -staging <path>	Path to staging top level directory
+#    -target <path>	Path to target top level directory
+#    -local <path>	For distributed installs, this is the local
+#			path to target top level directory.
+#    -source <path>     Path to original source top level directory,
+#                       if link_from is "source".  This option may
+#                       be called multiple times if there are multiple
+#                       sources.
+
+import re
+import os
+import sys
+import glob
+import stat
+import shutil
+import filecmp
+import subprocess
+
+# NOTE:  This version of copy_tree from distutils works like shutil.copytree()
+# in Python 3.8 and up ONLY using "dirs_exist_ok=True".
+from distutils.dir_util import copy_tree
+
+def usage():
+    print("staging_install.py [options...]")
+    print("   -link_from <name> Make symbolic links from target to <name>")
+    print("                     where <name> can be 'source' or a PDK name.")
+    print("                     Default behavior is to copy all files.")
+    print("   -copy             Copy files from source to target (default)")
+    print("   -ef_format        Use efabless naming conventions for local directories")
+    print("")
+    print("   -staging <path>   Path to top of staging directory tree")
+    print("   -target <path>    Path to top of target directory tree")
+    print("   -local <path>	Local path to top of target directory tree for distributed install")
+    print("")
+    print(" If <target> is unspecified then <name> is used for the target.")
+
+def makeuserwritable(filepath):
+    if os.path.exists(filepath):
+        st = os.stat(filepath)
+        os.chmod(filepath, st.st_mode | stat.S_IWUSR)
+
+# Filter files to replace all strings matching "stagingdir" with "localdir" for
+# every file in "tooldir".  If "tooldir" contains subdirectories, then recursively
+# apply the replacement filter to all files in the subdirectories.  Do not follow
+# symbolic links.
+
+def filter_recursive(tooldir, stagingdir, localdir):
+    gdstypes = ['.gds', '.gds2', '.gdsii']
+
+    if not os.path.exists(tooldir):
+        return 0
+    elif os.path.islink(tooldir):
+        return 0
+
+    toolfiles = os.listdir(tooldir)
+    total = 0
+
+    for file in toolfiles:
+        # Do not attempt to do text substitutions on a binary file!
+        if os.path.splitext(file)[1] in gdstypes:
+            continue
+
+        filepath = tooldir + '/' + file
+        if os.path.islink(filepath):
+            continue
+        elif os.path.isdir(filepath):
+            total += filter_recursive(filepath, stagingdir, localdir)
+        else:
+            with open(filepath, 'r') as ifile:
+                try:
+                    flines = ifile.read().splitlines()
+                except UnicodeDecodeError:
+                    print('Failure to read file ' + filepath + '; non-ASCII content.')
+                    continue
+
+            # Make sure this file is writable (as the original may not be)
+            makeuserwritable(filepath)
+
+            modified = False
+            with open(filepath, 'w') as ofile:
+                for line in flines:
+                    newline = line.replace(stagingdir, localdir)
+                    print(newline, file=ofile) 
+                    if newline != line:
+                        modified = True
+
+            if modified:
+                total += 1
+    return total
+        
+# To avoid problems with various library functions that copy hierarchical
+# directory trees, remove all the files from the target that are going to
+# be replaced by the contents of staging.  This avoids problems with
+# symbolic links and such.
+
+def remove_target(stagingdir, targetdir):
+
+    slist = os.listdir(stagingdir)
+    tlist = os.listdir(targetdir)
+
+    for sfile in slist:
+        if sfile in tlist:
+            tpath = targetdir + '/' + sfile
+            if os.path.islink(tpath):
+                os.unlink(tpath)
+            elif os.path.isdir(tpath):
+                remove_target(stagingdir + '/' + sfile, targetdir + '/' + sfile)
+            else:
+                os.remove(tpath)
+
+# Create a list of source files/directories from the contents of source.txt
+
+def make_source_list(sources):
+    sourcelist = []
+    for source in sources:
+        sourcelist.extend(glob.glob(source))
+    return sourcelist
+
+# Replace all files in list "libfiles" with symbolic links to files in
+# "sourcelist", where the files are found to be the same.  If the entry
+# in "libfiles" is a directory and the same directory is found in "sourcelist",
+# then repeat recursively on the subdirectory.
+#
+# Because the installation may be distributed, there may be a difference
+# between where the files to be linked to currently are (checklist)
+# and where they will eventually be located (sourcelist).
+
+def replace_with_symlinks(libfiles, sourcelist):
+    # List of files that never get installed
+    exclude = ['generate_magic.tcl', '.magicrc', 'sources.txt']
+    total = 0
+    for libfile in libfiles:
+        if os.path.islink(libfile):
+            continue
+        else:
+            try:
+                sourcefile = next(item for item in sourcelist if os.path.split(item)[1] == os.path.split(libfile)[1])
+            except:
+                pass
+            else:
+                if os.path.isdir(libfile):
+                    newlibfiles = glob.glob(libfile + '/*')
+                    newsourcelist = glob.glob(sourcefile + '/*')
+                    total += replace_with_symlinks(newlibfiles, newsourcelist)
+                elif filecmp.cmp(libfile, sourcefile):
+                    if not os.path.split(libfile)[1] in exclude:
+                        os.remove(libfile)
+                        # Use absolute path for the source file
+                        sourcepath = os.path.abspath(sourcefile)
+                        os.symlink(sourcepath, libfile)
+                        total += 1
+    return total
+
+# Similar to the routine above, replace files in "libdir" with symbolic
+# links to the files in "srclibdir", where the files are found to be the
+# same.  The difference from the routine above is that "srclibdir" is
+# another installed PDK, and so the directory hierarchy is expected to
+# match that of "libdir" exactly, so the process of finding matches is
+# a bit more straightforward.
+#
+# Because the installation may be distributed, there may be a difference
+# between where the files to be linked to currently are (checklibdir)
+# and where they will eventually be located (srclibdir).
+
+def replace_all_with_symlinks(libdir, srclibdir, checklibdir):
+    total = 0
+    try:
+        libfiles = os.listdir(libdir)
+    except FileNotFoundError:
+        print('Cannot list directory ' + libdir)
+        print('Called: replace_all_with_symlinks(' + libdir + ', ' + srclibdir + ', ' + checklibdir + ')')
+        return total
+
+    try:
+        checkfiles = os.listdir(checklibdir)
+    except FileNotFoundError:
+        print('Cannot list check directory ' + checklibdir)
+        print('Called: replace_all_with_symlinks(' + libdir + ', ' + srclibdir + ', ' + checklibdir + ')')
+        return total
+
+    for libfile in libfiles:
+        if libfile in checkfiles:
+            libpath = libdir + '/' + libfile
+            checkpath = checklibdir + '/' + libfile
+            srcpath = srclibdir + '/' + libfile
+
+            if os.path.isdir(libpath):
+                if os.path.isdir(checkpath):
+                    total += replace_all_with_symlinks(libpath, srcpath, checkpath)
+            else:
+                try:
+                    if filecmp.cmp(libpath, checkpath):
+                        os.remove(libpath)
+                        os.symlink(srcpath, libpath)
+                        total += 1
+                except FileNotFoundError:
+                    print('Failed file compare with libpath=' + libpath + ', checkpath=' + checkpath)
+
+    return total
+
+#----------------------------------------------------------------
+# This is the main entry point for the staging install script.
+#----------------------------------------------------------------
+
+if __name__ == '__main__':
+
+    if len(sys.argv) == 1:
+        print("No options given to staging_install.py.")
+        usage()
+        sys.exit(0)
+    
+    optionlist = []
+    newopt = []
+
+    stagingdir = None
+    targetdir = None
+    link_from = None
+    localdir = None
+
+    ef_format = False
+    do_install = True
+
+    # Break arguments into groups where the first word begins with "-".
+    # All following words not beginning with "-" are appended to the
+    # same list (optionlist).  Then each optionlist is processed.
+    # Note that the first entry in optionlist has the '-' removed.
+
+    for option in sys.argv[1:]:
+        if option.find('-', 0) == 0:
+            if newopt != []:
+                optionlist.append(newopt)
+                newopt = []
+            newopt.append(option[1:])
+        else:
+            newopt.append(option)
+
+    if newopt != []:
+        optionlist.append(newopt)
+
+    # Check for option "ef_format" or "std_format"
+    for option in optionlist[:]:
+        if option[0] == 'ef_naming' or option[0] == 'ef_names' or option[0] == 'ef_format':
+            optionlist.remove(option)
+            ef_format = True
+        elif option[0] == 'std_naming' or option[0] == 'std_names' or option[0] == 'std_format':
+            optionlist.remove(option)
+            ef_format = False
+        elif option[0] == 'uninstall':
+            optionlist.remove(option)
+            do_install = False
+
+    # Check for options "link_from", "staging", "target", and "local"
+
+    link_name = None
+    for option in optionlist[:]:
+        if option[0] == 'link_from':
+            optionlist.remove(option)
+            if option[1].lower() == 'none':
+                link_from = None
+            elif option[1].lower() == 'source':
+                link_from = 'source'
+            else:
+                link_from = option[1]
+                link_name = os.path.split(link_from)[1]
+        elif option[0] == 'staging' or option[0] == 'source':
+            optionlist.remove(option)
+            stagingdir = option[1]
+        elif option[0] == 'target':
+            optionlist.remove(option)
+            targetdir = option[1]
+        elif option[0] == 'local':
+            optionlist.remove(option)
+            localdir = option[1]
+
+    # Error if no staging or dest specified
+    if not stagingdir:
+        print("No staging directory specified.  Exiting.")
+        sys.exit(1)
+
+    if not targetdir:
+        print("No target directory specified.  Exiting.")
+        sys.exit(1)
+
+    # If localdir is not specified, then it is the same as the parent
+    # of the target (local installation assumed)
+    if not localdir:
+        localdir = targetdir
+
+    # Take the target PDK name from the target path last component
+    pdkname = os.path.split(targetdir)[1]
+
+    # If link source is a PDK name, if it has no path, then pull the
+    # path from the target name.
+
+    if link_from:
+        if link_from != 'source':
+            if link_from.find('/', 0) < 0:
+                link_name = link_from
+                link_from = os.path.split(localdir)[0] + '/' + link_name
+        else:
+            # If linking from source, convert the source path to an
+            # absolute pathname.
+            stagingdir = os.path.abspath(stagingdir)
+
+    # If link_from is the same as localdir, then set link_from to None
+    if link_from == localdir:
+        link_from = None
+
+    # checkdir is the DIST target directory for the PDK pointed
+    # to by link_name.  Files must be found there before creating
+    # symbolic links to the (not yet existing) final install location.
+
+    if link_name:
+        checkdir = os.path.split(targetdir)[0] + '/' + link_name
+    else:
+        checkdir = ''
+
+    # Diagnostic
+    if do_install:
+        print("Installing in target directory " + targetdir)
+    else:
+        print("Uninstalling from target directory " + targetdir)
+        print("(Method not yet implemented)")
+
+    # Create the top-level directories
+
+    os.makedirs(targetdir, exist_ok=True)
+    os.makedirs(targetdir + '/libs.tech', exist_ok=True)
+    os.makedirs(targetdir + '/libs.ref', exist_ok=True)
+    if os.path.isdir(stagingdir + '/libs.priv'):
+        os.makedirs(targetdir + '/libs.priv', exist_ok=True)
+        has_priv = True
+    else:
+        has_priv = False
+
+    # Path to magic techfile depends on ef_format
+
+    if ef_format == True:
+        mag_current = '/libs.tech/magic/current/'
+    else:
+        mag_current = '/libs.tech/magic/'
+
+    # First install everything by direct copy.  Keep the staging files
+    # as they will be used to reference the target area to know which
+    # files need to be checked and/or modified.
+
+    if not os.path.isdir(targetdir):
+        try:
+            os.makedirs(targetdir, exist_ok=True)
+        except:
+            print('Fatal error:  Cannot make target directory ' + targetdir + '!')
+            exit(1)
+
+    # Remove any files from the target directory that are going to be replaced
+    print('Removing files from target')
+    remove_target(stagingdir, targetdir)
+
+    print('Copying staging files to target')
+    # print('Diagnostic:  copy_tree ' + stagingdir + ' ' + targetdir)
+    copy_tree(stagingdir, targetdir, preserve_symlinks=True)
+    print('Done.')
+
+    # Magic and qflow setup files have references to the staging area that have
+    # been used by the vendor install;  these need to be changed to the target
+    # directory.
+
+    print('Changing local path references from ' + stagingdir + ' to ' + localdir)
+    print('Part 1:  Tools')
+
+    needcheck = ['ngspice']
+    techdirs = ['/libs.tech/']
+    if has_priv:
+        techdirs.append('/libs.priv/')
+
+    for techdir in techdirs:
+        tools = os.listdir(targetdir + techdir)
+        for tool in tools:
+            tooldir = targetdir + techdir + tool
+
+            # There are few enough tool setup files that they can just all be
+            # filtered directly.  This code only looks in the directory 'tooldir'.
+            # If there are files is subdirectories of 'tooldir' that require
+            # substitution, then this code needs to be revisited.
+
+            # Note that due to the low overhead of tool setup files, there is
+            # no attempt to check for possible symlinks to link_from if link_from
+            # is a base PDK.
+
+            total = filter_recursive(tooldir, stagingdir, localdir)
+            if total > 0:
+                substr = 'substitutions' if total > 1 else 'substitution'
+                print('      ' + tool + ' (' + str(total) + ' ' + substr + ')')
+
+    # If "link_from" is another PDK, then check all files against the files in
+    # the other PDK, and replace the file with a symbolic link if the file contents
+    # match (Note:  This is done only for ngspice model files;  other tool files are
+    # generally small and deemed unnecessary to make symbolic links).
+
+    if link_from != 'source':
+        thispdk = os.path.split(targetdir)[1]
+
+        # Only create links for PDKs other than the one we are making links to.
+        if thispdk != link_from:
+            print('Replacing files with symbolic links to ' + link_from + ' where possible.')
+            for techdir in techdirs:
+                for tool in needcheck:
+                    tooldir = targetdir + techdir + tool
+                    srctooldir = link_from + techdir + tool
+                    if checkdir != '':
+                        checktooldir = checkdir + techdir + tool
+                    else:
+                        checktooldir = srctooldir
+                    if os.path.exists(tooldir):
+                        total = replace_all_with_symlinks(tooldir, srctooldir, checktooldir)
+                        if total > 0:
+                            symstr = 'symlinks' if total > 1 else 'symlink'
+                            print('      ' + tool + ' (' + str(total) + ' ' + symstr + ')')
+
+    # In .mag files in mag/ and maglef/, also need to change the staging
+    # directory name to localdir
+
+    needcheck = ['mag', 'maglef']
+    refdirs = ['/libs.ref/']
+    if has_priv:
+        refdirs.append('/libs.priv/')
+
+    if ef_format:
+        print('Part 2:  Formats')
+        for refdir in refdirs:
+            for filetype in needcheck:
+                print('   ' + filetype)
+                filedir = targetdir + refdir + filetype
+                if os.path.isdir(filedir):
+                    libraries = os.listdir(filedir)
+                    for library in libraries:
+                        libdir = filedir + '/' + library
+                        total = filter_recursive(libdir, stagingdir, localdir)
+                        if total > 0:
+                            substr = 'substitutions' if total > 1 else 'substitution'
+                            print('      ' + library + ' (' + str(total) + ' ' + substr + ')')
+    else:
+        print('Part 2:  Libraries')
+        for refdir in refdirs:
+            libraries = os.listdir(targetdir + refdir)
+            for library in libraries:
+                print('   ' + library)
+                for filetype in needcheck:
+                    filedir = targetdir + refdir + library + '/' + filetype
+                    total = filter_recursive(filedir, stagingdir, localdir)
+                    if total > 0:
+                        substr = 'substitutions' if total > 1 else 'substitution'
+                        print('      ' + filetype + ' (' + str(total) + ' ' + substr + ')')
+        
+    # If "link_from" is "source", then check all files against the source
+    # directory, and replace the file with a symbolic link if the file
+    # contents match.  The "foundry_install.py" script should have added a
+    # file "sources.txt" with the name of the source directories for each
+    # install directory.
+
+    if link_from == 'source':
+        print('Replacing files with symbolic links to source where possible.')
+        for refdir in refdirs:
+            if ef_format:
+                filedirs = os.listdir(targetdir + refdir)
+                for filedir in filedirs:
+                    print('   ' + filedir)
+                    dirpath = targetdir + refdir + filedir
+                    if os.path.isdir(dirpath):
+                        libraries = os.listdir(dirpath)
+                        for library in libraries:
+                            libdir = targetdir + refdir + filedir + '/' + library
+                            libfiles = os.listdir(libdir)
+                            if 'sources.txt' in libfiles:
+                                libfiles = glob.glob(libdir + '/*')
+                                libfiles.remove(libdir + '/sources.txt')
+                                with open(libdir + '/sources.txt') as ifile:
+                                    sources = ifile.read().splitlines()
+                                sourcelist = make_source_list(sources)
+                                total = replace_with_symlinks(libfiles, sourcelist)
+                                if total > 0:
+                                    symstr = 'symlinks' if total > 1 else 'symlink'
+                                    print('      ' + library + ' (' + str(total) + ' ' + symstr + ')')
+            else:
+                libraries = os.listdir(targetdir + refdir)
+                for library in libraries:
+                    print('   ' + library)
+                    filedirs = os.listdir(targetdir + refdir + library)
+                    for filedir in filedirs:
+                        libdir = targetdir + refdir + library + '/' + filedir
+                        if os.path.isdir(libdir):
+                            libfiles = os.listdir(libdir)
+                            if 'sources.txt' in libfiles:
+                                # List again, but with full paths.
+                                libfiles = glob.glob(libdir + '/*')
+                                libfiles.remove(libdir + '/sources.txt')
+                                with open(libdir + '/sources.txt') as ifile:
+                                    sources = ifile.read().splitlines()
+                                sourcelist = make_source_list(sources)
+                                total = replace_with_symlinks(libfiles, sourcelist)
+                                if total > 0:
+                                    symstr = 'symlinks' if total > 1 else 'symlink'
+                                    print('      ' + filedir + ' (' + str(total) + ' ' + symstr + ')')
+
+    # Otherwise, if "link_from" is another PDK, then check all files against
+    # the files in the other PDK, and replace the file with a symbolic link
+    # if the file contents match.
+
+    elif link_from:
+        thispdk = os.path.split(targetdir)[1]
+
+        # Only create links for PDKs other than the one we are making links to.
+        if thispdk != link_from:
+
+            print('Replacing files with symbolic links to ' + link_from + ' where possible.')
+
+            for refdir in refdirs:
+                if ef_format:
+                    filedirs = os.listdir(targetdir + refdir)
+                    for filedir in filedirs:
+                        print('   ' + filedir)
+                        dirpath = targetdir + refdir + filedir
+                        if os.path.isdir(dirpath):
+                            libraries = os.listdir(dirpath)
+                            for library in libraries:
+                                libdir = targetdir + refdir + filedir + '/' + library
+                                srclibdir = link_from + refdir + filedir + '/' + library
+                                if checkdir != '':
+                                    checklibdir = checkdir + refdir + filedir + '/' + library
+                                else:
+                                    checklibdir = srclibdir
+                                if os.path.exists(libdir):
+                                    total = replace_all_with_symlinks(libdir, srclibdir, checklibdir)
+                                    if total > 0:
+                                        symstr = 'symlinks' if total > 1 else 'symlink'
+                                        print('      ' + library + ' (' + str(total) + ' ' + symstr + ')')
+                else:
+                    libraries = os.listdir(targetdir + refdir)
+                    for library in libraries:
+                        print('   ' + library)
+                        filedirs = os.listdir(targetdir + refdir + library)
+                        for filedir in filedirs:
+                            libdir = targetdir + refdir + library + '/' + filedir
+                            srclibdir = link_from + refdir + library + '/' + filedir
+                            if checkdir != '':
+                                checklibdir = checkdir + refdir + library + '/' + filedir
+                            else:
+                                checklibdir = srclibdir
+                            if os.path.exists(libdir):
+                                total = replace_all_with_symlinks(libdir, srclibdir, checklibdir)
+                                if total > 0:
+                                    symstr = 'symlinks' if total > 1 else 'symlink'
+                                    print('      ' + filedir + ' (' + str(total) + ' ' + symstr + ')')
+
+    # Remove temporary files:  Magic generation scripts, sources.txt
+    # file, and magic extract files.
+
+    print('Removing temporary files from destination.')
+
+    for refdir in refdirs:
+        if ef_format:
+            filedirs = os.listdir(targetdir + refdir)
+            for filedir in filedirs:
+                if os.path.islink(filedir):
+                    continue
+                elif os.path.isdir(filedir):
+                    libraries = os.listdir(targetdir + refdir + filedir)
+                    for library in libraries:
+                        libdir = targetdir + refdir + filedir + '/' + library
+                        libfiles = os.listdir(libdir)
+                        for libfile in libfiles:
+                            filepath = libdir + '/' + libfile
+                            if os.path.islink(filepath):
+                                continue
+                            elif libfile == 'sources.txt':
+                                os.remove(filepath)
+                            elif libfile == 'generate_magic.tcl':
+                                os.remove(filepath)
+                            elif os.path.splitext(libfile)[1] == '.ext':
+                                os.remove(filepath)
+        else:
+            libraries = os.listdir(targetdir + refdir)
+            for library in libraries:
+                filedirs = os.listdir(targetdir + refdir + library)
+                for filedir in filedirs:
+                    filepath = targetdir + refdir + library + '/' + filedir
+                    if os.path.islink(filepath):
+                        continue
+                    elif os.path.isdir(filepath):
+                        libfiles = os.listdir(filepath)
+                        for libfile in libfiles:
+                            libfilepath = filepath + '/' + libfile
+                            if os.path.islink(libfilepath):
+                                continue
+                            elif libfile == 'sources.txt':
+                                os.remove(libfilepath)
+                            elif libfile == 'generate_magic.tcl':
+                                os.remove(libfilepath)
+                            elif os.path.splitext(libfile)[1] == '.ext':
+                                os.remove(libfilepath)
+        
+    print('Done with PDK migration.')
+    sys.exit(0)
diff --git a/common/tksimpledialog.py b/common/tksimpledialog.py
new file mode 100755
index 0000000..4734291
--- /dev/null
+++ b/common/tksimpledialog.py
@@ -0,0 +1,86 @@
+#!/usr/bin/env python3
+#
+# Dialog class for tkinter
+
+import os
+import tkinter
+from tkinter import ttk
+
+class Dialog(tkinter.Toplevel):
+
+    def __init__(self, parent, message = None, title = None, seed = None, border = 'blue', **kwargs):
+
+        tkinter.Toplevel.__init__(self, parent)
+        self.transient(parent)
+
+        if title:
+            self.title(title)
+
+        self.configure(background=border, padx=2, pady=2)
+        self.obox = ttk.Frame(self)
+        self.obox.pack(side = 'left', fill = 'both', expand = 'true')
+
+        self.parent = parent
+        self.result = None
+        body = ttk.Frame(self.obox)
+        self.initial_focus = self.body(body, message, seed, **kwargs)
+        body.pack(padx = 5, pady = 5)
+        self.buttonbox()
+        self.grab_set()
+
+        if not self.initial_focus:
+            self.initial_focus = self
+
+        self.protocol("WM_DELETE_WINDOW", self.cancel)
+        self.geometry("+%d+%d" % (parent.winfo_rootx() + 50,
+                                  parent.winfo_rooty() + 50))
+
+        self.initial_focus.focus_set()
+        self.wait_window(self)
+
+    # Construction hooks
+
+    def body(self, master, **kwargs):
+        # Create dialog body.  Return widget that should have
+        # initial focus.  This method should be overridden
+        pass
+
+    def buttonbox(self):
+        # Add standard button box.  Override if you don't want the
+        # standard buttons
+
+        box = ttk.Frame(self.obox)
+
+        self.okb = ttk.Button(box, text="OK", width=10, command=self.ok, default='active')
+        self.okb.pack(side='left', padx=5, pady=5)
+        w = ttk.Button(box, text="Cancel", width=10, command=self.cancel)
+        w.pack(side='left', padx=5, pady=5)
+
+        self.bind("<Return>", self.ok)
+        self.bind("<Escape>", self.cancel)
+        box.pack(fill='x', expand='true')
+
+    # Standard button semantics
+
+    def ok(self, event=None):
+
+        if not self.validate():
+            self.initial_focus.focus_set() # put focus back
+            return
+
+        self.withdraw()
+        self.update_idletasks()
+        self.result = self.apply()
+        self.cancel()
+
+    def cancel(self, event=None):
+
+        # Put focus back to the parent window
+        self.parent.focus_set()
+        self.destroy()
+
+    def validate(self):
+        return 1 # Override this
+
+    def apply(self):
+        return None # Override this
diff --git a/sky130/Makefile b/sky130/Makefile
new file mode 100644
index 0000000..2673519
--- /dev/null
+++ b/sky130/Makefile
@@ -0,0 +1,397 @@
+# Makefile for efabless design kits for SkyWater Sky130:
+#
+#  sky130A      =  5-metal backend stack with dual MiM
+#
+# Written by Tim Edwards March 2019
+# efabless corporation
+# updated October 2019
+# updated December 2019 (divide installation sections for individual tools)
+# updated March 2020 (refactored the install process)
+# updated May 2020 (changed to new process name Sky130)
+#
+# Instructions:
+#
+# Modify values below as needed:
+#
+#	VENDOR_PATH: points to vendor sources
+#	EF_STYLE: 1 for efabless style, 0 otherwise
+#	LINK_TARGETS: link back to source or link to 1st PDK when possible
+#	DIST_PATH: install location for distributed install
+#	LOCAL_PATH: install location for local install or runtime location
+#		    for distributed install
+#
+# Run "make" to stage the PDK for tool setup and vendor libraries
+
+# If installing into the final destination (local install):
+#
+#   Run "make install-local" to install all staged files
+#   ("make install" is equivalent to "make install-local")
+#
+# If installing into a repository to be distributed to the final destination:
+#
+#   Run "make install-dist" to install all staged files
+#
+# Run "make clean" to remove all staging files.
+#
+# Run "make veryclean" to remove all staging and install log files.
+#
+# For the sake of simplicity, the "standard" local install can be done
+# with the usual
+#
+#   make
+#   make install
+#   make clean
+#
+#--------------------------------------------------------------------
+# This Makefile contains bash-isms
+SHELL = bash
+
+REVISION    = 20200508
+TECH        = sky130
+
+# If EF_STYLE is set to 1, then efabless naming conventions are
+# used, otherwise the generic naming conventions are used.
+# Mainly, the hierarchy of library names and file types is reversed
+# (e.g., sky130_fd_sc_hd/lef vs. lef/sky130_fd_sc_hd).
+
+EF_STYLE = 0
+# EF_STYLE = 1
+
+# Normally it's fine to keep the staging path in a local directory,
+# although /tmp or a dedicated staging area are also fine, as long
+# as the install process can write to the path.
+
+STAGING_PATH = `pwd`
+
+# If LINK_TARGETS is set to "none", then files are copied
+# from the SkyWater sources to the target.  If set to "source",
+# symbolic links are made in the target directories pointing
+# back to the SkyWater sources.  If set to the name of another
+# PDK (e.g, "sky130A"), then symbolic links are made to the
+# same files in that PDK, where they exist, and are copied
+# from source, where they don't.
+
+# LINK_TARGETS = source
+# LINK_TARGETS = none
+# LINK_TARGETS = sky130A
+LINK_TARGETS = source
+
+# Paths:
+
+# Path to skywater_pdk (to be changed to public repo;  work in progress)
+# Version below comes from foss-eda-tools.googlesource.com
+# SKYWATER_PATH = ~/gits/skywater-pdk-scratch/skywater-pdk/libraries
+# Version below is also from foss-eda-tools and is more recent than
+# the scratch repo above.
+SKYWATER_PATH = ~/gits/skywater-pdk/libraries
+
+# NOTE:  Install destination is the git repository of the technology platform.
+# Once updated in git, the git project can be distributed to all hosts.
+#
+ifeq (${EF_STYLE}, 1)
+    LOCAL_PATH = /ef/tech/SW
+    CONFIG_DIR = .ef-config
+    REV_DIR = ${REVISION}
+else
+    # LOCAL_PATH = /usr/local/share/vlsi/SkyWater
+    LOCAL_PATH = ~/projects/efabless/tech/SW
+    CONFIG_DIR = .config
+    REV_DIR = .
+endif
+
+DIST_PATH = ~/gits/ef-skywater-${TECH}
+
+# EF process nodes created from the master sources
+SKY130A = sky130A
+
+ifeq (${LINK_TARGETS}, ${SKY130A})
+    DIST_LINK_TARGETS = ${LOCAL_PATH}/${LINK_TARGETS}
+else
+    DIST_LINK_TARGETS = ${LINK_TARGETS}
+endif
+
+# Basic definitions for each EF process node
+SKY130A_DEFS = -DTECHNAME=sky130A -DREVISION=${REVISION}
+
+# Module definitions for each process node
+# (Note that MOS is default and therefore not used anywhere)
+# SKY130A_DEFS += -DMETAL5 -DMIM -DREDISTRIBUTION
+SKY130A_DEFS += -DMETAL5 -DMIM
+
+# Add staging path
+SKY130A_DEFS += -DSTAGING_PATH=${STAGING_PATH}
+
+ifeq (${EF_STYLE}, 1)
+    EF_FORMAT = -ef_format
+    SKY130A_DEFS += -DEF_FORMAT
+else
+    EF_FORMAT = -std_format
+endif
+
+MAGICTOP = libs.tech/magic
+NETGENTOP = libs.tech/netgen
+QFLOWTOP = libs.tech/qflow
+KLAYOUTTOP = libs.tech/klayout
+OPENLANETOP = libs.tech/openlane
+
+ifeq (${EF_STYLE}, 1)
+    MAGICPATH = ${MAGICTOP}/${REVISION}
+else
+    MAGICPATH = ${MAGICTOP}
+endif
+
+# Currently, netgen, qflow, and klayout do not use revisioning (needs to change!)
+NETGENPATH = ${NETGENTOP}
+QFLOWPATH = ${QFLOWTOP}
+KLAYOUTPATH = ${KLAYOUTTOP}
+OPENLANEPATH = ${OPENLANETOP}
+
+MAGICTOP_STAGING_A = ${STAGING_PATH}/${SKY130A}/${MAGICTOP}
+NETGENTOP_STAGING_A = ${STAGING_PATH}/${SKY130A}/${NETGENTOP}
+QFLOWTOP_STAGING_A = ${STAGING_PATH}/${SKY130A}/${QFLOWTOP}
+KLAYOUTTOP_STAGING_A = ${STAGING_PATH}/${SKY130A}/${KLAYOUTTOP}
+OPENLANETOP_STAGING_A = ${STAGING_PATH}/${SKY130A}/${OPENLANETOP}
+
+MAGIC_STAGING_A = ${STAGING_PATH}/${SKY130A}/${MAGICPATH}
+NETGEN_STAGING_A = ${STAGING_PATH}/${SKY130A}/${NETGENPATH}
+QFLOW_STAGING_A = ${STAGING_PATH}/${SKY130A}/${QFLOWPATH}
+KLAYOUT_STAGING_A = ${STAGING_PATH}/${SKY130A}/${KLAYOUTPATH}
+OPENLANE_STAGING_A = ${STAGING_PATH}/${SKY130A}/${OPENLANEPATH}
+
+SKY130A_DEFS += -DMAGIC_CURRENT=${MAGICTOP}/current
+
+# Where cpp syntax is followed, this is equivalent to cpp, but it does not
+# mangle non-C source files under the belief that they are actually C code.
+CPP   = ../common/preproc.py
+
+# The following script in the ../common directory does most of the work of
+# copying or linking the foundry vendor files to the target directory.
+STAGE = set -f ; ../common/foundry_install.py ${EF_FORMAT}
+INSTALL = ../common/staging_install.py ${EF_FORMAT}
+
+# The script(s) below are used for custom changes to the vendor PDK files
+ADDPROP = ../common/insert_property.py ${EF_FORMAT} 
+
+# List the EDA tools to install local setup files for
+TOOLS = magic qflow netgen klayout openlane
+
+all: all-a
+
+all-a:
+	echo "Starting sky130A PDK staging on "`date` > ${SKY130A}_install.log
+	${MAKE} tools-a
+	${MAKE} vendor-a
+	echo "Ended sky130A PDK staging on "`date` >> ${SKY130A}_install.log
+
+tools-a: general-a magic-a qflow-a netgen-a klayout-a openlane-a
+
+general-a: ${TECH}.json
+	mkdir -p ${STAGING_PATH}/${SKY130A}/${CONFIG_DIR}
+	rm -f ${STAGING_PATH}/${SKY130A}/${CONFIG_DIR}/nodeinfo.json
+	${CPP} ${SKY130A_DEFS} ${TECH}.json > \
+		${STAGING_PATH}/${SKY130A}/${CONFIG_DIR}/nodeinfo.json
+
+magic-a: ${TECH}.tech ${TECH}gds.tech ${TECH}.magicrc ${TECH}.tcl
+	mkdir -p ${MAGICTOP_STAGING_A}
+	mkdir -p ${MAGIC_STAGING_A}
+	rm -f ${MAGICTOP_STAGING_A}/current
+	rm -f ${MAGIC_STAGING_A}/${SKY130A}.tech
+	rm -f ${MAGIC_STAGING_A}/${SKY130A}-GDS.tech
+	rm -f ${MAGIC_STAGING_A}/${SKY130A}.tcl
+	rm -f ${MAGIC_STAGING_A}/${SKY130A}-BindKeys
+	rm -f ${MAGIC_STAGING_A}/magicrc
+	(cd ${MAGICTOP_STAGING_A} ; ln -s ${REV_DIR} current)
+	cp -rp custom/scripts/seal_ring_generator ${MAGIC_STAGING_A}/.
+	${CPP} ${SKY130A_DEFS} ${TECH}.tech > ${MAGIC_STAGING_A}/${SKY130A}.tech
+	${CPP} ${SKY130A_DEFS} ${TECH}gds.tech > ${MAGIC_STAGING_A}/${SKY130A}-GDS.tech
+	${CPP} ${SKY130A_DEFS} ${TECH}.magicrc > ${MAGIC_STAGING_A}/${SKY130A}.magicrc
+	${CPP} ${SKY130A_DEFS} ../common/pdk.bindkeys > ${MAGIC_STAGING_A}/${SKY130A}-BindKeys
+	${CPP} ${SKY130A_DEFS} ${TECH}.tcl > ${MAGIC_STAGING_A}/${SKY130A}.tcl
+	${CPP} ${SKY130A_DEFS} ../common/pdk.tcl >> ${MAGIC_STAGING_A}/${SKY130A}.tcl
+
+qflow-a: ${TECH}.sh ${TECH}.par
+	mkdir -p ${QFLOWTOP_STAGING_A}
+	mkdir -p ${QFLOW_STAGING_A}
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}hd.sh
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}hd.par
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}hdll.sh
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}hdll.par
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}hs.sh
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}hs.par
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}hvl.sh
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}hvl.par
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}ls.sh
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}ls.par
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}lp.sh
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}lp.par
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}ms.sh
+	rm -f ${QFLOW_STAGING_A}/${SKY130A}ms.par
+	${CPP} ${SKY130A_DEFS} -DLIBRARY=sky130_fd_sc_hd ${TECH}.sh > \
+		${QFLOW_STAGING_A}/${SKY130A}hd.sh
+	${CPP} ${SKY130A_DEFS} -DLIBRARY=sky130_fd_sc_hdll ${TECH}.sh > \
+		${QFLOW_STAGING_A}/${SKY130A}hdll.sh
+	${CPP} ${SKY130A_DEFS} -DLIBRARY=sky130_fd_sc_hvl ${TECH}.sh > \
+		${QFLOW_STAGING_A}/${SKY130A}hvl.sh
+	${CPP} ${SKY130A_DEFS} -DLIBRARY=sky130_fd_sc_hs ${TECH}.sh > \
+		${QFLOW_STAGING_A}/${SKY130A}hs.sh
+	${CPP} ${SKY130A_DEFS} -DLIBRARY=sky130_fd_sc_lp ${TECH}.sh > \
+		${QFLOW_STAGING_A}/${SKY130A}lp.sh
+	${CPP} ${SKY130A_DEFS} -DLIBRARY=sky130_fd_sc_ls ${TECH}.sh > \
+		${QFLOW_STAGING_A}/${SKY130A}ls.sh
+	${CPP} ${SKY130A_DEFS} -DLIBRARY=sky130_fd_sc_ms ${TECH}.sh > \
+		${QFLOW_STAGING_A}/${SKY130A}ms.sh
+	${CPP} ${SKY130A_DEFS} ${TECH}.par > ${QFLOW_STAGING_A}/${SKY130A}hd.par
+	${CPP} ${SKY130A_DEFS} ${TECH}.par > ${QFLOW_STAGING_A}/${SKY130A}hdll.par
+	${CPP} ${SKY130A_DEFS} ${TECH}.par > ${QFLOW_STAGING_A}/${SKY130A}hvl.par
+	${CPP} ${SKY130A_DEFS} ${TECH}.par > ${QFLOW_STAGING_A}/${SKY130A}hs.par
+	${CPP} ${SKY130A_DEFS} ${TECH}.par > ${QFLOW_STAGING_A}/${SKY130A}ms.par
+	${CPP} ${SKY130A_DEFS} ${TECH}.par > ${QFLOW_STAGING_A}/${SKY130A}lp.par
+	${CPP} ${SKY130A_DEFS} ${TECH}.par > ${QFLOW_STAGING_A}/${SKY130A}ls.par
+	${CPP} ${SKY130A_DEFS} ${TECH}.par > ${QFLOW_STAGING_A}/${SKY130A}osu.par
+
+netgen-a: ${TECH}_setup.tcl
+	mkdir -p ${NETGENTOP_STAGING_A}
+	mkdir -p ${NETGEN_STAGING_A}
+	rm -f ${NETGEN_STAGING_A}/${SKY130A}_setup.tcl
+	rm -f ${NETGEN_STAGING_A}/setup.tcl
+	${CPP} ${SKY130A_DEFS} ${TECH}_setup.tcl > ${NETGEN_STAGING_A}/${SKY130A}_setup.tcl
+	(cd ${NETGEN_STAGING_A} ; ln -s ${SKY130A}_setup.tcl setup.tcl)
+
+klayout-a: ${TECH}.lyp ${TECH}.lyt
+	mkdir -p ${KLAYOUTTOP_STAGING_A}
+	mkdir -p ${KLAYOUT_STAGING_A}
+	rm -f ${KLAYOUT_STAGING_A}/${SKY130A}.lyp
+	rm -f ${KLAYOUT_STAGING_A}/${SKY130A}.lyt
+	${CPP} ${SKY130A_DEFS} ${TECH}.lyp > ${KLAYOUT_STAGING_A}/${SKY130A}.lyp
+	${CPP} ${SKY130A_DEFS} ${TECH}.lyt > ${KLAYOUT_STAGING_A}/${SKY130A}.lyt
+
+openlane-a: common_pdn.tcl common_tracks.info config.tcl sky130_fd_sc_hd_config.tcl
+	mkdir -p ${OPENLANETOP_STAGING_A}
+	mkdir -p ${OPENLANE_STAGING_A}
+	mkdir -p ${OPENLANE_STAGING_A}/sky130_fd_sc_hd
+	rm -f ${OPENLANE_STAGING_A}/common_pdn.info
+	rm -f ${OPENLANE_STAGING_A}/common_tracks.info
+	rm -f ${OPENLANE_STAGING_A}/config.tcl
+	rm -f ${OPENLANE_STAGING_A}/sky130_fd_sc_hd/config.tcl
+	${CPP} ${SKY130A_DEFS} common_pdn.tcl > ${OPENLANE_STAGING_A}/common_pdn.tcl
+	${CPP} ${SKY130A_DEFS} common_tracks.info > ${OPENLANE_STAGING_A}/common_tracks.info
+	${CPP} ${SKY130A_DEFS} config.tcl > ${OPENLANE_STAGING_A}/config.tcl
+	${CPP} ${SKY130A_DEFS} sky130_fd_sc_hd_config.tcl > ${OPENLANE_STAGING_A}/sky130_fd_sc_hd/config.tcl
+
+vendor-a:
+	# Install base device models from vendor files
+	# (NOTE: .mod and .pm3 files should not be in /cells/?)
+	${STAGE} -source ${SKYWATER_PATH} -target ${STAGING_PATH}/${SKY130A} \
+		-ngspice sky130_fd_pr_base/v%v/models/* filter=custom/scripts/fixspice.py \
+		-ngspice sky130_fd_pr_base/v%v/cells/*.mod filter=custom/scripts/fixspice.py \
+		-ngspice sky130_fd_pr_base/v%v/cells/*.pm3 filter=custom/scripts/fixspice.py \
+		|& tee -a ${SKY130A}_install.log
+	# Install RF device models from vendor files
+	${STAGE} -source ${SKYWATER_PATH} -target ${STAGING_PATH}/${SKY130A} \
+		-ngspice sky130_fd_pr_rf/v%v/models/* filter=custom/scripts/fixspice.py \
+		|& tee -a ${SKY130A}_install.log
+	# Install additional RF device models from vendor files
+	${STAGE} -source ${SKYWATER_PATH} -target ${STAGING_PATH}/${SKY130A} \
+		-ngspice sky130_fd_pr_rf2/v%v/models/* filter=custom/scripts/fixspice.py \
+		|& tee -a ${SKY130A}_install.log
+	# Install base device library from vendor files
+	${STAGE} -source ${SKYWATER_PATH} -target ${STAGING_PATH}/${SKY130A} \
+		-gds %l/v%v/cells/*/*.gds \
+		-spice %l/v%v/cells/*/*.spice ignore=topography \
+		-spice %l/v%v/cells/*/*.sp \
+		-library primitive sky130_fd_pr_base \
+		-library primitive sky130_fd_pr_rf \
+		-library primitive sky130_fd_pr_rf2 |& tee -a ${SKY130A}_install.log
+	# Install SkyWater I/O pad library
+	# Purposely ignoring "-lef sky130_fd_io/v%v/lef/*.lef" and making our own LEF views
+	${STAGE} -source ${SKYWATER_PATH} -target ${STAGING_PATH}/${SKY130A} \
+		-gds %l/v%v/cells/*/*.gds \
+		-verilog %l/v%v/cells/*/*.v \
+		-lib %l/v%v/cells/*/*.lib \
+		-doc %l/v%v/cells/*/*.doc \
+		-cdl %l/v%v/cells/*/*.cdl ignore=topography \
+		-spice %l/v%v/cells/*/*.spice  \
+		-library general sky130_fd_io |& tee -a ${SKY130A}_install.log
+        # Install all SkyWater digital standard cells.
+	${STAGE} -source ${SKYWATER_PATH} -target ${STAGING_PATH}/${SKY130A} \
+		-spice %l/v%v/cells/*/*.spice compile-only \
+		-cdl %l/v%v/cells/*/*.cdl ignore=topography compile-only \
+		-lef %l/v%v/cells/*/*.lef compile-only \
+		-doc %l/v%v/cells/*/*.pdf \
+		-lib %l/v%v/timing/*.lib \
+		-gds %l/v%v/cells/*/*.gds compile-only \
+		-verilog %l/v%v/cells/*/*.v exclude=*.*.v compile-only \
+		-library digital sky130_fd_sc_hd \
+		-library digital sky130_fd_sc_hdll \
+		-library digital sky130_fd_sc_hvl \
+		-library digital sky130_fd_sc_hs \
+		-library digital sky130_fd_sc_ls \
+		-library digital sky130_fd_sc_ms \
+		-library digital sky130_fd_sc_lp |& tee -a ${SKY130A}_install.log
+	# Install additional model file (efabless)
+	${STAGE} -source ./custom -target ${STAGING_PATH}/${SKY130A} \
+		-ngspice models/*.lib rename ${SKY130A}.lib \
+		|& tee -a ${SKY130A}_install.log
+	# Install custom additions to digital libraries
+	${STAGE} -source ./custom -target ${STAGING_PATH}/${SKY130A} \
+		-techlef techLEF/sky130_fd_sc_hd_tech.lef \
+		-library digital sky130_fd_sc_hd |& tee -a ${SKY130A}_install.log
+	${STAGE} -source ./custom -target ${STAGING_PATH}/${SKY130A} \
+		-techlef techLEF/sky130_fd_sc_hd_tech.lef \
+			rename sky130_fd_sc_hdll_tech.lef \
+		-library digital sky130_fd_sc_hdll |& tee -a ${SKY130A}_install.log
+	${STAGE} -source ./custom -target ${STAGING_PATH}/${SKY130A} \
+		-techlef techLEF/sky130_fd_sc_hs_tech.lef \
+		-library digital sky130_fd_sc_hs |& tee -a ${SKY130A}_install.log
+	${STAGE} -source ./custom -target ${STAGING_PATH}/${SKY130A} \
+		-techlef techLEF/sky130_fd_sc_hs_tech.lef \
+			rename sky130_fd_sc_ms_tech.lef \
+		-library digital sky130_fd_sc_ms |& tee -a ${SKY130A}_install.log
+	${STAGE} -source ./custom -target ${STAGING_PATH}/${SKY130A} \
+		-techlef techLEF/sky130_fd_sc_hs_tech.lef \
+			rename sky130_fd_sc_ls_tech.lef \
+		-library digital sky130_fd_sc_ls |& tee -a ${SKY130A}_install.log
+	# Install custom additions to I/O pad library
+	${STAGE} -source ./custom -target ${STAGING_PATH}/${SKY130A} \
+		-gds %l/gds/*.gds \
+		-verilog %l/verilog/*.v \
+		-lef %l/lef/*.lef \
+		-spice %l/spice/*.spice \
+		-library general sky130_fd_io |& tee -a ${SKY130A}_install.log
+	# Add correct bounding boxes on Magic layouts
+	${ADDPROP} ${STAGING_PATH}/${SKY130A} sky130_fd_io sky130_fd_io_top_gpio_ovtv2 \
+		"FIXED_BBOX 0 407 28000 40000"
+	${ADDPROP} ${STAGING_PATH}/${SKY130A} sky130_fd_io sky130_fd_io_top_xres4v2 \
+		"FIXED_BBOX 0 407 15000 40000"
+
+install: install-local
+
+install-local: install-local-a
+
+install-local-a:
+	echo "Starting SKY130 PDK migration on "`date` > ${SKY130A}_migrate.log
+	${INSTALL} -source ${STAGING_PATH}/${SKY130A} \
+		-target ${LOCAL_PATH}/${SKY130A} \
+		-link_from ${LINK_TARGETS} |& tee -a ${SKY130A}_migrate.log
+	echo "Ended SKY130 PDK migration on "`date` >> ${SKY130A}_migrate.log
+
+install-dist: install-dist-a
+
+install-dist-a:
+	echo "Starting SKY130 PDK migration on "`date` > ${SKY130A}_migrate.log
+	${INSTALL} -source ${STAGING_PATH}/${SKY130A} \
+		-target ${DIST_PATH}/${SKY130A} \
+		-local ${LOCAL_PATH}/${SKY130A} \
+		-link_from ${DIST_LINK_TARGETS} |& tee -a ${SKY130A}_migrate.log
+	echo "Ended SKY130 PDK migration on "`date` >> ${SKY130A}_migrate.log
+
+clean: clean-a
+
+clean-a:
+	${STAGE} -target ${STAGING_PATH}/${SKY130A} -clean
+
+veryclean: veryclean-a
+
+veryclean-a: clean-a
+	${RM} ${SKY130A}_install.log
+	${RM} ${SKY130A}_migrate.log
diff --git a/sky130/README b/sky130/README
new file mode 100644
index 0000000..00b9851
--- /dev/null
+++ b/sky130/README
@@ -0,0 +1,180 @@
+------------------------------------
+open_pdks
+----------------------------------------
+Master PDK generator for SkyWater Sky130
+Hybrid 180nm / 130nm foundry process
+for open source EDA tools
+----------------------------------------
+
+-------------------------------------------------------------------------------
+Prerequisites:
+
+1. Foundry source files:
+
+    Obtain sources for the SkyWater sky130 130nm process from the git repository at
+    the following location:
+
+	 https://github.com/google/skywater-pdk
+
+    This repository may go in any convenient location.  The Makefile suggests
+    the target location ~/projects/foundry/skywater-pdk but any location will
+    do as long as the definition for CYPRESS_PATH in the Makefile is set
+    appropriately.
+
+    So cd to the target location parent directory (e.g., "cd ~/projects/foundry")
+    and run the following command:
+
+	 git clone https://github.com/google/skywater-pdk
+
+    Then follow the instructions below.
+
+2. EDA tools:
+
+    For installing files to use with the Magic layout tool, Magic must be installed.
+    Obtain Magic from:
+
+	https://github.com/RTimothyEdwards/magic
+
+-------------------------------------------------------------------------------
+Installation:
+
+    There are two methods for installation:  Local and Distribution.  Use Local
+    installation if you are installing on a single host computer.  Use Distribution
+    installation if you are installing into a respository (such as git) that will
+    be distributed to multiple hosts.
+
+Step 1:
+
+    Edit the Makefile to set the following definitions for your host system:
+
+	EF_STYLE = Select "1" for an efabless-style file structure, "0"
+			otherwise.  There are only minor differences in
+			these two styles, namely for version tracking of
+			the Magic setup files, and the location of the
+			technology LEF file.
+
+	LINK_TARGETS = "none" or "source".  "none" copies files from the source
+			directories to the target.  "source" makes symbolic links
+			to the source directories.  Use "source" only if doing
+			a local install, and the source foundry data will not
+			be deleted.  For distribution installations, LINK_TARGETS
+			must be set to "none".
+
+	LOCAL_PATH = The path to the target install directory.  This is used
+			in both the local and distribution installations.  For
+			a distribution installation, this is the local name of
+			the path to the PDK after it has been distributed to
+			the host computers.
+
+	DIST_PATH = The path to the location of the installed files prior to
+			distribution.  This will most likely be a git or similar
+			repo.
+
+Step 2:
+	Run:
+
+	    make
+
+	This will pre-process the setup files to create the PDK-specific files
+	for the SKY130A PDK, and process all vendor files, and place everything
+	in a local staging area.
+
+Step 3:
+	For a local install, do:
+
+	    make install-local
+
+	This copies all files from the staging area into the destination
+	as specified by the variable LOCAL_PATH in the Makefile.  All
+	pointers to absolute paths in the files are changed to match
+	LOCAL_PATH.
+
+	For a distribution install, do:
+
+	    make install-dist
+
+	This copies all files from the staging area into the destination
+	as specified by the variable DIST_PATH in the Makefile.  All
+	pointers to absolute paths in the files are changed to match
+	LOCAL_PATH.  The assumption is that DIST_PATH is a repository
+	(such as a git repo) that is cloned to multiple hosts, and
+	the destination on the hosts where it is distributed is
+	LOCAL_PATH.
+
+-------------------------------------------------------------------------------
+Summary:
+
+    The Makefile script takes the source files and generates files for local
+    PDK names "SKY130A", "SKY130B", etc.  (Note there is currently only one
+    PDK variant "A".)
+
+    The definition of each PDK is made in the Makefile using defines; e.g.,
+	-DMETAL5, etc.
+
+    The make script makes use of the python script "preproc.py" (in the ../common
+    directory) to parse each source file for "#ifdef ..."-type macros.  The syntax
+    is similar to that used by the C preprocessor (cpp) but does not assume C
+    language syntax in the input file, so is generally better to use than cpp
+    (has less unexpected/unintentional behavior).  See comments in the preproc.py
+    script for a full list of macros that it accepts (short list: #ifdef, #ifndef,
+    #define, #include, and boolean operators ||, &&, and !). 
+
+    Files generated:
+	.tech		techfile for magic (full DRC, extract, GDS)
+	-GDS.tech	techfile for magic, vendor mask layers
+	.tcl		PDK script for magic
+	-BindKeys	key binding script for magic partly matching Cadence defaults
+	.magicrc	magic startup script (copy to local directory as .magicrc)
+	_setup.tcl	netgen setup script for LVS
+	.sh		qflow master setup script, standard 1.8V digital
+	.par		graywolf setup file, standard 1.8V digital
+
+    The installation directory below LOCAL_PATH is the name of the PDK;  e.g.,
+
+	    sky130A/		5-metal stack with MiM cap and redistribution layer
+
+    The installation directory hierarchy below the PDK name looks like the following:
+
+		libs.tech/		technology and setup files
+
+		    magic/		magic techfiles, startup file, PDK script,
+					and key binding script.
+		    netgen/		netgen setup file
+		    qflow/		qflow scripts and graywolf setup files.
+		    klayout/		setup files for klayout
+		    openlane/		setup files for openlane
+
+		libs.ref/		foundry data
+
+		    cdl/		CDL netlists
+		    doc/		Foundry documentation
+		    gds/		GDS files
+		    lef/		LEF macro files
+		    lib/		Timing files
+		    mag/		Magic files derived from GDS
+		    maglef/		Magic files derived from LEF macros
+		    spice/		SPICE netlists (ngspice compatible)
+		    techlef/		LEF technology files
+		    verilog/		verilog modules
+
+    Each subdirectory of libs.ref is further divided into sections based on the
+    IP type.  The section names are largely foundry-dependent.  For SkyWater Sky130,
+    these sections include one or more of:
+
+			sky130_fd_sc_hd/		1.8V digital logic (high density)
+			sky130_fd_sc_hdll/		1.8V digital logic (high density low leakage)
+			sky130_fd_sc_hs/		1.8V digital logic (low power)
+			sky130_fd_sc_hvl/		1.8V digital logic (low speed)
+			sky130_fd_sc_lp/		1.8V digital logic (medium speed)
+			sky130_fd_sc_ls/		1.8V digital logic (high speed)
+			sky130_fd_sc_ms/		3.3V digital logic
+
+			sky130_fd_io/			Standard I/O
+
+			sky130_fd_pr_base/		Primitive devices w/fixed layout
+			sky130_fd_pr_rf/		RF primitive devices w/fixed layout
+			sky130_fd_pr_rf2/		Additional RF primitive devices w/fixed layout
+
+    The target installation destinations assume the directory structure above.  Changing
+    this requires editing the source files.
+
diff --git a/sky130/common_pdn.tcl b/sky130/common_pdn.tcl
new file mode 100644
index 0000000..9ad2264
--- /dev/null
+++ b/sky130/common_pdn.tcl
@@ -0,0 +1,44 @@
+# Power nets
+set ::power_nets "VDD"
+set ::ground_nets "VSS"
+
+set ::macro_blockage_layer_list "li1 met1 met2 met3 met4 met5"
+
+pdngen::specify_grid stdcell {
+    name grid
+    rails {
+	    met1 {width 0.48 pitch $::env(PLACE_SITE_WIDTH) offset 0}
+    }
+    straps {
+	    met4 {width 1.6 pitch $::env(FP_PDN_VPITCH) offset $::env(FP_PDN_VOFFSET)}
+	    met5 {width 1.6 pitch $::env(FP_PDN_HPITCH) offset $::env(FP_PDN_HOFFSET)}
+    }
+    connect {{met1 met4} {met4 met5}}
+}
+
+pdngen::specify_grid macro {
+    orient {R0 R180 MX MY R90 R270 MXR90 MYR90}
+    power_pins "VDDE"
+    ground_pins "VSSE"
+    blockages "li1 met1 met2 met3 met4 met5" 
+    straps { 
+    } 
+    connect { }
+}
+
+set ::halo 0
+
+# Metal layer for rails on every row
+set ::rails_mlayer "met1" ;
+
+# POWER or GROUND #Std. cell rails starting with power or ground rails at the bottom of the core area
+set ::rails_start_with "POWER" ;
+
+# POWER or GROUND #Upper metal stripes starting with power or ground rails at the left/bottom of the core area
+set ::stripes_start_with "POWER" ;
+
+proc generate_viarules {} {
+}
+
+cd $::env(TMP_DIR)/floorplan
+
diff --git a/sky130/common_tracks.info b/sky130/common_tracks.info
new file mode 100644
index 0000000..948dbd2
--- /dev/null
+++ b/sky130/common_tracks.info
@@ -0,0 +1,12 @@
+li1 X 0.23 0.46
+li1 Y 0.17 0.34
+met1 X 0.17 0.34
+met1 Y 0.17 0.34
+met2 X 0.23 0.46
+met2 Y 0.23 0.46
+met3 X 0.34 0.68
+met3 Y 0.34 0.68
+met4 X 0.46 0.92
+met4 Y 0.46 0.92
+met5 X 1.70 3.40
+met5 Y 1.70 3.40
diff --git a/sky130/config.tcl b/sky130/config.tcl
new file mode 100644
index 0000000..d34b05f
--- /dev/null
+++ b/sky130/config.tcl
@@ -0,0 +1,31 @@
+# Process node
+set ::env(PROCESS) 130
+set ::env(DEF_UNITS_PER_MICRON) 1000
+
+
+# Placement site for core cells
+# This can be found in the technology lef
+set ::env(PLACE_SITE) "unithd"
+set ::env(PLACE_SITE_WIDTH) 0.460
+set ::env(PLACE_SITE_HEIGHT) 2.720
+
+set ::env(VDD_PIN) "vpwr"
+set ::env(GND_PIN) "vgnd"
+
+# Track information for generating DEF tracks
+set ::env(TRACKS_INFO_FILE) "$::env(PDK_ROOT)/$::env(PDK)/libs.tech/openlane/common_tracks.info"
+
+
+# Technology LEF
+set ::env(TECH_LEF) "$::env(PDK_ROOT)/$::env(PDK)/libs.ref/techLEF/$::env(PDK_VARIANT)/$::env(PDK_VARIANT)_tech.lef"
+set ::env(CELLS_LEF) [glob "$::env(PDK_ROOT)/$::env(PDK)/libs.ref/lef/$::env(PDK_VARIANT)/*.lef"]
+set ::env(MAGIC_TECH_FILE) "$::env(PDK_ROOT)/$::env(PDK)/libs.tech/magic/current/EFS8A.tech"
+set ::env(MAGIC_MAGICRC) "$::env(PDK_ROOT)/$::env(PDK)/libs.tech/magic/current/EFS8A.magicrc"
+set ::env(GPIO_PADS_LEF) [glob "$::env(PDK_ROOT)/$::env(PDK)/libs.ref/lef/s8iom0s8/routing_abstract/*.lef"]
+
+# netgen setup
+set ::env(NETGEN_SETUP_FILE) $::env(PDK_ROOT)/$::env(PDK)/libs.tech/netgen/$::env(PDK)_setup.tcl 
+# CTS luts
+set ::env(CTS_TECH_DIR) "N/A"
+
+set ::env(FP_TAPCELL_DIST) 20
diff --git a/sky130/custom/models/sky130.lib b/sky130/custom/models/sky130.lib
new file mode 100644
index 0000000..04c51ed
--- /dev/null
+++ b/sky130/custom/models/sky130.lib
@@ -0,0 +1,170 @@
+******* SkyWater s8 model library *********
+* Typical corner (tt)
+.lib tt
+* MOSFET
+.inc "./sky130_fd_pr_base__nshort_tt.cor"
+.inc "./sky130_fd_pr_base__nlowvt_tt.cor"
+.inc "./sky130_fd_pr_base__pshort_tt.cor"
+.inc "./sky130_fd_pr_base__ntvnative_tt.cor"
+.inc "./sky130_fd_pr_base__nhvnative_tt.cor"
+.inc "./sky130_fd_pr_base__nshortesd_tt.cor"
+.inc "./sky130_fd_pr_base__plowvt_tt.cor"
+.inc "./sky130_fd_pr_base__phighvt_tt.cor"
+.inc "./sky130_fd_pr_base__phvesd_tt.cor"
+.inc "./sky130_fd_pr_base__phv_tt.cor"
+.inc "./sky130_fd_pr_base__pvhv_tt.cor"
+.inc "./sky130_fd_pr_base__nhv_tt.cor"
+.inc "./sky130_fd_pr_base__nvhv_tt_discrete.cor"
+.inc "./sky130_fd_pr_base__nhvesd_tt.cor"
+.inc "./sky130_fd_pr_base__tt_nonfet.cor"
+* Mismatch parameters
+.inc "./sky130_fd_pr_base__nshort_mm.cor"
+.inc "./sky130_fd_pr_base__pshort_mm.cor"
+.inc "./sky130_fd_pr_base__nlowvt_mm.cor"
+.inc "./sky130_fd_pr_base__plowvt_mm.cor"
+.inc "./sky130_fd_pr_base__phighvt_mm.cor"
+.inc "./sky130_fd_pr_base__nhv_mm.cor"
+.inc "./sky130_fd_pr_base__phv_mm.cor"
+.inc "./sky130_fd_pr_base__nhvnative_mm.cor"
+.inc "./sky130_fd_pr_base__ntvnative_mm.cor"
+* All models
+.inc "models.all"
+* Corner
+.include "ttrf.cor"
+.endl
+
+* Slow-Fast corner (sf)
+.lib sf
+* MOSFET
+.inc "./sky130_fd_pr_base__nshort_sf.cor"
+.inc "./sky130_fd_pr_base__nlowvt_sf.cor"
+.inc "./sky130_fd_pr_base__pshort_sf.cor"
+.inc "./sky130_fd_pr_base__ntvnative_sf.cor"
+.inc "./sky130_fd_pr_base__nhvnative_sf.cor"
+.inc "./sky130_fd_pr_base__nshortesd_sf.cor"
+.inc "./sky130_fd_pr_base__plowvt_sf.cor"
+.inc "./sky130_fd_pr_base__phighvt_sf.cor"
+.inc "./sky130_fd_pr_base__phvesd_sf.cor"
+.inc "./sky130_fd_pr_base__phv_sf.cor"
+.inc "./sky130_fd_pr_base__pvhv_sf.cor"
+.inc "./sky130_fd_pr_base__nhv_sf.cor"
+.inc "./sky130_fd_pr_base__nvhv_sf_discrete.cor"
+.inc "./sky130_fd_pr_base__nhvesd_sf.cor"
+.inc "./sky130_fd_pr_base__sf_nonfet.cor"
+* Mismatch parameters
+.inc "./sky130_fd_pr_base__nshort_mm.cor"
+.inc "./sky130_fd_pr_base__pshort_mm.cor"
+.inc "./sky130_fd_pr_base__nlowvt_mm.cor"
+.inc "./sky130_fd_pr_base__plowvt_mm.cor"
+.inc "./sky130_fd_pr_base__phighvt_mm.cor"
+.inc "./sky130_fd_pr_base__nhv_mm.cor"
+.inc "./sky130_fd_pr_base__phv_mm.cor"
+.inc "./sky130_fd_pr_base__nhvnative_mm.cor"
+.inc "./sky130_fd_pr_base__ntvnative_mm.cor"
+* All models
+.inc "models.all"
+* Corner
+.include "sfrf.cor"
+.endl
+
+* Fast-Fast corner (ff)
+.lib ff
+* MOSFET
+.inc "./sky130_fd_pr_base__nshort_ff.cor"
+.inc "./sky130_fd_pr_base__nlowvt_ff.cor"
+.inc "./sky130_fd_pr_base__pshort_ff.cor"
+.inc "./sky130_fd_pr_base__ntvnative_ff.cor"
+.inc "./sky130_fd_pr_base__nhvnative_ff.cor"
+.inc "./sky130_fd_pr_base__nshortesd_ff.cor"
+.inc "./sky130_fd_pr_base__plowvt_ff.cor"
+.inc "./sky130_fd_pr_base__phighvt_ff.cor"
+.inc "./sky130_fd_pr_base__phvesd_ff.cor"
+.inc "./sky130_fd_pr_base__phv_ff.cor"
+.inc "./sky130_fd_pr_base__pvhv_ff.cor"
+.inc "./sky130_fd_pr_base__nhv_ff.cor"
+.inc "./sky130_fd_pr_base__nvhv_ff_discrete.cor"
+.inc "./sky130_fd_pr_base__nhvesd_ff.cor"
+.inc "./sky130_fd_pr_base__ff_nonfet.cor"
+* Mismatch parameters
+.inc "./sky130_fd_pr_base__nshort_mm.cor"
+.inc "./sky130_fd_pr_base__pshort_mm.cor"
+.inc "./sky130_fd_pr_base__nlowvt_mm.cor"
+.inc "./sky130_fd_pr_base__plowvt_mm.cor"
+.inc "./sky130_fd_pr_base__phighvt_mm.cor"
+.inc "./sky130_fd_pr_base__nhv_mm.cor"
+.inc "./sky130_fd_pr_base__phv_mm.cor"
+.inc "./sky130_fd_pr_base__nhvnative_mm.cor"
+.inc "./sky130_fd_pr_base__ntvnative_mm.cor"
+* All models
+.inc "models.all"
+* Corner
+.include "ffrf.cor"
+.endl
+
+* Slow-Slow corner (ss)
+.lib ss
+* MOSFET
+.inc "./sky130_fd_pr_base__nshort_ss.cor"
+.inc "./sky130_fd_pr_base__nlowvt_ss.cor"
+.inc "./sky130_fd_pr_base__pshort_ss.cor"
+.inc "./sky130_fd_pr_base__ntvnative_ss.cor"
+.inc "./sky130_fd_pr_base__nhvnative_ss.cor"
+.inc "./sky130_fd_pr_base__nshortesd_ss.cor"
+.inc "./sky130_fd_pr_base__plowvt_ss.cor"
+.inc "./sky130_fd_pr_base__phighvt_ss.cor"
+.inc "./sky130_fd_pr_base__phvesd_ss.cor"
+.inc "./sky130_fd_pr_base__phv_ss.cor"
+.inc "./sky130_fd_pr_base__pvhv_ss.cor"
+.inc "./sky130_fd_pr_base__nhv_ss.cor"
+.inc "./sky130_fd_pr_base__nvhv_ss_discrete.cor"
+.inc "./sky130_fd_pr_base__nhvesd_ss.cor"
+.inc "./sky130_fd_pr_base__ss_nonfet.cor"
+* Mismatch parameters
+.inc "./sky130_fd_pr_base__nshort_mm.cor"
+.inc "./sky130_fd_pr_base__pshort_mm.cor"
+.inc "./sky130_fd_pr_base__nlowvt_mm.cor"
+.inc "./sky130_fd_pr_base__plowvt_mm.cor"
+.inc "./sky130_fd_pr_base__phighvt_mm.cor"
+.inc "./sky130_fd_pr_base__nhv_mm.cor"
+.inc "./sky130_fd_pr_base__phv_mm.cor"
+.inc "./sky130_fd_pr_base__nhvnative_mm.cor"
+.inc "./sky130_fd_pr_base__ntvnative_mm.cor"
+* All models
+.inc "models.all"
+* Corner
+.include "ssrf.cor"
+.endl
+
+* Fast-Slow corner (fs)
+.lib fs
+* MOSFET
+.inc "./sky130_fd_pr_base__nshort_fs.cor"
+.inc "./sky130_fd_pr_base__nlowvt_fs.cor"
+.inc "./sky130_fd_pr_base__pshort_fs.cor"
+.inc "./sky130_fd_pr_base__ntvnative_fs.cor"
+.inc "./sky130_fd_pr_base__nhvnative_fs.cor"
+.inc "./sky130_fd_pr_base__nshortesd_fs.cor"
+.inc "./sky130_fd_pr_base__plowvt_fs.cor"
+.inc "./sky130_fd_pr_base__phighvt_fs.cor"
+.inc "./sky130_fd_pr_base__phvesd_fs.cor"
+.inc "./sky130_fd_pr_base__phv_fs.cor"
+.inc "./sky130_fd_pr_base__pvhv_fs.cor"
+.inc "./sky130_fd_pr_base__nhv_fs.cor"
+.inc "./sky130_fd_pr_base__nvhv_fs_discrete.cor"
+.inc "./sky130_fd_pr_base__nhvesd_fs.cor"
+.inc "./sky130_fd_pr_base__fs_nonfet.cor"
+* Mismatch parameters
+.inc "./sky130_fd_pr_base__nshort_mm.cor"
+.inc "./sky130_fd_pr_base__pshort_mm.cor"
+.inc "./sky130_fd_pr_base__nlowvt_mm.cor"
+.inc "./sky130_fd_pr_base__plowvt_mm.cor"
+.inc "./sky130_fd_pr_base__phighvt_mm.cor"
+.inc "./sky130_fd_pr_base__nhv_mm.cor"
+.inc "./sky130_fd_pr_base__phv_mm.cor"
+.inc "./sky130_fd_pr_base__nhvnative_mm.cor"
+.inc "./sky130_fd_pr_base__ntvnative_mm.cor"
+* All models
+.inc "models.all"
+* Corner
+.include "fsrf.cor"
+.endl
diff --git a/sky130/custom/scripts/fixspice.py b/sky130/custom/scripts/fixspice.py
new file mode 100755
index 0000000..92cca88
--- /dev/null
+++ b/sky130/custom/scripts/fixspice.py
@@ -0,0 +1,96 @@
+#!/bin/env python3
+#
+# fixspice ---
+#
+# This script fixes problems in the SkyWater SPICE models.  This should be
+# made obsolete by the forthcoming set of models from the foundry, but the
+# script will get the original set working with ngspice.
+#
+# This script is a filter to be run by setting the name of this script as
+# the value to "filter=" for the model install in the s8 Makefile.
+
+import re
+import os
+import sys
+
+def filter(inname, outname):
+
+    # Read input
+    try:
+        with open(inname, 'r') as inFile:
+            spitext = inFile.read()
+            # (Don't) unwrap continuation lines
+            # spilines = spitext.replace('\n+', ' ').splitlines()
+            spilines = spitext.splitlines()
+    except:
+        print('fixspice.py: failed to open ' + fnmIn + ' for reading.', file=sys.stderr)
+        return 1
+
+    # Process input with regexp
+
+    fixedlines = []
+    modified = False
+
+    for line in spilines:
+
+        # Fix 1:  ngspice does not understand the syntax used for the dev/gauss lines,
+        #  so remove them.
+        fixedline = re.sub('dev/gauss[ \t]*=.*$', '', line)
+
+        # Fix 2: Remove references to *_dlc_rotweak
+        # fixedline = re.sub('\+[ \t]*[^ \t_]+_dlc_rotweak', '', fixedline)
+
+        # Fix 2: Remove references to *_[a,p]junction_mult
+        # fixedline = re.sub('\*[ \t]*[^ \t_]+_[ap]junction_mult', '', fixedline)
+
+        fixedlines.append(fixedline)
+        if fixedline != line:
+            modified = True
+
+    # Write output
+    if outname == None:
+        for i in fixedlines:
+            print(i)
+    else:
+        # If the output is a symbolic link but no modifications have been made,
+        # then leave it alone.  If it was modified, then remove the symbolic
+        # link before writing.
+        if os.path.islink(outname):
+            if not modified:
+                return 0
+            else:
+                os.unlink(outname)
+        try:
+            with open(outname, 'w') as outFile:
+                for i in fixedlines:
+                    print(i, file=outFile)
+        except:
+            print('fixspice.py: failed to open ' + outname + ' for writing.', file=sys.stderr)
+            return 1
+
+
+if __name__ == '__main__':
+
+    # This script expects to get one or two arguments.  One argument is
+    # mandatory and is the input file.  The other argument is optional and
+    # is the output file.  The output file and input file may be the same
+    # name, in which case the original input is overwritten.
+
+    options = []
+    arguments = []
+    for item in sys.argv[1:]:
+        if item.find('-', 0) == 0:
+            options.append(item[1:])
+        else:
+            arguments.append(item)
+
+    if len(arguments) > 0:
+        infilename = arguments[0]
+
+    if len(arguments) > 1:
+        outfilename = arguments[1]
+    else:
+        outfilename = None
+
+    result = filter(infilename, outfilename)
+    sys.exit(result)
diff --git a/sky130/custom/scripts/seal_ring_generator/.magicrc b/sky130/custom/scripts/seal_ring_generator/.magicrc
new file mode 100644
index 0000000..2a18665
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/.magicrc
@@ -0,0 +1,3 @@
+scalegrid 1 10
+tech load s8seal_ring.tech
+drc off
diff --git a/sky130/custom/scripts/seal_ring_generator/README b/sky130/custom/scripts/seal_ring_generator/README
new file mode 100644
index 0000000..af48894
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/README
@@ -0,0 +1,37 @@
+# This directory contains a seal ring generator for SkyWater s8 using magic.
+# Because the seal ring contains many layers that do not appear in standard
+# layout editing, they are all specially implemented in the s8seal_ring.tech
+# file in this directory.
+#
+# An example seal ring was generated by SkyWater and imported using magic's
+# gdsquery.sh script.  It was then hand-edited to contain only the bottom
+# quarter.  Then it was saved in .mag databases.
+#
+# The generator script s8_gen_sealring.py calls magic using the s8seal_ring.tech
+# file, and automatically modifies the geometry to stretch to the half width
+# and height of the specified dimensions.  Then the lower-left cells are
+# copied and folded over the centerline to make the complete seal ring.
+# The seal ring is then written out in GDS format.  Then a simplified magic
+# view is generated in the usual user-facing s8 technology file, with the
+# GDS_FILE property pointing to the seal ring GDS.  This layout and GDS can
+# then be imported into a layout.
+#
+# Usage:
+#
+#   s8_gen_sealring.py width height target_dir [-force] [-outer]
+#
+# Where:
+#   width = the full-chip layout width
+#   height = the full-chip layout height
+#   target_dir = location of the full-chip layout
+#
+#   -force = overwrite existing files in the target directory
+#   -outer = width and height represent the seal ring outer edge, not the chip area
+#
+# Results:
+#   Files advSeal_6u_gen.mag and advSeal_6um_gen.gds are generated and placed in
+#   target_dir.  advSeal_6u_gen.mag is an "abstract" view that represents the
+#   seal ring in diffusion and the nikon cross in metal1, and references
+#   the advSeal_6um_gen.gds file in the same directory as a GDS_FILE property.
+#
+
diff --git a/sky130/custom/scripts/seal_ring_generator/generate_gds.tcl b/sky130/custom/scripts/seal_ring_generator/generate_gds.tcl
new file mode 100644
index 0000000..9aedf7b
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/generate_gds.tcl
@@ -0,0 +1,10 @@
+# Tcl script input to magic to generate seal ring GDS
+tech load s8seal_ring -noprompt
+drc off
+load advSeal_6um_gen
+select top cell
+expand
+cif *hier write disable
+cif *array write disable
+gds write advSeal_6um_gen
+quit
diff --git a/sky130/custom/scripts/seal_ring_generator/nikon_sealring_shape.mag b/sky130/custom/scripts/seal_ring_generator/nikon_sealring_shape.mag
new file mode 100644
index 0000000..caf7cc9
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/nikon_sealring_shape.mag
@@ -0,0 +1,130 @@
+magic
+tech s8seal_ring
+timestamp 1584558468
+<< checkpaint >>
+rect 0 0 400 400
+<< type21 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type22 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type23 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type27 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type28 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type30 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type32 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type34 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type35 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type36 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type40 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type41 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type43 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type44 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type46 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type50 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type51 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type56 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type58 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type59 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type88 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type96 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type97 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+<< type98 >>
+rect 175 225 225 320
+rect 80 175 320 225
+rect 175 80 225 175
+use sr_polygon00006  sr_polygon00006_0
+timestamp 1584558468
+transform 1 0 0 0 1 0
+box 0 0 400 400
+use sr_polygon00005  sr_polygon00005_0
+timestamp 1584558468
+transform 1 0 0 0 1 0
+box 0 0 400 400
+use sr_polygon00004  sr_polygon00004_0
+timestamp 1584558468
+transform 1 0 0 0 1 0
+box 0 0 400 400
+use sr_polygon00003  sr_polygon00003_0
+timestamp 1584558468
+transform 1 0 0 0 1 0
+box 0 0 400 400
+use sr_polygon00002  sr_polygon00002_0
+timestamp 1584558468
+transform 1 0 0 0 1 0
+box 0 0 400 400
+use sr_polygon00001  sr_polygon00001_0
+timestamp 1584558468
+transform 1 0 0 0 1 0
+box 0 0 400 400
+use sr_polygon00007  sr_polygon00007_0
+timestamp 1584558468
+transform 1 0 0 0 1 0
+box 0 0 400 400
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/s8_gen_sealring.py b/sky130/custom/scripts/seal_ring_generator/s8_gen_sealring.py
new file mode 100755
index 0000000..d1c3761
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/s8_gen_sealring.py
@@ -0,0 +1,349 @@
+#!/bin/env python3
+#-------------------------------------------------------------------------
+# s8_gen_sealring.py ---  a seal ring generator for SkyWater s8 using magic.
+#
+# Because the seal ring contains many layers that do not appear in standard
+# layout editing, they are all specially implemented in the s8seal_ring.tech
+# file in this directory.
+#
+# An example seal ring was generated by SkyWater and imported using magic's
+# gdsquery.sh script.  It was then hand-edited to contain only the bottom
+# quarter.  Then it was saved in .mag databases.
+#
+# The generator script s8_gen_sealring.py calls magic using the s8seal_ring.tech
+# file, and automatically modifies the geometry to stretch to the half width
+# and height of the specified dimensions.  Then the lower-left cells are
+# copied and folded over the centerline to make the complete seal ring.
+# The seal ring is then written out in GDS format.  Then a simplified magic
+# view is generated in the usual user-facing s8 technology file, with the
+# GDS_FILE property pointing to the seal ring GDS.  This layout and GDS can
+# then be imported into a layout.
+#
+# Usage:
+#
+#   s8_gen_sealring.py width height target_dir [-force] [-outer] [-keep]
+#
+# Where:
+#   width = the full-chip layout width
+#   height = the full-chip layout height
+#   target_dir = location of the full-chip layout
+#
+#   -force = overwrite any existing files at the target
+#   -outer = width and height are the seal ring outer edge, not the chip area
+#   -keep = keep local working directory of results
+#
+# Results:
+#   Files advSeal_6um_gen.mag and advSeal_6um_gen.gds are generated and placed in
+#   target_dir.  advSeal_6um_gen.mag is an "abstract" view that represents the
+#   seal ring in diffusion and the nikon cross in metal1, and references
+#   the advSeal_6um_gen.gds file in the same directory as a GDS_FILE property.
+#-------------------------------------------------------------------------
+
+import subprocess
+import shutil
+import sys
+import os
+import re
+
+def generate_sealring(width, height, target_dir, force, keep):
+
+    # All files of interest are listed below.
+
+    script = 'generate_gds.tcl'
+    tech = 's8seal_ring.tech'
+    corner = 'seal_ring_corner.mag'
+    abstract = 'seal_ring_corner_abstract.mag'
+    slots = 'sealring_slots.mag'
+    array = 'seal_ring_slots_array.mag'
+    nikon = 'nikon_sealring_shape.mag'
+    polygons = ['sr_polygon00007.mag',
+	    'sr_polygon00027.mag', 'sr_polygon00011.mag', 'sr_polygon00028.mag',
+	    'sr_polygon00001.mag', 'sr_polygon00015.mag', 'sr_polygon00031.mag',
+	    'sr_polygon00002.mag', 'sr_polygon00016.mag', 'sr_polygon00032.mag',
+	    'sr_polygon00003.mag', 'sr_polygon00019.mag', 'sr_polygon00035.mag',
+	    'sr_polygon00004.mag', 'sr_polygon00020.mag', 'sr_polygon00036.mag',
+	    'sr_polygon00005.mag', 'sr_polygon00023.mag', 'sr_polygon00039.mag',
+	    'sr_polygon00006.mag', 'sr_polygon00024.mag']
+
+
+    # Create temporary directory
+    if os.path.exists('temp'):
+        print('temp/ directory exists.  Please remove it before running.')
+        sys.exit(0)
+
+    os.makedirs('temp')
+    os.chdir('temp')
+
+    # Copy all .mag files, .magicrc file, and s8seal_ring.tech file to temp/
+    files_to_copy = polygons[:]
+    files_to_copy.append(nikon)
+    files_to_copy.append(slots)
+    files_to_copy.append(array)
+    files_to_copy.append(corner)
+    files_to_copy.append(abstract)
+    files_to_copy.append(tech)
+    files_to_copy.append(script)
+
+    for file in files_to_copy:
+        shutil.copy('../' + file, '.')
+
+    # Seal ring is placed 6um outside of the chip, so add 12um to width and height
+    fwidth = float(width) + 12
+    fheight = float(height) + 12
+
+    dbhwidth = int(fwidth * 100)
+    dbhheight = int(fheight * 100)
+
+    swidth = str(dbhwidth)
+    sheight = str(dbhheight)
+
+    swidthx5 = str(dbhwidth * 5)
+
+    dwidth = str(int(fwidth * 200))
+    dheight = str(int(fheight * 200))
+
+    # Modify every polygon to half width and height
+
+    for file in polygons:
+        with open(file, 'r') as ifile:
+            maglines = ifile.read().splitlines()
+
+        with open(file, 'w') as ofile:
+            for line in maglines:
+                newline = re.sub('51200', swidth, line)
+                newline = re.sub('51210', sheight, newline)
+                # NOTE: polygon 39 is at scale 10, not 2, due to
+                # corner positions of 45 degree angled geometry.
+                newline = re.sub('256000', swidthx5, newline)
+                print(newline, file=ofile)
+
+    # Abstract corner view gets the same treatment
+
+    qwidth = str(int(fwidth * 50))
+    qheight = str(int(fheight * 50))
+
+    with open(abstract, 'r') as ifile:
+        maglines = ifile.read().splitlines()
+
+    with open(abstract, 'w') as ofile:
+        for line in maglines:
+            newline = re.sub('25600', qwidth, line)
+            newline = re.sub('25605', qheight, newline)
+            print(newline, file=ofile)
+
+    # Slots arrays are recalculated to span the width and height
+
+    with open(array, 'r') as ifile:
+        maglines = ifile.read().splitlines()
+
+    slotsX = False
+    with open(array, 'w') as ofile:
+        for line in maglines:
+            newline = line
+            if 'slots_X' in line:
+                slotsX = True
+            elif 'array 0' in line:
+                if slotsX:
+                    nslots = int((fwidth - 25.0) / 25.0) - 1
+                    newline = 'array 0 ' + str(nslots) + ' 5000 0 0 430'
+                else:
+                    nslots = int((fheight - 25.0) / 25.0) - 1
+                    newline = 'array 0 ' + str(nslots) + ' 5000 0 0 430'
+
+            print(newline, file=ofile)
+
+    # Corner cell changes bounding boxes to half width and height.
+
+    with open(corner, 'r') as ifile:
+        maglines = ifile.read().splitlines()
+
+    slotsX = False
+    with open(corner, 'w') as ofile:
+        for line in maglines:
+            newline = re.sub('51200', swidth, line)
+            newline = re.sub('51210', sheight, newline)
+            print(newline, file=ofile)
+
+    # Create a new top-level layout called 'advSeal_6um_gen.mag'
+    # Mirrors uses in X and Y, and adds slots arrays at lower left
+    # and upper right
+
+    with open('advSeal_6um_gen.mag', 'w') as ofile:
+        print('magic', file=ofile)
+        print('tech s8seal_ring', file=ofile)
+        print('magscale 1 2', file=ofile)
+        print('timestamp 1584630000', file=ofile)
+
+        # Lower left original
+        print('use seal_ring_corner seal_ring_corner_0', file=ofile)
+        print('timestamp 1584562315', file=ofile)
+        print('transform 1 0 0 0 1 0', file=ofile)
+        print('box -30480 -30480 ' + swidth + ' ' + sheight, file=ofile)
+
+        # Mirrored in X
+        print('use seal_ring_corner seal_ring_corner_3', file=ofile)
+        print('timestamp 1584562315', file=ofile)
+        print('transform -1 0 ' + dwidth + ' 0 1 0', file=ofile)
+        print('box -30480 -30480 ' + swidth + ' ' + sheight, file=ofile)
+	
+        # Mirrored in Y
+        print('use seal_ring_corner seal_ring_corner_1', file=ofile)
+        print('timestamp 1584562315', file=ofile)
+        print('transform 1 0 0 0 -1 ' + dheight, file=ofile)
+        print('box -30480 -30480 ' + swidth + ' ' + sheight, file=ofile)
+
+        # Mirrored in both X and Y 
+        print('use seal_ring_corner seal_ring_corner_2', file=ofile)
+        print('timestamp 1584562315', file=ofile)
+        print('transform -1 0 ' + dwidth + ' 0 -1 ' + dheight, file=ofile)
+        print('box -30480 -30480 ' + swidth + ' ' + sheight, file=ofile)
+
+        # Lower left slot arrays (bottom and left sides slots)
+        print('use seal_ring_slots_array seal_ring_slots_array_0', file=ofile)
+        print('timestamp 1584629764', file=ofile)
+        print('transform 1 0 0 0 1 0', file=ofile)
+        print('box 285 285 ' + swidth + ' ' + sheight, file=ofile)
+
+        # Upper right slot arrays (top and right sides slots)
+        print('use seal_ring_slots_array seal_ring_slots_array_1', file=ofile)
+        print('timestamp 1584629764', file=ofile)
+        print('transform -1 0 ' + dwidth + ' 0 -1 ' + dheight, file=ofile)
+        print('box 285 285 ' + swidth + ' ' + sheight, file=ofile)
+
+        print('<< end >>', file=ofile)
+    
+    # Create a new abstract layout TO BE called 'advSeal_6um_gen.mag'
+    # This is the view in technology EFS8A.  Since there is already
+    # a cell with this name that is used to generate GDS, the cell
+    # will be called "seal_ring.mag" and copied to "advSeal_6um_gen.mag"
+    # in the target directory.
+
+    xwidth = str(dbhwidth)
+    xheight = str(dbhheight)
+
+    with open('seal_ring.mag', 'w') as ofile:
+        print('magic', file=ofile)
+        print('tech EFS8A', file=ofile)
+        print('timestamp 1584566829', file=ofile)
+
+        # Lower left original
+        print('use seal_ring_corner_abstract seal_ring_corner_abstract_0', file=ofile)
+        print('timestamp 1584566221', file=ofile)
+        print('transform 1 0 0 0 1 0', file=ofile)
+        print('box 0 0 ' + qwidth + ' ' + qheight, file=ofile)
+
+        # Mirrored in X
+        print('use seal_ring_corner_abstract seal_ring_corner_abstract_3', file=ofile)
+        print('timestamp 1584566221', file=ofile)
+        print('transform -1 0 ' + xwidth + ' 0 1 0', file=ofile)
+        print('box 0 0 ' + qwidth + ' ' + qheight, file=ofile)
+	
+        # Mirrored in Y
+        print('use seal_ring_corner_abstract seal_ring_corner_abstract_1', file=ofile)
+        print('timestamp 1584566221', file=ofile)
+        print('transform 1 0 0 0 -1 ' + xheight, file=ofile)
+        print('box 0 0 ' + qwidth + ' ' + qheight, file=ofile)
+
+        # Mirrored in both X and Y 
+        print('use seal_ring_corner_abstract seal_ring_corner_abstract_2', file=ofile)
+        print('timestamp 1584566221', file=ofile)
+        print('transform -1 0 ' + xwidth + ' 0 -1 ' + xheight, file=ofile)
+        print('box 0 0 ' + qwidth + ' ' + qheight, file=ofile)
+
+        print('<< properties >>', file=ofile)
+        print('string LEFview no_prefix', file=ofile)
+        print('string GDS_FILE advSeal_6um_gen.gds', file=ofile)
+        print('string GDS_START 0', file=ofile)
+        print('string FIXED_BBOX 0 0 ' + swidth + ' ' + sheight, file=ofile)
+
+        print('<< end >>', file=ofile)
+
+    # Create the GDS of the seal ring
+
+    mproc = subprocess.run(['magic', '-dnull', '-noconsole',
+	    'generate_gds.tcl'],
+	    stdin = subprocess.DEVNULL, stdout = subprocess.PIPE,
+	    stderr = subprocess.PIPE, universal_newlines = True)
+    if mproc.stdout:
+        for line in mproc.stdout.splitlines():
+            print(line)
+    if mproc.stderr:
+        print('Error message output from magic:')
+        for line in mproc.stderr.splitlines():
+            print(line)
+    if mproc.returncode != 0:
+        print('ERROR:  Magic exited with status ' + str(mproc.returncode))
+
+    # Copy the GDS file and the abstract view to the target directory
+
+    os.chdir('..')
+
+    if not os.path.exists(target_dir):
+        os.makedirs(target_dir)
+
+    print('Installing files to ' + target_dir)
+    if force or not os.path.exists(target_dir + '/advSeal_6um_gen.gds'):
+        shutil.copy('temp/advSeal_6um_gen.gds', target_dir)
+    else:
+        print('ERROR: advSeal_6um_gen.gds already exists at target!  Use -force to overwrite.')
+    if force or not os.path.exists(target_dir + '/advSeal_6um_gen.mag'):
+        shutil.copy('temp/seal_ring.mag', target_dir + '/advSeal_6um_gen.mag')
+    else:
+        print('ERROR: advSeal_6um_gen.mag already exists at target!  Use -force to overwrite.')
+    if force or not os.path.exists(target_dir + '/seal_ring_corner_abstract.mag'):
+        shutil.copy('temp/seal_ring_corner_abstract.mag', target_dir)
+    else:
+        print('ERROR: seal_ring_corner_abstract.mag already exists at target!  Use -force to overwrite.')
+    
+    # Remove the temporary directory and its contents
+
+    if not keep:
+        shutil.rmtree('temp')
+    else:
+        print('Retaining generated files in temp/ directory')
+
+    # Done!
+    print('Done generating files advSeal_6um_gen.gds and advSeal_6um_gen.mag in ' + target_dir)
+    print('Place the seal ring cell in the final layout at (0um, 0um) before generating GDS.')
+    print('The top level layout minus seal ring must have a lower left corner of (6um, 6um)')
+
+# If called as main, run generate_sealring()
+
+if __name__ == '__main__':
+
+    # Divide up command line into options and arguments
+    options = []
+    arguments = []
+    for item in sys.argv[1:]:
+        if item.find('-', 0) == 0:
+            options.append(item)
+        else:
+            arguments.append(item)
+
+    force = True if '-force' in options else False
+    keep = True if '-keep' in options else False
+    outer = True if '-outer' in options else False
+
+    # Need one argument:  path to verilog netlist
+    # If two arguments, then 2nd argument is the output file.
+
+    if len(arguments) == 3:
+        width = arguments[0]
+        height = arguments[1]
+        target_dir = arguments[2]
+
+        # Seal ring is 12um thick, so if "outer" option is used, subtract 12um
+        # from both width and height.
+        if outer:
+            width = str(float(width) - 12.0)
+            height = str(float(height) - 12.0)
+
+        generate_sealring(width, height, target_dir, force, keep)
+    else:
+        print("Usage:  s8_gen_sealring.py <width> <height> <target_dir> [options]")
+        print("Options:")
+        print("   -outer : Width and height are seal ring outer edge, not chip area")
+        print("   -force : Overwrite any existing files at <target_dir>")
+        print("   -keep :  Keep generated files in temp/ directory")
+    
+
diff --git a/sky130/custom/scripts/seal_ring_generator/s8seal_ring.tech b/sky130/custom/scripts/seal_ring_generator/s8seal_ring.tech
new file mode 100644
index 0000000..e5d37f3
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/s8seal_ring.tech
@@ -0,0 +1,506 @@
+tech
+   30
+   s8seal_ring
+end
+
+version
+   version 0.0
+   description "Auto-generated techfile for unknown GDS read-in"
+end
+
+planes
+   plane11
+   plane20
+   plane21
+   plane22
+   plane23
+   plane25
+   plane27
+   plane28
+   plane30
+   plane32
+   plane34
+   plane35
+   plane36
+   plane37
+   plane39
+   plane40
+   plane41
+   plane43
+   plane44
+   plane46
+   plane48
+   plane49
+   plane50
+   plane51
+   plane56
+   plane58
+   plane59
+   plane61
+   plane65
+   plane81
+   plane88
+   plane96
+   plane97
+   plane98
+end
+
+types
+   plane11 type11
+   plane20 type20
+   plane21 type21
+   plane22 type22
+   plane22 type22_22
+   plane23 type23
+   plane25 type25
+   plane27 type27
+   plane28 type28
+   plane30 type30
+   plane32 type32
+   plane34 type34
+   plane35 type35
+   plane36 type36
+   plane37 type37
+   plane39 type39
+   plane40 type40
+   plane41 type41
+   plane43 type43
+   plane44 type44
+   plane46 type46
+   plane48 type48
+   plane49 type49
+   plane50 type50
+   plane51 type51
+   plane56 type56
+   plane58 type58
+   plane59 type59
+   plane61 type61_20
+   plane65 type65_20
+   plane81 type81_1
+   plane81 type81_51
+   plane81 type81_52
+   plane88 type88
+   plane96 type96
+   plane97 type97
+   plane98 type98
+end 
+
+contact
+end
+
+styles
+   styletype mos
+   type11 polysilicon
+   type20 ndiffusion
+   type21 pdiffusion
+   type22 capacitor
+   type22_22 metal1
+   type23 metal2
+   type25 metal3
+   type27 metal4
+   type28 metal5
+   type30 metal6
+   type32 metal7
+   type34 metal8
+   type35 metal9
+   type36 implant1
+   type37 implant2
+   type39 implant3
+   type40 implant4
+   type41 ntransistor
+   type43 ptransistor
+   type44 electrode
+   type46 poly_light
+   type48 mvndiff
+   type49 hvndiff
+   type50 ncontact
+   type51 mvpdiff
+   type56 hvpdiff
+   type58 pcontact
+   type59 poly_resist
+   type61_20 metal10
+   type65_20 mems
+   type81_1 cwell
+   type81_51 cwellnsc
+   type81_52 highvolt_nwell
+   type88 highvolt_pwell
+   type96 nwell
+   type97 pwell
+   type98 poly_light
+end
+
+compose
+end
+
+connect
+end
+
+cifoutput
+style generic
+   scalefactor 1
+
+   layer GDS11 type11
+   labels type11
+   calma 11 0
+
+   layer GDS20 type20
+   labels type20
+   calma 20 0
+
+   layer GDS21 type21
+   labels type21
+   calma 21 0
+
+   layer GDS22 type22
+   labels type22
+   calma 22 0
+
+   layer GDS22_22 type22_22
+   labels type22_22
+   calma 22 22
+
+   layer GDS23 type23
+   labels type23
+   calma 23 0
+
+   layer GDS25 type25
+   labels type25
+   calma 25 0
+
+   layer GDS27 type27
+   labels type27
+   calma 27 0
+
+   layer GDS28 type28
+   labels type28
+   calma 28 0
+
+   layer GDS30 type30
+   labels type30
+   calma 30 0
+
+   layer GDS32 type32
+   labels type32
+   calma 32 0
+
+   layer GDS34 type34
+   labels type34
+   calma 34 0
+
+   layer GDS35 type35
+   labels type35
+   calma 35 0
+
+   layer GDS36 type36
+   labels type36
+   calma 36 0
+
+   layer GDS37 type37
+   labels type37
+   calma 37 0
+
+   layer GDS39 type39
+   labels type39
+   calma 39 0
+
+   layer GDS40 type40
+   labels type40
+   calma 40 0
+
+   layer GDS41 type41
+   labels type41
+   calma 41 0
+
+   layer GDS43 type43
+   labels type43
+   calma 43 0
+
+   layer GDS44 type44
+   labels type44
+   calma 44 0
+
+   layer GDS46 type46
+   labels type46
+   calma 46 0
+
+   layer GDS48 type48
+   labels type48
+   calma 48 0
+
+   layer GDS49 type49
+   labels type49
+   calma 49 0
+
+   layer GDS50 type50
+   labels type50
+   calma 50 0
+
+   layer GDS51 type51
+   labels type51
+   calma 51 0
+
+   layer GDS56 type56
+   labels type56
+   calma 56 0
+
+   layer GDS58 type58
+   labels type58
+   calma 58 0
+
+   layer GDS59 type59
+   labels type59
+   calma 59 0
+
+   layer GDS61_20 type61_20
+   labels type61_20
+   calma 61 20
+
+   layer GDS65_20 type65_20
+   labels type65_20
+   calma 65 20
+
+   layer GDS81_1 type81_1
+   labels type81_1
+   calma 81 1
+
+   layer GDS81_51 type81_51
+   labels type81_51
+   calma 81 51
+
+   layer GDS81_52 type81_52
+   labels type81_52
+   calma 81 52
+
+   layer GDS88 type88
+   labels type88
+   calma 88 0
+
+   layer GDS96 type96
+   labels type96
+   calma 96 0
+
+   layer GDS97 type97
+   labels type97
+   calma 97 0
+
+   layer GDS98 type98
+   labels type98
+   calma 98 0
+
+end
+
+cifinput
+style generic
+   scalefactor 1
+
+   layer type11 GDS11
+   labels GDS11
+
+   layer type20 GDS20
+   labels GDS20
+
+   layer type21 GDS21
+   labels GDS21
+
+   layer type22 GDS22
+   labels GDS22
+
+   layer type22_22 GDS22_22
+   labels GDS22_22
+
+   layer type23 GDS23
+   labels GDS23
+
+   layer type25 GDS25
+   labels GDS25
+
+   layer type27 GDS27
+   labels GDS27
+
+   layer type28 GDS28
+   labels GDS28
+
+   layer type30 GDS30
+   labels GDS30
+
+   layer type32 GDS32
+   labels GDS32
+
+   layer type34 GDS34
+   labels GDS34
+
+   layer type35 GDS35
+   labels GDS35
+
+   layer type36 GDS36
+   labels GDS36
+
+   layer type37 GDS37
+   labels GDS37
+
+   layer type39 GDS39
+   labels GDS39
+
+   layer type40 GDS40
+   labels GDS40
+
+   layer type41 GDS41
+   labels GDS41
+
+   layer type43 GDS43
+   labels GDS43
+
+   layer type44 GDS44
+   labels GDS44
+
+   layer type46 GDS46
+   labels GDS46
+
+   layer type48 GDS48
+   labels GDS48
+
+   layer type49 GDS49
+   labels GDS49
+
+   layer type50 GDS50
+   labels GDS50
+
+   layer type51 GDS51
+   labels GDS51
+
+   layer type56 GDS56
+   labels GDS56
+
+   layer type58 GDS58
+   labels GDS58
+
+   layer type59 GDS59
+   labels GDS59
+
+   layer type61_20 GDS61_20
+   labels GDS61_20
+
+   layer type65_20 GDS65_20
+   labels GDS65_20
+
+   layer type81_1 GDS81_1
+   labels GDS81_1
+
+   layer type81_51 GDS81_51
+   labels GDS81_51
+
+   layer type81_52 GDS81_52
+   labels GDS81_52
+
+   layer type88 GDS88
+   labels GDS88
+
+   layer type96 GDS96
+   labels GDS96
+
+   layer type97 GDS97
+   labels GDS97
+
+   layer type98 GDS98
+   labels GDS98
+
+   calma GDS11 11 0
+   calma GDS20 20 0
+   calma GDS21 21 0
+   calma GDS22 22 0
+   calma GDS22_22 22 22
+   calma GDS23 23 0
+   calma GDS25 25 0
+   calma GDS27 27 0
+   calma GDS28 28 0
+   calma GDS30 30 0
+   calma GDS32 32 0
+   calma GDS34 34 0
+   calma GDS35 35 0
+   calma GDS36 36 0
+   calma GDS37 37 0
+   calma GDS39 39 0
+   calma GDS40 40 0
+   calma GDS41 41 0
+   calma GDS43 43 0
+   calma GDS44 44 0
+   calma GDS46 46 0
+   calma GDS48 48 0
+   calma GDS49 49 0
+   calma GDS50 50 0
+   calma GDS51 51 0
+   calma GDS56 56 0
+   calma GDS58 58 0
+   calma GDS59 59 0
+   calma GDS61_20 61 20
+   calma GDS65_20 65 20
+   calma GDS81_1 81 1
+   calma GDS81_51 81 51
+   calma GDS81_52 81 52
+   calma GDS88 88 0
+   calma GDS96 96 0
+   calma GDS97 97 0
+   calma GDS98 98 0
+end
+
+# mzrouter
+# end
+
+drc
+end
+
+extract
+style generic
+   cscale 1
+   lambda 1
+   step 10
+   sidehalo 0
+
+  planeorder plane11 0
+  planeorder plane20 1
+  planeorder plane21 2
+  planeorder plane22 3
+  planeorder plane23 4
+  planeorder plane25 5
+  planeorder plane27 6
+  planeorder plane28 7
+  planeorder plane30 8
+  planeorder plane32 9
+  planeorder plane34 10
+  planeorder plane35 11
+  planeorder plane36 12
+  planeorder plane37 13
+  planeorder plane39 14
+  planeorder plane40 15
+  planeorder plane41 16
+  planeorder plane43 17
+  planeorder plane44 18
+  planeorder plane46 19
+  planeorder plane48 20
+  planeorder plane49 21
+  planeorder plane50 22
+  planeorder plane51 23
+  planeorder plane56 24
+  planeorder plane58 25
+  planeorder plane59 26
+  planeorder plane61 27
+  planeorder plane65 28
+  planeorder plane81 29
+  planeorder plane88 30
+  planeorder plane96 31
+  planeorder plane97 32
+  planeorder plane98 33
+end
+
+# wiring
+# end
+
+# router
+# end
+
+# plowing
+# end
+
+plot
+  style pnm
+end
diff --git a/sky130/custom/scripts/seal_ring_generator/seal_ring_corner.mag b/sky130/custom/scripts/seal_ring_generator/seal_ring_corner.mag
new file mode 100644
index 0000000..e15ffc8
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/seal_ring_corner.mag
@@ -0,0 +1,68 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584562315
+<< type81_52 >>
+rect 0 20320 20320 51210
+rect 0 0 51200 20320
+use sr_polygon00028  sr_polygon00028_0
+timestamp 1584558827
+transform 1 0 0 0 1 0
+box 650 2369 710 51210
+use sr_polygon00024  sr_polygon00024_0
+timestamp 1584558827
+transform 1 0 0 0 1 0
+box 530 2319 590 51210
+use sr_polygon00020  sr_polygon00020_0
+timestamp 1584558827
+transform 1 0 0 0 1 0
+box 410 2269 470 51210
+use sr_polygon00016  sr_polygon00016_0
+timestamp 1584558827
+transform 1 0 0 0 1 0
+box 290 2219 350 51210
+use sr_polygon00032  sr_polygon00032_0
+timestamp 1584558827
+transform 1 0 0 0 1 0
+box 0 2099 1000 51210
+use sr_polygon00031  sr_polygon00031_0
+timestamp 1584558827
+transform 1 0 0 0 1 0
+box 650 650 51200 2394
+use sr_polygon00027  sr_polygon00027_0
+timestamp 1584558827
+transform 1 0 0 0 1 0
+box 530 530 51200 2344
+use sr_polygon00023  sr_polygon00023_0
+timestamp 1584558827
+transform 1 0 0 0 1 0
+box 410 410 51200 2294
+use sr_polygon00019  sr_polygon00019_0
+timestamp 1584558827
+transform 1 0 0 0 1 0
+box 290 290 51200 2244
+use nikon_sealring_shape  nikon_sealring_shape_0
+timestamp 1584558468
+transform 1 0 200 0 1 200
+box 0 0 800 800
+use sr_polygon00036  sr_polygon00036_0
+timestamp 1584558827
+transform 1 0 0 0 1 0
+box 0 0 1200 51210
+use sr_polygon00015  sr_polygon00015_0
+timestamp 1584558468
+transform 1 0 0 0 1 0
+box 0 0 2099 2099
+use sr_polygon00035  sr_polygon00035_0
+timestamp 1584558827
+transform 1 0 0 0 1 0
+box 0 0 51200 2514
+use sr_polygon00039  sr_polygon00039_0
+timestamp 1584558827
+transform 1 0 0 0 1 0
+box 0 0 51200 2597
+use sr_polygon00011  sr_polygon00011_0
+timestamp 1584558468
+transform 1 0 0 0 1 0
+box -30480 -30480 30480 30480
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/seal_ring_corner_abstract.mag b/sky130/custom/scripts/seal_ring_generator/seal_ring_corner_abstract.mag
new file mode 100644
index 0000000..1477b9c
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/seal_ring_corner_abstract.mag
@@ -0,0 +1,27 @@
+magic
+tech EFS8A
+timestamp 1584566221
+<< psubstratepdiff >>
+rect 145 1110 355 25605
+tri 145 900 355 1110 ne
+tri 355 900 652 1197 sw
+tri 355 652 603 900 ne
+rect 603 652 652 900
+tri 652 652 900 900 sw
+tri 603 355 900 652 ne
+tri 900 355 1197 652 sw
+tri 900 145 1110 355 ne
+rect 1110 145 25600 355
+<< locali >>
+tri 100 383 217 500 se
+rect 217 383 383 500
+tri 383 383 500 500 sw
+rect 100 217 500 383
+tri 100 100 217 217 ne
+rect 217 100 383 217
+tri 383 100 500 217 nw
+<< metal1 >>
+rect 275 325 325 420
+rect 180 275 420 325
+rect 275 180 325 275
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/seal_ring_slots_array.mag b/sky130/custom/scripts/seal_ring_generator/seal_ring_slots_array.mag
new file mode 100644
index 0000000..f38f77c
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/seal_ring_slots_array.mag
@@ -0,0 +1,15 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584629764
+use sealring_slots  sealring_slots_Y
+array 0 7 5000 0 0 430
+timestamp 1584628639
+transform 0 -1 1000 1 0 -7000
+box 9500 285 12200 715
+use sealring_slots  sealring_slots_X
+array 0 7 5000 0 0 430
+timestamp 1584628639
+transform 1 0 -7000 0 1 0
+box 9500 285 12200 715
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sealring_slots.mag b/sky130/custom/scripts/seal_ring_generator/sealring_slots.mag
new file mode 100644
index 0000000..c3ee669
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sealring_slots.mag
@@ -0,0 +1,13 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584628639
+<< checkpaint >>
+rect 6900 285 7100 355
+rect 9500 285 9700 355
+<< type22_22 >>
+rect 12000 645 12200 715
+rect 9500 525 9700 595
+rect 12000 405 12200 475
+rect 9500 285 9700 355
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00001.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00001.mag
new file mode 100644
index 0000000..e7c32b8
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00001.mag
@@ -0,0 +1,21 @@
+magic
+tech s8seal_ring
+timestamp 1584558468
+<< type48 >>
+tri 0 283 117 400 se
+rect 117 320 283 400
+rect 117 283 175 320
+rect 0 225 175 283
+rect 225 283 283 320
+tri 283 283 400 400 sw
+rect 225 225 400 283
+rect 0 175 80 225
+rect 320 175 400 225
+rect 0 117 175 175
+tri 0 0 117 117 ne
+rect 117 80 175 117
+rect 225 117 400 175
+rect 225 80 283 117
+rect 117 0 283 80
+tri 283 0 400 117 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00002.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00002.mag
new file mode 100644
index 0000000..51355fa
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00002.mag
@@ -0,0 +1,21 @@
+magic
+tech s8seal_ring
+timestamp 1584558468
+<< type25 >>
+tri 0 283 117 400 se
+rect 117 320 283 400
+rect 117 283 175 320
+rect 0 225 175 283
+rect 225 283 283 320
+tri 283 283 400 400 sw
+rect 225 225 400 283
+rect 0 175 80 225
+rect 320 175 400 225
+rect 0 117 175 175
+tri 0 0 117 117 ne
+rect 117 80 175 117
+rect 225 117 400 175
+rect 225 80 283 117
+rect 117 0 283 80
+tri 283 0 400 117 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00003.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00003.mag
new file mode 100644
index 0000000..7c2dd29
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00003.mag
@@ -0,0 +1,21 @@
+magic
+tech s8seal_ring
+timestamp 1584558468
+<< type20 >>
+tri 0 283 117 400 se
+rect 117 320 283 400
+rect 117 283 175 320
+rect 0 225 175 283
+rect 225 283 283 320
+tri 283 283 400 400 sw
+rect 225 225 400 283
+rect 0 175 80 225
+rect 320 175 400 225
+rect 0 117 175 175
+tri 0 0 117 117 ne
+rect 117 80 175 117
+rect 225 117 400 175
+rect 225 80 283 117
+rect 117 0 283 80
+tri 283 0 400 117 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00004.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00004.mag
new file mode 100644
index 0000000..7721108
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00004.mag
@@ -0,0 +1,21 @@
+magic
+tech s8seal_ring
+timestamp 1584558468
+<< type39 >>
+tri 0 283 117 400 se
+rect 117 320 283 400
+rect 117 283 175 320
+rect 0 225 175 283
+rect 225 283 283 320
+tri 283 283 400 400 sw
+rect 225 225 400 283
+rect 0 175 80 225
+rect 320 175 400 225
+rect 0 117 175 175
+tri 0 0 117 117 ne
+rect 117 80 175 117
+rect 225 117 400 175
+rect 225 80 283 117
+rect 117 0 283 80
+tri 283 0 400 117 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00005.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00005.mag
new file mode 100644
index 0000000..27e8081
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00005.mag
@@ -0,0 +1,21 @@
+magic
+tech s8seal_ring
+timestamp 1584558468
+<< type11 >>
+tri 0 283 117 400 se
+rect 117 320 283 400
+rect 117 283 175 320
+rect 0 225 175 283
+rect 225 283 283 320
+tri 283 283 400 400 sw
+rect 225 225 400 283
+rect 0 175 80 225
+rect 320 175 400 225
+rect 0 117 175 175
+tri 0 0 117 117 ne
+rect 117 80 175 117
+rect 225 117 400 175
+rect 225 80 283 117
+rect 117 0 283 80
+tri 283 0 400 117 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00006.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00006.mag
new file mode 100644
index 0000000..8b44cb9
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00006.mag
@@ -0,0 +1,21 @@
+magic
+tech s8seal_ring
+timestamp 1584558468
+<< type49 >>
+tri 0 283 117 400 se
+rect 117 320 283 400
+rect 117 283 175 320
+rect 0 225 175 283
+rect 225 283 283 320
+tri 283 283 400 400 sw
+rect 225 225 400 283
+rect 0 175 80 225
+rect 320 175 400 225
+rect 0 117 175 175
+tri 0 0 117 117 ne
+rect 117 80 175 117
+rect 225 117 400 175
+rect 225 80 283 117
+rect 117 0 283 80
+tri 283 0 400 117 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00007.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00007.mag
new file mode 100644
index 0000000..89547c6
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00007.mag
@@ -0,0 +1,21 @@
+magic
+tech s8seal_ring
+timestamp 1584558468
+<< type37 >>
+tri 0 283 117 400 se
+rect 117 320 283 400
+rect 117 283 175 320
+rect 0 225 175 283
+rect 225 283 283 320
+tri 283 283 400 400 sw
+rect 225 225 400 283
+rect 0 175 80 225
+rect 320 175 400 225
+rect 0 117 175 175
+tri 0 0 117 117 ne
+rect 117 80 175 117
+rect 225 117 400 175
+rect 225 80 283 117
+rect 117 0 283 80
+tri 283 0 400 117 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00011.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00011.mag
new file mode 100644
index 0000000..47854ae
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00011.mag
@@ -0,0 +1,99 @@
+magic
+tech s8seal_ring
+magscale 1 10
+timestamp 1584558468
+<< type81_51 >>
+tri -14938 151666 0 152400 se
+tri 0 151666 14938 152400 sw
+tri -29732 149472 -14938 151666 se
+rect -14938 149472 14938 151666
+tri 14938 149472 29732 151666 sw
+tri -44239 145838 -29732 149472 se
+rect -29732 145838 29732 149472
+tri 29732 145838 44239 149472 sw
+tri -58321 140799 -44239 145838 se
+rect -44239 140799 44239 145838
+tri 44239 140799 58321 145838 sw
+tri -71841 134405 -58321 140799 se
+rect -58321 134405 58321 140799
+tri 58321 134405 71841 140799 sw
+tri -84669 126716 -71841 134405 se
+rect -71841 126716 71841 134405
+tri 71841 126716 84669 134405 sw
+tri -96682 117807 -84669 126716 se
+rect -84669 117807 84669 126716
+tri 84669 117807 96682 126716 sw
+tri -107763 107763 -96682 117807 se
+rect -96682 107763 96682 117807
+tri 96682 107763 107763 117807 sw
+tri -117807 96682 -107763 107763 se
+rect -107763 96682 107763 107763
+tri 107763 96682 117807 107763 sw
+tri -126716 84669 -117807 96682 se
+rect -117807 84669 117807 96682
+tri 117807 84669 126716 96682 sw
+tri -134405 71841 -126716 84669 se
+rect -126716 71841 126716 84669
+tri 126716 71841 134405 84669 sw
+tri -140799 58321 -134405 71841 se
+rect -134405 58321 134405 71841
+tri 134405 58321 140799 71841 sw
+tri -145838 44239 -140799 58321 se
+rect -140799 44239 140799 58321
+tri 140799 44239 145838 58321 sw
+tri -149472 29732 -145838 44239 se
+rect -145838 29732 145838 44239
+tri 145838 29732 149472 44239 sw
+tri -151666 14938 -149472 29732 se
+rect -149472 14938 149472 29732
+tri 149472 14938 151666 29732 sw
+tri -152400 0 -151666 14938 se
+tri -152400 -14938 -151666 0 ne
+rect -151666 -14938 151666 14938
+tri 151666 0 152400 14938 sw
+tri 151666 -14938 152400 0 nw
+tri -151666 -29732 -149472 -14938 ne
+rect -149472 -29732 149472 -14938
+tri 149472 -29732 151666 -14938 nw
+tri -149472 -44239 -145838 -29732 ne
+rect -145838 -44239 145838 -29732
+tri 145838 -44239 149472 -29732 nw
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+rect -140799 -58321 140799 -44239
+tri 140799 -58321 145838 -44239 nw
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+rect -134405 -71841 134405 -58321
+tri 134405 -71841 140799 -58321 nw
+tri -134405 -84669 -126716 -71841 ne
+rect -126716 -84669 126716 -71841
+tri 126716 -84669 134405 -71841 nw
+tri -126716 -96682 -117807 -84669 ne
+rect -117807 -96682 117807 -84669
+tri 117807 -96682 126716 -84669 nw
+tri -117807 -107763 -107763 -96682 ne
+rect -107763 -107763 107763 -96682
+tri 107763 -107763 117807 -96682 nw
+tri -107763 -117807 -96682 -107763 ne
+rect -96682 -117807 96682 -107763
+tri 96682 -117807 107763 -107763 nw
+tri -96682 -126716 -84669 -117807 ne
+rect -84669 -126716 84669 -117807
+tri 84669 -126716 96682 -117807 nw
+tri -84669 -134405 -71841 -126716 ne
+rect -71841 -134405 71841 -126716
+tri 71841 -134405 84669 -126716 nw
+tri -71841 -140799 -58321 -134405 ne
+rect -58321 -140799 58321 -134405
+tri 58321 -140799 71841 -134405 nw
+tri -58321 -145838 -44239 -140799 ne
+rect -44239 -145838 44239 -140799
+tri 44239 -145838 58321 -140799 nw
+tri -44239 -149472 -29732 -145838 ne
+rect -29732 -149472 29732 -145838
+tri 29732 -149472 44239 -145838 nw
+tri -29732 -151666 -14938 -149472 ne
+rect -14938 -151666 14938 -149472
+tri 14938 -151666 29732 -149472 nw
+tri -14938 -152400 0 -151666 ne
+tri 0 -152400 14938 -151666 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00015.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00015.mag
new file mode 100644
index 0000000..d91c7fb
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00015.mag
@@ -0,0 +1,15 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584558468
+<< type37 >>
+tri 0 1000 1099 2099 sw
+rect 0 200 200 1000
+tri 200 766 434 1000 nw
+tri 766 766 1000 1000 ne
+tri 200 200 434 434 sw
+tri 766 200 1000 434 se
+rect 1000 200 1099 1000
+rect 0 0 1099 200
+tri 1099 0 2099 1000 sw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00016.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00016.mag
new file mode 100644
index 0000000..7aa89fc
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00016.mag
@@ -0,0 +1,8 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584558827
+<< type65_20 >>
+rect 290 2244 350 51210
+tri 290 2219 350 2244 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00019.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00019.mag
new file mode 100644
index 0000000..b316735
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00019.mag
@@ -0,0 +1,55 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584558827
+<< type65_20 >>
+tri 290 2219 350 2244 se
+tri 350 2219 375 2244 sw
+tri 290 2134 375 2219 ne
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+tri 375 2049 460 2134 ne
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+tri 2160 350 2244 434 sw
+rect 2160 349 51200 350
+tri 2160 290 2219 349 ne
+rect 2219 290 51200 349
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00020.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00020.mag
new file mode 100644
index 0000000..9e328f8
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00020.mag
@@ -0,0 +1,8 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584558827
+<< type65_20 >>
+rect 410 2294 470 51210
+tri 410 2269 470 2294 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00023.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00023.mag
new file mode 100644
index 0000000..fe8335d
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00023.mag
@@ -0,0 +1,54 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584558827
+<< type65_20 >>
+tri 410 2269 470 2294 se
+tri 470 2269 495 2294 sw
+tri 410 2184 495 2269 ne
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+tri 495 2099 580 2184 ne
+tri 580 2099 665 2184 sw
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+tri 2195 410 2269 484 ne
+rect 2269 470 2280 484
+tri 2280 470 2294 484 sw
+rect 2269 410 51200 470
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00024.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00024.mag
new file mode 100644
index 0000000..eb9f364
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00024.mag
@@ -0,0 +1,8 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584558827
+<< type65_20 >>
+rect 530 2344 590 51210
+tri 530 2319 590 2344 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00027.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00027.mag
new file mode 100644
index 0000000..c6d2ad1
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00027.mag
@@ -0,0 +1,53 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584558827
+<< type65_20 >>
+tri 530 2319 590 2344 se
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+tri 2315 530 2319 534 ne
+rect 2319 530 51200 534
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00028.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00028.mag
new file mode 100644
index 0000000..3db918a
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00028.mag
@@ -0,0 +1,8 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584558827
+<< type65_20 >>
+rect 650 2394 710 51210
+tri 650 2369 710 2394 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00031.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00031.mag
new file mode 100644
index 0000000..1eb8648
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00031.mag
@@ -0,0 +1,51 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584558827
+<< type65_20 >>
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+rect 2350 669 51200 710
+tri 2350 650 2369 669 ne
+rect 2369 650 51200 669
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00032.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00032.mag
new file mode 100644
index 0000000..395db17
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00032.mag
@@ -0,0 +1,8 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584558827
+<< type61_20 >>
+rect 0 2514 1000 51210
+tri 0 2099 1000 2514 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00035.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00035.mag
new file mode 100644
index 0000000..934e4e1
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00035.mag
@@ -0,0 +1,13 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584558827
+<< type61_20 >>
+tri 0 2099 1000 2514 se
+tri 1000 2099 1415 2514 sw
+tri 0 684 1415 2099 ne
+tri 1415 1000 2514 2099 sw
+rect 1415 684 51200 1000
+tri 1415 0 2099 684 ne
+rect 2099 0 51200 684
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00036.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00036.mag
new file mode 100644
index 0000000..7e944a4
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00036.mag
@@ -0,0 +1,8 @@
+magic
+tech s8seal_ring
+magscale 1 2
+timestamp 1584558827
+<< type81_1 >>
+rect 0 2597 1200 51210
+tri 0 0 1200 2597 nw
+<< end >>
diff --git a/sky130/custom/scripts/seal_ring_generator/sr_polygon00039.mag b/sky130/custom/scripts/seal_ring_generator/sr_polygon00039.mag
new file mode 100644
index 0000000..24dfe83
--- /dev/null
+++ b/sky130/custom/scripts/seal_ring_generator/sr_polygon00039.mag
@@ -0,0 +1,10 @@
+magic
+tech s8seal_ring
+magscale 1 10
+timestamp 1584558827
+<< type81_1 >>
+tri 2772 6000 6000 12985 se
+tri 6000 6000 12985 12985 sw
+tri 0 0 2772 5999 se
+rect 2772 0 256000 6000
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/README b/sky130/custom/sky130_fd_io/README
new file mode 100644
index 0000000..edffb27
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/README
@@ -0,0 +1,20 @@
+This directory contains standard format files for "power_pads_lib",
+which is an efabless addendum to the SkyWater I/O library "s8iom0".
+
+power_pads_lib does the following:
+
+(1) Changes the orientation of the corner pad from upper-right to
+    lower-left with a wrapper cell called "s8iom0_corner_pad".  Also
+    extends the power buses to make the dimensions of the corner pad
+    multiples of 1um.
+
+(2) Adds a 1um-wide spacer cell to complement the existing 5um-wide
+    spacer cell.
+
+(3) Adds wrappers for all the combinations of power pad base cell +
+    power pad overlay, to create all 12 combinations, for pads with
+    either high- or low-voltage clamps, connecting to one of the six
+    power domains vddio, vdda, vccd, vssio, vssa, or vssd.
+
+"power_pads_lib" is open source copyright 2019 efabless, Inc.
+Released under Apache 2.0 license
diff --git a/sky130/custom/sky130_fd_io/cdl/power_pads_lib.cdl b/sky130/custom/sky130_fd_io/cdl/power_pads_lib.cdl
new file mode 100644
index 0000000..538405f
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/cdl/power_pads_lib.cdl
@@ -0,0 +1,92 @@
+* Power pads library (s8 power pads + overlays)
+* Includes corner and fill cell subcircuits
+
+.SUBCKT s8iom0_vdda_hvc_pad
++ amuxbus_a amuxbus_b drn_hvc src_bdy_hvc
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0_vdda_lvc_pad
++ amuxbus_a amuxbus_b drn_lvc1 drn_lvc2 src_bdy_lvc1 src_bdy_lvc2
++ bdy2_b2b vssi
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0_vddio_hvc_pad
++ amuxbus_a amuxbus_b drn_hvc src_bdy_hvc
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0_vddio_lvc_pad
++ amuxbus_a amuxbus_b drn_lvc1 drn_lvc2 src_bdy_lvc1 src_bdy_lvc2
++ bdy2_b2b vssi
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0_vccd_hvc_pad
++ amuxbus_a amuxbus_b drn_hvc src_bdy_hvc
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0_vccd_lvc_pad
++ amuxbus_a amuxbus_b drn_lvc1 drn_lvc2 src_bdy_lvc1 src_bdy_lvc2
++ bdy2_b2b vssi
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0_vssa_hvc_pad
++ amuxbus_a amuxbus_b drn_hvc src_bdy_hvc
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0_vssa_lvc_pad
++ amuxbus_a amuxbus_b drn_lvc1 drn_lvc2 src_bdy_lvc1 src_bdy_lvc2
++ bdy2_b2b vssi
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0_vssio_hvc_pad
++ amuxbus_a amuxbus_b drn_hvc src_bdy_hvc
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0_vssio_lvc_pad
++ amuxbus_a amuxbus_b drn_lvc1 drn_lvc2 src_bdy_lvc1 src_bdy_lvc2
++ bdy2_b2b vssi
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0_vssd_hvc_pad
++ amuxbus_a amuxbus_b drn_hvc src_bdy_hvc
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0_vssd_lvc_pad
++ amuxbus_a amuxbus_b drn_lvc1 drn_lvc2 src_bdy_lvc1 src_bdy_lvc2
++ bdy2_b2b vssi
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0_corner_pad
++ amuxbus_a amuxbus_b 
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0s8_com_bus_slice
++ amuxbus_a amuxbus_b
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0s8_com_bus_slice_1um
++ amuxbus_a amuxbus_b
++ vssa vdda vswitch vddio_q vcchib vddio vccd vssio vssd vssio_q
+.ENDS
+
+.SUBCKT s8iom0_gpiov2_pad
++ in_h pad_a_noesd_h pad_a_esd_0_h pad_a_esd_1_h
++ pad dm<2> dm<1> dm<0> hld_h_n in inp_dis ib_mode_sel enable_h enable_vdda_h
++ enable_inp_h oe_n tie_hi_esd tie_lo_esd slow vtrip_sel hld_ovr
++ analog_en analog_sel enable_vddio enable_vswitch_h analog_pol out
++ amuxbus_a amuxbus_b vssa vdda vswitch vddio_q vcchib vddio vccd vssio
++ vssd vssio_q
+.ENDS
diff --git a/sky130/custom/sky130_fd_io/gds/power_pads_lib.gds b/sky130/custom/sky130_fd_io/gds/power_pads_lib.gds
new file mode 100644
index 0000000..da0dc4d
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/gds/power_pads_lib.gds
Binary files differ
diff --git a/sky130/custom/sky130_fd_io/lef/power_pads_lib.lef b/sky130/custom/sky130_fd_io/lef/power_pads_lib.lef
new file mode 100644
index 0000000..1ff3c03
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/lef/power_pads_lib.lef
@@ -0,0 +1,5391 @@
+VERSION 5.3 ;
+   NAMESCASESENSITIVE ON ;
+   NOWIREEXTENSIONATPIN ON ;
+   DIVIDERCHAR "/" ;
+   BUSBITCHARS "[]" ;
+UNITS
+   DATABASE MICRONS 1000 ;
+END UNITS
+
+MACRO s8iom0_gpiov2_pad
+   CLASS PAD INOUT ;
+   FOREIGN s8iom0_gpiov2_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 80.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 36.4400 54.0700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 38.7600 51.0900 80.0000 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 52.1450 49.3100 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 54.4650 46.3300 80.0000 49.3100 ;
+      END
+   END amuxbus_b
+   PIN analog_en
+      PORT
+         LAYER met1 ;
+	    RECT 62.4300 -2.0350 62.6900 -0.7300 ;
+      END
+   END analog_en
+   PIN analog_pol
+      PORT
+         LAYER met3 ;
+	    RECT 45.8650 -2.0350 46.1950 34.7700 ;
+      END
+   END analog_pol
+   PIN analog_sel
+      PORT
+         LAYER met2 ;
+	    RECT 30.7500 -2.0350 31.0100 0.2300 ;
+      END
+   END analog_sel
+   PIN dm<2>
+      PORT
+         LAYER met2 ;
+	    RECT 28.4900 -2.0350 28.7500 2.0350 ;
+      END
+   END dm<2>
+   PIN dm<1>
+      PORT
+         LAYER met2 ;
+	    RECT 66.8350 -2.0350 67.0950 -0.8400 ;
+      END
+   END dm<1>
+   PIN dm<0>
+      PORT
+         LAYER met2 ;
+	    RECT 49.8550 -2.0350 50.1150 -1.4900 ;
+      END
+   END dm<0>
+   PIN enable_h
+      PORT
+         LAYER met2 ;
+	    RECT 35.4600 -2.0350 35.7200 -0.4850 ;
+      END
+   END enable_h
+   PIN enable_inp_h
+      PORT
+         LAYER met2 ;
+	    RECT 38.3900 -2.0350 38.6500 1.0550 ;
+      END
+   END enable_inp_h
+   PIN enable_vdda_h
+      PORT
+         LAYER met2 ;
+	    RECT 12.7550 -2.0350 13.0150 3.3150 ;
+      END
+   END enable_vdda_h
+   PIN enable_vddio
+      PORT
+         LAYER met3 ;
+	    RECT 78.5800 -2.0350 78.9100 182.7400 ;
+      END
+   END enable_vddio
+   PIN enable_vswitch_h
+      PORT
+         LAYER met2 ;
+	    RECT 16.3100 -2.0350 16.5700 0.2850 ;
+      END
+   END enable_vswitch_h
+   PIN hld_h_n
+      PORT
+         LAYER met2 ;
+	    RECT 31.8150 -2.0350 32.0750 1.3050 ;
+      END
+   END hld_h_n
+   PIN hld_ovr
+      PORT
+         LAYER met2 ;
+	    RECT 26.6000 -2.0350 26.8600 0.6700 ;
+      END
+   END hld_ovr
+   PIN ib_mode_sel
+      PORT
+         LAYER met2 ;
+	    RECT 5.4200 -2.0350 5.6500 2.4400 ;
+      END
+   END ib_mode_sel
+   PIN in
+      PORT
+         LAYER met3 ;
+	    RECT 79.2400 -2.0350 79.5700 187.5250 ;
+      END
+   END in
+   PIN in_h
+      PORT
+         LAYER met3 ;
+	    RECT 0.4000 -2.0350 1.0200 176.4500 ;
+      END
+   END in_h
+   PIN inp_dis
+      PORT
+         LAYER met2 ;
+	    RECT 45.2450 -2.0350 45.5050 3.0550 ;
+      END
+   END inp_dis
+   PIN oe_n
+      PORT
+         LAYER met2 ;
+	    RECT 3.3750 -2.0350 3.6050 2.4400 ;
+      END
+   END oe_n
+   PIN out
+      PORT
+         LAYER met2 ;
+	    RECT 22.3550 -2.0350 22.6150 4.3900 ;
+      END
+   END out
+   PIN pad
+      PORT
+         LAYER met5 ;
+	    RECT 11.2000 102.5250 73.8000 164.9750 ;
+      END
+   END pad
+   PIN pad_a_esd_0_h
+      PORT
+         LAYER met2 ;
+	    RECT 76.2800 -2.0350 76.9200 0.0200 ;
+      END
+   END pad_a_esd_0_h
+   PIN pad_a_esd_1_h
+      PORT
+         LAYER met2 ;
+	    RECT 68.2750 -2.0350 68.9250 0.2350 ;
+      END
+   END pad_a_esd_1_h
+   PIN pad_a_noesd_h
+      PORT
+         LAYER met3 ;
+	    RECT 62.8200 -2.0350 63.8900 7.6700 ;
+      END
+   END pad_a_noesd_h
+   PIN slow
+      PORT
+         LAYER met2 ;
+	    RECT 77.6100 -2.0350 77.8700 -0.8500 ;
+      END
+   END slow
+   PIN tie_hi_esd
+      PORT
+         LAYER met2 ;
+	    RECT 78.7050 -2.0350 78.9050 -0.8200 ;
+      END
+   END tie_hi_esd
+   PIN tie_lo_esd
+      PORT
+         LAYER met2 ;
+	    RECT 79.7150 -2.0350 79.9150 175.8350 ;
+      END
+   END tie_lo_esd
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.2700 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.2700 11.5000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 78.7300 6.9500 80.0000 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.7300 6.8500 80.0000 11.5000 ;
+      END
+   END vccd
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.2700 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.2700 5.4500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 78.7300 0.1000 80.0000 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.7300 0.0000 80.0000 5.4500 ;
+      END
+   END vcchib
+   PIN vdda
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 0.9650 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 0.9650 16.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 78.9700 13.0000 80.0000 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.9700 12.9000 80.0000 16.3500 ;
+      END
+   END vdda
+   PIN vddio
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.2700 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.2700 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.2700 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.2700 92.9650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 78.7300 68.0000 80.0000 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 78.7300 17.8500 80.0000 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.7300 17.7500 80.0000 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.7300 68.0000 80.0000 92.9650 ;
+      END
+   END vddio
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.2700 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.2700 66.5000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 78.7300 62.1500 80.0000 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.7300 62.0500 80.0000 66.5000 ;
+      END
+   END vddio_q
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8050 1.2700 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 2.6100 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.2700 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 2.6100 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.2700 38.1500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 78.7300 45.7000 80.0000 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 78.7300 34.8050 80.0000 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.7300 49.6100 80.0000 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 47.0900 54.3700 80.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 47.0900 45.7000 80.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.7300 34.7000 80.0000 38.1500 ;
+      END
+   END vssa
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.2700 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.2700 44.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 78.7300 39.6500 80.0000 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.7300 39.5500 80.0000 44.2000 ;
+      END
+   END vssd
+   PIN vssio
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 0.8100 197.9650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.2700 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2700 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.2700 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.9700 173.7500 80.0000 197.9650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 78.7300 23.9000 80.0000 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.7300 23.8000 80.0000 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.7300 173.7500 80.0000 197.9650 ;
+      END
+   END vssio
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.2700 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.2700 60.6500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 78.7300 56.3000 80.0000 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.7300 56.2000 80.0000 60.6500 ;
+      END
+   END vssio_q
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.2700 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.2700 33.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 78.7300 29.9500 80.0000 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 78.7300 29.8500 80.0000 33.3000 ;
+      END
+   END vswitch
+   PIN vtrip_sel
+      PORT
+         LAYER met2 ;
+	    RECT 6.1300 -2.0350 6.3900 -0.4850 ;
+      END
+   END vtrip_sel
+   OBS
+         LAYER li1 ;
+	    RECT -0.1600 -1.8050 80.1600 197.6700 ;
+         LAYER met1 ;
+	    RECT -0.1450 -0.4500 80.1450 197.9650 ;
+	    RECT -0.1450 -1.7750 62.1500 -0.4500 ;
+	    RECT 62.9700 -1.7750 80.1450 -0.4500 ;
+         LAYER met2 ;
+	    RECT 0.2100 176.1150 79.9150 197.9650 ;
+	    RECT 0.2100 4.6700 79.4350 176.1150 ;
+	    RECT 0.2100 3.5950 22.0750 4.6700 ;
+	    RECT 0.2100 2.7200 12.4750 3.5950 ;
+	    RECT 0.2100 -1.7850 3.0950 2.7200 ;
+	    RECT 3.8850 -1.7850 5.1400 2.7200 ;
+	    RECT 5.9300 -0.2050 12.4750 2.7200 ;
+	    RECT 6.6700 -1.7850 12.4750 -0.2050 ;
+	    RECT 13.2950 0.5650 22.0750 3.5950 ;
+	    RECT 13.2950 -1.7850 16.0300 0.5650 ;
+	    RECT 16.8500 -1.7850 22.0750 0.5650 ;
+	    RECT 22.8950 3.3350 79.4350 4.6700 ;
+	    RECT 22.8950 2.3150 44.9650 3.3350 ;
+	    RECT 22.8950 0.9500 28.2100 2.3150 ;
+	    RECT 22.8950 -1.7850 26.3200 0.9500 ;
+	    RECT 27.1400 -1.7850 28.2100 0.9500 ;
+	    RECT 29.0300 1.5850 44.9650 2.3150 ;
+	    RECT 29.0300 0.5100 31.5350 1.5850 ;
+	    RECT 29.0300 -1.7850 30.4700 0.5100 ;
+	    RECT 31.2900 -1.7850 31.5350 0.5100 ;
+	    RECT 32.3550 1.3350 44.9650 1.5850 ;
+	    RECT 32.3550 -0.2050 38.1100 1.3350 ;
+	    RECT 32.3550 -1.7850 35.1800 -0.2050 ;
+	    RECT 36.0000 -1.7850 38.1100 -0.2050 ;
+	    RECT 38.9300 -1.7850 44.9650 1.3350 ;
+	    RECT 45.7850 0.5150 79.4350 3.3350 ;
+	    RECT 45.7850 -0.5600 67.9950 0.5150 ;
+	    RECT 45.7850 -1.2100 66.5550 -0.5600 ;
+	    RECT 45.7850 -1.7850 49.5750 -1.2100 ;
+	    RECT 50.3950 -1.7850 66.5550 -1.2100 ;
+	    RECT 67.3750 -1.7850 67.9950 -0.5600 ;
+	    RECT 69.2050 0.3000 79.4350 0.5150 ;
+	    RECT 69.2050 -1.7850 76.0000 0.3000 ;
+	    RECT 77.2000 -0.5400 79.4350 0.3000 ;
+	    RECT 77.2000 -0.5700 78.4250 -0.5400 ;
+	    RECT 77.2000 -1.7850 77.3300 -0.5700 ;
+	    RECT 78.1500 -1.7850 78.4250 -0.5700 ;
+	    RECT 79.1850 -1.7850 79.4350 -0.5400 ;
+         LAYER met3 ;
+	    RECT 0.4000 187.9250 79.5700 197.9650 ;
+	    RECT 0.4000 183.1400 78.8400 187.9250 ;
+	    RECT 0.4000 176.8500 78.1800 183.1400 ;
+	    RECT 1.4200 35.1700 78.1800 176.8500 ;
+	    RECT 1.4200 -1.7900 45.4650 35.1700 ;
+	    RECT 46.5950 8.0700 78.1800 35.1700 ;
+	    RECT 46.5950 -1.7900 62.4200 8.0700 ;
+	    RECT 64.2900 -1.7900 78.1800 8.0700 ;
+         LAYER met4 ;
+	    RECT 1.6700 173.3500 78.3300 197.9650 ;
+	    RECT 0.9650 93.3650 78.9700 173.3500 ;
+	    RECT 1.6700 67.6000 78.3300 93.3650 ;
+	    RECT 0.9650 66.9000 78.9700 67.6000 ;
+	    RECT 1.6700 61.6500 78.3300 66.9000 ;
+	    RECT 0.9650 61.0500 78.9700 61.6500 ;
+	    RECT 1.6700 55.8000 78.3300 61.0500 ;
+	    RECT 0.9650 55.1000 78.9700 55.8000 ;
+	    RECT 3.0100 54.4700 46.6900 55.1000 ;
+	    RECT 36.8400 50.6900 38.3600 54.4700 ;
+	    RECT 1.6700 49.7100 78.3300 50.6900 ;
+	    RECT 52.5450 46.4300 54.0650 49.7100 ;
+	    RECT 3.0100 45.3000 46.6900 45.9300 ;
+	    RECT 0.9650 44.6000 78.9700 45.3000 ;
+	    RECT 1.6700 39.1500 78.3300 44.6000 ;
+	    RECT 0.9650 38.5500 78.9700 39.1500 ;
+	    RECT 1.6700 34.3000 78.3300 38.5500 ;
+	    RECT 0.9650 33.7000 78.9700 34.3000 ;
+	    RECT 1.6700 29.4500 78.3300 33.7000 ;
+	    RECT 0.9650 28.8500 78.9700 29.4500 ;
+	    RECT 1.6700 23.4000 78.3300 28.8500 ;
+	    RECT 0.9650 22.8000 78.9700 23.4000 ;
+	    RECT 1.6700 17.3500 78.3300 22.8000 ;
+	    RECT 0.9650 16.7500 78.9700 17.3500 ;
+	    RECT 1.3650 12.5000 78.5700 16.7500 ;
+	    RECT 0.9650 11.9000 78.9700 12.5000 ;
+	    RECT 1.6700 6.4500 78.3300 11.9000 ;
+	    RECT 0.9650 5.8500 78.9700 6.4500 ;
+	    RECT 1.6700 -0.4000 78.3300 5.8500 ;
+	    RECT 0.9650 -1.5000 78.9700 -0.4000 ;
+         LAYER met5 ;
+	    RECT 0.0000 166.5750 80.0000 197.9650 ;
+	    RECT 0.0000 100.9250 9.6000 166.5750 ;
+	    RECT 75.4000 100.9250 80.0000 166.5750 ;
+	    RECT 0.0000 94.5500 80.0000 100.9250 ;
+	    RECT 2.8700 16.2500 77.1300 94.5500 ;
+	    RECT 2.5650 13.0000 77.3700 16.2500 ;
+	    RECT 2.8700 0.1000 77.1300 13.0000 ;
+   END
+END s8iom0_gpiov2_pad
+MACRO s8iom0_vddio_lvc_pad
+   CLASS PAD POWER ;
+   FOREIGN s8iom0_vddio_lvc_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 75.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 75.0000 54.0700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 1.2700 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 75.0000 49.3100 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 1.2700 49.3100 ;
+      END
+   END amuxbus_b
+   PIN drn_lvc1
+      PORT
+         LAYER met3 ;
+	    RECT 26.0000 -0.0350 36.8800 20.1850 ;
+      END
+   END drn_lvc1
+   PIN drn_lvc2
+      PORT
+         LAYER met3 ;
+	    RECT 38.3800 -0.0350 49.2550 22.8650 ;
+      END
+   END drn_lvc2
+   PIN src_bdy_lvc1
+      PORT
+         LAYER met2 ;
+	    RECT 0.5000 -0.0350 20.4950 1.4500 ;
+      END
+   END src_bdy_lvc1
+   PIN src_bdy_lvc2
+      PORT
+         LAYER met2 ;
+	    RECT 54.7150 -0.0350 74.7000 3.6250 ;
+      END
+   END src_bdy_lvc2
+   PIN bdy2_b2b
+      PORT
+         LAYER met2 ;
+	    RECT 34.4400 -0.0350 44.4400 0.2900 ;
+      END
+   END bdy2_b2b
+   PIN vssi
+      PORT
+         LAYER met1 ;
+	    RECT 34.3350 0.4750 35.3350 0.9750 ;
+      END
+   END vssi
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 45.7000 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 34.8050 75.0000 38.0500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8050 1.2700 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 49.6100 75.0000 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 75.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 34.7000 75.0000 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 1.2700 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.2700 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.2700 38.1500 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met5 ;
+	    RECT 74.0350 13.0000 75.0000 16.2500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 0.9650 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.0350 12.9000 75.0000 16.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 0.9650 16.3500 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 29.9500 75.0000 33.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.2700 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 29.8500 75.0000 33.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.2700 33.3000 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 62.1500 75.0000 66.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.2700 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 62.0500 75.0000 66.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.2700 66.5000 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 0.1000 75.0000 5.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.2700 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 0.0000 75.0000 5.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.2700 5.4500 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met5 ;
+	    RECT 9.3150 100.1050 65.9550 167.5350 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 50.7550 -0.0350 74.7000 17.7650 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 0.5000 -0.0350 24.5000 17.7650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 68.0000 75.0000 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 17.8500 75.0000 22.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.2700 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.2700 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 17.7500 75.0000 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 68.0000 75.0000 92.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.2700 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.2700 92.9650 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 6.9500 75.0000 11.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.2700 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 6.8500 75.0000 11.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.2700 11.5000 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 23.9000 75.0000 28.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.2700 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 23.8000 75.0000 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2700 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.2700 28.4500 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 39.6500 75.0000 44.1000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.2700 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 39.5500 75.0000 44.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.2700 44.2000 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 56.3000 75.0000 60.5500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.2700 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 56.2000 75.0000 60.6500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.2700 60.6500 ;
+      END
+   END vssio_q
+   OBS
+         LAYER li1 ;
+	    RECT 0.2400 0.9850 74.7550 197.7450 ;
+         LAYER met1 ;
+	    RECT 0.1200 1.2550 74.7850 197.8050 ;
+	    RECT 0.1200 0.1950 34.0550 1.2550 ;
+	    RECT 35.6150 0.1950 74.7850 1.2550 ;
+	    RECT 0.1200 -0.0350 74.7850 0.1950 ;
+         LAYER met2 ;
+	    RECT 0.4900 3.9050 74.7000 194.3950 ;
+	    RECT 0.4900 1.7300 54.4350 3.9050 ;
+	    RECT 20.7750 0.5700 54.4350 1.7300 ;
+	    RECT 20.7750 -0.0350 34.1600 0.5700 ;
+	    RECT 44.7200 -0.0350 54.4350 0.5700 ;
+         LAYER met3 ;
+	    RECT 0.4900 23.2650 74.7000 189.4800 ;
+	    RECT 0.4900 20.5850 37.9800 23.2650 ;
+	    RECT 0.4900 18.1650 25.6000 20.5850 ;
+	    RECT 24.9000 0.0000 25.6000 18.1650 ;
+	    RECT 37.2800 0.0000 37.9800 20.5850 ;
+	    RECT 49.6550 18.1650 74.7000 23.2650 ;
+	    RECT 49.6550 0.0000 50.3550 18.1650 ;
+         LAYER met4 ;
+	    RECT 1.6700 173.3500 73.3300 197.9650 ;
+	    RECT 0.9650 93.3650 74.0350 173.3500 ;
+	    RECT 1.6700 67.6000 73.3300 93.3650 ;
+	    RECT 0.9650 66.9000 74.0350 67.6000 ;
+	    RECT 1.6700 61.6500 73.3300 66.9000 ;
+	    RECT 0.9650 61.0500 74.0350 61.6500 ;
+	    RECT 1.6700 55.8000 73.3300 61.0500 ;
+	    RECT 0.9650 55.1000 74.0350 55.8000 ;
+	    RECT 1.6700 49.7100 73.3300 50.6900 ;
+	    RECT 0.9650 44.6000 74.0350 45.3000 ;
+	    RECT 1.6700 39.1500 73.3300 44.6000 ;
+	    RECT 0.9650 38.5500 74.0350 39.1500 ;
+	    RECT 1.6700 34.3000 73.3300 38.5500 ;
+	    RECT 0.9650 33.7000 74.0350 34.3000 ;
+	    RECT 1.6700 29.4500 73.3300 33.7000 ;
+	    RECT 0.9650 28.8500 74.0350 29.4500 ;
+	    RECT 1.6700 23.4000 73.3300 28.8500 ;
+	    RECT 0.9650 22.8000 74.0350 23.4000 ;
+	    RECT 1.6700 17.3500 73.3300 22.8000 ;
+	    RECT 0.9650 16.7500 74.0350 17.3500 ;
+	    RECT 1.3650 12.5000 73.6350 16.7500 ;
+	    RECT 0.9650 11.9000 74.0350 12.5000 ;
+	    RECT 1.6700 6.4500 73.3300 11.9000 ;
+	    RECT 0.9650 5.8500 74.0350 6.4500 ;
+	    RECT 1.6700 0.0000 73.3300 5.8500 ;
+         LAYER met5 ;
+	    RECT 0.0000 169.1350 75.0000 197.9650 ;
+	    RECT 0.0000 98.5050 7.7150 169.1350 ;
+	    RECT 67.5550 98.5050 75.0000 169.1350 ;
+	    RECT 0.0000 94.5500 75.0000 98.5050 ;
+	    RECT 2.8700 16.2500 72.1300 94.5500 ;
+	    RECT 2.5650 13.0000 72.4350 16.2500 ;
+	    RECT 2.8700 0.1000 72.1300 13.0000 ;
+   END
+END s8iom0_vddio_lvc_pad
+MACRO s8iom0_vddio_hvc_pad
+   CLASS PAD POWER ;
+   FOREIGN s8iom0_vddio_hvc_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 75.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 75.0000 54.0700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 1.2700 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 75.0000 49.3100 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 1.2700 49.3100 ;
+      END
+   END amuxbus_b
+   PIN drn_hvc
+      PORT
+         LAYER met2 ;
+	    RECT 50.3900 -2.0350 74.2900 23.6250 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 37.8900 -2.0350 48.8900 10.3450 ;
+      END
+   END drn_hvc
+   PIN src_bdy_hvc
+      PORT
+         LAYER met2 ;
+	    RECT 0.4950 -2.0350 24.3950 0.0200 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 25.8950 -2.0350 36.8950 10.3900 ;
+      END
+   END src_bdy_hvc
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 45.7000 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 34.8050 75.0000 38.0500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8050 1.2700 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 49.6100 75.0000 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 75.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 34.7000 75.0000 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 1.2700 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.2700 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.2700 38.1500 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met5 ;
+	    RECT 74.0350 13.0000 75.0000 16.2500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 0.9650 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.0350 12.9000 75.0000 16.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 0.9650 16.3500 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 29.9500 75.0000 33.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.2700 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 29.8500 75.0000 33.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.2700 33.3000 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 62.1500 75.0000 66.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.2700 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 62.0500 75.0000 66.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.2700 66.5000 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 0.1000 75.0000 5.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.2700 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 0.0000 75.0000 5.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.2700 5.4500 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met5 ;
+	    RECT 6.1000 101.9750 68.8000 164.5900 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 50.3900 -2.0350 74.2900 88.1500 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 0.4950 -2.0350 24.3950 30.4800 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 68.0000 75.0000 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 17.8500 75.0000 22.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.2700 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.2700 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 17.7500 75.0000 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 68.0000 75.0000 92.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.2700 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.2700 92.9650 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 6.9500 75.0000 11.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.2700 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 6.8500 75.0000 11.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.2700 11.5000 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2050 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.2250 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 23.9000 75.0000 28.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.2700 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 23.8000 75.0000 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2700 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.2700 28.4500 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 39.6500 75.0000 44.1000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.2700 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 39.5500 75.0000 44.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.2700 44.2000 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 56.3000 75.0000 60.5500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.2700 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 56.2000 75.0000 60.6500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.2700 60.6500 ;
+      END
+   END vssio_q
+   OBS
+         LAYER li1 ;
+	    RECT 1.0700 -1.0350 72.7750 197.6600 ;
+         LAYER met1 ;
+	    RECT 0.1850 -1.0650 73.6200 197.6900 ;
+         LAYER met2 ;
+	    RECT 0.2650 23.9050 74.2900 193.0400 ;
+	    RECT 0.2650 0.3000 50.1100 23.9050 ;
+	    RECT 24.6750 -2.0350 50.1100 0.3000 ;
+         LAYER met3 ;
+	    RECT 0.2400 88.5500 74.2900 197.9650 ;
+	    RECT 0.2400 30.8800 49.9900 88.5500 ;
+	    RECT 24.7950 10.7900 49.9900 30.8800 ;
+	    RECT 24.7950 10.3450 25.4950 10.7900 ;
+	    RECT 37.2950 10.7450 49.9900 10.7900 ;
+	    RECT 37.2950 10.3450 37.4900 10.7450 ;
+	    RECT 49.2900 10.3450 49.9900 10.7450 ;
+         LAYER met4 ;
+	    RECT 1.6700 173.3500 73.3300 197.9650 ;
+	    RECT 0.9650 93.3650 74.0350 173.3500 ;
+	    RECT 1.6700 67.6000 73.3300 93.3650 ;
+	    RECT 0.9650 66.9000 74.0350 67.6000 ;
+	    RECT 1.6700 61.6500 73.3300 66.9000 ;
+	    RECT 0.9650 61.0500 74.0350 61.6500 ;
+	    RECT 1.6700 55.8000 73.3300 61.0500 ;
+	    RECT 0.9650 55.1000 74.0350 55.8000 ;
+	    RECT 1.6700 49.7100 73.3300 50.6900 ;
+	    RECT 0.9650 44.6000 74.0350 45.3000 ;
+	    RECT 1.6700 39.1500 73.3300 44.6000 ;
+	    RECT 0.9650 38.5500 74.0350 39.1500 ;
+	    RECT 1.6700 34.3000 73.3300 38.5500 ;
+	    RECT 0.9650 33.7000 74.0350 34.3000 ;
+	    RECT 1.6700 29.4500 73.3300 33.7000 ;
+	    RECT 0.9650 28.8500 74.0350 29.4500 ;
+	    RECT 1.6700 23.4000 73.3300 28.8500 ;
+	    RECT 0.9650 22.8000 74.0350 23.4000 ;
+	    RECT 1.6700 17.3500 73.3300 22.8000 ;
+	    RECT 0.9650 16.7500 74.0350 17.3500 ;
+	    RECT 1.3650 12.5000 73.6350 16.7500 ;
+	    RECT 0.9650 11.9000 74.0350 12.5000 ;
+	    RECT 1.6700 6.4500 73.3300 11.9000 ;
+	    RECT 0.9650 5.8500 74.0350 6.4500 ;
+	    RECT 1.6700 0.0000 73.3300 5.8500 ;
+         LAYER met5 ;
+	    RECT 0.0000 166.1900 75.0000 197.9650 ;
+	    RECT 0.0000 100.3750 4.5000 166.1900 ;
+	    RECT 70.4000 100.3750 75.0000 166.1900 ;
+	    RECT 0.0000 94.5500 75.0000 100.3750 ;
+	    RECT 2.8700 16.2500 72.1300 94.5500 ;
+	    RECT 2.5650 13.0000 72.4350 16.2500 ;
+	    RECT 2.8700 0.1000 72.1300 13.0000 ;
+   END
+END s8iom0_vddio_hvc_pad
+MACRO s8iom0_vccd_hvc_pad
+   CLASS PAD POWER ;
+   FOREIGN s8iom0_vccd_hvc_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 75.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 75.0000 54.0700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 1.2700 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 75.0000 49.3100 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 1.2700 49.3100 ;
+      END
+   END amuxbus_b
+   PIN drn_hvc
+      PORT
+         LAYER met2 ;
+	    RECT 50.3900 -2.0350 74.2900 23.6250 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 37.8900 -2.0350 48.8900 10.3450 ;
+      END
+   END drn_hvc
+   PIN src_bdy_hvc
+      PORT
+         LAYER met2 ;
+	    RECT 0.4950 -2.0350 24.3950 0.0200 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 25.8950 -2.0350 36.8950 10.3900 ;
+      END
+   END src_bdy_hvc
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 45.7000 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 34.8050 75.0000 38.0500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8050 1.2700 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 49.6100 75.0000 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 75.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 34.7000 75.0000 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 1.2700 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.2700 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.2700 38.1500 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met5 ;
+	    RECT 74.0350 13.0000 75.0000 16.2500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 0.9650 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.0350 12.9000 75.0000 16.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 0.9650 16.3500 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 29.9500 75.0000 33.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.2700 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 29.8500 75.0000 33.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.2700 33.3000 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 62.1500 75.0000 66.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.2700 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 62.0500 75.0000 66.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.2700 66.5000 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 0.1000 75.0000 5.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.2700 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 0.0000 75.0000 5.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.2700 5.4500 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 68.0000 75.0000 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 17.8500 75.0000 22.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.2700 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.2700 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 17.7500 75.0000 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 68.0000 75.0000 92.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.2700 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.2700 92.9650 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 6.1000 101.9750 68.8000 164.5900 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 50.3900 -2.0350 74.2900 6.8650 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 0.4950 -2.0350 24.3950 6.8650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 6.9500 75.0000 11.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.2700 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 6.8500 75.0000 11.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.2700 11.5000 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2050 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.2250 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 23.9000 75.0000 28.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.2700 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 23.8000 75.0000 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2700 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.2700 28.4500 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 39.6500 75.0000 44.1000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.2700 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 39.5500 75.0000 44.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.2700 44.2000 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 56.3000 75.0000 60.5500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.2700 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 56.2000 75.0000 60.6500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.2700 60.6500 ;
+      END
+   END vssio_q
+   OBS
+         LAYER li1 ;
+	    RECT 1.0700 -1.0350 72.7750 197.6600 ;
+         LAYER met1 ;
+	    RECT 0.1850 -1.0650 73.6200 197.6900 ;
+         LAYER met2 ;
+	    RECT 0.2650 23.9050 74.2900 193.0400 ;
+	    RECT 0.2650 0.3000 50.1100 23.9050 ;
+	    RECT 24.6750 -2.0350 50.1100 0.3000 ;
+         LAYER met3 ;
+	    RECT 0.2400 10.7900 74.2900 197.9650 ;
+	    RECT 0.2400 7.2650 25.4950 10.7900 ;
+	    RECT 24.7950 6.8650 25.4950 7.2650 ;
+	    RECT 37.2950 10.7450 74.2900 10.7900 ;
+	    RECT 37.2950 6.8650 37.4900 10.7450 ;
+	    RECT 49.2900 7.2650 74.2900 10.7450 ;
+	    RECT 49.2900 6.8650 49.9900 7.2650 ;
+         LAYER met4 ;
+	    RECT 1.6700 173.3500 73.3300 197.9650 ;
+	    RECT 0.9650 93.3650 74.0350 173.3500 ;
+	    RECT 1.6700 67.6000 73.3300 93.3650 ;
+	    RECT 0.9650 66.9000 74.0350 67.6000 ;
+	    RECT 1.6700 61.6500 73.3300 66.9000 ;
+	    RECT 0.9650 61.0500 74.0350 61.6500 ;
+	    RECT 1.6700 55.8000 73.3300 61.0500 ;
+	    RECT 0.9650 55.1000 74.0350 55.8000 ;
+	    RECT 1.6700 49.7100 73.3300 50.6900 ;
+	    RECT 0.9650 44.6000 74.0350 45.3000 ;
+	    RECT 1.6700 39.1500 73.3300 44.6000 ;
+	    RECT 0.9650 38.5500 74.0350 39.1500 ;
+	    RECT 1.6700 34.3000 73.3300 38.5500 ;
+	    RECT 0.9650 33.7000 74.0350 34.3000 ;
+	    RECT 1.6700 29.4500 73.3300 33.7000 ;
+	    RECT 0.9650 28.8500 74.0350 29.4500 ;
+	    RECT 1.6700 23.4000 73.3300 28.8500 ;
+	    RECT 0.9650 22.8000 74.0350 23.4000 ;
+	    RECT 1.6700 17.3500 73.3300 22.8000 ;
+	    RECT 0.9650 16.7500 74.0350 17.3500 ;
+	    RECT 1.3650 12.5000 73.6350 16.7500 ;
+	    RECT 0.9650 11.9000 74.0350 12.5000 ;
+	    RECT 1.6700 6.4500 73.3300 11.9000 ;
+	    RECT 0.9650 5.8500 74.0350 6.4500 ;
+	    RECT 1.6700 0.0000 73.3300 5.8500 ;
+         LAYER met5 ;
+	    RECT 0.0000 166.1900 75.0000 197.9650 ;
+	    RECT 0.0000 100.3750 4.5000 166.1900 ;
+	    RECT 70.4000 100.3750 75.0000 166.1900 ;
+	    RECT 0.0000 94.5500 75.0000 100.3750 ;
+	    RECT 2.8700 16.2500 72.1300 94.5500 ;
+	    RECT 2.5650 13.0000 72.4350 16.2500 ;
+	    RECT 2.8700 0.1000 72.1300 13.0000 ;
+   END
+END s8iom0_vccd_hvc_pad
+MACRO s8iom0_vccd_lvc_pad
+   CLASS PAD POWER ;
+   FOREIGN s8iom0_vccd_lvc_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 75.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 75.0000 54.0700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 1.2700 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 75.0000 49.3100 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 1.2700 49.3100 ;
+      END
+   END amuxbus_b
+   PIN drn_lvc1
+      PORT
+         LAYER met3 ;
+	    RECT 26.0000 -0.0350 36.8800 20.1850 ;
+      END
+   END drn_lvc1
+   PIN drn_lvc2
+      PORT
+         LAYER met3 ;
+	    RECT 38.3800 -0.0350 49.2550 22.8650 ;
+      END
+   END drn_lvc2
+   PIN src_bdy_lvc1
+      PORT
+         LAYER met2 ;
+	    RECT 0.5000 -0.0350 20.4950 1.4500 ;
+      END
+   END src_bdy_lvc1
+   PIN src_bdy_lvc2
+      PORT
+         LAYER met2 ;
+	    RECT 54.7150 -0.0350 74.7000 3.6250 ;
+      END
+   END src_bdy_lvc2
+   PIN bdy2_b2b
+      PORT
+         LAYER met2 ;
+	    RECT 34.4400 -0.0350 44.4400 0.2900 ;
+      END
+   END bdy2_b2b
+   PIN vssi
+      PORT
+         LAYER met1 ;
+	    RECT 34.3350 0.4750 35.3350 0.9750 ;
+      END
+   END vssi
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 45.7000 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 34.8050 75.0000 38.0500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8050 1.2700 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 49.6100 75.0000 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 75.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 34.7000 75.0000 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 1.2700 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.2700 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.2700 38.1500 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met5 ;
+	    RECT 74.0350 13.0000 75.0000 16.2500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 0.9650 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.0350 12.9000 75.0000 16.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 0.9650 16.3500 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 29.9500 75.0000 33.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.2700 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 29.8500 75.0000 33.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.2700 33.3000 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 62.1500 75.0000 66.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.2700 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 62.0500 75.0000 66.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.2700 66.5000 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 0.1000 75.0000 5.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.2700 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 0.0000 75.0000 5.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.2700 5.4500 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 68.0000 75.0000 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 17.8500 75.0000 22.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.2700 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.2700 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 17.7500 75.0000 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 68.0000 75.0000 92.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.2700 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.2700 92.9650 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 9.3150 100.1050 65.9550 167.5350 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 50.7550 -0.0350 74.7000 6.8650 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 0.5000 -0.0350 24.5000 6.8650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 6.9500 75.0000 11.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.2700 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 6.8500 75.0000 11.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.2700 11.5000 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met4 ;
+	    RECT 74.2250 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2050 197.9650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 23.9000 75.0000 28.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.2700 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 23.8000 75.0000 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2700 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.2700 28.4500 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 39.6500 75.0000 44.1000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.2700 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 39.5500 75.0000 44.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.2700 44.2000 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 56.3000 75.0000 60.5500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.2700 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 56.2000 75.0000 60.6500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.2700 60.6500 ;
+      END
+   END vssio_q
+   OBS
+         LAYER li1 ;
+	    RECT 0.2400 0.9850 74.7550 197.7450 ;
+         LAYER met1 ;
+	    RECT 0.1200 1.2550 74.7850 197.8050 ;
+	    RECT 0.1200 0.1950 34.0550 1.2550 ;
+	    RECT 35.6150 0.1950 74.7850 1.2550 ;
+	    RECT 0.1200 -0.0350 74.7850 0.1950 ;
+         LAYER met2 ;
+	    RECT 0.4900 3.9050 74.7000 194.3950 ;
+	    RECT 0.4900 1.7300 54.4350 3.9050 ;
+	    RECT 20.7750 0.5700 54.4350 1.7300 ;
+	    RECT 20.7750 -0.0350 34.1600 0.5700 ;
+	    RECT 44.7200 -0.0350 54.4350 0.5700 ;
+         LAYER met3 ;
+	    RECT 0.4900 23.2650 74.7000 189.4800 ;
+	    RECT 0.4900 20.5850 37.9800 23.2650 ;
+	    RECT 0.4900 7.2650 25.6000 20.5850 ;
+	    RECT 24.9000 0.0000 25.6000 7.2650 ;
+	    RECT 37.2800 0.0000 37.9800 20.5850 ;
+	    RECT 49.6550 7.2650 74.7000 23.2650 ;
+	    RECT 49.6550 0.0000 50.3550 7.2650 ;
+         LAYER met4 ;
+	    RECT 1.6700 173.3500 73.3300 197.9650 ;
+	    RECT 0.9650 93.3650 74.0350 173.3500 ;
+	    RECT 1.6700 67.6000 73.3300 93.3650 ;
+	    RECT 0.9650 66.9000 74.0350 67.6000 ;
+	    RECT 1.6700 61.6500 73.3300 66.9000 ;
+	    RECT 0.9650 61.0500 74.0350 61.6500 ;
+	    RECT 1.6700 55.8000 73.3300 61.0500 ;
+	    RECT 0.9650 55.1000 74.0350 55.8000 ;
+	    RECT 1.6700 49.7100 73.3300 50.6900 ;
+	    RECT 0.9650 44.6000 74.0350 45.3000 ;
+	    RECT 1.6700 39.1500 73.3300 44.6000 ;
+	    RECT 0.9650 38.5500 74.0350 39.1500 ;
+	    RECT 1.6700 34.3000 73.3300 38.5500 ;
+	    RECT 0.9650 33.7000 74.0350 34.3000 ;
+	    RECT 1.6700 29.4500 73.3300 33.7000 ;
+	    RECT 0.9650 28.8500 74.0350 29.4500 ;
+	    RECT 1.6700 23.4000 73.3300 28.8500 ;
+	    RECT 0.9650 22.8000 74.0350 23.4000 ;
+	    RECT 1.6700 17.3500 73.3300 22.8000 ;
+	    RECT 0.9650 16.7500 74.0350 17.3500 ;
+	    RECT 1.3650 12.5000 73.6350 16.7500 ;
+	    RECT 0.9650 11.9000 74.0350 12.5000 ;
+	    RECT 1.6700 6.4500 73.3300 11.9000 ;
+	    RECT 0.9650 5.8500 74.0350 6.4500 ;
+	    RECT 1.6700 0.0000 73.3300 5.8500 ;
+         LAYER met5 ;
+	    RECT 0.0000 169.1350 75.0000 197.9650 ;
+	    RECT 0.0000 98.5050 7.7150 169.1350 ;
+	    RECT 67.5550 98.5050 75.0000 169.1350 ;
+	    RECT 0.0000 94.5500 75.0000 98.5050 ;
+	    RECT 2.8700 16.2500 72.1300 94.5500 ;
+	    RECT 2.5650 13.0000 72.4350 16.2500 ;
+	    RECT 2.8700 0.1000 72.1300 13.0000 ;
+   END
+END s8iom0_vccd_lvc_pad
+MACRO s8iom0_vdda_hvc_pad
+   CLASS PAD POWER ;
+   FOREIGN s8iom0_vdda_hvc_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 75.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 75.0000 54.0700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 1.2700 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 75.0000 49.3100 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 1.2700 49.3100 ;
+      END
+   END amuxbus_b
+   PIN drn_hvc
+      PORT
+         LAYER met2 ;
+	    RECT 50.3900 -2.0350 74.2900 23.6250 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 37.8900 -2.0350 48.8900 10.3450 ;
+      END
+   END drn_hvc
+   PIN src_bdy_hvc
+      PORT
+         LAYER met2 ;
+	    RECT 0.4950 -2.0350 24.3950 0.0200 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 25.8950 -2.0350 36.8950 10.3900 ;
+      END
+   END src_bdy_hvc
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 45.7000 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 34.8050 75.0000 38.0500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8050 1.2700 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 49.6100 75.0000 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 75.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 34.7000 75.0000 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 1.2700 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.2700 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.2700 38.1500 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met5 ;
+	    RECT 6.1000 101.9750 68.8000 164.5900 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 50.3900 -2.0350 74.2900 6.8650 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 0.4950 -2.0350 24.3950 6.8650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 74.0350 13.0000 75.0000 16.2500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 0.9650 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.0350 12.9000 75.0000 16.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 0.9650 16.3500 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 29.9500 75.0000 33.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.2700 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 29.8500 75.0000 33.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.2700 33.3000 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 62.1500 75.0000 66.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.2700 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 62.0500 75.0000 66.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.2700 66.5000 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 0.1000 75.0000 5.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.2700 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 0.0000 75.0000 5.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.2700 5.4500 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 68.0000 75.0000 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 17.8500 75.0000 22.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.2700 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.2700 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 17.7500 75.0000 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 68.0000 75.0000 92.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.2700 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.2700 92.9650 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 6.9500 75.0000 11.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.2700 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 6.8500 75.0000 11.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.2700 11.5000 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met4 ;
+	    RECT 74.2250 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2050 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.6300 189.5650 0.6400 189.5750 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.3600 189.5650 74.3700 189.5750 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 23.9000 75.0000 28.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.2700 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 23.8000 75.0000 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2700 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.2700 28.4500 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 39.6500 75.0000 44.1000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.2700 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 39.5500 75.0000 44.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.2700 44.2000 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 56.3000 75.0000 60.5500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.2700 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 56.2000 75.0000 60.6500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.2700 60.6500 ;
+      END
+   END vssio_q
+   OBS
+         LAYER li1 ;
+	    RECT 1.0700 -1.0350 72.7750 197.6600 ;
+         LAYER met1 ;
+	    RECT 0.1850 -1.0650 73.6200 197.6900 ;
+         LAYER met2 ;
+	    RECT 0.2650 23.9050 74.2900 193.0400 ;
+	    RECT 0.2650 0.3000 50.1100 23.9050 ;
+	    RECT 24.6750 -2.0350 50.1100 0.3000 ;
+         LAYER met3 ;
+	    RECT 0.2400 10.7900 74.6550 197.9650 ;
+	    RECT 0.2400 7.2650 25.4950 10.7900 ;
+	    RECT 24.7950 6.8550 25.4950 7.2650 ;
+	    RECT 37.2950 10.7450 74.6550 10.7900 ;
+	    RECT 37.2950 6.8550 37.4900 10.7450 ;
+	    RECT 49.2900 7.2650 74.6550 10.7450 ;
+	    RECT 49.2900 6.8550 49.9900 7.2650 ;
+         LAYER met4 ;
+	    RECT 1.6700 173.3500 73.3300 197.9650 ;
+	    RECT 0.9650 93.3650 74.0350 173.3500 ;
+	    RECT 1.6700 67.6000 73.3300 93.3650 ;
+	    RECT 0.9650 66.9000 74.0350 67.6000 ;
+	    RECT 1.6700 61.6500 73.3300 66.9000 ;
+	    RECT 0.9650 61.0500 74.0350 61.6500 ;
+	    RECT 1.6700 55.8000 73.3300 61.0500 ;
+	    RECT 0.9650 55.1000 74.0350 55.8000 ;
+	    RECT 1.6700 49.7100 73.3300 50.6900 ;
+	    RECT 0.9650 44.6000 74.0350 45.3000 ;
+	    RECT 1.6700 39.1500 73.3300 44.6000 ;
+	    RECT 0.9650 38.5500 74.0350 39.1500 ;
+	    RECT 1.6700 34.3000 73.3300 38.5500 ;
+	    RECT 0.9650 33.7000 74.0350 34.3000 ;
+	    RECT 1.6700 29.4500 73.3300 33.7000 ;
+	    RECT 0.9650 28.8500 74.0350 29.4500 ;
+	    RECT 1.6700 23.4000 73.3300 28.8500 ;
+	    RECT 0.9650 22.8000 74.0350 23.4000 ;
+	    RECT 1.6700 17.3500 73.3300 22.8000 ;
+	    RECT 0.9650 16.7500 74.0350 17.3500 ;
+	    RECT 1.3650 12.5000 73.6350 16.7500 ;
+	    RECT 0.9650 11.9000 74.0350 12.5000 ;
+	    RECT 1.6700 6.4500 73.3300 11.9000 ;
+	    RECT 0.9650 5.8500 74.0350 6.4500 ;
+	    RECT 1.6700 0.0000 73.3300 5.8500 ;
+         LAYER met5 ;
+	    RECT 0.0000 166.1900 75.0000 197.9650 ;
+	    RECT 0.0000 100.3750 4.5000 166.1900 ;
+	    RECT 70.4000 100.3750 75.0000 166.1900 ;
+	    RECT 0.0000 94.5500 75.0000 100.3750 ;
+	    RECT 2.8700 16.2500 72.1300 94.5500 ;
+	    RECT 2.5650 13.0000 72.4350 16.2500 ;
+	    RECT 2.8700 0.1000 72.1300 13.0000 ;
+   END
+END s8iom0_vdda_hvc_pad
+MACRO s8iom0_vdda_lvc_pad
+   CLASS PAD POWER ;
+   FOREIGN s8iom0_vdda_lvc_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 75.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 75.0000 54.0700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 1.2700 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 75.0000 49.3100 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 1.2700 49.3100 ;
+      END
+   END amuxbus_b
+   PIN drn_lvc1
+      PORT
+         LAYER met3 ;
+	    RECT 26.0000 -0.0350 36.8800 20.1850 ;
+      END
+   END drn_lvc1
+   PIN drn_lvc2
+      PORT
+         LAYER met3 ;
+	    RECT 38.3800 -0.0350 49.2550 22.8650 ;
+      END
+   END drn_lvc2
+   PIN src_bdy_lvc1
+      PORT
+         LAYER met2 ;
+	    RECT 0.5000 -0.0350 20.4950 1.4500 ;
+      END
+   END src_bdy_lvc1
+   PIN src_bdy_lvc2
+      PORT
+         LAYER met2 ;
+	    RECT 54.7150 -0.0350 74.7000 3.6250 ;
+      END
+   END src_bdy_lvc2
+   PIN bdy2_b2b
+      PORT
+         LAYER met2 ;
+	    RECT 34.4400 -0.0350 44.4400 0.2900 ;
+      END
+   END bdy2_b2b
+   PIN vssi
+      PORT
+         LAYER met1 ;
+	    RECT 34.3350 0.4750 35.3350 0.9750 ;
+      END
+   END vssi
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 45.7000 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 34.8050 75.0000 38.0500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8050 1.2700 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 49.6100 75.0000 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 75.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 34.7000 75.0000 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 1.2700 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.2700 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.2700 38.1500 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met3 ;
+	    RECT 50.7550 -0.0350 74.7000 12.9250 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 0.5000 -0.0350 24.5000 12.9250 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 74.0350 13.0000 75.0000 16.2500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 0.9650 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.0350 12.9000 75.0000 16.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 0.9650 16.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 9.3150 100.1050 65.9550 167.5350 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 29.9500 75.0000 33.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.2700 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 29.8500 75.0000 33.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.2700 33.3000 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 62.1500 75.0000 66.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.2700 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 62.0500 75.0000 66.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.2700 66.5000 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 0.1000 75.0000 5.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.2700 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 0.0000 75.0000 5.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.2700 5.4500 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 68.0000 75.0000 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 17.8500 75.0000 22.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.2700 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.2700 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 17.7500 75.0000 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 68.0000 75.0000 92.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.2700 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.2700 92.9650 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 6.9500 75.0000 11.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.2700 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 6.8500 75.0000 11.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.2700 11.5000 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 23.9000 75.0000 28.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.2700 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 23.8000 75.0000 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2700 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.2700 28.4500 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 39.6500 75.0000 44.1000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.2700 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 39.5500 75.0000 44.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.2700 44.2000 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 56.3000 75.0000 60.5500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.2700 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 56.2000 75.0000 60.6500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.2700 60.6500 ;
+      END
+   END vssio_q
+   OBS
+         LAYER li1 ;
+	    RECT 0.2400 0.9850 74.7550 197.7450 ;
+         LAYER met1 ;
+	    RECT 0.1200 1.2550 74.7850 197.8050 ;
+	    RECT 0.1200 0.1950 34.0550 1.2550 ;
+	    RECT 35.6150 0.1950 74.7850 1.2550 ;
+	    RECT 0.1200 -0.0350 74.7850 0.1950 ;
+         LAYER met2 ;
+	    RECT 0.4900 3.9050 74.7000 194.3950 ;
+	    RECT 0.4900 1.7300 54.4350 3.9050 ;
+	    RECT 20.7750 0.5700 54.4350 1.7300 ;
+	    RECT 20.7750 -0.0350 34.1600 0.5700 ;
+	    RECT 44.7200 -0.0350 54.4350 0.5700 ;
+         LAYER met3 ;
+	    RECT 0.4900 23.2650 74.7000 189.4800 ;
+	    RECT 0.4900 20.5850 37.9800 23.2650 ;
+	    RECT 0.4900 13.3250 25.6000 20.5850 ;
+	    RECT 24.9000 0.0000 25.6000 13.3250 ;
+	    RECT 37.2800 0.0000 37.9800 20.5850 ;
+	    RECT 49.6550 13.3250 74.7000 23.2650 ;
+	    RECT 49.6550 0.0000 50.3550 13.3250 ;
+         LAYER met4 ;
+	    RECT 1.6700 173.3500 73.3300 197.9650 ;
+	    RECT 0.9650 93.3650 74.0350 173.3500 ;
+	    RECT 1.6700 67.6000 73.3300 93.3650 ;
+	    RECT 0.9650 66.9000 74.0350 67.6000 ;
+	    RECT 1.6700 61.6500 73.3300 66.9000 ;
+	    RECT 0.9650 61.0500 74.0350 61.6500 ;
+	    RECT 1.6700 55.8000 73.3300 61.0500 ;
+	    RECT 0.9650 55.1000 74.0350 55.8000 ;
+	    RECT 1.6700 49.7100 73.3300 50.6900 ;
+	    RECT 0.9650 44.6000 74.0350 45.3000 ;
+	    RECT 1.6700 39.1500 73.3300 44.6000 ;
+	    RECT 0.9650 38.5500 74.0350 39.1500 ;
+	    RECT 1.6700 34.3000 73.3300 38.5500 ;
+	    RECT 0.9650 33.7000 74.0350 34.3000 ;
+	    RECT 1.6700 29.4500 73.3300 33.7000 ;
+	    RECT 0.9650 28.8500 74.0350 29.4500 ;
+	    RECT 1.6700 23.4000 73.3300 28.8500 ;
+	    RECT 0.9650 22.8000 74.0350 23.4000 ;
+	    RECT 1.6700 17.3500 73.3300 22.8000 ;
+	    RECT 0.9650 16.7500 74.0350 17.3500 ;
+	    RECT 1.3650 12.5000 73.6350 16.7500 ;
+	    RECT 0.9650 11.9000 74.0350 12.5000 ;
+	    RECT 1.6700 6.4500 73.3300 11.9000 ;
+	    RECT 0.9650 5.8500 74.0350 6.4500 ;
+	    RECT 1.6700 0.0000 73.3300 5.8500 ;
+         LAYER met5 ;
+	    RECT 0.0000 169.1350 75.0000 197.9650 ;
+	    RECT 0.0000 98.5050 7.7150 169.1350 ;
+	    RECT 67.5550 98.5050 75.0000 169.1350 ;
+	    RECT 0.0000 94.5500 75.0000 98.5050 ;
+	    RECT 2.8700 16.2500 72.1300 94.5500 ;
+	    RECT 2.5650 13.0000 72.4350 16.2500 ;
+	    RECT 2.8700 0.1000 72.1300 13.0000 ;
+   END
+END s8iom0_vdda_lvc_pad
+MACRO s8iom0s8_com_bus_slice_1um
+   CLASS PAD SPACER ;
+   FOREIGN s8iom0s8_com_bus_slice_1um ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 1.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 1.0000 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 1.0000 49.3100 ;
+      END
+   END amuxbus_b
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 1.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 1.0000 46.0300 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8000 1.0000 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.0000 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.0000 50.7900 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 1.0000 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 1.0000 16.3500 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.0000 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.0000 33.3000 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.0000 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.0000 66.5000 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.0000 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.0000 5.4500 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.0000 92.9650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.0000 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.0000 22.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.0000 92.9500 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.0000 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.0000 11.5000 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.0000 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.0000 28.4500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 173.7500 1.0000 197.9650 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.0000 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.0000 44.2000 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.0000 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.0000 60.6500 ;
+      END
+   END vssio_q
+   OBS
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.0000 197.9650 ;
+   END
+END s8iom0s8_com_bus_slice_1um
+MACRO s8iom0_vssio_hvc_pad
+   CLASS PAD GROUND ;
+   FOREIGN s8iom0_vssio_hvc_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 75.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 75.0000 54.0700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 1.2700 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 75.0000 49.3100 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 1.2700 49.3100 ;
+      END
+   END amuxbus_b
+   PIN drn_hvc
+      PORT
+         LAYER met2 ;
+	    RECT 50.3900 -2.0350 74.2900 23.6250 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 37.8900 -2.0350 48.8900 10.3450 ;
+      END
+   END drn_hvc
+   PIN src_bdy_hvc
+      PORT
+         LAYER met2 ;
+	    RECT 0.4950 -2.0350 24.3950 0.0200 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 25.8950 -2.0350 36.8950 10.3900 ;
+      END
+   END src_bdy_hvc
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 45.7000 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 34.8050 75.0000 38.0500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8050 1.2700 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 49.6100 75.0000 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 75.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 34.7000 75.0000 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 1.2700 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.2700 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.2700 38.1500 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met5 ;
+	    RECT 74.0350 13.0000 75.0000 16.2500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 0.9650 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.0350 12.9000 75.0000 16.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 0.9650 16.3500 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 29.9500 75.0000 33.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.2700 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 29.8500 75.0000 33.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.2700 33.3000 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 62.1500 75.0000 66.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.2700 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 62.0500 75.0000 66.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.2700 66.5000 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 0.1000 75.0000 5.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.2700 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 0.0000 75.0000 5.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.2700 5.4500 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 68.0000 75.0000 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 17.8500 75.0000 22.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.2700 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.2700 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 17.7500 75.0000 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 68.0000 75.0000 92.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.2700 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.2700 92.9650 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 6.9500 75.0000 11.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.2700 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 6.8500 75.0000 11.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.2700 11.5000 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met5 ;
+	    RECT 6.1000 101.9750 68.8000 164.5900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.6300 189.5650 0.6400 189.5750 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.2500 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 0.4950 -2.0350 24.3950 23.8150 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 50.3900 -2.0350 74.2900 23.8150 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 23.9000 75.0000 28.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.2700 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 23.8000 75.0000 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2700 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.2700 28.4500 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 39.6500 75.0000 44.1000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.2700 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 39.5500 75.0000 44.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.2700 44.2000 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 56.3000 75.0000 60.5500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.2700 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 56.2000 75.0000 60.6500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.2700 60.6500 ;
+      END
+   END vssio_q
+   OBS
+         LAYER li1 ;
+	    RECT 1.0700 -1.0350 72.7750 197.6600 ;
+         LAYER met1 ;
+	    RECT 0.1850 -1.0650 73.6200 197.6900 ;
+         LAYER met2 ;
+	    RECT 0.2650 23.9050 74.2900 193.0400 ;
+	    RECT 0.2650 0.3000 50.1100 23.9050 ;
+	    RECT 24.6750 -2.0350 50.1100 0.3000 ;
+         LAYER met3 ;
+	    RECT 0.2400 24.2150 74.2900 197.9650 ;
+	    RECT 24.7950 10.7900 49.9900 24.2150 ;
+	    RECT 24.7950 10.3450 25.4950 10.7900 ;
+	    RECT 37.2950 10.7450 49.9900 10.7900 ;
+	    RECT 37.2950 10.3450 37.4900 10.7450 ;
+	    RECT 49.2900 10.3450 49.9900 10.7450 ;
+         LAYER met4 ;
+	    RECT 1.6700 173.3500 73.3300 197.9650 ;
+	    RECT 0.9650 93.3650 74.0350 173.3500 ;
+	    RECT 1.6700 67.6000 73.3300 93.3650 ;
+	    RECT 0.9650 66.9000 74.0350 67.6000 ;
+	    RECT 1.6700 61.6500 73.3300 66.9000 ;
+	    RECT 0.9650 61.0500 74.0350 61.6500 ;
+	    RECT 1.6700 55.8000 73.3300 61.0500 ;
+	    RECT 0.9650 55.1000 74.0350 55.8000 ;
+	    RECT 1.6700 49.7100 73.3300 50.6900 ;
+	    RECT 0.9650 44.6000 74.0350 45.3000 ;
+	    RECT 1.6700 39.1500 73.3300 44.6000 ;
+	    RECT 0.9650 38.5500 74.0350 39.1500 ;
+	    RECT 1.6700 34.3000 73.3300 38.5500 ;
+	    RECT 0.9650 33.7000 74.0350 34.3000 ;
+	    RECT 1.6700 29.4500 73.3300 33.7000 ;
+	    RECT 0.9650 28.8500 74.0350 29.4500 ;
+	    RECT 1.6700 23.4000 73.3300 28.8500 ;
+	    RECT 0.9650 22.8000 74.0350 23.4000 ;
+	    RECT 1.6700 17.3500 73.3300 22.8000 ;
+	    RECT 0.9650 16.7500 74.0350 17.3500 ;
+	    RECT 1.3650 12.5000 73.6350 16.7500 ;
+	    RECT 0.9650 11.9000 74.0350 12.5000 ;
+	    RECT 1.6700 6.4500 73.3300 11.9000 ;
+	    RECT 0.9650 5.8500 74.0350 6.4500 ;
+	    RECT 1.6700 0.0000 73.3300 5.8500 ;
+         LAYER met5 ;
+	    RECT 0.0000 166.1900 75.0000 197.9650 ;
+	    RECT 0.0000 100.3750 4.5000 166.1900 ;
+	    RECT 70.4000 100.3750 75.0000 166.1900 ;
+	    RECT 0.0000 94.5500 75.0000 100.3750 ;
+	    RECT 2.8700 16.2500 72.1300 94.5500 ;
+	    RECT 2.5650 13.0000 72.4350 16.2500 ;
+	    RECT 2.8700 0.1000 72.1300 13.0000 ;
+   END
+END s8iom0_vssio_hvc_pad
+MACRO s8iom0_corner_pad
+   CLASS ENDCAP TOPRIGHT ;
+   FOREIGN s8iom0_corner_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 200.0000 BY 204.0000 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 57.1250 22.9100 60.1050 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 53.1250 0.0000 56.1050 26.9100 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 52.3650 20.9350 55.3450 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 48.3650 0.0000 51.3450 20.8750 ;
+      END
+   END amuxbus_b
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 51.7350 23.1550 60.7350 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.6300 56.0200 0.6400 56.0300 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 40.8350 1.3350 44.0850 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.7350 19.5750 52.0650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 40.7350 1.3350 44.1850 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 55.6450 21.5500 56.8250 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 60.4050 23.1750 60.7350 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 36.8400 0.0000 40.0850 1.2700 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 47.7350 0.0000 56.7350 27.1550 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 51.2850 0.6300 51.2950 0.6400 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 56.4050 0.0000 56.7350 27.1750 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 51.6450 0.0000 52.8250 21.5550 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 36.7350 0.0000 40.1850 1.2700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 47.7350 0.0000 48.0650 23.5750 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 19.0350 1.4700 22.2850 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 18.9350 1.4700 22.3850 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 15.0350 0.0000 18.2850 1.2550 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 14.9350 0.0000 18.3850 1.2550 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 35.9850 1.3850 39.2350 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 35.8850 1.3850 39.3350 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 31.9850 0.0000 35.2350 1.2700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 31.8850 0.0000 35.3350 1.2700 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.1850 1.4800 72.4350 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0850 1.4800 72.5350 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 64.1850 0.0000 68.4350 1.2700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 64.0850 0.0000 68.5350 1.2700 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.1350 2.3500 11.3850 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.0350 2.3500 11.4850 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 2.1350 0.0000 7.3850 1.2700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 2.0350 0.0000 7.4850 1.2700 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 74.0350 2.6450 98.9850 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.8850 1.5250 28.3350 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.7850 1.5250 28.4350 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 74.0350 2.6450 99.0000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 19.8850 0.0000 24.3350 1.2700 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 70.0350 0.0000 94.9850 1.8550 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 70.0350 0.0000 95.0000 1.8550 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 19.7850 0.0000 24.4350 1.2700 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 12.9850 3.7850 17.4350 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.8850 3.7850 17.5350 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 8.9850 0.0000 13.4350 1.2700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 8.8850 0.0000 13.5350 1.2700 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9350 1.6000 34.3850 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8350 1.6000 34.4850 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 179.7850 1.4350 204.0000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.6300 194.8650 0.6400 194.8750 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 25.9350 0.0000 30.3850 1.2700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 25.8350 0.0000 30.4850 1.2700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 175.7850 0.0000 200.0000 1.2700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 190.8650 0.6300 190.8750 0.6400 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.6850 1.4750 50.1350 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.5850 1.4750 50.2350 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 41.6850 0.0000 46.1350 1.2700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 41.5850 0.0000 46.2350 1.2700 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.3350 1.6250 66.5850 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.2350 1.6250 66.6850 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 58.3350 0.0000 62.5850 1.2700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 58.2350 0.0000 62.6850 1.2700 ;
+      END
+   END vssio_q
+   OBS
+         LAYER met4 ;
+	    RECT 1.8350 179.3850 200.0000 204.0000 ;
+	    RECT 0.0000 99.4000 200.0000 179.3850 ;
+	    RECT 3.0450 73.6350 200.0000 99.4000 ;
+	    RECT 0.0000 72.9350 200.0000 73.6350 ;
+	    RECT 1.8800 67.6850 200.0000 72.9350 ;
+	    RECT 0.0000 67.0850 200.0000 67.6850 ;
+	    RECT 2.0250 61.8350 200.0000 67.0850 ;
+	    RECT 0.0000 61.1350 200.0000 61.8350 ;
+	    RECT 23.5750 60.0050 200.0000 61.1350 ;
+	    RECT 23.3100 56.7250 200.0000 60.0050 ;
+	    RECT 21.9500 55.2450 200.0000 56.7250 ;
+	    RECT 21.3350 51.9650 200.0000 55.2450 ;
+	    RECT 19.9750 51.3350 200.0000 51.9650 ;
+	    RECT 0.0000 50.6350 200.0000 51.3350 ;
+	    RECT 1.8750 45.1850 200.0000 50.6350 ;
+	    RECT 0.0000 44.5850 200.0000 45.1850 ;
+	    RECT 1.7350 40.3350 200.0000 44.5850 ;
+	    RECT 0.0000 39.7350 200.0000 40.3350 ;
+	    RECT 1.7850 35.4850 200.0000 39.7350 ;
+	    RECT 0.0000 34.8850 200.0000 35.4850 ;
+	    RECT 2.0000 29.4350 200.0000 34.8850 ;
+	    RECT 0.0000 28.8350 200.0000 29.4350 ;
+	    RECT 1.9250 27.5750 200.0000 28.8350 ;
+	    RECT 1.9250 27.3100 56.0050 27.5750 ;
+	    RECT 1.9250 23.9750 52.7250 27.3100 ;
+	    RECT 1.9250 23.3850 47.3350 23.9750 ;
+	    RECT 0.0000 22.7850 47.3350 23.3850 ;
+	    RECT 1.8700 18.5350 47.3350 22.7850 ;
+	    RECT 48.4650 21.9550 52.7250 23.9750 ;
+	    RECT 48.4650 21.2750 51.2450 21.9550 ;
+	    RECT 0.0000 17.9350 47.3350 18.5350 ;
+	    RECT 4.1850 12.4850 47.3350 17.9350 ;
+	    RECT 0.0000 11.8850 47.3350 12.4850 ;
+	    RECT 2.7500 5.6350 47.3350 11.8850 ;
+	    RECT 0.0000 1.6700 47.3350 5.6350 ;
+	    RECT 0.0000 1.2550 1.6350 1.6700 ;
+	    RECT 7.8850 1.2550 8.4850 1.6700 ;
+	    RECT 13.9350 1.6550 19.3850 1.6700 ;
+	    RECT 13.9350 1.2550 14.5350 1.6550 ;
+	    RECT 18.7850 1.2550 19.3850 1.6550 ;
+	    RECT 24.8350 1.2550 25.4350 1.6700 ;
+	    RECT 30.8850 1.2550 31.4850 1.6700 ;
+	    RECT 35.7350 1.2550 36.3350 1.6700 ;
+	    RECT 40.5850 1.2550 41.1850 1.6700 ;
+	    RECT 46.6350 1.2550 47.3350 1.6700 ;
+	    RECT 57.1350 2.2550 200.0000 27.5750 ;
+	    RECT 57.1350 1.6700 69.6350 2.2550 ;
+	    RECT 57.1350 1.2550 57.8350 1.6700 ;
+	    RECT 63.0850 1.2550 63.6850 1.6700 ;
+	    RECT 68.9350 1.2550 69.6350 1.6700 ;
+	    RECT 95.4000 1.6700 200.0000 2.2550 ;
+	    RECT 95.4000 1.2550 175.3850 1.6700 ;
+         LAYER met5 ;
+	    RECT 0.0000 100.5850 200.0000 204.0000 ;
+	    RECT 4.2450 72.4350 200.0000 100.5850 ;
+	    RECT 3.0800 68.1850 200.0000 72.4350 ;
+	    RECT 3.2250 62.3350 200.0000 68.1850 ;
+	    RECT 24.7550 50.1350 200.0000 62.3350 ;
+	    RECT 3.0750 44.0850 200.0000 50.1350 ;
+	    RECT 2.9350 40.8350 200.0000 44.0850 ;
+	    RECT 2.9850 35.9850 200.0000 40.8350 ;
+	    RECT 3.2000 28.7550 200.0000 35.9850 ;
+	    RECT 3.2000 28.3350 46.1350 28.7550 ;
+	    RECT 3.1250 22.2850 46.1350 28.3350 ;
+	    RECT 3.0700 19.0350 46.1350 22.2850 ;
+	    RECT 5.3850 11.3850 46.1350 19.0350 ;
+	    RECT 3.9500 4.5350 46.1350 11.3850 ;
+	    RECT 0.0000 2.8700 46.1350 4.5350 ;
+	    RECT 58.3350 3.4550 200.0000 28.7550 ;
+	    RECT 58.3350 2.8700 68.4350 3.4550 ;
+	    RECT 0.0000 0.0000 0.5350 2.8700 ;
+	    RECT 15.0350 2.8550 18.2850 2.8700 ;
+	    RECT 96.5850 0.0000 200.0000 3.4550 ;
+   END
+END s8iom0_corner_pad
+MACRO s8iom0_vssio_lvc_pad
+   CLASS PAD GROUND ;
+   FOREIGN s8iom0_vssio_lvc_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 75.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 75.0000 54.0700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 1.2700 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 75.0000 49.3100 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 1.2700 49.3100 ;
+      END
+   END amuxbus_b
+   PIN drn_lvc1
+      PORT
+         LAYER met3 ;
+	    RECT 26.0000 -0.0350 36.8800 20.1850 ;
+      END
+   END drn_lvc1
+   PIN drn_lvc2
+      PORT
+         LAYER met3 ;
+	    RECT 38.3800 -0.0350 49.2550 22.8650 ;
+      END
+   END drn_lvc2
+   PIN src_bdy_lvc1
+      PORT
+         LAYER met2 ;
+	    RECT 0.5000 -0.0350 20.4950 1.4500 ;
+      END
+   END src_bdy_lvc1
+   PIN src_bdy_lvc2
+      PORT
+         LAYER met2 ;
+	    RECT 54.7150 -0.0350 74.7000 3.6250 ;
+      END
+   END src_bdy_lvc2
+   PIN bdy2_b2b
+      PORT
+         LAYER met2 ;
+	    RECT 34.4400 -0.0350 44.4400 0.2900 ;
+      END
+   END bdy2_b2b
+   PIN vssi
+      PORT
+         LAYER met1 ;
+	    RECT 34.3350 0.4750 35.3350 0.9750 ;
+      END
+   END vssi
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 45.7000 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 34.8050 75.0000 38.0500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8050 1.2700 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 49.6100 75.0000 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 75.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 34.7000 75.0000 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 1.2700 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.2700 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.2700 38.1500 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met5 ;
+	    RECT 74.0350 13.0000 75.0000 16.2500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 0.9650 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.0350 12.9000 75.0000 16.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 0.9650 16.3500 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 29.9500 75.0000 33.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.2700 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 29.8500 75.0000 33.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.2700 33.3000 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 62.1500 75.0000 66.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.2700 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 62.0500 75.0000 66.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.2700 66.5000 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 0.1000 75.0000 5.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.2700 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 0.0000 75.0000 5.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.2700 5.4500 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 68.0000 75.0000 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 17.8500 75.0000 22.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.2700 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.2700 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 17.7500 75.0000 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 68.0000 75.0000 92.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.2700 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.2700 92.9650 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 6.9500 75.0000 11.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.2700 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 6.8500 75.0000 11.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.2700 11.5000 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met5 ;
+	    RECT 9.3150 100.1050 65.9550 167.5350 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 50.7550 -0.0350 74.7000 23.8150 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 0.5000 -0.0350 24.5000 23.8150 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 23.9000 75.0000 28.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.2700 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 23.8000 75.0000 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2700 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.2700 28.4500 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 39.6500 75.0000 44.1000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.2700 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 39.5500 75.0000 44.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.2700 44.2000 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 56.3000 75.0000 60.5500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.2700 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 56.2000 75.0000 60.6500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.2700 60.6500 ;
+      END
+   END vssio_q
+   OBS
+         LAYER li1 ;
+	    RECT 0.2400 0.9850 74.7550 197.7450 ;
+         LAYER met1 ;
+	    RECT 0.1200 1.2550 74.7850 197.8050 ;
+	    RECT 0.1200 0.1950 34.0550 1.2550 ;
+	    RECT 35.6150 0.1950 74.7850 1.2550 ;
+	    RECT 0.1200 -0.0350 74.7850 0.1950 ;
+         LAYER met2 ;
+	    RECT 0.5000 3.9050 74.7000 194.3950 ;
+	    RECT 0.5000 1.7300 54.4350 3.9050 ;
+	    RECT 20.7750 0.5700 54.4350 1.7300 ;
+	    RECT 20.7750 -0.0350 34.1600 0.5700 ;
+	    RECT 44.7200 -0.0350 54.4350 0.5700 ;
+         LAYER met3 ;
+	    RECT 0.4900 24.2150 74.7000 197.9650 ;
+	    RECT 24.9000 23.2650 50.3550 24.2150 ;
+	    RECT 24.9000 20.5850 37.9800 23.2650 ;
+	    RECT 24.9000 1.6950 25.6000 20.5850 ;
+	    RECT 37.2800 1.6950 37.9800 20.5850 ;
+	    RECT 49.6550 1.6950 50.3550 23.2650 ;
+         LAYER met4 ;
+	    RECT 1.6700 173.3500 73.3300 197.9650 ;
+	    RECT 0.9650 93.3650 74.0350 173.3500 ;
+	    RECT 1.6700 67.6000 73.3300 93.3650 ;
+	    RECT 0.9650 66.9000 74.0350 67.6000 ;
+	    RECT 1.6700 61.6500 73.3300 66.9000 ;
+	    RECT 0.9650 61.0500 74.0350 61.6500 ;
+	    RECT 1.6700 55.8000 73.3300 61.0500 ;
+	    RECT 0.9650 55.1000 74.0350 55.8000 ;
+	    RECT 1.6700 49.7100 73.3300 50.6900 ;
+	    RECT 0.9650 44.6000 74.0350 45.3000 ;
+	    RECT 1.6700 39.1500 73.3300 44.6000 ;
+	    RECT 0.9650 38.5500 74.0350 39.1500 ;
+	    RECT 1.6700 34.3000 73.3300 38.5500 ;
+	    RECT 0.9650 33.7000 74.0350 34.3000 ;
+	    RECT 1.6700 29.4500 73.3300 33.7000 ;
+	    RECT 0.9650 28.8500 74.0350 29.4500 ;
+	    RECT 1.6700 23.4000 73.3300 28.8500 ;
+	    RECT 0.9650 22.8000 74.0350 23.4000 ;
+	    RECT 1.6700 17.3500 73.3300 22.8000 ;
+	    RECT 0.9650 16.7500 74.0350 17.3500 ;
+	    RECT 1.3650 12.5000 73.6350 16.7500 ;
+	    RECT 0.9650 11.9000 74.0350 12.5000 ;
+	    RECT 1.6700 6.4500 73.3300 11.9000 ;
+	    RECT 0.9650 5.8500 74.0350 6.4500 ;
+	    RECT 1.6700 0.0000 73.3300 5.8500 ;
+         LAYER met5 ;
+	    RECT 0.0000 169.1350 75.0000 197.9650 ;
+	    RECT 0.0000 98.5050 7.7150 169.1350 ;
+	    RECT 67.5550 98.5050 75.0000 169.1350 ;
+	    RECT 0.0000 94.5500 75.0000 98.5050 ;
+	    RECT 2.8700 16.2500 72.1300 94.5500 ;
+	    RECT 2.5650 13.0000 72.4350 16.2500 ;
+	    RECT 2.8700 0.1000 72.1300 13.0000 ;
+   END
+END s8iom0_vssio_lvc_pad
+MACRO s8iom0_vssa_lvc_pad
+   CLASS PAD GROUND ;
+   FOREIGN s8iom0_vssa_lvc_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 75.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 75.0000 54.0700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 51.0900 75.0000 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 75.0000 49.3100 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 46.3300 75.0000 49.3100 ;
+      END
+   END amuxbus_b
+   PIN drn_lvc1
+      PORT
+         LAYER met3 ;
+	    RECT 26.0000 -0.0350 36.8800 20.1850 ;
+      END
+   END drn_lvc1
+   PIN drn_lvc2
+      PORT
+         LAYER met3 ;
+	    RECT 38.3800 -0.0350 49.2550 22.8650 ;
+      END
+   END drn_lvc2
+   PIN src_bdy_lvc1
+      PORT
+         LAYER met2 ;
+	    RECT 0.5000 -0.0350 20.4950 1.4500 ;
+      END
+   END src_bdy_lvc1
+   PIN src_bdy_lvc2
+      PORT
+         LAYER met2 ;
+	    RECT 54.7150 -0.0350 74.7000 3.6250 ;
+      END
+   END src_bdy_lvc2
+   PIN bdy2_b2b
+      PORT
+         LAYER met2 ;
+	    RECT 34.4400 -0.0350 44.4400 0.2900 ;
+      END
+   END bdy2_b2b
+   PIN vssi
+      PORT
+         LAYER met1 ;
+	    RECT 34.3350 0.4750 35.3350 0.9750 ;
+      END
+   END vssi
+   PIN vssa
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.2700 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.2700 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 75.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 34.7000 75.0000 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 45.7000 75.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 54.3700 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 49.6100 75.0000 50.7900 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8000 1.2700 38.0500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 34.8000 75.0000 38.0500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 45.7000 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 0.5000 -0.0350 24.5000 34.7250 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 50.7550 -0.0350 74.7000 34.7250 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 9.3150 100.1050 65.9550 167.5350 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 0.9650 16.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.0350 12.9000 75.0000 16.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 0.9650 16.2500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 74.0350 13.0000 75.0000 16.2500 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.2700 33.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 29.8500 75.0000 33.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.2700 33.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 29.9500 75.0000 33.2000 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.2700 66.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 62.0500 75.0000 66.5000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.2700 66.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 62.1500 75.0000 66.4000 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.2700 5.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 0.0000 75.0000 5.4500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.2700 5.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 0.1000 75.0000 5.3500 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.2700 92.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.2700 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 68.0000 75.0000 92.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 17.7500 75.0000 22.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.2700 22.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.2700 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 17.8500 75.0000 22.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 68.0000 75.0000 92.9500 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.2700 11.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 6.8500 75.0000 11.5000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.2700 11.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 6.9500 75.0000 11.4000 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.2700 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2700 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 23.8000 75.0000 28.4500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.2700 28.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 23.9000 75.0000 28.3500 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.2700 44.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 39.5500 75.0000 44.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.2700 44.1000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 39.6500 75.0000 44.1000 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.2700 60.6500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 56.2000 75.0000 60.6500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.2700 60.5500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 56.3000 75.0000 60.5500 ;
+      END
+   END vssio_q
+   OBS
+         LAYER li1 ;
+	    RECT 0.2400 0.9850 74.7550 197.7450 ;
+         LAYER met1 ;
+	    RECT 0.1200 1.2550 74.7850 197.8050 ;
+	    RECT 0.1200 0.1950 34.0550 1.2550 ;
+	    RECT 35.6150 0.1950 74.7850 1.2550 ;
+	    RECT 0.1200 -0.0350 74.7850 0.1950 ;
+         LAYER met2 ;
+	    RECT 0.5000 3.9050 74.7000 194.3950 ;
+	    RECT 0.5000 1.7300 54.4350 3.9050 ;
+	    RECT 20.7750 0.5700 54.4350 1.7300 ;
+	    RECT 20.7750 -0.0350 34.1600 0.5700 ;
+	    RECT 44.7200 -0.0350 54.4350 0.5700 ;
+         LAYER met3 ;
+	    RECT 0.4900 35.1250 74.7000 189.4800 ;
+	    RECT 24.9000 23.2650 50.3550 35.1250 ;
+	    RECT 24.9000 20.5850 37.9800 23.2650 ;
+	    RECT 24.9000 1.5450 25.6000 20.5850 ;
+	    RECT 37.2800 1.5450 37.9800 20.5850 ;
+	    RECT 49.6550 1.5450 50.3550 23.2650 ;
+         LAYER met4 ;
+	    RECT 1.6700 173.3500 73.3300 197.9650 ;
+	    RECT 0.9650 93.3650 74.0350 173.3500 ;
+	    RECT 1.6700 67.6000 73.3300 93.3650 ;
+	    RECT 0.9650 66.9000 74.0350 67.6000 ;
+	    RECT 1.6700 61.6500 73.3300 66.9000 ;
+	    RECT 0.9650 61.0500 74.0350 61.6500 ;
+	    RECT 1.6700 55.8000 73.3300 61.0500 ;
+	    RECT 0.9650 55.1000 74.0350 55.8000 ;
+	    RECT 1.6700 49.7100 73.3300 50.6900 ;
+	    RECT 0.9650 44.6000 74.0350 45.3000 ;
+	    RECT 1.6700 39.1500 73.3300 44.6000 ;
+	    RECT 0.9650 38.5500 74.0350 39.1500 ;
+	    RECT 1.6700 34.3000 73.3300 38.5500 ;
+	    RECT 0.9650 33.7000 74.0350 34.3000 ;
+	    RECT 1.6700 29.4500 73.3300 33.7000 ;
+	    RECT 0.9650 28.8500 74.0350 29.4500 ;
+	    RECT 1.6700 23.4000 73.3300 28.8500 ;
+	    RECT 0.9650 22.8000 74.0350 23.4000 ;
+	    RECT 1.6700 17.3500 73.3300 22.8000 ;
+	    RECT 0.9650 16.7500 74.0350 17.3500 ;
+	    RECT 1.3650 12.5000 73.6350 16.7500 ;
+	    RECT 0.9650 11.9000 74.0350 12.5000 ;
+	    RECT 1.6700 6.4500 73.3300 11.9000 ;
+	    RECT 0.9650 5.8500 74.0350 6.4500 ;
+	    RECT 1.6700 0.0000 73.3300 5.8500 ;
+         LAYER met5 ;
+	    RECT 0.0000 169.1350 75.0000 197.9650 ;
+	    RECT 0.0000 98.5050 7.7150 169.1350 ;
+	    RECT 67.5550 98.5050 75.0000 169.1350 ;
+	    RECT 0.0000 94.5500 75.0000 98.5050 ;
+	    RECT 2.8700 16.2500 72.1300 94.5500 ;
+	    RECT 2.5650 13.0000 72.4350 16.2500 ;
+	    RECT 2.8700 0.1000 72.1300 13.0000 ;
+   END
+END s8iom0_vssa_lvc_pad
+MACRO s8iom0_vssa_hvc_pad
+   CLASS PAD GROUND ;
+   FOREIGN s8iom0_vssa_hvc_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 75.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 75.0000 54.0700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 1.2700 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 75.0000 49.3100 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 1.2700 49.3100 ;
+      END
+   END amuxbus_b
+   PIN drn_hvc
+      PORT
+         LAYER met2 ;
+	    RECT 50.3900 -2.0350 74.2900 23.6250 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 37.8900 -2.0350 48.8900 10.3450 ;
+      END
+   END drn_hvc
+   PIN src_bdy_hvc
+      PORT
+         LAYER met2 ;
+	    RECT 0.4950 -2.0350 24.3950 0.0200 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 25.8950 -2.0350 36.8950 10.3900 ;
+      END
+   END src_bdy_hvc
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 6.1000 101.9750 68.8000 164.5900 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 0.4950 -2.0350 24.3950 30.4800 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 50.3900 -2.0350 74.2900 34.7250 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 45.7000 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 34.8050 75.0000 38.0500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8050 1.2700 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 49.6100 75.0000 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 54.3700 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 45.7000 75.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 34.7000 75.0000 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 1.2700 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.2700 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.2700 38.1500 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met5 ;
+	    RECT 74.0350 13.0000 75.0000 16.2500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 0.9650 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.0350 12.9000 75.0000 16.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 0.9650 16.3500 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 29.9500 75.0000 33.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.2700 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 29.8500 75.0000 33.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.2700 33.3000 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 62.1500 75.0000 66.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.2700 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 62.0500 75.0000 66.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.2700 66.5000 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 0.1000 75.0000 5.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.2700 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 0.0000 75.0000 5.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.2700 5.4500 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 68.0000 75.0000 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 17.8500 75.0000 22.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.2700 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.2700 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 17.7500 75.0000 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 68.0000 75.0000 92.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.2700 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.2700 92.9650 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 6.9500 75.0000 11.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.2700 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 6.8500 75.0000 11.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.2700 11.5000 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2050 197.9650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 23.9000 75.0000 28.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.2700 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 23.8000 75.0000 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2700 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.2700 28.4500 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 39.6500 75.0000 44.1000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.2700 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 39.5500 75.0000 44.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.2700 44.2000 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 56.3000 75.0000 60.5500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.2700 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 56.2000 75.0000 60.6500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.2700 60.6500 ;
+      END
+   END vssio_q
+   PIN vssio
+      PORT
+         LAYER met4 ;
+	    RECT 74.3600 189.5650 74.3700 189.5750 ;
+      END
+   END vssio
+   OBS
+         LAYER li1 ;
+	    RECT 1.0700 -1.0350 72.7750 197.6600 ;
+         LAYER met1 ;
+	    RECT 0.1850 -1.0650 73.6200 197.6900 ;
+         LAYER met2 ;
+	    RECT 0.2650 23.9050 74.2900 193.0400 ;
+	    RECT 0.2650 0.3000 50.1100 23.9050 ;
+	    RECT 24.6750 -2.0350 50.1100 0.3000 ;
+         LAYER met3 ;
+	    RECT 0.2400 35.1250 74.2900 193.0650 ;
+	    RECT 0.2400 30.8800 49.9900 35.1250 ;
+	    RECT 24.7950 10.7900 49.9900 30.8800 ;
+	    RECT 24.7950 10.3450 25.4950 10.7900 ;
+	    RECT 37.2950 10.7450 49.9900 10.7900 ;
+	    RECT 37.2950 10.3450 37.4900 10.7450 ;
+	    RECT 49.2900 10.3450 49.9900 10.7450 ;
+         LAYER met4 ;
+	    RECT 1.6700 173.3500 73.3300 197.9650 ;
+	    RECT 0.9650 93.3650 74.0350 173.3500 ;
+	    RECT 1.6700 67.6000 73.3300 93.3650 ;
+	    RECT 0.9650 66.9000 74.0350 67.6000 ;
+	    RECT 1.6700 61.6500 73.3300 66.9000 ;
+	    RECT 0.9650 61.0500 74.0350 61.6500 ;
+	    RECT 1.6700 55.8000 73.3300 61.0500 ;
+	    RECT 0.9650 55.1000 74.0350 55.8000 ;
+	    RECT 1.6700 54.4700 73.3300 55.1000 ;
+	    RECT 1.6700 49.7100 73.3300 50.6900 ;
+	    RECT 1.6700 45.3000 73.3300 45.9300 ;
+	    RECT 0.9650 44.6000 74.0350 45.3000 ;
+	    RECT 1.6700 39.1500 73.3300 44.6000 ;
+	    RECT 0.9650 38.5500 74.0350 39.1500 ;
+	    RECT 1.6700 34.3000 73.3300 38.5500 ;
+	    RECT 0.9650 33.7000 74.0350 34.3000 ;
+	    RECT 1.6700 29.4500 73.3300 33.7000 ;
+	    RECT 0.9650 28.8500 74.0350 29.4500 ;
+	    RECT 1.6700 23.4000 73.3300 28.8500 ;
+	    RECT 0.9650 22.8000 74.0350 23.4000 ;
+	    RECT 1.6700 17.3500 73.3300 22.8000 ;
+	    RECT 0.9650 16.7500 74.0350 17.3500 ;
+	    RECT 1.3650 12.5000 73.6350 16.7500 ;
+	    RECT 0.9650 11.9000 74.0350 12.5000 ;
+	    RECT 1.6700 6.4500 73.3300 11.9000 ;
+	    RECT 0.9650 5.8500 74.0350 6.4500 ;
+	    RECT 1.6700 0.0000 73.3300 5.8500 ;
+         LAYER met5 ;
+	    RECT 0.0000 166.1900 75.0000 197.9650 ;
+	    RECT 0.0000 100.3750 4.5000 166.1900 ;
+	    RECT 70.4000 100.3750 75.0000 166.1900 ;
+	    RECT 0.0000 94.5500 75.0000 100.3750 ;
+	    RECT 2.8700 16.2500 72.1300 94.5500 ;
+	    RECT 2.5650 13.0000 72.4350 16.2500 ;
+	    RECT 2.8700 0.1000 72.1300 13.0000 ;
+   END
+END s8iom0_vssa_hvc_pad
+MACRO s8iom0_vssd_hvc_pad
+   CLASS PAD GROUND ;
+   FOREIGN s8iom0_vssd_hvc_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 75.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 75.0000 54.0700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 1.2700 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 75.0000 49.3100 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 1.2700 49.3100 ;
+      END
+   END amuxbus_b
+   PIN drn_hvc
+      PORT
+         LAYER met2 ;
+	    RECT 50.3900 -2.0350 74.2900 23.6250 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 37.8900 -2.0350 48.8900 10.3450 ;
+      END
+   END drn_hvc
+   PIN src_bdy_hvc
+      PORT
+         LAYER met2 ;
+	    RECT 0.4950 -2.0350 24.3950 0.0200 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 25.8950 -2.0350 36.8950 10.3900 ;
+      END
+   END src_bdy_hvc
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 45.7000 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 34.8050 75.0000 38.0500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8050 1.2700 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 49.6100 75.0000 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 75.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 34.7000 75.0000 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 1.2700 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.2700 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.2700 38.1500 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met5 ;
+	    RECT 74.0350 13.0000 75.0000 16.2500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 0.9650 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.0350 12.9000 75.0000 16.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 0.9650 16.3500 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 29.9500 75.0000 33.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.2700 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 29.8500 75.0000 33.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.2700 33.3000 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 62.1500 75.0000 66.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.2700 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 62.0500 75.0000 66.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.2700 66.5000 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 0.1000 75.0000 5.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.2700 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 0.0000 75.0000 5.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.2700 5.4500 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 68.0000 75.0000 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 17.8500 75.0000 22.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.2700 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.2700 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 17.7500 75.0000 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 68.0000 75.0000 92.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.2700 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.2700 92.9650 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 6.9500 75.0000 11.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.2700 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 6.8500 75.0000 11.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.2700 11.5000 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2050 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.2250 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 23.9000 75.0000 28.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.2700 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 23.8000 75.0000 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2700 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.2700 28.4500 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 6.1000 101.9750 68.8000 164.5900 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 0.4950 -2.0350 24.3950 30.4800 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 50.3900 -2.0350 74.2900 39.5650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 39.6500 75.0000 44.1000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.2700 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 39.5500 75.0000 44.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.2700 44.2000 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 56.3000 75.0000 60.5500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.2700 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 56.2000 75.0000 60.6500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.2700 60.6500 ;
+      END
+   END vssio_q
+   OBS
+         LAYER li1 ;
+	    RECT 1.0700 -1.0350 72.7750 197.6600 ;
+         LAYER met1 ;
+	    RECT 0.1850 -1.0650 73.6200 197.6900 ;
+         LAYER met2 ;
+	    RECT 0.2650 23.9050 74.2900 193.0400 ;
+	    RECT 0.2650 0.3000 50.1100 23.9050 ;
+	    RECT 24.6750 -2.0350 50.1100 0.3000 ;
+         LAYER met3 ;
+	    RECT 0.2400 39.9650 74.2900 193.0650 ;
+	    RECT 0.2400 30.8800 49.9900 39.9650 ;
+	    RECT 24.7950 10.7900 49.9900 30.8800 ;
+	    RECT 24.7950 10.3450 25.4950 10.7900 ;
+	    RECT 37.2950 10.7450 49.9900 10.7900 ;
+	    RECT 37.2950 10.3450 37.4900 10.7450 ;
+	    RECT 49.2900 10.3450 49.9900 10.7450 ;
+         LAYER met4 ;
+	    RECT 1.6700 173.3500 73.3300 197.9650 ;
+	    RECT 0.9650 93.3650 74.0350 173.3500 ;
+	    RECT 1.6700 67.6000 73.3300 93.3650 ;
+	    RECT 0.9650 66.9000 74.0350 67.6000 ;
+	    RECT 1.6700 61.6500 73.3300 66.9000 ;
+	    RECT 0.9650 61.0500 74.0350 61.6500 ;
+	    RECT 1.6700 55.8000 73.3300 61.0500 ;
+	    RECT 0.9650 55.1000 74.0350 55.8000 ;
+	    RECT 1.6700 49.7100 73.3300 50.6900 ;
+	    RECT 0.9650 44.6000 74.0350 45.3000 ;
+	    RECT 1.6700 39.1500 73.3300 44.6000 ;
+	    RECT 0.9650 38.5500 74.0350 39.1500 ;
+	    RECT 1.6700 34.3000 73.3300 38.5500 ;
+	    RECT 0.9650 33.7000 74.0350 34.3000 ;
+	    RECT 1.6700 29.4500 73.3300 33.7000 ;
+	    RECT 0.9650 28.8500 74.0350 29.4500 ;
+	    RECT 1.6700 23.4000 73.3300 28.8500 ;
+	    RECT 0.9650 22.8000 74.0350 23.4000 ;
+	    RECT 1.6700 17.3500 73.3300 22.8000 ;
+	    RECT 0.9650 16.7500 74.0350 17.3500 ;
+	    RECT 1.3650 12.5000 73.6350 16.7500 ;
+	    RECT 0.9650 11.9000 74.0350 12.5000 ;
+	    RECT 1.6700 6.4500 73.3300 11.9000 ;
+	    RECT 0.9650 5.8500 74.0350 6.4500 ;
+	    RECT 1.6700 0.0000 73.3300 5.8500 ;
+         LAYER met5 ;
+	    RECT 0.0000 166.1900 75.0000 197.9650 ;
+	    RECT 0.0000 100.3750 4.5000 166.1900 ;
+	    RECT 70.4000 100.3750 75.0000 166.1900 ;
+	    RECT 0.0000 94.5500 75.0000 100.3750 ;
+	    RECT 2.8700 16.2500 72.1300 94.5500 ;
+	    RECT 2.5650 13.0000 72.4350 16.2500 ;
+	    RECT 2.8700 0.1000 72.1300 13.0000 ;
+   END
+END s8iom0_vssd_hvc_pad
+MACRO s8iom0_vssd_lvc_pad
+   CLASS PAD GROUND ;
+   FOREIGN s8iom0_vssd_lvc_pad ;
+   ORIGIN -0.0000 -0.0000 ;
+   SIZE 75.0000 BY 197.9650 ;
+   PIN amuxbus_a
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 75.0000 54.0700 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 51.0900 1.2700 54.0700 ;
+      END
+   END amuxbus_a
+   PIN amuxbus_b
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 75.0000 49.3100 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 46.3300 1.2700 49.3100 ;
+      END
+   END amuxbus_b
+   PIN drn_lvc1
+      PORT
+         LAYER met3 ;
+	    RECT 26.0000 -0.0350 36.8800 20.1850 ;
+      END
+   END drn_lvc1
+   PIN drn_lvc2
+      PORT
+         LAYER met3 ;
+	    RECT 38.3800 -0.0350 49.2550 22.8650 ;
+      END
+   END drn_lvc2
+   PIN src_bdy_lvc1
+      PORT
+         LAYER met2 ;
+	    RECT 0.5000 -0.0350 20.4950 1.4500 ;
+      END
+   END src_bdy_lvc1
+   PIN src_bdy_lvc2
+      PORT
+         LAYER met2 ;
+	    RECT 54.7150 -0.0350 74.7000 3.6250 ;
+      END
+   END src_bdy_lvc2
+   PIN bdy2_b2b
+      PORT
+         LAYER met2 ;
+	    RECT 34.4400 -0.0350 44.4400 0.2900 ;
+      END
+   END bdy2_b2b
+   PIN vssi
+      PORT
+         LAYER met1 ;
+	    RECT 34.3350 0.4750 35.3350 0.9750 ;
+      END
+   END vssi
+   PIN vssa
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 45.7000 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 34.8050 75.0000 38.0500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 45.7000 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 34.8050 1.2700 38.0500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 49.6100 75.0000 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 75.0000 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 75.0000 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 34.7000 75.0000 38.1500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 45.7000 1.2700 46.0300 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 49.6100 1.2700 50.7900 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 54.3700 1.2700 54.7000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 34.7000 1.2700 38.1500 ;
+      END
+   END vssa
+   PIN vdda
+      PORT
+         LAYER met5 ;
+	    RECT 74.0350 13.0000 75.0000 16.2500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 13.0000 0.9650 16.2500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 74.0350 12.9000 75.0000 16.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 12.9000 0.9650 16.3500 ;
+      END
+   END vdda
+   PIN vswitch
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 29.9500 75.0000 33.2000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 29.9500 1.2700 33.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 29.8500 75.0000 33.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 29.8500 1.2700 33.3000 ;
+      END
+   END vswitch
+   PIN vddio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 62.1500 75.0000 66.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 62.1500 1.2700 66.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 62.0500 75.0000 66.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 62.0500 1.2700 66.5000 ;
+      END
+   END vddio_q
+   PIN vcchib
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 0.1000 75.0000 5.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 0.1000 1.2700 5.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 0.0000 75.0000 5.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 0.0000 1.2700 5.4500 ;
+      END
+   END vcchib
+   PIN vddio
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 68.0000 75.0000 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 17.8500 75.0000 22.3000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 68.0000 1.2700 92.9500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 17.8500 1.2700 22.3000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 17.7500 75.0000 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 68.0000 75.0000 92.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 17.7500 1.2700 22.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 68.0000 1.2700 92.9650 ;
+      END
+   END vddio
+   PIN vccd
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 6.9500 75.0000 11.4000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 6.9500 1.2700 11.4000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 6.8500 75.0000 11.5000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 6.8500 1.2700 11.5000 ;
+      END
+   END vccd
+   PIN vssio
+      PORT
+         LAYER met4 ;
+	    RECT 74.2250 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2050 197.9650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 23.9000 75.0000 28.3500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 23.9000 1.2700 28.3500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 23.8000 75.0000 28.4500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 173.7500 75.0000 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 173.7500 1.2700 197.9650 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 23.8000 1.2700 28.4500 ;
+      END
+   END vssio
+   PIN vssd
+      PORT
+         LAYER met5 ;
+	    RECT 9.3150 100.1050 65.9550 167.5350 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 50.7550 -0.0350 74.7000 39.5650 ;
+      END
+      PORT
+         LAYER met3 ;
+	    RECT 0.5000 -0.0350 24.5000 39.5650 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 39.6500 75.0000 44.1000 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 39.6500 1.2700 44.1000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 39.5500 75.0000 44.2000 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 39.5500 1.2700 44.2000 ;
+      END
+   END vssd
+   PIN vssio_q
+      PORT
+         LAYER met5 ;
+	    RECT 73.7300 56.3000 75.0000 60.5500 ;
+      END
+      PORT
+         LAYER met5 ;
+	    RECT 0.0000 56.3000 1.2700 60.5500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 73.7300 56.2000 75.0000 60.6500 ;
+      END
+      PORT
+         LAYER met4 ;
+	    RECT 0.0000 56.2000 1.2700 60.6500 ;
+      END
+   END vssio_q
+   OBS
+         LAYER li1 ;
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+         LAYER met1 ;
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+	    RECT 20.7750 -0.0350 34.1600 0.5700 ;
+	    RECT 44.7200 -0.0350 54.4350 0.5700 ;
+         LAYER met3 ;
+	    RECT 0.5000 39.9650 74.7000 189.4800 ;
+	    RECT 24.9000 23.2650 50.3550 39.9650 ;
+	    RECT 24.9000 20.5850 37.9800 23.2650 ;
+	    RECT 24.9000 17.7550 25.6000 20.5850 ;
+	    RECT 37.2800 17.7550 37.9800 20.5850 ;
+	    RECT 49.6550 17.7550 50.3550 23.2650 ;
+         LAYER met4 ;
+	    RECT 1.6700 173.3500 73.3300 197.9650 ;
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+	    RECT 1.6700 67.6000 73.3300 93.3650 ;
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+	    RECT 1.6700 55.8000 73.3300 61.0500 ;
+	    RECT 0.9650 55.1000 74.0350 55.8000 ;
+	    RECT 1.6700 49.7100 73.3300 50.6900 ;
+	    RECT 0.9650 44.6000 74.0350 45.3000 ;
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+	    RECT 1.6700 34.3000 73.3300 38.5500 ;
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+	    RECT 1.6700 23.4000 73.3300 28.8500 ;
+	    RECT 0.9650 22.8000 74.0350 23.4000 ;
+	    RECT 1.6700 17.3500 73.3300 22.8000 ;
+	    RECT 0.9650 16.7500 74.0350 17.3500 ;
+	    RECT 1.3650 12.5000 73.6350 16.7500 ;
+	    RECT 0.9650 11.9000 74.0350 12.5000 ;
+	    RECT 1.6700 6.4500 73.3300 11.9000 ;
+	    RECT 0.9650 5.8500 74.0350 6.4500 ;
+	    RECT 1.6700 0.0000 73.3300 5.8500 ;
+         LAYER met5 ;
+	    RECT 0.0000 169.1350 75.0000 197.9650 ;
+	    RECT 0.0000 98.5050 7.7150 169.1350 ;
+	    RECT 67.5550 98.5050 75.0000 169.1350 ;
+	    RECT 0.0000 94.5500 75.0000 98.5050 ;
+	    RECT 2.8700 16.2500 72.1300 94.5500 ;
+	    RECT 2.5650 13.0000 72.4350 16.2500 ;
+	    RECT 2.8700 0.1000 72.1300 13.0000 ;
+   END
+END s8iom0_vssd_lvc_pad
+END LIBRARY ;
diff --git a/sky130/custom/sky130_fd_io/mag/all_pads_test.mag b/sky130/custom/sky130_fd_io/mag/all_pads_test.mag
new file mode 100644
index 0000000..54d9f7a
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/all_pads_test.mag
@@ -0,0 +1,8491 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1584383567
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+rect 87777 44702 88103 44703
+rect 88601 44703 88602 47702
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+rect 104597 46501 104647 47501
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+rect 106549 46501 106599 47501
+rect 108199 46501 108249 47501
+rect 108501 46501 108551 47501
+rect 110151 46501 110201 47501
+rect 110453 46501 110503 47501
+rect 112103 46501 112153 47501
+rect 112405 46501 112455 47501
+rect 114055 46501 114105 47501
+rect 103445 45257 103495 46257
+rect 104295 45257 104345 46257
+rect 104597 45257 104647 46257
+rect 106247 45257 106297 46257
+rect 106549 45257 106599 46257
+rect 108199 45257 108249 46257
+rect 108501 45257 108551 46257
+rect 110151 45257 110201 46257
+rect 110453 45257 110503 46257
+rect 112103 45257 112153 46257
+rect 112405 45257 112455 46257
+rect 114055 45257 114105 46257
+rect 89425 44702 89751 44703
+rect 86297 44472 86383 44508
+use s8iom0_vdda_lvc_pad  s8iom0_vdda_lvc_pad_0
+timestamp 1584383356
+transform 1 0 -868 0 1 91931
+box 0 -61 15000 39593
+use s8iom0_vdda_hvc_pad  s8iom0_vdda_hvc_pad_0
+timestamp 1584383356
+transform 1 0 19686 0 1 92471
+box 0 -407 15000 39593
+use s8iom0_vccd_lvc_pad  s8iom0_vccd_lvc_pad_0
+timestamp 1584383356
+transform 1 0 38106 0 1 91155
+box 0 -61 15000 39593
+use s8iom0_vccd_hvc_pad  s8iom0_vccd_hvc_pad_0
+timestamp 1584383356
+transform 1 0 56526 0 1 91335
+box 0 -435 15000 39593
+use s8iom0_vddio_hvc_pad  s8iom0_vddio_hvc_pad_0
+timestamp 1584383356
+transform 1 0 77078 0 1 92305
+box 0 -435 15000 39593
+use s8iom0_vddio_lvc_pad  s8iom0_vddio_lvc_pad_0
+timestamp 1584383356
+transform 1 0 97048 0 1 92319
+box 0 -61 15000 39593
+use s8iom0_gpiov2_pad  s8iom0_gpiov2_pad_0
+timestamp 1584383356
+transform 1 0 119295 0 1 92724
+box -143 -466 16134 39593
+use s8iom0s8_top_xres4v2  s8iom0s8_top_xres4v2_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 140197 0 1 92452
+box -103 0 15124 40000
+use s8iom0s8_top_gpio_ovtv2  s8iom0s8_top_gpio_ovtv2_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 160920 0 1 92540
+box -80 -88 28211 40076
+use s8iom0_vssd_lvc_pad  s8iom0_vssd_lvc_pad_0
+timestamp 1584383356
+transform 1 0 -480 0 1 46173
+box 0 -61 15000 39593
+use s8iom0_vssd_hvc_pad  s8iom0_vssd_hvc_pad_0
+timestamp 1584383356
+transform 1 0 18134 0 1 46741
+box 0 -435 15000 39593
+use s8iom0_vssa_hvc_pad  s8iom0_vssa_hvc_pad_0
+timestamp 1584383356
+transform 1 0 37912 0 1 46935
+box 0 -435 15000 39593
+use s8iom0_vssa_lvc_pad  s8iom0_vssa_lvc_pad_0
+timestamp 1584383356
+transform 1 0 60016 0 1 44427
+box 0 -61 15000 39593
+use s8iom0_vssio_lvc_pad  s8iom0_vssio_lvc_pad_0
+timestamp 1584383356
+transform 1 0 79018 0 1 44233
+box 0 -61 15000 39593
+use s8iom0_vssio_hvc_pad  s8iom0_vssio_hvc_pad_0
+timestamp 1584383356
+transform 1 0 100540 0 1 44967
+box 0 -407 15000 39593
+use s8iom0_corner_pad  s8iom0_corner_pad_0
+timestamp 1584383356
+transform 1 0 123795 0 1 46420
+box -181 -114 40000 40800
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/power_pads_lib.mag b/sky130/custom/sky130_fd_io/mag/power_pads_lib.mag
new file mode 100644
index 0000000..a8876fa
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/power_pads_lib.mag
@@ -0,0 +1,65 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1585845698
+use s8iom0_vssd_lvc_pad  s8iom0_vssd_lvc_pad_0
+timestamp 1585845698
+transform 1 0 1268 0 1 -42858
+box 0 -61 15000 39593
+use s8iom0_vssd_hvc_pad  s8iom0_vssd_hvc_pad_0
+timestamp 1585845698
+transform 1 0 18322 0 1 -43322
+box 0 -435 15000 39593
+use s8iom0_vssa_hvc_pad  s8iom0_vssa_hvc_pad_0
+timestamp 1585845698
+transform 1 0 36302 0 1 -43582
+box 0 -435 15000 39593
+use s8iom0_vssa_lvc_pad  s8iom0_vssa_lvc_pad_0
+timestamp 1585845698
+transform 1 0 54022 0 1 -43956
+box 0 -61 15000 39593
+use s8iom0_vssio_lvc_pad  s8iom0_vssio_lvc_pad_0
+timestamp 1585845698
+transform 1 0 71611 0 1 -43826
+box 0 -7 15000 39593
+use s8iom0_corner_pad  s8iom0_corner_pad_0
+timestamp 1585845698
+transform 1 0 111407 0 1 -43193
+box -181 -114 40000 40800
+use s8iom0_vssio_hvc_pad  s8iom0_vssio_hvc_pad_0
+timestamp 1585845698
+transform 1 0 89461 0 1 -43192
+box 0 -407 15000 39593
+use s8iom0s8_com_bus_slice_1um  s8iom0s8_com_bus_slice_1um_0
+timestamp 1576684134
+transform 1 0 108518 0 1 -43389
+box 0 0 200 39593
+use s8iom0_vdda_lvc_pad  s8iom0_vdda_lvc_pad_0
+timestamp 1585845698
+transform 1 0 1952 0 1 -313
+box 0 -61 15000 39593
+use s8iom0_vdda_hvc_pad  s8iom0_vdda_hvc_pad_0
+timestamp 1585845698
+transform 1 0 20277 0 1 195
+box 0 -435 15000 39593
+use s8iom0_vccd_lvc_pad  s8iom0_vccd_lvc_pad_0
+timestamp 1585845698
+transform 1 0 37605 0 1 -49
+box 0 -61 15000 39593
+use s8iom0_vddio_hvc_pad  s8iom0_vddio_hvc_pad_0
+timestamp 1585845698
+transform 1 0 73415 0 1 258
+box 0 -435 15000 39593
+use s8iom0_vccd_hvc_pad  s8iom0_vccd_hvc_pad_0
+timestamp 1585845698
+transform 1 0 55455 0 1 325
+box 0 -435 15000 39593
+use s8iom0_gpiov2_pad  s8iom0_gpiov2_pad_0
+timestamp 1585845698
+transform 1 0 110622 0 1 590
+box -143 -466 16134 39593
+use s8iom0_vddio_lvc_pad  s8iom0_vddio_lvc_pad_0
+timestamp 1585845698
+transform 1 0 91354 0 1 -208
+box 0 -7 15000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_corner_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_corner_pad.mag
new file mode 100644
index 0000000..8da430c
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_corner_pad.mag
@@ -0,0 +1,199 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1576765820
+<< metal4 >>
+rect 0 35957 254 40800
+rect 0 14807 254 19800
+rect 0 13617 254 14507
+rect 0 12447 254 13337
+rect 0 12081 254 12147
+rect 0 11425 100 12021
+rect 0 11129 254 11365
+rect 0 10473 116 11069
+rect 0 10347 254 10413
+rect 0 9117 254 10047
+rect 0 8147 254 8837
+rect 0 7177 254 7867
+rect 0 5967 254 6897
+rect 0 4757 254 5687
+rect 0 3787 254 4477
+rect 0 2577 254 3507
+rect 0 1207 254 2297
+rect 407 0 1497 254
+rect 1777 0 2707 254
+rect 2987 0 3677 254
+rect 3957 0 4887 254
+rect 5167 0 6097 254
+rect 6377 0 7067 254
+rect 7347 0 8037 254
+rect 8317 0 9247 254
+rect 9547 0 9613 254
+rect 9673 0 10269 115
+rect 10329 0 10565 254
+rect 10625 0 11221 100
+rect 11281 0 11347 254
+rect 11647 0 12537 254
+rect 12817 0 13707 254
+rect 14007 0 19000 254
+rect 35157 0 40000 254
+<< metal5 >>
+rect 0 35957 254 40800
+rect 0 14807 254 19797
+rect 0 13637 254 14487
+rect 0 12467 254 13317
+rect 0 10347 254 12147
+rect 0 9137 254 10027
+rect 0 8167 254 8817
+rect 0 7197 254 7847
+rect 0 5987 254 6877
+rect 0 4777 254 5667
+rect 0 3807 254 4457
+rect 0 2597 254 3487
+rect 0 1227 254 2277
+rect 427 0 1477 254
+rect 1797 0 2687 254
+rect 3007 0 3657 254
+rect 3977 0 4867 254
+rect 5187 0 6077 254
+rect 6397 0 7047 254
+rect 7367 0 8017 254
+rect 8337 0 9227 254
+rect 9547 0 11347 254
+rect 11667 0 12517 254
+rect 12837 0 13687 254
+rect 14007 0 18997 254
+rect 35157 0 40000 254
+use s8iom0s8_corner_bus_overlay  s8iom0s8_corner_bus_overlay_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1576765096
+transform 1 0 0 0 1 67
+box 0 0 40000 40733
+<< labels >>
+flabel metal5 s 0 10347 254 12147 3 FreeSans 520 0 0 0 vssa
+port 2 nsew
+flabel metal5 s 127 11205 127 11205 3 FreeSans 520 180 0 0 vssa
+port 2 nsew
+flabel metal5 s 0 7197 254 7847 3 FreeSans 520 180 0 0 vswitch
+port 4 nsew
+flabel metal5 s 0 5987 254 6877 3 FreeSans 520 180 0 0 vssio
+port 9 nsew
+flabel metal5 s 0 9137 254 10027 3 FreeSans 520 180 0 0 vssd
+port 10 nsew
+flabel metal5 s 0 8168 254 8817 3 FreeSans 520 180 0 0 vssa
+port 2 nsew
+flabel metal5 s 0 12467 254 13317 3 FreeSans 520 180 0 0 vssio_q
+port 11 nsew
+flabel metal5 s 0 13637 254 14487 3 FreeSans 520 180 0 0 vddio_q
+port 5 nsew
+flabel metal5 s 0 14807 254 19797 3 FreeSans 520 180 0 0 vddio
+port 7 nsew
+flabel metal5 s 0 3807 251 4457 3 FreeSans 520 180 0 0 vdda
+port 3 nsew
+flabel metal5 s 0 1227 254 2277 3 FreeSans 520 180 0 0 vcchib
+port 6 nsew
+flabel metal5 s 0 2597 254 3487 3 FreeSans 520 180 0 0 vccd
+port 8 nsew
+flabel metal5 s 0 4777 254 5667 3 FreeSans 520 180 0 0 vddio
+port 7 nsew
+flabel metal4 s 0 11425 100 12021 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 10473 115 11069 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 0 10347 254 10413 3 FreeSans 520 0 0 0 vssa
+port 2 nsew
+flabel metal4 s 0 1207 254 2297 3 FreeSans 520 180 0 0 vcchib
+port 6 nsew
+flabel metal4 s 0 2577 254 3507 3 FreeSans 520 180 0 0 vccd
+port 8 nsew
+flabel metal4 s 0 3787 251 4477 3 FreeSans 520 180 0 0 vdda
+port 3 nsew
+flabel metal4 s 0 4757 254 5687 3 FreeSans 520 180 0 0 vddio
+port 7 nsew
+flabel metal4 s 0 5967 254 6897 3 FreeSans 520 180 0 0 vssio
+port 9 nsew
+flabel metal4 s 0 7177 254 7867 3 FreeSans 520 180 0 0 vswitch
+port 4 nsew
+flabel metal4 s 0 8147 254 8837 3 FreeSans 520 180 0 0 vssa
+port 2 nsew
+flabel metal4 s 0 9117 254 10047 3 FreeSans 520 180 0 0 vssd
+port 10 nsew
+flabel metal4 s 0 11129 254 11365 3 FreeSans 520 0 0 0 vssa
+port 2 nsew
+flabel metal4 s 0 12081 254 12147 3 FreeSans 520 0 0 0 vssa
+port 2 nsew
+flabel metal4 s 0 12447 254 13337 3 FreeSans 520 180 0 0 vssio_q
+port 11 nsew
+flabel metal4 s 0 13617 254 14507 3 FreeSans 520 180 0 0 vddio_q
+port 5 nsew
+flabel metal4 s 0 14808 254 19800 3 FreeSans 520 180 0 0 vddio
+port 7 nsew
+flabel metal4 s 0 35957 254 40800 3 FreeSans 520 180 0 0 vssio
+port 9 nsew
+flabel metal4 s 127 38974 127 38974 3 FreeSans 520 180 0 0 vssio
+port 9 nsew
+flabel metal5 s 3977 0 4867 254 3 FreeSans 520 270 0 0 vddio
+port 7 nsew
+flabel metal5 s 1797 0 2687 254 3 FreeSans 520 270 0 0 vccd
+port 8 nsew
+flabel metal5 s 427 0 1477 254 3 FreeSans 520 270 0 0 vcchib
+port 6 nsew
+flabel metal5 s 3007 0 3657 251 3 FreeSans 520 270 0 0 vdda
+port 3 nsew
+flabel metal5 s 14007 0 18997 254 3 FreeSans 520 270 0 0 vddio
+port 7 nsew
+flabel metal5 s 12837 0 13687 254 3 FreeSans 520 270 0 0 vddio_q
+port 5 nsew
+flabel metal5 s 11667 0 12517 254 3 FreeSans 520 270 0 0 vssio_q
+port 11 nsew
+flabel metal5 s 7368 0 8017 254 3 FreeSans 520 270 0 0 vssa
+port 2 nsew
+flabel metal5 s 8337 0 9227 254 3 FreeSans 520 270 0 0 vssd
+port 10 nsew
+flabel metal5 s 5187 0 6077 254 3 FreeSans 520 270 0 0 vssio
+port 9 nsew
+flabel metal5 s 6397 0 7047 254 3 FreeSans 520 270 0 0 vswitch
+port 4 nsew
+flabel metal5 s 9547 0 11347 254 3 FreeSans 520 270 0 0 vssa
+port 2 nsew
+flabel metal5 s 10258 127 10258 127 3 FreeSans 520 90 0 0 vssa
+port 2 nsew
+flabel metal4 s 14008 0 19000 254 3 FreeSans 520 270 0 0 vddio
+port 7 nsew
+flabel metal4 s 12817 0 13707 254 3 FreeSans 520 270 0 0 vddio_q
+port 5 nsew
+flabel metal4 s 11647 0 12537 254 3 FreeSans 520 270 0 0 vssio_q
+port 11 nsew
+flabel metal4 s 11281 0 11347 254 3 FreeSans 520 90 0 0 vssa
+port 2 nsew
+flabel metal4 s 10329 0 10565 254 3 FreeSans 520 90 0 0 vssa
+port 2 nsew
+flabel metal4 s 8317 0 9247 254 3 FreeSans 520 270 0 0 vssd
+port 10 nsew
+flabel metal4 s 7347 0 8037 254 3 FreeSans 520 270 0 0 vssa
+port 2 nsew
+flabel metal4 s 6377 0 7067 254 3 FreeSans 520 270 0 0 vswitch
+port 4 nsew
+flabel metal4 s 5167 0 6097 254 3 FreeSans 520 270 0 0 vssio
+port 9 nsew
+flabel metal4 s 3957 0 4887 254 3 FreeSans 520 270 0 0 vddio
+port 7 nsew
+flabel metal4 s 2987 0 3677 251 3 FreeSans 520 270 0 0 vdda
+port 3 nsew
+flabel metal4 s 1777 0 2707 254 3 FreeSans 520 270 0 0 vccd
+port 8 nsew
+flabel metal4 s 407 0 1497 254 3 FreeSans 520 270 0 0 vcchib
+port 6 nsew
+flabel metal4 s 9547 0 9613 254 3 FreeSans 520 90 0 0 vssa
+port 2 nsew
+flabel metal4 s 10625 0 11221 100 3 FreeSans 520 90 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 9673 0 10269 115 3 FreeSans 520 90 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 35157 0 40000 254 3 FreeSans 520 270 0 0 vssio
+port 9 nsew
+flabel metal4 s 38174 127 38174 127 3 FreeSans 520 270 0 0 vssio
+port 9 nsew
+<< properties >>
+string LEFclass ENDCAP TOPRIGHT
+string FIXED_BBOX 0 0 40000 40800
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_gpiov2_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_gpiov2_pad.mag
new file mode 100644
index 0000000..1fea0c1
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_gpiov2_pad.mag
@@ -0,0 +1,286 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1584473789
+<< metal1 >>
+rect 12486 -407 12538 -351
+<< metal2 >>
+rect 7956 15977 8019 15991
+rect 7956 15927 7969 15977
+tri 7969 15927 8019 15977 nw
+rect 675 -407 721 -361
+rect 1084 -407 1130 -328
+rect 1226 -407 1278 -355
+rect 2551 -407 2603 -363
+rect 3262 -407 3314 -306
+rect 4471 -407 4523 -340
+rect 5320 -407 5372 -379
+rect 5698 -407 5750 -355
+rect 6150 -407 6202 -351
+rect 6363 -407 6415 -363
+rect 7092 -407 7144 -351
+rect 7678 -407 7730 -318
+rect 9049 -407 9101 -355
+rect 9971 -407 10023 -355
+rect 13367 -407 13419 -355
+rect 13655 -407 13785 -363
+rect 15256 -407 15384 -363
+rect 15522 -407 15574 -363
+rect 15741 -407 15781 -363
+rect 15943 -407 15983 -215
+<< metal3 >>
+rect 80 -407 204 -244
+rect 9173 -407 9239 -355
+rect 12564 -407 12778 -260
+rect 15716 -407 15782 -254
+rect 15848 -407 15914 -244
+<< metal4 >>
+rect 0 34750 254 39593
+rect 15746 34750 16000 39593
+rect 0 13600 254 18593
+rect 15746 13600 16000 18593
+rect 0 12410 254 13300
+rect 15746 12410 16000 13300
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+rect 0 10874 254 10940
+rect 15746 10874 16000 10940
+rect 0 10218 100 10814
+rect 15746 10218 15846 10814
+rect 0 9922 254 10158
+rect 15746 9922 16000 10158
+rect 0 9266 116 9862
+rect 15746 9266 15862 9862
+rect 0 9140 254 9206
+rect 15746 9140 16000 9206
+rect 0 7910 254 8840
+rect 15746 7910 16000 8840
+rect 0 6940 254 7630
+rect 15746 6940 16000 7630
+rect 0 5970 254 6660
+rect 15746 5970 16000 6660
+rect 0 4760 254 5690
+rect 15746 4760 16000 5690
+rect 0 3550 254 4480
+rect 15746 3550 16000 4480
+rect 0 2580 254 3270
+rect 15746 2580 16000 3270
+rect 0 1370 254 2300
+rect 15746 1370 16000 2300
+rect 0 0 254 1090
+rect 15746 0 16000 1090
+<< metal5 >>
+rect 0 34750 254 39593
+rect 15746 34750 16000 39593
+rect 6423 24687 10731 28996
+rect 0 13600 254 18590
+rect 15746 13600 16000 18590
+rect 0 12430 254 13280
+rect 15746 12430 16000 13280
+rect 0 11260 254 12110
+rect 15746 11260 16000 12110
+rect 0 9140 254 10940
+rect 15746 9140 16000 10940
+rect 0 7930 254 8820
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+rect 0 5990 254 6640
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+rect 15746 4780 16000 5670
+rect 0 3570 254 4460
+rect 15746 3570 16000 4460
+rect 0 2600 254 3250
+rect 15746 2600 16000 3250
+rect 0 1390 254 2280
+rect 15746 1390 16000 2280
+rect 0 20 254 1070
+rect 15746 20 16000 1070
+use s8iom0s8_overlay_gpiov2  s8iom0s8_overlay_gpiov2_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -407
+box 0 407 16000 40000
+use s8iom0s8_top_gpiov2  s8iom0s8_top_gpiov2_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -407
+box -143 -7 16134 40000
+<< labels >>
+flabel metal4 s 127 37925 127 37925 3 FreeSans 520 0 0 0 vssio
+port 35 nsew
+flabel metal5 s 0 13600 254 18590 3 FreeSans 520 0 0 0 vddio
+port 31 nsew
+flabel metal5 s 0 7930 254 8820 3 FreeSans 520 0 0 0 vssd
+port 34 nsew
+flabel metal5 s 0 11260 254 12110 3 FreeSans 520 0 0 0 vssio_q
+port 36 nsew
+flabel metal5 s 0 5990 254 6640 3 FreeSans 520 0 0 0 vswitch
+port 37 nsew
+flabel metal5 s 0 4780 254 5670 3 FreeSans 520 0 0 0 vssio
+port 35 nsew
+flabel metal5 s 0 2600 193 3250 3 FreeSans 520 0 0 0 vdda
+port 30 nsew
+flabel metal5 s 0 3570 254 4460 3 FreeSans 520 0 0 0 vddio
+port 31 nsew
+flabel metal5 s 0 1390 254 2280 3 FreeSans 520 0 0 0 vccd
+port 28 nsew
+flabel metal5 s 0 12430 254 13280 3 FreeSans 520 0 0 0 vddio_q
+port 32 nsew
+flabel metal5 s 0 9140 254 10940 3 FreeSans 520 0 0 0 vssa
+port 33 nsew
+flabel metal5 s 0 6961 254 7610 3 FreeSans 520 0 0 0 vssa
+port 33 nsew
+flabel metal5 s 0 20 254 1070 3 FreeSans 520 0 0 0 vcchib
+port 29 nsew
+flabel metal4 s 0 34750 254 39593 3 FreeSans 520 0 0 0 vssio
+port 35 nsew
+flabel metal4 s 0 3550 254 4480 3 FreeSans 520 0 0 0 vddio
+port 31 nsew
+flabel metal4 s 0 12410 254 13300 3 FreeSans 520 0 0 0 vddio_q
+port 32 nsew
+flabel metal4 s 0 13600 254 18593 3 FreeSans 520 0 0 0 vddio
+port 31 nsew
+flabel metal4 s 0 1370 254 2300 3 FreeSans 520 0 0 0 vccd
+port 28 nsew
+flabel metal4 s 0 9140 254 9206 3 FreeSans 520 0 0 0 vssa
+port 33 nsew
+flabel metal4 s 0 5970 254 6660 3 FreeSans 520 0 0 0 vswitch
+port 37 nsew
+flabel metal4 s 0 9922 254 10158 3 FreeSans 520 0 0 0 vssa
+port 33 nsew
+flabel metal4 s 0 11240 254 12130 3 FreeSans 520 0 0 0 vssio_q
+port 36 nsew
+flabel metal4 s 0 4760 254 5690 3 FreeSans 520 0 0 0 vssio
+port 35 nsew
+flabel metal4 s 0 2580 193 3270 3 FreeSans 520 0 0 0 vdda
+port 30 nsew
+flabel metal4 s 0 10218 254 10814 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 10874 254 10940 3 FreeSans 520 0 0 0 vssa
+port 33 nsew
+flabel metal4 s 0 6940 254 7630 3 FreeSans 520 0 0 0 vssa
+port 33 nsew
+flabel metal4 s 0 7910 254 8840 3 FreeSans 520 0 0 0 vssd
+port 34 nsew
+flabel metal4 s 0 9266 254 9862 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 0 0 254 1090 3 FreeSans 520 0 0 0 vcchib
+port 29 nsew
+flabel metal4 s 15873 37925 15873 37925 3 FreeSans 520 180 0 0 vssio
+port 35 nsew
+flabel metal5 s 15746 9140 16000 10940 3 FreeSans 520 180 0 0 vssa
+port 33 nsew
+flabel metal5 s 15807 2600 16000 3250 3 FreeSans 520 180 0 0 vdda
+port 30 nsew
+flabel metal5 s 15746 7930 16000 8820 3 FreeSans 520 180 0 0 vssd
+port 34 nsew
+flabel metal5 s 15746 11260 16000 12110 3 FreeSans 520 180 0 0 vssio_q
+port 36 nsew
+flabel metal5 s 15746 4780 16000 5670 3 FreeSans 520 180 0 0 vssio
+port 35 nsew
+flabel metal5 s 15746 5990 16000 6640 3 FreeSans 520 180 0 0 vswitch
+port 37 nsew
+flabel metal5 s 15746 6961 16000 7610 3 FreeSans 520 180 0 0 vssa
+port 33 nsew
+flabel metal5 s 15746 1390 16000 2280 3 FreeSans 520 180 0 0 vccd
+port 28 nsew
+flabel metal5 s 15746 12430 16000 13280 3 FreeSans 520 180 0 0 vddio_q
+port 32 nsew
+flabel metal5 s 15746 13600 16000 18590 3 FreeSans 520 180 0 0 vddio
+port 31 nsew
+flabel metal5 s 15746 20 16000 1070 3 FreeSans 520 180 0 0 vcchib
+port 29 nsew
+flabel metal5 s 15746 3570 16000 4460 3 FreeSans 520 180 0 0 vddio
+port 31 nsew
+flabel metal4 s 15746 7910 16000 8840 3 FreeSans 520 180 0 0 vssd
+port 34 nsew
+flabel metal4 s 15807 2580 16000 3270 3 FreeSans 520 180 0 0 vdda
+port 30 nsew
+flabel metal4 s 15746 11240 16000 12130 3 FreeSans 520 180 0 0 vssio_q
+port 36 nsew
+flabel metal4 s 15746 4760 16000 5690 3 FreeSans 520 180 0 0 vssio
+port 35 nsew
+flabel metal4 s 15746 5970 16000 6660 3 FreeSans 520 180 0 0 vswitch
+port 37 nsew
+flabel metal4 s 15746 9922 16000 10158 3 FreeSans 520 180 0 0 vssa
+port 33 nsew
+flabel metal4 s 15746 10874 16000 10940 3 FreeSans 520 180 0 0 vssa
+port 33 nsew
+flabel metal4 s 15746 3550 16000 4480 3 FreeSans 520 180 0 0 vddio
+port 31 nsew
+flabel metal4 s 15746 9140 16000 9206 3 FreeSans 520 180 0 0 vssa
+port 33 nsew
+flabel metal4 s 15746 6940 16000 7630 3 FreeSans 520 180 0 0 vssa
+port 33 nsew
+flabel metal4 s 15746 12410 16000 13300 3 FreeSans 520 180 0 0 vddio_q
+port 32 nsew
+flabel metal4 s 15746 1370 16000 2300 3 FreeSans 520 180 0 0 vccd
+port 28 nsew
+flabel metal4 s 15746 9266 16000 9862 3 FreeSans 520 180 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 15746 34750 16000 39593 3 FreeSans 520 180 0 0 vssio
+port 35 nsew
+flabel metal4 s 15746 10218 16000 10814 3 FreeSans 520 180 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 15746 13600 16000 18593 3 FreeSans 520 180 0 0 vddio
+port 31 nsew
+flabel metal4 s 15746 0 16000 1090 3 FreeSans 520 180 0 0 vcchib
+port 29 nsew
+flabel metal5 s 6423 24687 10731 28996 0 FreeSans 1600 0 0 0 pad
+port 21 nsew
+flabel metal3 s 80 -407 204 -244 0 FreeSans 640 0 0 0 in_h
+port 17 nsew
+flabel metal2 s 675 -407 721 -361 0 FreeSans 400 270 0 0 oe_n
+port 19 nsew
+flabel metal2 s 1084 -407 1130 -328 0 FreeSans 400 270 0 0 ib_mode_sel
+port 15 nsew
+flabel metal2 s 1226 -407 1278 -355 0 FreeSans 400 270 0 0 vtrip_sel
+port 38 nsew
+flabel metal2 s 2551 -407 2603 -363 0 FreeSans 400 270 0 0 enable_vdda_h
+port 10 nsew
+flabel metal2 s 3262 -407 3314 -306 0 FreeSans 400 270 0 0 enable_vswitch_h
+port 12 nsew
+flabel metal2 s 4471 -407 4523 -340 0 FreeSans 400 0 0 0 out
+port 20 nsew
+flabel metal2 s 5320 -407 5372 -379 0 FreeSans 400 270 0 0 hld_ovr
+port 14 nsew
+flabel metal2 s 5698 -407 5750 -355 0 FreeSans 400 270 0 0 dm<2>
+port 5 nsew
+flabel metal2 s 6150 -407 6202 -351 0 FreeSans 400 270 0 0 analog_sel
+port 4 nsew
+flabel metal2 s 6363 -407 6415 -363 0 FreeSans 400 270 0 0 hld_h_n
+port 13 nsew
+flabel metal2 s 7092 -407 7144 -351 0 FreeSans 400 270 0 0 enable_h
+port 8 nsew
+flabel metal2 s 7678 -407 7730 -318 0 FreeSans 400 270 0 0 enable_inp_h
+port 9 nsew
+flabel metal2 s 9049 -407 9101 -355 0 FreeSans 400 270 0 0 inp_dis
+port 18 nsew
+flabel metal3 s 9173 -407 9239 -355 0 FreeSans 400 270 0 0 analog_pol
+port 3 nsew
+flabel metal2 s 9971 -407 10023 -355 0 FreeSans 400 270 0 0 dm<0>
+port 7 nsew
+flabel metal1 s 12486 -407 12538 -351 0 FreeSans 400 270 0 0 analog_en
+port 2 nsew
+flabel metal2 s 13367 -407 13419 -355 0 FreeSans 400 270 0 0 dm<1>
+port 6 nsew
+flabel metal2 s 15522 -407 15574 -363 0 FreeSans 400 270 0 0 slow
+port 25 nsew
+flabel metal3 s 15848 -407 15914 -244 0 FreeSans 400 270 0 0 in
+port 16 nsew
+flabel metal3 s 12564 -407 12778 -260 0 FreeSans 400 270 0 0 pad_a_noesd_h
+port 24 nsew
+flabel metal2 s 13655 -407 13785 -363 0 FreeSans 400 270 0 0 pad_a_esd_1_h
+port 23 nsew
+flabel metal2 s 15256 -407 15384 -363 0 FreeSans 400 270 0 0 pad_a_esd_0_h
+port 22 nsew
+flabel metal2 s 15943 -407 15983 -215 0 FreeSans 400 270 0 0 tie_lo_esd
+port 27 nsew
+flabel metal2 s 15741 -407 15781 -363 0 FreeSans 400 270 0 0 tie_hi_esd
+port 26 nsew
+flabel metal3 s 15716 -407 15782 -254 0 FreeSans 400 270 0 0 enable_vddio
+port 11 nsew
+<< properties >>
+string LEFclass PAD INOUT
+string FIXED_BBOX 0 0 16000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_vccd_hvc_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_vccd_hvc_pad.mag
new file mode 100644
index 0000000..1e654d6
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_vccd_hvc_pad.mag
@@ -0,0 +1,223 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1585845698
+<< metal2 >>
+rect 99 -407 4879 -259
+rect 5179 -407 5579 -193
+rect 10078 -407 14858 -259
+<< metal3 >>
+rect 99 -407 4879 -16
+rect 5179 -407 7379 -259
+rect 7578 -407 9778 -89
+rect 10078 -407 14858 -16
+<< metal4 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 0 13600 254 18593
+rect 14746 13600 15000 18593
+rect 0 12410 254 13300
+rect 14746 12410 15000 13300
+rect 0 11240 254 12130
+rect 14746 11240 15000 12130
+rect 0 10874 254 10940
+rect 14746 10874 15000 10940
+rect 0 10218 100 10814
+rect 14746 10218 14846 10814
+rect 0 9922 254 10158
+rect 14746 9922 15000 10158
+rect 0 9266 116 9862
+rect 14746 9266 14862 9862
+rect 0 9140 254 9206
+rect 14746 9140 15000 9206
+rect 0 7910 254 8840
+rect 14746 7910 15000 8840
+rect 0 6940 254 7630
+rect 14746 6940 15000 7630
+rect 0 5970 254 6660
+rect 14746 5970 15000 6660
+rect 0 4760 254 5690
+rect 14746 4760 15000 5690
+rect 0 3550 254 4480
+rect 14746 3550 15000 4480
+rect 0 2580 254 3270
+rect 14746 2580 15000 3270
+rect 0 1370 254 2300
+rect 14746 1370 15000 2300
+rect 0 0 254 1090
+rect 14746 0 15000 1090
+<< metal5 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 7329 27458 7594 28780
+rect 0 13600 254 18590
+rect 14746 13600 15000 18590
+rect 0 12430 254 13280
+rect 14746 12430 15000 13280
+rect 0 11260 254 12110
+rect 14746 11260 15000 12110
+rect 0 9140 254 10940
+rect 14746 9140 15000 10940
+rect 0 7930 254 8820
+rect 14746 7930 15000 8820
+rect 0 6960 254 7610
+rect 14746 6960 15000 7610
+rect 0 5990 254 6640
+rect 14746 5990 15000 6640
+rect 0 4780 254 5670
+rect 14746 4780 15000 5670
+rect 0 3570 254 4460
+rect 14746 3570 15000 4460
+rect 0 2600 254 3250
+rect 14746 2600 15000 3250
+rect 0 1390 254 2280
+rect 14746 1390 15000 2280
+rect 0 20 254 1070
+rect 14746 20 15000 1070
+use s8iom0s8_overlay_vccd_hvc  s8iom0s8_overlay_vccd_hvc_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1585749841
+transform 1 0 0 0 1 -407
+box 0 407 15000 40000
+use s8iom0s8_top_power_hvc_wpad  s8iom0s8_top_power_hvc_wpad_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1585749839
+transform 1 0 0 0 1 -407
+box 0 0 15000 40000
+<< labels >>
+flabel metal5 s 7329 27458 7594 28780 0 FreeSans 2000 0 0 0 vccd
+port 11 nsew
+flabel metal4 s 127 37914 127 37914 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 14873 37914 14873 37914 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal2 s 10078 -407 14858 -259 2 FreeSans 2000 90 0 0 drn_hvc
+port 2 nsew
+flabel metal2 s 99 -407 4879 -259 2 FreeSans 2000 90 0 0 src_bdy_hvc
+port 4 nsew
+flabel metal3 s 7578 -407 9778 -89 0 FreeSans 2000 0 0 0 drn_hvc
+port 2 nsew
+flabel metal3 s 10078 -407 14858 -16 0 FreeSans 2000 0 0 0 vccd
+port 11 nsew
+flabel metal3 s 99 -407 4879 -16 0 FreeSans 2000 0 0 0 vccd
+port 11 nsew
+flabel metal3 s 5179 -407 7379 -259 2 FreeSans 2000 90 0 0 src_bdy_hvc
+port 4 nsew
+flabel metal5 s 14746 9140 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal5 s 14807 2600 15000 3250 3 FreeSans 520 180 0 0 vdda
+port 6 nsew
+flabel metal5 s 14746 7930 15000 8820 3 FreeSans 520 180 0 0 vssd
+port 13 nsew
+flabel metal5 s 14746 11260 15000 12110 3 FreeSans 520 180 0 0 vssio_q
+port 14 nsew
+flabel metal5 s 14746 4780 15000 5670 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal5 s 14746 5990 15000 6640 3 FreeSans 520 180 0 0 vswitch
+port 7 nsew
+flabel metal5 s 14746 6961 15000 7610 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal5 s 14746 1390 15000 2280 3 FreeSans 520 180 0 0 vccd
+port 11 nsew
+flabel metal5 s 14746 12430 15000 13280 3 FreeSans 520 180 0 0 vddio_q
+port 8 nsew
+flabel metal5 s 14746 13600 15000 18590 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal5 s 14746 20 15000 1070 3 FreeSans 520 180 0 0 vcchib
+port 9 nsew
+flabel metal5 s 14746 3570 15000 4460 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 13600 254 18590 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 7930 254 8820 3 FreeSans 520 0 0 0 vssd
+port 13 nsew
+flabel metal5 s 0 11260 254 12110 3 FreeSans 520 0 0 0 vssio_q
+port 14 nsew
+flabel metal5 s 0 5990 254 6640 3 FreeSans 520 0 0 0 vswitch
+port 7 nsew
+flabel metal5 s 0 4780 254 5670 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal5 s 0 2600 193 3250 3 FreeSans 520 0 0 0 vdda
+port 6 nsew
+flabel metal5 s 0 3570 254 4460 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 1390 254 2280 3 FreeSans 520 0 0 0 vccd
+port 11 nsew
+flabel metal5 s 0 12430 254 13280 3 FreeSans 520 0 0 0 vddio_q
+port 8 nsew
+flabel metal5 s 0 9140 254 10940 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal5 s 0 6961 254 7610 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal5 s 0 20 254 1070 3 FreeSans 520 0 0 0 vcchib
+port 9 nsew
+flabel metal4 s 14746 7910 15000 8840 3 FreeSans 520 180 0 0 vssd
+port 13 nsew
+flabel metal4 s 14807 2580 15000 3270 3 FreeSans 520 180 0 0 vdda
+port 6 nsew
+flabel metal4 s 14746 11240 15000 12130 3 FreeSans 520 180 0 0 vssio_q
+port 14 nsew
+flabel metal4 s 14746 4760 15000 5690 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal4 s 14746 5970 15000 6660 3 FreeSans 520 180 0 0 vswitch
+port 7 nsew
+flabel metal4 s 14746 9922 15000 10158 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 10874 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 0 15000 1090 3 FreeSans 520 180 0 0 vcchib
+port 9 nsew
+flabel metal4 s 14746 3550 15000 4480 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal4 s 14746 9140 15000 9206 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 6940 15000 7630 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 12410 15000 13300 3 FreeSans 520 180 0 0 vddio_q
+port 8 nsew
+flabel metal4 s 14746 1370 15000 2300 3 FreeSans 520 180 0 0 vccd
+port 11 nsew
+flabel metal4 s 14746 9266 15000 9862 3 FreeSans 520 180 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 14746 34750 15000 39593 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal4 s 14746 10218 15000 10814 3 FreeSans 520 180 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 14746 13600 15000 18593 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 34750 254 39593 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 0 3550 254 4480 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 12410 254 13300 3 FreeSans 520 0 0 0 vddio_q
+port 8 nsew
+flabel metal4 s 0 13600 254 18593 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 1370 254 2300 3 FreeSans 520 0 0 0 vccd
+port 11 nsew
+flabel metal4 s 0 9140 254 9206 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 5970 254 6660 3 FreeSans 520 0 0 0 vswitch
+port 7 nsew
+flabel metal4 s 0 0 254 1090 3 FreeSans 520 0 0 0 vcchib
+port 9 nsew
+flabel metal4 s 0 9922 254 10158 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 11240 254 12130 3 FreeSans 520 0 0 0 vssio_q
+port 14 nsew
+flabel metal4 s 0 4760 254 5690 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 0 2580 193 3270 3 FreeSans 520 0 0 0 vdda
+port 6 nsew
+flabel metal4 s 0 10218 254 10814 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 10874 254 10940 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 6940 254 7630 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 7910 254 8840 3 FreeSans 520 0 0 0 vssd
+port 13 nsew
+flabel metal4 s 0 9266 254 9862 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+<< properties >>
+string LEFclass PAD POWER
+string FIXED_BBOX 0 0 15000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_vccd_lvc_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_vccd_lvc_pad.mag
new file mode 100644
index 0000000..c3127e9
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_vccd_lvc_pad.mag
@@ -0,0 +1,230 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1584473789
+<< metal1 >>
+rect 6867 95 7067 195
+rect 5242 -7 5540 69
+<< metal2 >>
+rect 98 0 4099 287
+rect 6888 -7 8888 58
+rect 10953 -7 14940 715
+<< metal3 >>
+rect 98 0 4900 862
+rect 5200 -7 7374 918
+rect 7676 -7 9850 918
+rect 10151 -7 14940 862
+<< metal4 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 0 13600 254 18593
+rect 14746 13600 15000 18593
+rect 0 12410 254 13300
+rect 14746 12410 15000 13300
+rect 0 11240 254 12130
+rect 14746 11240 15000 12130
+rect 0 10874 254 10940
+rect 14746 10874 15000 10940
+rect 0 10218 100 10814
+rect 14746 10218 14846 10814
+rect 0 9922 254 10158
+rect 14746 9922 15000 10158
+rect 0 9266 116 9862
+rect 14746 9266 14862 9862
+rect 0 9140 254 9206
+rect 14746 9140 15000 9206
+rect 0 7910 254 8840
+rect 14746 7910 15000 8840
+rect 0 6940 254 7630
+rect 14746 6940 15000 7630
+rect 0 5970 254 6660
+rect 14746 5970 15000 6660
+rect 0 4760 254 5690
+rect 14746 4760 15000 5690
+rect 0 3550 254 4480
+rect 14746 3550 15000 4480
+rect 0 2580 254 3270
+rect 14746 2580 15000 3270
+rect 0 1370 254 2300
+rect 14746 1370 15000 2300
+rect 0 0 254 1090
+rect 14746 0 15000 1090
+<< metal5 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 6339 32546 10468 33417
+rect 0 13600 254 18590
+rect 14746 13600 15000 18590
+rect 0 12430 254 13280
+rect 14746 12430 15000 13280
+rect 0 11260 254 12110
+rect 14746 11260 15000 12110
+rect 0 9140 254 10940
+rect 14746 9140 15000 10940
+rect 0 7930 254 8820
+rect 14746 7930 15000 8820
+rect 0 6960 254 7610
+rect 14746 6960 15000 7610
+rect 0 5990 254 6640
+rect 14746 5990 15000 6640
+rect 0 4780 254 5670
+rect 14746 4780 15000 5670
+rect 0 3570 254 4460
+rect 14746 3570 15000 4460
+rect 0 2600 254 3250
+rect 14746 2600 15000 3250
+rect 0 1390 254 2280
+rect 14746 1390 15000 2280
+rect 0 20 254 1070
+rect 14746 20 15000 1070
+use s8iom0s8_overlay_vccd_lvc  s8iom0s8_overlay_vccd_lvc_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -7
+box 0 7 15000 39600
+use s8iom0s8_top_power_lvc_wpad  s8iom0s8_top_power_lvc_wpad_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -7
+box 0 0 15000 39600
+<< labels >>
+flabel metal4 s 14873 37925 14873 37925 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 127 37925 127 37925 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal5 s 6339 32546 10468 33417 0 FreeSans 2000 0 0 0 vccd
+port 15 nsew
+flabel metal2 s 100 -7 4099 287 0 FreeSans 2000 0 0 0 src_bdy_lvc1
+port 4 nsew
+flabel metal2 s 10953 -7 14940 715 0 FreeSans 2000 0 0 0 src_bdy_lvc2
+port 5 nsew
+flabel metal2 s 6888 -7 8888 58 0 FreeSans 400 0 0 0 bdy2_b2b
+port 6 nsew
+flabel metal3 s 7676 -7 9850 918 0 FreeSans 2000 0 0 0 drn_lvc2
+port 3 nsew
+flabel metal3 s 5200 -7 7374 918 0 FreeSans 2000 0 0 0 drn_lvc1
+port 2 nsew
+flabel metal3 s 10151 -7 14940 862 0 FreeSans 4000 0 0 0 vccd
+port 15 nsew
+flabel metal3 s 100 -7 4900 862 0 FreeSans 2000 0 0 0 vccd
+port 15 nsew
+flabel metal1 s 6867 95 7067 195 0 FreeSans 300 0 0 0 vssi
+port 7 nsew
+flabel metal5 s 14746 9140 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal5 s 14807 2600 15000 3250 3 FreeSans 520 180 0 0 vdda
+port 10 nsew
+flabel metal5 s 14746 7930 15000 8820 3 FreeSans 520 180 0 0 vssd
+port 17 nsew
+flabel metal5 s 14746 11260 15000 12110 3 FreeSans 520 180 0 0 vssio_q
+port 18 nsew
+flabel metal5 s 14746 4780 15000 5670 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal5 s 14746 5990 15000 6640 3 FreeSans 520 180 0 0 vswitch
+port 11 nsew
+flabel metal5 s 14746 6961 15000 7610 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal5 s 14746 1390 15000 2280 3 FreeSans 520 180 0 0 vccd
+port 15 nsew
+flabel metal5 s 14746 12430 15000 13280 3 FreeSans 520 180 0 0 vddio_q
+port 12 nsew
+flabel metal5 s 14746 13600 15000 18590 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal5 s 14746 20 15000 1070 3 FreeSans 520 180 0 0 vcchib
+port 13 nsew
+flabel metal5 s 14746 3570 15000 4460 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 13600 254 18590 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 7930 254 8820 3 FreeSans 520 0 0 0 vssd
+port 17 nsew
+flabel metal5 s 0 11260 254 12110 3 FreeSans 520 0 0 0 vssio_q
+port 18 nsew
+flabel metal5 s 0 5990 254 6640 3 FreeSans 520 0 0 0 vswitch
+port 11 nsew
+flabel metal5 s 0 4780 254 5670 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal5 s 0 2600 193 3250 3 FreeSans 520 0 0 0 vdda
+port 10 nsew
+flabel metal5 s 0 3570 254 4460 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 1390 254 2280 3 FreeSans 520 0 0 0 vccd
+port 15 nsew
+flabel metal5 s 0 12430 254 13280 3 FreeSans 520 0 0 0 vddio_q
+port 12 nsew
+flabel metal5 s 0 9140 254 10940 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal5 s 0 6961 254 7610 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal5 s 0 20 254 1070 3 FreeSans 520 0 0 0 vcchib
+port 13 nsew
+flabel metal4 s 14746 7910 15000 8840 3 FreeSans 520 180 0 0 vssd
+port 17 nsew
+flabel metal4 s 14807 2580 15000 3270 3 FreeSans 520 180 0 0 vdda
+port 10 nsew
+flabel metal4 s 14746 11240 15000 12130 3 FreeSans 520 180 0 0 vssio_q
+port 18 nsew
+flabel metal4 s 14746 4760 15000 5690 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 14746 5970 15000 6660 3 FreeSans 520 180 0 0 vswitch
+port 11 nsew
+flabel metal4 s 14746 9922 15000 10158 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 10874 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 0 15000 1090 3 FreeSans 520 180 0 0 vcchib
+port 13 nsew
+flabel metal4 s 14746 3550 15000 4480 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal4 s 14746 9140 15000 9206 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 6940 15000 7630 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 12410 15000 13300 3 FreeSans 520 180 0 0 vddio_q
+port 12 nsew
+flabel metal4 s 14746 1370 15000 2300 3 FreeSans 520 180 0 0 vccd
+port 15 nsew
+flabel metal4 s 14746 9266 15000 9862 3 FreeSans 520 180 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 14746 34750 15000 39593 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 14746 10218 15000 10814 3 FreeSans 520 180 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 14746 13600 15000 18593 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 34750 254 39593 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal4 s 0 3550 254 4480 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 12410 254 13300 3 FreeSans 520 0 0 0 vddio_q
+port 12 nsew
+flabel metal4 s 0 13600 254 18593 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 1370 254 2300 3 FreeSans 520 0 0 0 vccd
+port 15 nsew
+flabel metal4 s 0 9140 254 9206 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 5970 254 6660 3 FreeSans 520 0 0 0 vswitch
+port 11 nsew
+flabel metal4 s 0 0 254 1090 3 FreeSans 520 0 0 0 vcchib
+port 13 nsew
+flabel metal4 s 0 9922 254 10158 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 11240 254 12130 3 FreeSans 520 0 0 0 vssio_q
+port 18 nsew
+flabel metal4 s 0 4760 254 5690 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal4 s 0 2580 193 3270 3 FreeSans 520 0 0 0 vdda
+port 10 nsew
+flabel metal4 s 0 10218 254 10814 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 10874 254 10940 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 6940 254 7630 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 7910 254 8840 3 FreeSans 520 0 0 0 vssd
+port 17 nsew
+flabel metal4 s 0 9266 254 9862 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+<< properties >>
+string LEFclass PAD POWER
+string FIXED_BBOX 0 0 15000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_vdda_hvc_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_vdda_hvc_pad.mag
new file mode 100644
index 0000000..b81c352
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_vdda_hvc_pad.mag
@@ -0,0 +1,227 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1584473789
+<< metal2 >>
+rect 99 -407 4879 -259
+rect 5179 -407 5579 -211
+rect 10078 -407 14858 -259
+<< metal3 >>
+rect 99 -407 4879 -16
+rect 5179 -407 7379 -259
+rect 7578 -407 9778 -89
+rect 10078 -407 14858 -16
+<< metal4 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 0 13600 254 18593
+rect 14746 13600 15000 18593
+rect 0 12410 254 13300
+rect 14746 12410 15000 13300
+rect 0 11240 254 12130
+rect 14746 11240 15000 12130
+rect 0 10874 254 10940
+rect 14746 10874 15000 10940
+rect 0 10218 100 10814
+rect 14746 10218 14846 10814
+rect 0 9922 254 10158
+rect 14746 9922 15000 10158
+rect 0 9266 116 9862
+rect 14746 9266 14862 9862
+rect 0 9140 254 9206
+rect 14746 9140 15000 9206
+rect 0 7910 254 8840
+rect 14746 7910 15000 8840
+rect 0 6940 254 7630
+rect 14746 6940 15000 7630
+rect 0 5970 254 6660
+rect 14746 5970 15000 6660
+rect 0 4760 254 5690
+rect 14746 4760 15000 5690
+rect 0 3550 254 4480
+rect 14746 3550 15000 4480
+rect 0 2580 254 3270
+rect 14746 2580 15000 3270
+rect 0 1370 254 2300
+rect 14746 1370 15000 2300
+rect 0 0 254 1090
+rect 14746 0 15000 1090
+<< metal5 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 7329 27458 7594 28780
+rect 0 13600 254 18590
+rect 14746 13600 15000 18590
+rect 0 12430 254 13280
+rect 14746 12430 15000 13280
+rect 0 11260 254 12110
+rect 14746 11260 15000 12110
+rect 0 9140 254 10940
+rect 14746 9140 15000 10940
+rect 0 7930 254 8820
+rect 14746 7930 15000 8820
+rect 0 6960 254 7610
+rect 14746 6960 15000 7610
+rect 0 5990 254 6640
+rect 14746 5990 15000 6640
+rect 0 4780 254 5670
+rect 14746 4780 15000 5670
+rect 0 3570 254 4460
+rect 14746 3570 15000 4460
+rect 0 2600 254 3250
+rect 14746 2600 15000 3250
+rect 0 1390 254 2280
+rect 14746 1390 15000 2280
+rect 0 20 254 1070
+rect 14746 20 15000 1070
+use s8iom0s8_overlay_vccd_lvc  s8iom0s8_overlay_vccd_lvc_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -7
+box 0 7 15000 39600
+use s8iom0s8_top_power_hvc_wpad  s8iom0s8_top_power_hvc_wpad_1 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -407
+box 0 0 15000 40000
+<< labels >>
+flabel metal4 s 14873 37925 14873 37925 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal4 s 127 37925 127 37925 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal5 s 7329 27458 7594 28780 0 FreeSans 2000 0 0 0 vdda
+port 6 nsew
+flabel metal4 s 127 37914 127 37914 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 14873 37914 14873 37914 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal2 s 10078 -407 14858 -259 2 FreeSans 2000 90 0 0 drn_hvc
+port 2 nsew
+flabel metal2 s 99 -407 4879 -259 2 FreeSans 2000 90 0 0 src_bdy_hvc
+port 4 nsew
+flabel metal3 s 7578 -407 9778 -89 0 FreeSans 2000 0 0 0 drn_hvc
+port 2 nsew
+flabel metal3 s 10078 -407 14858 -16 0 FreeSans 2000 0 0 0 vdda
+port 6 nsew
+flabel metal3 s 99 -407 4879 -16 0 FreeSans 2000 0 0 0 vdda
+port 6 nsew
+flabel metal3 s 5179 -407 7379 -259 2 FreeSans 2000 90 0 0 src_bdy_hvc
+port 4 nsew
+flabel metal5 s 14746 9140 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal5 s 14807 2600 15000 3250 3 FreeSans 520 180 0 0 vdda
+port 6 nsew
+flabel metal5 s 14746 7930 15000 8820 3 FreeSans 520 180 0 0 vssd
+port 13 nsew
+flabel metal5 s 14746 11260 15000 12110 3 FreeSans 520 180 0 0 vssio_q
+port 14 nsew
+flabel metal5 s 14746 4780 15000 5670 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal5 s 14746 5990 15000 6640 3 FreeSans 520 180 0 0 vswitch
+port 7 nsew
+flabel metal5 s 14746 6961 15000 7610 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal5 s 14746 1390 15000 2280 3 FreeSans 520 180 0 0 vccd
+port 11 nsew
+flabel metal5 s 14746 12430 15000 13280 3 FreeSans 520 180 0 0 vddio_q
+port 8 nsew
+flabel metal5 s 14746 13600 15000 18590 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal5 s 14746 20 15000 1070 3 FreeSans 520 180 0 0 vcchib
+port 9 nsew
+flabel metal5 s 14746 3570 15000 4460 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 13600 254 18590 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 7930 254 8820 3 FreeSans 520 0 0 0 vssd
+port 13 nsew
+flabel metal5 s 0 11260 254 12110 3 FreeSans 520 0 0 0 vssio_q
+port 14 nsew
+flabel metal5 s 0 5990 254 6640 3 FreeSans 520 0 0 0 vswitch
+port 7 nsew
+flabel metal5 s 0 4780 254 5670 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal5 s 0 2600 193 3250 3 FreeSans 520 0 0 0 vdda
+port 6 nsew
+flabel metal5 s 0 3570 254 4460 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 1390 254 2280 3 FreeSans 520 0 0 0 vccd
+port 11 nsew
+flabel metal5 s 0 12430 254 13280 3 FreeSans 520 0 0 0 vddio_q
+port 8 nsew
+flabel metal5 s 0 9140 254 10940 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal5 s 0 6961 254 7610 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal5 s 0 20 254 1070 3 FreeSans 520 0 0 0 vcchib
+port 9 nsew
+flabel metal4 s 14746 7910 15000 8840 3 FreeSans 520 180 0 0 vssd
+port 13 nsew
+flabel metal4 s 14807 2580 15000 3270 3 FreeSans 520 180 0 0 vdda
+port 6 nsew
+flabel metal4 s 14746 11240 15000 12130 3 FreeSans 520 180 0 0 vssio_q
+port 14 nsew
+flabel metal4 s 14746 4760 15000 5690 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal4 s 14746 5970 15000 6660 3 FreeSans 520 180 0 0 vswitch
+port 7 nsew
+flabel metal4 s 14746 9922 15000 10158 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 10874 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 0 15000 1090 3 FreeSans 520 180 0 0 vcchib
+port 9 nsew
+flabel metal4 s 14746 3550 15000 4480 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal4 s 14746 9140 15000 9206 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 6940 15000 7630 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 12410 15000 13300 3 FreeSans 520 180 0 0 vddio_q
+port 8 nsew
+flabel metal4 s 14746 1370 15000 2300 3 FreeSans 520 180 0 0 vccd
+port 11 nsew
+flabel metal4 s 14746 9266 15000 9862 3 FreeSans 520 180 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 14746 34750 15000 39593 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal4 s 14746 10218 15000 10814 3 FreeSans 520 180 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 14746 13600 15000 18593 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 34750 254 39593 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 0 3550 254 4480 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 12410 254 13300 3 FreeSans 520 0 0 0 vddio_q
+port 8 nsew
+flabel metal4 s 0 13600 254 18593 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 1370 254 2300 3 FreeSans 520 0 0 0 vccd
+port 11 nsew
+flabel metal4 s 0 9140 254 9206 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 5970 254 6660 3 FreeSans 520 0 0 0 vswitch
+port 7 nsew
+flabel metal4 s 0 0 254 1090 3 FreeSans 520 0 0 0 vcchib
+port 9 nsew
+flabel metal4 s 0 9922 254 10158 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 11240 254 12130 3 FreeSans 520 0 0 0 vssio_q
+port 14 nsew
+flabel metal4 s 0 4760 254 5690 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 0 2580 193 3270 3 FreeSans 520 0 0 0 vdda
+port 6 nsew
+flabel metal4 s 0 10218 254 10814 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 10874 254 10940 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 6940 254 7630 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 7910 254 8840 3 FreeSans 520 0 0 0 vssd
+port 13 nsew
+flabel metal4 s 0 9266 254 9862 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+<< properties >>
+string LEFclass PAD POWER
+string FIXED_BBOX 0 0 15000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_vdda_lvc_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_vdda_lvc_pad.mag
new file mode 100644
index 0000000..6cd80a1
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_vdda_lvc_pad.mag
@@ -0,0 +1,226 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1584473789
+<< metal1 >>
+rect 6867 95 7067 195
+rect 5242 -7 5540 61
+<< metal2 >>
+rect 98 0 4099 287
+rect 6888 -7 8888 58
+rect 10953 -7 14940 715
+<< metal3 >>
+rect 98 0 4900 862
+rect 5200 -7 7374 918
+rect 7676 -7 9850 918
+rect 10151 -7 14940 862
+<< metal4 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 0 13600 254 18593
+rect 14746 13600 15000 18593
+rect 0 12410 254 13300
+rect 14746 12410 15000 13300
+rect 0 11240 254 12130
+rect 14746 11240 15000 12130
+rect 0 10874 254 10940
+rect 14746 10874 15000 10940
+rect 0 10218 100 10814
+rect 14746 10218 14846 10814
+rect 0 9922 254 10158
+rect 14746 9922 15000 10158
+rect 0 9266 116 9862
+rect 14746 9266 14862 9862
+rect 0 9140 254 9206
+rect 14746 9140 15000 9206
+rect 0 7910 254 8840
+rect 14746 7910 15000 8840
+rect 0 6940 254 7630
+rect 14746 6940 15000 7630
+rect 0 5970 254 6660
+rect 14746 5970 15000 6660
+rect 0 4760 254 5690
+rect 14746 4760 15000 5690
+rect 0 3550 254 4480
+rect 14746 3550 15000 4480
+rect 0 2580 254 3270
+rect 14746 2580 15000 3270
+rect 0 1370 254 2300
+rect 14746 1370 15000 2300
+rect 0 0 254 1090
+rect 14746 0 15000 1090
+<< metal5 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 6339 32546 10467 33417
+rect 0 13600 254 18590
+rect 14746 13600 15000 18590
+rect 0 12430 254 13280
+rect 14746 12430 15000 13280
+rect 0 11260 254 12110
+rect 14746 11260 15000 12110
+rect 0 9140 254 10940
+rect 14746 9140 15000 10940
+rect 0 7930 254 8820
+rect 14746 7930 15000 8820
+rect 0 6960 254 7610
+rect 14746 6960 15000 7610
+rect 0 5990 254 6640
+rect 14746 5990 15000 6640
+rect 0 4780 254 5670
+rect 14746 4780 15000 5670
+rect 0 3570 254 4460
+rect 14746 3570 15000 4460
+rect 0 2600 254 3250
+rect 14746 2600 15000 3250
+rect 0 1390 254 2280
+rect 14746 1390 15000 2280
+rect 0 20 254 1070
+rect 14746 20 15000 1070
+use s8iom0s8_overlay_vdda_lvc  s8iom0s8_overlay_vdda_lvc_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -7
+box 0 7 15000 39600
+use s8iom0s8_top_power_lvc_wpad  s8iom0s8_top_power_lvc_wpad_1 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -7
+box 0 0 15000 39600
+<< labels >>
+flabel metal2 s 100 -7 4099 287 0 FreeSans 2000 0 0 0 src_bdy_lvc1
+port 4 nsew
+flabel metal2 s 10953 -7 14940 715 0 FreeSans 2000 0 0 0 src_bdy_lvc2
+port 5 nsew
+flabel metal2 s 6888 -7 8888 58 0 FreeSans 400 0 0 0 bdy2_b2b
+port 6 nsew
+flabel metal3 s 7676 -7 9850 918 0 FreeSans 2000 0 0 0 drn_lvc2
+port 3 nsew
+flabel metal3 s 5200 -7 7374 918 0 FreeSans 2000 0 0 0 drn_lvc1
+port 2 nsew
+flabel metal3 s 10151 -7 14940 862 0 FreeSans 4000 0 0 0 vdda
+port 10 nsew
+flabel metal3 s 100 -7 4900 862 0 FreeSans 2000 0 0 0 vdda
+port 10 nsew
+flabel metal1 s 6867 95 7067 195 0 FreeSans 300 0 0 0 vssi
+port 7 nsew
+flabel metal5 s 14746 9140 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal5 s 14807 2600 15000 3250 3 FreeSans 520 180 0 0 vdda
+port 10 nsew
+flabel metal5 s 14746 7930 15000 8820 3 FreeSans 520 180 0 0 vssd
+port 17 nsew
+flabel metal5 s 14746 11260 15000 12110 3 FreeSans 520 180 0 0 vssio_q
+port 18 nsew
+flabel metal5 s 14746 4780 15000 5670 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal5 s 14746 5990 15000 6640 3 FreeSans 520 180 0 0 vswitch
+port 11 nsew
+flabel metal5 s 14746 6961 15000 7610 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal5 s 14746 1390 15000 2280 3 FreeSans 520 180 0 0 vccd
+port 15 nsew
+flabel metal5 s 14746 12430 15000 13280 3 FreeSans 520 180 0 0 vddio_q
+port 12 nsew
+flabel metal5 s 14746 13600 15000 18590 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal5 s 14746 20 15000 1070 3 FreeSans 520 180 0 0 vcchib
+port 13 nsew
+flabel metal5 s 14746 3570 15000 4460 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 13600 254 18590 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 7930 254 8820 3 FreeSans 520 0 0 0 vssd
+port 17 nsew
+flabel metal5 s 0 11260 254 12110 3 FreeSans 520 0 0 0 vssio_q
+port 18 nsew
+flabel metal5 s 0 5990 254 6640 3 FreeSans 520 0 0 0 vswitch
+port 11 nsew
+flabel metal5 s 0 4780 254 5670 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal5 s 0 2600 193 3250 3 FreeSans 520 0 0 0 vdda
+port 10 nsew
+flabel metal5 s 0 3570 254 4460 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 1390 254 2280 3 FreeSans 520 0 0 0 vccd
+port 15 nsew
+flabel metal5 s 0 12430 254 13280 3 FreeSans 520 0 0 0 vddio_q
+port 12 nsew
+flabel metal5 s 0 9140 254 10940 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal5 s 0 6961 254 7610 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal5 s 0 20 254 1070 3 FreeSans 520 0 0 0 vcchib
+port 13 nsew
+flabel metal4 s 14746 7910 15000 8840 3 FreeSans 520 180 0 0 vssd
+port 17 nsew
+flabel metal4 s 14807 2580 15000 3270 3 FreeSans 520 180 0 0 vdda
+port 10 nsew
+flabel metal4 s 14746 11240 15000 12130 3 FreeSans 520 180 0 0 vssio_q
+port 18 nsew
+flabel metal4 s 14746 4760 15000 5690 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 14746 5970 15000 6660 3 FreeSans 520 180 0 0 vswitch
+port 11 nsew
+flabel metal4 s 14746 9922 15000 10158 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 10874 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 0 15000 1090 3 FreeSans 520 180 0 0 vcchib
+port 13 nsew
+flabel metal4 s 14746 3550 15000 4480 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal4 s 14746 9140 15000 9206 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 6940 15000 7630 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 12410 15000 13300 3 FreeSans 520 180 0 0 vddio_q
+port 12 nsew
+flabel metal4 s 14746 1370 15000 2300 3 FreeSans 520 180 0 0 vccd
+port 15 nsew
+flabel metal4 s 14746 9266 15000 9862 3 FreeSans 520 180 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 14746 34750 15000 39593 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 14746 10218 15000 10814 3 FreeSans 520 180 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 14746 13600 15000 18593 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 34750 254 39593 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal4 s 0 3550 254 4480 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 12410 254 13300 3 FreeSans 520 0 0 0 vddio_q
+port 12 nsew
+flabel metal4 s 0 13600 254 18593 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 1370 254 2300 3 FreeSans 520 0 0 0 vccd
+port 15 nsew
+flabel metal4 s 0 9140 254 9206 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 5970 254 6660 3 FreeSans 520 0 0 0 vswitch
+port 11 nsew
+flabel metal4 s 0 0 254 1090 3 FreeSans 520 0 0 0 vcchib
+port 13 nsew
+flabel metal4 s 0 9922 254 10158 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 11240 254 12130 3 FreeSans 520 0 0 0 vssio_q
+port 18 nsew
+flabel metal4 s 0 4760 254 5690 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal4 s 0 2580 193 3270 3 FreeSans 520 0 0 0 vdda
+port 10 nsew
+flabel metal4 s 0 10218 254 10814 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 10874 254 10940 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 6940 254 7630 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 7910 254 8840 3 FreeSans 520 0 0 0 vssd
+port 17 nsew
+flabel metal4 s 0 9266 254 9862 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+flabel metal5 s 6339 32546 10468 33417 0 FreeSans 2000 0 0 0 vdda
+port 10 nsew
+<< properties >>
+string LEFclass PAD POWER
+string FIXED_BBOX 0 0 15000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_vddio_hvc_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_vddio_hvc_pad.mag
new file mode 100644
index 0000000..2f50667
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_vddio_hvc_pad.mag
@@ -0,0 +1,223 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1585845698
+<< metal2 >>
+rect 99 -407 4879 -259
+rect 5179 -407 5579 -210
+rect 10078 -407 14858 -259
+<< metal3 >>
+rect 99 -407 4879 -16
+rect 5179 -407 7379 -259
+rect 7578 -407 9778 -89
+rect 10078 -407 14858 -16
+<< metal4 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 0 13600 254 18593
+rect 14746 13600 15000 18593
+rect 0 12410 254 13300
+rect 14746 12410 15000 13300
+rect 0 11240 254 12130
+rect 14746 11240 15000 12130
+rect 0 10874 254 10940
+rect 14746 10874 15000 10940
+rect 0 10218 100 10814
+rect 14746 10218 14846 10814
+rect 0 9922 254 10158
+rect 14746 9922 15000 10158
+rect 0 9266 116 9862
+rect 14746 9266 14862 9862
+rect 0 9140 254 9206
+rect 14746 9140 15000 9206
+rect 0 7910 254 8840
+rect 14746 7910 15000 8840
+rect 0 6940 254 7630
+rect 14746 6940 15000 7630
+rect 0 5970 254 6660
+rect 14746 5970 15000 6660
+rect 0 4760 254 5690
+rect 14746 4760 15000 5690
+rect 0 3550 254 4480
+rect 14746 3550 15000 4480
+rect 0 2580 254 3270
+rect 14746 2580 15000 3270
+rect 0 1370 254 2300
+rect 14746 1370 15000 2300
+rect 0 0 254 1090
+rect 14746 0 15000 1090
+<< metal5 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 7329 27458 7594 28780
+rect 0 13600 254 18590
+rect 14746 13600 15000 18590
+rect 0 12430 254 13280
+rect 14746 12430 15000 13280
+rect 0 11260 254 12110
+rect 14746 11260 15000 12110
+rect 0 9140 254 10940
+rect 14746 9140 15000 10940
+rect 0 7930 254 8820
+rect 14746 7930 15000 8820
+rect 0 6960 254 7610
+rect 14746 6960 15000 7610
+rect 0 5990 254 6640
+rect 14746 5990 15000 6640
+rect 0 4780 254 5670
+rect 14746 4780 15000 5670
+rect 0 3570 254 4460
+rect 14746 3570 15000 4460
+rect 0 2600 254 3250
+rect 14746 2600 15000 3250
+rect 0 1390 254 2280
+rect 14746 1390 15000 2280
+rect 0 20 254 1070
+rect 14746 20 15000 1070
+use s8iom0s8_overlay_vddio_hvc  s8iom0s8_overlay_vddio_hvc_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1585749841
+transform 1 0 0 0 1 -407
+box 0 407 15000 40000
+use s8iom0s8_top_power_hvc_wpad  s8iom0s8_top_power_hvc_wpad_2 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1585749839
+transform 1 0 0 0 1 -407
+box 0 0 15000 40000
+<< labels >>
+flabel metal5 s 7329 27458 7594 28780 0 FreeSans 2000 0 0 0 vddio
+port 10 nsew
+flabel metal4 s 127 37914 127 37914 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 14873 37914 14873 37914 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal2 s 10078 -407 14858 -259 2 FreeSans 2000 90 0 0 drn_hvc
+port 2 nsew
+flabel metal2 s 99 -407 4879 -259 2 FreeSans 2000 90 0 0 src_bdy_hvc
+port 4 nsew
+flabel metal3 s 7578 -407 9778 -89 0 FreeSans 2000 0 0 0 drn_hvc
+port 2 nsew
+flabel metal3 s 10078 -407 14858 -16 0 FreeSans 2000 0 0 0 vddio
+port 10 nsew
+flabel metal3 s 99 -407 4879 -16 0 FreeSans 2000 0 0 0 vddio
+port 10 nsew
+flabel metal3 s 5179 -407 7379 -259 2 FreeSans 2000 90 0 0 src_bdy_hvc
+port 4 nsew
+flabel metal5 s 14746 9140 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal5 s 14807 2600 15000 3250 3 FreeSans 520 180 0 0 vdda
+port 6 nsew
+flabel metal5 s 14746 7930 15000 8820 3 FreeSans 520 180 0 0 vssd
+port 13 nsew
+flabel metal5 s 14746 11260 15000 12110 3 FreeSans 520 180 0 0 vssio_q
+port 14 nsew
+flabel metal5 s 14746 4780 15000 5670 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal5 s 14746 5990 15000 6640 3 FreeSans 520 180 0 0 vswitch
+port 7 nsew
+flabel metal5 s 14746 6961 15000 7610 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal5 s 14746 1390 15000 2280 3 FreeSans 520 180 0 0 vccd
+port 11 nsew
+flabel metal5 s 14746 12430 15000 13280 3 FreeSans 520 180 0 0 vddio_q
+port 8 nsew
+flabel metal5 s 14746 13600 15000 18590 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal5 s 14746 20 15000 1070 3 FreeSans 520 180 0 0 vcchib
+port 9 nsew
+flabel metal5 s 14746 3570 15000 4460 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 13600 254 18590 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 7930 254 8820 3 FreeSans 520 0 0 0 vssd
+port 13 nsew
+flabel metal5 s 0 11260 254 12110 3 FreeSans 520 0 0 0 vssio_q
+port 14 nsew
+flabel metal5 s 0 5990 254 6640 3 FreeSans 520 0 0 0 vswitch
+port 7 nsew
+flabel metal5 s 0 4780 254 5670 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal5 s 0 2600 193 3250 3 FreeSans 520 0 0 0 vdda
+port 6 nsew
+flabel metal5 s 0 3570 254 4460 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 1390 254 2280 3 FreeSans 520 0 0 0 vccd
+port 11 nsew
+flabel metal5 s 0 12430 254 13280 3 FreeSans 520 0 0 0 vddio_q
+port 8 nsew
+flabel metal5 s 0 9140 254 10940 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal5 s 0 6961 254 7610 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal5 s 0 20 254 1070 3 FreeSans 520 0 0 0 vcchib
+port 9 nsew
+flabel metal4 s 14746 7910 15000 8840 3 FreeSans 520 180 0 0 vssd
+port 13 nsew
+flabel metal4 s 14807 2580 15000 3270 3 FreeSans 520 180 0 0 vdda
+port 6 nsew
+flabel metal4 s 14746 11240 15000 12130 3 FreeSans 520 180 0 0 vssio_q
+port 14 nsew
+flabel metal4 s 14746 4760 15000 5690 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal4 s 14746 5970 15000 6660 3 FreeSans 520 180 0 0 vswitch
+port 7 nsew
+flabel metal4 s 14746 9922 15000 10158 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 10874 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 0 15000 1090 3 FreeSans 520 180 0 0 vcchib
+port 9 nsew
+flabel metal4 s 14746 3550 15000 4480 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal4 s 14746 9140 15000 9206 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 6940 15000 7630 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 12410 15000 13300 3 FreeSans 520 180 0 0 vddio_q
+port 8 nsew
+flabel metal4 s 14746 1370 15000 2300 3 FreeSans 520 180 0 0 vccd
+port 11 nsew
+flabel metal4 s 14746 9266 15000 9862 3 FreeSans 520 180 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 14746 34750 15000 39593 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal4 s 14746 10218 15000 10814 3 FreeSans 520 180 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 14746 13600 15000 18593 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 34750 254 39593 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 0 3550 254 4480 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 12410 254 13300 3 FreeSans 520 0 0 0 vddio_q
+port 8 nsew
+flabel metal4 s 0 13600 254 18593 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 1370 254 2300 3 FreeSans 520 0 0 0 vccd
+port 11 nsew
+flabel metal4 s 0 9140 254 9206 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 5970 254 6660 3 FreeSans 520 0 0 0 vswitch
+port 7 nsew
+flabel metal4 s 0 0 254 1090 3 FreeSans 520 0 0 0 vcchib
+port 9 nsew
+flabel metal4 s 0 9922 254 10158 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 11240 254 12130 3 FreeSans 520 0 0 0 vssio_q
+port 14 nsew
+flabel metal4 s 0 4760 254 5690 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 0 2580 193 3270 3 FreeSans 520 0 0 0 vdda
+port 6 nsew
+flabel metal4 s 0 10218 254 10814 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 10874 254 10940 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 6940 254 7630 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 7910 254 8840 3 FreeSans 520 0 0 0 vssd
+port 13 nsew
+flabel metal4 s 0 9266 254 9862 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+<< properties >>
+string LEFclass PAD POWER
+string FIXED_BBOX 0 0 15000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_vddio_lvc_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_vddio_lvc_pad.mag
new file mode 100644
index 0000000..d2e943c
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_vddio_lvc_pad.mag
@@ -0,0 +1,225 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1584473789
+<< metal1 >>
+rect 6867 95 7067 195
+rect 5242 -7 5540 78
+<< metal2 >>
+rect 98 0 4099 287
+rect 6888 -7 8888 58
+rect 10953 -7 14940 715
+<< metal3 >>
+rect 98 0 4900 862
+rect 5200 -7 7374 918
+rect 7676 -7 9850 918
+rect 10151 -7 14940 862
+<< metal4 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 0 13600 254 18593
+rect 14746 13600 15000 18593
+rect 0 12410 254 13300
+rect 14746 12410 15000 13300
+rect 0 11240 254 12130
+rect 14746 11240 15000 12130
+rect 0 10874 254 10940
+rect 14746 10874 15000 10940
+rect 0 10218 100 10814
+rect 14746 10218 14846 10814
+rect 0 9922 254 10158
+rect 14746 9922 15000 10158
+rect 0 9266 116 9862
+rect 14746 9266 14862 9862
+rect 0 9140 254 9206
+rect 14746 9140 15000 9206
+rect 0 7910 254 8840
+rect 14746 7910 15000 8840
+rect 0 6940 254 7630
+rect 14746 6940 15000 7630
+rect 0 5970 254 6660
+rect 14746 5970 15000 6660
+rect 0 4760 254 5690
+rect 14746 4760 15000 5690
+rect 0 3550 254 4480
+rect 14746 3550 15000 4480
+rect 0 2580 254 3270
+rect 14746 2580 15000 3270
+rect 0 1370 254 2300
+rect 14746 1370 15000 2300
+rect 0 0 254 1090
+rect 14746 0 15000 1090
+<< metal5 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 0 13600 254 18590
+rect 14746 13600 15000 18590
+rect 0 12430 254 13280
+rect 14746 12430 15000 13280
+rect 0 11260 254 12110
+rect 14746 11260 15000 12110
+rect 0 9140 254 10940
+rect 14746 9140 15000 10940
+rect 0 7930 254 8820
+rect 14746 7930 15000 8820
+rect 0 6960 254 7610
+rect 14746 6960 15000 7610
+rect 0 5990 254 6640
+rect 14746 5990 15000 6640
+rect 0 4780 254 5670
+rect 14746 4780 15000 5670
+rect 0 3570 254 4460
+rect 14746 3570 15000 4460
+rect 0 2600 254 3250
+rect 14746 2600 15000 3250
+rect 0 1390 254 2280
+rect 14746 1390 15000 2280
+rect 0 20 254 1070
+rect 14746 20 15000 1070
+use s8iom0s8_overlay_vddio_lvc  s8iom0s8_overlay_vddio_lvc_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -7
+box 0 7 15000 39600
+use s8iom0s8_top_power_lvc_wpad  s8iom0s8_top_power_lvc_wpad_2 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -7
+box 0 0 15000 39600
+<< labels >>
+flabel metal5 s 6339 32546 10468 33417 0 FreeSans 2000 0 0 0 vddio
+port 14 nsew
+flabel metal2 s 100 -7 4099 287 0 FreeSans 2000 0 0 0 src_bdy_lvc1
+port 4 nsew
+flabel metal2 s 10953 -7 14940 715 0 FreeSans 2000 0 0 0 src_bdy_lvc2
+port 5 nsew
+flabel metal2 s 6888 -7 8888 58 0 FreeSans 400 0 0 0 bdy2_b2b
+port 6 nsew
+flabel metal3 s 7676 -7 9850 918 0 FreeSans 2000 0 0 0 drn_lvc2
+port 3 nsew
+flabel metal3 s 5200 -7 7374 918 0 FreeSans 2000 0 0 0 drn_lvc1
+port 2 nsew
+flabel metal3 s 10151 -7 14940 862 0 FreeSans 4000 0 0 0 vddio
+port 14 nsew
+flabel metal3 s 100 -7 4900 862 0 FreeSans 2000 0 0 0 vddio
+port 14 nsew
+flabel metal1 s 6867 95 7067 195 0 FreeSans 300 0 0 0 vssi
+port 7 nsew
+flabel metal5 s 14746 9140 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal5 s 14807 2600 15000 3250 3 FreeSans 520 180 0 0 vdda
+port 10 nsew
+flabel metal5 s 14746 7930 15000 8820 3 FreeSans 520 180 0 0 vssd
+port 17 nsew
+flabel metal5 s 14746 11260 15000 12110 3 FreeSans 520 180 0 0 vssio_q
+port 18 nsew
+flabel metal5 s 14746 4780 15000 5670 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal5 s 14746 5990 15000 6640 3 FreeSans 520 180 0 0 vswitch
+port 11 nsew
+flabel metal5 s 14746 6961 15000 7610 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal5 s 14746 1390 15000 2280 3 FreeSans 520 180 0 0 vccd
+port 15 nsew
+flabel metal5 s 14746 12430 15000 13280 3 FreeSans 520 180 0 0 vddio_q
+port 12 nsew
+flabel metal5 s 14746 13600 15000 18590 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal5 s 14746 20 15000 1070 3 FreeSans 520 180 0 0 vcchib
+port 13 nsew
+flabel metal5 s 14746 3570 15000 4460 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 13600 254 18590 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 7930 254 8820 3 FreeSans 520 0 0 0 vssd
+port 17 nsew
+flabel metal5 s 0 11260 254 12110 3 FreeSans 520 0 0 0 vssio_q
+port 18 nsew
+flabel metal5 s 0 5990 254 6640 3 FreeSans 520 0 0 0 vswitch
+port 11 nsew
+flabel metal5 s 0 4780 254 5670 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal5 s 0 2600 193 3250 3 FreeSans 520 0 0 0 vdda
+port 10 nsew
+flabel metal5 s 0 3570 254 4460 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 1390 254 2280 3 FreeSans 520 0 0 0 vccd
+port 15 nsew
+flabel metal5 s 0 12430 254 13280 3 FreeSans 520 0 0 0 vddio_q
+port 12 nsew
+flabel metal5 s 0 9140 254 10940 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal5 s 0 6961 254 7610 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal5 s 0 20 254 1070 3 FreeSans 520 0 0 0 vcchib
+port 13 nsew
+flabel metal4 s 14746 7910 15000 8840 3 FreeSans 520 180 0 0 vssd
+port 17 nsew
+flabel metal4 s 14807 2580 15000 3270 3 FreeSans 520 180 0 0 vdda
+port 10 nsew
+flabel metal4 s 14746 11240 15000 12130 3 FreeSans 520 180 0 0 vssio_q
+port 18 nsew
+flabel metal4 s 14746 4760 15000 5690 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 14746 5970 15000 6660 3 FreeSans 520 180 0 0 vswitch
+port 11 nsew
+flabel metal4 s 14746 9922 15000 10158 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 10874 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 0 15000 1090 3 FreeSans 520 180 0 0 vcchib
+port 13 nsew
+flabel metal4 s 14746 3550 15000 4480 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal4 s 14746 9140 15000 9206 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 6940 15000 7630 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 12410 15000 13300 3 FreeSans 520 180 0 0 vddio_q
+port 12 nsew
+flabel metal4 s 14746 1370 15000 2300 3 FreeSans 520 180 0 0 vccd
+port 15 nsew
+flabel metal4 s 14746 9266 15000 9862 3 FreeSans 520 180 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 14746 34750 15000 39593 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 14746 10218 15000 10814 3 FreeSans 520 180 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 14746 13600 15000 18593 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 34750 254 39593 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal4 s 0 3550 254 4480 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 12410 254 13300 3 FreeSans 520 0 0 0 vddio_q
+port 12 nsew
+flabel metal4 s 0 13600 254 18593 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 1370 254 2300 3 FreeSans 520 0 0 0 vccd
+port 15 nsew
+flabel metal4 s 0 9140 254 9206 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 5970 254 6660 3 FreeSans 520 0 0 0 vswitch
+port 11 nsew
+flabel metal4 s 0 0 254 1090 3 FreeSans 520 0 0 0 vcchib
+port 13 nsew
+flabel metal4 s 0 9922 254 10158 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 11240 254 12130 3 FreeSans 520 0 0 0 vssio_q
+port 18 nsew
+flabel metal4 s 0 4760 254 5690 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal4 s 0 2580 193 3270 3 FreeSans 520 0 0 0 vdda
+port 10 nsew
+flabel metal4 s 0 10218 254 10814 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 10874 254 10940 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 6940 254 7630 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 7910 254 8840 3 FreeSans 520 0 0 0 vssd
+port 17 nsew
+flabel metal4 s 0 9266 254 9862 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+<< properties >>
+string LEFclass PAD POWER
+string FIXED_BBOX 0 0 15000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_vssa_hvc_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_vssa_hvc_pad.mag
new file mode 100644
index 0000000..dc6ca8d
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_vssa_hvc_pad.mag
@@ -0,0 +1,225 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1584473789
+<< metal2 >>
+rect 99 -407 4879 -259
+rect 5179 -407 5579 -184
+rect 10078 -407 14858 -259
+<< metal3 >>
+rect 99 -407 4879 -16
+rect 5179 -407 7379 -259
+rect 7578 -407 9778 -89
+rect 10078 -407 14858 -16
+<< metal4 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 0 13600 254 18593
+rect 14746 13600 15000 18593
+rect 0 12410 254 13300
+rect 14746 12410 15000 13300
+rect 0 11240 254 12130
+rect 14746 11240 15000 12130
+rect 0 10874 254 10940
+rect 14746 10874 15000 10940
+rect 0 10218 100 10814
+rect 14746 10218 14846 10814
+rect 0 9922 254 10158
+rect 14746 9922 15000 10158
+rect 0 9266 116 9862
+rect 14746 9266 14862 9862
+rect 0 9140 254 9206
+rect 14746 9140 15000 9206
+rect 0 7910 254 8840
+rect 14746 7910 15000 8840
+rect 0 6940 254 7630
+rect 14746 6940 15000 7630
+rect 0 5970 254 6660
+rect 14746 5970 15000 6660
+rect 0 4760 254 5690
+rect 14746 4760 15000 5690
+rect 0 3550 254 4480
+rect 14746 3550 15000 4480
+rect 0 2580 254 3270
+rect 14746 2580 15000 3270
+rect 0 1370 254 2300
+rect 14746 1370 15000 2300
+rect 0 0 254 1090
+rect 14746 6 15000 1090
+rect 14746 0 14928 6
+rect 14939 3 15000 6
+<< metal5 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 7329 27458 7594 28780
+rect 0 13600 254 18590
+rect 14746 13600 15000 18590
+rect 0 12430 254 13280
+rect 14746 12430 15000 13280
+rect 0 11260 254 12110
+rect 14746 11260 15000 12110
+rect 0 9140 254 10940
+rect 14746 9140 15000 10940
+rect 0 7930 254 8820
+rect 14746 7930 15000 8820
+rect 0 6960 254 7610
+rect 14746 6960 15000 7610
+rect 0 5990 254 6640
+rect 14746 5990 15000 6640
+rect 0 4780 254 5670
+rect 14746 4780 15000 5670
+rect 0 3570 254 4460
+rect 14746 3570 15000 4460
+rect 0 2600 254 3250
+rect 14746 2600 15000 3250
+rect 0 1390 254 2280
+rect 14746 1390 15000 2280
+rect 0 20 254 1070
+rect 14746 20 15000 1070
+use s8iom0s8_overlay_vssa_hvc  s8iom0s8_overlay_vssa_hvc_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -407
+box 0 407 15000 40000
+use s8iom0s8_top_ground_hvc_wpad  s8iom0s8_top_ground_hvc_wpad_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -407
+box 0 0 15000 40000
+<< labels >>
+flabel metal5 s 7329 27458 7594 28780 0 FreeSans 2000 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 127 37914 127 37914 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 14873 37914 14873 37914 3 FreeSans 520 180 0 0 vssio
+port 15 nsew
+flabel metal2 s 10078 -407 14858 -259 2 FreeSans 2000 90 0 0 drn_hvc
+port 2 nsew
+flabel metal2 s 99 -407 4879 -259 2 FreeSans 2000 90 0 0 src_bdy_hvc
+port 4 nsew
+flabel metal3 s 7578 -407 9778 -89 0 FreeSans 2000 0 0 0 drn_hvc
+port 2 nsew
+flabel metal3 s 99 -407 4879 -16 0 FreeSans 2000 0 0 0 vssa
+port 5 nsew
+flabel metal3 s 10078 -407 14858 -16 0 FreeSans 2000 0 0 0 vssa
+port 5 nsew
+flabel metal3 s 5179 -407 7379 -259 2 FreeSans 2000 90 0 0 src_bdy_hvc
+port 4 nsew
+flabel metal5 s 14746 9140 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal5 s 14807 2600 15000 3250 3 FreeSans 520 180 0 0 vdda
+port 6 nsew
+flabel metal5 s 14746 7930 15000 8820 3 FreeSans 520 180 0 0 vssd
+port 13 nsew
+flabel metal5 s 14746 11260 15000 12110 3 FreeSans 520 180 0 0 vssio_q
+port 14 nsew
+flabel metal5 s 14746 4780 15000 5670 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal5 s 14746 5990 15000 6640 3 FreeSans 520 180 0 0 vswitch
+port 7 nsew
+flabel metal5 s 14746 6961 15000 7610 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal5 s 14746 1390 15000 2280 3 FreeSans 520 180 0 0 vccd
+port 11 nsew
+flabel metal5 s 14746 12430 15000 13280 3 FreeSans 520 180 0 0 vddio_q
+port 8 nsew
+flabel metal5 s 14746 13600 15000 18590 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal5 s 14746 20 15000 1070 3 FreeSans 520 180 0 0 vcchib
+port 9 nsew
+flabel metal5 s 14746 3570 15000 4460 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 13600 254 18590 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 7930 254 8820 3 FreeSans 520 0 0 0 vssd
+port 13 nsew
+flabel metal5 s 0 11260 254 12110 3 FreeSans 520 0 0 0 vssio_q
+port 14 nsew
+flabel metal5 s 0 5990 254 6640 3 FreeSans 520 0 0 0 vswitch
+port 7 nsew
+flabel metal5 s 0 4780 254 5670 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal5 s 0 2600 193 3250 3 FreeSans 520 0 0 0 vdda
+port 6 nsew
+flabel metal5 s 0 3570 254 4460 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 1390 254 2280 3 FreeSans 520 0 0 0 vccd
+port 11 nsew
+flabel metal5 s 0 12430 254 13280 3 FreeSans 520 0 0 0 vddio_q
+port 8 nsew
+flabel metal5 s 0 9140 254 10940 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal5 s 0 6961 254 7610 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal5 s 0 20 254 1070 3 FreeSans 520 0 0 0 vcchib
+port 9 nsew
+flabel metal4 s 14746 7910 15000 8840 3 FreeSans 520 180 0 0 vssd
+port 13 nsew
+flabel metal4 s 14807 2580 15000 3270 3 FreeSans 520 180 0 0 vdda
+port 6 nsew
+flabel metal4 s 14746 11240 15000 12130 3 FreeSans 520 180 0 0 vssio_q
+port 14 nsew
+flabel metal4 s 14746 4760 15000 5690 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal4 s 14746 5970 15000 6660 3 FreeSans 520 180 0 0 vswitch
+port 7 nsew
+flabel metal4 s 14746 9922 15000 10158 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 10874 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 0 15000 1090 3 FreeSans 520 180 0 0 vcchib
+port 9 nsew
+flabel metal4 s 14746 3550 15000 4480 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal4 s 14746 9140 15000 9206 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 6940 15000 7630 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 12410 15000 13300 3 FreeSans 520 180 0 0 vddio_q
+port 8 nsew
+flabel metal4 s 14746 1370 15000 2300 3 FreeSans 520 180 0 0 vccd
+port 11 nsew
+flabel metal4 s 14746 9266 15000 9862 3 FreeSans 520 180 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 14746 34750 15000 39593 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal4 s 14746 10218 15000 10814 3 FreeSans 520 180 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 14746 13600 15000 18593 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 34750 254 39593 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 0 3550 254 4480 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 12410 254 13300 3 FreeSans 520 0 0 0 vddio_q
+port 8 nsew
+flabel metal4 s 0 13600 254 18593 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 1370 254 2300 3 FreeSans 520 0 0 0 vccd
+port 11 nsew
+flabel metal4 s 0 9140 254 9206 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 5970 254 6660 3 FreeSans 520 0 0 0 vswitch
+port 7 nsew
+flabel metal4 s 0 0 254 1090 3 FreeSans 520 0 0 0 vcchib
+port 9 nsew
+flabel metal4 s 0 9922 254 10158 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 11240 254 12130 3 FreeSans 520 0 0 0 vssio_q
+port 14 nsew
+flabel metal4 s 0 4760 254 5690 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 0 2580 193 3270 3 FreeSans 520 0 0 0 vdda
+port 6 nsew
+flabel metal4 s 0 10218 254 10814 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 10874 254 10940 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 6940 254 7630 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 7910 254 8840 3 FreeSans 520 0 0 0 vssd
+port 13 nsew
+flabel metal4 s 0 9266 254 9862 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+<< properties >>
+string LEFclass PAD GROUND
+string FIXED_BBOX 0 0 15000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_vssa_lvc_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_vssa_lvc_pad.mag
new file mode 100644
index 0000000..c832fc1
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_vssa_lvc_pad.mag
@@ -0,0 +1,227 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1584473789
+<< metal1 >>
+rect 6867 95 7067 195
+rect 5242 -7 5540 84
+<< metal2 >>
+rect 100 0 4099 287
+rect 6888 -7 8888 58
+rect 10953 -7 14940 715
+<< metal3 >>
+rect 98 309 4900 862
+rect 100 0 4900 309
+rect 5200 -7 7374 918
+rect 7676 -7 9850 918
+rect 10151 -7 14940 862
+<< metal4 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 0 13600 254 18593
+rect 14746 13600 15000 18593
+rect 0 12410 254 13300
+rect 14746 12410 15000 13300
+rect 0 11240 254 12130
+rect 14746 11240 15000 12130
+rect 0 10874 254 10940
+rect 14746 10874 15000 10940
+rect 0 10218 100 10814
+rect 14746 10218 14846 10814
+rect 0 9922 254 10158
+rect 14746 9922 15000 10158
+rect 0 9266 116 9862
+rect 14746 9266 14862 9862
+rect 0 9140 254 9206
+rect 14746 9140 15000 9206
+rect 0 7910 254 8840
+rect 14746 7910 15000 8840
+rect 0 6940 254 7630
+rect 14746 6940 15000 7630
+rect 0 5970 254 6660
+rect 14746 5970 15000 6660
+rect 0 4760 254 5690
+rect 14746 4760 15000 5690
+rect 0 3550 254 4480
+rect 14746 3550 15000 4480
+rect 0 2580 254 3270
+rect 14746 2580 15000 3270
+rect 0 1370 254 2300
+rect 14746 1370 15000 2300
+rect 0 0 254 1090
+rect 14746 0 15000 1090
+<< metal5 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 6339 32546 10468 33417
+rect 0 13600 254 18590
+rect 14746 13600 15000 18590
+rect 0 12430 254 13280
+rect 14746 12430 15000 13280
+rect 0 11260 254 12110
+rect 14746 11260 15000 12110
+rect 0 9140 254 10940
+rect 14746 9140 15000 10940
+rect 0 7930 254 8820
+rect 14746 7930 15000 8820
+rect 0 6960 254 7610
+rect 14746 6960 15000 7610
+rect 0 5990 254 6640
+rect 14746 5990 15000 6640
+rect 0 4780 254 5670
+rect 14746 4780 15000 5670
+rect 0 3570 254 4460
+rect 14746 3570 15000 4460
+rect 0 2600 254 3250
+rect 14746 2600 15000 3250
+rect 0 1390 254 2280
+rect 14746 1390 15000 2280
+rect 0 20 254 1070
+rect 14746 20 15000 1070
+use s8iom0s8_overlay_vssa_lvc  s8iom0s8_overlay_vssa_lvc_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -7
+box 0 7 15000 39600
+use s8iom0s8_top_ground_lvc_wpad  s8iom0s8_top_ground_lvc_wpad_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -7
+box 0 0 15000 39600
+<< labels >>
+flabel metal4 s 0 9266 254 9862 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 0 7910 254 8840 3 FreeSans 520 0 0 0 vssd
+port 17 nsew
+flabel metal4 s 0 6940 254 7630 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 10874 254 10940 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 10218 254 10814 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 2580 193 3270 3 FreeSans 520 0 0 0 vdda
+port 10 nsew
+flabel metal4 s 0 4760 254 5690 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal4 s 0 11240 254 12130 3 FreeSans 520 0 0 0 vssio_q
+port 18 nsew
+flabel metal4 s 0 9922 254 10158 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 0 254 1090 3 FreeSans 520 0 0 0 vcchib
+port 13 nsew
+flabel metal4 s 0 5970 254 6660 3 FreeSans 520 0 0 0 vswitch
+port 11 nsew
+flabel metal4 s 0 9140 254 9206 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 1370 254 2300 3 FreeSans 520 0 0 0 vccd
+port 15 nsew
+flabel metal4 s 0 13600 254 18593 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 12410 254 13300 3 FreeSans 520 0 0 0 vddio_q
+port 12 nsew
+flabel metal4 s 0 3550 254 4480 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 34750 254 39593 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal4 s 14746 13600 15000 18593 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal4 s 14746 10218 15000 10814 3 FreeSans 520 180 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 14746 34750 15000 39593 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 14746 9266 15000 9862 3 FreeSans 520 180 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 14746 1370 15000 2300 3 FreeSans 520 180 0 0 vccd
+port 15 nsew
+flabel metal4 s 14746 12410 15000 13300 3 FreeSans 520 180 0 0 vddio_q
+port 12 nsew
+flabel metal4 s 14746 6940 15000 7630 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 9140 15000 9206 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 3550 15000 4480 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal4 s 14746 0 15000 1090 3 FreeSans 520 180 0 0 vcchib
+port 13 nsew
+flabel metal4 s 14746 10874 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 9922 15000 10158 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 5970 15000 6660 3 FreeSans 520 180 0 0 vswitch
+port 11 nsew
+flabel metal4 s 14746 4760 15000 5690 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 14746 11240 15000 12130 3 FreeSans 520 180 0 0 vssio_q
+port 18 nsew
+flabel metal4 s 14807 2580 15000 3270 3 FreeSans 520 180 0 0 vdda
+port 10 nsew
+flabel metal4 s 14746 7910 15000 8840 3 FreeSans 520 180 0 0 vssd
+port 17 nsew
+flabel metal5 s 0 20 254 1070 3 FreeSans 520 0 0 0 vcchib
+port 13 nsew
+flabel metal5 s 0 6961 254 7610 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal5 s 0 9140 254 10940 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal5 s 0 12430 254 13280 3 FreeSans 520 0 0 0 vddio_q
+port 12 nsew
+flabel metal5 s 0 1390 254 2280 3 FreeSans 520 0 0 0 vccd
+port 15 nsew
+flabel metal5 s 0 3570 254 4460 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 2600 193 3250 3 FreeSans 520 0 0 0 vdda
+port 10 nsew
+flabel metal5 s 0 4780 254 5670 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal5 s 0 5990 254 6640 3 FreeSans 520 0 0 0 vswitch
+port 11 nsew
+flabel metal5 s 0 11260 254 12110 3 FreeSans 520 0 0 0 vssio_q
+port 18 nsew
+flabel metal5 s 0 7930 254 8820 3 FreeSans 520 0 0 0 vssd
+port 17 nsew
+flabel metal5 s 0 13600 254 18590 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal5 s 14746 3570 15000 4460 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal5 s 14746 20 15000 1070 3 FreeSans 520 180 0 0 vcchib
+port 13 nsew
+flabel metal5 s 14746 13600 15000 18590 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal5 s 14746 12430 15000 13280 3 FreeSans 520 180 0 0 vddio_q
+port 12 nsew
+flabel metal5 s 14746 1390 15000 2280 3 FreeSans 520 180 0 0 vccd
+port 15 nsew
+flabel metal5 s 14746 6961 15000 7610 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal5 s 14746 5990 15000 6640 3 FreeSans 520 180 0 0 vswitch
+port 11 nsew
+flabel metal5 s 14746 4780 15000 5670 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal5 s 14746 11260 15000 12110 3 FreeSans 520 180 0 0 vssio_q
+port 18 nsew
+flabel metal5 s 14746 7930 15000 8820 3 FreeSans 520 180 0 0 vssd
+port 17 nsew
+flabel metal5 s 14807 2600 15000 3250 3 FreeSans 520 180 0 0 vdda
+port 10 nsew
+flabel metal5 s 14746 9140 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal1 s 6867 95 7067 195 0 FreeSans 300 0 0 0 vssi
+port 7 nsew
+flabel metal3 s 100 -7 4900 862 0 FreeSans 2000 0 0 0 vssa
+port 9 nsew
+flabel metal3 s 10151 -7 14940 862 0 FreeSans 4000 0 0 0 vssa
+port 9 nsew
+flabel metal3 s 5200 -7 7374 918 0 FreeSans 2000 0 0 0 drn_lvc1
+port 2 nsew
+flabel metal3 s 7676 -7 9850 918 0 FreeSans 2000 0 0 0 drn_lvc2
+port 3 nsew
+flabel metal2 s 6888 -7 8888 58 0 FreeSans 400 0 0 0 bdy2_b2b
+port 6 nsew
+flabel metal2 s 10953 -7 14940 715 0 FreeSans 2000 0 0 0 src_bdy_lvc2
+port 5 nsew
+flabel metal2 s 100 -7 4099 287 0 FreeSans 2000 0 0 0 src_bdy_lvc1
+port 4 nsew
+flabel metal5 s 6339 32546 10468 33417 0 FreeSans 2000 0 0 0 vssa
+port 9 nsew
+<< properties >>
+string LEFclass PAD GROUND
+string FIXED_BBOX 0 0 15000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_vssd_hvc_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_vssd_hvc_pad.mag
new file mode 100644
index 0000000..108c5f7
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_vssd_hvc_pad.mag
@@ -0,0 +1,223 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1584473789
+<< metal2 >>
+rect 99 -407 4879 -259
+rect 5179 -407 5579 -182
+rect 10078 -407 14858 -259
+<< metal3 >>
+rect 99 -407 4879 -16
+rect 5179 -407 7379 -259
+rect 7578 -407 9778 -89
+rect 10078 -407 14858 -16
+<< metal4 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 0 13600 254 18593
+rect 14746 13600 15000 18593
+rect 0 12410 254 13300
+rect 14746 12410 15000 13300
+rect 0 11240 254 12130
+rect 14746 11240 15000 12130
+rect 0 10874 254 10940
+rect 14746 10874 15000 10940
+rect 0 10218 100 10814
+rect 14746 10218 14846 10814
+rect 0 9922 254 10158
+rect 14746 9922 15000 10158
+rect 0 9266 116 9862
+rect 14746 9266 14862 9862
+rect 0 9140 254 9206
+rect 14746 9140 15000 9206
+rect 0 7910 254 8840
+rect 14746 7910 15000 8840
+rect 0 6940 254 7630
+rect 14746 6940 15000 7630
+rect 0 5970 254 6660
+rect 14746 5970 15000 6660
+rect 0 4760 254 5690
+rect 14746 4760 15000 5690
+rect 0 3550 254 4480
+rect 14746 3550 15000 4480
+rect 0 2580 254 3270
+rect 14746 2580 15000 3270
+rect 0 1370 254 2300
+rect 14746 1370 15000 2300
+rect 0 0 254 1090
+rect 14746 0 15000 1090
+<< metal5 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 7329 27458 7594 28780
+rect 0 13600 254 18590
+rect 14746 13600 15000 18590
+rect 0 12430 254 13280
+rect 14746 12430 15000 13280
+rect 0 11260 254 12110
+rect 14746 11260 15000 12110
+rect 0 9140 254 10940
+rect 14746 9140 15000 10940
+rect 0 7930 254 8820
+rect 14746 7930 15000 8820
+rect 0 6960 254 7610
+rect 14746 6960 15000 7610
+rect 0 5990 254 6640
+rect 14746 5990 15000 6640
+rect 0 4780 254 5670
+rect 14746 4780 15000 5670
+rect 0 3570 254 4460
+rect 14746 3570 15000 4460
+rect 0 2600 254 3250
+rect 14746 2600 15000 3250
+rect 0 1390 254 2280
+rect 14746 1390 15000 2280
+rect 0 20 254 1070
+rect 14746 20 15000 1070
+use s8iom0s8_overlay_vssd_hvc  s8iom0s8_overlay_vssd_hvc_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -407
+box 0 407 15000 40000
+use s8iom0s8_top_ground_hvc_wpad  s8iom0s8_top_ground_hvc_wpad_1 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -407
+box 0 0 15000 40000
+<< labels >>
+flabel metal5 s 7329 27458 7594 28780 0 FreeSans 2000 0 0 0 vssd
+port 13 nsew
+flabel metal4 s 127 37914 127 37914 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 14873 37914 14873 37914 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal2 s 10078 -407 14858 -259 2 FreeSans 2000 90 0 0 drn_hvc
+port 2 nsew
+flabel metal2 s 99 -407 4879 -259 2 FreeSans 2000 90 0 0 src_bdy_hvc
+port 4 nsew
+flabel metal3 s 7578 -407 9778 -89 0 FreeSans 2000 0 0 0 drn_hvc
+port 2 nsew
+flabel metal3 s 99 -407 4879 -16 0 FreeSans 2000 0 0 0 vssd
+port 13 nsew
+flabel metal3 s 10078 -407 14858 -16 0 FreeSans 2000 0 0 0 vssd
+port 13 nsew
+flabel metal3 s 5179 -407 7379 -259 2 FreeSans 2000 90 0 0 src_bdy_hvc
+port 4 nsew
+flabel metal5 s 14746 9140 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal5 s 14807 2600 15000 3250 3 FreeSans 520 180 0 0 vdda
+port 6 nsew
+flabel metal5 s 14746 7930 15000 8820 3 FreeSans 520 180 0 0 vssd
+port 13 nsew
+flabel metal5 s 14746 11260 15000 12110 3 FreeSans 520 180 0 0 vssio_q
+port 14 nsew
+flabel metal5 s 14746 4780 15000 5670 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal5 s 14746 5990 15000 6640 3 FreeSans 520 180 0 0 vswitch
+port 7 nsew
+flabel metal5 s 14746 6961 15000 7610 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal5 s 14746 1390 15000 2280 3 FreeSans 520 180 0 0 vccd
+port 11 nsew
+flabel metal5 s 14746 12430 15000 13280 3 FreeSans 520 180 0 0 vddio_q
+port 8 nsew
+flabel metal5 s 14746 13600 15000 18590 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal5 s 14746 20 15000 1070 3 FreeSans 520 180 0 0 vcchib
+port 9 nsew
+flabel metal5 s 14746 3570 15000 4460 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 13600 254 18590 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 7930 254 8820 3 FreeSans 520 0 0 0 vssd
+port 13 nsew
+flabel metal5 s 0 11260 254 12110 3 FreeSans 520 0 0 0 vssio_q
+port 14 nsew
+flabel metal5 s 0 5990 254 6640 3 FreeSans 520 0 0 0 vswitch
+port 7 nsew
+flabel metal5 s 0 4780 254 5670 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal5 s 0 2600 193 3250 3 FreeSans 520 0 0 0 vdda
+port 6 nsew
+flabel metal5 s 0 3570 254 4460 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 1390 254 2280 3 FreeSans 520 0 0 0 vccd
+port 11 nsew
+flabel metal5 s 0 12430 254 13280 3 FreeSans 520 0 0 0 vddio_q
+port 8 nsew
+flabel metal5 s 0 9140 254 10940 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal5 s 0 6961 254 7610 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal5 s 0 20 254 1070 3 FreeSans 520 0 0 0 vcchib
+port 9 nsew
+flabel metal4 s 14746 7910 15000 8840 3 FreeSans 520 180 0 0 vssd
+port 13 nsew
+flabel metal4 s 14807 2580 15000 3270 3 FreeSans 520 180 0 0 vdda
+port 6 nsew
+flabel metal4 s 14746 11240 15000 12130 3 FreeSans 520 180 0 0 vssio_q
+port 14 nsew
+flabel metal4 s 14746 4760 15000 5690 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal4 s 14746 5970 15000 6660 3 FreeSans 520 180 0 0 vswitch
+port 7 nsew
+flabel metal4 s 14746 9922 15000 10158 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 10874 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 0 15000 1090 3 FreeSans 520 180 0 0 vcchib
+port 9 nsew
+flabel metal4 s 14746 3550 15000 4480 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal4 s 14746 9140 15000 9206 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 6940 15000 7630 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 12410 15000 13300 3 FreeSans 520 180 0 0 vddio_q
+port 8 nsew
+flabel metal4 s 14746 1370 15000 2300 3 FreeSans 520 180 0 0 vccd
+port 11 nsew
+flabel metal4 s 14746 9266 15000 9862 3 FreeSans 520 180 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 14746 34750 15000 39593 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal4 s 14746 10218 15000 10814 3 FreeSans 520 180 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 14746 13600 15000 18593 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 34750 254 39593 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 0 3550 254 4480 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 12410 254 13300 3 FreeSans 520 0 0 0 vddio_q
+port 8 nsew
+flabel metal4 s 0 13600 254 18593 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 1370 254 2300 3 FreeSans 520 0 0 0 vccd
+port 11 nsew
+flabel metal4 s 0 9140 254 9206 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 5970 254 6660 3 FreeSans 520 0 0 0 vswitch
+port 7 nsew
+flabel metal4 s 0 0 254 1090 3 FreeSans 520 0 0 0 vcchib
+port 9 nsew
+flabel metal4 s 0 9922 254 10158 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 11240 254 12130 3 FreeSans 520 0 0 0 vssio_q
+port 14 nsew
+flabel metal4 s 0 4760 254 5690 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 0 2580 193 3270 3 FreeSans 520 0 0 0 vdda
+port 6 nsew
+flabel metal4 s 0 10218 254 10814 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 10874 254 10940 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 6940 254 7630 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 7910 254 8840 3 FreeSans 520 0 0 0 vssd
+port 13 nsew
+flabel metal4 s 0 9266 254 9862 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+<< properties >>
+string LEFclass PAD GROUND
+string FIXED_BBOX 0 0 15000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_vssd_lvc_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_vssd_lvc_pad.mag
new file mode 100644
index 0000000..7781fa8
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_vssd_lvc_pad.mag
@@ -0,0 +1,230 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1584473789
+<< metal1 >>
+rect 6867 95 7067 195
+rect 5242 -7 5540 83
+<< metal2 >>
+rect 101 0 4099 287
+rect 6888 -7 8888 58
+rect 10953 -7 14940 715
+<< metal3 >>
+rect 101 0 4900 862
+rect 5200 -7 7374 918
+rect 7676 -7 9850 918
+rect 10151 -7 14940 862
+<< metal4 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 0 13600 254 18593
+rect 14746 13600 15000 18593
+rect 0 12410 254 13300
+rect 14746 12410 15000 13300
+rect 0 11240 254 12130
+rect 14746 11240 15000 12130
+rect 0 10874 254 10940
+rect 14746 10874 15000 10940
+rect 0 10218 100 10814
+rect 14746 10218 14846 10814
+rect 0 9922 254 10158
+rect 14746 9922 15000 10158
+rect 0 9266 116 9862
+rect 14746 9266 14862 9862
+rect 0 9140 254 9206
+rect 14746 9140 15000 9206
+rect 0 7910 254 8840
+rect 14746 7910 15000 8840
+rect 0 6940 254 7630
+rect 14746 6940 15000 7630
+rect 0 5970 254 6660
+rect 14746 5970 15000 6660
+rect 0 4760 254 5690
+rect 14746 4760 15000 5690
+rect 0 3550 254 4480
+rect 14746 3550 15000 4480
+rect 0 2580 254 3270
+rect 14746 2580 15000 3270
+rect 0 1370 254 2300
+rect 14746 1370 15000 2300
+rect 0 0 254 1090
+rect 14746 0 15000 1090
+<< metal5 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 6339 32546 10468 33417
+rect 0 13600 254 18590
+rect 14746 13600 15000 18590
+rect 0 12430 254 13280
+rect 14746 12430 15000 13280
+rect 0 11260 254 12110
+rect 14746 11260 15000 12110
+rect 0 9140 254 10940
+rect 14746 9140 15000 10940
+rect 0 7930 254 8820
+rect 14746 7930 15000 8820
+rect 0 6960 254 7610
+rect 14746 6960 15000 7610
+rect 0 5990 254 6640
+rect 14746 5990 15000 6640
+rect 0 4780 254 5670
+rect 14746 4780 15000 5670
+rect 0 3570 254 4460
+rect 14746 3570 15000 4460
+rect 0 2600 254 3250
+rect 14746 2600 15000 3250
+rect 0 1390 254 2280
+rect 14746 1390 15000 2280
+rect 0 20 254 1070
+rect 14746 20 15000 1070
+use s8iom0s8_overlay_vssd_lvc  s8iom0s8_overlay_vssd_lvc_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -7
+box 0 7 15000 39600
+use s8iom0s8_top_ground_lvc_wpad  s8iom0s8_top_ground_lvc_wpad_1 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -7
+box 0 0 15000 39600
+<< labels >>
+flabel metal4 s 14873 37925 14873 37925 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 127 37925 127 37925 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal5 s 6339 32546 10468 33417 0 FreeSans 2000 0 0 0 vssd
+port 17 nsew
+flabel metal2 s 100 -7 4099 287 0 FreeSans 2000 0 0 0 src_bdy_lvc1
+port 4 nsew
+flabel metal2 s 10953 -7 14940 715 0 FreeSans 2000 0 0 0 src_bdy_lvc2
+port 5 nsew
+flabel metal2 s 6888 -7 8888 58 0 FreeSans 400 0 0 0 bdy2_b2b
+port 6 nsew
+flabel metal3 s 7676 -7 9850 918 0 FreeSans 2000 0 0 0 drn_lvc2
+port 3 nsew
+flabel metal3 s 5200 -7 7374 918 0 FreeSans 2000 0 0 0 drn_lvc1
+port 2 nsew
+flabel metal3 s 10151 -7 14940 862 0 FreeSans 4000 0 0 0 vssd
+port 17 nsew
+flabel metal3 s 100 -7 4900 862 0 FreeSans 2000 0 0 0 vssd
+port 17 nsew
+flabel metal5 s 14746 9140 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal5 s 14807 2600 15000 3250 3 FreeSans 520 180 0 0 vdda
+port 10 nsew
+flabel metal5 s 14746 7930 15000 8820 3 FreeSans 520 180 0 0 vssd
+port 17 nsew
+flabel metal5 s 14746 11260 15000 12110 3 FreeSans 520 180 0 0 vssio_q
+port 18 nsew
+flabel metal5 s 14746 4780 15000 5670 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal5 s 14746 5990 15000 6640 3 FreeSans 520 180 0 0 vswitch
+port 11 nsew
+flabel metal5 s 14746 6961 15000 7610 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal5 s 14746 1390 15000 2280 3 FreeSans 520 180 0 0 vccd
+port 15 nsew
+flabel metal5 s 14746 12430 15000 13280 3 FreeSans 520 180 0 0 vddio_q
+port 12 nsew
+flabel metal5 s 14746 13600 15000 18590 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal5 s 14746 20 15000 1070 3 FreeSans 520 180 0 0 vcchib
+port 13 nsew
+flabel metal5 s 14746 3570 15000 4460 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 13600 254 18590 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 7930 254 8820 3 FreeSans 520 0 0 0 vssd
+port 17 nsew
+flabel metal5 s 0 11260 254 12110 3 FreeSans 520 0 0 0 vssio_q
+port 18 nsew
+flabel metal5 s 0 5990 254 6640 3 FreeSans 520 0 0 0 vswitch
+port 11 nsew
+flabel metal5 s 0 4780 254 5670 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal5 s 0 2600 193 3250 3 FreeSans 520 0 0 0 vdda
+port 10 nsew
+flabel metal5 s 0 3570 254 4460 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 1390 254 2280 3 FreeSans 520 0 0 0 vccd
+port 15 nsew
+flabel metal5 s 0 12430 254 13280 3 FreeSans 520 0 0 0 vddio_q
+port 12 nsew
+flabel metal5 s 0 9140 254 10940 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal5 s 0 6961 254 7610 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal5 s 0 20 254 1070 3 FreeSans 520 0 0 0 vcchib
+port 13 nsew
+flabel metal4 s 14746 7910 15000 8840 3 FreeSans 520 180 0 0 vssd
+port 17 nsew
+flabel metal4 s 14807 2580 15000 3270 3 FreeSans 520 180 0 0 vdda
+port 10 nsew
+flabel metal4 s 14746 11240 15000 12130 3 FreeSans 520 180 0 0 vssio_q
+port 18 nsew
+flabel metal4 s 14746 4760 15000 5690 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 14746 5970 15000 6660 3 FreeSans 520 180 0 0 vswitch
+port 11 nsew
+flabel metal4 s 14746 9922 15000 10158 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 10874 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 0 15000 1090 3 FreeSans 520 180 0 0 vcchib
+port 13 nsew
+flabel metal4 s 14746 3550 15000 4480 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal4 s 14746 9140 15000 9206 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 6940 15000 7630 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 12410 15000 13300 3 FreeSans 520 180 0 0 vddio_q
+port 12 nsew
+flabel metal4 s 14746 1370 15000 2300 3 FreeSans 520 180 0 0 vccd
+port 15 nsew
+flabel metal4 s 14746 9266 15000 9862 3 FreeSans 520 180 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 14746 34750 15000 39593 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 14746 10218 15000 10814 3 FreeSans 520 180 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 14746 13600 15000 18593 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 34750 254 39593 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal4 s 0 3550 254 4480 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 12410 254 13300 3 FreeSans 520 0 0 0 vddio_q
+port 12 nsew
+flabel metal4 s 0 13600 254 18593 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 1370 254 2300 3 FreeSans 520 0 0 0 vccd
+port 15 nsew
+flabel metal4 s 0 9140 254 9206 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 5970 254 6660 3 FreeSans 520 0 0 0 vswitch
+port 11 nsew
+flabel metal4 s 0 0 254 1090 3 FreeSans 520 0 0 0 vcchib
+port 13 nsew
+flabel metal4 s 0 9922 254 10158 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 11240 254 12130 3 FreeSans 520 0 0 0 vssio_q
+port 18 nsew
+flabel metal4 s 0 4760 254 5690 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal4 s 0 2580 193 3270 3 FreeSans 520 0 0 0 vdda
+port 10 nsew
+flabel metal4 s 0 10218 254 10814 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 10874 254 10940 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 6940 254 7630 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 7910 254 8840 3 FreeSans 520 0 0 0 vssd
+port 17 nsew
+flabel metal4 s 0 9266 254 9862 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+flabel metal1 s 6867 95 7067 195 0 FreeSans 300 0 0 0 vssi
+port 7 nsew
+<< properties >>
+string LEFclass PAD GROUND
+string FIXED_BBOX 0 0 15000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_vssio_hvc_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_vssio_hvc_pad.mag
new file mode 100644
index 0000000..db38a6c
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_vssio_hvc_pad.mag
@@ -0,0 +1,226 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1584473789
+<< metal2 >>
+rect 99 -407 4879 -259
+rect 5179 -407 5579 -181
+rect 10078 -407 14858 -259
+<< metal3 >>
+rect 99 -407 4879 -16
+rect 5179 -407 7379 -259
+rect 7578 -407 9778 -89
+rect 10078 -407 14858 -16
+<< metal4 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 0 13600 254 18593
+rect 14746 13600 15000 18593
+rect 0 12410 254 13300
+rect 14746 12410 15000 13300
+rect 0 11240 254 12130
+rect 14746 11240 15000 12130
+rect 0 10874 254 10940
+rect 14746 10874 15000 10940
+rect 0 10218 100 10814
+rect 14746 10218 14846 10814
+rect 0 9922 254 10158
+rect 14746 9922 15000 10158
+rect 0 9266 116 9862
+rect 14746 9266 14862 9862
+rect 0 9140 254 9206
+rect 14746 9140 15000 9206
+rect 0 7910 254 8840
+rect 14746 7910 15000 8840
+rect 0 6940 254 7630
+rect 14746 6940 15000 7630
+rect 0 5970 254 6660
+rect 14746 5970 15000 6660
+rect 0 4760 254 5690
+rect 14746 4760 15000 5690
+rect 0 3550 254 4480
+rect 14746 3550 15000 4480
+rect 0 2580 254 3270
+rect 14746 2580 15000 3270
+rect 0 1370 254 2300
+rect 14746 1370 15000 2300
+rect 0 6 254 1090
+rect 14746 6 15000 1090
+rect 14934 5 15000 6
+rect 0 0 254 5
+rect 14746 0 15000 5
+<< metal5 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 7329 27458 7594 28780
+rect 0 13600 254 18590
+rect 14746 13600 15000 18590
+rect 0 12430 254 13280
+rect 14746 12430 15000 13280
+rect 0 11260 254 12110
+rect 14746 11260 15000 12110
+rect 0 9140 254 10940
+rect 14746 9140 15000 10940
+rect 0 7930 254 8820
+rect 14746 7930 15000 8820
+rect 0 6960 254 7610
+rect 14746 6960 15000 7610
+rect 0 5990 254 6640
+rect 14746 5990 15000 6640
+rect 0 4780 254 5670
+rect 14746 4780 15000 5670
+rect 0 3570 254 4460
+rect 14746 3570 15000 4460
+rect 0 2600 254 3250
+rect 14746 2600 15000 3250
+rect 0 1390 254 2280
+rect 14746 1390 15000 2280
+rect 0 20 254 1070
+rect 14746 20 15000 1070
+use s8iom0s8_overlay_vssio_hvc  s8iom0s8_overlay_vssio_hvc_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -407
+box 0 407 15000 40000
+use s8iom0s8_top_ground_hvc_wpad  s8iom0s8_top_ground_hvc_wpad_2 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -407
+box 0 0 15000 40000
+<< labels >>
+flabel metal5 s 7329 27458 7594 28780 0 FreeSans 2000 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 127 37914 127 37914 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 14873 37914 14873 37914 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal2 s 10078 -407 14858 -259 2 FreeSans 2000 90 0 0 drn_hvc
+port 2 nsew
+flabel metal2 s 99 -407 4879 -259 2 FreeSans 2000 90 0 0 src_bdy_hvc
+port 4 nsew
+flabel metal3 s 7578 -407 9778 -89 0 FreeSans 2000 0 0 0 drn_hvc
+port 2 nsew
+flabel metal3 s 99 -407 4879 -16 0 FreeSans 2000 0 0 0 vssio
+port 12 nsew
+flabel metal3 s 10078 -407 14858 -16 0 FreeSans 2000 0 0 0 vssio
+port 12 nsew
+flabel metal3 s 5179 -407 7379 -259 2 FreeSans 2000 90 0 0 src_bdy_hvc
+port 4 nsew
+flabel metal5 s 14746 9140 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal5 s 14807 2600 15000 3250 3 FreeSans 520 180 0 0 vdda
+port 6 nsew
+flabel metal5 s 14746 7930 15000 8820 3 FreeSans 520 180 0 0 vssd
+port 13 nsew
+flabel metal5 s 14746 11260 15000 12110 3 FreeSans 520 180 0 0 vssio_q
+port 14 nsew
+flabel metal5 s 14746 4780 15000 5670 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal5 s 14746 5990 15000 6640 3 FreeSans 520 180 0 0 vswitch
+port 7 nsew
+flabel metal5 s 14746 6961 15000 7610 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal5 s 14746 1390 15000 2280 3 FreeSans 520 180 0 0 vccd
+port 11 nsew
+flabel metal5 s 14746 12430 15000 13280 3 FreeSans 520 180 0 0 vddio_q
+port 8 nsew
+flabel metal5 s 14746 13600 15000 18590 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal5 s 14746 20 15000 1070 3 FreeSans 520 180 0 0 vcchib
+port 9 nsew
+flabel metal5 s 14746 3570 15000 4460 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 13600 254 18590 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 7930 254 8820 3 FreeSans 520 0 0 0 vssd
+port 13 nsew
+flabel metal5 s 0 11260 254 12110 3 FreeSans 520 0 0 0 vssio_q
+port 14 nsew
+flabel metal5 s 0 5990 254 6640 3 FreeSans 520 0 0 0 vswitch
+port 7 nsew
+flabel metal5 s 0 4780 254 5670 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal5 s 0 2600 193 3250 3 FreeSans 520 0 0 0 vdda
+port 6 nsew
+flabel metal5 s 0 3570 254 4460 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal5 s 0 1390 254 2280 3 FreeSans 520 0 0 0 vccd
+port 11 nsew
+flabel metal5 s 0 12430 254 13280 3 FreeSans 520 0 0 0 vddio_q
+port 8 nsew
+flabel metal5 s 0 9140 254 10940 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal5 s 0 6961 254 7610 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal5 s 0 20 254 1070 3 FreeSans 520 0 0 0 vcchib
+port 9 nsew
+flabel metal4 s 14746 7910 15000 8840 3 FreeSans 520 180 0 0 vssd
+port 13 nsew
+flabel metal4 s 14807 2580 15000 3270 3 FreeSans 520 180 0 0 vdda
+port 6 nsew
+flabel metal4 s 14746 11240 15000 12130 3 FreeSans 520 180 0 0 vssio_q
+port 14 nsew
+flabel metal4 s 14746 4760 15000 5690 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal4 s 14746 5970 15000 6660 3 FreeSans 520 180 0 0 vswitch
+port 7 nsew
+flabel metal4 s 14746 9922 15000 10158 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 10874 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 0 15000 1090 3 FreeSans 520 180 0 0 vcchib
+port 9 nsew
+flabel metal4 s 14746 3550 15000 4480 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal4 s 14746 9140 15000 9206 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 6940 15000 7630 3 FreeSans 520 180 0 0 vssa
+port 5 nsew
+flabel metal4 s 14746 12410 15000 13300 3 FreeSans 520 180 0 0 vddio_q
+port 8 nsew
+flabel metal4 s 14746 1370 15000 2300 3 FreeSans 520 180 0 0 vccd
+port 11 nsew
+flabel metal4 s 14746 9266 15000 9862 3 FreeSans 520 180 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 14746 34750 15000 39593 3 FreeSans 520 180 0 0 vssio
+port 12 nsew
+flabel metal4 s 14746 10218 15000 10814 3 FreeSans 520 180 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 14746 13600 15000 18593 3 FreeSans 520 180 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 34750 254 39593 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 0 3550 254 4480 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 12410 254 13300 3 FreeSans 520 0 0 0 vddio_q
+port 8 nsew
+flabel metal4 s 0 13600 254 18593 3 FreeSans 520 0 0 0 vddio
+port 10 nsew
+flabel metal4 s 0 1370 254 2300 3 FreeSans 520 0 0 0 vccd
+port 11 nsew
+flabel metal4 s 0 9140 254 9206 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 5970 254 6660 3 FreeSans 520 0 0 0 vswitch
+port 7 nsew
+flabel metal4 s 0 0 254 1090 3 FreeSans 520 0 0 0 vcchib
+port 9 nsew
+flabel metal4 s 0 9922 254 10158 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 11240 254 12130 3 FreeSans 520 0 0 0 vssio_q
+port 14 nsew
+flabel metal4 s 0 4760 254 5690 3 FreeSans 520 0 0 0 vssio
+port 12 nsew
+flabel metal4 s 0 2580 193 3270 3 FreeSans 520 0 0 0 vdda
+port 6 nsew
+flabel metal4 s 0 10218 254 10814 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 10874 254 10940 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 6940 254 7630 3 FreeSans 520 0 0 0 vssa
+port 5 nsew
+flabel metal4 s 0 7910 254 8840 3 FreeSans 520 0 0 0 vssd
+port 13 nsew
+flabel metal4 s 0 9266 254 9862 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+<< properties >>
+string LEFclass PAD GROUND
+string FIXED_BBOX 0 0 15000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0_vssio_lvc_pad.mag b/sky130/custom/sky130_fd_io/mag/s8iom0_vssio_lvc_pad.mag
new file mode 100644
index 0000000..b467e36
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0_vssio_lvc_pad.mag
@@ -0,0 +1,227 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1584473789
+<< metal1 >>
+rect 6867 95 7067 195
+rect 5242 -7 5540 74
+<< metal2 >>
+rect 100 0 4099 287
+rect 6888 -7 8888 58
+rect 10953 -7 14940 715
+<< metal3 >>
+rect 98 339 4900 862
+rect 100 0 4900 339
+rect 5200 -7 7374 918
+rect 7676 -7 9850 918
+rect 10151 -7 14940 862
+<< metal4 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 0 13600 254 18593
+rect 14746 13600 15000 18593
+rect 0 12410 254 13300
+rect 14746 12410 15000 13300
+rect 0 11240 254 12130
+rect 14746 11240 15000 12130
+rect 0 10874 254 10940
+rect 14746 10874 15000 10940
+rect 0 10218 100 10814
+rect 14746 10218 14846 10814
+rect 0 9922 254 10158
+rect 14746 9922 15000 10158
+rect 0 9266 116 9862
+rect 14746 9266 14862 9862
+rect 0 9140 254 9206
+rect 14746 9140 15000 9206
+rect 0 7910 254 8840
+rect 14746 7910 15000 8840
+rect 0 6940 254 7630
+rect 14746 6940 15000 7630
+rect 0 5970 254 6660
+rect 14746 5970 15000 6660
+rect 0 4760 254 5690
+rect 14746 4760 15000 5690
+rect 0 3550 254 4480
+rect 14746 3550 15000 4480
+rect 0 2580 254 3270
+rect 14746 2580 15000 3270
+rect 0 1370 254 2300
+rect 14746 1370 15000 2300
+rect 0 0 254 1090
+rect 14746 0 15000 1090
+<< metal5 >>
+rect 0 34750 254 39593
+rect 14746 34750 15000 39593
+rect 6339 32546 10468 33417
+rect 0 13600 254 18590
+rect 14746 13600 15000 18590
+rect 0 12430 254 13280
+rect 14746 12430 15000 13280
+rect 0 11260 254 12110
+rect 14746 11260 15000 12110
+rect 0 9140 254 10940
+rect 14746 9140 15000 10940
+rect 0 7930 254 8820
+rect 14746 7930 15000 8820
+rect 0 6960 254 7610
+rect 14746 6960 15000 7610
+rect 0 5990 254 6640
+rect 14746 5990 15000 6640
+rect 0 4780 254 5670
+rect 14746 4780 15000 5670
+rect 0 3570 254 4460
+rect 14746 3570 15000 4460
+rect 0 2600 254 3250
+rect 14746 2600 15000 3250
+rect 0 1390 254 2280
+rect 14746 1390 15000 2280
+rect 0 20 254 1070
+rect 14746 20 15000 1070
+use s8iom0s8_overlay_vssio_lvc  s8iom0s8_overlay_vssio_lvc_0 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -7
+box 0 7 15000 39600
+use s8iom0s8_top_ground_lvc_wpad  s8iom0s8_top_ground_lvc_wpad_2 ~/projects/efabless/tech/SW/EFS8A/libs.ref/s8iom0s8/mag
+timestamp 1584046481
+transform 1 0 0 0 1 -7
+box 0 0 15000 39600
+<< labels >>
+flabel metal5 s 6339 32546 10468 33417 0 FreeSans 2000 0 0 0 vssio
+port 16 nsew
+flabel metal2 s 100 -7 4099 287 0 FreeSans 2000 0 0 0 src_bdy_lvc1
+port 4 nsew
+flabel metal2 s 10953 -7 14940 715 0 FreeSans 2000 0 0 0 src_bdy_lvc2
+port 5 nsew
+flabel metal2 s 6888 -7 8888 58 0 FreeSans 400 0 0 0 bdy2_b2b
+port 6 nsew
+flabel metal3 s 7676 -7 9850 918 0 FreeSans 2000 0 0 0 drn_lvc2
+port 3 nsew
+flabel metal3 s 5200 -7 7374 918 0 FreeSans 2000 0 0 0 drn_lvc1
+port 2 nsew
+flabel metal3 s 10151 -7 14940 862 0 FreeSans 4000 0 0 0 vssio
+port 16 nsew
+flabel metal3 s 100 -7 4900 862 0 FreeSans 2000 0 0 0 vssio
+port 16 nsew
+flabel metal1 s 6867 95 7067 195 0 FreeSans 300 0 0 0 vssi
+port 7 nsew
+flabel metal5 s 14746 9140 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal5 s 14807 2600 15000 3250 3 FreeSans 520 180 0 0 vdda
+port 10 nsew
+flabel metal5 s 14746 7930 15000 8820 3 FreeSans 520 180 0 0 vssd
+port 17 nsew
+flabel metal5 s 14746 11260 15000 12110 3 FreeSans 520 180 0 0 vssio_q
+port 18 nsew
+flabel metal5 s 14746 4780 15000 5670 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal5 s 14746 5990 15000 6640 3 FreeSans 520 180 0 0 vswitch
+port 11 nsew
+flabel metal5 s 14746 6961 15000 7610 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal5 s 14746 1390 15000 2280 3 FreeSans 520 180 0 0 vccd
+port 15 nsew
+flabel metal5 s 14746 12430 15000 13280 3 FreeSans 520 180 0 0 vddio_q
+port 12 nsew
+flabel metal5 s 14746 13600 15000 18590 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal5 s 14746 20 15000 1070 3 FreeSans 520 180 0 0 vcchib
+port 13 nsew
+flabel metal5 s 14746 3570 15000 4460 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 13600 254 18590 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 7930 254 8820 3 FreeSans 520 0 0 0 vssd
+port 17 nsew
+flabel metal5 s 0 11260 254 12110 3 FreeSans 520 0 0 0 vssio_q
+port 18 nsew
+flabel metal5 s 0 5990 254 6640 3 FreeSans 520 0 0 0 vswitch
+port 11 nsew
+flabel metal5 s 0 4780 254 5670 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal5 s 0 2600 193 3250 3 FreeSans 520 0 0 0 vdda
+port 10 nsew
+flabel metal5 s 0 3570 254 4460 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal5 s 0 1390 254 2280 3 FreeSans 520 0 0 0 vccd
+port 15 nsew
+flabel metal5 s 0 12430 254 13280 3 FreeSans 520 0 0 0 vddio_q
+port 12 nsew
+flabel metal5 s 0 9140 254 10940 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal5 s 0 6961 254 7610 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal5 s 0 20 254 1070 3 FreeSans 520 0 0 0 vcchib
+port 13 nsew
+flabel metal4 s 14746 7910 15000 8840 3 FreeSans 520 180 0 0 vssd
+port 17 nsew
+flabel metal4 s 14807 2580 15000 3270 3 FreeSans 520 180 0 0 vdda
+port 10 nsew
+flabel metal4 s 14746 11240 15000 12130 3 FreeSans 520 180 0 0 vssio_q
+port 18 nsew
+flabel metal4 s 14746 4760 15000 5690 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 14746 5970 15000 6660 3 FreeSans 520 180 0 0 vswitch
+port 11 nsew
+flabel metal4 s 14746 9922 15000 10158 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 10874 15000 10940 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 0 15000 1090 3 FreeSans 520 180 0 0 vcchib
+port 13 nsew
+flabel metal4 s 14746 3550 15000 4480 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal4 s 14746 9140 15000 9206 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 6940 15000 7630 3 FreeSans 520 180 0 0 vssa
+port 9 nsew
+flabel metal4 s 14746 12410 15000 13300 3 FreeSans 520 180 0 0 vddio_q
+port 12 nsew
+flabel metal4 s 14746 1370 15000 2300 3 FreeSans 520 180 0 0 vccd
+port 15 nsew
+flabel metal4 s 14746 9266 15000 9862 3 FreeSans 520 180 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 14746 34750 15000 39593 3 FreeSans 520 180 0 0 vssio
+port 16 nsew
+flabel metal4 s 14746 10218 15000 10814 3 FreeSans 520 180 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 14746 13600 15000 18593 3 FreeSans 520 180 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 34750 254 39593 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal4 s 0 3550 254 4480 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 12410 254 13300 3 FreeSans 520 0 0 0 vddio_q
+port 12 nsew
+flabel metal4 s 0 13600 254 18593 3 FreeSans 520 0 0 0 vddio
+port 14 nsew
+flabel metal4 s 0 1370 254 2300 3 FreeSans 520 0 0 0 vccd
+port 15 nsew
+flabel metal4 s 0 9140 254 9206 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 5970 254 6660 3 FreeSans 520 0 0 0 vswitch
+port 11 nsew
+flabel metal4 s 0 0 254 1090 3 FreeSans 520 0 0 0 vcchib
+port 13 nsew
+flabel metal4 s 0 9922 254 10158 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 11240 254 12130 3 FreeSans 520 0 0 0 vssio_q
+port 18 nsew
+flabel metal4 s 0 4760 254 5690 3 FreeSans 520 0 0 0 vssio
+port 16 nsew
+flabel metal4 s 0 2580 193 3270 3 FreeSans 520 0 0 0 vdda
+port 10 nsew
+flabel metal4 s 0 10218 254 10814 3 FreeSans 520 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 10874 254 10940 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 6940 254 7630 3 FreeSans 520 0 0 0 vssa
+port 9 nsew
+flabel metal4 s 0 7910 254 8840 3 FreeSans 520 0 0 0 vssd
+port 17 nsew
+flabel metal4 s 0 9266 254 9862 3 FreeSans 520 0 0 0 amuxbus_b
+port 1 nsew
+<< properties >>
+string LEFclass PAD GROUND
+string FIXED_BBOX 0 0 15000 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/mag/s8iom0s8_com_bus_slice_1um.mag b/sky130/custom/sky130_fd_io/mag/s8iom0s8_com_bus_slice_1um.mag
new file mode 100644
index 0000000..2349822
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/mag/s8iom0s8_com_bus_slice_1um.mag
@@ -0,0 +1,99 @@
+magic
+tech EFS8A
+magscale 1 2
+timestamp 1586352185
+<< metal4 >>
+rect 0 34750 200 39593
+rect 0 13600 200 18593
+rect 0 12410 200 13300
+rect 0 11240 200 12130
+rect 0 10874 200 10940
+rect 0 10218 200 10814
+rect 0 9922 200 10158
+rect 0 9266 200 9862
+rect 0 9140 200 9206
+rect 0 7910 200 8840
+rect 0 6940 200 7630
+rect 0 5970 200 6660
+rect 0 4760 200 5690
+rect 0 3550 200 4480
+rect 0 2580 200 3270
+rect 0 1370 200 2300
+rect 0 0 200 1090
+<< metal5 >>
+rect 0 34750 200 39593
+rect 0 13600 200 18590
+rect 0 12430 200 13280
+rect 0 11260 200 12110
+rect 0 9140 200 10940
+rect 0 7930 200 8820
+rect 0 6960 200 7610
+rect 0 5990 200 6640
+rect 0 4780 200 5670
+rect 0 3570 200 4460
+rect 0 2600 200 3250
+rect 0 1390 200 2280
+rect 0 20 200 1070
+<< labels >>
+flabel metal4 s 0 13600 200 18593 0 FreeSans 640 0 0 0 vddio
+port 7 nsew
+flabel metal5 s 0 12430 200 13280 0 FreeSans 640 0 0 0 vddio_q
+port 5 nsew
+flabel metal4 s 0 12410 200 13300 0 FreeSans 640 0 0 0 vddio_q
+port 5 nsew
+flabel metal5 s 0 11260 200 12110 0 FreeSans 640 0 0 0 vssio_q
+port 11 nsew
+flabel metal4 s 0 11240 200 12130 0 FreeSans 640 0 0 0 vssio_q
+port 11 nsew
+flabel metal5 s 0 9140 200 10940 0 FreeSans 640 0 0 0 vssa
+port 2 nsew
+flabel metal4 s 0 10874 200 10940 0 FreeSans 640 0 0 0 vssa
+port 2 nsew
+flabel metal4 s 0 10218 200 10814 0 FreeSans 640 0 0 0 amuxbus_a
+port 0 nsew
+flabel metal4 s 0 9266 200 9862 0 FreeSans 640 0 0 0 amuxbus_b
+port 1 nsew
+flabel metal4 s 0 9140 200 9206 0 FreeSans 640 0 0 0 vssa
+port 2 nsew
+flabel metal5 s 0 7930 200 8820 0 FreeSans 640 0 0 0 vssd
+port 10 nsew
+flabel metal4 s 0 7910 200 8840 0 FreeSans 640 0 0 0 vssd
+port 10 nsew
+flabel metal5 s 0 6960 200 7610 0 FreeSans 640 0 0 0 vssa
+port 2 nsew
+flabel metal4 s 0 6940 200 7630 0 FreeSans 640 0 0 0 vssa
+port 2 nsew
+flabel metal5 s 0 5990 200 6640 0 FreeSans 640 0 0 0 vswitch
+port 4 nsew
+flabel metal4 s 0 5970 200 6660 0 FreeSans 640 0 0 0 vswitch
+port 4 nsew
+flabel metal5 s 0 4780 200 5670 0 FreeSans 640 0 0 0 vssio
+port 9 nsew
+flabel metal4 s 0 4760 200 5690 0 FreeSans 640 0 0 0 vssio
+port 9 nsew
+flabel metal5 s 0 3570 200 4460 0 FreeSans 640 0 0 0 vddio
+port 7 nsew
+flabel metal4 s 0 3550 200 4480 0 FreeSans 640 0 0 0 vddio
+port 7 nsew
+flabel metal5 s 0 2600 200 3250 0 FreeSans 640 0 0 0 vdda
+port 3 nsew
+flabel metal4 s 0 2580 200 3270 0 FreeSans 640 0 0 0 vdda
+port 3 nsew
+flabel metal5 s 0 1390 200 2280 0 FreeSans 640 0 0 0 vccd
+port 8 nsew
+flabel metal4 s 0 1370 200 2300 0 FreeSans 640 0 0 0 vccd
+port 8 nsew
+flabel metal5 s 0 20 200 1070 0 FreeSans 640 0 0 0 vcchib
+port 6 nsew
+flabel metal4 s 0 0 200 1090 0 FreeSans 640 0 0 0 vcchib
+port 6 nsew
+flabel metal5 s 0 34750 200 39593 0 FreeSans 640 0 0 0 vssio
+port 9 nsew
+flabel metal5 s 0 13600 200 18590 0 FreeSans 640 0 0 0 vddio
+port 7 nsew
+flabel metal4 s 0 9922 200 10158 0 FreeSans 640 0 0 0 vssa
+port 2 nsew
+<< properties >>
+string LEFclass PAD SPACER
+string FIXED_BBOX 0 0 200 39593
+<< end >>
diff --git a/sky130/custom/sky130_fd_io/verilog/power_pads_lib.v b/sky130/custom/sky130_fd_io/verilog/power_pads_lib.v
new file mode 100644
index 0000000..f12b529
--- /dev/null
+++ b/sky130/custom/sky130_fd_io/verilog/power_pads_lib.v
@@ -0,0 +1,714 @@
+//-----------------------------------------------------------------------
+// Verilog entries for standard power pads (s8 power pads + overlays)
+// Also includes stub entries for the corner and fill cells
+// Also includes the custom gpiov2 cell (adds m5 on buses), which is a wrapper
+// for the s8 gpiov2 cell.
+//
+// This file is distributed as open source under the Apache 2.0 license
+// Copyright 2019 efabless, Inc.
+// Written by Tim Edwards 
+//-----------------------------------------------------------------------
+
+module s8iom0_vccd_hvc_pad (amuxbus_a, amuxbus_b, drn_hvc,
+	src_bdy_hvc, vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout drn_hvc;
+  inout src_bdy_hvc;
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+  // Instantiate the underlying power pad (connects p_pad to vccd)
+  s8iom0s8_top_power_hvc_wpad s8iom0s8_top_power_hvc_base ( 
+	.vssa(vssa),
+	.vdda(vdda),
+	.vswitch(vswitch),
+	.vddio_q(vddio_q),
+	.vcchib(vcchib),
+	.vddio(vddio),
+	.vccd(vccd),
+	.vssio(vssio),
+	.vssd(vssd),
+	.vssio_q(vssio_q),
+	.p_pad(vccd),
+	.ogc_hvc(),
+	.amuxbus_a(amuxbus_a),
+	.amuxbus_b(amuxbus_b),
+	.drn_hvc(drn_hvc),
+	.src_bdy_hvc(src_bdy_hvc)
+  );
+
+endmodule
+
+module s8iom0_vccd_lvc_pad (amuxbus_a, amuxbus_b,
+	drn_lvc1, drn_lvc2, src_bdy_lvc1, src_bdy_lvc2, bdy2_b2b,
+	vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout drn_lvc1;
+  inout drn_lvc2;
+  inout src_bdy_lvc1;
+  inout src_bdy_lvc2;
+  inout bdy2_b2b;
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+  // Instantiate the underlying power pad (connects p_pad to vccd)
+  s8iom0s8_top_power_lvc_wpad s8iom0s8_top_power_lvc_base ( 
+	.vssa(vssa),
+	.vdda(vdda),
+	.vswitch(vswitch),
+	.vddio_q(vddio_q),
+	.vcchib(vcchib),
+	.vddio(vddio),
+	.vccd(vccd),
+	.vssio(vssio),
+	.vssd(vssd),
+	.vssio_q(vssio_q),
+	.p_pad(vccd),
+	.ogc_lvc(),
+	.bdy2_b2b(bdy2_b2b),
+	.amuxbus_a(amuxbus_a),
+	.amuxbus_b(amuxbus_b),
+	.drn_lvc1(drn_lvc1),
+	.drn_lvc2(drn_lvc2),
+	.src_bdy_lvc1(src_bdy_lvc1),
+	.src_bdy_lvc2(src_bdy_lvc2)
+  );
+
+endmodule
+
+module s8iom0_vdda_lvc_pad (amuxbus_a, amuxbus_b,
+	drn_lvc1, drn_lvc2, src_bdy_lvc1, src_bdy_lvc2, bdy2_b2b,
+	vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout drn_lvc1;
+  inout drn_lvc2;
+  inout src_bdy_lvc1;
+  inout src_bdy_lvc2;
+  inout bdy2_b2b;
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+  // Instantiate the underlying power pad (connects p_pad to vdda)
+  s8iom0s8_top_power_lvc_wpad s8iom0s8_top_power_lvc_base ( 
+	.vssa(vssa),
+	.vdda(vdda),
+	.vswitch(vswitch),
+	.vddio_q(vddio_q),
+	.vcchib(vcchib),
+	.vddio(vddio),
+	.vccd(vccd),
+	.vssio(vssio),
+	.vssd(vssd),
+	.vssio_q(vssio_q),
+	.p_pad(vdda),
+	.ogc_lvc(),
+	.bdy2_b2b(bdy2_b2b),
+	.amuxbus_a(amuxbus_a),
+	.amuxbus_b(amuxbus_b),
+	.drn_lvc1(drn_lvc1),
+	.drn_lvc2(drn_lvc2),
+	.src_bdy_lvc1(src_bdy_lvc1),
+	.src_bdy_lvc2(src_bdy_lvc2)
+  );
+
+endmodule
+
+module s8iom0_vdda_hvc_pad (amuxbus_a, amuxbus_b, drn_hvc,
+	src_bdy_hvc,vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout drn_hvc;
+  inout src_bdy_hvc;
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+  // Instantiate the underlying power pad (connects p_pad to vdda)
+  s8iom0s8_top_power_hvc_wpad s8iom0s8_top_power_hvc_base ( 
+	.vssa(vssa),
+	.vdda(vdda),
+	.vswitch(vswitch),
+	.vddio_q(vddio_q),
+	.vcchib(vcchib),
+	.vddio(vddio),
+	.vccd(vccd),
+	.vssio(vssio),
+	.vssd(vssd),
+	.vssio_q(vssio_q),
+	.p_pad(vdda),
+	.ogc_hvc(),
+	.amuxbus_a(amuxbus_a),
+	.amuxbus_b(amuxbus_b),
+	.drn_hvc(drn_hvc),
+	.src_bdy_hvc(src_bdy_hvc)
+  );
+
+endmodule
+
+module s8iom0_vddio_lvc_pad (amuxbus_a, amuxbus_b,
+	drn_lvc1, drn_lvc2, src_bdy_lvc1, src_bdy_lvc2, bdy2_b2b,
+	vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout drn_lvc1;
+  inout drn_lvc2;
+  inout src_bdy_lvc1;
+  inout src_bdy_lvc2;
+  inout bdy2_b2b;
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+  // Instantiate the underlying power pad (connects p_pad and vddio_q to vddio)
+  s8iom0s8_top_power_lvc_wpad s8iom0s8_top_power_lvc_base ( 
+	.vssa(vssa),
+	.vdda(vdda),
+	.vswitch(vswitch),
+	.vddio_q(vddio_q),
+	.vcchib(vcchib),
+	.vddio(vddio),
+	.vccd(vccd),
+	.vssio(vssio),
+	.vssd(vssd),
+	.vssio_q(vssio_q),
+	.p_pad(vddio),
+	.ogc_lvc(),
+	.bdy2_b2b(bdy2_b2b),
+	.amuxbus_a(amuxbus_a),
+	.amuxbus_b(amuxbus_b),
+	.drn_lvc1(drn_lvc1),
+	.drn_lvc2(drn_lvc2),
+	.src_bdy_lvc1(src_bdy_lvc1),
+	.src_bdy_lvc2(src_bdy_lvc2)
+  );
+
+  assign vddio_q = vddio;
+
+endmodule
+
+module s8iom0_vddio_hvc_pad (amuxbus_a, amuxbus_b, drn_hvc,
+	src_bdy_hvc,vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout drn_hvc;
+  inout src_bdy_hvc;
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+  // Instantiate the underlying power pad (connects p_pad and vddio_q to vddio)
+  s8iom0s8_top_power_hvc_wpad s8iom0s8_top_power_hvc_base ( 
+	.vssa(vssa),
+	.vdda(vdda),
+	.vswitch(vswitch),
+	.vddio_q(vddio_q),
+	.vcchib(vcchib),
+	.vddio(vddio),
+	.vccd(vccd),
+	.vssio(vssio),
+	.vssd(vssd),
+	.vssio_q(vssio_q),
+	.p_pad(vddio),
+	.ogc_hvc(),
+	.amuxbus_a(amuxbus_a),
+	.amuxbus_b(amuxbus_b),
+	.drn_hvc(drn_hvc),
+	.src_bdy_hvc(src_bdy_hvc)
+  );
+
+  assign vddio_q = vddio;
+
+endmodule
+
+module s8iom0_vssd_lvc_pad (amuxbus_a, amuxbus_b,
+	drn_lvc1, drn_lvc2, src_bdy_lvc1, src_bdy_lvc2, bdy2_b2b,
+	vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout drn_lvc1;
+  inout drn_lvc2;
+  inout src_bdy_lvc1;
+  inout src_bdy_lvc2;
+  inout bdy2_b2b;
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+  // Instantiate the underlying ground pad (connects g_pad to vssd)
+  s8iom0s8_top_ground_lvc_wpad s8iom0s8_top_ground_lvc_base ( 
+	.vssa(vssa),
+	.vdda(vdda),
+	.vswitch(vswitch),
+	.vddio_q(vddio_q),
+	.vcchib(vcchib),
+	.vddio(vddio),
+	.vccd(vccd),
+	.vssio(vssio),
+	.vssd(vssd),
+	.vssio_q(vssio_q),
+	.g_pad(vssd),
+	.ogc_lvc(),
+	.bdy2_b2b(bdy2_b2b),
+	.amuxbus_a(amuxbus_a),
+	.amuxbus_b(amuxbus_b),
+	.drn_lvc1(drn_lvc1),
+	.drn_lvc2(drn_lvc2),
+	.src_bdy_lvc1(src_bdy_lvc1),
+	.src_bdy_lvc2(src_bdy_lvc2)
+  );
+
+endmodule
+
+module s8iom0_vssd_hvc_pad (amuxbus_a, amuxbus_b, drn_hvc,
+	src_bdy_hvc, vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout drn_hvc;
+  inout src_bdy_hvc;
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+  // Instantiate the underlying ground pad (connects g_pad to vssd)
+  s8iom0s8_top_ground_hvc_wpad s8iom0s8_top_ground_hvc_base ( 
+	.vssa(vssa),
+	.vdda(vdda),
+	.vswitch(vswitch),
+	.vddio_q(vddio_q),
+	.vcchib(vcchib),
+	.vddio(vddio),
+	.vccd(vccd),
+	.vssio(vssio),
+	.vssd(vssd),
+	.vssio_q(vssio_q),
+	.g_pad(vssd),
+	.ogc_hvc(),
+	.amuxbus_a(amuxbus_a),
+	.amuxbus_b(amuxbus_b),
+	.drn_hvc(drn_hvc),
+	.src_bdy_hvc(src_bdy_hvc)
+  );
+
+endmodule
+
+module s8iom0_vssio_lvc_pad (amuxbus_a, amuxbus_b,
+	drn_lvc1, drn_lvc2, src_bdy_lvc1, src_bdy_lvc2, bdy2_b2b,
+	vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout drn_lvc1;
+  inout drn_lvc2;
+  inout src_bdy_lvc1;
+  inout src_bdy_lvc2;
+  inout bdy2_b2b;
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+  // Instantiate the underlying ground pad (connects g_pad and vssio_q to vssio)
+  s8iom0s8_top_ground_lvc_wpad s8iom0s8_top_ground_lvc_base ( 
+	.vssa(vssa),
+	.vdda(vdda),
+	.vswitch(vswitch),
+	.vddio_q(vddio_q),
+	.vcchib(vcchib),
+	.vddio(vddio),
+	.vccd(vccd),
+	.vssio(vssio),
+	.vssd(vssd),
+	.vssio_q(vssio_q),
+	.g_pad(vssio),
+	.ogc_lvc(),
+	.bdy2_b2b(bdy2_b2b),
+	.amuxbus_a(amuxbus_a),
+	.amuxbus_b(amuxbus_b),
+	.drn_lvc1(drn_lvc1),
+	.drn_lvc2(drn_lvc2),
+	.src_bdy_lvc1(src_bdy_lvc1),
+	.src_bdy_lvc2(src_bdy_lvc2)
+  );
+
+  assign vssio_q = vssio;
+
+endmodule
+
+
+module s8iom0_vssio_hvc_pad (amuxbus_a, amuxbus_b, drn_hvc,
+	src_bdy_hvc,vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout drn_hvc;
+  inout src_bdy_hvc;
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+  // Instantiate the underlying ground pad (connects g_pad and vssio_q to vssio)
+  s8iom0s8_top_ground_hvc_wpad s8iom0s8_top_ground_hvc_base ( 
+	.vssa(vssa),
+	.vdda(vdda),
+	.vswitch(vswitch),
+	.vddio_q(vddio_q),
+	.vcchib(vcchib),
+	.vddio(vddio),
+	.vccd(vccd),
+	.vssio(vssio),
+	.vssd(vssd),
+	.vssio_q(vssio_q),
+	.g_pad(vssio),
+	.ogc_hvc(),
+	.amuxbus_a(amuxbus_a),
+	.amuxbus_b(amuxbus_b),
+	.drn_hvc(drn_hvc),
+	.src_bdy_hvc(src_bdy_hvc)
+  );
+
+  assign vssio_q = vssio;
+
+endmodule
+
+module s8iom0_vssa_lvc_pad (amuxbus_a, amuxbus_b,
+	drn_lvc1, drn_lvc2, src_bdy_lvc1, src_bdy_lvc2, bdy2_b2b,
+	vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout drn_lvc1;
+  inout drn_lvc2;
+  inout src_bdy_lvc1;
+  inout src_bdy_lvc2;
+  inout bdy2_b2b;
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+  // Instantiate the underlying ground pad (connects g_pad to vssa)
+  s8iom0s8_top_ground_lvc_wpad s8iom0s8_top_ground_lvc_base ( 
+	.vssa(vssa),
+	.vdda(vdda),
+	.vswitch(vswitch),
+	.vddio_q(vddio_q),
+	.vcchib(vcchib),
+	.vddio(vddio),
+	.vccd(vccd),
+	.vssio(vssio),
+	.vssd(vssd),
+	.vssio_q(vssio_q),
+	.g_pad(vssa),
+	.ogc_lvc(),
+	.bdy2_b2b(bdy2_b2b),
+	.amuxbus_a(amuxbus_a),
+	.amuxbus_b(amuxbus_b),
+	.drn_lvc1(drn_lvc1),
+	.drn_lvc2(drn_lvc2),
+	.src_bdy_lvc1(src_bdy_lvc1),
+	.src_bdy_lvc2(src_bdy_lvc2)
+  );
+
+endmodule
+
+module s8iom0_vssa_hvc_pad (amuxbus_a, amuxbus_b, drn_hvc,
+	src_bdy_hvc,vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout drn_hvc;
+  inout src_bdy_hvc;
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+  // Instantiate the underlying ground pad (connects g_pad to vssa)
+  s8iom0s8_top_ground_hvc_wpad s8iom0s8_top_ground_hvc_base ( 
+	.vssa(vssa),
+	.vdda(vdda),
+	.vswitch(vswitch),
+	.vddio_q(vddio_q),
+	.vcchib(vcchib),
+	.vddio(vddio),
+	.vccd(vccd),
+	.vssio(vssio),
+	.vssd(vssd),
+	.vssio_q(vssio_q),
+	.g_pad(vssa),
+	.ogc_hvc(),
+	.amuxbus_a(amuxbus_a),
+	.amuxbus_b(amuxbus_b),
+	.drn_hvc(drn_hvc),
+	.src_bdy_hvc(src_bdy_hvc)
+  );
+
+endmodule
+
+module s8iom0_corner_pad (amuxbus_a, amuxbus_b, 
+	vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+endmodule
+
+module s8iom0s8_com_bus_slice (amuxbus_a, amuxbus_b,
+	vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+endmodule
+
+module s8iom0s8_com_bus_slice_1um (amuxbus_a, amuxbus_b,
+	vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+	vssio, vssd, vssio_q
+);
+  inout amuxbus_a;
+  inout amuxbus_b;
+
+  inout vddio;	
+  inout vddio_q;	
+  inout vdda;
+  inout vccd;
+  inout vswitch;
+  inout vcchib;
+  inout vssa;
+  inout vssd;
+  inout vssio_q;
+  inout vssio;
+
+endmodule
+
+module s8iom0_gpiov2_pad (in_h, pad_a_noesd_h, pad_a_esd_0_h, pad_a_esd_1_h,
+    pad, dm, hld_h_n, in, inp_dis, ib_mode_sel, enable_h, enable_vdda_h,
+    enable_inp_h, oe_n, tie_hi_esd, tie_lo_esd, slow, vtrip_sel, hld_ovr,
+    analog_en, analog_sel, enable_vddio, enable_vswitch_h, analog_pol, out,
+    amuxbus_a, amuxbus_b,vssa, vdda, vswitch, vddio_q, vcchib, vddio, vccd,
+    vssio, vssd, vssio_q 
+    );
+
+input out;  		
+input oe_n;  		
+input hld_h_n;		
+input enable_h;
+input enable_inp_h;	
+input enable_vdda_h;	
+input enable_vswitch_h;	
+input enable_vddio;	
+input inp_dis;		
+input ib_mode_sel;
+input vtrip_sel;	
+input slow;		
+input hld_ovr;		
+input analog_en;	
+input analog_sel;	
+input analog_pol;	
+input [2:0] dm;		
+
+	inout vddio;	
+	inout vddio_q;	
+	inout vdda;
+	inout vccd;
+	inout vswitch;
+	inout vcchib;
+	inout vssa;
+	inout vssd;
+	inout vssio_q;
+	inout vssio;
+
+inout pad;
+inout pad_a_noesd_h,pad_a_esd_0_h,pad_a_esd_1_h;
+inout amuxbus_a;
+inout amuxbus_b;
+
+output in;
+output in_h;
+output tie_hi_esd, tie_lo_esd;
+
+// Instantiate original version with metal4-only power bus
+s8iom0s8_top_gpiov2 gpiov2_base (
+    .in_h(in_h),
+    .pad_a_noesd_h(pad_a_noesd_h),
+    .pad_a_esd_0_h(pad_a_esd_0_h),
+    .pad_a_esd_1_h(pad_a_esd_1_h),
+    .pad(pad),
+    .dm(dm),
+    .hld_h_n(hld_h_n),
+    .in(in),
+    .inp_dis(inp_dis),
+    .ib_mode_sel(ib_mode_sel),
+    .enable_h(enable_h),
+    .enable_vdda_h(enable_vdda_h),
+    .enable_inp_h(enable_inp_h),
+    .oe_n(oe_n),
+    .tie_hi_esd(tie_hi_esd),
+    .tie_lo_esd(tie_lo_esd),
+    .slow(slow),
+    .vtrip_sel(vtrip_sel),
+    .hld_ovr(hld_ovr),
+    .analog_en(analog_en),
+    .analog_sel(analog_sel),
+    .enable_vddio(enable_vddio),
+    .enable_vswitch_h(enable_vswitch_h),
+    .analog_pol(analog_pol),
+    .out(out),
+    .amuxbus_a(amuxbus_a),
+    .amuxbus_b(amuxbus_b) ,
+    .vssa(vssa),
+    .vdda(vdda),
+    .vswitch(vswitch),
+    .vddio_q(vddio_q),
+    .vcchib(vcchib),
+    .vddio(vddio),
+    .vccd(vccd),
+    .vssio(vssio),
+    .vssd(vssd),
+    .vssio_q(vssio_q) 
+);
+
+endmodule
diff --git a/sky130/custom/sky130_fd_sc_hd/scs8hd_diode_1.cdl b/sky130/custom/sky130_fd_sc_hd/scs8hd_diode_1.cdl
new file mode 100644
index 0000000..2ae2f88
--- /dev/null
+++ b/sky130/custom/sky130_fd_sc_hd/scs8hd_diode_1.cdl
@@ -0,0 +1,7 @@
+* Additional subcircuits not in the vendor CDL library
+
+.SUBCKT scs8hd_diode_1 DIODE vgnd vnb vpb vpwr
+*.PININFO DIODE:I vgnd:I vnb:I vpb:I vpwr:I
+* NOTE:  Tap diode is not represented here.
+.ENDS
+
diff --git a/sky130/custom/sky130_fd_sc_hd/scs8hd_diode_2.cdl b/sky130/custom/sky130_fd_sc_hd/scs8hd_diode_2.cdl
new file mode 100644
index 0000000..2abb8b4
--- /dev/null
+++ b/sky130/custom/sky130_fd_sc_hd/scs8hd_diode_2.cdl
@@ -0,0 +1,6 @@
+* Additional subcircuits not in the vendor CDL library
+
+.SUBCKT scs8hd_diode_2 DIODE vgnd vnb vpb vpwr
+*.PININFO DIODE:I vgnd:I vnb:I vpb:I vpwr:I
+* NOTE:  Tap diode is not represented here.
+.ENDS
diff --git a/sky130/custom/techLEF/sky130_fd_sc_hd_tech.lef b/sky130/custom/techLEF/sky130_fd_sc_hd_tech.lef
new file mode 100644
index 0000000..d5e0b31
--- /dev/null
+++ b/sky130/custom/techLEF/sky130_fd_sc_hd_tech.lef
@@ -0,0 +1,746 @@
+VERSION 5.7 ;
+BUSBITCHARS "[]" ;
+DIVIDERCHAR "/" ;
+UNITS
+  TIME NANOSECONDS 1 ;
+  CAPACITANCE PICOFARADS 1 ;
+  RESISTANCE OHMS 1 ;
+  DATABASE MICRONS 1000 ;
+END UNITS
+MANUFACTURINGGRID 0.005 ;
+
+SITE unithd
+    SYMMETRY Y  ;
+    CLASS CORE  ;
+    SIZE  0.460 BY 2.720 ;
+END unithd
+
+LAYER li1
+    TYPE ROUTING ;
+    DIRECTION VERTICAL ;
+
+    PITCH 0.46 0.34 ;
+    OFFSET 0.23 0.17 ;
+
+    WIDTH    0.170 ;                    # LI 1
+    # SPACING  0.170 ;                    # LI 2
+  SPACINGTABLE
+    PARALLELRUNLENGTH 0
+    WIDTH 0 0.170000 ;
+    AREA 0.0561 ;                       # LI 6
+    THICKNESS 0.10 ; 
+
+    RESISTANCE RPERSQ 12.2 ;
+
+    ANTENNAMODEL OXIDE1 ;
+    ANTENNADIFFSIDEAREARATIO PWL ( ( 0.0 75.0 ) ( 0.0125 75.0 ) ( 0.0225 85.125 ) ( 22.5 10200.0 ) ) ;
+
+
+END li1
+
+LAYER mcon
+  TYPE CUT ;
+  WIDTH   0.17 ;		# Mcon 1
+  SPACING 0.19 ;		# Mcon 2
+  ENCLOSURE BELOW 0.0 0.0 ;	# Mcon 4
+  ENCLOSURE ABOVE 0.030 0.060 ; # Met1 4 / Met1 5
+
+  DCCURRENTDENSITY AVERAGE 0.36 ; # mA per via Iavg_max at Tj = 90oC
+  ANTENNADIFFAREARATIO PWL ( ( 0.0 3.0 ) ( 0.0125 3.0 ) ( 0.0225 3.405 ) ( 22.5 408.0 ) ) ;
+
+END mcon
+
+LAYER met1
+    TYPE ROUTING ;
+    DIRECTION HORIZONTAL ;
+
+    PITCH 0.34 ;
+    OFFSET 0.17 ;
+
+    WIDTH    0.140 ;                    # Met1 1
+    #SPACING  0.140 ;                    # Met1 2
+    #SPACING  0.280 RANGE 3.001 100 ;	# Met1 3b
+    SPACINGTABLE
+	  PARALLELRUNLENGTH 0.000
+	    WIDTH 0.000 0.140000
+	    WIDTH 3.000000 0.280000
+	    ;
+    AREA 0.083 ;                        # Met1 6
+    THICKNESS 0.35 ; 
+
+    ANTENNAMODEL OXIDE1 ;
+    ANTENNADIFFSIDEAREARATIO PWL ( ( 0.000000 400.000000 ) ( 0.012500 400.000000 ) ( 0.022500 2609.000000 ) ( 22.500000 11600.000000 ) ) ;
+
+    EDGECAPACITANCE 1.79E-6 ;
+    CAPACITANCE CPERSQDIST 25.8E-6 ;
+    DCCURRENTDENSITY AVERAGE 2.8 ; # mA/um Iavg_max at Tj = 90oC
+    ACCURRENTDENSITY RMS 6.1 ; # mA/um Irms_max at Tj = 90oC
+    MAXIMUMDENSITY 70.0 ;
+    DENSITYCHECKWINDOW 700.0 700.0 ;
+    DENSITYCHECKSTEP 70.0 ;
+
+    RESISTANCE RPERSQ 0.125 ;
+END met1
+
+LAYER via
+  TYPE CUT ;
+  WIDTH   0.15 ;		# Via 1a
+  SPACING 0.17  ;		# Via 2
+  ENCLOSURE BELOW 0.055 0.085 ; # Via 4a / Via 5a
+  ENCLOSURE ABOVE 0.055 0.085 ; # Met2 4 / Met2 5
+  ANTENNADIFFAREARATIO PWL ( ( 0.0 6.0 ) ( 0.0125 6.0 ) ( 0.0225 6.81 ) ( 22.5 816.0 ) ) ;
+  DCCURRENTDENSITY AVERAGE 0.29 ; # mA per via Iavg_max at Tj = 90oC
+END via
+
+LAYER met2
+    TYPE ROUTING ;
+    DIRECTION VERTICAL ;
+
+    PITCH  0.46 ;
+    OFFSET 0.23 ;
+
+    WIDTH    0.140 ;                    # Met2 1
+    #SPACING  0.140 ;                    # Met2 2
+    #SPACING  0.280 RANGE 3.001 100 ;	# Met2 3b
+    SPACINGTABLE
+	  PARALLELRUNLENGTH 0.000
+	    WIDTH 0.000 0.140000
+	    WIDTH 3.000000 0.28000 ;
+    AREA 0.0676 ;                       # Met2 6
+    THICKNESS 0.35 ; 
+
+    ANTENNAMODEL OXIDE1 ;
+    CAPACITANCE CPERSQDIST 17.5E-6 ;
+    DCCURRENTDENSITY AVERAGE 2.8 ; # mA/um Iavg_max at Tj = 90oC
+    ACCURRENTDENSITY RMS 6.1 ; # mA/um Irms_max at Tj = 90oC
+    ANTENNADIFFSIDEAREARATIO PWL ( ( 0.0 400.0 ) ( 0.0125 400.0 ) ( 0.0225 2609.0 ) ( 22.5 11600.0 ) ) ;
+    
+    MAXIMUMDENSITY 70.0 ;
+    DENSITYCHECKWINDOW 700.0 700.0 ;
+    DENSITYCHECKSTEP 70.0 ;
+    RESISTANCE RPERSQ 0.125 ;
+END met2
+
+LAYER via2
+  TYPE CUT ;
+  WIDTH   0.20 ;		# Via2 1
+  SPACING 0.20 ;		# Via2 2
+  ENCLOSURE BELOW 0.040 0.085 ;	# Via2 4
+  ENCLOSURE ABOVE 0.065 0.065 ;	# Met3 4
+  ANTENNADIFFAREARATIO PWL ( ( 0.0 6.0 ) ( 0.0125 6.0 ) ( 0.0225 6.81 ) ( 22.5 816.0 ) ) ;
+  DCCURRENTDENSITY AVERAGE 0.48 ; # mA per via Iavg_max at Tj = 90oC
+
+END via2
+
+LAYER met3
+    TYPE ROUTING ;
+    DIRECTION HORIZONTAL ;
+
+    PITCH  0.68 ;
+    OFFSET 0.34 ;
+
+    WIDTH    0.300 ;            # Met3 1
+    #SPACING  0.300 ;		# Met3 2
+    SPACINGTABLE
+	    PARALLELRUNLENGTH 0
+	    WIDTH 0 0.30
+	    WIDTH 3.0 0.40 ;
+    AREA     0.240 ;            # Met3 6
+    THICKNESS 0.8 ;
+
+    EDGECAPACITANCE 1.86E-6 ;
+    CAPACITANCE CPERSQDIST 12.6E-6 ;
+    DCCURRENTDENSITY AVERAGE 6.8 ; # mA/um Iavg_max at Tj = 90oC
+    ACCURRENTDENSITY RMS 14.9 ; # mA/um Irms_max at Tj = 90oC
+
+    ANTENNAMODEL OXIDE1 ;
+    ANTENNADIFFSIDEAREARATIO PWL ( ( 0.0 400.0 ) ( 0.0125 400.0 ) ( 0.0225 2609.0 ) ( 22.5 11600.0 ) ) ;
+
+    MAXIMUMDENSITY 70.0 ;
+    DENSITYCHECKWINDOW 700.0 700.0 ;
+    DENSITYCHECKSTEP 70.0 ;
+    RESISTANCE RPERSQ 0.047 ;
+END met3
+
+LAYER via3
+  TYPE CUT ;
+
+  WIDTH   0.20 ;		# Via3 1
+  SPACING 0.20 ;		# Via3 2
+  ENCLOSURE BELOW 0.060 0.090 ;	# Via3 4 / Via3 5
+  ENCLOSURE ABOVE 0.065 0.065 ;	# Met4 3
+  ANTENNADIFFAREARATIO PWL ( ( 0.0 6.0 ) ( 0.0125 6.0 ) ( 0.0225 6.81 ) ( 22.5 816.0 ) ) ;
+  DCCURRENTDENSITY AVERAGE 0.48 ; # mA per via Iavg_max at Tj = 90oC
+END via3
+
+LAYER met4
+    TYPE ROUTING ;
+    DIRECTION VERTICAL ;
+
+    PITCH  0.92 ;
+    OFFSET 0.46 ;
+
+    WIDTH    0.300 ;            # Met4 1
+    #SPACING  0.300 ;		# Met4 2
+    
+    SPACINGTABLE
+	    PARALLELRUNLENGTH 0
+	    WIDTH 0 0.30
+	    WIDTH 3.0 0.40 ;
+    AREA     0.240 ;            # Met4 4a
+
+    THICKNESS 0.8 ;
+
+    EDGECAPACITANCE 1.29E-6 ;
+    CAPACITANCE CPERSQDIST 8.67E-6 ;
+    DCCURRENTDENSITY AVERAGE 6.8 ; # mA/um Iavg_max at Tj = 90oC
+    ACCURRENTDENSITY RMS 14.9 ; # mA/um Irms_max at Tj = 90oC
+    ANTENNAMODEL OXIDE1 ;
+    ANTENNADIFFSIDEAREARATIO PWL ( ( 0.0 400.0 ) ( 0.0125 400.0 ) ( 0.0225 2609.0 ) ( 22.5 11600.0 ) ) ;
+
+    MAXIMUMDENSITY 70.0 ;
+    DENSITYCHECKWINDOW 700.0 700.0 ;
+    DENSITYCHECKSTEP 70.0 ;
+    RESISTANCE RPERSQ 0.047 ;
+END met4
+
+LAYER via4
+  TYPE CUT ;
+
+  WIDTH   0.80 ;		# Via4 1
+  SPACING 0.80 ;		# Via4 2
+  ENCLOSURE BELOW 0.190 0.190 ;	# Via4 4
+  ENCLOSURE ABOVE 0.310 0.310 ;	# Met5 3
+  ANTENNADIFFAREARATIO PWL ( ( 0.0 6.0 ) ( 0.0125 6.0 ) ( 0.0225 6.81 ) ( 22.5 816.0 ) ) ;
+  DCCURRENTDENSITY AVERAGE 2.49 ; # mA per via Iavg_max at Tj = 90oC
+END via4
+
+LAYER met5
+    TYPE ROUTING ;
+    DIRECTION HORIZONTAL ;
+
+    PITCH  3.4 ;
+    OFFSET 1.7 ; 
+
+    WIDTH    1.600 ;       # Met5 1
+    #SPACING  1.600 ;       # Met5 2
+    SPACINGTABLE
+	    PARALLELRUNLENGTH 0
+	    WIDTH 0 1.600 ;
+    AREA     4.000 ;       # Met5 4
+
+    THICKNESS 1.2 ;
+
+    ANTENNAMODEL OXIDE1 ;
+    EDGECAPACITANCE 4.96E-6 ;
+    CAPACITANCE CPERSQDIST 6.48E-6 ;
+    DCCURRENTDENSITY AVERAGE 10.17 ; # mA/um Iavg_max at Tj = 90oC
+    ACCURRENTDENSITY RMS 22.34 ; # mA/um Irms_max at Tj = 90oC
+    ANTENNADIFFSIDEAREARATIO PWL ( ( 0.0 400.0 ) ( 0.0125 400.0 ) ( 0.0225 2609.0 ) ( 22.5 11600.0 ) ) ;
+    
+    RESISTANCE RPERSQ 0.0285 ;
+END met5
+
+### Routing via cells section   ###
+# Plus via rule, metals are along the prefered direction
+VIA L1M1_PR DEFAULT
+  LAYER mcon ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  LAYER li1 ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  LAYER met1 ;
+  RECT -0.145000 -0.115000 0.145000 0.115000 ;
+END L1M1_PR
+
+VIARULE L1M1_PR GENERATE
+  LAYER li1 ;
+  ENCLOSURE 0.000000 0.000000 ;
+  LAYER met1 ;
+  ENCLOSURE 0.060000 0.030000 ;
+  LAYER mcon ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  SPACING 0.360000 BY 0.360000 ;
+END L1M1_PR
+
+# Plus via rule, metals are along the non prefered direction
+VIA L1M1_PR_R DEFAULT
+  LAYER mcon ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  LAYER li1 ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  LAYER met1 ;
+  RECT -0.115000 -0.145000 0.115000 0.145000 ;
+END L1M1_PR_R
+
+VIARULE L1M1_PR_R GENERATE
+  LAYER li1 ;
+  ENCLOSURE 0.000000 0.000000 ;
+  LAYER met1 ;
+  ENCLOSURE 0.030000 0.060000 ;
+  LAYER mcon ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  SPACING 0.360000 BY 0.360000 ;
+END L1M1_PR_R
+
+# Minus via rule, lower layer metal is along prefered direction
+VIA L1M1_PR_M DEFAULT
+  LAYER mcon ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  LAYER li1 ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  LAYER met1 ;
+  RECT -0.115000 -0.145000 0.115000 0.145000 ;
+END L1M1_PR_M
+
+VIARULE L1M1_PR_M GENERATE
+  LAYER li1 ;
+  ENCLOSURE 0.000000 0.000000 ;
+  LAYER met1 ;
+  ENCLOSURE 0.030000 0.060000 ;
+  LAYER mcon ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  SPACING 0.360000 BY 0.360000 ;
+END L1M1_PR_M
+
+# Minus via rule, upper layer metal is along prefered direction
+VIA L1M1_PR_MR DEFAULT
+  LAYER mcon ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  LAYER li1 ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  LAYER met1 ;
+  RECT -0.145000 -0.115000 0.145000 0.115000 ;
+END L1M1_PR_MR
+
+VIARULE L1M1_PR_MR GENERATE
+  LAYER li1 ;
+  ENCLOSURE 0.000000 0.000000 ;
+  LAYER met1 ;
+  ENCLOSURE 0.060000 0.030000 ;
+  LAYER mcon ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  SPACING 0.360000 BY 0.360000 ;
+END L1M1_PR_MR
+
+# Centered via rule, we really do not want to use it
+VIA L1M1_PR_C DEFAULT
+  LAYER mcon ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  LAYER li1 ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  LAYER met1 ;
+  RECT -0.145000 -0.145000 0.145000 0.145000 ;
+END L1M1_PR_C
+
+VIARULE L1M1_PR_C GENERATE
+  LAYER li1 ;
+  ENCLOSURE 0.000000 0.000000 ;
+  LAYER met1 ;
+  ENCLOSURE 0.060000 0.060000 ;
+  LAYER mcon ;
+  RECT -0.085000 -0.085000 0.085000 0.085000 ;
+  SPACING 0.360000 BY 0.360000 ;
+END L1M1_PR_C
+
+# Plus via rule, metals are along the prefered direction
+VIA M1M2_PR DEFAULT
+  LAYER via ;
+  RECT -0.075000 -0.075000 0.075000 0.075000 ;
+  LAYER met1 ;
+  RECT -0.160000 -0.130000 0.160000 0.130000 ;
+  LAYER met2 ;
+  RECT -0.130000 -0.160000 0.130000 0.160000 ;
+END M1M2_PR
+
+VIARULE M1M2_PR GENERATE
+  LAYER met1 ;
+  ENCLOSURE 0.085000 0.055000 ;
+  LAYER met2 ;
+  ENCLOSURE 0.055000 0.085000 ;
+  LAYER via ;
+  RECT -0.075000 -0.075000 0.075000 0.075000 ;
+  SPACING 0.320000 BY 0.320000 ;
+END M1M2_PR
+
+# Plus via rule, metals are along the non prefered direction
+VIA M1M2_PR_R DEFAULT
+  LAYER via ;
+  RECT -0.075000 -0.075000 0.075000 0.075000 ;
+  LAYER met1 ;
+  RECT -0.130000 -0.160000 0.130000 0.160000 ;
+  LAYER met2 ;
+  RECT -0.160000 -0.130000 0.160000 0.130000 ;
+END M1M2_PR_R
+
+VIARULE M1M2_PR_R GENERATE
+  LAYER met1 ;
+  ENCLOSURE 0.055000 0.085000 ;
+  LAYER met2 ;
+  ENCLOSURE 0.085000 0.055000 ;
+  LAYER via ;
+  RECT -0.075000 -0.075000 0.075000 0.075000 ;
+  SPACING 0.320000 BY 0.320000 ;
+END M1M2_PR_R
+
+# Minus via rule, lower layer metal is along prefered direction
+VIA M1M2_PR_M DEFAULT
+  LAYER via ;
+  RECT -0.075000 -0.075000 0.075000 0.075000 ;
+  LAYER met1 ;
+  RECT -0.160000 -0.130000 0.160000 0.130000 ;
+  LAYER met2 ;
+  RECT -0.160000 -0.130000 0.160000 0.130000 ;
+END M1M2_PR_M
+
+VIARULE M1M2_PR_M GENERATE
+  LAYER met1 ;
+  ENCLOSURE 0.085000 0.055000 ;
+  LAYER met2 ;
+  ENCLOSURE 0.085000 0.055000 ;
+  LAYER via ;
+  RECT -0.075000 -0.075000 0.075000 0.075000 ;
+  SPACING 0.320000 BY 0.320000 ;
+END M1M2_PR_M
+
+# Minus via rule, upper layer metal is along prefered direction
+VIA M1M2_PR_MR DEFAULT
+  LAYER via ;
+  RECT -0.075000 -0.075000 0.075000 0.075000 ;
+  LAYER met1 ;
+  RECT -0.130000 -0.160000 0.130000 0.160000 ;
+  LAYER met2 ;
+  RECT -0.130000 -0.160000 0.130000 0.160000 ;
+END M1M2_PR_MR
+
+VIARULE M1M2_PR_MR GENERATE
+  LAYER met1 ;
+  ENCLOSURE 0.055000 0.085000 ;
+  LAYER met2 ;
+  ENCLOSURE 0.055000 0.085000 ;
+  LAYER via ;
+  RECT -0.075000 -0.075000 0.075000 0.075000 ;
+  SPACING 0.320000 BY 0.320000 ;
+END M1M2_PR_MR
+
+# Centered via rule, we really do not want to use it
+VIA M1M2_PR_C DEFAULT
+  LAYER via ;
+  RECT -0.075000 -0.075000 0.075000 0.075000 ;
+  LAYER met1 ;
+  RECT -0.160000 -0.160000 0.160000 0.160000 ;
+  LAYER met2 ;
+  RECT -0.160000 -0.160000 0.160000 0.160000 ;
+END M1M2_PR_C
+
+VIARULE M1M2_PR_C GENERATE
+  LAYER met1 ;
+  ENCLOSURE 0.085000 0.085000 ;
+  LAYER met2 ;
+  ENCLOSURE 0.085000 0.085000 ;
+  LAYER via ;
+  RECT -0.075000 -0.075000 0.075000 0.075000 ;
+  SPACING 0.320000 BY 0.320000 ;
+END M1M2_PR_C
+
+# Plus via rule, metals are along the prefered direction
+VIA M2M3_PR DEFAULT
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met2 ;
+  RECT -0.140000 -0.185000 0.140000 0.185000 ;
+  LAYER met3 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M2M3_PR
+
+VIARULE M2M3_PR GENERATE
+  LAYER met2 ;
+  ENCLOSURE 0.040000 0.085000 ;
+  LAYER met3 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M2M3_PR
+
+# Plus via rule, metals are along the non prefered direction
+VIA M2M3_PR_R DEFAULT
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met2 ;
+  RECT -0.185000 -0.140000 0.185000 0.140000 ;
+  LAYER met3 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M2M3_PR_R
+
+VIARULE M2M3_PR_R GENERATE
+  LAYER met2 ;
+  ENCLOSURE 0.085000 0.040000 ;
+  LAYER met3 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M2M3_PR_R
+
+# Minus via rule, lower layer metal is along prefered direction
+VIA M2M3_PR_M DEFAULT
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met2 ;
+  RECT -0.140000 -0.185000 0.140000 0.185000 ;
+  LAYER met3 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M2M3_PR_M
+
+VIARULE M2M3_PR_M GENERATE
+  LAYER met2 ;
+  ENCLOSURE 0.040000 0.085000 ;
+  LAYER met3 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M2M3_PR_M
+
+# Minus via rule, upper layer metal is along prefered direction
+VIA M2M3_PR_MR DEFAULT
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met2 ;
+  RECT -0.185000 -0.140000 0.185000 0.140000 ;
+  LAYER met3 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M2M3_PR_MR
+
+VIARULE M2M3_PR_MR GENERATE
+  LAYER met2 ;
+  ENCLOSURE 0.085000 0.040000 ;
+  LAYER met3 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M2M3_PR_MR
+
+# Centered via rule, we really do not want to use it
+VIA M2M3_PR_C DEFAULT
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met2 ;
+  RECT -0.185000 -0.185000 0.185000 0.185000 ;
+  LAYER met3 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M2M3_PR_C
+
+VIARULE M2M3_PR_C GENERATE
+  LAYER met2 ;
+  ENCLOSURE 0.085000 0.085000 ;
+  LAYER met3 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M2M3_PR_C
+
+# Plus via rule, metals are along the prefered direction
+VIA M3M4_PR DEFAULT
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met3 ;
+  RECT -0.190000 -0.160000 0.190000 0.160000 ;
+  LAYER met4 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M3M4_PR
+
+VIARULE M3M4_PR GENERATE
+  LAYER met3 ;
+  ENCLOSURE 0.090000 0.060000 ;
+  LAYER met4 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M3M4_PR
+
+# Plus via rule, metals are along the non prefered direction
+VIA M3M4_PR_R DEFAULT
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met3 ;
+  RECT -0.160000 -0.190000 0.160000 0.190000 ;
+  LAYER met4 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M3M4_PR_R
+
+VIARULE M3M4_PR_R GENERATE
+  LAYER met3 ;
+  ENCLOSURE 0.060000 0.090000 ;
+  LAYER met4 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M3M4_PR_R
+
+# Minus via rule, lower layer metal is along prefered direction
+VIA M3M4_PR_M DEFAULT
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met3 ;
+  RECT -0.190000 -0.160000 0.190000 0.160000 ;
+  LAYER met4 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M3M4_PR_M
+
+VIARULE M3M4_PR_M GENERATE
+  LAYER met3 ;
+  ENCLOSURE 0.090000 0.060000 ;
+  LAYER met4 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M3M4_PR_M
+
+# Minus via rule, upper layer metal is along prefered direction
+VIA M3M4_PR_MR DEFAULT
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met3 ;
+  RECT -0.160000 -0.190000 0.160000 0.190000 ;
+  LAYER met4 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M3M4_PR_MR
+
+VIARULE M3M4_PR_MR GENERATE
+  LAYER met3 ;
+  ENCLOSURE 0.060000 0.090000 ;
+  LAYER met4 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M3M4_PR_MR
+
+# Centered via rule, we really do not want to use it
+VIA M3M4_PR_C DEFAULT
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met3 ;
+  RECT -0.190000 -0.190000 0.190000 0.190000 ;
+  LAYER met4 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M3M4_PR_C
+
+VIARULE M3M4_PR_C GENERATE
+  LAYER met3 ;
+  ENCLOSURE 0.090000 0.090000 ;
+  LAYER met4 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M3M4_PR_C
+
+# Plus via rule, metals are along the prefered direction
+VIA M4M5_PR DEFAULT
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  LAYER met4 ;
+  RECT -0.590000 -0.590000 0.590000 0.590000 ;
+  LAYER met5 ;
+  RECT -0.710000 -0.710000 0.710000 0.710000 ;
+END M4M5_PR
+
+VIARULE M4M5_PR GENERATE
+  LAYER met4 ;
+  ENCLOSURE 0.190000 0.190000 ;
+  LAYER met5 ;
+  ENCLOSURE 0.310000 0.310000 ;
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  SPACING 1.600000 BY 1.600000 ;
+END M4M5_PR
+
+# Plus via rule, metals are along the non prefered direction
+VIA M4M5_PR_R DEFAULT
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  LAYER met4 ;
+  RECT -0.590000 -0.590000 0.590000 0.590000 ;
+  LAYER met5 ;
+  RECT -0.710000 -0.710000 0.710000 0.710000 ;
+END M4M5_PR_R
+
+VIARULE M4M5_PR_R GENERATE
+  LAYER met4 ;
+  ENCLOSURE 0.190000 0.190000 ;
+  LAYER met5 ;
+  ENCLOSURE 0.310000 0.310000 ;
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  SPACING 1.600000 BY 1.600000 ;
+END M4M5_PR_R
+
+# Minus via rule, lower layer metal is along prefered direction
+VIA M4M5_PR_M DEFAULT
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  LAYER met4 ;
+  RECT -0.590000 -0.590000 0.590000 0.590000 ;
+  LAYER met5 ;
+  RECT -0.710000 -0.710000 0.710000 0.710000 ;
+END M4M5_PR_M
+
+VIARULE M4M5_PR_M GENERATE
+  LAYER met4 ;
+  ENCLOSURE 0.190000 0.190000 ;
+  LAYER met5 ;
+  ENCLOSURE 0.310000 0.310000 ;
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  SPACING 1.600000 BY 1.600000 ;
+END M4M5_PR_M
+
+# Minus via rule, upper layer metal is along prefered direction
+VIA M4M5_PR_MR DEFAULT
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  LAYER met4 ;
+  RECT -0.590000 -0.590000 0.590000 0.590000 ;
+  LAYER met5 ;
+  RECT -0.710000 -0.710000 0.710000 0.710000 ;
+END M4M5_PR_MR
+
+VIARULE M4M5_PR_MR GENERATE
+  LAYER met4 ;
+  ENCLOSURE 0.190000 0.190000 ;
+  LAYER met5 ;
+  ENCLOSURE 0.310000 0.310000 ;
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  SPACING 1.600000 BY 1.600000 ;
+END M4M5_PR_MR
+
+# Centered via rule, we really do not want to use it
+VIA M4M5_PR_C DEFAULT
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  LAYER met4 ;
+  RECT -0.590000 -0.590000 0.590000 0.590000 ;
+  LAYER met5 ;
+  RECT -0.710000 -0.710000 0.710000 0.710000 ;
+END M4M5_PR_C
+
+VIARULE M4M5_PR_C GENERATE
+  LAYER met4 ;
+  ENCLOSURE 0.190000 0.190000 ;
+  LAYER met5 ;
+  ENCLOSURE 0.310000 0.310000 ;
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  SPACING 1.600000 BY 1.600000 ;
+END M4M5_PR_C
+###  end of single via cells   ###
+
+END LIBRARY
diff --git a/sky130/custom/techLEF/sky130_fd_sc_hs_tech.lef b/sky130/custom/techLEF/sky130_fd_sc_hs_tech.lef
new file mode 100644
index 0000000..7f8f3af
--- /dev/null
+++ b/sky130/custom/techLEF/sky130_fd_sc_hs_tech.lef
@@ -0,0 +1,712 @@
+
+NAMESCASESENSITIVE ON ;
+BUSBITCHARS "[]" ;
+DIVIDERCHAR "/" ;
+UNITS
+  TIME NANOSECONDS 1 ;
+  CAPACITANCE PICOFARADS 1 ;
+  RESISTANCE OHMS 1 ;
+  DATABASE MICRONS 1000 ;
+END UNITS
+MANUFACTURINGGRID 0.005 ;
+
+SITE unitehd
+    SYMMETRY Y  ;
+    CLASS CORE  ;
+    SIZE  0.460 BY 3.400 ;
+END unitehd
+
+######  Starting overlap layers #####
+# ******** Layer OverlapCheck, type blockage, number 90 **************
+LAYER OverlapCheck
+  TYPE OVERLAP ;
+END OverlapCheck
+
+######  Starting routing layers - metal and via #####
+# ******** Layer li1, type routing, number 56 **************
+LAYER li1
+  TYPE ROUTING ;
+  DIRECTION VERTICAL ;
+  PITCH 0.48 ;
+  MINWIDTH 0.170000 ;
+  WIDTH 0.170000 ;
+  AREA 0.028900 ;
+  SPACINGTABLE
+    PARALLELRUNLENGTH 0
+    WIDTH 0 0.170000 ;
+  THICKNESS 0.100000 ;
+  EDGECAPACITANCE 3.26E-6 ;
+  CAPACITANCE CPERSQDIST 36.9E-6 ;
+  RESISTANCE RPERSQ 12.2 ;
+#  DCCURRENTDENSITY AVERAGE (no limit on this layer) ;
+  ANTENNADIFFSIDEAREARATIO PWL ( ( 0.000000 75.000000 ) ( 0.012500 75.000000 ) ( 0.022500 85.125000 ) ( 22.500000 10200.000000 ) ) ;
+END li1
+
+# ******** Layer mcon, type routing, number 35 **************
+LAYER mcon
+  TYPE CUT ;
+  SPACING 0.190000 ;
+  WIDTH 0.170000 ;
+  ANTENNADIFFAREARATIO PWL ( ( 0.000000 3.000000 ) ( 0.012500 3.000000 ) ( 0.022500 3.405000 ) ( 22.500000 408.000000 ) ) ;
+  DCCURRENTDENSITY AVERAGE 0.36 ; # mA per via Iavg_max at Tj = 90oC
+  ENCLOSURE BELOW 0.000000 0.000000 ;
+  ENCLOSURE ABOVE 0.000000 0.000000 ;
+END mcon
+
+# ******** Layer met1, type routing, number 36 **************
+LAYER met1
+  TYPE ROUTING ;
+  DIRECTION HORIZONTAL ;
+  PITCH 0.37 ;
+  MINENCLOSEDAREA 0.140000 ;
+  MINWIDTH 0.140000 ;
+  WIDTH 0.140000 ;
+  AREA 0.083000 ;
+  SPACINGTABLE
+  PARALLELRUNLENGTH 0.000
+    WIDTH 0.000 0.140000
+    WIDTH 3.000000 0.280000
+    ;
+  THICKNESS 0.350000 ;
+  EDGECAPACITANCE 1.79E-6 ;
+  CAPACITANCE CPERSQDIST 25.8E-6 ;
+  RESISTANCE RPERSQ 0.125 ;
+  DCCURRENTDENSITY AVERAGE 2.8 ; # mA/um Iavg_max at Tj = 90oC
+  ACCURRENTDENSITY RMS 6.1 ; # mA/um Irms_max at Tj = 90oC
+  ANTENNADIFFSIDEAREARATIO PWL ( ( 0.000000 400.000000 ) ( 0.012500 400.000000 ) ( 0.022500 2609.000000 ) ( 22.500000 11600.000000 ) ) ;
+END met1
+
+# ******** Layer via, type routing, number 40 **************
+LAYER via1
+  TYPE CUT ;
+  SPACING 0.170000 ;
+  WIDTH 0.150000 ;
+  ANTENNADIFFAREARATIO PWL ( ( 0.000000 6.000000 ) ( 0.012500 6.000000 ) ( 0.022500 6.810000 ) ( 22.500000 816.000000 ) ) ;
+  DCCURRENTDENSITY AVERAGE 0.29 ; # mA per via Iavg_max at Tj = 90oC
+  ENCLOSURE BELOW 0.000000 0.000000 ;
+  ENCLOSURE ABOVE 0.000000 0.000000 ;
+END via1
+
+# ******** Layer met2, type routing, number 41 **************
+LAYER met2
+  TYPE ROUTING ;
+  DIRECTION VERTICAL ;
+  PITCH 0.48 ;
+  MINENCLOSEDAREA 0.140000 ;
+  MINWIDTH 0.140000 ;
+  WIDTH 0.140000 ;
+  AREA 0.067600 ;
+  SPACINGTABLE
+  PARALLELRUNLENGTH 0.000
+    WIDTH 0.000 0.140000
+    WIDTH 3.000000 0.280000
+    ;
+  THICKNESS 0.350000 ;
+  EDGECAPACITANCE 1.22E-6 ;
+  CAPACITANCE CPERSQDIST 17.5E-6 ;
+  RESISTANCE RPERSQ 0.125 ;
+  DCCURRENTDENSITY AVERAGE 2.8 ; # mA/um Iavg_max at Tj = 90oC
+  ACCURRENTDENSITY RMS 6.1 ; # mA/um Irms_max at Tj = 90oC
+  ANTENNADIFFSIDEAREARATIO PWL ( ( 0.000000 400.000000 ) ( 0.012500 400.000000 ) ( 0.022500 2609.000000 ) ( 22.500000 11600.000000 ) ) ;
+END met2
+
+# ******** Layer via2, type routing, number 44 **************
+LAYER via2
+  TYPE CUT ;
+  SPACING 0.200000 ;
+  WIDTH 0.200000 ;
+  ANTENNADIFFAREARATIO PWL ( ( 0.000000 6.000000 ) ( 0.012500 6.000000 ) ( 0.022500 6.810000 ) ( 22.500000 816.000000 ) ) ;
+  DCCURRENTDENSITY AVERAGE 0.48 ; # mA per via Iavg_max at Tj = 90oC
+  ENCLOSURE BELOW 0.000000 0.000000 ;
+  ENCLOSURE ABOVE 0.000000 0.000000 ;
+END via2
+
+# ******** Layer met3, type routing, number 34 **************
+LAYER met3
+  TYPE ROUTING ;
+  DIRECTION HORIZONTAL ;
+  PITCH 0.666 ;
+  MINWIDTH 0.300000 ;
+  WIDTH 0.300000 ;
+  AREA 0.240000 ;
+  SPACINGTABLE
+  PARALLELRUNLENGTH 0.000
+    WIDTH 0.000 0.300000
+    WIDTH 3.000000 0.400000
+    ;
+  THICKNESS 0.800000 ;
+  EDGECAPACITANCE 1.86E-6 ;
+  CAPACITANCE CPERSQDIST 12.6E-6 ;
+  RESISTANCE RPERSQ 0.047 ;
+  DCCURRENTDENSITY AVERAGE 6.8 ; # mA/um Iavg_max at Tj = 90oC
+  ACCURRENTDENSITY RMS 14.9 ; # mA/um Irms_max at Tj = 90oC
+  ANTENNADIFFSIDEAREARATIO PWL ( ( 0.000000 400.000000 ) ( 0.012500 400.000000 ) ( 0.022500 2609.000000 ) ( 22.500000 11600.000000 ) ) ;
+END met3
+
+# ******** Layer via3, type routing, number 70 **************
+LAYER via3
+  TYPE CUT ;
+  SPACING 0.200000 ;
+  WIDTH 0.200000 ;
+  ANTENNADIFFAREARATIO PWL ( ( 0.000000 6.000000 ) ( 0.012500 6.000000 ) ( 0.022500 6.810000 ) ( 22.500000 816.000000 ) ) ;
+  DCCURRENTDENSITY AVERAGE 0.48 ; # mA per via Iavg_max at Tj = 90oC
+  ENCLOSURE BELOW 0.000000 0.000000 ;
+  ENCLOSURE ABOVE 0.000000 0.000000 ;
+END via3
+
+# ******** Layer met4, type routing, number 71 **************
+LAYER met4
+  TYPE ROUTING ;
+  DIRECTION VERTICAL ;
+  PITCH 0.96 ;
+  MINWIDTH 0.300000 ;
+  WIDTH 0.300000 ;
+  AREA 0.240000 ;
+  SPACINGTABLE
+  PARALLELRUNLENGTH 0.000
+    WIDTH 0.000 0.300000
+    WIDTH 3.000000 0.400000
+    ;
+  THICKNESS 0.800000 ;
+  EDGECAPACITANCE 1.29E-6 ;
+  CAPACITANCE CPERSQDIST 8.67E-6 ;
+  RESISTANCE RPERSQ 0.047 ;
+  DCCURRENTDENSITY AVERAGE 6.8 ; # mA/um Iavg_max at Tj = 90oC
+  ACCURRENTDENSITY RMS 14.9 ; # mA/um Irms_max at Tj = 90oC
+  ANTENNADIFFSIDEAREARATIO PWL ( ( 0.000000 400.000000 ) ( 0.012500 400.000000 ) ( 0.022500 2609.000000 ) ( 22.500000 11600.000000 ) ) ;
+END met4
+
+# ******** Layer via4, type routing, number 58 **************
+LAYER via4
+  TYPE CUT ;
+  SPACING 0.800000 ;
+  WIDTH 0.800000 ;
+  ANTENNADIFFAREARATIO PWL ( ( 0.000000 6.000000 ) ( 0.012500 6.000000 ) ( 0.022500 6.810000 ) ( 22.500000 816.000000 ) ) ;
+  DCCURRENTDENSITY AVERAGE 2.49 ; # mA per via Iavg_max at Tj = 90oC
+  ENCLOSURE BELOW 0.000000 0.000000 ;
+  ENCLOSURE ABOVE 0.000000 0.000000 ;
+END via4
+
+# ******** Layer met5, type routing, number 72 **************
+LAYER met5
+  TYPE ROUTING ;
+  DIRECTION HORIZONTAL ;
+  PITCH 3.3 ;
+  MINWIDTH 1.600000 ;
+  WIDTH 1.600000 ;
+  AREA 2.560000 ;
+  SPACINGTABLE
+    PARALLELRUNLENGTH 0
+    WIDTH 0 1.600000 ;
+  THICKNESS 1.200000 ;
+  EDGECAPACITANCE 4.96E-6 ;
+  CAPACITANCE CPERSQDIST 6.48E-6 ;
+  RESISTANCE RPERSQ 0.047 ;
+  DCCURRENTDENSITY AVERAGE 10.17 ; # mA/um Iavg_max at Tj = 90oC
+  ACCURRENTDENSITY RMS 22.34 ; # mA/um Irms_max at Tj = 90oC
+  ANTENNADIFFSIDEAREARATIO PWL ( ( 0.000000 400.000000 ) ( 0.012500 400.000000 ) ( 0.022500 2609.000000 ) ( 22.500000 11600.000000 ) ) ;
+END met5
+
+######  completed routing layers - metal and via #####
+
+### Routing via cells section   ###
+# Plus via rule, metals are along the prefered direction
+VIA L1M1_PR DEFAULT
+ LAYER mcon ;
+ RECT -0.085 -0.085 0.085 0.085 ;
+ LAYER li1 ;
+ RECT -0.085 -0.165 0.085 0.165 ;
+ LAYER met1 ;
+ RECT -0.16 -0.13 0.16 0.13 ;
+END L1M1_PR
+
+VIARULE L1M1_PR GENERATE
+ LAYER li1 ;
+ ENCLOSURE 0.000 0.080 ;
+ LAYER met1 ;
+ ENCLOSURE 0.030 0.060 ;
+ LAYER mcon ;
+ RECT -0.085 -0.085 0.085 0.085 ;
+ SPACING 0.360 BY 0.360 ;
+END L1M1_PR
+
+# Plus via rule, metals are along the non prefered direction
+VIA L1M1_PR_R DEFAULT
+ LAYER mcon ;
+ RECT -0.085 -0.085 0.085 0.085 ;
+ LAYER li1 ;
+ RECT -0.165 -0.085 0.165 0.085 ;
+ LAYER met1 ;
+ RECT -0.13 -0.16 0.13 0.16 ;
+END L1M1_PR_R
+
+VIARULE L1M1_PR_R GENERATE
+ LAYER li1 ;
+ ENCLOSURE 0.000 0.080 ;
+ LAYER met1 ;
+ ENCLOSURE 0.030 0.060 ;
+ LAYER mcon ;
+ RECT -0.085 -0.085 0.085 0.085 ;
+ SPACING 0.360 BY 0.360 ;
+END L1M1_PR_R
+
+# Minus via rule, lower layer metal is along prefered direction
+VIA L1M1_PR_M DEFAULT
+ LAYER mcon ;
+ RECT -0.085 -0.085 0.085 0.085 ;
+ LAYER li1 ;
+ RECT -0.085 -0.165 0.085 0.165 ;
+ LAYER met1 ;
+ RECT -0.13 -0.16 0.13 0.16 ;
+END L1M1_PR_M
+
+VIARULE L1M1_PR_M GENERATE
+ LAYER li1 ;
+ ENCLOSURE 0.000 0.080 ;
+ LAYER met1 ;
+ ENCLOSURE 0.030 0.060 ;
+ LAYER mcon ;
+ RECT -0.085 -0.085 0.085 0.085 ;
+ SPACING 0.360 BY 0.360 ;
+END L1M1_PR_M
+
+# Minus via rule, upper layer metal is along prefered direction
+VIA L1M1_PR_MR DEFAULT
+ LAYER mcon ;
+ RECT -0.085 -0.085 0.085 0.085 ;
+ LAYER li1 ;
+ RECT -0.165 -0.085 0.165 0.085 ;
+ LAYER met1 ;
+ RECT -0.16 -0.13 0.16 0.13 ;
+END L1M1_PR_MR
+
+VIARULE L1M1_PR_MR GENERATE
+ LAYER li1 ;
+ ENCLOSURE 0.000 0.080 ;
+ LAYER met1 ;
+ ENCLOSURE 0.030 0.060 ;
+ LAYER mcon ;
+ RECT -0.085 -0.085 0.085 0.085 ;
+ SPACING 0.360 BY 0.360 ;
+END L1M1_PR_MR
+
+# Centered via rule, we really do not want to use it
+# VIA L1M1_PR_C DEFAULT
+#   LAYER mcon ;
+#   RECT -0.085000 -0.085000 0.085000 0.085000 ;
+#   LAYER li1 ;
+#   RECT -0.085000 -0.085000 0.085000 0.085000 ;
+#   LAYER met1 ;
+#   RECT -0.145000 -0.145000 0.145000 0.145000 ;
+# END L1M1_PR_C
+
+# VIARULE L1M1_PR_C GENERATE
+#   LAYER li1 ;
+#   ENCLOSURE 0.000000 0.000000 ;
+#   LAYER met1 ;
+#   ENCLOSURE 0.060000 0.060000 ;
+#   LAYER mcon ;
+#   RECT -0.085000 -0.085000 0.085000 0.085000 ;
+#   SPACING 0.360000 BY 0.360000 ;
+# END L1M1_PR_C
+
+# Plus via rule, metals are along the prefered direction
+VIA M1M2_PR DEFAULT
+ LAYER via1 ;
+ RECT -0.075 -0.075 0.075 0.075 ;
+ LAYER met1 ;
+ RECT -0.16 -0.13 0.16 0.13 ;
+ LAYER met2 ;
+ RECT -0.13 -0.16 0.13 0.16 ;
+END M1M2_PR
+
+VIARULE M1M2_PR GENERATE
+ LAYER met1 ;
+ ENCLOSURE 0.055 0.085 ;
+ LAYER met2 ;
+ ENCLOSURE 0.055 0.085 ;
+ LAYER via1 ;
+ RECT -0.075 -0.075 0.075 0.075 ;
+ SPACING 0.320 BY 0.320 ;
+END M1M2_PR
+
+# Plus via rule, metals are along the non prefered direction
+VIA M1M2_PR_R DEFAULT
+ LAYER via1 ;
+ RECT -0.075 -0.075 0.075 0.075 ;
+ LAYER met1 ;
+ RECT -0.13 -0.16 0.13 0.16 ;
+ LAYER met2 ;
+ RECT -0.16 -0.13 0.16 0.13 ;
+END M1M2_PR_R
+
+VIARULE M1M2_PR_R GENERATE
+ LAYER met1 ;
+ ENCLOSURE 0.055 0.085 ;
+ LAYER met2 ;
+ ENCLOSURE 0.055 0.085 ;
+ LAYER via1 ;
+ RECT -0.075 -0.075 0.075 0.075 ;
+ SPACING 0.320 BY 0.320 ;
+END M1M2_PR_R
+
+# Minus via rule, lower layer metal is along prefered direction
+VIA M1M2_PR_M DEFAULT
+ LAYER via1 ;
+ RECT -0.075 -0.075 0.075 0.075 ;
+ LAYER met1 ;
+ RECT -0.16 -0.13 0.16 0.13 ;
+ LAYER met2 ;
+ RECT -0.16 -0.13 0.16 0.13 ;
+END M1M2_PR_M
+
+VIARULE M1M2_PR_M GENERATE
+ LAYER met1 ;
+ ENCLOSURE 0.055 0.085 ;
+ LAYER met2 ;
+ ENCLOSURE 0.055 0.085 ;
+ LAYER via1 ;
+ RECT -0.075 -0.075 0.075 0.075 ;
+ SPACING 0.320 BY 0.320 ;
+END M1M2_PR_M
+
+# Minus via rule, upper layer metal is along prefered direction
+VIA M1M2_PR_MR DEFAULT
+ LAYER via1 ;
+ RECT -0.075 -0.075 0.075 0.075 ;
+ LAYER met1 ;
+ RECT -0.13 -0.16 0.13 0.16 ;
+ LAYER met2 ;
+ RECT -0.13 -0.16 0.13 0.16 ;
+END M1M2_PR_MR
+
+VIARULE M1M2_PR_MR GENERATE
+ LAYER met1 ;
+ ENCLOSURE 0.055 0.085 ;
+ LAYER met2 ;
+ ENCLOSURE 0.055 0.085 ;
+ LAYER via1 ;
+ RECT -0.075 -0.075 0.075 0.075 ;
+ SPACING 0.320 BY 0.320 ;
+END M1M2_PR_MR
+
+# # Centered via rule, we really do not want to use it
+# VIA M1M2_PR_C DEFAULT
+#   LAYER via ;
+#   RECT -0.075000 -0.075000 0.075000 0.075000 ;
+#   LAYER met1 ;
+#   RECT -0.160000 -0.160000 0.160000 0.160000 ;
+#   LAYER met2 ;
+#   RECT -0.160000 -0.160000 0.160000 0.160000 ;
+# END M1M2_PR_C
+
+# VIARULE M1M2_PR_C GENERATE
+#   LAYER met1 ;
+#   ENCLOSURE 0.085000 0.085000 ;
+#   LAYER met2 ;
+#   ENCLOSURE 0.085000 0.085000 ;
+#   LAYER via ;
+#   RECT -0.075000 -0.075000 0.075000 0.075000 ;
+#   SPACING 0.320000 BY 0.320000 ;
+# END M1M2_PR_C
+
+# Plus via rule, metals are along the prefered direction
+VIA M2M3_PR DEFAULT
+ LAYER via2 ;
+ RECT -0.1 -0.1 0.1 0.1 ;
+ LAYER met2 ;
+ RECT -0.14 -0.185 0.14 0.185 ;
+ LAYER met3 ;
+ RECT -0.165 -0.165 0.165 0.165 ;
+END M2M3_PR
+
+VIARULE M2M3_PR GENERATE
+ LAYER met2 ;
+ ENCLOSURE 0.040 0.085 ;
+ LAYER met3 ;
+ ENCLOSURE 0.065 0.065 ;
+ LAYER via2 ;
+ RECT -0.1 -0.1 0.1 0.1 ;
+ SPACING 0.40 BY 0.40 ;
+END M2M3_PR
+
+# Plus via rule, metals are along the non prefered direction
+VIA M2M3_PR_R DEFAULT
+ LAYER via2 ;
+ RECT -0.1 -0.1 0.1 0.1 ;
+ LAYER met2 ;
+ RECT -0.185 -0.14 0.185 0.14 ;
+ LAYER met3 ;
+ RECT -0.165 -0.165 0.165 0.165 ;
+END M2M3_PR_R
+
+VIARULE M2M3_PR_R GENERATE
+ LAYER met2 ;
+ ENCLOSURE 0.040 0.085 ;
+ LAYER met3 ;
+ ENCLOSURE 0.065 0.065 ;
+ LAYER via2 ;
+ RECT -0.1 -0.1 0.1 0.1 ;
+ SPACING 0.40 BY 0.40 ;
+END M2M3_PR_R
+
+# Minus via rule, lower layer metal is along prefered direction
+VIA M2M3_PR_M DEFAULT
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met2 ;
+  RECT -0.140000 -0.185000 0.140000 0.185000 ;
+  LAYER met3 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M2M3_PR_M
+
+VIARULE M2M3_PR_M GENERATE
+  LAYER met2 ;
+  ENCLOSURE 0.040000 0.085000 ;
+  LAYER met3 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M2M3_PR_M
+
+# Minus via rule, upper layer metal is along prefered direction
+VIA M2M3_PR_MR DEFAULT
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met2 ;
+  RECT -0.185000 -0.140000 0.185000 0.140000 ;
+  LAYER met3 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M2M3_PR_MR
+
+VIARULE M2M3_PR_MR GENERATE
+  LAYER met2 ;
+  ENCLOSURE 0.085000 0.040000 ;
+  LAYER met3 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via2 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M2M3_PR_MR
+
+# # Centered via rule, we really do not want to use it
+# VIA M2M3_PR_C DEFAULT
+#   LAYER via2 ;
+#   RECT -0.100000 -0.100000 0.100000 0.100000 ;
+#   LAYER met2 ;
+#   RECT -0.185000 -0.185000 0.185000 0.185000 ;
+#   LAYER met3 ;
+#   RECT -0.165000 -0.165000 0.165000 0.165000 ;
+# END M2M3_PR_C
+
+# VIARULE M2M3_PR_C GENERATE
+#   LAYER met2 ;
+#   ENCLOSURE 0.085000 0.085000 ;
+#   LAYER met3 ;
+#   ENCLOSURE 0.065000 0.065000 ;
+#   LAYER via2 ;
+#   RECT -0.100000 -0.100000 0.100000 0.100000 ;
+#   SPACING 0.400000 BY 0.400000 ;
+# END M2M3_PR_C
+
+# Plus via rule, metals are along the prefered direction
+VIA M3M4_PR DEFAULT
+ LAYER via3 ;
+ RECT -0.1 -0.1 0.1 0.1 ;
+ LAYER met3 ;
+ RECT -0.19 -0.16 0.19 0.16 ;
+ LAYER met4 ;
+ RECT -0.165 -0.165 0.165 0.165 ;
+END M3M4_PR
+
+VIARULE M3M4_PR GENERATE
+ LAYER met3 ;
+ ENCLOSURE 0.06 0.09 ;
+ LAYER met4 ;
+ ENCLOSURE 0.065 0.065 ;
+ LAYER via3 ;
+ RECT -0.1 -0.1 0.1 0.1 ;
+ SPACING 0.40 BY 0.40 ;
+END M3M4_PR
+
+# Plus via rule, metals are along the non prefered direction
+VIA M3M4_PR_R DEFAULT
+ LAYER via3 ;
+ RECT -0.1 -0.1 0.1 0.1 ;
+ LAYER met3 ;
+ RECT -0.16 -0.19 0.16 0.19 ;
+ LAYER met4 ;
+ RECT -0.165 -0.165 0.165 0.165 ;
+END M3M4_PR_R
+
+VIARULE M3M4_PR_R GENERATE
+ LAYER met3 ;
+ ENCLOSURE 0.06 0.09 ;
+ LAYER met4 ;
+ ENCLOSURE 0.065 0.065 ;
+ LAYER via3 ;
+ RECT -0.1 -0.1 0.1 0.1 ;
+ SPACING 0.40 BY 0.40 ;
+END M3M4_PR_R
+
+# Minus via rule, lower layer metal is along prefered direction
+VIA M3M4_PR_M DEFAULT
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met3 ;
+  RECT -0.190000 -0.160000 0.190000 0.160000 ;
+  LAYER met4 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M3M4_PR_M
+
+VIARULE M3M4_PR_M GENERATE
+  LAYER met3 ;
+  ENCLOSURE 0.090000 0.060000 ;
+  LAYER met4 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M3M4_PR_M
+
+# Minus via rule, upper layer metal is along prefered direction
+VIA M3M4_PR_MR DEFAULT
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  LAYER met3 ;
+  RECT -0.160000 -0.190000 0.160000 0.190000 ;
+  LAYER met4 ;
+  RECT -0.165000 -0.165000 0.165000 0.165000 ;
+END M3M4_PR_MR
+
+VIARULE M3M4_PR_MR GENERATE
+  LAYER met3 ;
+  ENCLOSURE 0.060000 0.090000 ;
+  LAYER met4 ;
+  ENCLOSURE 0.065000 0.065000 ;
+  LAYER via3 ;
+  RECT -0.100000 -0.100000 0.100000 0.100000 ;
+  SPACING 0.400000 BY 0.400000 ;
+END M3M4_PR_MR
+
+# # Centered via rule, we really do not want to use it
+# VIA M3M4_PR_C DEFAULT
+#   LAYER via3 ;
+#   RECT -0.100000 -0.100000 0.100000 0.100000 ;
+#   LAYER met3 ;
+#   RECT -0.190000 -0.190000 0.190000 0.190000 ;
+#   LAYER met4 ;
+#   RECT -0.165000 -0.165000 0.165000 0.165000 ;
+# END M3M4_PR_C
+
+# VIARULE M3M4_PR_C GENERATE
+#   LAYER met3 ;
+#   ENCLOSURE 0.090000 0.090000 ;
+#   LAYER met4 ;
+#   ENCLOSURE 0.065000 0.065000 ;
+#   LAYER via3 ;
+#   RECT -0.100000 -0.100000 0.100000 0.100000 ;
+#   SPACING 0.400000 BY 0.400000 ;
+# END M3M4_PR_C
+
+# Plus via rule, metals are along the prefered direction
+VIA M4M5_PR DEFAULT
+ LAYER via4 ;
+ RECT -0.4 -0.4 0.4 0.4 ;
+ LAYER met4 ;
+ RECT -0.59 -0.59 0.59 0.59 ;
+ LAYER met5 ;
+ RECT -0.71 -0.71 0.71 0.71 ;
+END M4M5_PR
+
+VIARULE M4M5_PR GENERATE
+ LAYER met4 ;
+ ENCLOSURE 0.190 0.190 ;
+ LAYER met5 ;
+ ENCLOSURE 0.310 0.310 ;
+ LAYER via4 ;
+ RECT -0.4 -0.4 0.4 0.4 ;
+ SPACING 1.60 BY 1.60 ;
+END M4M5_PR
+
+# Plus via rule, metals are along the non prefered direction
+VIA M4M5_PR_R DEFAULT
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  LAYER met4 ;
+  RECT -0.590000 -0.590000 0.590000 0.590000 ;
+  LAYER met5 ;
+  RECT -0.710000 -0.710000 0.710000 0.710000 ;
+END M4M5_PR_R
+
+VIARULE M4M5_PR_R GENERATE
+  LAYER met4 ;
+  ENCLOSURE 0.190000 0.190000 ;
+  LAYER met5 ;
+  ENCLOSURE 0.310000 0.310000 ;
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  SPACING 1.600000 BY 1.600000 ;
+END M4M5_PR_R
+
+# Minus via rule, lower layer metal is along prefered direction
+VIA M4M5_PR_M DEFAULT
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  LAYER met4 ;
+  RECT -0.590000 -0.590000 0.590000 0.590000 ;
+  LAYER met5 ;
+  RECT -0.710000 -0.710000 0.710000 0.710000 ;
+END M4M5_PR_M
+
+VIARULE M4M5_PR_M GENERATE
+  LAYER met4 ;
+  ENCLOSURE 0.190000 0.190000 ;
+  LAYER met5 ;
+  ENCLOSURE 0.310000 0.310000 ;
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  SPACING 1.600000 BY 1.600000 ;
+END M4M5_PR_M
+
+# Minus via rule, upper layer metal is along prefered direction
+VIA M4M5_PR_MR DEFAULT
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  LAYER met4 ;
+  RECT -0.590000 -0.590000 0.590000 0.590000 ;
+  LAYER met5 ;
+  RECT -0.710000 -0.710000 0.710000 0.710000 ;
+END M4M5_PR_MR
+
+VIARULE M4M5_PR_MR GENERATE
+  LAYER met4 ;
+  ENCLOSURE 0.190000 0.190000 ;
+  LAYER met5 ;
+  ENCLOSURE 0.310000 0.310000 ;
+  LAYER via4 ;
+  RECT -0.400000 -0.400000 0.400000 0.400000 ;
+  SPACING 1.600000 BY 1.600000 ;
+END M4M5_PR_MR
+
+# # Centered via rule, we really do not want to use it
+# VIA M4M5_PR_C DEFAULT
+#   LAYER via4 ;
+#   RECT -0.400000 -0.400000 0.400000 0.400000 ;
+#   LAYER met4 ;
+#   RECT -0.590000 -0.590000 0.590000 0.590000 ;
+#   LAYER met5 ;
+#   RECT -0.710000 -0.710000 0.710000 0.710000 ;
+# END M4M5_PR_C
+
+# VIARULE M4M5_PR_C GENERATE
+#   LAYER met4 ;
+#   ENCLOSURE 0.190000 0.190000 ;
+#   LAYER met5 ;
+#   ENCLOSURE 0.310000 0.310000 ;
+#   LAYER via4 ;
+#   RECT -0.400000 -0.400000 0.400000 0.400000 ;
+#   SPACING 1.600000 BY 1.600000 ;
+# END M4M5_PR_C
+
diff --git a/sky130/sky130.json b/sky130/sky130.json
new file mode 100644
index 0000000..bf54238
--- /dev/null
+++ b/sky130/sky130.json
@@ -0,0 +1,53 @@
+#define DESCRIPTION Skywater 0.13um CMOS, local interconntect + high-resistance poly
+#ifdef METAL5
+#define OPTION1 + 5 metal layer backend stack
+#endif (METAL5)
+#ifdef MIM
+#define OPTION2 + MiM caps
+#endif (MIM)
+#ifdef REDISTRIBUTION
+#define OPTION3 + redistribution layer
+#endif (REDISTRIBUTION)
+{
+    "foundry" : "SW",
+    "foundry-name" : "SkyWater",
+    "node" : "TECHNAME",
+    "feature-size" : "130nm",
+    "status" : "active",
+    "description" : "DESCRIPTION OPTION1 OPTION2 OPTION3",
+    "options" : [
+#ifdef METAL5
+#undef METAL5
+#ifdef MIM || REDISTRIBUTION
+        "METAL5",
+#else (!(MIM || REDISTRIBUTION))
+        "METAL5"
+#endif (!(MIM || REDISTRIBUTION))
+#endif (METAL5)
+#ifdef MIM
+#undef MIM
+#ifdef REDISTRIBUTION
+        "MIM",
+#else
+        "MIM"
+#endif (REDISTRIBUTION)
+#endif (MIM)
+#ifdef REDISTRIBUTION
+#undef REDISTRIBUTION
+        "REDISTRIBUTION"
+#endif (REDISTRIBUTION)
+    ],
+    "stdcells" : [
+	"sky130_fd_sc_hd",
+	"sky130_fd_sc_hdll",
+	"sky130_fd_sc_hs",
+	"sky130_fd_sc_hvl",
+	"sky130_fd_sc_lp",
+	"sky130_fd_sc_ls",
+	"sky130_fd_sc_ms",
+	"sky130_osu130"
+    ],
+    "iocells" : [
+        "sky130_fd_io"
+    ]
+}
diff --git a/sky130/sky130.lyp b/sky130/sky130.lyp
new file mode 100644
index 0000000..cf7ec0b
--- /dev/null
+++ b/sky130/sky130.lyp
@@ -0,0 +1,8241 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-properties>
+ <properties>
+  <frame-color>#ccccd9</frame-color>
+  <fill-color>#ccccd9</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C7</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>prBoundary.boundary - 235/4</name>
+  <source>235/4@1</source>
+ </properties>
+ <properties>
+  <frame-color>#00ffff</frame-color>
+  <fill-color>#00ffff</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C21</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>pwell.drawing - 64/44</name>
+  <source>64/44@1</source>
+ </properties>
+ <properties>
+  <frame-color>#ffbff2</frame-color>
+  <fill-color>#ffbff2</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C39</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>pwell.pin - 122/16</name>
+  <source>122/16@1</source>
+ </properties>
+ <properties>
+  <frame-color>#9900e6</frame-color>
+  <fill-color>#9900e6</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C1</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>pwell.label - 64/59</name>
+  <source>64/59@1</source>
+ </properties>
+ <properties>
+  <frame-color>#ffbff2</frame-color>
+  <fill-color>#ffbff2</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>I1</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>pwell.res - 64/13</name>
+  <source>64/13@1</source>
+ </properties>
+ <properties>
+  <frame-color>#ffbff2</frame-color>
+  <fill-color>#ffbff2</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C1</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>pwell.cut - 64/14</name>
+  <source>64/14@1</source>
+ </properties>
+ <properties>
+  <frame-color>#ffffff</frame-color>
+  <fill-color>#96c8ff</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C39</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>pwelliso.pin - 44/16</name>
+  <source>44/16@1</source>
+ </properties>
+ <properties>
+  <frame-color>#9900e6</frame-color>
+  <fill-color>#9900e6</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C1</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>pwelliso.label - 44/5</name>
+  <source>44/5@1</source>
+ </properties>
+ <properties>
+  <frame-color>#00cc66</frame-color>
+  <fill-color>#00cc66</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C21</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>nwell.drawing - 64/20</name>
+  <source>64/20@1</source>
+ </properties>
+ <properties>
+  <frame-color>#ff00ff</frame-color>
+  <fill-color>#ff00ff</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C2</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>nwell.net - 84/23</name>
+  <source>84/23@1</source>
+ </properties>
+ <properties>
+  <frame-color>#268c6b</frame-color>
+  <fill-color>#268c6b</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C37</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>nwell.pin - 64/16</name>
+  <source>64/16@1</source>
+ </properties>
+ <properties>
+  <frame-color>#333399</frame-color>
+  <fill-color>#333399</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C1</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>nwell.label - 64/5</name>
+  <source>64/5@1</source>
+ </properties>
+ <properties>
+  <frame-color>#c8ffc8</frame-color>
+  <fill-color>#c8ffc8</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C48</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>dnwell.drawing - 64/18</name>
+  <source>64/18@1</source>
+ </properties>
+ <properties>
+  <frame-color>#00ffff</frame-color>
+  <fill-color>#00ffff</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C6</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>vhvi.drawing - 74/21</name>
+  <source>74/21@1</source>
+ </properties>
+ <properties>
+  <frame-color>#00ff00</frame-color>
+  <fill-color>#00ff00</fill-color>
+  <frame-brightness>0</frame-brightness>
+  <fill-brightness>0</fill-brightness>
+  <dither-pattern>C35</dither-pattern>
+  <line-style>C0</line-style>
+  <valid>true</valid>
+  <visible>true</visible>
+  <transparent>false</transparent>
+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>diff.drawing - 65/20</name>
+  <source>65/20@1</source>
+ </properties>
+ <properties>
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+  <frame-color>#ff0000</frame-color>
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+  <frame-color>#0000ff</frame-color>
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+  <frame-color>#00cc66</frame-color>
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+  <source>74/90@1</source>
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+  <frame-color>#ffffff</frame-color>
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+  <frame-color>#ffff00</frame-color>
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+  <name>rdl.psa5 - 74/92</name>
+  <source>74/92@1</source>
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+  <frame-color>#bf4026</frame-color>
+  <fill-color>#bf4026</fill-color>
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+  <width>1</width>
+  <marked>false</marked>
+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>rdl.psa6 - 74/93</name>
+  <source>74/93@1</source>
+ </properties>
+ <properties>
+  <frame-color>#ffe6bf</frame-color>
+  <fill-color>#ffe6bf</fill-color>
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+  <transparent>false</transparent>
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+  <xfill>false</xfill>
+  <animation>0</animation>
+  <name>blanking.drawing - 124/40</name>
+  <source>124/40@1</source>
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+  <name>blank</name>
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+  <name>solid</name>
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+  <name>dots</name>
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+  <name>hLine</name>
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+  <order>5</order>
+  <name>vLine</name>
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+   <line>.*.*.*.*.*.*.*.*</line>
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+  <name>cross</name>
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+   <line>...*...*...*...*</line>
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+  <name>grid</name>
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+  <order>8</order>
+  <name>slash</name>
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+  <order>9</order>
+  <name>backSlash</name>
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+  <order>10</order>
+  <name>hZigZag</name>
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+  <name>vZigZag</name>
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+  <name>hCurb</name>
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+  <name>vCurb</name>
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+   <line>..*.......*.....</line>
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+  <order>14</order>
+  <name>brick</name>
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+  <name>dagger</name>
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+ <custom-dither-pattern>
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+  <name>sparseDagger</name>
+ </custom-dither-pattern>
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+  <order>17</order>
+  <name>sparseDagger2</name>
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+  <order>18</order>
+  <name>triangle</name>
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+  <name>x</name>
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+  <name>Xone</name>
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+  <order>21</order>
+  <name>Xtwo</name>
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+  </pattern>
+  <order>50</order>
+  <name>hugeSlash2</name>
+ </custom-dither-pattern>
+ <custom-dither-pattern>
+  <pattern>
+   <line>*.........*.....</line>
+   <line>.....*..........</line>
+   <line>..*.........*...</line>
+   <line>.......*........</line>
+   <line>....*.........*.</line>
+   <line>.*.......*......</line>
+   <line>......*.........</line>
+   <line>...*.......*....</line>
+   <line>........*.......</line>
+   <line>.....*.......*..</line>
+   <line>*.........*.....</line>
+   <line>.......*........</line>
+   <line>..*.........*...</line>
+   <line>.........*......</line>
+   <line>....*.........*.</line>
+   <line>...........*....</line>
+  </pattern>
+  <order>51</order>
+  <name>curve</name>
+ </custom-dither-pattern>
+ <custom-dither-pattern>
+  <pattern>
+   <line>....*....*....*.</line>
+   <line>..*.............</line>
+   <line>*.......*.......</line>
+   <line>.............*..</line>
+   <line>.......*........</line>
+   <line>............*...</line>
+   <line>.....*..........</line>
+   <line>...*.......*....</line>
+   <line>*...............</line>
+   <line>................</line>
+   <line>.........*......</line>
+   <line>................</line>
+   <line>......*........*</line>
+   <line>...*............</line>
+   <line>*............*..</line>
+   <line>..........*.....</line>
+  </pattern>
+  <order>52</order>
+  <name>curve2</name>
+ </custom-dither-pattern>
+ <custom-dither-pattern>
+  <pattern>
+   <line>...........*....</line>
+   <line>..........*.*...</line>
+   <line>.........*...*..</line>
+   <line>........*.....*.</line>
+   <line>.........*...*..</line>
+   <line>..........*.*...</line>
+   <line>...........*....</line>
+   <line>................</line>
+   <line>................</line>
+   <line>...*............</line>
+   <line>..*.*...........</line>
+   <line>.*...*..........</line>
+   <line>*.....*.........</line>
+   <line>.*...*..........</line>
+   <line>..*.*...........</line>
+   <line>...*............</line>
+  </pattern>
+  <order>53</order>
+  <name>diams</name>
+ </custom-dither-pattern>
+ <custom-dither-pattern>
+  <pattern>
+   <line>................</line>
+   <line>................</line>
+   <line>................</line>
+   <line>................</line>
+   <line>................</line>
+   <line>................</line>
+   <line>................</line>
+   <line>................</line>
+   <line>................</line>
+   <line>...*............</line>
+   <line>..*.*...........</line>
+   <line>.*...*..........</line>
+   <line>*.....*.........</line>
+   <line>.*...*..........</line>
+   <line>..*.*...........</line>
+   <line>...*............</line>
+  </pattern>
+  <order>54</order>
+  <name>sparsediam</name>
+ </custom-dither-pattern>
+ <custom-dither-pattern>
+  <pattern>
+   <line>.......*.......*</line>
+   <line>......*.........</line>
+   <line>.....*..........</line>
+   <line>................</line>
+   <line>................</line>
+   <line>................</line>
+   <line>.*..............</line>
+   <line>*...............</line>
+   <line>.......*.......*</line>
+   <line>..............*.</line>
+   <line>.............*..</line>
+   <line>................</line>
+   <line>................</line>
+   <line>................</line>
+   <line>.........*......</line>
+   <line>........*.......</line>
+  </pattern>
+  <order>55</order>
+  <name>rain</name>
+ </custom-dither-pattern>
+ <custom-line-style>
+  <pattern>***</pattern>
+  <order>1</order>
+  <name>solid</name>
+ </custom-line-style>
+ <custom-line-style>
+  <pattern>****..</pattern>
+  <order>2</order>
+  <name>dashed</name>
+ </custom-line-style>
+ <custom-line-style>
+  <pattern>*..</pattern>
+  <order>3</order>
+  <name>dots</name>
+ </custom-line-style>
+ <custom-line-style>
+  <pattern>***..*..</pattern>
+  <order>4</order>
+  <name>dashDot</name>
+ </custom-line-style>
+ <custom-line-style>
+  <pattern>**..</pattern>
+  <order>5</order>
+  <name>shortDash</name>
+ </custom-line-style>
+ <custom-line-style>
+  <pattern>****..**..</pattern>
+  <order>6</order>
+  <name>doubleDash</name>
+ </custom-line-style>
+ <custom-line-style>
+  <pattern>*...</pattern>
+  <order>7</order>
+  <name>hidden</name>
+ </custom-line-style>
+ <custom-line-style>
+  <pattern>***</pattern>
+  <order>8</order>
+  <name>thickLine</name>
+ </custom-line-style>
+</layer-properties>
diff --git a/sky130/sky130.lyt b/sky130/sky130.lyt
new file mode 100644
index 0000000..139f6cc
--- /dev/null
+++ b/sky130/sky130.lyt
@@ -0,0 +1,129 @@
+<?xml version="1.0" encoding="utf-8"?>
+<technology>
+ <name>EFS8A</name>
+ <description>EFS8A 5-metals</description>
+ <layer-properties_file>EFS8A.lyp</layer-properties_file>
+ <add-other-layers>true</add-other-layers>
+ <layer-map>
+'66/15 : PY_SHORT	';
+'72/15 : M5_SHORT	';
+'81/14 : LDID	';
+'122/16 :PWELL_PIN	';
+'64/5  : NWELLLABEL	';
+'64/16 : NWELLPT ';
+'64/59 : PWELLLABEL	';
+'64/20 : NWELL	';
+'64/18 : DNWELL ';
+'65/20 : DIFF	';
+'65/44 : TAP	';
+'125/44 : LVTN	';
+'78/44 : HVTP	';
+'75/20 : HVI	';
+'80/20 : TUNM	';
+'66/20 : POLY	';
+'95/20 : NPC	';
+'94/20 : PSDM	';
+'93/44 : NSDM	';
+'66/44 : LICON1 ';
+'67/20 : LI1	';
+'67/16 : LI1T	';
+'67/5  : LI1P	';
+'67/44 : MCON	';
+'68/20 : MET1	';
+'68/16 : MET1T  ';
+'68/5  : MET1P  ';
+'68/44 : VIA1	';
+'69/20 : MET2	';
+'69/16 : MET2T  ';
+'69/5  : MET2P  ';
+'69/44 : VIA2	';
+'70/20 : MET3	';
+'70/16 : MET3T  ';
+'70/5  : MET3P  ';
+'70/44 : VIA3	';
+'71/20 : MET4	';
+'71/16 : MET4T  ';
+'71/5  : MET4P  ';
+'71/44 : VIA4	';
+'72/20 : MET5	';
+'72/16 : MET5T  ';
+'72/5  : MET5P  ';
+'76/20 : PAD	';
+'76/16 : PADT	';
+'76/5  : PADP	';
+'81/4  : BOUND  ';
+'83/44 : TEXT	';
+'18/20 : HVTR	';
+'92/44 : NCM	';
+'86/20 : RPM	';
+'61/20 : NSM	';
+'74/20 : RDL	';
+'74/21 : VHVI	';
+'11/44 : LDNTM  ';
+'125/20 : HVNTM  ';
+'85/44 : PMM	';
+'82/44 : PNP	';
+'82/64 : CAP	';
+'82/24 : IND	';
+'64/13 : PWRES  ';
+'66/13 : POLYRES';
+'65/13 : DIFFRES';
+'81/23 : DIODE  ';
+</layer-map>
+ <create-other-layers>true</create-other-layers>
+ <lef-def-import>
+  <read-all-layers>true</read-all-layers>
+  <layer-map/>
+  <produce-net-names>true</produce-net-names>
+  <net-property-name>#1</net-property-name>
+  <produce-cell-outlines>true</produce-cell-outlines>
+  <cell-outline-layer>OUTLINE</cell-outline-layer>
+  <produce-placement-blockages>true</produce-placement-blockages>
+  <placement-blockage-layer>PLACEMENT_BLK</placement-blockage-layer>
+  <produce-via-geometry>true</produce-via-geometry>
+  <via-geometry-suffix/>
+  <via-geometry-datatype>0</via-geometry-datatype>
+  <produce-pins>true</produce-pins>
+  <pins-suffix>.PIN</pins-suffix>
+  <pins-datatype>2</pins-datatype>
+  <produce-obstructions>true</produce-obstructions>
+  <obstructions-suffix>.OBS</obstructions-suffix>
+  <obstructions-datatype>3</obstructions-datatype>
+  <produce-blockages>true</produce-blockages>
+  <blockages-suffix>.BLK</blockages-suffix>
+  <blockages-datatype>4</blockages-datatype>
+  <produce-labels>true</produce-labels>
+  <labels-suffix>.LABEL</labels-suffix>
+  <labels-datatype>1</labels-datatype>
+  <produce-routing>true</produce-routing>
+  <routing-suffix/>
+  <routing-datatype>0</routing-datatype>
+ </lef-def-import>
+ <connectivity>
+  <connection>LI1,LICON1,SRCDRN</connection>
+  <connection>LI1,LICON1,POLY</connection>
+  <connection>MET1,MCON,LI1</connection>
+  <connection>MET1,VIA1,MET2</connection>
+  <connection>MET2,VIA2,MET3</connection>
+  <connection>MET3,VIA3,MET4</connection>
+  <connection>MET4,VIA4,MET5</connection>
+  <connection>LI1,LICON1,NWP</connection>
+  <symbols>SRCDRN='DIFF-POLY'</symbols>
+  <symbols>PTAP='TAP'</symbols>
+  <symbols>NWP='TAP+NWELL'</symbols>
+  <symbols>DIFF='65/20'</symbols>
+  <symbols>POLY='66/20'</symbols>
+  <symbols>LICON1='66/44'</symbols>
+  <symbols>LI1='67/20'</symbols>
+  <symbols>MCON='67/44'</symbols>
+  <symbols>MET1='68/20'</symbols>
+  <symbols>VIA1='68/44'</symbols>
+  <symbols>MET2='69/20'</symbols>
+  <symbols>VIA2='69/44'</symbols>
+  <symbols>MET3='70/20'</symbols>
+  <symbols>VIA3='70/44'</symbols>
+  <symbols>MET4='71/20'</symbols>
+  <symbols>VIA4='71/44'</symbols>
+  <symbols>MET5='72/20'</symbols>
+ </connectivity>
+</technology>
diff --git a/sky130/sky130.magicrc b/sky130/sky130.magicrc
new file mode 100644
index 0000000..feaf6b5
--- /dev/null
+++ b/sky130/sky130.magicrc
@@ -0,0 +1,114 @@
+###
+###	Source file sky130.magicrc
+###	Process this file with the m4 processor
+###
+puts stdout "Sourcing design .magicrc for technology TECHNAME ..."
+
+# Put grid on 0.005 pitch.  This is important, as some commands don't
+# rescale the grid automatically (such as lef read?).
+
+set scalefac [tech lambda]
+if {[lindex $scalefac 1] < 2} {
+    scalegrid 1 2
+}
+
+# drc off
+drc euclidean on
+
+# Allow override of PDK path from environment variable PDKPATH
+if {[catch {set PDKPATH $env(PDKPATH)}]} {
+    set PDKPATH "STAGING_PATH/TECHNAME"
+}
+
+# loading technology
+#ifdef FULLTECH
+tech load $PDKPATH/MAGIC_CURRENT/TECHNAME-F.tech
+#else
+tech load $PDKPATH/MAGIC_CURRENT/TECHNAME.tech
+#endif
+
+# load device generator
+source $PDKPATH/MAGIC_CURRENT/TECHNAME.tcl
+
+# load bind keys (optional)
+# source $PDKPATH/MAGIC_CURRENT/TECHNAME-BindKeys
+
+# set units to lambda grid 
+snap lambda
+
+# set sky130 standard power, ground, and substrate names
+set VDD VPWR
+set GND VGND
+set SUB VSUBS
+
+# Allow override of type of magic library views used, "mag" or "maglef",
+# from environment variable MAGTYPE
+
+if {[catch {set MAGTYPE $env(MAGTYPE)}]} {
+   set MAGTYPE maglef
+}
+
+# add path to reference cells
+if {[file isdir ${PDKPATH}/libs.ref/${MAGTYPE}]} {
+    addpath ${PDKPATH}/libs.ref/${MAGTYPE}/sky130_fd_pr_base
+    addpath ${PDKPATH}/libs.ref/${MAGTYPE}/sky130_fd_pr_rf
+    addpath ${PDKPATH}/libs.ref/${MAGTYPE}/sky130_fd_pr_rf2
+    addpath ${PDKPATH}/libs.ref/${MAGTYPE}/sky130_fd_io
+    addpath ${PDKPATH}/libs.ref/${MAGTYPE}/sky130_fd_sc_hd
+    addpath ${PDKPATH}/libs.ref/${MAGTYPE}/sky130_fd_sc_hdll
+    addpath ${PDKPATH}/libs.ref/${MAGTYPE}/sky130_fd_sc_hs
+    addpath ${PDKPATH}/libs.ref/${MAGTYPE}/sky130_fd_sc_hvl
+    addpath ${PDKPATH}/libs.ref/${MAGTYPE}/sky130_fd_sc_lp
+    addpath ${PDKPATH}/libs.ref/${MAGTYPE}/sky130_fd_sc_ls
+    addpath ${PDKPATH}/libs.ref/${MAGTYPE}/sky130_fd_sc_ms
+    addpath ${PDKPATH}/libs.ref/${MAGTYPE}/sky130_osu130
+} else {
+    addpath ${PDKPATH}/libs.ref/sky130_fd_pr_base/${MAGTYPE}
+    addpath ${PDKPATH}/libs.ref/sky130_fd_pr_rf/${MAGTYPE}
+    addpath ${PDKPATH}/libs.ref/sky130_fd_pr_rf2/${MAGTYPE}
+    addpath ${PDKPATH}/libs.ref/sky130_fd_io/${MAGTYPE}
+    addpath ${PDKPATH}/libs.ref/sky130_fd_sc_hd/${MAGTYPE}
+    addpath ${PDKPATH}/libs.ref/sky130_fd_sc_hdll/${MAGTYPE}
+    addpath ${PDKPATH}/libs.ref/sky130_fd_sc_hs/${MAGTYPE}
+    addpath ${PDKPATH}/libs.ref/sky130_fd_sc_hvl/${MAGTYPE}
+    addpath ${PDKPATH}/libs.ref/sky130_fd_sc_lp/${MAGTYPE}
+    addpath ${PDKPATH}/libs.ref/sky130_fd_sc_ls/${MAGTYPE}
+    addpath ${PDKPATH}/libs.ref/sky130_fd_sc_ms/${MAGTYPE}
+    addpath ${PDKPATH}/libs.ref/sky130_osu130/${MAGTYPE}
+}
+
+# add path to GDS cells
+#ifdef FULLTECH
+if {[file isdir ${PDKPATH}/libs.ref/gds}]} {
+    path cell ${PDKPATH}/libs.ref/gds/sky130_fd_pr_base
+    path cell ${PDKPATH}/libs.ref/gds/sky130_fd_pr_rf
+    path cell ${PDKPATH}/libs.ref/gds/sky130_fd_pr_rf2
+    path cell +${PDKPATH}/libs.ref/gds/sky130_fd_io
+    path cell +${PDKPATH}/libs.ref/gds/sky130_fd_sc_hd
+    path cell +${PDKPATH}/libs.ref/gds/sky130_fd_sc_hdll
+    path cell +${PDKPATH}/libs.ref/gds/sky130_fd_sc_hs
+    path cell +${PDKPATH}/libs.ref/gds/sky130_fd_sc_hvl
+    path cell +${PDKPATH}/libs.ref/gds/sky130_fd_sc_lp
+    path cell +${PDKPATH}/libs.ref/gds/sky130_fd_sc_ls
+    path cell +${PDKPATH}/libs.ref/gds/sky130_fd_sc_ms
+    path cell +${PDKPATH}/libs.ref/gds/sky130_osu130
+} else {
+    path cell ${PDKPATH}/libs.ref/sky130_fd_pr_base/gds
+    path cell ${PDKPATH}/libs.ref/sky130_fd_pr_rf/gds
+    path cell ${PDKPATH}/libs.ref/sky130_fd_pr_rf2/gds
+    path cell +${PDKPATH}/libs.ref/sky130_fd_io/gds
+    path cell +${PDKPATH}/libs.ref/sky130_fd_sc_hd/gds
+    path cell +${PDKPATH}/libs.ref/sky130_fd_sc_hdll/gds
+    path cell +${PDKPATH}/libs.ref/sky130_fd_sc_hs/gds
+    path cell +${PDKPATH}/libs.ref/sky130_fd_sc_hvl/gds
+    path cell +${PDKPATH}/libs.ref/sky130_fd_sc_lp/gds
+    path cell +${PDKPATH}/libs.ref/sky130_fd_sc_ls/gds
+    path cell +${PDKPATH}/libs.ref/sky130_fd_sc_ms/gds
+    path cell +${PDKPATH}/libs.ref/sky130_osu130/gds
+}
+#endif (FULLTECH)
+
+# add path to IP from catalog.  This procedure defined in the PDK script.
+catch {magic::query_mylib_ip}
+# add path to local IP from user design space.  Defined in the PDK script.
+catch {magic::query_my_projects}
diff --git a/sky130/sky130.par b/sky130/sky130.par
new file mode 100644
index 0000000..afd9190
--- /dev/null
+++ b/sky130/sky130.par
@@ -0,0 +1,108 @@
+# TECHNAME.par --- Parameter file for GrayWolf
+# NOTE:  all distance units are in centimicrons unless otherwise stated
+# WARNING: this is NOT tcl syntax! No Comments on end of actual data line.
+# The vast majority of quantities here are not used (read instead from techLEF, etc.)
+
+RULES
+    # values are resistance in ohms/sq and capacitance in fF/um^2
+    # TODO: properly pick directions
+    layer metal1 0.105 0.0001 horizontal
+    layer metal2 0.105 0.0001 vertical
+    layer metal3 0.105 0.0001 horizontal
+#ifdef METAL5
+    layer metal4 0.105 0.0001 vertical
+    layer metal5 0.105 0.0001 horizontal
+#endif
+
+    via via12 metal1 metal2
+    via via23 metal2 metal3
+#ifdef METAL5
+    via via34 metal3 metal4
+    via via45 metal4 metal5
+#endif
+
+              # 0.5 um
+    width metal1 50
+    width metal2 60
+              # 0.6 um
+    width metal3 60
+#ifdef METAL5
+    width metal4 60
+    width metal5 60
+#endif
+
+    # TODO verify these two numbers
+    width via12 50
+    width via23 50
+#ifdef METAL5
+    width via34 50
+    width via45 50
+#endif
+
+    # Set spacing = track pitch - width, so that GrayWolf places pins
+    # on the right pitch.
+    # Pitches are (in um):
+    # metal1 = 200,  metal2 = 160,  metal3 = 200,  metal4 = 320
+## pitch m1: 1.3um  m2: 1.4um  m3: 1.3um
+## width m1: 0.5um  m2: 0.6um  m3: 0.6um
+## space     0.8        0.8        0.7     (pitch calc)
+## fab-space 0.45       0.5        0.6
+
+    spacing metal1 metal1 80
+    spacing metal2 metal2 80
+    spacing metal3 metal3 80
+#ifdef METAL5
+    spacing metal4 metal4 80
+    spacing metal5 metal5 80
+#endif
+
+    # (WAS:) Stacked vias allowed
+    # spacing via12 via23 0
+
+    # To disable Stacked?: give non-zero spacing (centimicrons = 10 nanometer = 1/100 of micron)
+    # TODO need real value here:
+    spacing via12 via23 0
+#ifdef METAL5
+    spacing via23 via34 0
+    spacing via34 via45 0
+#endif
+
+                       # .2um .15um
+    overhang via12 metal1 20
+    overhang via12 metal2 15
+
+    overhang via23 metal2 20
+    overhang via23 metal3 15
+
+#ifdef METAL5
+    overhang via34 metal3 14
+    overhang via34 metal4 16
+    overhang via45 metal4 14
+    overhang via45 metal5 16
+#endif
+ENDRULES
+
+*vertical_wire_weight : 1.0
+*vertical_path_weight : 1.0
+*padspacing           : variable
+*rowSep		      : 0.0   0
+# min pitch of m1,m2,m3 (FIXME):
+*track.pitch	      : 130
+*graphics.wait        : off
+*last_chance.wait     : off
+*random.seed	      : 12345
+# TODO: proper track.pitch number above, plus feedThruWidth below
+
+TWMC*chip.aspect.ratio : 1.0
+
+# FIXME:  Change width to width of minimum fill cell
+TWSC*feedThruWidth    : 280 layer 1
+TWSC*do.global.route  : on
+TWSC*ignore_feeds     : true
+TWSC*call_row_evener  : true
+TWSC*even_rows_maximally : true
+# TWSC*no.graphics    : on
+
+GENR*row_to_tile_spacing: 1
+# GENR*numrows		: 6
+GENR*flip_alternate_rows : 1
diff --git a/sky130/sky130.sh b/sky130/sky130.sh
new file mode 100644
index 0000000..9d8e6ac
--- /dev/null
+++ b/sky130/sky130.sh
@@ -0,0 +1,93 @@
+#!/bin/tcsh
+#---------------------------------------------------------------
+# Shell script setting up all variables used by the qflow scripts
+# for this project
+#---------------------------------------------------------------
+
+# The LEF file containing standard cell macros
+
+#ifdef EF_FORMAT
+set leffile=STAGING_PATH/TECHNAME/libs.ref/lef/LIBRARY/LIBRARY.lef
+#else (!EF_FORMAT)
+set leffile=STAGING_PATH/TECHNAME/libs.ref/LIBRARY/lef/LIBRARY.lef
+#endif (!EF_FORMAT)
+
+# The SPICE netlist containing subcell definitions for all the standard cells
+#ifdef EF_FORMAT
+set spicefile=STAGING_PATH/TECHNAME/libs.ref/spi/LIBRARY/LIBRARY.spi
+#else (!EF_FORMAT)
+set spicefile=STAGING_PATH/TECHNAME/libs.ref/LIBRARY/spice/LIBRARY.spi
+#endif (!EF_FORMAT)
+
+# The liberty format file containing standard cell timing and function information
+#ifdef EF_FORMAT
+set libertyfile=STAGING_PATH/TECHNAME/libs.ref/lib/LIBRARY/LIBRARY__ff_n40C_1v95.lib
+#else (!EF_FORMAT)
+set libertyfile=STAGING_PATH/TECHNAME/libs.ref/LIBRARY/lib/LIBRARY__ff_n40C_1v95.lib
+#endif (!EF_FORMAT)
+
+# If there is another LEF file containing technology information
+# that is separate from the file containing standard cell macros,
+# set this.  Otherwise, leave it defined as an empty string.
+
+#ifdef METAL5
+#ifdef EF_FORMAT
+set techleffile=STAGING_PATH/TECHNAME/libs.ref/techLEF/LIBRARY/LIBRARY_tech.lef
+#else (!EF_FORMAT)
+set techleffile=STAGING_PATH/TECHNAME/libs.ref/LIBRARY/techlef/LIBRARY_tech.lef
+#endif (!EF_FORMAT)
+#else
+# NOTE:  There is no technology LEF file for the 3-metal stack!
+#endif
+
+# All cells below should be the lowest output drive strength value,
+# if the standard cell set has multiple cells with different drive
+# strengths.  Comment out any cells that do not exist.
+
+set bufcell=LIBRARY__buf_1	;# Minimum drive strength buffer cell
+set bufpin_in=A			;# Name of input port to buffer cell
+set bufpin_out=X		;# Name of output port to buffer cell
+set clkbufcell=LIBRARY__clkbuf_1	;# Minimum drive strength buffer cell
+set clkbufpin_in=A		;# Name of input port to buffer cell
+set clkbufpin_out=X		;# Name of output port to buffer cell
+
+set fillcell=LIBRARY__fill_	;# Spacer (filler) cell (prefix, if more than one)
+set decapcell=LIBRARY__decap_	;# Decap (filler) cell (prefix, if more than one)
+set antennacell=LIBRARY__diode_	;# Antenna (filler) cell (prefix, if more than one)
+set antennapin_in=vpb		;# Antenna cell input connection
+set bodytiecell=LIBRARY__tapvpwrvgnd_	;# Body tie (filler) cell (prefix, if more than one)
+
+# yosys tries to eliminate use of these; depends on source .v
+set tiehi="LIBRARY__conb_1"	;# Cell to connect to power, if one exists
+set tiehipin_out="HI"		;# Output pin name of tiehi cell, if it exists
+set tielo="LIBRARY__conb_1"	;# Cell to connect to ground, if one exists
+set tielopin_out="LO"		;# Output pin name of tielo cell, if it exists
+
+set gndnet="vgnd,vnb"		;# Name used for ground pins and taps in standard cells
+set vddnet="vpwr,vpb"		;# Name used for power pins and taps in standard cells
+
+set separator=""		;# Separator between gate names and drive strengths
+set techfile=STAGING_PATH/TECHNAME/MAGIC_CURRENT/TECHNAME.tech	;# magic techfile
+set magicrc=STAGING_PATH/TECHNAME/MAGIC_CURRENT/TECHNAME.magicrc	;# magic startup script
+set magic_display="XR" 	;# magic display, defeat display query and OGL preference
+set netgen_setup=STAGING_PATH/TECHNAME/libs.tech/netgen/TECHNAME_setup.tcl	;# netgen setup file for LVS
+#ifdef EF_FORMAT
+set gdsfile=STAGING_PATH/TECHNAME/libs.ref/gds/LIBRARY/LIBRARY.gds	;# GDS database of standard cells
+set verilogfile=STAGING_PATH/TECHNAME/libs.ref/verilog/LIBRARY/LIBRARY.v	;# Verilog models of standard cells
+#else (!EF_FORMAT)
+set gdsfile=STAGING_PATH/TECHNAME/libs.ref/LIBRARY/gds/LIBRARY.gds	;# GDS database of standard cells
+set verilogfile=STAGING_PATH/TECHNAME/libs.ref/LIBRARY/verilog/LIBRARY.v	;# Verilog models of standard cells
+#endif (!EF_FORMAT)
+
+# Set a conditional default in the project_vars.sh file for this process
+set postproc_options="-anchors"
+#ifdef METAL5
+# Normally one does not want to use the top metal for signal routing
+set route_layers = 5
+#else
+set route_layers = 3
+#endif
+set fill_ratios="0,70,10,20"
+set fanout_options="-l 200 -c 20"
+set addspacers_options="-stripe 2.5 50.0 PG"
+set xspice_options="-io_time=500p -time=50p -idelay=5p -odelay=50p -cload=250f"
diff --git a/sky130/sky130.tcl b/sky130/sky130.tcl
new file mode 100644
index 0000000..684aee5
--- /dev/null
+++ b/sky130/sky130.tcl
@@ -0,0 +1,5596 @@
+###
+###     Source file sky130.tcl
+###     Process this file with the preprocessor script
+###
+#-----------------------------------------------------
+# Magic/TCL design kit for SKYWATER TECHNAME
+#-----------------------------------------------------
+# Tim Edwards
+# Revision 0	PRE-ALPHA   3/21/2019
+#-----------------------------------------------------
+
+set TECHPATH STAGING_PATH
+if [catch {set PDKPATH}] {set PDKPATH ${TECHPATH}/TECHNAME}
+set PDKNAME TECHNAME
+# "sky130" is the namespace used for all devices
+set PDKNAMESPACE sky130
+puts stdout "Loading TECHNAME Device Generator Menu ..."
+
+# Initialize toolkit menus to the wrapper window
+
+global Opts
+namespace eval sky130 {}
+
+# Set the window callback
+if [catch {set Opts(callback)}] {set Opts(callback) ""}
+set Opts(callback) [subst {sky130::addtechmenu \$framename; $Opts(callback)}]
+
+# if {![info exists Opts(cmdentry)]} {set Opts(cmdentry) 1}
+
+# Set options specific to this PDK
+set Opts(hidelocked) 1
+set Opts(hidespecial) 1
+
+# Create new "tool" proc that doesn't have the netlist tool.
+proc magic::nexttool {} {
+   global Opts
+
+   # Don't attempt to switch tools while a selection drag is active
+   if {$Opts(motion) == {}} {
+      switch $Opts(tool) {
+         box { magic::tool wiring }
+         wiring { magic::tool pick }
+         default { magic::tool box }
+      }
+   }
+}
+
+# This shoule be part of sitedef. . .
+macro space magic::nexttool
+
+# Wrap the closewrapper procedure so that closing the last
+# window is equivalent to quitting.
+if {[info commands closewrapper] == "closewrapper"} {
+   rename closewrapper closewrapperonly
+   proc closewrapper { framename } {
+      if {[llength [windownames all]] <= 1} {
+         magic::quit
+      } else {
+         closewrapperonly $framename
+      }
+   }
+}
+
+# Remove maze router layers from the toolbar by locking them
+tech lock fence,magnet,rotate
+
+namespace eval sky130 {
+    namespace path {::tcl::mathop ::tcl::mathfunc}
+
+    set ruleset [dict create]
+
+    # Process DRC rules (magic style)
+
+    dict set ruleset poly_surround    0.08      ;# Poly surrounds contact
+    dict set ruleset diff_surround    0.06      ;# Diffusion surrounds contact
+    dict set ruleset gate_to_diffcont 0.145     ;# Gate to diffusion contact center
+    dict set ruleset gate_to_polycont 0.275     ;# Gate to poly contact center
+    dict set ruleset gate_extension   0.13      ;# Poly extension beyond gate
+    dict set ruleset diff_extension   0.29      ;# Diffusion extension beyond gate
+    dict set ruleset contact_size     0.17      ;# Minimum contact size
+    dict set ruleset via_size         0.17      ;# Minimum via size
+    dict set ruleset metal_surround   0.08      ;# Local interconnect overlaps contact
+    dict set ruleset sub_surround     0.18      ;# Sub/well surrounds diffusion
+    dict set ruleset diff_spacing     0.28      ;# Diffusion spacing rule
+    dict set ruleset poly_spacing     0.21      ;# Poly spacing rule
+    dict set ruleset diff_poly_space  0.075     ;# Diffusion to poly spacing rule
+    dict set ruleset diff_gate_space  0.20      ;# Diffusion to gate poly spacing rule
+    dict set ruleset metal_spacing    0.23      ;# Local interconnect spacing rule
+    dict set ruleset mmetal_spacing   0.14      ;# Metal spacing rule (above local interconnect)
+    dict set ruleset res_to_cont      0.20      ;# resistor to contact center
+    dict set ruleset res_diff_space   0.20      ;# resistor to guard ring
+}
+
+#-----------------------------------------------------
+# magic::addtechmenu
+#-----------------------------------------------------
+
+proc sky130::addtechmenu {framename} {
+   global Winopts Opts
+   
+   # Check for difference between magic 8.1.125 and earlier, and 8.1.126 and later
+   if {[catch {${framename}.titlebar cget -height}]} {
+      set layoutframe ${framename}.pane.top
+   } else {
+      set layoutframe ${framename}
+   }
+
+   # List of devices is long.  Divide into two sections for active and passive deivces
+   magic::add_toolkit_menu $layoutframe "Devices 1" pdk1
+
+   magic::add_toolkit_command $layoutframe "nmos (MOSFET)" \
+	    "magic::gencell sky130::nshort" pdk1
+   magic::add_toolkit_command $layoutframe "pmos (MOSFET)" \
+	    "magic::gencell sky130::pshort" pdk1
+
+   magic::add_toolkit_separator	$layoutframe pdk1
+   magic::add_toolkit_command $layoutframe "n-diode" \
+	    "magic::gencell sky130::ndiode" pdk1
+   magic::add_toolkit_command $layoutframe "p-diode" \
+	    "magic::gencell sky130::pdiode" pdk1
+
+   magic::add_toolkit_separator	$layoutframe pdk1
+   magic::add_toolkit_command $layoutframe "MOS varactor" \
+	    "magic::gencell sky130::xcnwvc" pdk1
+   magic::add_toolkit_separator	$layoutframe pdk1
+
+   magic::add_toolkit_command $layoutframe "NPN 1x1" \
+	    "magic::gencell sky130::sky130_fd_pr_rf_npn_1x1" pdk1
+   magic::add_toolkit_command $layoutframe "NPN 1x2" \
+	    "magic::gencell sky130::sky130_fd_pr_rf_npn_1x2" pdk1
+   magic::add_toolkit_command $layoutframe "PNP 5x" \
+	    "magic::gencell sky130::sky130_fd_pr_rf_pnp5x" pdk1
+
+   magic::add_toolkit_separator	$layoutframe pdk1
+
+   magic::add_toolkit_command $layoutframe "balun" \
+	    "magic::gencell sky130::balun" pdk1
+   magic::add_toolkit_command $layoutframe "inductor 011" \
+	    "magic::gencell sky130::xind4_011" pdk1
+   magic::add_toolkit_command $layoutframe "inductor 02" \
+	    "magic::gencell sky130::xind4_02" pdk1
+
+   magic::add_toolkit_separator	$layoutframe pdk1
+
+   magic::add_toolkit_command $layoutframe "substrate contact (1.8V)" \
+	    "sky130::subconn_draw" pdk1
+   magic::add_toolkit_command $layoutframe "substrate contact (5.0V)" \
+	    "sky130::mvsubconn_draw" pdk1
+   magic::add_toolkit_command $layoutframe "deep n-well region" \
+	    "sky130::deep_nwell_draw" pdk1
+   magic::add_toolkit_command $layoutframe "mcon" \
+	    "sky130::mcon_draw" pdk1
+   magic::add_toolkit_command $layoutframe "via1" \
+	    "sky130::via1_draw" pdk1
+   magic::add_toolkit_command $layoutframe "via2" \
+	    "sky130::via2_draw" pdk1
+#ifdef METAL5
+   magic::add_toolkit_command $layoutframe "via3" \
+	    "sky130::via3_draw" pdk1
+   magic::add_toolkit_command $layoutframe "via4" \
+	    "sky130::via4_draw" pdk1
+#endif (METAL5)
+   
+
+   magic::add_toolkit_menu $layoutframe "Devices 2" pdk2
+
+   magic::add_toolkit_command $layoutframe "mrdn (1.8V) - 120 Ohm/sq" \
+	    "magic::gencell sky130::mrdn" pdk2
+   magic::add_toolkit_command $layoutframe "mrdp (1.8V) - 197 Ohm/sq" \
+	    "magic::gencell sky130::mrdp" pdk2
+   magic::add_toolkit_command $layoutframe "mrdn_hv (5.0V) - 114 Ohm/sq" \
+	    "magic::gencell sky130::mrdn_hv" pdk2
+   magic::add_toolkit_command $layoutframe "mrdp_hv (5.0V) - 191 Ohm/sq" \
+	    "magic::gencell sky130::mrdp_hv" pdk2
+
+   magic::add_toolkit_command $layoutframe "mrp1 - 48.2 Ohm/sq" \
+	    "magic::gencell sky130::mrp1" pdk2
+   magic::add_toolkit_command $layoutframe "xhrpoly - 319.8 Ohm/sq" \
+	    "magic::gencell sky130::xhrpoly" pdk2
+   magic::add_toolkit_command $layoutframe "uhrpoly - 2000 Ohm/sq" \
+	    "magic::gencell sky130::uhrpoly" pdk2
+   magic::add_toolkit_command $layoutframe "xpwres - 3050 Ohm/sq" \
+	    "magic::gencell sky130::xpwres" pdk2
+   magic::add_toolkit_separator	$layoutframe pdk2
+
+   magic::add_toolkit_command $layoutframe "mrl1 - 12.2 Ohm/sq" \
+	    "magic::gencell sky130::mrl1" pdk2
+   magic::add_toolkit_command $layoutframe "mrm1 - 125 mOhm/sq" \
+	    "magic::gencell sky130::mrm1" pdk2
+   magic::add_toolkit_command $layoutframe "mrm2 - 125 mOhm/sq" \
+	    "magic::gencell sky130::mrm2" pdk2
+   magic::add_toolkit_command $layoutframe "mrm3 - 47 mOhm/sq" \
+	    "magic::gencell sky130::mrm3" pdk2
+#ifdef METAL5
+   magic::add_toolkit_command $layoutframe "mrm4 - 47 mOhm/sq" \
+	    "magic::gencell sky130::mrm4" pdk2
+   magic::add_toolkit_command $layoutframe "mrm5 - 29 mOhm/sq" \
+	    "magic::gencell sky130::mrm5" pdk2
+#endif (METAL5)
+
+#ifdef MIM
+   magic::add_toolkit_command $layoutframe "xcmimc1 - 1fF/um^2 MiM cap" \
+	    "magic::gencell sky130::xcmimc1" pdk2
+   magic::add_toolkit_command $layoutframe "xcmimc2 - 1fF/um^2 MiM cap" \
+	    "magic::gencell sky130::xcmimc2" pdk2
+#endif (MIM)
+   magic::add_toolkit_separator	$layoutframe pdk2
+
+   magic::add_toolkit_command $layoutframe "vpp 11.5x11.7 li/m5 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_lim5shield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 11.5x11.7 li/m3/m5 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_m3_lim5shield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 11.5x11.7 m4 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_m4shield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 11.5x11.7 p/m4 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym4shield" pdk2
+   # magic::add_toolkit_command $layoutframe "vpp 11.5x11.7 p/m5 shield" \
+   #	    "magic::gencell sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym50p4shield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 4.4x4.6 li/m3/m5 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf2_xcmvpp4p4x4p6_m3_lim5shield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 6.8x6.1 li/m4 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf2_xcmvpp6p8x6p1_lim4shield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 6.8x6.1 p/m4 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf2_xcmvpp6p8x6p1_polym4shield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 8.6x7.9 li/m3/m5 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf2_xcmvpp8p6x7p9_m3_lim5shield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 4.2x2 nhvnat" \
+	    "magic::gencell sky130::sky130_fd_pr_rf2_xcmvppx4_2xnhvnative10x4" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 11.5x11.7 li/m3 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf_xcmvpp11p5x11p7_m3_lishield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 11.5x11.7 m3 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf_xcmvpp11p5x11p7_m3shield" pdk2
+   # magic::add_toolkit_command $layoutframe "vpp 1.8x1.8 li shield" \
+   #	    "magic::gencell sky130::sky130_fd_pr_rf_xcmvpp1p8x1p8_lishield" pdk2
+   # magic::add_toolkit_command $layoutframe "vpp 1.8x1.8 m3 shield" \
+   #	    "magic::gencell sky130::sky130_fd_pr_rf_xcmvpp1p8x1p8_m3shield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 4.4x4.6 li/m3 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf_xcmvpp4p4x4p6_m3_lishield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 4.4x4.6 m3 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf_xcmvpp4p4x4p6_m3shield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 8.6x7.9 li/m3 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf_xcmvpp8p6x7p9_m3_lishield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp 8.6x7.9 m3 shield" \
+	    "magic::gencell sky130::sky130_fd_pr_rf_xcmvpp8p6x7p9_m3shield" pdk2
+   magic::add_toolkit_command $layoutframe "vpp2" \
+	    "magic::gencell sky130::sky130_fd_pr_rf_xcmvpp2" pdk2
+   magic::add_toolkit_command $layoutframe "vpp2 nwell" \
+	    "magic::gencell sky130::sky130_fd_pr_rf_xcmvpp2_nwell" pdk2
+
+   ${layoutframe}.titlebar.mbuttons.drc.toolmenu add command -label "DRC Routing" -command {drc style drc(routing)}
+
+   # Add command entry window by default if enabled
+   if {[info exists Opts(cmdentry)]} {
+      set Winopts(${framename},cmdentry) $Opts(cmdentry)
+   } else {
+      set Winopts(${framename},cmdentry) 0
+   }
+   if {$Winopts(${framename},cmdentry) == 1} {
+      addcommandentry $framename
+   }
+}
+
+#----------------------------------------------------------------
+
+proc sky130::mcon_draw {} {
+   set w [magic::i2u [box width]]
+   set h [magic::i2u [box height]]
+   if {$w < 0.17} {
+      puts stderr "Mcon width must be at least 0.17um"
+      return
+   }
+   if {$h < 0.17} {
+      puts stderr "Mcon height must be at least 0.17um"
+      return
+   }
+   paint lic
+   box grow n 0.05um
+   box grow s 0.05um
+   paint m1
+   box grow n -0.05um
+   box grow s -0.05um
+   box grow e 0.05um
+   box grow w 0.05um
+   paint li
+   box grow e -0.05um
+   box grow w -0.05um
+}
+
+proc sky130::via1_draw {} {
+   set w [magic::i2u [box width]]
+   set h [magic::i2u [box height]]
+   if {$w < 0.26} {
+      puts stderr "Via1 width must be at least 0.26um"
+      return
+   }
+   if {$h < 0.26} {
+      puts stderr "Via1 height must be at least 0.26um"
+      return
+   }
+   paint via1
+   box grow n 0.05um
+   box grow s 0.05um
+   paint m2
+   box grow n -0.05um
+   box grow s -0.05um
+   box grow e 0.05um
+   box grow w 0.05um
+   paint m1
+   box grow e -0.05um
+   box grow w -0.05um
+}
+
+proc sky130::via2_draw {} {
+   set w [magic::i2u [box width]]
+   set h [magic::i2u [box height]]
+   if {$w < 0.28} {
+      puts stderr "Via2 width must be at least 0.28um"
+      return
+   }
+   if {$h < 0.28} {
+      puts stderr "Via2 height must be at least 0.28um"
+      return
+   }
+   paint via2
+   box grow n 0.05um
+   box grow s 0.05um
+   paint m2
+   box grow n -0.05um
+   box grow s -0.05um
+   box grow e 0.05um
+   box grow w 0.05um
+   paint m3
+   box grow e -0.05um
+   box grow w -0.05um
+}
+
+#ifdef METAL5
+proc sky130::via3_draw {} {
+   set w [magic::i2u [box width]]
+   set h [magic::i2u [box height]]
+   if {$w < 0.32} {
+      puts stderr "Via3 width must be at least 0.32um"
+      return
+   }
+   if {$h < 0.32} {
+      puts stderr "Via3 height must be at least 0.32um"
+      return
+   }
+   paint via3
+   box grow n 0.05um
+   box grow s 0.05um
+   paint m4
+   box grow n -0.05um
+   box grow s -0.05um
+   box grow e 0.05um
+   box grow w 0.05um
+   paint m3
+   box grow e -0.05um
+   box grow w -0.05um
+}
+
+proc sky130::via4_draw {} {
+   set w [magic::i2u [box width]]
+   set h [magic::i2u [box height]]
+   if {$w < 1.18} {
+      puts stderr "Via3 width must be at least 1.18um"
+      return
+   }
+   if {$h < 1.18} {
+      puts stderr "Via3 height must be at least 1.18um"
+      return
+   }
+   paint via4
+   box grow n 0.05um
+   box grow s 0.05um
+   paint m5
+   box grow n -0.05um
+   box grow s -0.05um
+   box grow e 0.05um
+   box grow w 0.05um
+   paint m4
+   box grow e -0.05um
+   box grow w -0.05um
+}
+#endif (METAL5)
+
+proc sky130::subconn_draw {} {
+   set w [magic::i2u [box width]]
+   set h [magic::i2u [box height]]
+   if {$w < 0.17} {
+      puts stderr "Substrate tap width must be at least 0.17um"
+      return
+   }
+   if {$h < 0.17} {
+      puts stderr "Substrate tap height must be at least 0.17um"
+      return
+   }
+   paint nsc
+   box grow c 0.1um
+   paint nsd
+   box grow c -0.1um
+}
+
+#----------------------------------------------------------------
+
+proc sky130::mvsubconn_draw {} {
+   set w [magic::i2u [box width]]
+   set h [magic::i2u [box height]]
+   if {$w < 0.17} {
+      puts stderr "Substrate tap width must be at least 0.17um"
+      return
+   }
+   if {$h < 0.17} {
+      puts stderr "Substrate tap height must be at least 0.17um"
+      return
+   }
+   paint mvnsc
+   box grow c 0.1um
+   paint mvnsd
+   box grow c -0.1um
+}
+
+#----------------------------------------------------------------
+
+proc sky130::deep_nwell_draw {} {
+   set w [magic::i2u [box width]]
+   set h [magic::i2u [box height]]
+   if {$w < 3.0} {
+      puts stderr "Deep-nwell region width must be at least 3.0um"
+      return
+   }
+   if {$h < 3.0} {
+      puts stderr "Deep-nwell region height must be at least 3.0um"
+      return
+   }
+   suspendall
+   tech unlock *
+   paint dnwell
+   pushbox
+   pushbox
+   box grow c 0.4um
+   paint nwell
+   box grow c -1.43um
+   erase nwell
+   popbox
+   box grow c 0.03um
+
+   pushbox
+   box width 0
+   box grow c 0.085um
+   paint li
+   pushbox
+   box grow n -0.3um
+   box grow s -0.3um
+   paint nsc
+   popbox
+   box grow c 0.1um
+   paint nsd
+   popbox
+
+   pushbox
+   box height 0
+   box grow c 0.085um
+   paint li
+   pushbox
+   box grow e -0.3um
+   box grow w -0.3um
+   paint nsc
+   popbox
+   box grow c 0.1um
+   paint nsd
+   popbox
+
+   pushbox
+   box move n [box height]i
+   box height 0
+   box grow c 0.085um
+   paint li
+   pushbox
+   box grow e -0.3um
+   box grow w -0.3um
+   paint nsc
+   popbox
+   box grow c 0.1um
+   paint nsd
+   popbox
+
+   pushbox
+   box move e [box width]i
+   box width 0
+   box grow c 0.085um
+   paint li
+   pushbox
+   box grow n -0.3um
+   box grow s -0.3um
+   paint nsc
+   box grow c 0.1um
+   paint nsd
+   popbox
+
+   popbox
+   tech revert
+   resumeall
+}
+
+#----------------------------------------------------------------
+
+proc sky130::res_recalc {field parameters} {
+    set snake 0
+    set sterm 0.0
+    set caplen 0
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+    set val [magic::spice2float $val]
+    set l [magic::spice2float $l]
+    set w [magic::spice2float $w]
+
+    if {$snake == 0} {
+	# Straight resistor calculation
+	switch  $field {
+	    val { set l [expr ($val * ($w - $dw) - (2 * $term)) / $rho]
+		  set w [expr ((2 * $term + $l * $rho) / $val) + $dw]
+		}
+	    w   { set val [expr (2 * $term + $l * $rho) / ($w - $dw)]
+		  set l [expr ($val * ($w - $dw) - (2 * $term)) / $rho]
+		}
+	    l   { set val [expr (2 * $term + $l * $rho) / ($w - $dw)]
+		  set w [expr ((2 * $term + $l * $rho) / $val) + $dw]
+		}
+	}
+    } else {
+        set term [expr $term + $sterm]
+	# Snake resistor calculation
+	switch  $field {
+	    val { set l [expr (($val - $rho * ($nx - 1)) * ($w - $dw) \
+			- (2 * $term) - ($rho * $caplen * ($nx - 1))) \
+			/ ($rho * $nx)]
+
+		  set w [expr ((2 * $term + $l * $rho * $nx \
+			+ $caplen * $rho * ($nx - 1)) \
+			/ ($val - $rho * ($nx - 1))) + $dw]
+		}
+	    w   { set val [expr $rho * ($nx - 1) + ((2 * $term) \
+			+ ($rho * $l * $nx) + ($rho * $caplen * ($nx - 1))) \
+			/ ($w - $dw)]
+
+		  set l [expr (($val - $rho * ($nx - 1)) * ($w - $dw) \
+			- (2 * $term) - ($rho * $caplen * ($nx - 1))) \
+			/ ($rho * $nx)]
+		}
+	    l   { set val [expr $rho * ($nx - 1) + ((2 * $term) \
+			+ ($rho * $l * $nx) + ($rho * $caplen * ($nx - 1))) \
+			/ ($w - $dw)]
+
+		  set w [expr ((2 * $term + $l * $rho * $nx \
+			+ $caplen * $rho * ($nx - 1)) \
+			/ ($val - $rho * ($nx - 1))) + $dw]
+		}
+	}
+    }
+
+    set val [magic::3digitpastdecimal $val]
+    set w [magic::3digitpastdecimal $w]
+    set l [magic::3digitpastdecimal $l]
+
+    dict set parameters val $val
+    dict set parameters w $w
+    dict set parameters l $l
+
+    return $parameters
+}
+
+#----------------------------------------------------------------
+# Drawn diode routines
+#----------------------------------------------------------------
+
+proc sky130::diode_recalc {field parameters} {
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+    switch  $field {
+	area { puts stdout "area changed" }
+	peri { puts stdout "perimeter changed" }
+	w   { puts stdout "width changed" }
+	l   { puts stdout "length changed" }
+    }
+    dict set parameters area $area
+    dict set parameters peri $peri
+    dict set parameters w $w
+    dict set parameters l $l
+}
+
+#----------------------------------------------------------------
+# diode: Conversion from SPICE netlist parameters to toolkit
+#----------------------------------------------------------------
+
+proc sky130::diode_convert {parameters} {
+    set pdkparams [dict create]
+    dict for {key value} $parameters {
+	switch -nocase $key {
+	    l -
+	    w -
+	    peri {
+		# Length, width, and perimeter are converted to units of microns
+		set value [magic::spice2float $value]
+		# set value [expr $value * 1e6]
+		set value [magic::3digitpastdecimal $value]
+		dict set pdkparams [string tolower $key] $value
+	    }
+	    area {
+		# area also converted to units of microns
+		set value [magic::spice2float $value]
+		# set value [expr $value * 1e12]
+		set value [magic::3digitpastdecimal $value]
+		dict set pdkparams [string tolower $key] $value
+	    }
+	    m {
+                # Convert m to ny
+		dict set pdkparams ny $value
+	    }
+	}
+    }
+    return $pdkparams
+}
+
+#----------------------------------------------------------------
+# diode: Interactively specifies the fixed layout parameters
+#----------------------------------------------------------------
+
+proc sky130::diode_dialog {device parameters} {
+    # Editable fields:      w, l, area, perim, nx, ny
+
+    magic::add_entry area "Area (um^2)" $parameters
+    magic::add_entry peri "Perimeter (um)" $parameters
+    sky130::compute_aptot $parameters
+    magic::add_message atot "Total area (um^2)" $parameters
+    magic::add_message ptot "Total perimeter (um)" $parameters
+    magic::add_entry l "Length (um)" $parameters
+    magic::add_entry w "Width (um)" $parameters
+    magic::add_entry nx "X Repeat" $parameters
+    magic::add_entry ny "Y Repeat" $parameters
+
+    if {[dict exists $parameters compatible]} {
+       set sellist [dict get $parameters compatible]
+       magic::add_selectlist gencell "Device type" $sellist $parameters $device
+    }
+
+    if {[dict exists $parameters doverlap]} {
+	magic::add_checkbox doverlap "Overlap at end contact" $parameters
+    }
+    if {[dict exists $parameters elc]} {
+        magic::add_checkbox elc "Add left end contact" $parameters
+    }
+    if {[dict exists $parameters erc]} {
+        magic::add_checkbox erc "Add right end contact" $parameters
+    }
+    if {[dict exists $parameters etc]} {
+        magic::add_checkbox etc "Add top end contact" $parameters
+    }
+    if {[dict exists $parameters ebc]} {
+        magic::add_checkbox ebc "Add bottom end contact" $parameters
+    }
+
+    if {[dict exists $parameters guard]} {
+        magic::add_checkbox full_metal "Full metal guard ring" $parameters
+    }
+    if {[dict exists $parameters glc]} {
+        magic::add_checkbox glc "Add left guard ring contact" $parameters
+    }
+    if {[dict exists $parameters grc]} {
+        magic::add_checkbox grc "Add right guard ring contact" $parameters
+    }
+    if {[dict exists $parameters gtc]} {
+        magic::add_checkbox gtc "Add top guard ring contact" $parameters
+    }
+    if {[dict exists $parameters gbc]} {
+        magic::add_checkbox gbc "Add bottom guard ring contact" $parameters
+    }
+
+    magic::add_dependency sky130::diode_recalc $device sky130 l w area peri
+
+    # magic::add_checkbox dummy "Add dummy" $parameters
+}
+
+#----------------------------------------------------------------
+# Diode total area and perimeter computation
+#----------------------------------------------------------------
+
+proc sky130::compute_aptot {parameters} {
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+    set area [magic::spice2float $area]
+    set area [magic::3digitpastdecimal $area]
+    set peri [magic::spice2float $peri]
+    set peri [magic::3digitpastdecimal $peri]
+
+    # Compute total area
+    catch {set magic::atot_val [expr ($area * $nx * $ny)]}
+    # Compute total perimeter
+    catch {set magic::ptot_val [expr ($peri * $nx * $ny)]}
+}
+
+#----------------------------------------------------------------
+# diode: Check device parameters for out-of-bounds values
+#----------------------------------------------------------------
+
+proc sky130::diode_check {parameters} {
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # Normalize distance units to microns
+    set l [magic::spice2float $l]
+    set l [magic::3digitpastdecimal $l] 
+    set w [magic::spice2float $w]
+    set w [magic::3digitpastdecimal $w] 
+
+    set area [magic::spice2float $area]
+    set area [magic::3digitpastdecimal $area] 
+    set peri [magic::spice2float $peri]
+    set peri [magic::3digitpastdecimal $peri] 
+
+    if {$l == 0} {
+        # Calculate L from W and area
+	set l [expr ($area / $w)]
+	dict set parameters l [magic::float2spice $l]
+    } elseif {$w == 0} {
+        # Calculate W from L and area
+	set w [expr ($area / $l)]
+	dict set parameters w [magic::float2spice $w]
+    }
+    if {$w < $wmin} {
+	puts stderr "Diode width must be >= $wmin"
+	dict set parameters w $wmin
+    } 
+    if {$l < $lmin} {
+	puts stderr "Diode length must be >= $lmin"
+	dict set parameters l $lmin
+    } 
+    # Calculate area and perimeter from L and W
+    set area [expr ($l * $w)]
+    dict set parameters area [magic::float2spice $area]
+    set peri [expr (2 * ($l + $w))]
+    dict set parameters peri [magic::float2spice $peri]
+    sky130::compute_aptot $parameters
+
+    return $parameters
+}
+
+#------------------------------------------------------------------
+# NOTE:  ndiode_lvt, ndiode_native, pdiode_lvt, and pdiode_hvt are
+# all considered parasitic diodes.  They may be generated by
+# invoking the build procedure on the command line.  To enable them
+# in the PDK, add them to the appropriate compatible {} list.
+#------------------------------------------------------------------
+
+proc sky130::ndiode_defaults {} {
+    return {w 0.45 l 0.45 area 0.2025 peri 1.8 \
+	nx 1 ny 1 dummy 0 lmin 0.45 wmin 0.45 \
+	elc 1 erc 1 etc 1 ebc 1 doverlap 0 \
+	compatible {ndiode ndiode_h} full_metal 1}
+}
+
+proc sky130::ndiode_lvt_defaults {} {
+    return {w 0.45 l 0.45 area 0.2025 peri 1.8 \
+	nx 1 ny 1 dummy 0 lmin 0.45 wmin 0.45 \
+	elc 1 erc 1 etc 1 ebc 1 doverlap 0 \
+	full_metal 1}
+}
+
+proc sky130::pdiode_defaults {} {
+    return {w 0.45 l 0.45 area 0.2025 peri 1.8 \
+	nx 1 ny 1 dummy 0 lmin 0.45 wmin 0.45 \
+	elc 1 erc 1 etc 1 ebc 1 \
+	glc 1 grc 1 gtc 1 gbc 1 doverlap 0 \
+	compatible {pdiode pdiode_h} full_metal 1}
+}
+
+proc sky130::pdiode_lvt_defaults {} {
+    return {w 0.45 l 0.45 area 0.2025 peri 1.8 \
+	nx 1 ny 1 dummy 0 lmin 0.45 wmin 0.45 \
+	elc 1 erc 1 etc 1 ebc 1 \
+	glc 1 grc 1 gtc 1 gbc 1 doverlap 0 \
+	full_metal 1}
+}
+
+proc sky130::pdiode_hvt_defaults {} {
+    return {w 0.45 l 0.45 area 0.2025 peri 1.8 \
+	nx 1 ny 1 dummy 0 lmin 0.45 wmin 0.45 \
+	elc 1 erc 1 etc 1 ebc 1 \
+	glc 1 grc 1 gtc 1 gbc 1 doverlap 0 \
+	full_metal 1}
+}
+
+proc sky130::ndiode_h_defaults {} {
+    return {w 0.45 l 0.45 area 0.2024 peri 1.8 \
+	nx 1 ny 1 dummy 0 lmin 0.45 wmin 0.45 \
+	elc 1 erc 1 etc 1 ebc 1 doverlap 0 \
+	compatible {ndiode ndiode_h} full_metal 1}
+}
+
+proc sky130::ndiode_native_defaults {} {
+    return {w 0.45 l 0.45 area 0.2024 peri 1.8 \
+	nx 1 ny 1 dummy 0 lmin 0.45 wmin 0.45 \
+	elc 1 erc 1 etc 1 ebc 1 doverlap 0 \
+	full_metal 1}
+}
+
+proc sky130::pdiode_h_defaults {} {
+    return {w 0.45 l 0.45 area 0.2024 peri 1.8 \
+	nx 1 ny 1 dummy 0 lmin 0.45 wmin 0.45 \
+	elc 1 erc 1 etc 1 ebc 1 \
+	glc 1 grc 1 gtc 1 gbc 1 doverlap 0 \
+	compatible {pdiode pdiode_h} full_metal 1}
+}
+
+#----------------------------------------------------------------
+
+proc sky130::ndiode_convert {parameters} {
+    return [sky130::diode_convert $parameters]
+}
+
+proc sky130::ndiode_lvt_convert {parameters} {
+    return [sky130::diode_convert $parameters]
+}
+
+proc sky130::pdiode_convert {parameters} {
+    return [sky130::diode_convert $parameters]
+}
+
+proc sky130::pdiode_lvt_convert {parameters} {
+    return [sky130::diode_convert $parameters]
+}
+
+proc sky130::pdiode_hvt_convert {parameters} {
+    return [sky130::diode_convert $parameters]
+}
+
+proc sky130::ndiode_h_convert {parameters} {
+    return [sky130::diode_convert $parameters]
+}
+
+proc sky130::ndiode_native_convert {parameters} {
+    return [sky130::diode_convert $parameters]
+}
+
+proc sky130::pdiode_h_convert {parameters} {
+    return [sky130::diode_convert $parameters]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::ndiode_dialog {parameters} {
+    sky130::diode_dialog ndiode $parameters
+}
+
+proc sky130::ndiode_lvt_dialog {parameters} {
+    sky130::diode_dialog ndiode_lvt $parameters
+}
+
+proc sky130::pdiode_dialog {parameters} {
+    sky130::diode_dialog pdiode $parameters
+}
+
+proc sky130::pdiode_lvt_dialog {parameters} {
+    sky130::diode_dialog pdiode_lvt $parameters
+}
+
+proc sky130::pdiode_hvt_dialog {parameters} {
+    sky130::diode_dialog pdiode_hvt $parameters
+}
+
+proc sky130::ndiode_h_dialog {parameters} {
+    sky130::diode_dialog ndiode_h $parameters
+}
+
+proc sky130::ndiode_native_dialog {parameters} {
+    sky130::diode_dialog ndiode_native $parameters
+}
+
+proc sky130::pdiode_h_dialog {parameters} {
+    sky130::diode_dialog pdiode_h $parameters
+}
+
+#----------------------------------------------------------------
+
+proc sky130::ndiode_check {parameters} {
+    sky130::diode_check $parameters
+}
+
+proc sky130::ndiode_lvt_check {parameters} {
+    sky130::diode_check $parameters
+}
+
+proc sky130::pdiode_check {parameters} {
+    sky130::diode_check $parameters
+}
+
+proc sky130::pdiode_lvt_check {parameters} {
+    sky130::diode_check $parameters
+}
+
+proc sky130::pdiode_hvt_check {parameters} {
+    sky130::diode_check $parameters
+}
+
+proc sky130::ndiode_h_check {parameters} {
+    sky130::diode_check $parameters
+}
+
+proc sky130::ndiode_native_check {parameters} {
+    sky130::diode_check $parameters
+}
+
+proc sky130::pdiode_h_check {parameters} {
+    sky130::diode_check $parameters
+}
+
+#----------------------------------------------------------------
+# Diode: Draw a single device
+#----------------------------------------------------------------
+
+proc sky130::diode_device {parameters} {
+    # Epsilon for avoiding round-off errors
+    set eps  0.0005
+
+    # Set local default values if they are not in parameters
+    set dev_surround 0
+    set dev_sub_type ""
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # If there is no end_sub_surround, set it to sub_surround
+    if {![dict exists $parameters end_sub_surround]} {
+	set end_sub_surround $sub_surround
+    }
+
+    # Draw the device
+    pushbox
+    box size 0 0
+
+    set hw [/ $w 2.0]
+    set hl [/ $l 2.0]
+
+    # Calculate ring size (measured to contact center)
+    set gx [+ $w [* 2.0 [+ $dev_spacing $dev_surround]] $contact_size]
+    set gy [+ $l [* 2.0 [+ $dev_spacing $dev_surround]] $contact_size]
+
+    # Draw the ring first, because diode may occupy well/substrate plane
+    set guardparams $parameters
+    dict set guardparams plus_diff_type $end_type
+    dict set guardparams plus_contact_type $end_contact_type
+    dict set guardparams diff_surround $end_surround
+    dict set guardparams sub_type $end_sub_type
+    dict set guardparams sub_surround $sub_surround
+    dict set guardparams guard_sub_surround $end_sub_surround
+    dict set guardparams glc $elc
+    dict set guardparams grc $erc
+    dict set guardparams gtc $etc
+    dict set guardparams gbc $ebc
+    set cext [sky130::guard_ring $gx $gy $guardparams]
+
+    pushbox
+    box grow n ${hl}um
+    box grow s ${hl}um
+    box grow e ${hw}um
+    box grow w ${hw}um
+    paint ${dev_type}
+    set cext [sky130::unionbox $cext [sky130::getbox]]
+
+    if {$dev_sub_type != ""} {
+	box grow n ${sub_surround}um
+	box grow s ${sub_surround}um
+	box grow e ${sub_surround}um
+	box grow w ${sub_surround}um
+	paint ${dev_sub_type}
+    }
+    popbox
+
+    if {${w} < ${l}} {
+	set orient vert
+    } else {
+	set orient horz
+    }
+
+    # Reduce width by surround amount
+    set w [- $w [* ${dev_surround} 2.0]]
+    set l [- $l [* ${dev_surround} 2.0]]
+
+    set cext [sky130::unionbox $cext [sky130::draw_contact ${w} ${l} \
+		${dev_surround} ${metal_surround} ${contact_size} \
+		${dev_type} ${dev_contact_type} li ${orient}]]
+
+    popbox
+    return $cext
+}
+
+#----------------------------------------------------------------
+# Diode: Draw the tiled device
+#----------------------------------------------------------------
+
+proc sky130::diode_draw {parameters} {
+    tech unlock *
+
+    # Set defaults if they are not in parameters
+    set doverlap 0	;# overlap diodes at contacts
+    set guard 0		;# draw a guard ring
+    set prohibit_overlap false  ;# don't prohibit overlaps
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # Normalize distance units to microns
+    set w [magic::spice2float $w]
+    set l [magic::spice2float $l]
+
+    pushbox
+    box values 0 0 0 0
+
+    # Determine the base device dimensions by drawing one device
+    # while all layers are locked (nothing drawn).  This allows the
+    # base drawing routine to do complicated geometry without having
+    # to duplicate it here with calculations.
+
+    tech lock *
+    set bbox [sky130::diode_device $parameters]
+    # puts stdout "Diagnostic: Device bounding box e $bbox (um)"
+    tech unlock *
+
+    set fw [- [lindex $bbox 2] [lindex $bbox 0]]
+    set fh [- [lindex $bbox 3] [lindex $bbox 1]]
+    set lw [+ [lindex $bbox 2] [lindex $bbox 0]]
+    set lh [+ [lindex $bbox 3] [lindex $bbox 1]]
+
+    # If prohibit_overlap is true, then end overlapping is prohibited when
+    # nx or ny is > 1 to prevent DRC errors (typically from well spacing rule)
+    if {$prohibit_overlap == true} {
+        if {($nx > 1) || ($ny > 1)} {
+	    set doverlap 0
+	}
+    }
+
+    # Determine tile width and height (depends on overlap)
+
+    if {$doverlap == 0} {
+	set dx [+ $fw $end_spacing]
+        set dy [+ $fh $end_spacing]
+    } else {
+        # overlap contact
+        set dx [- $fw [+ [* 2.0 $sub_surround] [* 2.0 $end_surround] $contact_size]]
+        set dy [- $fh [+ [* 2.0 $sub_surround] [* 2.0 $end_surround] $contact_size]]
+    }
+
+    # Determine core width and height
+    set corex [+ [* [- $nx 1] $dx] $fw]
+    set corey [+ [* [- $ny 1] $dy] $fh]
+    set corellx [/ [+ [- $corex $fw] $lw] 2.0]
+    set corelly [/ [+ [- $corey $fh] $lh] 2.0]
+
+    if {$guard != 0} {
+	# Calculate guard ring size (measured to contact center)
+	set gx [+ $corex [* 2.0 [+ $diff_spacing $diff_surround]] $contact_size]
+	set gy [+ $corey [* 2.0 [+ $diff_spacing $diff_surround]] $contact_size]
+
+	# Draw the guard ring first, because diode may occupy well/substrate plane
+	sky130::guard_ring $gx $gy $parameters
+    }
+
+    pushbox
+    box move w ${corellx}um
+    box move s ${corelly}um
+    if {($nx > 1) || ($ny > 1)} {
+	pushbox
+	set hfw [/ $fw 2.0]
+	set hfh [/ $fh 2.0]
+	box move w ${hfw}um
+	box move s ${hfh}um
+	box size ${corex}um ${corey}um
+	paint $end_sub_type
+	popbox
+    }
+    for {set xp 0} {$xp < $nx} {incr xp} {
+	pushbox
+	for {set yp 0} {$yp < $ny} {incr yp} {
+	    sky130::diode_device $parameters
+            box move n ${dy}um
+        }
+	popbox
+        box move e ${dx}um
+    }
+    popbox
+    popbox
+
+    tech revert
+}
+
+#----------------------------------------------------------------
+
+proc sky130::ndiode_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    dev_type		ndiode \
+	    dev_contact_type	ndic \
+	    end_type		psd \
+	    end_contact_type	psc \
+	    end_sub_type	psub \
+	    dev_spacing		${diff_spacing} \
+	    dev_surround	${diff_surround} \
+	    end_spacing		${diff_spacing} \
+	    end_surround	0 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::diode_draw $drawdict]
+} 
+
+#----------------------------------------------------------------
+# NOTE:  Use ppd instead of psd so that there is additional
+# diffusion around the contact, allowing more space for the
+# implant (likewise pdiode_lvt and pdiode_hvt).
+
+proc sky130::ndiode_lvt_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    dev_type		ndiodelvt \
+	    dev_contact_type	ndilvtc \
+	    end_type		ppd \
+	    end_contact_type	psc \
+	    end_sub_type	psub \
+	    dev_spacing		${diff_spacing} \
+	    dev_surround	${diff_surround} \
+	    end_spacing		${diff_spacing} \
+	    end_surround	${diff_surround} \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::diode_draw $drawdict]
+} 
+
+#----------------------------------------------------------------
+
+proc sky130::pdiode_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    dev_type		pdiode \
+	    guard		1 \
+	    dev_contact_type	pdic \
+	    end_type		nsd \
+	    end_contact_type	nsc \
+	    end_sub_type	nwell \
+	    plus_diff_type	psd \
+	    plus_contact_type	psc \
+	    sub_type		psub \
+	    dev_spacing		${diff_spacing} \
+	    dev_surround	${diff_surround} \
+	    end_spacing		${diff_spacing} \
+	    end_surround	0 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::diode_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::pdiode_lvt_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    dev_type		pdiodelvt \
+	    guard		1 \
+	    dev_contact_type	pdilvtc \
+	    end_type		nnd \
+	    end_contact_type	nsc \
+	    end_sub_type	nwell \
+	    plus_diff_type	psd \
+	    plus_contact_type	psc \
+	    sub_type		psub \
+	    dev_spacing		${diff_spacing} \
+	    dev_surround	${diff_surround} \
+	    end_spacing		${diff_spacing} \
+	    end_surround	${diff_surround} \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::diode_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::pdiode_hvt_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    dev_type		pdiodehvt \
+	    guard		1 \
+	    dev_contact_type	pdihvtc \
+	    end_type		nnd \
+	    end_contact_type	nsc \
+	    end_sub_type	nwell \
+	    plus_diff_type	psd \
+	    plus_contact_type	psc \
+	    sub_type		psub \
+	    dev_spacing		${diff_spacing} \
+	    dev_surround	${diff_surround} \
+	    end_spacing		${diff_spacing} \
+	    end_surround	${diff_surround} \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::diode_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::ndiode_h_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    dev_type		mvndiode \
+	    dev_contact_type	mvndic \
+	    end_type		mvpsd \
+	    end_contact_type	mvpsc \
+	    end_sub_type	psub \
+	    diff_spacing	0.37 \
+	    dev_spacing		0.39 \
+	    dev_surround	${diff_surround} \
+	    end_spacing		0.36 \
+	    end_surround	${diff_surround} \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::diode_draw $drawdict]
+}
+
+
+proc sky130::ndiode_native_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    dev_type		nndiode \
+	    dev_contact_type	nndic \
+	    end_type		mvpsd \
+	    end_contact_type	mvpsc \
+	    end_sub_type	psub \
+	    dev_spacing		0.37 \
+	    dev_surround	${diff_surround} \
+	    end_spacing		0.30 \
+	    end_surround	${diff_surround} \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::diode_draw $drawdict]
+} 
+
+
+#----------------------------------------------------------------
+
+proc sky130::pdiode_h_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    guard		1 \
+	    dev_type 		mvpdiode \
+	    dev_contact_type	mvpdic \
+	    end_type		mvnsd \
+	    end_contact_type	mvnsc \
+	    end_sub_type	nwell \
+	    plus_diff_type	mvpsd \
+	    plus_contact_type	mvpsc \
+	    sub_type		psub \
+	    diff_spacing	0.58 \
+	    dev_spacing		0.37 \
+	    dev_surround	${diff_surround} \
+	    end_spacing		0.30 \
+	    end_sub_surround	0.33 \
+	    end_surround	${diff_surround} \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::diode_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+# Drawn capactitor routines
+# NOTE:  Work in progress.  These values need to be corrected.
+#----------------------------------------------------------------
+
+#ifdef MIM
+proc sky130::xcmimc1_defaults {} {
+    return {w 2.00 l 2.00 val 4.0 carea 1.00 cperi 0.17 \
+		nx 1 ny 1 dummy 0 square 0 lmin 2.00 wmin 2.00 \
+		lmax 30.0 wmax 30.0 dc 0 bconnect 1 tconnect 1}
+}
+proc sky130::xcmimc2_defaults {} {
+    return {w 2.00 l 2.00 val 4.0 carea 1.00 cperi 0.17 \
+		nx 1 ny 1 dummy 0 square 0 lmin 2.00 wmin 2.00 \
+		lmax 30.0 wmax 30.0 dc 0 bconnect 1 tconnect 1}
+}
+#endif (MIM)
+
+
+#----------------------------------------------------------------
+# Recalculate capacitor values from GUI entries.
+# Recomputes W/L and Value as long as 2 of them are present
+# (To be completed)
+#----------------------------------------------------------------
+
+proc sky130::cap_recalc {field parameters} {
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+    switch  $field {
+	val { puts stdout "value changed" }
+	w   { puts stdout "width changed" }
+	l   { puts stdout "length changed" }
+    }
+    dict set parameters val $val
+    dict set parameters w $w
+    dict set parameters l $l
+}
+
+#----------------------------------------------------------------
+# Capacitor defaults:
+#----------------------------------------------------------------
+#  w      Width of drawn cap
+#  l      Length of drawn cap
+#  nx     Number of devices in X
+#  ny     Number of devices in Y
+#  val    Default cap value
+#  carea  Area
+#  cperi  Perimeter
+#  dummy  Add dummy cap
+#  square Make square capacitor
+#
+#  (not user-editable)
+#
+#  wmin   Minimum allowed width
+#  lmin   Minimum allowed length
+#  dc     Area to remove to calculated area 
+#----------------------------------------------------------------
+
+#----------------------------------------------------------------
+# capacitor: Conversion from SPICE netlist parameters to toolkit
+#----------------------------------------------------------------
+
+proc sky130::cap_convert {parameters} {
+    set pdkparams [dict create]
+    dict for {key value} $parameters {
+	switch -nocase $key {
+	    l -
+	    w {
+		# Length and width are converted to units of microns
+		set value [magic::spice2float $value]
+		# set value [expr $value * 1e6]
+		set value [magic::3digitpastdecimal $value]
+		dict set pdkparams [string tolower $key] $value
+	    }
+	    m {
+                # Convert m to ny
+		dict set pdkparams ny $value
+	    }
+	}
+    }
+    return $pdkparams
+}
+
+#ifdef MIM
+proc sky130::xcmimc1_convert {parameters} {
+    return [cap_convert $parameters]
+}
+proc sky130::xcmimc2_convert {parameters} {
+    return [cap_convert $parameters]
+}
+#endif (MIM)
+
+#----------------------------------------------------------------
+# capacitor: Interactively specifies the fixed layout parameters
+#----------------------------------------------------------------
+
+proc sky130::cap_dialog {device parameters} {
+    # Editable fields:      w, l, nx, ny, val
+    # Checked fields:  	    square, dummy
+
+    magic::add_entry val "Value (fF)" $parameters
+    sky130::compute_ctot $parameters
+    magic::add_message ctot "Total capacitance (pF)" $parameters
+    magic::add_entry l "Length (um)" $parameters
+    magic::add_entry w "Width (um)" $parameters
+    magic::add_entry nx "X Repeat" $parameters
+    magic::add_entry ny "Y Repeat" $parameters
+
+    if {[dict exists $parameters square]} {
+	magic::add_checkbox square "Square capacitor" $parameters
+    }
+    if {[dict exists $parameters bconnect]} {
+	magic::add_checkbox bconnect "Connect bottom plates in array" $parameters
+    }
+    if {[dict exists $parameters tconnect]} {
+	magic::add_checkbox tconnect "Connect top plates in array" $parameters
+    }
+    if {[dict exists $parameters guard]} {
+	magic::add_checkbox guard "Add guard ring" $parameters
+    }
+
+    magic::add_dependency sky130::cap_recalc $device sky130 l w val
+
+    # magic::add_checkbox dummy "Add dummy" $parameters
+}
+
+#ifdef MIM
+proc sky130::xcmimc1_dialog {parameters} {
+    sky130::cap_dialog xcmimc1 $parameters
+}
+proc sky130::xcmimc2_dialog {parameters} {
+    sky130::cap_dialog xcmimc2 $parameters
+}
+#endif (MIM)
+
+#----------------------------------------------------------------
+# Capacitor total capacitance computation
+#----------------------------------------------------------------
+
+proc sky130::compute_ctot {parameters} {
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+    set val [magic::spice2float $val]
+    set val [magic::3digitpastdecimal $val]
+
+    # Compute total capacitance (and convert fF to pF)
+    catch {set magic::ctot_val [expr (0.001 * $val * $nx * $ny)]}
+}
+
+#----------------------------------------------------------------
+# Capacitor: Draw a single device
+#----------------------------------------------------------------
+
+proc sky130::cap_device {parameters} {
+    # Epsilon for avoiding round-off errors
+    set eps  0.0005
+
+    # Set local default values if they are not in parameters
+    set cap_surround 0
+    set bot_surround 0
+    set top_surround 0
+    set bconnect 0	    ;# bottom plates are connected in array
+    set cap_spacing 0	    ;# cap spacing in array
+    set top_metal_space 0   ;# top metal spacing (if larger than cap spacing)
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    if {![dict exists $parameters top_metal_space]} {
+	set top_metal_space $metal_spacing
+    }
+
+    # Draw the device
+    pushbox
+    box size 0 0
+
+    pushbox
+    set hw [/ $w 2.0]
+    set hl [/ $l 2.0]
+    box grow e ${hw}um
+    box grow w ${hw}um
+    box grow n ${hl}um
+    box grow s ${hl}um
+    paint ${cap_type}
+    pushbox
+    box grow n -${cap_surround}um
+    box grow s -${cap_surround}um
+    box grow e -${cap_surround}um
+    box grow w -${cap_surround}um
+    paint ${cap_contact_type}
+    pushbox
+    box grow n ${top_surround}um
+    box grow s ${top_surround}um
+    box grow e ${top_surround}um
+    box grow w ${top_surround}um
+    paint ${top_type}
+    set cext [sky130::getbox]
+    popbox
+    popbox
+    pushbox
+    box grow n ${bot_surround}um
+    box grow s ${bot_surround}um
+    box grow e ${bot_surround}um
+    box grow w ${bot_surround}um
+
+    paint ${bot_type}
+    # Create boundary using properties
+    property FIXED_BBOX [box values]
+    set cext [sky130::unionbox $cext [sky130::getbox]]
+
+    # Extend bottom metal under contact to right
+    box grow e ${end_spacing}um
+    set chw [/ ${contact_size} 2.0]
+    box grow e ${chw}um
+    box grow e ${end_surround}um
+    paint ${bot_type}
+
+    popbox
+    popbox
+
+    # Draw contact to right.  Reduce contact extent if devices are not
+    # wired together and the top metal spacing rule limits the distance
+    set lcont $l
+    if {($bconnect == 0) && ($ny > 1)} {
+	if {$cap_spacing < $top_metal_space} {
+	    set cspace [- $top_metal_space $cap_spacing]
+	    set lcont [- $l $cspace]
+	}
+    }
+
+    pushbox
+    box move e ${hw}um
+    box move e ${bot_surround}um
+    box move e ${end_spacing}um
+    set cl [- [+ ${lcont} [* ${bot_surround} 2.0]] [* ${end_surround} 2.0]]
+    set cl [- ${cl} ${metal_surround}]  ;# see below
+    set cext [sky130::unionbox $cext [sky130::draw_contact 0 ${cl} \
+		${end_surround} ${metal_surround} ${contact_size} \
+		${bot_type} ${top_contact_type} ${top_type} full]]
+    popbox
+    popbox
+
+    return $cext
+
+    # cl shrinks top and bottom to accomodate larger bottom metal
+    # surround rule for contacts near a MiM cap.  This should be its
+    # own variable, but metal_surround is sufficient.
+}
+
+#----------------------------------------------------------------
+# Metal plate sandwich capacitor:  Draw a single device
+#----------------------------------------------------------------
+
+proc sky130::sandwich_cap_device {parameters} {
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    pushbox
+    box size 0 0
+
+    set hw [/ $w 2.0]
+    set hl [/ $l 2.0]
+
+    set cw [- [* $hw [/ 2.0 3]] [* $cont_surround 2.0]]
+    set cl [- [* $hl [/ 2.0 3]] [* $cont_surround 2.0]]
+
+    # plate capacitor defines layers p0, p1, etc.
+    for {set i 0} {$i < 20} {incr i} {
+        if {[catch {set layer [subst \$p${i}_type]}]} {break}  ;# no more layers defined
+	pushbox
+	box grow e ${hw}um
+	box grow w ${hw}um
+	box grow n ${hl}um
+	box grow s ${hl}um
+        if {![catch {set shrink [subst \$p${i}_shrink]}]} {
+	    box grow e -${shrink}um
+	    box grow w -${shrink}um
+	    box grow n -${shrink}um
+	    box grow s -${shrink}um
+	    set cutout_spacing [+ [* ${shrink} 2.0] [/ $via_size 2.0] $cont_surround]
+	} else {
+	    set cutout_spacing 0
+	}
+
+	paint ${layer}
+
+	if {$i == 1} {
+	    # Note that cap_type geometry is coincident with p1_type.
+	    # Typically, this will define a layer that outputs as both
+	    # poly and a capacitor definition layer.
+	    if {[dict exists $parameters cap_type]} {
+		paint $cap_type
+	    }
+	}
+	popbox
+
+	# Even layers connect at corners, odd layers connect at sides.
+	# Even layers cut out the sides, odd layers cut out the corners.
+	# Layer zero has no side contacts or cutout.
+
+	if {[% $i 2] == 0} {
+	    set cornercmd  paint
+	    set cornersize $cutout_spacing
+	    set sidecmd    erase
+	    set nssidelong   [+ $cutout_spacing [/ $hw 3.0]]
+	    set ewsidelong   [+ $cutout_spacing [/ $hl 3.0]]
+	    set sideshort    $cutout_spacing
+	} else {
+	    set cornercmd  erase
+	    set cornersize $cutout_spacing
+	    set sidecmd    paint
+	    set nssidelong   [/ $hw 3.0]
+	    set ewsidelong   [/ $hl 3.0]
+	    set sideshort    $cutout_spacing
+	}
+
+	if {$i > 0} {
+	    pushbox
+	    box move e ${hw}um
+	    box grow n ${ewsidelong}um
+	    box grow s ${ewsidelong}um
+	    box grow w ${sideshort}um
+	    ${sidecmd} ${layer}
+	    popbox
+	    pushbox
+	    box move n ${hl}um
+	    box grow e ${nssidelong}um
+	    box grow w ${nssidelong}um
+	    box grow s ${sideshort}um
+	    ${sidecmd} ${layer}
+	    popbox
+	    pushbox
+	    box move w ${hw}um
+	    box grow n ${ewsidelong}um
+	    box grow s ${ewsidelong}um
+	    box grow e ${sideshort}um
+	    ${sidecmd} ${layer}
+	    popbox
+	    pushbox
+	    box move s ${hl}um
+	    box grow e ${nssidelong}um
+	    box grow w ${nssidelong}um
+	    box grow n ${sideshort}um
+	    ${sidecmd} ${layer}
+	    popbox
+
+	    pushbox
+	    box move n ${hl}um
+	    box move e ${hw}um
+	    box grow s ${cornersize}um
+	    box grow w ${cornersize}um
+	    ${cornercmd} ${layer}
+	    popbox
+	    pushbox
+	    box move n ${hl}um
+	    box move w ${hw}um
+	    box grow s ${cornersize}um
+	    box grow e ${cornersize}um
+	    ${cornercmd} ${layer}
+	    popbox
+	    pushbox
+	    box move s ${hl}um
+	    box move e ${hw}um
+	    box grow n ${cornersize}um
+	    box grow w ${cornersize}um
+	    ${cornercmd} ${layer}
+	    popbox
+	    pushbox
+	    box move s ${hl}um
+	    box move w ${hw}um
+	    box grow n ${cornersize}um
+	    box grow e ${cornersize}um
+	    ${cornercmd} ${layer}
+	    popbox
+	}
+    }
+
+    # Draw contacts after all layers have been drawn, so that erasing
+    # layers does not affect the contacts.
+
+    for {set i 0} {$i < 20} {incr i} {
+        if {![catch {set contact [subst \$p${i}_contact_type]}]} {
+	    set layer [subst \$p${i}_type]
+	    set j [+ $i 1]
+	    set toplayer [subst \$p${j}_type]
+
+	    # Draw corner contacts
+	    pushbox
+	    box move e ${hw}um
+	    box move n ${hl}um
+	    sky130::draw_contact 0 0 \
+			${cont_surround} ${cont_surround} ${via_size} \
+			${layer} ${contact} ${toplayer} full
+	    popbox
+	    pushbox
+	    box move w ${hw}um
+	    box move n ${hl}um
+	    sky130::draw_contact 0 0 \
+			${cont_surround} ${cont_surround} ${via_size} \
+			${layer} ${contact} ${toplayer} full
+	    popbox
+	    pushbox
+	    box move e ${hw}um
+	    box move s ${hl}um
+	    sky130::draw_contact 0 0 \
+			${cont_surround} ${cont_surround} ${via_size} \
+			${layer} ${contact} ${toplayer} full
+	    popbox
+	    pushbox
+	    box move w ${hw}um
+	    box move s ${hl}um
+	    sky130::draw_contact 0 0 \
+			${cont_surround} ${cont_surround} ${via_size} \
+			${layer} ${contact} ${toplayer} full
+	    popbox
+
+	    # Draw side contacts (except on poly)
+	    if {$i > 0} {
+		pushbox
+		box move w ${hw}um
+		sky130::draw_contact 0 ${cl} \
+			${cont_surround} ${cont_surround} ${via_size} \
+			${layer} ${contact} ${toplayer} full
+		popbox
+		pushbox
+		box move e ${hw}um
+		sky130::draw_contact 0 ${cl} \
+			${cont_surround} ${cont_surround} ${via_size} \
+			${layer} ${contact} ${toplayer} full
+		popbox
+		pushbox
+		box move n ${hl}um
+		sky130::draw_contact ${cw} 0 \
+			${cont_surround} ${cont_surround} ${via_size} \
+			${layer} ${contact} ${toplayer} full
+		popbox
+		pushbox
+		box move s ${hl}um
+		sky130::draw_contact ${cw} 0 \
+			${cont_surround} ${cont_surround} ${via_size} \
+			${layer} ${contact} ${toplayer} full
+		popbox
+	    }
+	} else {
+	    break
+	}
+    }
+
+    popbox
+    # Bounding box is the same as the device length and width
+    set cext [list -$hw -$hl $hw $hl]
+    return $cext
+}
+
+#----------------------------------------------------------------
+# Capacitor: Draw the tiled device
+#----------------------------------------------------------------
+
+proc sky130::cap_draw {parameters} {
+    tech unlock *
+    set savesnap [snap]
+    snap internal
+
+    # Set defaults if they are not in parameters
+    set coverlap 0	;# overlap capacitors at contacts
+    set guard 0		;# draw a guard ring
+    set sandwich 0	;# this is not a plate sandwich capacitor
+    set cap_spacing 0	;# abutted caps if spacing is zero
+    set cap_diff_spacing 0
+    set wide_cap_spacing 0  ;# additional spacing for wide metal rule
+    set wide_cap_width 0
+    set end_spacing 0
+    set end_surround 0
+    set bot_surround 0
+    set top_metal_width 0
+    set bconnect 0	;# connect bottom plates in array
+    set tconnect 0	;# connect top plates in array
+    set top_type ""
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # Normalize distance units to microns
+    set w [magic::spice2float $w]
+    set l [magic::spice2float $l]
+
+    pushbox
+    box values 0 0 0 0
+
+    # Determine the base device dimensions by drawing one device
+    # while all layers are locked (nothing drawn).  This allows the
+    # base drawing routine to do complicated geometry without having
+    # to duplicate it here with calculations.
+
+    tech lock *
+    if {$sandwich == 1} {
+	set bbox [sky130::sandwich_cap_device $parameters]
+    } else {
+	set bbox [sky130::cap_device $parameters]
+    }
+    # puts stdout "Diagnostic: Device bounding box e $bbox (um)"
+    tech unlock *
+
+    set fw [- [lindex $bbox 2] [lindex $bbox 0]]
+    set fh [- [lindex $bbox 3] [lindex $bbox 1]]
+    set lw [+ [lindex $bbox 2] [lindex $bbox 0]]
+    set lh [+ [lindex $bbox 3] [lindex $bbox 1]]
+
+    set dwide 0
+    if {($fw >= $wide_cap_width) && ($fh >= $wide_cap_width)} {
+	set dwide $wide_cap_spacing
+    }
+
+    # Determine tile width and height (depends on overlap)
+    if {$coverlap == 0} {
+        set dy [+ $fh $cap_spacing $dwide]
+    } else {
+        # overlap at end contact
+        set dy [- $fh [+ $end_surround $end_surround $contact_size]]
+    }
+    # Contact is placed on right so spacing is determined by end_spacing.
+    set dx [+ $fw $end_spacing $dwide]
+
+    # Determine core width and height
+    set corex [+ [* [- $nx 1] $dx] $fw]
+    set corey [+ [* [- $ny 1] $dy] $fh]
+    set corellx [/ [+ [- $corex $fw] $lw] 2.0]
+    set corelly [/ [+ [- $corey $fh] $lh] 2.0]
+
+    if {$guard != 0} {
+	# Calculate guard ring size (measured to contact center)
+	set gx [+ $corex [* 2.0 [+ $cap_diff_spacing $diff_surround]] $contact_size]
+	set gy [+ $corey [* 2.0 [+ $end_spacing $diff_surround]] $contact_size]
+
+	# Draw the guard ring first.
+	sky130::guard_ring $gx $gy $parameters
+    }
+
+    set twidth [+ ${contact_size} ${end_surround} ${end_surround}]
+    if {${twidth} < ${top_metal_width}} {
+	set twidth ${top_metal_width}
+    }
+    set hmw [/ $twidth 2.0]
+    set hdy [/ $dy 2.0]
+    set cdx [+ [/ ${w} 2.0] ${bot_surround} ${end_spacing}]
+
+    pushbox
+    box move w ${corellx}um
+    box move s ${corelly}um
+    for {set xp 0} {$xp < $nx} {incr xp} {
+	pushbox
+	for {set yp 0} {$yp < $ny} {incr yp} {
+	    if {$sandwich == 1} {
+		sky130::sandwich_cap_device $parameters
+	    } else {
+		sky130::cap_device $parameters
+	    }
+	    if {$ny > 1} {
+		pushbox
+		box grow e ${hmw}um
+		box grow w ${hmw}um
+		box grow n ${hdy}um
+		box grow s ${hdy}um
+		if {($top_type != "") && ($tconnect == 1)} {
+		    paint ${top_type}
+		}
+		if {($top_type != "") && ($bconnect == 1)} {
+		    box move e ${cdx}um
+		    paint ${top_type}
+		}
+		popbox
+	    }
+            box move n ${dy}um
+        }
+	popbox
+        box move e ${dx}um
+    }
+    popbox
+    popbox
+
+    snap $savesnap
+    tech revert
+}
+
+#----------------------------------------------------------------
+
+#ifdef MIM
+proc sky130::xcmimc1_draw {parameters} {
+    set newdict [dict create \
+	    top_type 		m4 \
+	    top_contact_type	via3 \
+	    cap_type 		mimcap \
+	    cap_contact_type	mimcc \
+	    bot_type 		m3 \
+	    bot_surround	0.5 \
+	    cap_spacing		0.5 \
+	    cap_surround	0.2 \
+	    top_surround	0.005 \
+	    end_surround	0.1 \
+	    end_spacing		0.60 \
+	    contact_size	0.32 \
+	    metal_surround	0.08 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::cap_draw $drawdict]
+}
+
+proc sky130::xcmimc2_draw {parameters} {
+    set newdict [dict create \
+	    top_type 		m5 \
+	    top_contact_type	via4 \
+	    cap_type 		mimcap2 \
+	    cap_contact_type	mim2cc \
+	    bot_type 		m4 \
+	    bot_surround	0.5 \
+	    cap_spacing		0.5 \
+	    cap_surround	0.2 \
+	    top_surround	0.12 \
+	    end_surround	0.1 \
+	    end_spacing		2.10 \
+	    contact_size	1.18 \
+	    metal_surround	0.21 \
+	    top_metal_width	1.6 \
+	    top_metal_space	1.7 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::cap_draw $drawdict]
+}
+
+#endif (MIM)
+
+#----------------------------------------------------------------
+# capacitor: Check device parameters for out-of-bounds values
+#----------------------------------------------------------------
+
+proc sky130::cap_check {parameters} {
+    # In case wmax and/or lmax are undefined
+    set lmax 0
+    set wmax 0
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # Normalize distance units to microns
+    set l [magic::spice2float $l]
+    set l [magic::3digitpastdecimal $l] 
+    set w [magic::spice2float $w]
+    set w [magic::3digitpastdecimal $w] 
+
+    set val   [magic::spice2float $val]
+    set carea [magic::spice2float $carea]
+    set cperi [magic::spice2float $cperi]
+    set dc    [magic::spice2float $dc]
+
+    if {$square == 1} {
+        # Calculate L and W from value
+	set a $carea
+	set b [expr $cperi * 4]
+	set c [expr -4 * $dc - $val]
+	set l [expr ((-$b + sqrt($b * $b - (4 * $a * $c))) / (2 * $a))]
+	dict set parameters l [magic::float2spice $l]
+	set w $l
+	dict set parameters w [magic::float2spice $w]
+    } elseif {$l == 0} {
+        # Calculate L from W and value
+	set l [expr (($val + 4 * $dc - 2 * $w * $cperi) / ($w * $carea + 2 * $cperi))]
+	dict set parameters l [magic::float2spice $l]
+    } elseif {$w == 0} {
+        # Calculate W from L and value
+	set w [expr (($val + 4 * $dc - 2 * $l * $cperi) / ($l * $carea + 2 * $cperi))]
+	dict set parameters w [magic::float2spice $w]
+    }
+    if {$w < $wmin} {
+	puts stderr "Capacitor width must be >= $wmin"
+	dict set parameters w $wmin
+	set w $wmin
+    } 
+    if {$l < $lmin} {
+	puts stderr "Capacitor length must be >= $lmin"
+	dict set parameters l $lmin
+	set l $lmin
+    } 
+    if {($wmax > 0) && ($w > $wmax)} {
+	puts stderr "Capacitor width must be <= $wmax"
+	dict set parameters w $wmax
+	set w $wmax
+    } 
+    if {($lmax > 0) && ($l > $lmax)} {
+	puts stderr "Capacitor length must be <= $lmax"
+	dict set parameters l $lmax
+	set l $lmax
+    } 
+    # Calculate value from L and W
+    set cval [expr ($l * $w * $carea + 2 * ($l + $w) * $cperi - 4 * $dc)]
+    dict set parameters val [magic::float2spice $cval]
+    sky130::compute_ctot $parameters
+
+    return $parameters
+}
+
+#ifdef MIM
+proc sky130::xcmimc1_check {parameters} {
+    return [sky130::cap_check $parameters]
+}
+proc sky130::xcmimc2_check {parameters} {
+    return [sky130::cap_check $parameters]
+}
+#endif (MIM)
+
+#----------------------------------------------------------------
+# Drawn resistors
+#----------------------------------------------------------------
+
+#----------------------------------------------------------------
+# Resistor defaults:
+#----------------------------------------------------------------
+# User editable values:
+#
+#  val   Resistor value in ohms
+#  w	 Width
+#  l	 Length
+#  t	 Number of turns
+#  m	 Number devices in Y
+#  nx	 Number devices in X
+#  snake Use snake geometry (if not present, snake geometry not allowed)
+#  dummy Flag to mark addition of dummy resistor
+#
+# Non-user editable values:
+#
+#  wmin  Minimum allowed width
+#  lmin  Minimum allowed length
+#  rho	 Resistance in ohms per square
+#  dw    Delta width
+#  term  Resistance per terminal
+#  sterm Additional resistance per terminal for snake geometry
+#----------------------------------------------------------------
+
+#----------------------------------------------------------------
+# xpwres: Specify all user-editable default values and those
+# needed by xpwres_check
+# NOTE:  Work in progress.  These values need to be corrected.
+#----------------------------------------------------------------
+
+proc sky130::xpwres_defaults {} {
+    return {w 2.650 l 26.50 m 1 nx 1 wmin 2.650 lmin 26.50 \
+	 	rho 975 val 4875 dummy 0 dw 0.25 term 1.0 \
+		endcov 100 full_metal 1}
+}
+
+#----------------------------------------------------------------
+# rpp1: Specify all user-editable default values and those
+# needed by rp1_check
+#----------------------------------------------------------------
+
+proc sky130::mrp1_defaults {} {
+    return {w 0.330 l 1.650 m 1 nx 1 wmin 0.330 lmin 1.650 \
+		rho 48.2 val 241 dummy 0 dw 0.0 term 0.0 \
+		sterm 0.0 caplen 0.4 snake 0 \
+		glc 1 grc 1 gtc 1 gbc 1 roverlap 0 endcov 100 \
+		full_metal 1}
+}
+
+# "term" is rho * 0.06, the distance between xpc edge and CONT.
+proc sky130::xhrpoly_defaults {} {
+    return {w 0.350 l 0.50 m 1 nx 1 wmin 0.350 lmin 0.50 \
+		rho 319.8 val 456.857 dummy 0 dw 0.0 term 19.188 \
+		sterm 0.0 caplen 0 glc 1 grc 1 gtc 1 gbc 1 \
+		full_metal 1}
+}
+
+# "term" is rho * 0.06, the distance between xpc edge and CONT.
+proc sky130::uhrpoly_defaults {} {
+    return {w 0.350 l 0.50 m 1 nx 1 wmin 0.350 lmin 0.50 \
+		rho 2000 val 2875.143 dummy 0 dw 0.0 term 120 \
+		sterm 0.0 caplen 0 \
+		glc 1 grc 1 gtc 1 gbc 1 full_metal 1}
+}
+
+#----------------------------------------------------------------
+# mrdn: Specify all user-editable default values and those
+# needed by rdn_check
+#----------------------------------------------------------------
+
+proc sky130::mrdn_defaults {} {
+    return {w 0.420 l 2.100 m 1 nx 1 wmin 0.42 lmin 2.10 \
+		rho 120 val 600.0 dummy 0 dw 0.05 term 0.0 \
+		sterm 0.0 caplen 0.4 snake 0 \
+		glc 1 grc 1 gtc 1 gbc 1 roverlap 0 endcov 100 \
+		full_metal 1}
+}
+
+proc sky130::mrdn_hv_defaults {} {
+    return {w 0.420 l 2.100 m 1 nx 1 wmin 0.42 lmin 2.10 \
+		rho 120 val 600.0 dummy 0 dw 0.02 term 0.0 \
+		sterm 0.0 caplen 0.4 snake 0 \
+		glc 1 grc 1 gtc 1 gbc 1 roverlap 0 endcov 100 \
+		full_metal 1}
+}
+
+#----------------------------------------------------------------
+# mrdp: Specify all user-editable default values and those
+# needed by rdp_check
+#----------------------------------------------------------------
+
+proc sky130::mrdp_defaults {} {
+    return {w 0.420 l 2.100 m 1 nx 1 wmin 0.42 lmin 2.10 \
+		rho 197 val 985.0 dummy 0 dw 0.02 term 0.0 \
+		sterm 0.0 caplen 0.60 snake 0 \
+		glc 1 grc 1 gtc 1 gbc 1 roverlap 0 endcov 100 \
+		full_metal 1}
+}
+
+proc sky130::mrdp_hv_defaults {} {
+    return {w 0.420 l 2.100 m 1 nx 1 wmin 0.42 lmin 2.10 \
+		rho 197 val 985.0 dummy 0 dw 0.02 term 0.0 \
+		sterm 0.0 caplen 0.60 snake 0 \
+		glc 1 grc 1 gtc 1 gbc 1 roverlap 0 endcov 100 \
+		full_metal 1}
+}
+
+#----------------------------------------------------------------
+# mrl1: Specify all user-editable default values and those needed
+# by mrl1_check
+#----------------------------------------------------------------
+
+proc sky130::mrl1_defaults {} {
+    return {w 0.170 l 0.170 m 1 nx 1 wmin 0.17 lmin 0.17 \
+		rho 12.8 val 12.8 dummy 0 dw 0.0 term 0.0 snake 0 \
+		roverlap 0}
+}
+
+#----------------------------------------------------------------
+# mrm1: Specify all user-editable default values and those needed
+# by mrm1_check
+#----------------------------------------------------------------
+
+proc sky130::mrm1_defaults {} {
+    return {w 0.140 l 0.140 m 1 nx 1 wmin 0.14 lmin 0.14 \
+		rho 0.125 val 0.125 dummy 0 dw 0.0 term 0.0 \
+		roverlap 0}
+}
+
+#----------------------------------------------------------------
+# mrm2: Specify all user-editable default values and those needed
+# by mrm2_check
+#----------------------------------------------------------------
+
+proc sky130::mrm2_defaults {} {
+    return {w 0.140 l 0.140 m 1 nx 1 wmin 0.14 lmin 0.14 \
+		rho 0.125 val 0.125 dummy 0 dw 0.0 term 0.0 \
+		roverlap 0}
+}
+
+#----------------------------------------------------------------
+# mrm3: Specify all user-editable default values and those needed
+# by mrm3_check
+#----------------------------------------------------------------
+
+proc sky130::mrm3_defaults {} {
+    return {w 0.300 l 0.300 m 1 nx 1 wmin 0.30 lmin 0.30 \
+		rho 0.047 val 0.047 dummy 0 dw 0.0 term 0.0 \
+		roverlap 0}
+}
+
+#----------------------------------------------------------------
+# Additional entries for mrm4 and mrm5, depending on the
+# back-end metal stack.
+#----------------------------------------------------------------
+
+#ifdef METAL5
+proc sky130::mrm4_defaults {} {
+    return {w 0.300 l 0.300 m 1 nx 1 wmin 0.30 lmin 0.30 \
+		rho 0.047 val 0.047 dummy 0 dw 0.0 term 0.0 \
+		roverlap 0}
+}
+proc sky130::mrm5_defaults {} {
+    return {w 1.600 l 1.600 m 1 nx 1 wmin 1.60 lmin 1.60 \
+		rho 0.029 val 0.029 dummy 0 dw 0.0 term 0.0 \
+		roverlap 0}
+}
+#endif (METAL5)
+
+#----------------------------------------------------------------
+# resistor: Conversion from SPICE netlist parameters to toolkit
+#----------------------------------------------------------------
+
+proc sky130::res_convert {parameters} {
+    set pdkparams [dict create]
+    dict for {key value} $parameters {
+	switch -nocase $key {
+	    l -
+	    w {
+		# Length and width are converted to units of microns
+		set value [magic::spice2float $value]
+		# set value [expr $value * 1e6]
+		set value [magic::3digitpastdecimal $value]
+		dict set pdkparams [string tolower $key] $value
+	    }
+	}
+    }
+    return $pdkparams
+}
+
+#----------------------------------------------------------------
+
+proc sky130::xpwres_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+
+proc sky130::mrp1_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+
+proc sky130::xhrpoly_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+
+proc sky130::uhrpoly_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+
+proc sky130::mrdn_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+
+proc sky130::mrdp_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+
+proc sky130::mrdn_hv_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+
+proc sky130::mrdp_hv_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+
+proc sky130::mrl1_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+
+proc sky130::mrm1_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+
+proc sky130::mrm2_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+
+proc sky130::mrm3_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+
+#ifdef METAL5
+proc sky130::mrm4_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+proc sky130::mrm5_convert {parameters} {
+    return [sky130::res_convert $parameters]
+}
+#endif (METAL5)
+
+#----------------------------------------------------------------
+# resistor: Interactively specifies the fixed layout parameters
+#----------------------------------------------------------------
+
+proc sky130::res_dialog {device parameters} {
+    # Editable fields:      w, l, t, nx, m, val
+    # Checked fields:  
+
+    magic::add_entry val "Value (ohms)" $parameters
+    if {[dict exists $parameters snake]} {
+	sky130::compute_ltot $parameters
+	magic::add_message ltot "Total length (um)" $parameters
+    }
+    magic::add_entry l "Length (um)" $parameters
+    magic::add_entry w "Width (um)" $parameters
+    magic::add_entry nx "X Repeat" $parameters
+    magic::add_entry m "Y Repeat" $parameters
+    if {[dict exists $parameters endcov]} {
+	magic::add_entry endcov "End contact coverage (%)" $parameters
+    }
+
+    # magic::add_checkbox dummy "Add dummy" $parameters
+
+    if {[dict exists $parameters snake]} {
+	magic::add_checkbox snake "Use snake geometry" $parameters
+    }
+    if {[dict exists $parameters roverlap]} {
+	if {[dict exists $parameters endcov]} {
+            magic::add_checkbox roverlap "Overlap at end contact" $parameters
+	} else {
+            magic::add_checkbox roverlap "Overlap at ends" $parameters
+	}
+    }
+    magic::add_checkbox guard "Add guard ring" $parameters
+
+    if {[dict exists $parameters full_metal]} {
+	magic::add_checkbox full_metal "Full metal guard ring" $parameters
+    }
+    if {[dict exists $parameters glc]} {
+	magic::add_checkbox glc "Add left guard ring contact" $parameters
+    }
+    if {[dict exists $parameters grc]} {
+	magic::add_checkbox grc "Add right guard ring contact" $parameters
+    }
+    if {[dict exists $parameters gtc]} {
+	magic::add_checkbox gtc "Add top guard ring contact" $parameters
+    }
+    if {[dict exists $parameters gbc]} {
+	magic::add_checkbox gbc "Add bottom guard ring contact" $parameters
+    }
+
+    if {[dict exists $parameters snake]} {
+       magic::add_dependency sky130::res_recalc $device sky130 l w val nx snake
+    } else {
+       magic::add_dependency sky130::res_recalc $device sky130 l w val nx
+    }
+}
+
+#----------------------------------------------------------------
+
+proc sky130::xpwres_dialog {parameters} {
+    sky130::res_dialog xpwres $parameters
+}
+
+proc sky130::mrp1_dialog {parameters} {
+    sky130::res_dialog mrp1 $parameters
+}
+
+proc sky130::xhrpoly_dialog {parameters} {
+    sky130::res_dialog xhrpoly $parameters
+}
+
+proc sky130::uhrpoly_dialog {parameters} {
+    sky130::res_dialog uhrpoly $parameters
+}
+
+proc sky130::mrdn_dialog {parameters} {
+    sky130::res_dialog mrdn $parameters
+}
+
+proc sky130::mrdp_dialog {parameters} {
+    sky130::res_dialog mrdp $parameters
+}
+
+proc sky130::mrdn_hv_dialog {parameters} {
+    sky130::res_dialog mrdn_hv $parameters
+}
+
+proc sky130::mrdp_hv_dialog {parameters} {
+    sky130::res_dialog mrdp_hv $parameters
+}
+
+proc sky130::mrl1_dialog {parameters} {
+    sky130::res_dialog mrl1 $parameters
+}
+
+proc sky130::mrm1_dialog {parameters} {
+    sky130::res_dialog mrm1 $parameters
+}
+
+proc sky130::mrm2_dialog {parameters} {
+    sky130::res_dialog mrm2 $parameters
+}
+
+proc sky130::mrm3_dialog {parameters} {
+    sky130::res_dialog mrm3 $parameters
+}
+
+#ifdef METAL5
+proc sky130::mrm4_dialog {parameters} {
+    sky130::res_dialog mrm4 $parameters
+}
+proc sky130::mrm5_dialog {parameters} {
+    sky130::res_dialog mrm5 $parameters
+}
+#endif (METAL5)
+
+#----------------------------------------------------------------
+# Resistor: Draw a single device in straight geometry
+#----------------------------------------------------------------
+
+proc sky130::res_device {parameters} {
+    # Epsilon for avoiding round-off errors
+    set eps  0.0005
+
+    # Set local default values if they are not in parameters
+    set endcov 0	 	;# percent coverage of end contacts
+    set roverlap 0		;# overlap resistors at end contacts
+    set well_res_overlap 0 	;# not a well resistor
+    set end_contact_type ""	;# no contacts for metal resistors
+    set end_overlap_cont 0	;# additional end overlap on sides
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    if {![dict exists $parameters end_contact_size]} {
+	set end_contact_size $contact_size
+    }
+
+    # Draw the resistor and endcaps
+    pushbox
+    box size 0 0
+    pushbox
+    set hw [/ $w 2.0]
+    set hl [/ $l 2.0]
+    box grow n ${hl}um
+    box grow s ${hl}um
+    box grow e ${hw}um
+    box grow w ${hw}um
+
+    pushbox
+    box grow n ${res_to_endcont}um
+    box grow s ${res_to_endcont}um
+    if {$well_res_overlap > 0} {
+	set well_extend [+ ${well_res_overlap} [/ ${end_contact_size} 2.0] ${end_surround}]
+	box grow n ${well_extend}um
+	box grow s ${well_extend}um
+	paint ${well_res_type}
+    } else {
+	paint ${end_type}
+    }
+    set cext [sky130::getbox]
+    popbox
+
+    if {$well_res_overlap > 0} {
+	erase ${well_res_type}
+    } else {
+	erase ${end_type}
+    }
+    paint ${res_type}
+    popbox
+
+    # Reduce contact sizes by (end type) surround so that
+    # the contact area edges match the device type width.
+    # (Minimum dimensions will be enforced by the contact drawing routine)
+    set epl [- ${w} [* ${end_surround} 2]]     	    ;# end contact width
+
+    # Reduce end material size for well resistor types
+    if {$well_res_overlap > 0} {
+	set epl [- ${epl} [* ${well_res_overlap} 2]]
+    }
+
+    # Reduce by coverage percentage unless overlapping at contacts
+    if {(${roverlap} == 0) && (${endcov} > 0)} {
+	set cpl [* ${epl} [/ ${endcov} 100.0]]
+    } else {
+	set cpl $epl
+    }
+
+    # Ensure additional overlap of diffusion contact if required
+    set dov [* ${end_overlap_cont} 2]
+    if {[- ${epl} ${cpl}] < $dov} {
+	set cpl [- ${epl} $dov]    ;# additional end contact width
+    }
+
+    set hepl [+ [/ ${epl} 2.0] ${end_surround}]
+    set hesz [/ ${end_contact_size} 2.0]
+
+    # LV substrate diffusion types have a different surround requirement
+    set lv_sub_types {"psd" "nsd"}
+    if {[lsearch $lv_sub_types $end_type] < 0} {
+	set hesz [+ ${hesz} ${end_surround}]
+    }
+
+    # Top end material & contact
+    pushbox
+    box move n ${hl}um
+    box move n ${res_to_endcont}um
+
+    pushbox
+    box size 0 0
+    box grow n ${hesz}um
+    box grow s ${hesz}um
+    box grow e ${hepl}um
+    box grow w ${hepl}um
+    paint ${end_type}
+    set cext [sky130::unionbox $cext [sky130::getbox]]
+    popbox
+
+    if {${end_contact_type} != ""} {
+	set cext [sky130::unionbox $cext [sky130::draw_contact ${cpl} 0 \
+		${end_surround} ${metal_surround} ${end_contact_size} \
+		${end_type} ${end_contact_type} li horz]]
+    }
+    popbox
+
+    # Bottom end material & contact
+    pushbox
+    box move s ${hl}um
+    box move s ${res_to_endcont}um
+
+    pushbox
+    box size 0 0
+    box grow n ${hesz}um
+    box grow s ${hesz}um
+    box grow e ${hepl}um
+    box grow w ${hepl}um
+    paint ${end_type}
+    set cext [sky130::unionbox $cext [sky130::getbox]]
+    popbox
+
+    if {${end_contact_type} != ""} {
+	set cext [sky130::unionbox $cext [sky130::draw_contact ${cpl} 0 \
+		${end_surround} ${metal_surround} ${end_contact_size} \
+		${end_type} ${end_contact_type} li horz]]
+    }
+    popbox
+
+    popbox
+    return $cext
+}
+
+#----------------------------------------------------------------
+# Resistor: Draw a single device in snake geometry
+#----------------------------------------------------------------
+
+proc sky130::res_snake_device {nf parameters} {
+    # nf is the number of fingers of the snake geometry
+
+    # Epsilon for avoiding round-off errors
+    set eps  0.0005
+
+    # Set local default values if they are not in parameters
+    set endcov 100	 	;# percent coverage of end contacts
+    set well_res_overlap 0 	;# not a well resistor
+    set end_contact_type ""	;# no contacts for metal resistors
+    set mask_clearance 0	;# additional length to clear mask
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    if {![dict exists $parameters end_contact_size]} {
+	set end_contact_size $contact_size
+    }
+
+    # Compute half width and length
+    set hw [/ $w 2.0]
+    set hl [/ $l 2.0]
+
+    # Reduce contact sizes by (end type) surround so that
+    # the contact area edges match the device type width.
+    # (Minimum dimensions will be enforced by the contact drawing routine)
+    set epl [- ${w} [* ${end_surround} 2]]     	    ;# end contact width
+
+    # Reduce contact size for well resistor types
+    if {$well_res_overlap > 0} {
+	set epl [- ${epl} [* ${well_res_overlap} 2]]
+    }
+
+    # Reduce contact part of end by coverage percentage
+    if {${endcov} > 0} {
+	set cpl [* ${epl} [/ ${endcov} 100.0]]
+    } else {
+	set cpl $epl
+    }
+
+    set hepl [+ [/ ${epl} 2.0] ${end_surround}]
+    set hesz [+ [/ ${end_contact_size} 2.0] ${end_surround}]
+
+    pushbox
+    box size 0 0	;# Position is taken from caller
+
+    # Front end contact (always bottom)
+    pushbox
+    box move s ${hl}um
+    pushbox
+    box move s ${mask_clearance}um
+    box move s ${res_to_endcont}um
+
+    pushbox
+    box size 0 0
+    box grow n ${hesz}um
+    box grow s ${hesz}um
+    box grow e ${hepl}um
+    box grow w ${hepl}um
+    paint ${end_type}
+    set cext [sky130::getbox]
+    popbox
+
+    if {${end_contact_type} != ""} {
+	set cext [sky130::draw_contact ${cpl} 0 \
+		${end_surround} ${metal_surround} ${end_contact_size} \
+		${end_type} ${end_contact_type} li horz]
+    }
+    popbox
+
+    # Draw portion between resistor end and contact.
+    box grow e ${hw}um
+    box grow w ${hw}um
+    pushbox
+    box grow s ${mask_clearance}um
+    paint ${res_type}
+    popbox
+    box move s ${mask_clearance}um
+    box grow s ${res_to_endcont}um
+    if {$well_res_overlap > 0} {
+	set well_extend [+ ${well_res_overlap} [/ ${end_contact_size} 2.0] ${end_surround}]
+	box grow s ${well_extend}um
+	paint ${well_res_type}
+    } else {
+	paint ${end_type}
+    }
+    set cext [sky130::unionbox $cext [sky130::getbox]]
+    popbox
+
+    # Draw the resistor and endcaps
+    pushbox
+    box grow n ${hl}um
+    box grow s ${hl}um
+    box grow e ${hw}um
+    box grow w ${hw}um
+
+    # Capture these extents in the bounding box in case both contacts
+    # are on one side.
+    set cext [sky130::unionbox $cext [sky130::getbox]]
+
+    set deltax [+ ${res_spacing} ${w}]
+    set deltay [- ${l} ${w}]
+    for {set i 0} {$i < [- $nf 1]} {incr i} {
+	paint ${res_type}
+ 	pushbox
+	if {[% $i 2] == 0} {
+	    box move n ${deltay}um
+	}
+	box height ${w}um
+	box width ${deltax}um
+	paint ${res_type}
+ 	popbox
+	box move e ${deltax}um
+    }
+    paint ${res_type}
+    # Capture these extents in the bounding box
+    set cext [sky130::unionbox $cext [sky130::getbox]]
+    popbox
+
+    # Move box to last finger
+    set lastf [* [- $nf 1] $deltax]
+    box move e ${lastf}um
+
+    # Back-end contact (top or bottom, depending if odd or even turns)
+    pushbox
+
+    if {[% $nf 2] == 1} {
+	set dir n
+    } else {
+	set dir s
+    }
+    box move $dir ${hl}um
+    pushbox
+    box move $dir ${mask_clearance}um
+    box move $dir ${res_to_endcont}um
+
+    pushbox
+    box size 0 0
+    box grow n ${hesz}um
+    box grow s ${hesz}um
+    box grow e ${hepl}um
+    box grow w ${hepl}um
+    paint ${end_type}
+    set cext [sky130::unionbox $cext [sky130::getbox]]
+    popbox
+
+    if {${end_contact_type} != ""} {
+	set cext [sky130::unionbox $cext [sky130::draw_contact ${cpl} 0 \
+		${end_surround} ${metal_surround} ${end_contact_size} \
+		${end_type} ${end_contact_type} li horz]]
+    }
+    popbox
+    # Draw portion between resistor end and contact.
+    box grow e ${hw}um
+    box grow w ${hw}um
+    pushbox
+    box grow $dir ${mask_clearance}um
+    paint ${res_type}
+    popbox
+    box move $dir ${mask_clearance}um
+    box grow $dir ${res_to_endcont}um
+
+    if {$well_res_overlap > 0} {
+	set well_extend [+ ${well_res_overlap} [/ ${end_contact_size} 2.0] ${end_surround}]
+	box grow $dir ${well_extend}um
+	paint ${well_res_type}
+    } else {
+	paint ${end_type}
+    }
+    popbox
+
+    popbox
+    return $cext
+}
+
+#----------------------------------------------------------------
+# Resistor: Draw the tiled device
+#----------------------------------------------------------------
+
+proc sky130::res_draw {parameters} {
+    tech unlock *
+    set savesnap [snap]
+    snap internal
+
+    # Set defaults if they are not in parameters
+    set snake 0		;# some resistors don't allow snake geometry
+    set roverlap 0	;# overlap resistors at contacts
+    set guard 1		;# draw a guard ring
+    set plus_diff_type   nsd	;# guard ring diffusion type
+    set overlap_compress 0	;# special Y distance compression
+    set well_res_overlap 0	;# additional well extension behind contact
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # For devices where inter-device space is smaller than device-to-guard ring
+    if {![dict exists $parameters end_to_end_space]} {
+	set end_to_end_space $end_spacing
+    }
+
+    if {![dict exists $parameters end_contact_size]} {
+	set end_contact_size $contact_size
+    }
+
+    # Normalize distance units to microns
+    set w [magic::spice2float $w]
+    set l [magic::spice2float $l]
+
+    pushbox
+    box values 0 0 0 0
+
+    # Determine the base device dimensions by drawing one device
+    # while all layers are locked (nothing drawn).  This allows the
+    # base drawing routine to do complicated geometry without having
+    # to duplicate it here with calculations.
+
+    tech lock *
+    set nf $nx
+    if {($snake == 1) && ($nx == 1)} {set snake 0}
+    if {$snake == 1} {
+	set bbox [sky130::res_snake_device $nf $parameters]
+	set nx 1
+    } else {
+	set bbox [sky130::res_device $parameters]
+    }
+    # puts stdout "Diagnostic: Device bounding box e $bbox (um)"
+    tech unlock *
+
+    set fw [- [lindex $bbox 2] [lindex $bbox 0]]
+    set fh [- [lindex $bbox 3] [lindex $bbox 1]]
+    set lw [+ [lindex $bbox 2] [lindex $bbox 0]]
+    set lh [+ [lindex $bbox 3] [lindex $bbox 1]]
+
+    # Determine tile width and height (depends on overlap)
+    # Snake resistors cannot overlap.
+    # However, snake resistors with an odd number of fingers can
+    # compress the space if overlap_compress is defined
+
+    if {($roverlap == 1) && ($snake == 1) && ([% $nf 2] == 1) && ($m > 1)} {
+        set dy [- $fh $overlap_compress]
+    } elseif {($roverlap == 0) || ($snake == 1)} {
+        set dy [+ $fh $end_to_end_space]
+    } else {
+        # overlap poly
+        set dy [- $fh [+ [* [+ $end_surround $well_res_overlap] 2.0] $end_contact_size]]
+    }
+    set dx [+ $fw $res_spacing]
+
+    # Determine core width and height
+    set corex [+ [* [- $nx 1] $dx] $fw]
+    set corey [+ [* [- $m 1] $dy] $fh]
+    set corellx [/ [+ [- $corex $fw] $lw] 2.0]
+    set corelly [/ [+ [- $corey $fh] $lh] 2.0]
+
+    set lv_sub_types {"psd" "nsd"}
+    if {[lsearch $lv_sub_types $plus_diff_type] >= 0} {
+	set guard_diff_surround 0
+    } else {
+	set guard_diff_surround ${diff_surround}
+    }
+
+    if {$guard != 0} {
+	# Calculate guard ring size (measured to contact center)
+	set gx [+ $corex [* 2.0 [+ $res_diff_spacing $guard_diff_surround]] $contact_size]
+	set gy [+ $corey [* 2.0 [+ $end_spacing $guard_diff_surround]] $contact_size]
+
+	# Draw the guard ring first, because well resistors are on the substrate plane
+	sky130::guard_ring $gx $gy $parameters
+    }
+
+    pushbox
+    box move w ${corellx}um
+    box move s ${corelly}um
+    # puts "Device position at = [sky130::getbox]"
+    for {set xp 0} {$xp < $nx} {incr xp} {
+	pushbox
+	for {set yp 0} {$yp < $m} {incr yp} {
+	    if {$snake == 1} {
+		sky130::res_snake_device $nf $parameters
+	    } else {
+		sky130::res_device $parameters
+	    }
+            box move n ${dy}um
+        }
+	popbox
+        box move e ${dx}um
+    }
+    popbox
+    popbox
+
+    snap $savesnap
+    tech revert
+}
+
+#----------------------------------------------------------------
+
+proc sky130::mrp1_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    res_type		npres \
+	    end_type 		poly \
+	    end_contact_type	pc \
+	    plus_diff_type	nsd \
+	    plus_contact_type	nsc \
+	    sub_type		nwell \
+	    end_surround	$poly_surround \
+	    end_spacing		0.48 \
+	    end_to_end_space	0.52 \
+	    res_to_endcont	$res_to_cont \
+	    res_spacing		$poly_spacing \
+	    res_diff_spacing	0.48 \
+	    mask_clearance	0.52 \
+	    overlap_compress	0.36 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::xhrpoly_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    res_type		ppres \
+	    end_type 		xpc \
+	    end_contact_type	xpc \
+	    end_contact_size	0 \
+	    plus_diff_type	psd \
+	    plus_contact_type	psc \
+	    sub_type		psub \
+	    end_surround	$poly_surround \
+	    end_spacing		0.48 \
+	    end_to_end_space	0.52 \
+	    end_contact_size	0.19 \
+	    res_to_endcont	1.985 \
+	    res_spacing		1.24 \
+	    res_diff_spacing	0.48 \
+	    mask_clearance	0.52 \
+	    overlap_compress	0.36 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::uhrpoly_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    res_type		xpres \
+	    end_type 		xpc \
+	    end_contact_type	xpc \
+	    end_contact_size	0 \
+	    plus_diff_type	psd \
+	    plus_contact_type	psc \
+	    sub_type		psub \
+	    end_surround	$poly_surround \
+	    end_spacing		0.48 \
+	    end_to_end_space	0.52 \
+	    end_contact_size	0.19 \
+	    res_to_endcont	1.985 \
+	    res_spacing		1.24 \
+	    res_diff_spacing	0.48 \
+	    mask_clearance	0.52 \
+	    overlap_compress	0.36 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::mrdn_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    res_type		rdn \
+	    end_type 		ndiff \
+	    end_contact_type	ndc \
+	    plus_diff_type	psd \
+	    plus_contact_type	psc \
+	    sub_type		psub \
+	    end_surround	$diff_surround \
+	    end_spacing		0.44 \
+	    res_to_endcont	0.37 \
+	    res_spacing		0.30 \
+	    res_diff_spacing	0.44 \
+	    mask_clearance	0.22 \
+	    overlap_compress	0.36 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::mrdn_hv_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    res_type		mvrdn \
+	    end_type 		mvndiff \
+	    end_contact_type	mvndc \
+	    plus_diff_type	mvpsd \
+	    plus_contact_type	mvpsc \
+	    sub_type		psub \
+	    end_surround	$diff_surround \
+	    end_spacing		0.44 \
+	    res_to_endcont	0.37 \
+	    res_spacing		0.30 \
+	    res_diff_spacing	0.44 \
+	    mask_clearance	0.22 \
+	    overlap_compress	0.36 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::mrdp_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    res_type		rdp \
+	    end_type 		pdiff \
+	    end_contact_type	pdc \
+	    plus_diff_type	nsd \
+	    plus_contact_type	nsc \
+	    sub_type		nwell \
+	    end_surround	$diff_surround \
+	    end_spacing		0.44 \
+	    res_to_endcont	0.37 \
+	    res_spacing		$diff_spacing \
+	    res_diff_spacing	0.44 \
+	    mask_clearance	0.22 \
+	    overlap_compress	0.36 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::mrdp_hv_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    res_type		mvrdp \
+	    end_type 		mvpdiff \
+	    end_contact_type	mvpdc \
+	    plus_diff_type	mvnsd \
+	    plus_contact_type	mvnsc \
+	    sub_type		nwell \
+	    end_surround	$diff_surround \
+	    guard_sub_surround	0.33 \
+	    end_spacing		0.44 \
+	    res_to_endcont	0.37 \
+	    res_spacing		0.30 \
+	    res_diff_spacing	0.44 \
+	    mask_clearance	0.22 \
+	    overlap_compress	0.36 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::xpwres_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    well_res_type	pwell \
+	    res_type		rpw \
+	    end_type 		psd \
+	    end_contact_type	psc \
+	    plus_diff_type	nsd \
+	    plus_contact_type	nsc \
+	    sub_type		dnwell \
+	    sub_surround	0.23 \
+	    guard_sub_type	nwell \
+	    guard_sub_surround	0.63 \
+	    end_surround	$diff_surround \
+	    end_spacing		0.63 \
+	    end_to_end_space	1.15 \
+	    end_overlap_cont	0.06 \
+	    end_contact_size	0.53 \
+	    overlap_compress	-0.17 \
+	    res_to_endcont	0.265 \
+	    res_spacing		1.4 \
+	    res_diff_spacing	0.63 \
+	    well_res_overlap	0.2 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::mrl1_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    guard		0 \
+	    res_type		rli \
+	    end_type 		li \
+	    end_surround	0.0 \
+	    end_spacing		0.0 \
+	    res_to_endcont	0.2 \
+	    end_to_end_space	0.23 \
+	    res_spacing		$metal_spacing \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::mrm1_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    guard		0 \
+	    res_type		rm1 \
+	    end_type 		m1 \
+	    end_surround	0.0 \
+	    end_spacing		0.0 \
+	    end_to_end_space	0.28 \
+	    res_to_endcont	0.2 \
+	    res_spacing		$mmetal_spacing \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::mrm2_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    guard		0 \
+	    res_type		rm2 \
+	    end_type 		m2 \
+	    end_surround	0.0 \
+	    end_spacing		0.0 \
+	    end_to_end_space	0.28 \
+	    res_to_endcont	0.2 \
+	    res_spacing		$mmetal_spacing \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+proc sky130::mrm3_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    guard		0 \
+	    res_type		rm3 \
+	    end_type 		m3 \
+	    end_surround	0.0 \
+	    end_spacing		0.0 \
+	    end_to_end_space	0.28 \
+	    res_to_endcont	0.2 \
+	    res_spacing		$mmetal_spacing \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+
+#ifdef METAL5
+proc sky130::mrm4_draw {parameters} {
+
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    guard		0 \
+	    res_type		rm4 \
+	    end_type 		m4 \
+	    end_surround	0.0 \
+	    end_spacing		0.0 \
+	    end_to_end_space	0.28 \
+	    res_to_endcont	0.2 \
+	    res_spacing		$mmetal_spacing \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+
+proc sky130::mrm5_draw {parameters} {
+    # Set a local variable for each rule in ruleset
+    foreach key [dict keys $sky130::ruleset] {
+        set $key [dict get $sky130::ruleset $key]
+    }
+
+    set newdict [dict create \
+	    guard		0 \
+	    res_type		rm5 \
+	    end_type 		m5 \
+	    end_surround	0.0 \
+	    end_spacing		0.0 \
+	    end_to_end_space	1.6 \
+	    res_to_endcont	0.2 \
+	    res_spacing		$mmetal_spacing \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::res_draw $drawdict]
+}
+#endif (METAL5)
+
+#----------------------------------------------------------------
+# Resistor total length computation
+#----------------------------------------------------------------
+
+proc sky130::compute_ltot {parameters} {
+    # In case snake not defined
+    set snake 0
+    set caplen 0
+
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    set l [magic::spice2float $l]
+    set l [magic::3digitpastdecimal $l]
+
+    # Compute total length.  Use catch to prevent error in batch/scripted mode.
+    if {$snake == 1} {
+	catch {set magic::ltot_val [expr ($caplen * ($nx - 1)) + ($l * $nx) + ($nx - 1)]}
+    } else {
+	catch {set magic::ltot_val $l}
+    }
+}
+
+#----------------------------------------------------------------
+# resistor: Check device parameters for out-of-bounds values
+#----------------------------------------------------------------
+
+proc sky130::res_check {device parameters} {
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    set snake 0
+    set sterm 0.0
+    set caplen 0
+
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # Normalize distance units to microns
+    set w [magic::spice2float $w]
+    set w [magic::3digitpastdecimal $w]
+    set l [magic::spice2float $l]
+    set l [magic::3digitpastdecimal $l]
+
+    set val  [magic::spice2float $val]
+    set rho  [magic::spice2float $rho]
+
+    # nf, m must be integer
+    if {![string is int $nx]} {
+	puts stderr "X repeat must be an integer!"
+        dict set parameters nx 1
+    }
+    if {![string is int $m]} {
+	puts stderr "Y repeat must be an integer!"
+        dict set parameters m 1
+    }
+
+    # Width always needs to be specified
+    if {$w < $wmin} {
+	puts stderr "Resistor width must be >= $wmin um"
+	dict set parameters w $wmin
+    } 
+    # Val and W specified - no L
+    if {$l == 0}  {
+   	set l [expr ($w - $dw) * $val / $rho]
+        set l [magic::3digitpastdecimal $l]
+        set stringval [magic::float2spice $val]
+	dict set parameters l [magic::float2spice [expr $l * 1e-6]]
+	# L and W specified - ignore Val if specified
+    } else {
+	if {$snake == 0} {
+	    set val [expr (2 * $term + $l * $rho) / ($w - $dw)]
+	} else {
+	    set val [expr $rho * ($nx - 1) + ((2 * ($term + $sterm)) \
+			+ ($rho * $l * $nx) + ($rho * $caplen * ($nx - 1))) \
+			/ ($w - $dw)]
+	}
+	set val [magic::float2spice $val]
+        dict set parameters val $val
+    }
+    if {$l < $lmin} {
+	puts stderr "Resistor length must be >= $lmin um"
+	dict set parameters l $lmin
+    } 
+    if {$nx < 1} {
+	puts stderr "X repeat must be >= 1"
+	dict set parameters nx 1
+    } 
+    if {$m < 1} {
+	puts stderr "Y repeat must be >= 1"
+	dict set parameters m 1
+    } 
+
+    # Snake resistors cannot have width greater than length
+    if {$snake == 1} {
+	if {$w > $l} {
+	    puts stderr "Snake resistor width must be < length"
+	    dict set parameters w $l
+	}
+    }
+
+    # Diffusion resistors must satisfy diffusion-to-tap spacing of 20um.
+    # Therefore the maximum of guard ring width or height cannot exceed 40um.
+    # If in violation, reduce counts first, as these are easiest to recover
+    # by duplicating the device and overlapping the wells.
+    if {$device == "rdn" || $device == "rdp"} {
+       set origm $m
+       set orignx $nx
+       while true {
+	  set xext [expr ($w + 0.8) * $nx + 1.0]
+	  set yext [expr ($l + 1.7) * $m + 1.7]
+          if {[expr min($xext, $yext)] > 40.0} {
+              if {$yext > 40.0 && $m > 1} {
+		 incr m -1
+	      } elseif {$xext > 40.0 && $nx > 1} {
+		 incr nx -1
+	      } elseif {$yext > 40.0} {
+		 set l 36.6
+		 puts -nonewline stderr "Diffusion resistor length must be < 36.6 um"
+		 puts stderr " to avoid tap spacing violation."
+		 dict set parameters l $l
+	      } elseif {$xext > 40.0} {
+		 set w 38.2
+		 puts -nonewline stderr "Diffusion resistor width must be < 38.2 um"
+		 puts stderr " to avoid tap spacing violation."
+		 dict set parameters w $w
+	      }
+          } else {
+	      break
+	  }
+       }
+       if {$m != $origm} {
+	  puts stderr "Y repeat reduced to prevent tap distance violation"
+	  dict set parameters m $m
+       }
+       if {$nx != $orignx} {
+	  puts stderr "X repeat reduced to prevent tap distance violation"
+	  dict set parameters nx $nx
+       }
+    }
+    sky130::compute_ltot $parameters
+    return $parameters
+}
+
+#----------------------------------------------------------------
+
+proc sky130::xpwres_check {parameters} {
+    return [sky130::res_check xpwres $parameters]
+}
+
+proc sky130::mrp1_check {parameters} {
+    return [sky130::res_check mrp1 $parameters]
+}
+
+proc sky130::xhrpoly_check {parameters} {
+    return [sky130::res_check xhrpoly $parameters]
+}
+
+proc sky130::uhrpoly_check {parameters} {
+    return [sky130::res_check uhrpoly $parameters]
+}
+
+proc sky130::mrdn_check {parameters} {
+    return [sky130::res_check mrdn $parameters]
+}
+
+proc sky130::mrdp_check {parameters} {
+    return [sky130::res_check mrdp $parameters]
+}
+
+proc sky130::mrdn_hv_check {parameters} {
+    return [sky130::res_check mrdn_hv $parameters]
+}
+
+proc sky130::mrdp_hv_check {parameters} {
+    return [sky130::res_check mrdp_hv $parameters]
+}
+
+proc sky130::mrl1_check {parameters} {
+    return [sky130::res_check mrl1 $parameters]
+}
+
+proc sky130::mrm1_check {parameters} {
+    return [sky130::res_check mrm1 $parameters]
+}
+
+proc sky130::mrm2_check {parameters} {
+    return [sky130::res_check mrm2 $parameters]
+}
+
+proc sky130::mrm3_check {parameters} {
+    return [sky130::res_check mrm3 $parameters]
+}
+
+#ifdef METAL5
+proc sky130::mrm4_check {parameters} {
+    return [sky130::res_check mrm4 $parameters]
+}
+proc sky130::mrm5_check {parameters} {
+    return [sky130::res_check mrm5 $parameters]
+}
+#endif (METAL5)
+
+#----------------------------------------------------------------
+# MOS defaults:
+#----------------------------------------------------------------
+#    w       = Gate width
+#    l       = Gate length
+#    m	     = Multiplier
+#    nf	     = Number of fingers
+#    diffcov = Diffusion contact coverage
+#    polycov = Poly contact coverage
+#    topc    = Top gate contact
+#    botc    = Bottom gate contact
+#    guard   = Guard ring
+#
+# (not user-editable)
+#
+#    lmin    = Gate minimum length
+#    wmin    = Gate minimum width
+#----------------------------------------------------------------
+
+#----------------------------------------------------------------
+# pmos: Specify all user-editable default values and those
+# needed by mos_check
+#----------------------------------------------------------------
+
+proc sky130::pshort_defaults {} {
+    return {w 0.42 l 0.15 m 1 nf 1 diffcov 100 polycov 100 \
+		guard 1 glc 1 grc 1 gtc 1 gbc 1 tbcov 100 rlcov 100 \
+		topc 1 botc 1 poverlap 0 doverlap 1 lmin 0.15 wmin 0.42 \
+		compatible {pshort plowvt phighvt phv} full_metal 1}
+}
+
+proc sky130::plowvt_defaults {} {
+    return {w 0.42 l 0.35 m 1 nf 1 diffcov 100 polycov 100 \
+		guard 1 glc 1 grc 1 gtc 1 gbc 1 tbcov 100 rlcov 100 \
+		topc 1 botc 1 poverlap 0 doverlap 1 lmin 0.35 wmin 0.42 \
+		compatible {pshort plowvt phighvt phv} full_metal 1}
+}
+
+proc sky130::phighvt_defaults {} {
+    return {w 0.42 l 0.15 m 1 nf 1 diffcov 100 polycov 100 \
+		guard 1 glc 1 grc 1 gtc 1 gbc 1 tbcov 100 rlcov 100 \
+		topc 1 botc 1 poverlap 0 doverlap 1 lmin 0.15 wmin 0.42 \
+		compatible {pshort plowvt phighvt phv} full_metal 1}
+}
+
+proc sky130::phv_defaults {} {
+    return {w 0.42 l 0.50 m 1 nf 1 diffcov 100 polycov 100 \
+		guard 1 glc 1 grc 1 gtc 1 gbc 1 tbcov 100 rlcov 100 \
+		topc 1 botc 1 poverlap 0 doverlap 1 lmin 0.50 wmin 0.42 \
+		compatible {pshort plowvt phighvt phv} full_metal 1}
+}
+
+#----------------------------------------------------------------
+# nmos: Specify all user-editable default values and those
+# needed by mos_check
+#----------------------------------------------------------------
+
+proc sky130::nshort_defaults {} {
+    return {w 0.420 l 0.150 m 1 nf 1 diffcov 100 polycov 100 \
+		guard 1 glc 1 grc 1 gtc 1 gbc 1 tbcov 100 rlcov 100 \
+		topc 1 botc 1 poverlap 0 doverlap 1 lmin 0.15 wmin 0.42 \
+		compatible {nshort nlowvt sonos_e nhv nhvnative} full_metal 1}
+}
+
+proc sky130::nlowvt_defaults {} {
+    return {w 0.420 l 0.150 m 1 nf 1 diffcov 100 polycov 100 \
+		guard 1 glc 1 grc 1 gtc 1 gbc 1 tbcov 100 rlcov 100 \
+		topc 1 botc 1 poverlap 0 doverlap 1 lmin 0.15 wmin 0.42 \
+		compatible {nshort nlowvt sonos_e nhv nhvnative} full_metal 1}
+}
+
+proc sky130::sonos_e_defaults {} {
+    return {w 0.420 l 0.150 m 1 nf 1 diffcov 100 polycov 100 \
+		guard 1 glc 1 grc 1 gtc 1 gbc 1 tbcov 100 rlcov 100 \
+		topc 1 botc 1 poverlap 0 doverlap 1 lmin 0.15 wmin 0.42 \
+		compatible {nshort nlowvt sonos_e nhv nhvnative} full_metal 1}
+}
+
+proc sky130::nhv_defaults {} {
+    return {w 0.42 l 0.50 m 1 nf 1 diffcov 100 polycov 100 \
+		guard 1 glc 1 grc 1 gtc 1 gbc 1 tbcov 100 rlcov 100 \
+		topc 1 botc 1 poverlap 0 doverlap 1 lmin 0.50 wmin 0.42 \
+		compatible {nshort nlowvt sonos_e nhv nhvnative} full_metal 1}
+}
+
+proc sky130::nhvnative_defaults {} {
+    return {w 0.42 l 0.50 m 1 nf 1 diffcov 100 polycov 100 \
+		guard 1 glc 1 grc 1 gtc 1 gbc 1 tbcov 100 rlcov 100 \
+		topc 1 botc 1 poverlap 0 doverlap 1 lmin 0.50 wmin 0.42 \
+		compatible {nshort nlowvt sonos_e nhv nhvnative} full_metal 1}
+}
+
+#----------------------------------------------------------------
+# mos varactor: Specify all user-editable default values and those
+# needed by mosvc_check
+#----------------------------------------------------------------
+
+proc sky130::xcnwvc_defaults {} {
+    return {w 1.0 l 0.18 m 1 nf 1 diffcov 100 polycov 100 \
+		guard 1 glc 1 grc 1 gtc 1 gbc 1 tbcov 100 rlcov 100 \
+		topc 1 botc 1 poverlap 0 doverlap 1 lmin 0.18 wmin 1.0 \
+		compatible {xcnwvc xcnwvc2 xchvnwc} full_metal 1}
+}
+
+proc sky130::xcnwvc2_defaults {} {
+    return {w 1.0 l 0.18 m 1 nf 1 diffcov 100 polycov 100 \
+		guard 1 glc 1 grc 1 gtc 1 gbc 1 tbcov 100 rlcov 100 \
+		topc 1 botc 1 poverlap 0 doverlap 1 lmin 0.18 wmin 1.0 \
+		compatible {xcnwvc xcnwvc2 xchvnwc} full_metal 1}
+}
+
+proc sky130::xchvnwc_defaults {} {
+    return {w 1.0 l 0.50 m 1 nf 1 diffcov 100 polycov 100 \
+		guard 1 glc 1 grc 1 gtc 1 gbc 1 tbcov 100 rlcov 100 \
+		topc 1 botc 1 poverlap 0 doverlap 1 lmin 0.50 wmin 1.0 \
+		compatible {xcnwvc xcnwvc2 xchvnwc} full_metal 1}
+}
+
+#----------------------------------------------------------------
+# mos: Conversion from SPICE netlist parameters to toolkit
+#----------------------------------------------------------------
+
+proc sky130::mos_convert {parameters} {
+    set pdkparams [dict create]
+    dict for {key value} $parameters {
+	switch -nocase $key {
+	    l -
+	    w {
+		# Length and width are converted to units of microns
+		set value [magic::spice2float $value]
+		# set value [expr $value * 1e6]
+		set value [magic::3digitpastdecimal $value]
+		dict set pdkparams [string tolower $key] $value
+	    }
+	    m {
+		# M value in an expression like '1*1' convert to
+		# M and NF
+		if {[regexp {\'([0-9]+)\*([0-9]+)\'} $value valid m nf]} {
+		    dict set pdkparams [string tolower $key] $m
+		    dict set pdkparams nf $nf
+		} else {
+		    dict set pdkparams [string tolower $key] $value
+		}
+	    }
+	}
+    }
+    return $pdkparams
+}
+
+#----------------------------------------------------------------
+
+proc sky130::nshort_convert {parameters} {
+    return [sky130::mos_convert $parameters]
+}
+
+proc sky130::nlowvt_convert {parameters} {
+    return [sky130::mos_convert $parameters]
+}
+
+proc sky130::sonos_e_convert {parameters} {
+    return [sky130::mos_convert $parameters]
+}
+
+proc sky130::nhv_convert {parameters} {
+    return [sky130::mos_convert $parameters]
+}
+
+proc sky130::nhvnative_convert {parameters} {
+    return [sky130::mos_convert $parameters]
+}
+
+proc sky130::pshort_convert {parameters} {
+    return [sky130::mos_convert $parameters]
+}
+
+proc sky130::plowvt_convert {parameters} {
+    return [sky130::mos_convert $parameters]
+}
+
+proc sky130::phighvt_convert {parameters} {
+    return [sky130::mos_convert $parameters]
+}
+
+proc sky130::phv_convert {parameters} {
+    return [sky130::mos_convert $parameters]
+}
+
+proc sky130::xcnwvc_convert {parameters} {
+    return [sky130::mos_convert $parameters]
+}
+
+proc sky130::xcnwvc2_convert {parameters} {
+    return [sky130::mos_convert $parameters]
+}
+
+proc sky130::xchvnwc_convert {parameters} {
+    return [sky130::mos_convert $parameters]
+}
+
+#----------------------------------------------------------------
+# mos: Interactively specifies the fixed layout parameters
+#----------------------------------------------------------------
+
+proc sky130::mos_dialog {device parameters} {
+    # Editable fields:      w, l, nf, m, diffcov, polycov
+    # Checked fields:  topc, botc
+    # For specific devices, gate type is a selection list
+
+    magic::add_entry w "Width (um)" $parameters
+    magic::add_entry l "Length (um)" $parameters
+    magic::add_entry nf "Fingers" $parameters
+    magic::add_entry m "M" $parameters
+
+    if {[dict exists $parameters compatible]} {
+       set sellist [dict get $parameters compatible]
+       magic::add_selectlist gencell "Device type" $sellist $parameters $device
+    }
+
+    magic::add_entry diffcov "Diffusion contact coverage (%)" $parameters
+    magic::add_entry polycov "Poly contact coverage (%)" $parameters
+    magic::add_entry rlcov "Guard ring contact coverage (%)" $parameters
+    if {[dict exists $parameters gbc]} {
+	magic::add_entry tbcov "Guard ring top/bottom contact coverage (%)" $parameters
+    }
+
+    magic::add_checkbox poverlap "Overlap at poly contact" $parameters
+    magic::add_checkbox doverlap "Overlap at diffusion contact" $parameters
+    magic::add_checkbox topc "Add top gate contact" $parameters
+    magic::add_checkbox botc "Add bottom gate contact" $parameters
+
+    magic::add_checkbox guard "Add guard ring" $parameters
+    magic::add_checkbox full_metal "Full metal guard ring" $parameters
+    magic::add_checkbox glc "Add left guard ring contact" $parameters
+    magic::add_checkbox grc "Add right guard ring contact" $parameters
+    if {[dict exists $parameters gbc]} {
+	magic::add_checkbox gbc "Add bottom guard ring contact" $parameters
+    }
+    if {[dict exists $parameters gtc]} {
+	magic::add_checkbox gtc "Add top guard ring contact" $parameters
+    }
+}
+
+#----------------------------------------------------------------
+
+proc sky130::nshort_dialog {parameters} {
+    sky130::mos_dialog nshort $parameters
+}
+
+proc sky130::nlowvt_dialog {parameters} {
+    sky130::mos_dialog nlowvt $parameters
+}
+
+proc sky130::sonos_e_dialog {parameters} {
+    sky130::mos_dialog sonos_e $parameters
+}
+
+proc sky130::nhv_dialog {parameters} {
+    sky130::mos_dialog nhv $parameters
+}
+
+proc sky130::nhvnative_dialog {parameters} {
+    sky130::mos_dialog nhvnative $parameters
+}
+
+proc sky130::pshort_dialog {parameters} {
+    sky130::mos_dialog pshort $parameters
+}
+
+proc sky130::plowvt_dialog {parameters} {
+    sky130::mos_dialog plowvt $parameters
+}
+
+proc sky130::phighvt_dialog {parameters} {
+    sky130::mos_dialog phighvt $parameters
+}
+
+proc sky130::phv_dialog {parameters} {
+    sky130::mos_dialog phv $parameters
+}
+
+proc sky130::xcnwvc_dialog {parameters} {
+    sky130::mos_dialog xcnwvc $parameters
+}
+
+proc sky130::xcnwvc2_dialog {parameters} {
+    sky130::mos_dialog xcnwvc2 $parameters
+}
+
+proc sky130::xchvnwc_dialog {parameters} {
+    sky130::mos_dialog xchvnwc $parameters
+}
+
+#----------------------------------------------------------------
+# getbox:  Get the current cursor box, in microns
+#----------------------------------------------------------------
+
+proc sky130::getbox {} {
+    set curbox [box values]
+    set newbox []
+    set oscale [cif scale out]
+    for {set i 0} {$i < 4} {incr i} {
+        set v [* [lindex $curbox $i] $oscale]
+        lappend newbox $v
+    }
+    return $newbox
+}
+
+#----------------------------------------------------------------
+# unionbox:  Get the union bounding box of box1 and box2
+#----------------------------------------------------------------
+
+proc sky130::unionbox {box1 box2} {
+    set newbox []
+    for {set i 0} {$i < 2} {incr i} {
+        set v [lindex $box1 $i]
+        set o [lindex $box2 $i]
+        if {$v < $o} {
+            lappend newbox $v
+        } else {
+            lappend newbox $o
+        }
+    }
+    for {set i 2} {$i < 4} {incr i} {
+        set v [lindex $box1 $i]
+        set o [lindex $box2 $i]
+        if {$v > $o} {
+            lappend newbox $v
+        } else {
+            lappend newbox $o
+        }
+    }
+    return $newbox
+}
+
+#----------------------------------------------------------------
+# Draw a contact
+#----------------------------------------------------------------
+
+proc sky130::draw_contact {w h s o x atype ctype mtype {orient vert}} {
+
+    # Draw a minimum-size diff contact centered at current position
+    # w is width, h is height.  Minimum size ensured.
+    # x is contact size
+    # s is contact diffusion (or poly) surround
+    # o is contact metal surround
+    # atype is active (e.g., ndiff) or bottom metal if a via
+    # ctype is contact (e.g., ndc)
+    # mtype is metal (e.g., m1) or top metal if a via
+    # orient is the orientation of the contact
+
+    # Set orientations for the bottom material based on material type.
+    # Substrate diffusions (tap) need not overlap the contact in all
+    # directions, but other (diff) types do.  The metal (local
+    # interconnect) layer always overlaps in two directions only.
+
+    set lv_sub_types {"psd" "nsd"}
+    if {[lsearch $lv_sub_types $atype] >= 0} {
+	set aorient $orient
+    } else {
+	set aorient "full"
+    }
+
+    pushbox
+    box size 0 0
+    if {$w < $x} {set w $x}
+    if {$h < $x} {set h $x}
+    set hw [/ $w 2.0]
+    set hh [/ $h 2.0]
+    box grow n ${hh}um
+    box grow s ${hh}um
+    box grow e ${hw}um
+    box grow w ${hw}um
+    paint ${ctype}
+    pushbox
+    # Bottom layer surrounded on sides as declared by aorient
+    if {($aorient == "vert") || ($aorient == "full")} {
+	box grow n ${s}um
+	box grow s ${s}um
+    }
+    if {($aorient == "horz") || ($aorient == "full")} {
+	box grow e ${s}um
+	box grow w ${s}um
+    }
+    paint ${atype}
+    set extents [sky130::getbox]
+    popbox
+    # Top layer surrounded on sides as declared by orient
+    if {($orient == "vert") || ($orient == "full")} {
+        box grow n ${o}um
+        box grow s ${o}um
+    }
+    if {($orient == "horz") || ($orient == "full")} {
+        box grow e ${o}um
+        box grow w ${o}um
+    }
+    paint ${mtype}
+    popbox
+    return $extents
+}
+
+#----------------------------------------------------------------
+# Draw a guard ring
+#----------------------------------------------------------------
+
+proc sky130::guard_ring {gw gh parameters} {
+
+    # Set local default values if they are not in parameters
+    set rlcov 100	;# Right-left contact coverage percentage
+    set tbcov 100	;# Top-bottom contact coverage percentage
+    set grc 1		;# Draw right side contact
+    set glc 1		;# Draw left side contact
+    set gtc 1		;# Draw right side contact
+    set gbc 1		;# Draw left side contact
+    set full_metal 1	;# Draw full (continuous) metal ring
+    set guard_sub_type	 pwell	;# substrate type under guard ring
+    set guard_sub_surround  0	;# substrate type surrounds guard ring
+    set plus_diff_type   nsd	;# guard ring diffusion type
+    set plus_contact_type nsc	;# guard ring diffusion contact type
+    set sub_type	 pwell	;# substrate type
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # Set guard_sub_type to sub_type if it is not defined
+    if {![dict exists $parameters guard_sub_type]} {
+	set guard_sub_type $sub_type
+    }
+
+    set hx [/ $contact_size 2.0]
+    set hw [/ $gw 2.0]
+    set hh [/ $gh 2.0]
+
+    # Watch for (LV) substrate diffusion types, which have a different
+    # contact surround amount depending on the direction
+
+    set lv_sub_types {"psd" "nsd"}
+    if {[lsearch $lv_sub_types $plus_diff_type] >= 0} {
+	set diff_surround 0
+    }
+
+    # Compute diffusion width
+    set difft [+ $contact_size $diff_surround $diff_surround]
+    set hdifft [/ $difft 2.0]
+    # Compute guard ring diffusion width and height
+    set hdiffw [/ [+ $gw $difft] 2.0]
+    set hdiffh [/ [+ $gh $difft] 2.0]
+
+    pushbox
+    box size 0 0
+
+    pushbox
+    box move n ${hh}um
+    box grow n ${hdifft}um
+    box grow s ${hdifft}um
+    box grow e ${hdiffw}um
+    box grow w ${hdiffw}um
+    paint $plus_diff_type
+    if {$guard_sub_surround > 0} {
+	box grow c ${guard_sub_surround}um
+	paint $guard_sub_type
+    }
+    popbox
+    pushbox
+    box move s ${hh}um
+    box grow n ${hdifft}um
+    box grow s ${hdifft}um
+    box grow e ${hdiffw}um
+    box grow w ${hdiffw}um
+    paint $plus_diff_type
+    if {$guard_sub_surround > 0} {
+	box grow c ${guard_sub_surround}um
+	paint $guard_sub_type
+    }
+    popbox
+    pushbox
+    box move e ${hw}um
+    box grow e ${hdifft}um
+    box grow w ${hdifft}um
+    box grow n ${hdiffh}um
+    box grow s ${hdiffh}um
+    paint $plus_diff_type
+    if {$guard_sub_surround > 0} {
+	box grow c ${guard_sub_surround}um
+	paint $guard_sub_type
+    }
+    popbox
+    pushbox
+    box move w ${hw}um
+    box grow e ${hdifft}um
+    box grow w ${hdifft}um
+    box grow n ${hdiffh}um
+    box grow s ${hdiffh}um
+    paint $plus_diff_type
+    if {$guard_sub_surround > 0} {
+	box grow c ${guard_sub_surround}um
+	paint $guard_sub_type
+    }
+    popbox
+
+    if {$full_metal} {
+	set hmetw [/ [+ $gw $contact_size] 2.0]
+	set hmeth [/ [+ $gh $contact_size] 2.0]
+	pushbox
+	box move n ${hh}um
+	box grow n ${hx}um
+	box grow s ${hx}um
+	box grow e ${hmetw}um
+	box grow w ${hmetw}um
+	paint li
+	popbox
+	pushbox
+	box move s ${hh}um
+	box grow n ${hx}um
+	box grow s ${hx}um
+	box grow e ${hmetw}um
+	box grow w ${hmetw}um
+	paint li
+	popbox
+	pushbox
+	box move e ${hw}um
+	box grow e ${hx}um
+	box grow w ${hx}um
+	box grow n ${hmeth}um
+	box grow s ${hmeth}um
+	paint li
+	popbox
+	pushbox
+	box move w ${hw}um
+	box grow e ${hx}um
+	box grow w ${hx}um
+	box grow n ${hmeth}um
+	box grow s ${hmeth}um
+	paint li
+	popbox
+    }
+
+    # Set guard ring height so that contact metal reaches to end, scale by $per
+    # set ch [* [+ $gh $contact_size [* $metal_surround -2.0]] [/ $rlcov 100.0]]
+    set ch [* [- $gh $contact_size [* [+ $metal_surround $metal_spacing] \
+		2.0]] [/ $rlcov 100.0]]
+    if {$ch < $contact_size} {set ch $contact_size}
+
+    # Set guard ring width so that contact metal reaches to side contacts
+    set cw [* [- $gw $contact_size [* [+ $metal_surround $metal_spacing] \
+		2.0]] [/ $tbcov 100.0]]
+    if {$cw < $contact_size} {set cw $contact_size}
+
+    if {$tbcov > 0.0} {
+        if {$gtc == 1} {
+            pushbox
+            box move n ${hh}um
+            sky130::draw_contact $cw 0 $diff_surround $metal_surround \
+		$contact_size $plus_diff_type $plus_contact_type li horz
+            popbox
+	}
+	if {$gbc == 1} {
+	    pushbox
+	    box move s ${hh}um
+	    sky130::draw_contact $cw 0 $diff_surround $metal_surround \
+		$contact_size $plus_diff_type $plus_contact_type li horz
+	    popbox
+	}
+    }
+    if {$rlcov > 0.0} {
+        if {$grc == 1} {
+            pushbox
+            box move e ${hw}um
+            sky130::draw_contact 0 $ch $diff_surround $metal_surround \
+		$contact_size $plus_diff_type $plus_contact_type li vert
+            popbox
+        }
+        if {$glc == 1} {
+            pushbox
+            box move w ${hw}um
+            sky130::draw_contact 0 $ch $diff_surround $metal_surround \
+		$contact_size $plus_diff_type $plus_contact_type li vert
+            popbox
+        }
+    }
+
+    pushbox
+    box grow e ${hw}um
+    box grow w ${hw}um
+    box grow n ${hh}um
+    box grow s ${hh}um
+    # Create boundary using properties
+    property FIXED_BBOX [box values]
+    box grow c ${hx}um  ;# to edge of contact
+    box grow c ${diff_surround}um  ;# to edge of diffusion
+    box grow c ${sub_surround}um  ;# sub/well overlap of diff (NOT guard_sub)
+    paint $sub_type
+    set cext [sky130::getbox]
+    popbox
+    popbox
+
+    return $cext
+}
+
+#----------------------------------------------------------------
+# MOSFET: Draw a single device
+#----------------------------------------------------------------
+
+proc sky130::mos_device {parameters} {
+
+    # Epsilon for avoiding round-off errors
+    set eps  0.0005
+
+    # Set local default values if they are not in parameters
+    set diffcov 100	;# percent coverage of diffusion contact
+    set polycov 100	;# percent coverage of poly contact
+    set topc 1		;# draw top poly contact
+    set botc 1		;# draw bottom poly contact
+    set evenodd 1	;# even or odd numbered device finger, in X
+    set dev_sub_type ""	;# device substrate type (if different from guard ring)
+    set min_effl 0	;# gate length below which finger pitch must be stretched
+    set diff_overlap_cont 0	;# extra overlap of end contact by diffusion
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # Draw the diffusion and poly
+    pushbox
+    box size 0 0
+    pushbox
+    set hw [/ $w 2.0]
+    set hl [/ $l 2.0]
+    set he [/ $min_effl 2.0]
+    if {$nf == 1 || $he < $hl} {set he $hl}
+    box grow n ${hw}um
+    box grow s ${hw}um
+    box grow e ${hl}um
+    box grow w ${hl}um
+    pushbox
+    if {${diff_extension} > ${gate_to_diffcont}} {
+        box grow e ${diff_extension}um
+        box grow w ${diff_extension}um
+    } else {
+        box grow e ${gate_to_diffcont}um
+        box grow w ${gate_to_diffcont}um
+    }
+    paint ${diff_type}
+    popbox
+    pushbox
+    if {${gate_extension} > ${gate_to_polycont}} {
+	box grow n ${gate_extension}um
+	box grow s ${gate_extension}um
+    } else {
+	if {$topc} {
+	    box grow n ${gate_to_polycont}um
+	} else {
+	    box grow n ${gate_extension}um
+	}
+	if {$botc} {
+	    box grow s ${gate_to_polycont}um
+	} else {
+	    box grow s ${gate_extension}um
+	}
+    }
+    paint ${poly_type}
+    set cext [sky130::getbox]
+    popbox
+    # save gate area now and paint later, so that diffusion surrounding the
+    # contact does not paint over the gate area, in case the gate type is
+    # not part of a "compose" entry in the techfile.
+    set gaterect [box values]
+    popbox
+
+    # Adjust position of contacts for dogbone geometry
+    # Rule 1: Minimize diffusion length.  Contacts only move out
+    # if width <  contact diffusion height.  They move out enough
+    # that the diffusion-to-poly spacing is satisfied.
+
+    set ddover 0
+    set cdwmin [+ ${contact_size} [* ${diff_surround} 2]]
+    set cstem [- ${gate_to_diffcont} [/ ${cdwmin} 2.0]]
+    set cgrow [- ${diff_poly_space} ${cstem}]
+    if {[+ ${w} ${eps}] < ${cdwmin}} {
+        if {${cgrow} > 0} {
+            set gate_to_diffcont [+ ${gate_to_diffcont} ${cgrow}]
+        }
+	set ddover [/ [- ${cdwmin} ${w}] 2.0]
+    }
+
+    # Rule 2: Minimum poly width.  Poly contacts only move out
+    # if length < contact poly width.  They move out enough
+    # that the diffusion-to-poly spacing is satisfied.
+
+    set gporig ${gate_to_polycont}
+    set cplmin [+ ${contact_size} [* ${poly_surround} 2]]
+    set cstem [- ${gate_to_polycont} [/ ${cplmin} 2.0]]
+    set cgrow [- ${diff_poly_space} ${cstem}]
+    if {[+ ${l} ${eps}] < ${cplmin}} {
+        if {${cgrow} > 0} {
+            set gate_to_polycont [+ ${gate_to_polycont} ${cgrow}]
+        }
+    }
+
+    # Rule 3: If both poly and diffusion are dogboned, then move
+    # poly out further to clear spacing to the diffusion contact
+
+    if {[+ ${w} ${eps}] < ${cdwmin}} {
+        if {[+ ${l} ${eps}] < ${cplmin}} {
+            set cgrow [/ [- ${cplmin} ${w}] 2.0]
+            set gate_to_polycont [+ ${gate_to_polycont} ${cgrow}]
+        }
+    }
+
+    # Rule 4: If M > 1 and poly contacts overlap, then increase the
+    # transistor-to-poly-contact distance by the amount of any
+    # diffusion dogbone overhang.
+
+    if {($poverlap == 1) && ($m > 1)} {
+	if {${gate_to_polycont} - $gporig < $ddover} {
+	    set gate_to_polycont [+ ${gporig} ${ddover}]
+	}
+    }
+
+    # Reduce contact sizes by poly or diffusion surround so that
+    # the contact area edges match the device diffusion or poly.
+    # (Minimum dimensions will be enforced by the contact drawing routine)
+    set tsurround [+ ${diff_surround} ${diff_overlap_cont}]
+    set cdw [- ${w} [* ${tsurround} 2]]		;# diff contact height
+    set cpl [- ${l} [* ${poly_surround} 2]]     ;# poly contact width
+
+    # Reduce by coverage percentage.  NOTE:  If overlapping multiple devices,
+    # keep maximum poly contact coverage.
+
+    set cdw [* ${cdw} [/ ${diffcov} 100.0]]
+    if {($poverlap == 0) || ($m == 1)} {
+	set cpl [* ${cpl} [/ ${polycov} 100.0]]
+    }
+
+    # Right diffusion contact
+    pushbox
+    box move e ${he}um
+    box move e ${gate_to_diffcont}um
+    set cext [sky130::unionbox $cext [sky130::draw_contact 0 ${cdw} \
+		${diff_surround} ${metal_surround} ${contact_size}\
+		${diff_type} ${diff_contact_type} li vert]]
+    popbox
+    # Left diffusion contact
+    pushbox
+    box move w ${he}um
+    box move w ${gate_to_diffcont}um
+    set cext [sky130::unionbox $cext [sky130::draw_contact 0 ${cdw} \
+		${diff_surround} ${metal_surround} ${contact_size} \
+		${diff_type} ${diff_contact_type} li vert]]
+    set diffarea $cext
+    popbox
+    # Top poly contact
+    if {$topc} {
+       pushbox
+       box move n ${hw}um
+       box move n ${gate_to_polycont}um
+       set cext [sky130::unionbox $cext [sky130::draw_contact ${cpl} 0 \
+		${poly_surround} ${metal_surround} ${contact_size} \
+		${poly_type} ${poly_contact_type} li horz]]
+       popbox
+    }
+    # Bottom poly contact
+    if {$botc} {
+       pushbox
+       box move s ${hw}um
+       box move s ${gate_to_polycont}um
+       set cext [sky130::unionbox $cext [sky130::draw_contact ${cpl} 0 \
+		${poly_surround} ${metal_surround} ${contact_size} \
+		${poly_type} ${poly_contact_type} li horz]]
+       popbox
+    }
+
+    # Now draw the gate, after contacts have been drawn
+    pushbox
+    box values {*}${gaterect}
+    # gate_type need not be defined if poly over diff paints the right type.
+    catch {paint ${gate_type}}
+    # sub_surround_dev, if defined, may create a larger area around the gate
+    # than sub_surround creates around the diffusion/poly area.
+    if [dict exists $parameters sub_surround_dev] {
+	box grow n ${sub_surround_dev}um
+	box grow s ${sub_surround_dev}um
+	box grow e ${sub_surround_dev}um
+	box grow w ${sub_surround_dev}um
+	paint ${dev_sub_type}
+	set cext [sky130::unionbox $cext [sky130::getbox]]
+    }
+    popbox
+
+    if {$dev_sub_type != ""} {
+	box values [lindex $diffarea 0]um [lindex $diffarea 1]um \
+	    [lindex $diffarea 2]um [lindex $diffarea 3]um
+	box grow n ${sub_surround}um
+	box grow s ${sub_surround}um
+	box grow e ${sub_surround}um
+	box grow w ${sub_surround}um
+	paint ${dev_sub_type}
+	set cext [sky130::unionbox $cext [sky130::getbox]]
+        # puts stdout "Diagnostic:  bounding box is $cext"
+    }
+
+    popbox
+    return $cext
+}
+
+#----------------------------------------------------------------
+# MOSFET: Draw the tiled device
+#----------------------------------------------------------------
+
+proc sky130::mos_draw {parameters} {
+    tech unlock *
+    set savesnap [snap]
+    snap internal
+
+    # Set defaults if they are not in parameters
+    set poverlap 0	;# overlap poly contacts when tiling
+    set doverlap 1	;# overlap diffusion contacts when tiling
+    set dev_sub_dist 0	;# substrate to guard ring, if dev_sub_type defined
+    set dev_sub_space 0	;# distance between substrate areas for arrayed devices
+    set min_allc 0	;# gate length below which poly contacts must be interleaved
+    set id_type ""	;# additional type covering everything
+    set id_surround 0	;# amount of surround on above type
+    set id2_type ""	;# additional type covering everything
+    set id2_surround 0	;# amount of surround on above type
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # Diff-to-tap spacing is by default the same as diff spacing
+    if {![dict exist $parameters diff_tap_space]} {
+	set diff_tap_space $diff_spacing
+    }
+
+    # If poverlap is 1 then both poly contacts must be present
+    if {$poverlap == 1} {
+	set topc 1
+	set botc 1
+	dict set parameters topc 1
+	dict set parameters botc 1
+    }
+
+    # Normalize distance units to microns
+    set w [magic::spice2float $w]
+    set l [magic::spice2float $l]
+
+    pushbox
+    box values 0 0 0 0
+
+    # If dx < (poly contact space + poly contact width), then there is not
+    # enough room for a row of contacts, so force alternating contacts
+
+    if {$nf > 1 && $l < $min_allc} {
+	set intc 1
+	set evenodd 1
+	set topc 1
+	set botc 1
+	dict set parameters topc 1
+	dict set parameters botc 1
+	set poverlap 0
+    } else {
+	set intc 0
+    }
+
+    # Determine the base device dimensions by drawing one device
+    # while all layers are locked (nothing drawn).  This allows the
+    # base drawing routine to do complicated geometry without having
+    # to duplicate it here with calculations.
+
+    tech lock *
+    set bbox [sky130::mos_device $parameters]
+    # puts stdout "Diagnostic: Device bounding box e $bbox (um)"
+    tech unlock *
+
+    set fw [- [lindex $bbox 2] [lindex $bbox 0]]
+    set fh [- [lindex $bbox 3] [lindex $bbox 1]]
+    set lw [+ [lindex $bbox 2] [lindex $bbox 0]]
+    set lh [+ [lindex $bbox 3] [lindex $bbox 1]]
+
+    # If dev_sub_dist > 0 then each device must be in its own substrate
+    # (well) area, and overlaps are disallowed.  dev_sub_space determines
+    # the distance between individual devices in an array.
+
+    if {$dev_sub_dist > 0} {
+        set poverlap 0
+        set doverlap 0
+
+	if {$dev_sub_space > $poly_spacing} {
+	    set dx [+ $fw $dev_sub_space]
+	    set dy [+ $fh $dev_sub_space]
+	} else {
+	    set dx [+ $fw $poly_spacing]
+	    set dy [+ $fh $poly_spacing]
+	}
+
+    } else {
+
+	# Determine tile width and height (depends on overlap)
+	if {$poverlap == 0} {
+	    set dy [+ $fh $poly_spacing]
+	} else {
+	    # overlap poly
+	    set dy [- $fh [+ $poly_surround $poly_surround $contact_size]]
+	}
+
+	if {$doverlap == 0} {
+	    set dx [+ $fw $diff_spacing]
+	} else {
+	    # overlap diffusions
+	    set dx [- $fw [+ $diff_surround $diff_surround $contact_size]]
+	}
+    }
+
+    # Determine core width and height
+    set corex [+ [* [- $nf 1] $dx] $fw]
+    set corey [+ [* [- $m 1] $dy] $fh]
+    set corellx [/ [+ [- $corex $fw] $lw] 2.0]
+    set corelly [/ [+ [- $corey $fh] $lh] 2.0]
+
+    # If there is a diffusion dogbone, and no top poly contact, then
+    # increase the core height by the amount of the dogbone overhang.
+
+    if {$topc == 0} {
+	set cdwmin [+ ${contact_size} [* ${diff_surround} 2]]
+	if {${w} < ${cdwmin}} {
+	    set corey [+ $corey [/ [- ${cdwmin} ${w}] 2.0]]
+	}
+    }
+
+    if {$guard != 0} {
+	# Calculate guard ring size (measured to contact center)
+	if {($dev_sub_dist > 0) && ([+ $dev_sub_dist $sub_surround] > $diff_tap_space)} {
+	    set gx [+ $corex [* 2.0 [+ $dev_sub_dist $diff_surround]] $contact_size]
+	} else {
+	    set gx [+ $corex [* 2.0 [+ $diff_tap_space $diff_surround]] $contact_size]
+	}
+	if {($dev_sub_dist > 0) && ([+ $dev_sub_dist $sub_surround] > $diff_gate_space)} {
+	    set gy [+ $corey [* 2.0 [+ $dev_sub_dist $diff_surround]] $contact_size]
+	} else {
+	    set gy [+ $corey [* 2.0 [+ $diff_gate_space $diff_surround]] $contact_size]
+	}
+
+	# Somewhat tricky. . . if the width is small and the diffusion is 
+	# a dogbone, and the top or bottom poly contact is missing, then
+	# the spacing to the guard ring may be limited by diffusion spacing, not
+	# poly to diffusion.
+
+	set inset [/ [+ $contact_size [* 2.0 $diff_surround] -$w] 2.0]
+	set sdiff [- [+ $inset $diff_tap_space] [+ $gate_extension $diff_gate_space]]
+
+	if {$sdiff > 0} {
+	    if {$topc == 0} {
+		set gy [+ $gy $sdiff]
+		set corelly [+ $corelly [/ $sdiff 2.0]]
+	    }
+	    if {$botc == 0} {
+		set gy [+ $gy $sdiff]
+		set corelly [- $corelly [/ $sdiff 2.0]]
+	    }
+	}
+
+	# Draw the guard ring first, as MOS well may interact with guard ring substrate
+	sky130::guard_ring $gx $gy $parameters
+    }
+
+    pushbox
+    # If any surrounding identifier type is defined, draw it
+    if {${id_type} != ""} {
+	set hw [/ $gx 2]
+	set hh [/ $gy 2]
+	box grow e ${hw}um
+	box grow w ${hw}um
+	box grow n ${hh}um
+	box grow s ${hh}um
+	box grow c ${id_surround}um
+	paint ${id_type}
+    }
+    popbox
+    pushbox
+    box move w ${corellx}um
+    box move s ${corelly}um
+    for {set xp 0} {$xp < $nf} {incr xp} {
+        pushbox
+	if {$intc == 1} {
+	    set evenodd [- 1 $evenodd]
+	    if {$evenodd == 1} {
+		dict set parameters topc 1
+		dict set parameters botc 0
+	    } else {
+		dict set parameters topc 0
+		dict set parameters botc 1
+	    }
+	    set saveeo $evenodd
+	}
+        for {set yp 0} {$yp < $m} {incr yp} {
+            sky130::mos_device $parameters
+            box move n ${dy}um
+	    if {$intc == 1} {
+		set evenodd [- 1 $evenodd]
+		if {$evenodd == 1} {
+		    dict set parameters topc 1
+		    dict set parameters botc 0
+		} else {
+		    dict set parameters topc 0
+		    dict set parameters botc 1
+		}
+	    }
+        }
+	if {$intc == 1} {
+	    set evenodd $saveeo
+	}
+        popbox
+        box move e ${dx}um
+    }
+    popbox
+    popbox
+
+    snap $savesnap
+    tech revert
+}
+
+#-------------------
+# nMOS 1.8V
+#-------------------
+
+proc sky130::nshort_draw {parameters} {
+    set newdict [dict create \
+	    gate_type		nfet \
+	    diff_type 		ndiff \
+	    diff_contact_type	ndc \
+	    plus_diff_type	psd \
+	    plus_contact_type	psc \
+	    poly_type		poly \
+	    poly_contact_type	pc \
+	    sub_type		psub \
+	    min_effl		0.185 \
+	    min_allc		0.26 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::mos_draw $drawdict]
+}
+
+proc sky130::nlowvt_draw {parameters} {
+    set newdict [dict create \
+	    gate_type		nfetlvt \
+	    diff_type 		ndiff \
+	    diff_contact_type	ndc \
+	    plus_diff_type	psd \
+	    plus_contact_type	psc \
+	    poly_type		poly \
+	    poly_contact_type	pc \
+	    sub_type		psub \
+	    min_effl		0.185 \
+	    min_allc		0.26 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::mos_draw $drawdict]
+}
+
+proc sky130::sonos_e_draw {parameters} {
+    set newdict [dict create \
+	    gate_type		nsonos \
+	    diff_type 		ndiff \
+	    diff_contact_type	ndc \
+	    plus_diff_type	psd \
+	    plus_contact_type	psc \
+	    poly_type		poly \
+	    poly_contact_type	pc \
+	    sub_type		psub \
+	    id_type		dnwell \
+	    id_surround		1.355 \
+	    min_effl		0.185 \
+	    min_allc		0.26 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::mos_draw $drawdict]
+}
+
+#-------------------
+# pMOS 1.8V
+#-------------------
+
+proc sky130::pshort_draw {parameters} {
+    set newdict [dict create \
+	    gate_type		pfet \
+	    diff_type 		pdiff \
+	    diff_contact_type	pdc \
+	    plus_diff_type	nsd \
+	    plus_contact_type	nsc \
+	    poly_type		poly \
+	    poly_contact_type	pc \
+	    sub_type		nwell \
+	    gate_to_polycont	0.32 \
+	    min_effl		0.185 \
+	    min_allc		0.26 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::mos_draw $drawdict]
+}
+
+proc sky130::plowvt_draw {parameters} {
+    set newdict [dict create \
+	    gate_type		pfetlvt \
+	    diff_type 		pdiff \
+	    diff_contact_type	pdc \
+	    plus_diff_type	nsd \
+	    plus_contact_type	nsc \
+	    poly_type		poly \
+	    poly_contact_type	pc \
+	    sub_type		nwell \
+	    gate_to_polycont	0.32 \
+	    min_effl		0.185 \
+	    min_allc		0.26 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::mos_draw $drawdict]
+}
+
+proc sky130::phighvt_draw {parameters} {
+    set newdict [dict create \
+	    gate_type		pfethvt \
+	    diff_type 		pdiff \
+	    diff_contact_type	pdc \
+	    plus_diff_type	nsd \
+	    plus_contact_type	nsc \
+	    poly_type		poly \
+	    poly_contact_type	pc \
+	    sub_type		nwell \
+	    gate_to_polycont	0.32 \
+	    min_effl		0.185 \
+	    min_allc		0.26 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::mos_draw $drawdict]
+}
+
+#-------------------
+# pMOS 5.0V
+#-------------------
+
+proc sky130::phv_draw {parameters} {
+    set newdict [dict create \
+	    gate_type		mvpfet \
+	    diff_type 		mvpdiff \
+	    diff_contact_type	mvpdc \
+	    plus_diff_type	mvnsd \
+	    plus_contact_type	mvnsc \
+	    poly_type		poly \
+	    poly_contact_type	pc \
+	    sub_type		nwell \
+	    guard_sub_surround	0.33 \
+	    gate_to_polycont	0.32 \
+	    diff_spacing	0.31 \
+	    diff_tap_space	0.38 \
+	    diff_gate_space	0.38 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::mos_draw $drawdict]
+}
+
+#-------------------
+# nMOS 5.0V
+#-------------------
+
+proc sky130::nhv_draw {parameters} {
+    set newdict [dict create \
+	    gate_type		mvnfet \
+	    diff_type 		mvndiff \
+	    diff_contact_type	mvndc \
+	    plus_diff_type	mvpsd \
+	    plus_contact_type	mvpsc \
+	    poly_type		poly \
+	    poly_contact_type	pc \
+	    sub_type		psub \
+	    diff_spacing	0.31 \
+	    diff_tap_space	0.38 \
+	    diff_gate_space	0.38 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::mos_draw $drawdict]
+}
+
+proc sky130::nhvnative_draw {parameters} {
+    set newdict [dict create \
+	    gate_type		mvnnfet \
+	    diff_type 		mvndiff \
+	    diff_contact_type	mvndc \
+	    plus_diff_type	mvpsd \
+	    plus_contact_type	mvpsc \
+	    poly_type		poly \
+	    poly_contact_type	pc \
+	    sub_type		psub \
+	    diff_spacing	0.30 \
+	    diff_tap_space	0.38 \
+	    diff_gate_space	0.38 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::mos_draw $drawdict]
+}
+
+#------------------------
+# MOS varactor (1.8V)
+#------------------------
+
+proc sky130::xcnwvc_draw {parameters} {
+    set newdict [dict create \
+	    gate_type		var \
+	    diff_type 		nnd \
+	    diff_contact_type	nsc \
+	    plus_diff_type	psd \
+	    plus_contact_type	psc \
+	    poly_type		poly \
+	    poly_contact_type	pc \
+	    sub_type		psub \
+	    dev_sub_type	nwell \
+	    diff_overlap_cont	0.06 \
+	    dev_sub_dist	0.14 \
+	    dev_sub_space	1.27 \
+	    gate_to_diffcont	0.34 \
+	    diff_extension	0.485 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::mos_draw $drawdict]
+}
+
+proc sky130::xcnwvc2_draw {parameters} {
+    set newdict [dict create \
+	    gate_type		varhvt \
+	    diff_type 		nnd \
+	    diff_contact_type	nsc \
+	    plus_diff_type	psd \
+	    plus_contact_type	psc \
+	    poly_type		poly \
+	    poly_contact_type	pc \
+	    sub_type		psub \
+	    dev_sub_type	nwell \
+	    diff_overlap_cont	0.06 \
+	    dev_sub_dist	0.14 \
+	    dev_sub_space	1.27 \
+	    gate_to_diffcont	0.34 \
+	    diff_extension	0.485 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::mos_draw $drawdict]
+}
+
+#---------------------------------------------------------
+# MOS varactor (5.0V)
+# NOTE:  dev_sub_space set to 2.0 assuming different nets.
+# Should have option for same-net with merged wells.
+#---------------------------------------------------------
+
+proc sky130::xchvnwc_draw {parameters} {
+    set newdict [dict create \
+	    gate_type		mvvar \
+	    diff_type 		mvnsd \
+	    diff_contact_type	mvnsc \
+	    plus_diff_type	mvpsd \
+	    plus_contact_type	mvpsc \
+	    poly_type		poly \
+	    poly_contact_type	pc \
+	    sub_type		psub \
+	    dev_sub_type	nwell \
+	    sub_surround	0.38 \
+	    sub_surround_dev	0.56 \
+	    guard_sub_surround	0.18 \
+	    diff_overlap_cont	0.06 \
+	    dev_sub_dist	0.785 \
+	    dev_sub_space	2.0 \
+	    gate_to_diffcont	0.34 \
+	    diff_extension	0.485 \
+    ]
+    set drawdict [dict merge $sky130::ruleset $newdict $parameters]
+    return [sky130::mos_draw $drawdict]
+}
+
+#----------------------------------------------------------------
+# MOSFET: Check device parameters for out-of-bounds values
+#----------------------------------------------------------------
+
+proc sky130::mos_check {device parameters} {
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # Normalize distance units to microns
+    set l [magic::spice2float $l] 
+    set l [magic::3digitpastdecimal $l]
+    set w [magic::spice2float $w] 
+    set w [magic::3digitpastdecimal $w]
+
+    # nf, m must be integer
+    if {![string is int $nf]} {
+	puts stderr "NF must be an integer!"
+        dict set parameters nf 1
+    }
+    if {![string is int $m]} {
+	puts stderr "M must be an integer!"
+        dict set parameters m 1
+    }
+    # diffcov, polycov must be numeric
+    if {[catch {expr abs($diffcov)}]} {
+	puts stderr "diffcov must be numeric!"
+	set diffcov 100
+    }
+    if {[catch {expr abs($polycov)}]} {
+	puts stderr "polycov must be numeric!"
+	set polycov 100
+    }
+
+    if {$l < $lmin} {
+	puts stderr "Mos length must be >= $lmin um"
+        dict set parameters l $lmin
+    } 
+    if {$w < $wmin} {
+	puts stderr "Mos width must be >= $wmin um"
+        dict set parameters w $wmin
+    } 
+    if {$nf < 1} {
+	puts stderr "NF must be >= 1"
+        dict set parameters nf 1
+    } 
+    if {$m < 1} {
+	puts stderr "M must be >= 1"
+        dict set parameters m 1
+    } 
+    if {$diffcov < 20 } {
+	puts stderr "Diffusion contact coverage must be at least 20%"
+        dict set parameters diffcov 20
+    } elseif {$diffcov > 100 } {
+	puts stderr "Diffusion contact coverage can't be more than 100%"
+        dict set parameters diffcov 100
+    }
+    if {$polycov < 20 } {
+	puts stderr "Poly contact coverage must be at least 20%"
+        dict set parameters polycov 20
+    } elseif {$polycov > 100 } {
+	puts stderr "Poly contact coverage can't be more than 100%"
+        dict set parameters polycov 100
+    }
+
+    # Values must satisfy diffusion-to-tap spacing of 20um.
+    # Therefore the maximum of guard ring width or height cannot exceed 40um.
+    # If in violation, reduce counts first, as these are easiest to recover
+    # by duplicating the device and overlapping the wells.
+    set origm $m
+    set orignf $nf
+    while true {
+       set yext [expr ($w + 3.0) * $m]
+       set xext [expr ($l + 1.0) * $nf + 1.1]
+       if {[expr min($xext, $yext)] > 40.0} {
+          if {$yext > 40.0 && $m > 1} {
+	     incr m -1
+	  } elseif {$xext > 40.0 && $nf > 1} {
+	     incr nf -1
+	  } elseif {$yext > 40.0} {
+	     set w 37
+	     puts -nonewline stderr "Transistor width must be < 37 um"
+	     puts stderr " to avoid tap spacing violation."
+	     dict set parameters w $w
+	  } elseif {$xext > 40.0} {
+	     set l 37.9
+	     puts -nonewline stderr "Transistor length must be < 37.9 um"
+	     puts stderr " to avoid tap spacing violation."
+	     dict set parameters l $l
+	  }
+       } else {
+	  break
+       }
+    }
+    if {$m != $origm} {
+       puts stderr "Y repeat reduced to prevent tap distance violation"
+       dict set parameters m $m
+    }
+    if {$nf != $orignf} {
+       puts stderr "X repeat reduced to prevent tap distance violation"
+       dict set parameters nf $nf
+    }
+
+    return $parameters
+}
+
+#----------------------------------------------------------------
+
+proc sky130::nshort_check {parameters} {
+   return [sky130::mos_check nshort $parameters]
+}
+
+proc sky130::nlowvt_check {parameters} {
+   return [sky130::mos_check nlowvt $parameters]
+}
+
+proc sky130::sonos_e_check {parameters} {
+   return [sky130::mos_check sonos_e $parameters]
+}
+
+proc sky130::nhv_check {parameters} {
+   return [sky130::mos_check nhv $parameters]
+}
+
+proc sky130::nhvnative_check {parameters} {
+   return [sky130::mos_check nhvnative $parameters]
+}
+
+proc sky130::pshort_check {parameters} {
+   return [sky130::mos_check pshort $parameters]
+}
+
+proc sky130::plowvt_check {parameters} {
+   return [sky130::mos_check plowvt $parameters]
+}
+
+proc sky130::phighvt_check {parameters} {
+   return [sky130::mos_check phighvt $parameters]
+}
+
+proc sky130::phv_check {parameters} {
+   return [sky130::mos_check phv $parameters]
+}
+
+proc sky130::xcnwvc_check {parameters} {
+   return [sky130::mos_check xcnwvc $parameters]
+}
+
+proc sky130::xcnwvc2_check {parameters} {
+   return [sky130::mos_check xcnwvc2 $parameters]
+}
+
+proc sky130::xchvnwc_check {parameters} {
+   return [sky130::mos_check xchvnwc $parameters]
+}
+
+#----------------------------------------------------------------
+# Fixed device: Specify all user-editable default values
+#
+# deltax --- Additional horizontal space between devices
+# deltay --- Additional vertical space between devices
+# nx     --- Number of arrayed devices in X
+# ny     --- Number of arrayed devices in Y
+#
+# Note that these values, specifically nx, ny, deltax,
+# and deltay, are properties of the instance, not the cell.
+# They translate to the instance array x and y counts;  while
+# deltax is the x pitch less the cell width, and deltay is the
+# y pitch less the cell height.
+#
+# non-user-editable
+#
+# nocell --- Indicates that this cell has a predefined layout
+#	     and therefore there is no cell to draw.
+# xstep  --- Width of the cell (nominal array pitch in X)
+# ystep  --- Height of the cell (nominal array pitch in Y)
+#----------------------------------------------------------------
+
+# Fixed-layout devices (from sky130_fd_pr_base, _rf, and _rf2 libraries)
+#
+# Bipolar transistors:
+#
+# sky130_fd_pr_rf_npn_1x1
+# sky130_fd_pr_rf_npn_1x2
+# sky130_fd_pr_rf_pnp5x
+#
+# Parallel Plate Capacitors:
+#
+# sky130_fd_pr_rf2_xcmvpp11p5x11p7_lim5shield
+# sky130_fd_pr_rf2_xcmvpp11p5x11p7_m3_lim5shield
+# sky130_fd_pr_rf2_xcmvpp11p5x11p7_m4shield
+# sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym4shield
+# sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym50p4shield
+# sky130_fd_pr_rf2_xcmvpp4p4x4p6_m3_lim5shield
+# sky130_fd_pr_rf2_xcmvpp6p8x6p1_lim4shield
+# sky130_fd_pr_rf2_xcmvpp6p8x6p1_polym4shield
+# sky130_fd_pr_rf2_xcmvpp8p6x7p9_m3_lim5shield
+# sky130_fd_pr_rf2_xcmvppx4_2xnhvnative10x4
+# sky130_fd_pr_rf_xcmvpp11p5x11p7_m3_lishield
+# sky130_fd_pr_rf_xcmvpp11p5x11p7_m3shield
+# sky130_fd_pr_rf_xcmvpp1p8x1p8_lishield
+# sky130_fd_pr_rf_xcmvpp1p8x1p8_m3shield
+# sky130_fd_pr_rf_xcmvpp2
+# sky130_fd_pr_rf_xcmvpp2_nwell
+# sky130_fd_pr_rf_xcmvpp4p4x4p6_m3_lishield
+# sky130_fd_pr_rf_xcmvpp4p4x4p6_m3shield
+# sky130_fd_pr_rf_xcmvpp8p6x7p9_m3_lishield
+# sky130_fd_pr_rf_xcmvpp8p6x7p9_m3shield
+#
+# Inductors:
+#
+# balun
+# xind4_011
+# xind4_02
+
+proc sky130::sky130_fd_pr_rf_npn_1x1_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 7.03 ystep 7.03}
+}
+
+proc sky130::sky130_fd_pr_rf_npn_1x2_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 7.03 ystep 8.03}
+}
+
+proc sky130::sky130_fd_pr_rf_pnp5x_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 6.44 ystep 6.44}
+}
+
+proc sky130::balun_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 292 ystep 292}
+}
+
+proc sky130::xind4_02_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 258 ystep 258}
+}
+
+proc sky130::xind4_011_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 290 ystep 404}
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_lim5shield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 11.08 ystep 11.36}
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_m3_lim5shield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 11.08 ystep 11.36}
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_m4shield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 11.08 ystep 11.36}
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym4shield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 11.08 ystep 11.36}
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym50p4shield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 11.08 ystep 11.36}
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp4p4x4p6_m3_lim5shield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 4.05 ystep 4.26}
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp6p8x6p1_lim4shield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 6.47 ystep 5.76}
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp6p8x6p1_polym4shield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 6.47 ystep 5.76}
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp8p6x7p9_m3_lim5shield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 8.25 ystep 7.51}
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvppx4_2xnhvnative10x4_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 10.41 ystep 11.54}
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp11p5x11p7_m3_lishield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 11.08 ystep 11.36}
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp11p5x11p7_m3shield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 11.08 ystep 11.36}
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp1p8x1p8_lishield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 1.77 ystep 1.77}
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp1p8x1p8_m3shield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 3.88 ystep 3.88}
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp2_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 4.55 ystep 4.76}
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp2_nwell_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 4.55 ystep 4.76}
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp4p4x4p6_m3_lishield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 4.05 ystep 4.26}
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp4p4x4p6_m3shield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 4.05 ystep 4.26}
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp8p6x7p9_m3_lishield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 8.25 ystep 7.51}
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp8p6x7p9_m3shield_defaults {} {
+    return {nx 1 ny 1 deltax 0 deltay 0 nocell 1 xstep 8.25 ystep 7.51}
+}
+
+#----------------------------------------------------------------
+# Fixed device: Conversion from SPICE netlist parameters to toolkit
+#----------------------------------------------------------------
+
+proc sky130::fixed_convert {parameters} {
+    set pdkparams [dict create]
+    dict for {key value} $parameters {
+	switch -nocase $key {
+	    m {
+		 dict set pdkparams nx $value
+	    }
+	}
+    }
+    return $pdkparams
+}
+
+#----------------------------------------------------------------
+
+proc sky130::sky130_fd_pr_rf_npn_1x1_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_npn_1x2_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_pnp5x_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::balun_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::xind4_011_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::xind4_02_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_lim5shield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_m3_lim5shield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_m4shield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym4shield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym50p4shield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp4p4x4p6_m3_lim5shield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp6p8x6p1_lim4shield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp6p8x6p1_polym4shield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp8p6x7p9_m3_lim5shield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvppx4_2xnhvnative10x4_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp11p5x11p7_m3_lishield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp11p5x11p7_m3shield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp1p8x1p8_lishield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp1p8x1p8_m3shield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp2_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp2_nwell_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp4p4x4p6_m3_lishield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp4p4x4p6_m3shield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp8p6x7p9_m3_lishield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp8p6x7p9_m3shield_convert {parameters} {
+    return [sky130::fixed_convert $parameters]
+}
+
+#----------------------------------------------------------------
+# Fixed device: Interactively specifies the fixed layout parameters
+#----------------------------------------------------------------
+
+proc sky130::fixed_dialog {parameters} {
+    # Instance fields:	    nx, ny, pitchx, pitchy
+    # Editable fields:	    nx, ny, deltax, deltay
+    # Non-editable fields:  nocell, xstep, ystep
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # "nocell" field causes nx and ny to be dropped in from
+    # "array count".  Also "pitchx" and "pitchy" are passed
+    # in internal units.  Convert these to microns and generate
+    # If there is no pitchx and pitchy, then the device has not
+    # yet been created, so keep the deltax and deltay defaults.
+
+    if [dict exists $parameters pitchx] {
+	set pitchux [magic::i2u $pitchx]
+	set stepux [magic::spice2float $xstep]
+        set deltax [magic::3digitpastdecimal [expr $pitchux - $stepux]] 
+        # An array size 1 should not cause deltax to go negative
+	if {$deltax < 0.0} {set deltax 0.0}
+	dict set parameters deltax $deltax
+    }
+    if [dict exists $parameters pitchy] {
+	set pitchuy [magic::i2u $pitchy]
+	set stepuy [magic::spice2float $ystep]
+        set deltay [magic::3digitpastdecimal [expr $pitchuy - $stepuy]] 
+        # An array size 1 should not cause deltay to go negative
+	if {$deltay < 0.0} {set deltay 0.0}
+	dict set parameters deltay $deltay
+    }
+
+    magic::add_entry nx "NX" $parameters
+    magic::add_entry ny "NY" $parameters
+    magic::add_entry deltax "X step (um)" $parameters
+    magic::add_entry deltay "Y step (um)" $parameters
+}
+
+proc sky130::sky130_fd_pr_rf_npn_1x1_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf_npn_1x2_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf_pnp5x_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::balun_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::xind4_011_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::xind4_02_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_lim5shield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_m3_lim5shield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_m4shield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym4shield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym50p4shield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp4p4x4p6_m3_lim5shield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp6p8x6p1_lim4shield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp6p8x6p1_polym4shield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp8p6x7p9_m3_lim5shield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvppx4_2xnhvnative10x4_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp11p5x11p7_m3_lishield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp11p5x11p7_m3shield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp1p8x1p8_lishield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp1p8x1p8_m3shield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp2_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp2_nwell_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp4p4x4p6_m3_lishield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp4p4x4p6_m3shield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp8p6x7p9_m3_lishield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp8p6x7p9_m3shield_dialog {parameters} {
+    sky130::fixed_dialog $parameters
+}
+
+#----------------------------------------------------------------
+# Fixed device: Draw the device
+#----------------------------------------------------------------
+
+proc sky130::fixed_draw {devname parameters} {
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # This cell declares "nocell" in parameters, so it needs to
+    # instance the cell and set properties.
+
+    # Instantiate the cell.  The name corresponds to the cell in the sky130_fd_pr_* directory.
+    set instname [getcell ${devname}]
+
+    set deltax [magic::spice2float $deltax] 
+    set deltay [magic::spice2float $deltay] 
+    set xstep [magic::spice2float $xstep] 
+    set ystep [magic::spice2float $ystep] 
+
+    # Array stepping
+    if {$nx > 1 || $ny > 1} {
+        set xstep [expr $xstep + $deltax]
+        set ystep [expr $ystep + $deltay]
+        box size ${xstep}um ${ystep}um
+	array $nx $ny
+    }
+    select cell $instname
+    expand
+    return $instname
+}
+
+#----------------------------------------------------------------
+# No additional parameters declared for drawing
+#----------------------------------------------------------------
+
+proc sky130::sky130_fd_pr_rf_npn_1x1_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf_npn_1x1 $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_npn_1x2_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf_npn_1x2 $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_pnp5x_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf_pnp5x $parameters]
+}
+
+proc sky130::balun_draw {parameters} {
+    return [sky130::fixed_draw balun $parameters]
+}
+
+proc sky130::xind4_011_draw {parameters} {
+    return [sky130::fixed_draw xind4_011 $parameters]
+}
+
+proc sky130::xind4_02_draw {parameters} {
+    return [sky130::fixed_draw xind4_02 $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_lim5shield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf2_xcmvpp11p5x11p7_lim5shield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_m3_lim5shield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf2_xcmvpp11p5x11p7_m3_lim5shield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_m4shield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf2_xcmvpp11p5x11p7_m4shield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym4shield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym4shield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym50p4shield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym50p4shield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp4p4x4p6_m3_lim5shield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf2_xcmvpp4p4x4p6_m3_lim5shield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp6p8x6p1_lim4shield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf2_xcmvpp6p8x6p1_lim4shield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp6p8x6p1_polym4shield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf2_xcmvpp6p8x6p1_polym4shield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp8p6x7p9_m3_lim5shield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf2_xcmvpp8p6x7p9_m3_lim5shield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvppx4_2xnhvnative10x4_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf2_xcmvppx4_2xnhvnative10x4 $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp11p5x11p7_m3_lishield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf_xcmvpp11p5x11p7_m3_lishield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp11p5x11p7_m3shield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf_xcmvpp11p5x11p7_m3shield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp1p8x1p8_lishield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf_xcmvpp1p8x1p8_lishield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp1p8x1p8_m3shield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf_xcmvpp1p8x1p8_m3shield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp2_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf_xcmvpp2 $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp2_nwell_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf_xcmvpp2_nwell $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp4p4x4p6_m3_lishield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf_xcmvpp4p4x4p6_m3_lishield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp4p4x4p6_m3shield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf_xcmvpp4p4x4p6_m3shield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp8p6x7p9_m3_lishield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf_xcmvpp8p6x7p9_m3_lishield $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp8p6x7p9_m3shield_draw {parameters} {
+    return [sky130::fixed_draw sky130_fd_pr_rf_xcmvpp8p6x7p9_m3shield $parameters]
+}
+
+#----------------------------------------------------------------
+# Fixed device: Check device parameters for out-of-bounds values
+#----------------------------------------------------------------
+
+proc sky130::fixed_check {parameters} {
+
+    # Set a local variable for each parameter (e.g., $l, $w, etc.)
+    foreach key [dict keys $parameters] {
+        set $key [dict get $parameters $key]
+    }
+
+    # Normalize distance units to microns
+    set deltax [magic::spice2float $deltax -1] 
+    set deltax [magic::3digitpastdecimal $deltax]
+    set deltay [magic::spice2float $deltay -1] 
+    set deltay [magic::3digitpastdecimal $deltay]
+
+    # nx, ny must be integer
+    if {![string is int $nx]} {
+	puts stderr "NX must be an integer!"
+        dict set parameters nx 1
+    }
+    if {![string is int $ny]} {
+	puts stderr "NY must be an integer!"
+        dict set parameters nx 1
+    }
+
+    # Number of devices in X and Y must be at least 1
+    if {$nx < 1} {
+	puts stderr "NX must be >= 1"
+        dict set parameters nx 1
+    }
+    if {$ny < 1} {
+	puts stderr "NY must be >= 1"
+        dict set parameters nx 1
+    }
+    # Step less than zero violates DRC
+    if {$deltax < 0} {
+	puts stderr "X step must be >= 0"
+        dict set parameters deltax 0
+    }
+    if {$deltay < 0} {
+	puts stderr "Y step must be >= 0"
+        dict set parameters deltay 0
+    }
+    return $parameters
+}
+
+#----------------------------------------------------------------
+
+proc sky130::sky130_fd_pr_rf_npn_1x1_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_npn_1x2_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_pnp5x_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::balun_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::xind4_011_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::xind4_02_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_lim5shield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_m3_lim5shield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_m4shield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym4shield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym50p4shield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp4p4x4p6_m3_lim5shield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp6p8x6p1_lim4shield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp6p8x6p1_polym4shield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvpp8p6x7p9_m3_lim5shield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf2_xcmvppx4_2xnhvnative10x4_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp11p5x11p7_m3_lishield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp11p5x11p7_m3shield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp1p8x1p8_lishield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp1p8x1p8_m3shield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp2_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp2_nwell_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp4p4x4p6_m3_lishield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp4p4x4p6_m3shield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp8p6x7p9_m3_lishield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
+proc sky130::sky130_fd_pr_rf_xcmvpp8p6x7p9_m3shield_check {parameters} {
+    return [sky130::fixed_check $parameters]
+}
+
diff --git a/sky130/sky130.tech b/sky130/sky130.tech
new file mode 100644
index 0000000..881eee2
--- /dev/null
+++ b/sky130/sky130.tech
@@ -0,0 +1,4004 @@
+###
+###	Source file sky130.tech
+###	Process this file with the preproc.py macro processor
+###	Note that the tech name is always TECHNAME for
+###	magic;  this keeps compatibility between layouts
+###	for all process variants.
+###
+#----------------------------------------------------------
+# Copyright (c) 2020 R. Timothy Edwards
+# Revisions:  See below
+#
+# This file is an Open Source foundry process describing
+# the SkyWater S8 hybrid 0.18um / 0.13um fabrication
+# process.  The file may be distributed under the terms
+# of the (Apache 2.0(?)) license agreement.
+#
+#----------------------------------------------------------
+# This file is designed to be used with magic versions
+# 8.3.24 or newer.
+#----------------------------------------------------------
+tech
+  format 35
+  TECHNAME
+end
+
+version
+ version REVISION
+ description "SkyWater SKY130: PRE ALPHA Vendor Open Source rules and DRC"
+end
+
+#----------------------------------------------------------
+# Status: 3/17/19: s8.tech created from xh018.tech
+#
+# Status: 3/20/19: Rev 0 (pre-alpha):
+# Work in progress.  Converted from original techfile to S8
+# with all sections updated with as much information as could
+# be immediately gleaned from the documentation.  Cifinput and
+# DRC sections have been checked against one standard cell
+# library.
+#
+# Status 5/5/20: Rev 1 (alpha):
+# Changed name from s8 to sky130
+#--------------------------------------------------------------
+
+#--------------------------------------------------------------
+# Supported device types
+#--------------------------------------------------------------
+# device name   magic ID layer  description
+#-------------------------------------------------------------
+# nshort	nfet		standard nFET
+# nshort	scnfet		standard nFET in standard cell**
+# nlowvt	nfetlvt		low Vt nFET
+# sonos_p/e	nsonos		SONOS nFET
+# pshort	pfet		standard pFET
+# pshort	scpfet		standard pFET in standard cell**
+# plowvt	pfetlvt		low Vt pFET
+# phighvt	pfethvt		high Vt pFET
+# ntvnative	---		native nFET
+# phv		mvpfet		thickox pFET
+# nhv		mvnfet		thickox nFET
+# nhvnative	mvnnfet		thickox native nFET
+# ndiode	ndiode		n+ diff diode
+# ndiode_h	mvndiode	thickox n+ diff diode
+# pdiode	pdiode		p+ diff diode
+# pdiode_h	mvpdiode	thickox p+ diff diode
+# ndiode_native	nndiode		diode with nndiff
+# ndiode_lvt	ndiodelvt	low Vt n+ diff diode
+# pdiode_lvt	pdiodelvt	low Vt p+ diff diode
+# pdiode_hvt	pdiodehvt	high Vt p+ diff diode
+# nwdiode	---		nwell diode
+# dnwdiode_psub	---		deep nwell diode to substrate
+# dnwdiode_pw	---		deep nwell diode to pwell
+# xcmimc1	mimcap		MiM cap 1st plate
+# xcmimc2	mimcap2		MiM cap 2nd plate
+# mrdn		rdn		n+ diff resistor
+# mrdn_hv	mvrdn		thickox n+ diff resistor
+# mrdp		rdp		p+ diff resistor
+# mrdp_hv	mvrdp		thickox p+ diff resistor
+# mrl1		rli		local interconnect resistor
+# mrp1		npres		n+ poly resistor
+# xhrpoly_*	ppres (*)	p+ poly resistor (300 Ohms/sq)
+# uhrpoly_*	xres (*)	p+ poly resistor (2k Ohms/sq)
+# xcnwvc	varactor	varactor (low Vt?)
+# xcnwvc2	varactorhvt	high Vt varactor
+# xchvnwc	mvvaractor	thickox varactor
+# xpwres	rpw		pwell resistor (in deep nwell)
+#
+# (*) Note that ppres may extract into some generic type
+# called "xhrpoly", but only specific sizes of xhrpoly are
+# allowed, and these are created from fixed layouts like the
+# types below.
+#
+# (**) nFET and pFET in standard cells are the same as devices
+# outside of the standard cell except for the DRC rule for
+# FET to diffusion contact spacing (which is 0.05um, not 0.055um)
+#
+# To avoid creating a large number of types, a few ID layers are
+# used in conjunction with standard devices types:  "lvt" for
+# low threshold voltage, and "hvt" for high threshold voltage.
+# "dnwell" is used as an identifier layer where appropriate.
+# Layer HVI (thick oxide) is treated differently, and types
+# "mv*" are defined where thick oxide is required.
+#
+#-------------------------------------------------------------
+# The following devices are not extracted but are represented
+# only by script-generated subcells in the PDK.
+#-------------------------------------------------------------
+# nshortesd			ESD nFET
+# nhvesd			ESD thickox nFET
+# nhvnativeesd			ESD native nFET
+# phvesd			ESD thickox pFET
+# fnpass			flash nFET device
+# npnpar1x*			parasitic NPN
+# npn_1x1_2p0_hv		thickox gated parasitic NPN
+# pnppar			parasitic PNP
+# pnppar5x			parasitic PNP
+# xesd_ndiode_h_***		ESD n+ diode
+# xesd_pdiode_h_***		ESD p+ diode
+# reslocsub			local substrate island indicator
+# xcmvpp			Vpp cap
+# xcmvpp_2			Vpp cap
+# xcmvpp_*			Vpp cap
+# xcmvpp*			Vpp cap
+# balun				balun inductor
+# ind4				inductor
+# fuse				metal fuse device
+#--------------------------------------------------------------
+
+#-----------------------------------------------------
+# Tile planes
+#-----------------------------------------------------
+
+planes
+  dwell,dw
+  well,w
+  active,a
+  locali,li1,li
+  metal1,m1
+  metal2,m2
+  metal3,m3
+#ifdef METAL5
+#ifdef MIM
+  cap1,c1
+#endif (MIM)
+  metal4,m4
+#ifdef MIM
+  cap2,c2
+#endif (MIM)
+  metal5,m5
+#endif (METAL5)
+#ifdef REDISTRIBUTION
+  metali,mi
+#endif
+  block,b
+  comment,c
+end
+
+#-----------------------------------------------------
+# Tile types
+#-----------------------------------------------------
+
+types
+# Deep nwell
+  dwell dnwell,dnw
+
+# Wells
+  well nwell,nw
+ -well pwell,pw
+ -well rpw,rpwell
+ -well obswell
+
+# Transistors
+  active nmos,ntransistor,nfet
+ -active scnmos,scntransistor,scnfet
+  active pmos,ptransistor,pfet
+ -active scpmos,scptransistor,scpfet
+ -active nnmos,nntransistor
+  active mvnmos,mvntransistor,mvnfet
+  active mvpmos,mvptransistor,mvpfet
+ -active mvnnmos,mvnntransistor,mvnnfet,nnfet
+ -active varactor,varact,var
+ -active mvvaractor,mvvaract,mvvar
+
+ -active pmoslvt,pfetlvt
+ -active pmoshvt,pfethvt
+ -active nmoslvt,nfetlvt
+ -active varactorhvt,varacthvt,varhvt
+ -active nsonos,sonos
+
+# Diffusions
+  active ndiff,ndiffusion,ndif
+  active pdiff,pdiffusion,pdif
+ -active mvndiff,mvndiffusion,mvndif
+ -active mvpdiff,mvpdiffusion,mvpdif
+  active ndiffc,ndcontact,ndc
+  active pdiffc,pdcontact,pdc
+ -active mvndiffc,mvndcontact,mvndc
+ -active mvpdiffc,mvpdcontact,mvpdc
+  active psubdiff,psubstratepdiff,ppdiff,ppd,psd
+  active nsubdiff,nsubstratendiff,nndiff,nnd,nsd
+ -active mvpsubdiff,mvpsubstratepdiff,mvppdiff,mvppd,mvpsd
+ -active mvnsubdiff,mvnsubstratendiff,mvnndiff,mvnnd,mvnsd
+  active psubdiffcont,psubstratepcontact,psc
+  active nsubdiffcont,nsubstratencontact,nsc
+ -active mvpsubdiffcont,mvpsubstratepcontact,mvpsc
+ -active mvnsubdiffcont,mvnsubstratencontact,mvnsc
+ -active obsactive
+ -active mvobsactive
+
+# Poly
+  active poly,p,polysilicon
+  active polycont,pc,pcontact,polycut,polyc
+  active xpolycontact,xpolyc,xpc
+
+# Resistors
+ -active npolyres,npres,mrp1
+ -active ppolyres,ppres,xhrpoly
+ -active xpolyres,xpres,xres,uhrpoly
+ -active ndiffres,rnd,rdn,rndiff
+ -active pdiffres,rpd,rdp,rpdiff
+ -active mvndiffres,mvrnd,mvrdn,mvrndiff
+ -active mvpdiffres,mvrpd,mvrdp,mvrpdiff
+ -active rmp
+
+# Diodes
+ -active pdiode,pdi
+ -active ndiode,ndi
+ -active nndiode,nndi
+ -active pdiodec,pdic
+ -active ndiodec,ndic
+ -active nndiodec,nndic
+ -active mvpdiode,mvpdi
+ -active mvndiode,mvndi
+ -active mvpdiodec,mvpdic
+ -active mvndiodec,mvndic
+ -active pdiodelvt,pdilvt
+ -active pdiodehvt,pdihvt
+ -active ndiodelvt,ndilvt
+ -active pdiodelvtc,pdilvtc
+ -active pdiodehvtc,pdihvtc
+ -active ndiodelvtc,ndilvtc
+
+# Local Interconnect 
+  locali locali,li1,li
+ -locali corelocali,coreli1,coreli
+ -locali rlocali,rli1,rli
+  locali viali,vial,lic,licon,m1c,v0
+ -locali obsli1,obsli
+ -locali obsli1c,obslic,obslicon
+
+# Metal 1
+  metal1 metal1,m1,met1
+ -metal1 rmetal1,rm1,rmet1
+  metal1 via1,m2contact,m2cut,m2c,via,v,v1
+ -metal1 obsm1
+ -metal1 padl
+
+# Metal 2
+  metal2 metal2,m2,met2
+ -metal2 rmetal2,rm2,rmet2
+  metal2 via2,m3contact,m3cut,m3c,v2
+ -metal2 obsm2
+
+# Metal 3
+  metal3 metal3,m3,met3
+ -metal3 rmetal3,rm3,rmet3
+ -metal3 obsm3
+#ifdef METAL5
+  metal3 via3,v3
+
+#ifdef MIM
+ -cap1 mimcap,mim,capm
+ -cap1 mimcapcontact,mimcapc,mimcc,capmc
+#endif
+
+# Metal 4
+  metal4 metal4,m4,met4
+ -metal4 rmetal4,rm4,rmet4
+ -metal4 obsm4
+  metal4 via4,v4
+
+#ifdef MIM
+ -cap2 mimcap2,mim2,capm2
+ -cap2 mimcap2contact,mimcap2c,mim2cc,capm2c
+#endif
+
+# Metal 5
+  metal5 metal5,m5,met5
+ -metal5 rm5,rmetal5,rmet5
+ -metal5 obsm5
+#endif (METAL5)
+
+#ifdef REDISTRIBUTION
+ -metal5 mrdlcontact,mrdlc
+ -metali metalrdl,mrdl,metrdl
+ -metali obsmrdl
+#endif (REDISTRIBUTION)
+
+# Miscellaneous
+ -block  glass
+ -block  fillblock
+ -comment comment
+ -comment obscomment
+
+end
+
+#-----------------------------------------------------
+# Magic contact types
+#-----------------------------------------------------
+
+contact
+  pc       poly       locali
+  ndc      ndiff      locali
+  pdc      pdiff      locali
+  nsc      nsd        locali
+  psc      psd        locali
+  ndic     ndiode     locali
+  ndilvtc  ndiodelvt  locali
+  nndic    nndiode    locali
+  pdic     pdiode     locali
+  pdilvtc  pdiodelvt  locali
+  pdihvtc  pdiodehvt  locali
+  xpc      xpc        locali
+
+  mvndc   mvndiff   locali
+  mvpdc   mvpdiff   locali
+  mvnsc   mvnsd     locali
+  mvpsc   mvpsd     locali
+  mvndic  mvndiode  locali
+  mvpdic  mvpdiode  locali
+
+  lic locali metal1
+  obslic obsli obsm1
+
+  via1   metal1 metal2
+  via2   metal2 metal3
+#ifdef METAL5
+  via3   metal3 metal4
+  via4   metal4 metal5
+#endif (METAL5)
+  stackable
+
+#ifdef METAL5
+#ifdef MIM
+  # MiM cap contacts are not stackable!
+  mimcc  mimcap metal4
+  mim2cc mimcap2 metal5
+#endif (MIM)
+
+  padl m1 m2 m3 m4 m5 glass
+#else
+  padl m1 m2 m3 glass
+#endif  (!METAL5)
+
+#ifdef REDISTRIBUTION
+  mrdlc metal5 mrdl
+#endif (REDISTRIBUTION)
+end
+
+#-----------------------------------------------------
+# Layer aliases
+#-----------------------------------------------------
+
+aliases
+
+  allwellplane     nwell
+  allnwell	   nwell,obswell
+
+  allnfets	   nfet,scnfet,mvnfet,mvnnfet,nfetlvt,nsonos
+  allpfets	   pfet,scpfet,mvpfet,pfethvt,pfetlvt
+  allfets	   allnfets,allpfets,varactor,mvvaractor,varhvt
+
+  allnactivenonfet *ndiff,*nsd,*ndiode,*nndiode,*mvndiff,*mvnsd,*mvndiode,*ndiodelvt
+  allnactive	   allnactivenonfet,allnfets
+  allnactivenontap *ndiff,*ndiode,*nndiode,*mvndiff,*mvndiode,*ndiodelvt,allnfets
+  allnactivetap	   *nsd,*mvnsd,var,varhvt,mvvar
+
+  allpactivenonfet *pdiff,*psd,*pdiode,*mvpdiff,*mvpsd,*mvpdiode,*pdiodelvt,*pdiodehvt
+  allpactive	   allpactivenonfet,allpfets
+  allpactivenontap *pdiff,*pdiode,*mvpdiff,*mvpdiode,*pdiodelvt,*pdiodehvt,allpfets
+  allpactivetap    *psd,*mvpsd
+
+  allactivenonfet  allnactivenonfet,allpactivenonfet
+  allactive	   allactivenonfet,allfets
+
+  allactiveres	   ndiffres,pdiffres,mvndiffres,mvpdiffres
+
+  allndifflv       *ndif,*nsd,*ndiode,ndiffres,nfet,scnfet,nfetlvt,nsonos
+  allpdifflv       *pdif,*psd,*pdiode,pdiffres,pfet,scpfet,pfetlvt,pfethvt
+  alldifflv        allndifflv,allpdifflv
+  allndifflvnonfet *ndif,*nsd,*ndiode,*nndiode,ndiffres,*ndiodelvt
+  allpdifflvnonfet *pdif,*psd,*pdiode,pdiffres,*pdiodelvt,*pdiodehvt
+  alldifflvnonfet  allndifflvnonfet,allpdifflvnonfet
+
+  allndiffmv       *mvndif,*mvnsd,*mvndiode,*nndiode,mvndiffres,mvnfet,mvnnfet
+  allpdiffmv       *mvpdif,*mvpsd,*mvpdiode,mvpdiffres,mvpfet
+  alldiffmv        allndiffmv,allpdiffmv
+  allndiffmvnontap *mvndif,*mvndiode,*nndiode,mvndiffres,mvnfet,mvnnfet
+  allpdiffmvnontap *mvpdif,*mvpdiode,mvpdiffres,mvpfet
+  alldiffmvnontap  allndiffmvnontap,allpdiffmvnontap
+  allndiffmvnonfet *mvndif,*mvnsd,*mvndiode,*nndiode,mvndiffres
+  allpdiffmvnonfet *mvpdif,*mvpsd,*mvpdiode,mvpdiffres
+  alldiffmvnonfet  allndiffmvnonfet,allpdiffmvnonfet
+
+  alldiffnonfet	   alldifflvnonfet,alldiffmvnonfet
+  alldiff	   alldifflv,alldiffmv
+
+  allpolyres	   mrp1,xhrpoly,uhrpoly,rmp
+  allpolynonfet	   *poly,allpolyres,xpc
+  allpolynonres	   *poly,allfets,xpc
+
+  allpoly	   allpolynonfet,allfets
+  allpolynoncap	   *poly,xpc,allfets,allpolyres
+
+  allndiffcontlv   ndc,nsc,ndic,nndic,ndilvtc
+  allpdiffcontlv   pdc,psc,pdic,pdilvtc,pdihvtc
+  allndiffcontmv   mvndc,mvnsc,mvndic
+  allpdiffcontmv   mvpdc,mvpsc,mvpdic
+  allndiffcont	   allndiffcontlv,allndiffcontmv
+  allpdiffcont	   allpdiffcontlv,allpdiffcontmv
+  alldiffcontlv	   allndiffcontlv,allpdiffcontlv
+  alldiffcontmv	   allndiffcontmv,allpdiffcontmv
+  alldiffcont	   alldiffcontlv,alldiffcontmv
+
+  allcont	alldiffcont,pc
+
+  allres	allpolyres,allactiveres
+
+  allli		*locali,coreli,rli
+  allm1		*m1,rm1
+  allm2		*m2,rm2
+  allm3		*m3,rm3
+#ifdef METAL5
+  allm4	   	*m4,rm4
+  allm5	   	*m5,rm5
+#endif (METAL5)
+
+  allpad	padl
+
+  psub		pwell
+  
+end
+
+#-----------------------------------------------------
+# Layer drawing styles
+#-----------------------------------------------------
+
+styles
+ styletype mos
+  dnwell    cwell
+  nwell     nwell
+  pwell	    pwell
+  rpwell    pwell 	ptransistor_stripes
+  ndiff     ndiffusion
+  pdiff     pdiffusion
+  nsd       ndiff_in_nwell
+  psd       pdiff_in_pwell
+  nfet      ntransistor    ntransistor_stripes
+  scnfet    ntransistor    ntransistor_stripes
+  pfet      ptransistor    ptransistor_stripes
+  scpfet    ptransistor    ptransistor_stripes
+  var       polysilicon    ndiff_in_nwell
+  ndc       ndiffusion     metal1  contact_X'es
+  pdc       pdiffusion     metal1  contact_X'es
+  nsc       ndiff_in_nwell metal1  contact_X'es
+  psc       pdiff_in_pwell metal1  contact_X'es
+
+  pfetlvt   ptransistor	ptransistor_stripes implant1
+  pfethvt   ptransistor ptransistor_stripes implant2
+  nfetlvt   ntransistor ntransistor_stripes implant1
+  nsonos    ntransistor implant3
+  varhvt    polysilicon ndiff_in_nwell implant2
+
+  mvndiff   ndiffusion     hvndiff_mask
+  mvpdiff   pdiffusion     hvpdiff_mask
+  mvnsd     ndiff_in_nwell hvndiff_mask
+  mvpsd     pdiff_in_pwell hvpdiff_mask
+  mvnfet    ntransistor    ntransistor_stripes hvndiff_mask
+  mvnnfet   ntransistor    ndiff_in_nwell hvndiff_mask
+  mvpfet    ptransistor    ptransistor_stripes
+  mvvar     polysilicon    ndiff_in_nwell hvndiff_mask
+  mvndc     ndiffusion     metal1  contact_X'es hvndiff_mask
+  mvpdc     pdiffusion     metal1  contact_X'es hvpdiff_mask
+  mvnsc     ndiff_in_nwell metal1  contact_X'es hvndiff_mask
+  mvpsc     pdiff_in_pwell metal1  contact_X'es hvpdiff_mask
+
+  poly      polysilicon 
+  pc        polysilicon    metal1  contact_X'es
+  npolyres  polysilicon    silicide_block nselect2
+  ppolyres  polysilicon    silicide_block pselect2
+  xpc	    polysilicon	   pselect2  metal1  contact_X'es
+  rmp	    polysilicon	   poly_resist_stripes
+
+  pdiode    pdiffusion     pselect2
+  ndiode    ndiffusion     nselect2
+  pdiodec   pdiffusion     pselect2 metal1 contact_X'es
+  ndiodec   ndiffusion     nselect2 metal1 contact_X'es
+
+  nndiode   ndiffusion  nselect2 implant3
+  ndiodelvt ndiffusion	nselect2 implant1
+  pdiodelvt pdiffusion  pselect2 implant1
+  pdiodehvt pdiffusion  pselect2 implant2
+  pdilvtc   pdiffusion  pselect2 implant1 metal1 contact_X'es
+  pdihvtc   pdiffusion  pselect2 implant2 metal1 contact_X'es
+  ndilvtc   ndiffusion  nselect2 implant1 metal1 contact_X'es
+
+  mvpdiode    pdiffusion     pselect2 hvpdiff_mask
+  mvndiode    ndiffusion     nselect2 hvndiff_mask
+  mvpdiodec   pdiffusion     pselect2 metal1 contact_X'es hvpdiff_mask
+  mvndiodec   ndiffusion     nselect2 metal1 contact_X'es hvndiff_mask
+  nndiodec    ndiff_in_nwell nselect2 metal1 contact_X'es hvndiff_mask
+
+  locali    metal1
+  coreli    metal1
+  rli       metal1         poly_resist_stripes
+  lic	    metal1	   metal2 via1arrow
+  obsli     metal1
+  obslic    metal1	   metal2 via1arrow
+
+  metal1    metal2
+  rm1       metal2         poly_resist_stripes
+  obsm1     metal2
+  m2c       metal2         metal3  via2arrow
+  metal2    metal3
+  rm2       metal3         poly_resist_stripes
+  obsm2     metal3
+  m3c       metal3         metal4  via3alt
+  metal3    metal4
+  rm3       metal4         poly_resist_stripes
+  obsm3     metal4
+#ifdef METAL5
+#ifdef MIM
+  mimcap    metal3         mems
+  mimcc     metal3         contact_X'es mems
+  mimcap2   metal4         mems
+  mim2cc    metal4         contact_X'es mems
+#endif (MIM)
+  via3      metal4         metal5  via4
+  metal4    metal5
+  rm4       metal5         poly_resist_stripes
+  obsm4     metal5
+  via4      metal5         metal6  via5
+  metal5    metal6
+  rm5       metal6         poly_resist_stripes
+  obsm5     metal6
+#endif (METAL5)
+#ifdef REDISTRIBUTION
+  mrdlc	    metal6  metal7  via6
+  metalrdl  metal7
+  obsmrdl   metal7
+#endif (REDISTRIBUTION)
+
+  glass	    overglass
+  mrp1      poly_resist    poly_resist_stripes
+  xhrpoly   poly_resist    silicide_block
+  uhrpoly   poly_resist
+  ndiffres  ndiffusion	   ndop_stripes
+  pdiffres  pdiffusion	   pdop_stripes
+  mvndiffres  ndiffusion hvndiff_mask   ndop_stripes
+  mvpdiffres  pdiffusion hvpdiff_mask   pdop_stripes
+  comment   comment
+  error_p   error_waffle
+  error_s   error_waffle
+  error_ps  error_waffle
+  fillblock cwell
+
+  obswell   cwell
+  obsactive implant4
+
+#ifndef METAL5
+  padl      metal4 via4 overglass
+#else
+  padl      metal6 via6 overglass
+#endif
+
+  magnet    substrate_field_implant
+  rotate    via3alt
+  fence     via5
+end
+
+#-----------------------------------------------------
+# Special paint/erase rules
+#-----------------------------------------------------
+
+compose
+  compose  nfet  poly  ndiff
+  compose  pfet  poly  pdiff
+  compose  var   poly  nsd
+
+  compose  mvnfet  poly  mvndiff
+  compose  mvpfet  poly  mvpdiff
+  compose  mvvar   poly  mvnsd
+  
+  paint  ndc     nwell  pdc
+  paint  nfet    nwell  pfet
+  paint  scnfet  nwell  scpfet
+  paint  ndiff   nwell  pdiff
+  paint  psd     nwell  nsd
+  paint  psc     nwell  nsc
+
+  paint  pdc     pwell  ndc
+  paint  pfet    pwell  nfet
+  paint  scpfet  pwell  scnfet
+  paint  pdiff   pwell  ndiff
+  paint  nsd     pwell  psd
+  paint  nsc     pwell  psc
+
+  paint  pdc	 coreli pdc
+  paint  ndc	 coreli ndc
+  paint  pc	 coreli pc
+  paint  nsc 	 coreli pc
+  paint  psc 	 coreli pc
+  paint  viali 	 coreli viali
+
+  paint  coreli  pdc    pdc
+  paint  coreli  ndc    ndc
+  paint  coreli  pc     pc
+  paint  coreli  nsc    nsc
+  paint  coreli  psc    psc
+  paint  coreli  viali  viali
+
+#ifdef METAL5
+  paint  m4      obsm4  m4
+  paint  m5      obsm5  m5
+#endif (METAL5)
+end
+
+#-----------------------------------------------------
+# Electrical connectivity
+#-----------------------------------------------------
+
+connect
+  *nwell,*nsd,*mvnsd,dnwell *nwell,*nsd,*mvnsd,dnwell
+  pwell,*psd,*mvpsd  pwell,*psd,*mvpsd
+  *li,coreli	*li,coreli
+  *m1	*m1
+  *m2	*m2
+  *m3	*m3
+#ifdef METAL5
+  *m4	*m4
+  *m5	*m5
+#ifdef MIM
+  *mimcap     *mimcap
+  *mimcap2    *mimcap2
+#endif (MIM)
+#endif (METAL5)
+   allnactivenonfet	allnactivenonfet
+   allpactivenonfet	allpactivenonfet
+  *poly,xpc,allfets	*poly,xpc,allfets
+#ifdef REDISTRIBUTION
+  # RDL connects to m5 (i.e., padl) through glass cut
+  *mrdl			*mrdl
+  glass			metrdl
+#endif (REDISTRIBUTION)
+end
+
+#-----------------------------------------------------
+# CIF/GDS output layer definitions
+#-----------------------------------------------------
+# NOTE:  All values in this section MUST be multiples of 25 
+# or else magic will scale below the allowed layout grid size
+
+cifoutput
+
+#----------------------------------------------------------------
+style gdsii
+# NOTE: This section is used for actual GDS output
+#----------------------------------------------------------------
+ scalefactor 10  nanometers
+ options calma-permissive-labels
+ gridlimit 5
+
+#----------------------------------------------------------------
+# Create a temp layer from the cell bounding box for use in
+# generating ID layers.  Note that "boundary", unlike "bbox",
+# requires the FIXED_BBOX property (abutment box) in the cell.
+#----------------------------------------------------------------
+ templayer CELLBOUND
+	boundary
+
+#----------------------------------------------------------------
+# BOUND
+#----------------------------------------------------------------
+ layer 	BOUND CELLBOUND
+	calma 235 4
+
+# Create a boundary outside of an abutment box, so that layers
+# can be made to stretch to the abutment box edges.  First strink
+# so that any box that would be so small as to interact with
+# itself will be removed.
+
+ templayer CELLRING CELLBOUND
+	shrink 345
+	grow 545
+	and-not CELLBOUND
+
+#----------------------------------------------------------------
+# DNWELL
+#----------------------------------------------------------------
+
+ layer DNWELL	dnwell
+	calma	64 18
+
+ layer PWRES    rpw
+	and	dnwell
+	calma	64 13
+
+#----------------------------------------------------------------
+# NWELL
+#----------------------------------------------------------------
+
+ layer NWELL 	allnwell
+	bloat-all rpw dnwell
+	and-not rpw,pwell
+ 	calma 	64 20
+
+ layer WELLTXT
+ 	labels allnwell noport
+	calma 64 16
+
+ layer WELLPIN
+ 	labels allnwell port
+	calma 64 5
+
+#----------------------------------------------------------------
+# SUB (text/port only)
+#----------------------------------------------------------------
+
+ layer SUBTXT
+ 	labels pwell noport
+	calma 122 16
+
+ layer SUBPIN
+ 	labels pwell port
+	calma 64 59
+
+#----------------------------------------------------------------
+# DIFF
+#----------------------------------------------------------------
+
+ layer DIFF 	allnactivenontap,allpactivenontap,allactiveres
+ 	labels 	allnactivenontap,allpactivenontap
+ 	calma 	65 20
+
+#----------------------------------------------------------------
+# TAP
+#----------------------------------------------------------------
+
+ layer TAP 	allnactivetap,allpactivetap
+ 	labels 	allnactivetap,allpactivetap
+ 	calma 	65 44
+
+#----------------------------------------------------------------
+# PPLUS, NPLUS (PSDM, NSDM)
+#----------------------------------------------------------------
+
+ templayer basePPLUS pdiffres,mvpdiffres
+	grow	15
+	or	xhrpoly,uhrpoly,xpc
+	grow	110
+	bloat-or allpactivetap * 125 allnactivenontap 0
+	bloat-or allpactivenontap * 125 allnactivetap 0
+	bridge	380 380
+
+ templayer extendPPLUS  basePPLUS,CELLRING
+	grow	185
+	shrink	185
+	and-not	CELLRING
+
+ layer PPLUS basePPLUS,extendPPLUS 
+	close   265000
+	calma	94 20
+
+ templayer baseNPLUS ndiffres,mvndiffres
+ 	grow	125
+	bloat-or allnactivetap * 125 allpactivenontap 0
+	bloat-or allnactivenontap * 125 allpactivetap 0
+	bridge	380 380
+
+ templayer extendNPLUS  baseNPLUS,CELLRING
+ 	grow	185
+ 	shrink	185
+	and-not	CELLRING
+
+ layer NPLUS baseNPLUS,extendNPLUS
+ 	close   265000
+ 	calma	93 44
+
+#----------------------------------------------------------------
+# LVTN
+#----------------------------------------------------------------
+
+ layer LVTN  pfetlvt,nfetlvt,mvvar,mvnnfet,nsonos,*pdiodelvt,*ndiodelvt,*nndiode
+        grow 180
+	bridge	380 380
+	grow	185
+	shrink	185
+	close  265000
+	calma 125 44
+
+#----------------------------------------------------------------
+# HVTP
+#----------------------------------------------------------------
+
+ layer HVTP pfethvt,varhvt,*pdiodehvt
+        grow 180
+	bridge	380 380
+	grow	185
+	shrink	185
+	close 265000
+	calma 78 44
+
+#----------------------------------------------------------------
+# SONOS
+#----------------------------------------------------------------
+
+ layer SONOS nsonos
+	grow 100
+	grow-min 410
+	bridge 500 410
+	grow 250
+	shrink 250
+	calma 80 20
+
+#----------------------------------------------------------------
+# SONOS requires COREID around area (areaid.ce).  Also, the
+# coreli layer indicates a cell needing COREID.
+#----------------------------------------------------------------
+
+ layer COREID
+	bloat-all nsonos,coreli CELLBOUND
+	calma 81 2
+
+#----------------------------------------------------------------
+# STDCELL applies to all cells containing scnfet or scpfet.
+#----------------------------------------------------------------
+
+ layer STDCELL scnfet
+	bloat-all scpfet,scnfet CELLBOUND
+	calma 81 4
+
+#----------------------------------------------------------------
+# RPM
+#----------------------------------------------------------------
+
+ layer RPM
+	bloat-all xhrpoly xpc
+	grow 200
+	grow-min 1270
+	grow 420
+	shrink 420
+	calma 86 20
+
+#----------------------------------------------------------------
+# URPM (2kOhms/sq. poly implant)
+#----------------------------------------------------------------
+
+ layer URPM
+	bloat-all uhrpoly xpc
+	grow 200
+	grow-min 1270
+	grow 420
+	shrink 420
+	calma 79 20
+
+#----------------------------------------------------------------
+# LDNTM (Tip implant for SONOS FETs)
+#----------------------------------------------------------------
+
+ layer LDNTM
+	bloat-all nsonos *ndiff
+	grow 185
+ 	grow 	345
+ 	shrink 	345
+	calma 11 44
+
+#----------------------------------------------------------------
+# HVNTM (Tip implant for MV ndiff devices)
+#----------------------------------------------------------------
+
+ templayer hvntm_block *mvpsd
+	grow 185
+
+ layer HVNTM
+	bloat-all mvnfet,mvnnfet,*mvndiode,mvrdn,*nndiode *mvndiff
+	bloat-all mvvaractor *mvnsd
+	and-not hvntm_block
+        grow 185
+ 	grow 	345
+ 	shrink 	345
+	calma 125 20
+
+#----------------------------------------------------------------
+# POLY
+#----------------------------------------------------------------
+
+ layer POLY 	allpoly
+ 	calma 	66 20
+
+ layer POLYTXT
+	labels  allpoly noport
+	calma	66 16
+
+ layer POLYPIN
+	labels  allpoly port
+	calma	66 5
+
+#----------------------------------------------------------------
+# THKOX (HVI) (includes rules NWELL 8-11 and DIFFTAP 14-26)
+#----------------------------------------------------------------
+
+ templayer baseTHKOX 	*mvpsd
+	grow-min 470
+	or alldiffmv,mvvar
+	grow	185
+        bloat-all alldiffmv nwell
+	grow-min 600
+	bridge	700 600
+
+ templayer extendTHKOX	baseTHKOX,CELLRING
+ 	grow 	345
+ 	shrink 	345
+	and-not	CELLRING
+
+ layer THKOX	baseTHKOX,extendTHKOX
+ 	calma 	75 20
+
+#----------------------------------------------------------------
+# CONT (LICON)
+#----------------------------------------------------------------
+
+ layer CONT allcont
+ 	squares-grid 0 170 170
+ 	calma	66 44
+
+ # Contact for pres is different than other LICON contacts
+ # See rules LICON 1b, 1c (width/length) and 2b (spacing)
+ templayer xpc_horiz xpc
+	shrink 1007
+	grow 1007
+
+ layer CONT xpc
+	and-not xpc_horiz
+	# Force long edge vertical for contacts narrower than 2um
+	# Minimum space is 350 but 520 satisfies no. of contacts rule
+ 	slots 80 190 520 80 2000 350
+ 	calma	66 44
+
+ layer CONT xpc
+	and xpc_horiz
+	# Force long edge vertical for contacts wider than 2um
+	# Minimum space is 350 but 520 satisfies no. of contacts rule
+ 	slots 80 2000 350 80 190 520
+ 	calma	66 44
+
+#----------------------------------------------------------------
+# NPC (Nitride poly cut)
+# surrounds CONT (LICON) on poly only (i.e., pc)
+#----------------------------------------------------------------
+
+ layer NPC pc
+ 	squares-grid 0 170 170
+	grow 100
+	bridge 270 270
+	grow 130
+	shrink 130
+	calma  95 20
+
+ # NPC is also generated on xhrpoly and uhrpoly resistors
+
+ layer NPC xpc,xhrpoly,uhrpoly
+        # xpc surrounds precision_resistor by 0.095um
+	grow 95
+	grow 130
+	shrink 130
+	calma  95 20
+
+#----------------------------------------------------------------
+# Device markers
+#----------------------------------------------------------------
+
+ layer DIFFRES rdn,mvrdn,rdp,mvrdp
+	calma 65 13
+
+ layer POLYRES mrp1
+	calma 66 13
+
+ # POLYSHORT is a poly layer resistor like rli, rm1, etc., for metal layers
+ layer POLYSHORT rmp
+	calma 66 15
+
+ # POLYRES extends to edge of contact cut
+ layer POLYRES xhrpoly,uhrpoly
+	grow 60
+	and xpc
+	or xhrpoly,uhrpoly
+	calma 66 13
+
+ layer DIODE *pdi,*ndi,*nndi,*mvpdi,*mvndi,*pdilvt,*pdihvt,*ndilvt
+        # To be done:  Expand to include anode, cathode, and guard ring
+	calma 81 23
+
+#----------------------------------------------------------------
+# LI
+#----------------------------------------------------------------
+ layer LI allli
+	calma 67 20
+
+ layer LITXT
+ 	labels *locali,coreli noport
+	calma 67 16
+
+ layer LIPIN
+ 	labels *locali,coreli port
+	calma 67 5
+
+ layer LIRES rli
+	labels rli
+	calma 67 13
+
+#----------------------------------------------------------------
+# MCON
+#----------------------------------------------------------------
+ layer MCON lic
+ 	squares-grid 0 170 190
+ 	calma 	67 44
+
+#----------------------------------------------------------------
+# MET1
+#----------------------------------------------------------------
+ layer MET1 	allm1
+ 	calma 	68 20
+
+ layer MET1TXT
+	labels	allm1 noport
+	calma 	68 16
+
+ layer MET1PIN
+	labels	allm1 port
+	calma 	68 5
+
+ layer MET1RES rm1
+	labels rm1
+	calma 68 13
+
+#----------------------------------------------------------------
+# VIA1
+#----------------------------------------------------------------
+ layer VIA1 	via1
+ 	squares-grid 55 150 170
+ 	calma 	68 44
+
+#----------------------------------------------------------------
+# MET2
+#----------------------------------------------------------------
+ layer MET2 	allm2
+ 	calma 	69 20
+
+ layer MET2TXT
+	labels	allm2 noport
+	calma	69 16
+
+ layer MET2PIN
+	labels	allm2 port
+	calma	69 5
+
+ layer MET2RES rm2
+	labels rm2
+	calma 69 13
+
+#----------------------------------------------------------------
+# VIA2
+#----------------------------------------------------------------
+ layer VIA2 	via2
+ 	squares-grid 40 200 200
+ 	calma 	69 44
+
+#----------------------------------------------------------------
+# MET3
+#----------------------------------------------------------------
+ layer MET3 	allm3
+ 	calma 	70 20
+
+ layer MET3TXT
+ 	labels 	allm3 noport
+	calma	70 16 
+
+ layer MET3PIN
+	labels	allm3 port
+	calma	70 5
+
+ layer MET3RES rm3
+	labels rm3
+	calma 70 13
+
+#ifdef METAL5
+#----------------------------------------------------------------
+# VIA3
+#----------------------------------------------------------------
+ layer VIA3	via3
+#ifdef MIM
+	or mimcc
+#endif (MIM)
+ 	squares-grid 60 200 200
+ 	calma 	70 44
+
+#----------------------------------------------------------------
+# MET4
+#----------------------------------------------------------------
+ layer MET4 	allm4
+ 	calma 	71 20
+
+ layer MET4TXT
+	labels	allm4 noport
+	calma	71 16
+
+ layer MET4PIN
+	labels	allm4 port
+	calma	71 5
+
+ layer MET4RES rm4
+	labels rm4
+	calma 71 13
+
+#----------------------------------------------------------------
+# VIA4
+#----------------------------------------------------------------
+ layer VIA4	via4
+#ifdef MIM
+	or mim2cc
+#endif (MIM)
+ 	squares-grid 190 800 800
+ 	calma 	71 44
+
+#----------------------------------------------------------------
+# MET5
+#----------------------------------------------------------------
+ layer MET5 	allm5
+ 	calma 	72 20
+
+ layer MET5TXT
+	labels	allm5 noport
+	calma	72 16
+
+ layer MET5PIN
+	labels	allm5 port
+	calma	72 5
+
+ layer MET5RES rm5
+	labels rm5
+	calma 72 13
+
+#endif (METAL5)
+
+#ifdef REDISTRIBUTION
+#----------------------------------------------------------------
+# RDL
+#----------------------------------------------------------------
+  layer RDL	*metrdl
+	calma   74 20
+
+  layer RDLTXT
+	labels	*metrdl noport
+	calma	74 16
+
+  layer RDLPIN
+	labels  *metrdl port
+	calma	74 5
+
+#endif REDISTRIBUTION
+
+#----------------------------------------------------------------
+# GLASS
+#----------------------------------------------------------------
+ layer GLASS 	glass
+ 	calma 	76 20
+
+#ifdef MIM
+#----------------------------------------------------------------
+# CAPM
+#----------------------------------------------------------------
+ layer CAPM 	*mimcap
+ 	labels 	mimcap
+ 	calma 	89 44
+
+ layer CAPM2 	*mimcap2
+ 	labels 	mimcap2
+ 	calma 	97 44
+#endif (MIM)
+
+#----------------------------------------------------------------
+# Chip top level marker for DRC latchup rules to check 15um
+# distance to taps (otherwise 6um is used)
+#----------------------------------------------------------------
+
+ layer LOWTAPDENSITY
+	bbox top
+	# Clear 200um for pads + 50um for required high tap density
+	# in critical area.
+	shrink 250000
+	calma	81 14
+
+#----------------------------------------------------------------
+# FILLBLOCK
+#----------------------------------------------------------------
+ layer FILLOBSM1 fillblock
+ 	calma 	62 24
+
+ layer FILLOBSM2 fillblock
+ 	calma 	105 52
+
+ layer FILLOBSM3 fillblock
+ 	calma 	107 24
+
+ layer FILLOBSM4 fillblock
+ 	calma 	112 4
+
+ render	DNWELL 	cwell       -0.1    0.1
+ render	NWELL	nwell        0.0    0.2062
+ render DIFF	ndiffusion   0.2062 0.12
+ render TAP	pdiffusion   0.2062 0.12
+ render POLY	polysilicon  0.3262 0.18
+ render CONT	via          0.5062 0.43
+ render LI	metal1       0.9361 0.10
+ render MCON	via          1.0361 0.34
+ render MET1	metal2       1.3761 0.36
+ render VIA1	via          1.7361 0.27
+ render MET2	metal3       2.0061 0.36
+ render VIA2	via          2.3661 0.42
+ render MET3	metal4       2.7861 0.845
+#ifdef METAL5
+ render VIA3	via          3.6311 0.39
+ render MET4	metal5       4.0211 0.845
+ render VIA4	via          4.8661 0.505
+ render MET5	metal6       5.3711 1.26
+ render CAPM	metal8       2.4661 0.2
+ render CAPM2	metal9       3.7311 0.2
+#ifdef REDISTRIBUTION
+ render RDL	metal7      11.8834 4.0
+#endif (!REDISTRIBUTION)
+#endif (!METAL5)
+
+#----------------------------------------------------------------
+style drc
+#----------------------------------------------------------------
+# NOTE:  This style is used for DRC only, not for GDS output
+#----------------------------------------------------------------
+ scalefactor 10  nanometers
+ options calma-permissive-labels
+
+ # Ensure nwell overlaps dnwell at least 0.4um outside and 1.03um inside
+ templayer dnwell_shrink dnwell
+ shrink 1030
+
+ templayer nwell_missing dnwell
+ grow 400
+ and-not dnwell_shrink
+ and-not nwell
+
+ # SONOS nFET devices must be in deep nwell
+ templayer dnwell_missing nsonos
+ and-not dnwell
+
+ # Define MiM cap bottom plate for spacing rule
+ templayer mim_bottom
+ bloat-all *mimcap *metal3
+
+ # Define MiM2 cap bottom plate for spacing rule
+ templayer mim2_bottom
+ bloat-all *mimcap2 *metal4
+
+ # Note that metal fill is performed by the foundry and so is not
+ # an option for a cifoutput style.
+
+ # Check latchup rule (15um minimum from tap LICON center to any
+ # non-tap diffusion.  Note that to count as a tap, the diffusion
+ # must be contacted to LI
+
+ templayer ptap_reach psc,mvpsc
+ and-not dnwell
+ # grow total is 15um.  grow in 0.84um increments to ensure that
+ # no nwell ring is crossed
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 840
+ and-not nwell,dnwell
+ grow 635
+ and-not nwell,dnwell
+
+ templayer ptap_missing *ndiff,*mvndiff
+ and-not dnwell
+ and-not ptap_reach
+
+ templayer ntap_reach nsc,mvnsc
+ # grow total is 15um.  grow in 1.27um increments to ensure that
+ # no nwell ring is crossed.  There is no difference between
+ # ntaps in and out of deep nwell.
+ grow 1270
+ and nwell
+ grow 1270
+ and nwell
+ grow 1270
+ and nwell
+ grow 1270
+ and nwell
+ grow 1270
+ and nwell
+ grow 1270
+ and nwell
+ grow 1270
+ and nwell
+ grow 1270
+ and nwell
+ grow 1270
+ and nwell
+ grow 1270
+ and nwell
+ grow 1270
+ and nwell
+ grow 945
+ and nwell
+ 
+ templayer ntap_missing *pdiff,*mvpdiff
+ and-not dnwell
+ and-not ntap_reach
+
+ templayer dptap_reach psc,mvpsc
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 840
+ and-not nwell
+ and dnwell
+ grow 635
+ and-not nwell
+ and dnwell
+
+ templayer dptap_missing *ndiff,*mvndiff
+ and dnwell
+ and-not dptap_reach
+
+ templayer m1_small_hole *m1
+ close   140000
+
+ templayer m1_hole_empty m1_small_hole
+ and-not *m1
+
+ templayer m2_small_hole *m2
+ close   140000
+
+ templayer m2_hole_empty m2_small_hole
+ and-not *m2
+
+#ifdef EXPERIMENTAL
+#----------------------------------------------------------------
+style paint
+#----------------------------------------------------------------
+# NOTE:  This style is used for database manipulations only via
+# the "cif paint" command.
+#----------------------------------------------------------------
+
+ scalefactor 10  nanometers
+
+ templayer m1grow *m1
+    grow 290
+
+ # layer listrap:  Use the following set of commands to strap local
+ # interconnect wires with metal1 (inside the cursor box) to satisfy
+ # the maximum aspect ratio rule for local interconnect:
+ #
+ #    tech unlock *
+ #    cif ostyle paint
+ #    cif paint m1strap comment
+ #    cif paint m1strap m1
+ #    cif paint listrap licon
+ #    erase comment
+
+ templayer m1strap *li
+    and-not m1grow
+    grow 30
+
+ templayer listrap comment
+    slots 30 170 170 60
+
+#endif (EXPERIMENTAL)
+
+end
+
+#-----------------------------------------------------------------------
+cifinput
+#-----------------------------------------------------------------------
+# NOTE:  All values in this section MUST be multiples of 25 
+# or else magic will scale below the allowed layout grid size
+#-----------------------------------------------------------------------
+
+style  vendorimport
+ scalefactor 10 nanometers
+ gridlimit 5
+
+ options ignore-unknown-layer-labels no-reconnect-labels
+
+#ifndef MIM
+ ignore CAPM
+ ignore CAPM2
+#endif (!MIM)
+#ifndef METAL5
+ ignore MET4,VIA3
+ ignore MET5,VIA4
+#endif
+ ignore NPC
+ ignore SEALID
+ ignore NPNID
+ ignore PNPID
+ ignore CAPID
+ ignore LDNTM
+ ignore HVNTM
+ ignore POLYMOD
+ ignore LOWTAPDENSITY
+
+ layer nwell NWELL,WELLTXT,WELLPIN
+ labels NWELL
+ labels WELLTXT text
+ labels WELLPIN port
+
+ layer pwell SUBTXT,SUBPIN
+ labels SUBTXT text
+ labels SUBPIN port
+
+ layer dnwell DNWELL
+ labels DNWELL
+
+ layer rpw PWRES
+ and DNWELL
+ labels PWRES
+
+ templayer ndiffarea DIFF,DIFFTXT,DIFFPIN
+ and-not POLY
+ and-not NWELL
+ and-not PPLUS
+ and-not DIODE
+ and-not DIFFRES
+ and-not THKOX
+ and NPLUS
+ copyup ndifcheck
+ labels DIFF
+ labels DIFFTXT text
+ labels DIFFPIN port
+ labels TAPPIN port
+
+ layer ndiff ndiffarea
+
+ # Copy ndiff areas up for contact checks
+ templayer xndifcheck ndifcheck
+ copyup ndifcheck
+
+ templayer mvndiffarea DIFF,DIFFTXT,DIFFPIN
+ and-not POLY
+ and-not NWELL
+ and-not PPLUS
+ and-not DIODE
+ and-not DIFFRES
+ and THKOX
+ and NPLUS
+ copyup ndifcheck
+ labels DIFF
+ labels DIFFTXT text
+ labels DIFFPIN port
+
+ layer mvndiff mvndiffarea
+
+ # Copy ndiff areas up for contact checks
+ templayer mvxndifcheck mvndifcheck
+ copyup mvndifcheck
+
+ layer ndiode DIFF
+ and NPLUS
+ and DIODE
+ and-not NWELL
+ and-not POLY
+ and-not PPLUS
+ and-not THKOX
+ and-not LVTN
+ labels DIFF
+
+ layer ndiodelvt DIFF
+ and NPLUS
+ and DIODE
+ and-not NWELL
+ and-not POLY
+ and-not PPLUS
+ and-not THKOX
+ and LVTN
+ labels DIFF
+
+ templayer ndiodearea DIODE
+ and NPLUS
+ and-not THKOX
+ and-not NWELL
+ copyup DIODE,NPLUS
+
+ layer ndiffres DIFFRES
+ and NPLUS
+ and-not THKOX
+ labels DIFF
+
+ templayer pdiffarea DIFF,DIFFTXT,DIFFPIN
+ and-not POLY
+ and NWELL
+ and-not NPLUS
+ and-not DIODE
+ and-not THKOX
+ and PPLUS
+ copyup pdifcheck
+ labels DIFF 
+ labels DIFFTXT text
+ labels DIFFPIN port
+
+ layer pdiff pdiffarea
+
+ layer mvndiode DIFF
+ and NPLUS
+ and DIODE
+ and THKOX
+ and-not POLY
+ and-not PPLUS
+ and-not LVTN
+ labels DIFF
+
+ layer nndiode DIFF
+ and NPLUS
+ and DIODE
+ and THKOX
+ and-not POLY
+ and-not PPLUS
+ and LVTN
+ labels DIFF
+
+ templayer mvndiodearea DIODE
+ and NPLUS
+ and THKOX
+ and-not NWELL
+ copyup DIODE,NPLUS
+
+ layer mvndiffres DIFFRES
+ and NPLUS
+ and THKOX
+ labels DIFF
+
+ templayer mvpdiffarea DIFF,DIFFTXT,DIFFPIN
+ and-not POLY
+ and NWELL
+ and-not NPLUS
+ and THKOX
+ and-not DIODE
+ and-not DIFFRES
+ and PPLUS
+ copyup mvpdifcheck
+ labels DIFF
+ labels DIFFTXT text
+ labels DIFFPIN port
+
+ layer mvpdiff mvpdiffarea
+
+ # Copy pdiff areas up for contact checks
+ templayer xpdifcheck pdifcheck
+ copyup pdifcheck
+
+ layer pdiode DIFF
+ and PPLUS
+ and-not POLY
+ and-not NPLUS
+ and-not THKOX
+ and-not LVTN
+ and-not HVTP
+ and DIODE
+ labels DIFF
+
+ layer pdiodelvt DIFF
+ and PPLUS
+ and-not POLY
+ and-not NPLUS
+ and-not THKOX
+ and LVTN
+ and-not HVTP
+ and DIODE
+ labels DIFF
+
+ layer pdiodehvt DIFF
+ and PPLUS
+ and-not POLY
+ and-not NPLUS
+ and-not THKOX
+ and-not LVTN
+ and HVTP
+ and DIODE
+ labels DIFF
+
+ templayer pdiodearea DIODE
+ and PPLUS
+ and-not THKOX
+ copyup DIODE,PPLUS
+
+ # Define pfet areas as known pdiff, regardless of the presence of a well.
+
+ templayer pfetarea DIFF
+ and-not NPLUS
+ and-not THKOX
+ and POLY
+
+ layer pfet pfetarea
+ and-not LVTN
+ and-not HVTP
+ and-not STDCELL
+ labels DIFF
+
+ layer scpfet pfetarea
+ and-not LVTN
+ and-not HVTP
+ and STDCELL
+ labels DIFF
+
+ layer pfetlvt pfetarea
+ and LVTN
+ labels DIFF
+
+ layer pfethvt pfetarea
+ and HVTP
+ labels DIFF
+
+ # Always force nwell under pfet (nwell encloses pdiff by 0.18)
+ layer nwell pfetarea
+ grow 180
+
+ # Copy mvpdiff areas up for contact checks
+ templayer mvxpdifcheck mvpdifcheck
+ copyup mvpdifcheck
+
+ layer mvpdiode DIFF
+ and PPLUS
+ and-not POLY
+ and-not NPLUS
+ and THKOX
+ and DIODE
+ labels DIFF
+
+ templayer mvpdiodearea DIODE
+ and PPLUS
+ and THKOX
+ copyup DIODE,PPLUS
+
+ # Define pfet areas as known pdiff,
+ # regardless of the presence of a
+ # well.
+
+ templayer mvpfetarea DIFF
+ and-not NPLUS
+ and THKOX
+ and POLY
+
+ layer mvpfet mvpfetarea
+ labels DIFF
+
+ layer pdiff DIFF,DIFFTXT,DIFFPIN
+ and-not NPLUS
+ and-not POLY
+ and-not THKOX
+ and-not DIODE
+ and-not DIFFRES
+ labels DIFF
+ labels DIFFTXT text
+ labels DIFFPIN port
+
+ layer pdiffres DIFFRES
+ and PPLUS
+ and NWELL
+ and-not THKOX
+ labels DIFF
+
+ layer nfet DIFF
+ and POLY
+ and-not PPLUS
+ and NPLUS
+ and-not THKOX
+ and-not LVTN
+ and-not SONOS
+ and-not STDCELL
+ labels DIFF
+
+ layer scnfet DIFF
+ and POLY
+ and-not PPLUS
+ and NPLUS
+ and-not THKOX
+ and-not LVTN
+ and-not SONOS
+ and STDCELL
+ labels DIFF
+
+ layer nfetlvt DIFF
+ and POLY
+ and-not PPLUS
+ and NPLUS
+ and-not THKOX
+ and LVTN
+ and-not SONOS
+ labels DIFF
+
+ layer nsonos DIFF
+ and POLY
+ and-not PPLUS
+ and NPLUS
+ and-not THKOX
+ and LVTN
+ and SONOS
+ labels DIFF
+
+ templayer nsdarea DIFF
+ and NPLUS
+ and NWELL
+ and-not POLY
+ and-not PPLUS
+ and-not THKOX
+ copyup nsubcheck
+
+ layer nsd nsdarea
+ labels DIFF
+
+ layer nsd TAP,TAPPIN
+ and NPLUS
+ labels TAP
+ labels TAPPIN port
+
+ templayer nsdexpand nsdarea
+ grow 500
+
+ # Copy nsub areas up for contact checks
+ templayer xnsubcheck nsubcheck
+ copyup nsubcheck
+
+ templayer psdarea DIFF
+ and PPLUS
+ and-not NWELL
+ and-not POLY
+ and-not NPLUS
+ and-not THKOX
+ and-not pfetexpand
+ copyup psubcheck
+
+ layer psd psdarea
+ labels DIFF
+
+ layer psd TAP,TAPPIN
+ and PPLUS
+ and-not THKOX
+ labels TAP
+ labels TAPPIN port
+
+ templayer psdexpand psdarea
+ grow 500
+
+ layer mvpdiff DIFF,DIFFTXT,DIFFPIN
+ and-not NPLUS
+ and-not POLY
+ and THKOX
+ and mvpfetexpand
+ labels DIFF
+ labels DIFFTXT text
+ labels DIFFPIN port
+
+ layer mvpdiffres DIFFRES
+ and PPLUS
+ and NWELL
+ and THKOX
+ and-not mvrdpioedge
+ labels DIFF
+
+ layer mvnfet DIFF
+ and POLY
+ and-not PPLUS
+ and NPLUS
+ and-not LVTN
+ and THKOX
+ labels DIFF
+
+ layer mvnnfet DIFF
+ and POLY
+ and-not PPLUS
+ and NPLUS
+ and LVTN
+ and THKOX
+ labels DIFF
+
+ templayer mvnsdarea DIFF
+ and NPLUS
+ and NWELL
+ and-not POLY
+ and-not PPLUS
+ and THKOX
+ copyup mvnsubcheck
+
+ layer mvnsd mvnsdarea
+ labels DIFF
+
+ layer mvnsd TAP,TAPPIN
+ and NPLUS
+ and THKOX
+ labels TAP
+ labels TAPPIN port
+
+ templayer mvnsdexpand mvnsdarea
+ grow 500
+
+ # Copy nsub areas up for contact checks
+ templayer mvxnsubcheck mvnsubcheck
+ copyup mvnsubcheck
+
+ templayer mvpsdarea DIFF
+ and PPLUS
+ and-not NWELL
+ and-not POLY
+ and-not NPLUS
+ and THKOX
+ and-not mvpfetexpand
+ copyup mvpsubcheck
+
+ layer mvpsd mvpsdarea
+ labels DIFF
+
+ layer mvpsd TAP,TAPPIN
+ and PPLUS
+ and THKOX
+ labels TAP
+ labels TAPPIN port
+
+ templayer mvpsdexpand mvpsdarea
+ grow 500
+
+ # Copy psub areas up for contact checks
+ templayer xpsubcheck psubcheck
+ copyup psubcheck
+
+ templayer mvxpsubcheck mvpsubcheck
+ copyup mvpsubcheck
+
+ layer psd DIFF
+ and-not PPLUS
+ and-not NPLUS
+ and-not POLY
+ and-not THKOX
+ and-not pfetexpand
+ and psdexpand
+
+ layer nsd DIFF
+ and-not PPLUS
+ and-not NPLUS
+ and-not POLY
+ and-not THKOX
+ and nsdexpand
+
+ layer mvpsd DIFF
+ and-not PPLUS
+ and-not NPLUS
+ and-not POLY
+ and THKOX
+ and-not mvpfetexpand
+ and mvpsdexpand
+
+ layer mvnsd DIFF
+ and-not PPLUS
+ and-not NPLUS
+ and-not POLY
+ and THKOX
+ and mvnsdexpand
+
+ templayer hresarea POLY
+ and RPM
+ grow 3000
+
+ templayer uresarea POLY
+ and URPM
+ grow 3000
+
+ templayer diffresarea DIFFRES
+ and-not THKOX
+ grow 3000
+
+ templayer mvdiffresarea DIFFRES
+ and THKOX
+ grow 3000
+
+ templayer resarea diffresarea,mvdiffresarea,hresarea,uresarea
+
+ layer pfet POLY
+ and DIFF
+ and diffresarea
+ and-not NPLUS
+ and-not STDCELL
+
+ layer scpfet POLY
+ and DIFF
+ and diffresarea
+ and-not NPLUS
+ and STDCELL
+
+ templayer xpolyterm RPM,URPM
+ and POLY
+ and-not POLYRES
+ # add back the 0.06um contact surround in the direction of the resistor
+ grow 60
+ and POLY
+
+ layer xpc xpolyterm
+
+ templayer polyarea POLY
+ and-not POLYRES
+ and-not POLYSHORT
+ and-not DIFF
+ and-not RPM
+ and-not URPM
+ copyup polycheck
+
+ layer poly polyarea,POLYTXT,POLYPIN
+ labels POLY
+ labels POLYTXT text
+ labels POLYPIN port
+
+ # Copy (non-resistor) poly areas up for contact checks
+ templayer xpolycheck polycheck
+ copyup polycheck
+
+ layer mrp1 POLY
+ and POLYRES
+ and-not RPM
+ and-not URPM
+ labels POLY
+
+ layer rmp POLY
+ and POLYSHORT
+ labels POLY
+
+ layer xhrpoly POLY
+ and POLYRES
+ and RPM
+ and-not URPM
+ and PPLUS
+ and NPC
+ and-not xpolyterm
+ labels POLY
+
+ layer uhrpoly POLY
+ and POLYRES
+ and URPM
+ and-not RPM
+ and NPC
+ and-not xpolyterm
+ labels POLY
+
+ templayer ndcbase CONT
+ and DIFF
+ and NPLUS
+ and-not NWELL
+ and LI
+ and-not THKOX
+
+ layer ndc ndcbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or ndcbase
+ labels CONT
+
+ templayer nscbase CONT
+ and DIFF,TAP
+ and NPLUS
+ and NWELL
+ and LI
+ and-not THKOX
+
+ layer nsc nscbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or nscbase
+ labels CONT
+
+ templayer pdcbase CONT
+ and DIFF
+ and PPLUS
+ and NWELL
+ and LI
+ and-not THKOX
+
+ layer pdc pdcbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or pdcbase
+ labels CONT
+
+ templayer pdcnowell CONT
+ and DIFF
+ and PPLUS
+ and pfetexpand
+ and LI
+ and-not THKOX
+
+ layer pdc pdcnowell
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or pdcnowell
+ labels CONT
+
+ templayer pscbase CONT
+ and DIFF,TAP
+ and PPLUS
+ and-not NWELL
+ and-not pfetexpand
+ and LI
+ and-not THKOX
+
+ layer psc pscbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or pscbase
+ labels CONT
+
+ templayer pcbase CONT
+ and POLY
+ and-not DIFF
+ and-not RPM,URPM
+ and LI
+
+ layer pc pcbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or pcbase
+ labels CONT
+
+ templayer ndicbase CONT
+ and DIFF
+ and NPLUS
+ and DIODE
+ and-not POLY
+ and-not PPLUS
+ and-not THKOX
+ and-not LVTN
+
+ layer ndic ndicbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or ndicbase
+ labels CONT
+
+ templayer ndilvtcbase CONT
+ and DIFF
+ and NPLUS
+ and DIODE
+ and-not POLY
+ and-not PPLUS
+ and-not THKOX
+ and LVTN
+
+ layer ndilvtc ndilvtcbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or ndilvtcbase
+ labels CONT
+
+ templayer pdicbase CONT
+ and DIFF
+ and PPLUS
+ and DIODE
+ and-not POLY
+ and-not NPLUS
+ and-not THKOX
+ and-not LVTN
+ and-not HVTP
+
+ layer pdic pdicbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or pdicbase
+ labels CONT
+
+ templayer pdilvtcbase CONT
+ and DIFF
+ and PPLUS
+ and DIODE
+ and-not POLY
+ and-not NPLUS
+ and-not THKOX
+ and LVTN
+ and-not HVTP
+
+ layer pdilvtc pdilvtcbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or pdilvtcbase
+ labels CONT
+
+ templayer pdihvtcbase CONT
+ and DIFF
+ and PPLUS
+ and DIODE
+ and-not POLY
+ and-not NPLUS
+ and-not THKOX
+ and-not LVTN
+ and HVTP
+
+ layer pdihvtc pdihvtcbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or pdihvtcbase
+ labels CONT
+
+ templayer mvndcbase CONT
+ and DIFF
+ and NPLUS
+ and-not NWELL
+ and LI
+ and THKOX
+
+ layer mvndc mvndcbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or mvndcbase
+ labels CONT
+
+ templayer mvnscbase CONT
+ and DIFF,TAP
+ and NPLUS
+ and NWELL
+ and LI
+ and THKOX
+
+ layer mvnsc mvnscbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or mvnscbase
+ labels CONT
+
+ templayer mvpdcbase CONT
+ and DIFF
+ and PPLUS
+ and NWELL
+ and LI
+ and THKOX
+
+ layer mvpdc mvpdcbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or mvpdcbase
+ labels CONT
+
+ templayer mvpdcnowell CONT
+ and DIFF
+ and PPLUS
+ and mvpfetexpand
+ and MET1
+ and THKOX
+
+ layer mvpdc mvpdcnowell
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or mvpdcnowell
+ labels CONT
+
+ templayer mvpscbase CONT
+ and DIFF,TAP
+ and PPLUS
+ and-not NWELL
+ and-not mvpfetexpand
+ and LI
+ and THKOX
+
+ layer mvpsc mvpscbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or mvpscbase
+ labels CONT
+
+ templayer mvndicbase CONT
+ and DIFF
+ and NPLUS
+ and DIODE
+ and-not POLY
+ and-not PPLUS
+ and-not LVTN
+ and THKOX
+
+ layer mvndic mvndicbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or mvndicbase
+ labels CONT
+
+ templayer nndicbase CONT
+ and DIFF
+ and NPLUS
+ and DIODE
+ and-not POLY
+ and-not PPLUS
+ and LVTN
+ and THKOX
+
+ layer nndic nndicbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or nndicbase
+ labels CONT
+
+ templayer mvpdicbase CONT
+ and DIFF
+ and PPLUS
+ and DIODE
+ and-not POLY
+ and-not NPLUS
+ and THKOX
+
+ layer mvpdic mvpdicbase
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or mvpdicbase
+ labels CONT
+
+ layer locali LI,LITXT,LIPIN
+ and-not LIRES,LISHORT
+ and-not COREID
+ labels LI
+ labels LITXT text
+ labels LIPIN port
+
+ layer coreli LI,LITXT,LIPIN
+ and-not LIRES,LISHORT
+ and COREID
+ labels LI
+ labels LITXT text
+ labels LIPIN port
+
+ layer rli LI
+ and LIRES,LISHORT
+ labels LIRES,LISHORT
+
+ layer lic MCON
+ grow 95
+ shrink 95
+ shrink 85
+ grow 85
+ or MCON
+ labels MCON
+
+ layer m1 MET1,MET1TXT,MET1PIN
+ and-not MET1RES,MET1SHORT
+ labels MET1
+ labels MET1TXT text
+ labels MET1PIN port
+
+ layer rm1 MET1
+ and MET1RES,MET1SHORT
+ labels MET1RES,MET1SHORT
+
+#ifdef MIM
+ layer mimcap MET3
+ and CAPM
+ labels CAPM
+
+ layer mimcc VIA3
+ and CAPM
+ grow 60
+ grow 40
+ shrink 40
+ labels CAPM
+
+ layer mimcap2 MET4
+ and CAPM2
+ labels CAPM2
+
+ layer mim2cc VIA4
+ and CAPM2
+ grow 190
+ grow 210
+ shrink 210
+ labels CAPM2
+
+#endif (MIM)
+
+ templayer m2cbase VIA1
+ grow 55
+
+ layer m2c m2cbase
+ grow 30
+ shrink 30
+ shrink 130
+ grow 130
+ or m2cbase
+
+ layer m2 MET2,MET2TXT,MET2PIN
+ and-not MET2RES,MET2SHORT
+ labels MET2
+ labels MET2TXT text
+ labels MET2PIN port
+
+ layer rm2 MET2
+ and MET2RES,MET2SHORT
+ labels MET2RES,MET2SHORT
+
+ templayer m3cbase VIA2
+ grow 40
+
+ layer m3c m3cbase
+ grow 60
+ shrink 60
+ shrink 140 
+ grow 140
+ or m3cbase
+
+ layer m3 MET3,MET3TXT,MET3PIN
+ and-not MET3RES,MET3SHORT
+#ifdef MIM
+ and-not CAPM
+#endif (MIM)
+ labels MET3
+ labels MET3TXT text
+ labels MET3PIN port
+
+ layer rm3 MET3
+ and MET3RES,MET3SHORT
+ labels MET3RES,MET3SHORT
+
+#ifdef (METAL5)
+
+ templayer via3base VIA3
+#ifdef MIM
+ and-not CAPM
+#endif (MIM)
+ grow 60
+
+ layer via3 via3base
+ grow 40
+ shrink 40
+ shrink 160
+ grow 160
+ or via3base
+
+ layer m4 MET4,MET4TXT,MET4PIN
+ and-not MET4RES,MET4SHORT
+#ifdef MIM
+ and-not CAPM2
+#endif (MIM)
+ labels MET4
+ labels MET4TXT text
+ labels MET4PIN port
+
+ layer rm4 MET4
+ and MET4RES,MET4SHORT
+ labels MET4RES,MET4SHORT
+
+ layer m5 MET5,MET5TXT,MET5PIN
+ and-not MET5RES,MET5SHORT
+ labels MET5
+ labels MET5TXT text
+ labels MET5PIN port
+
+ layer rm5 MET5
+ and MET5RES,MET5SHORT
+ labels MET5RES,MET5SHORT
+
+ templayer via4base VIA4
+#ifdef MIM
+ and-not CAPM2
+#endif (MIM)
+ grow 190
+
+ layer via4 via4base
+ grow 210
+ shrink 210
+ shrink 590
+ grow 590
+ or via4base
+#endif (METAL5)
+
+#ifdef REDISTRIBUTION
+ layer metrdl RDL,RDLTXT,RDLPIN
+ labels RDL
+ labels RDLTXT text
+ labels RDLPIN port
+#endif
+
+ # Find diffusion not covered in
+ # NPLUS or PPLUS and pull it into
+ # the next layer up
+
+ templayer gentrans DIFF
+ and-not PPLUS
+ and-not NPLUS
+ and POLY
+ copyup DIFF,POLY
+
+ templayer gendiff DIFF,TAP
+ and-not PPLUS
+ and-not NPLUS
+ and-not POLY
+ copyup DIFF
+
+ # Handle contacts found by copyup
+
+ templayer ndiccopy CONT
+ and LI
+ and DIODE
+ and NPLUS
+ and-not THKOX
+
+ layer ndic ndiccopy
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or ndiccopy
+ labels CONT
+
+ templayer mvndiccopy CONT
+ and LI
+ and DIODE
+ and NPLUS
+ and THKOX
+
+ layer mvndic mvndiccopy
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or mvndiccopy
+ labels CONT
+
+ templayer pdiccopy CONT
+ and LI
+ and DIODE
+ and PPLUS
+ and-not THKOX
+
+ layer pdic pdiccopy
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or pdiccopy
+ labels CONT
+
+ templayer mvpdiccopy CONT
+ and LI
+ and DIODE
+ and PPLUS
+ and THKOX
+
+ layer mvpdic mvpdiccopy
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or mvpdiccopy
+ labels CONT
+
+ templayer ndccopy CONT
+ and ndifcheck
+
+ layer ndc ndccopy
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or ndccopy
+ labels CONT
+
+ templayer mvndccopy CONT
+ and mvndifcheck
+
+ layer mvndc mvndccopy
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or mvndccopy
+ labels CONT
+
+ templayer pdccopy CONT
+ and pdifcheck
+
+ layer pdc pdccopy
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or pdccopy
+ labels CONT
+
+ templayer mvpdccopy CONT
+ and mvpdifcheck
+
+ layer mvpdc mvpdccopy
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or mvpdccopy
+ labels CONT
+
+ templayer pccopy CONT
+ and polycheck
+
+ layer pc pccopy
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or pccopy
+ labels CONT
+
+ templayer nsccopy CONT
+ and nsubcheck
+
+ layer nsc nsccopy
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or nsccopy
+ labels CONT
+
+ templayer mvnsccopy CONT
+ and mvnsubcheck
+
+ layer mvnsc mvnsccopy
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or mvnsccopy
+ labels CONT
+
+ templayer psccopy CONT
+ and psubcheck
+
+ layer psc psccopy
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or psccopy
+ labels CONT
+
+ templayer mvpsccopy CONT
+ and mvpsubcheck
+
+ layer mvpsc mvpsccopy
+ grow 85
+ shrink 85
+ shrink 85
+ grow 85
+ or mvpsccopy
+ labels CONT
+
+ # Find contacts not covered in
+ # metal and pull them into the
+ # next layer up
+ 
+ templayer gencont CONT
+ and LI
+ and-not DIFF,TAP
+ and-not POLY
+ and-not DIODE
+ and-not nsubcheck
+ and-not psubcheck
+ and-not mvnsubcheck
+ and-not mvpsubcheck
+ copyup CONT,LI
+
+ templayer barecont CONT
+ and-not LI
+ and-not nsubcheck
+ and-not psubcheck
+ and-not mvnsubcheck
+ and-not mvpsubcheck
+ copyup CONT
+
+ layer glass GLASS,PADTXT,PADPIN
+ labels GLASS
+ labels PADTXT text
+ labels PADPIN port
+
+ templayer boundary BOUND,STDCELL,PADCELL
+ boundary
+
+ layer comment LVSTEXT
+ labels LVSTEXT text
+
+ layer comment TTEXT
+ labels TTEXT text
+
+ layer fillblock  FILLOBSM1,FILLOBSM2,FILLOBSM3,FILLOBSM4
+ labels FILLOBSM1,FILLOBSM2,FILLOBSM3,FILLOBSM4
+
+# MOS Varactor
+
+ layer var POLY
+ and DIFF
+ and NPLUS
+ and NWELL
+ and-not THKOX
+ and-not HVTP
+ grow 25
+ labels POLY
+
+ layer varhvt POLY
+ and DIFF
+ and NPLUS
+ and NWELL
+ and-not THKOX
+ and HVTP
+ grow 25
+ labels POLY
+
+ layer mvvar POLY
+ and DIFF
+ and NPLUS
+ and NWELL
+ and THKOX
+ grow 25
+ labels POLY
+
+ calma NWELL 64 20
+ calma DIFF 65 20
+ calma DNWELL 64 18
+ calma PWRES 64 13
+ calma TAP  65 44
+ # LVTN
+ calma LVTN 125 44
+ # HVTP
+ calma HVTP 78 44
+ # SONOS (TUNM)
+ calma SONOS 80 20
+ # NPLUS = NSDM
+ calma NPLUS 93 44
+ # PPLUS = PSDM
+ calma PPLUS 94 20
+ # HVI
+ calma THKOX 75 20
+ # NPC
+ calma NPC 95 20
+ # P+ POLY MASK
+ calma RPM 86 20
+ calma URPM 79 20
+ calma LDNTM 11 44
+ calma HVNTM 125 20
+ # Poly resistor ID mark
+ calma POLYRES 66 13
+ # Diffusion resistor ID mark
+ calma DIFFRES 65 13
+ calma POLY 66 20
+ calma POLYMOD 66 83
+ # Diode ID mark
+ calma DIODE 81 23
+ # Bipolar NPN mark
+ calma NPNID 82 20
+ # Bipolar PNP mark
+ calma PNPID 82 20
+ # Capacitor ID
+ calma CAPID 82 64
+ # Core area ID mark
+ calma COREID 81 2
+ # Standard cell ID mark
+ calma STDCELL 81 4
+ # Padframe cell ID mark
+ calma PADCELL 81 3
+ # Seal ring ID mark
+ calma SEALID 81 1
+ # Low tap density ID mark
+ calma LOWTAPDENSITY 81 14
+ 
+ # LICON
+ calma CONT 66 44
+ calma LI   67 20
+ calma MCON 67 44
+
+ calma MET1 68 20
+ calma VIA1 68 44
+ calma MET2 69 20
+ calma VIA2 69 44
+ calma MET3 70 20
+#ifdef METAL5
+ calma VIA3 70 44
+ calma MET4 71 20
+ calma VIA4 71 44
+ calma MET5 72 20
+#endif
+#ifdef REDISTRIBUTION
+ calma RDL 74 20
+#endif
+ calma GLASS 76 20
+
+ calma SUBPIN  64 59
+ calma PADPIN  76 5
+ calma DIFFPIN 65 6
+ calma TAPPIN  65 5
+ calma WELLPIN  64 5
+ calma LIPIN 67 5
+ calma POLYPIN 66 5
+ calma MET1PIN 68 5
+ calma MET2PIN 69 5
+ calma MET3PIN 70 5
+#ifdef METAL5
+ calma MET4PIN 71 5
+ calma MET5PIN 72 5
+#endif
+#ifdef REDISTRIBUTION
+ calma RDLPIN 74 5
+#endif
+
+ calma LIRES 67 13
+ calma MET1RES 68 13
+ calma MET2RES 69 13
+ calma MET3RES 70 13
+#ifdef METAL5
+ calma MET4RES 71 13
+ calma MET5RES 72 13
+#endif
+
+ calma POLYSHORT 66 15
+ calma LISHORT 67 15
+ calma MET1SHORT 68 15
+ calma MET2SHORT 69 15
+ calma MET3SHORT 70 15
+#ifdef METAL5
+ calma MET4SHORT 71 15
+ calma MET5SHORT 72 15
+#endif
+
+ calma SUBTXT 122 16
+ calma PADTXT 76 16
+ calma DIFFTXT 65 16
+ calma POLYTXT 66 16
+ calma WELLTXT 64 16
+ calma LITXT 67 16
+ calma MET1TXT 68 16
+ calma MET2TXT 69 16
+ calma MET3TXT 70 16
+#ifdef METAL5
+ calma MET4TXT 71 16
+ calma MET5TXT 72 16
+#endif
+#ifdef REDISTRIBUTION
+ calma RDLPIN 74 16
+#endif
+
+ calma BOUND 235 4
+
+ calma LVSTEXT 83 44
+
+#ifdef (MIM)
+ calma CAPM 89 44
+ calma CAPM2 97 44
+#endif (MIM)
+
+ calma FILLOBSM1  62  24
+ calma FILLOBSM2  105 52
+ calma FILLOBSM3  107 24
+ calma FILLOBSM4  112 4
+
+end
+
+#-----------------------------------------------------
+# Digital flow maze router cost parameters
+#-----------------------------------------------------
+
+mzrouter
+end
+
+#-----------------------------------------------------
+# Vendor DRC rules
+#-----------------------------------------------------
+
+drc
+
+ style drc variants (fast),(full),(routing)
+
+ scalefactor 10 
+
+ cifstyle drc
+
+ variants (fast),(full)
+
+#-----------------------------
+# DNWELL
+#-----------------------------
+
+ width dnwell 3000 "Deep N-well width < %d (Dnwell 2)"
+ spacing dnwell dnwell 6300 touching_ok "Deep N-well spacing < %d (Dnwell 3)"
+ spacing dnwell allnwell 4500 surround_ok \
+	"Deep N-well spacing to N-well < %d (Nwell 7)"
+ cifmaxwidth nwell_missing 0 bend_illegal \
+	"N-well overlap of Deep N-well < 0.4um outside, 1.03um inside (Nwell 5a, 7)"
+ cifmaxwidth dnwell_missing 0 bend_illegal \
+	"SONOS nFET must be in Deep N-well (Tunm 6a)"
+
+#-----------------------------
+# NWELL
+#-----------------------------
+
+ width allnwell 840 "N-well width < %d (Nwell 1)"
+ spacing allnwell allnwell 1270 touching_ok "N-well spacing < %d (Nwell 2a)"
+
+#-----------------------------
+# DIFF
+#-----------------------------
+
+ width *ndiff,nfet,scnfet,*nsd,*ndiode,ndiffres,*pdiff,pfet,scpfet,*psd,*pdiode,pdiffres \
+	150 "Diffusion width < %d (Diff/tap 1)"
+ width *mvndiff,mvnfet,mvnnfet,*mvndiode,*nndiode,mvndiffres,*mvpdiff,mvpfet,*mvpdiode 290 \
+	"MV Diffusion width < %d (Diff/tap 14)"
+ width *mvnsd,*mvpsd 150 "MV Tap width < %d (Diff/tap 1)"
+ extend *mvpsd *mvndiff 700 "MV Butting tap length < %d (Diff/tap 16)"
+ extend *mvnsd *mvpdiff 700 "MV Butting tap length < %d (Diff/tap 16)"
+ extend *psd *ndiff 290 "Butting tap length < %d (Diff/tap 4)"
+ extend *nsd *pdiff 290 "Butting tap length < %d (Diff/tap 4)"
+ width mvpdiffres 150 "MV P-Diffusion resistor width < %d (Diff/tap 14a)"
+ spacing alldifflv,var,varhvt alldifflv,var,varhvt 270 touching_ok \
+	"Diffusion spacing < %d (Diff/tap 3)"
+ spacing alldiffmvnontap,mvvar alldiffmvnontap,mvvar 300 touching_ok \
+	"MV Diffusion spacing < %d (Diff/tap 15a)"
+ spacing alldiffmv *mvnsd,*mvpsd 270 touching_ok \
+	"MV Diffusion to MV tap spacing < %d (Diff/tap 3)"
+ spacing *mvndiff,mvnfet,mvnnfet,*mvndiode,*nndiode,mvndiffres,mvvar *mvpsd 370 \
+	touching_ok "MV P-Diffusion to MV N-tap spacing < %d (Diff/tap 15b)"
+ spacing *mvnsd,*mvpdiff,mvpfet,mvvar,*mvpdiode *mvpsd,*psd 760 touching_illegal \
+	"MV Diffusion in N-well to P-tap spacing < %d (Diff/tap 20 + Diff/tap 17,19)"
+ spacing *ndiff,*ndiode,nfet allnwell 340 touching_illegal \
+	"N-Diffusion spacing to N-well < %d (Diff/tap 9)"
+ spacing *mvndiff,*mvndiode,mvnfet,mvnnfet allnwell 340 touching_illegal \
+	"N-Diffusion spacing to N-well < %d (Diff/tap 9)"
+ spacing *psd allnwell 130 touching_illegal \
+	"P-tap spacing to N-well < %d (Diff/tap 11)"
+ spacing *mvpsd allnwell 130 touching_illegal \
+	"P-tap spacing to N-well < %d (Diff/tap 11)"
+ surround *nsd allnwell 180 absence_illegal \
+	"N-well overlap of N-tap < %d (Diff/tap 10)"
+ surround *mvnsd allnwell 330 absence_illegal \
+	"N-well overlap of MV N-tap < %d (Diff/tap 19)"
+ surround *pdiff,*pdiode,pfet,scpfet allnwell 180 absence_illegal \
+	"N-well overlap of P-Diffusion < %d (Diff/tap 8)"
+ surround *mvpdiff,*mvpdiode,mvpfet allnwell 330 absence_illegal \
+	"N-well overlap of P-Diffusion < %d (Diff/tap 17)"
+ surround mvvar allnwell 560 absence_illegal \
+	"N-well overlap of MV varactor < %d (LVTN 10 + LVTN 4b)"
+ spacing *mvndiode *mvndiode 1070 touching_ok \
+	"MV N-diode spacing < %d (HVNTM.2 + 2 * HVNTM.3)"
+
+ # Butting junction rules
+ edge4way (*psd)/a ~(*ndiff,*psd)/a 125 ~(*ndiff)/a (*ndiff)/a 125 \
+	"N-Diffusion to P-tap spacing < %d across butted junction"
+ edge4way (*ndiff)/a ~(*ndiff,*psd)/a 125 ~(*psd)/a (*psd)/a 125 \
+	"N-Diffusion to P-tap spacing < %d across butted junction"
+ edge4way (*nsd)/a ~(*pdiff,*nsd)/a 125 ~(*pdiff)/a (*pdiff)/a 125 \
+	"P-Diffusion to N-tap spacing < %d across butted junction"
+ edge4way (*pdiff)/a ~(*pdiff,*nsd)/a 125 ~(*nsd)/a (*nsd)/a 125 \
+	"P-Diffusion to N-tap spacing < %d across butted junction"
+
+ edge4way (*mvpsd)/a ~(*mvndiff,*mvpsd)/a 125 ~(*mvndiff)/a (*mvndiff)/a 125 \
+	"MV N-Diffusion to MV P-tap spacing < %d across butted junction"
+ edge4way (*mvndiff)/a ~(*mvndiff,*mvpsd)/a 125 ~(*mvpsd)/a (*mvpsd)/a 125 \
+	"MV N-Diffusion to MV P-tap spacing < %d across butted junction"
+ edge4way (*mvnsd)/a ~(*mvpdiff,*mvnsd)/a 125 ~(*mvpdiff)/a (*mvpdiff)/a 125 \
+	"MV P-Diffusion to MV N-tap spacing < %d across butted junction"
+ edge4way (*mvpdiff)/a ~(*mvpdiff,*mvnsd)/a 125 ~(*mvnsd)/a (*mvnsd)/a 125 \
+	"MV P-Diffusion to MV N-tap spacing < %d across butted junction"
+
+ variants (full)
+
+ # Latchup rules
+ cifmaxwidth ptap_missing 0 bend_illegal \
+	"N-diff distance to P-tap must be < 15.0um (LU 2)"
+ cifmaxwidth dptap_missing 0 bend_illegal \
+	"N-diff distance to P-tap in deep Nwell must be < 15.0um (LU 2.1)"
+ cifmaxwidth ntap_missing 0 bend_illegal \
+	"P-diff distance to N-tap must be < 15.0um (LU 3)"
+
+ variants *
+
+#-----------------------------
+# POLY
+#-----------------------------
+
+ width allpoly 150 "Poly width < %d (Poly 1a)"
+ spacing allpoly allpoly 210 touching_ok "Poly spacing < %d (Poly 2)"
+ spacing allpolynonfet alldifflvnonfet 75 corner_ok allfets \
+	"Poly spacing to Diffusion < %d (Poly 4a)"
+ spacing npres *nsd 480 touching_illegal \
+	"Poly resistor spacing to N-tap < %d (Poly 9)"
+ overhang *ndiff,rndiff nfet,scnfet 250 "N-Diffusion overhang of nmos < %d (Poly 7)"
+ overhang *mvndiff,mvrndiff mvnfet,mvnnfet 250 \
+	"N-Diffusion overhang of nmos < %d (Poly 7)"
+ overhang *pdiff,rpdiff pfet,scpfet 250 "P-Diffusion overhang of pmos < %d (Poly 7)"
+ overhang *mvpdiff,mvrpdiff mvpfet 250 "P-Diffusion overhang of pmos < %d (Poly 7)"
+ overhang *poly allfets 130 "Poly overhang of transistor < %d (Poly 8)"
+ rect_only allfets "No bends in transistors (Poly 11)"
+ rect_only xhrpoly,uhrpoly "No bends in poly resistors (Poly 11)"
+ extend  xpc/a xhrpoly,uhrpoly 2160 \
+ 	"Poly contact extends poly resistor by < %d (LIcon 1c + LI 5)"
+ spacing xhrpoly,uhrpoly xhrpoly,uhrpoly 1240 touching_illegal \
+	"Distance between precision resistors < %d (RPM 2 + 2 * RPM 3)"
+
+#--------------------------------------------------------------------
+# NPC (Nitride Poly Cut)
+#--------------------------------------------------------------------
+
+# Layer NPC is defined automatically around poly contacts (grow 0.1um)
+
+#--------------------------------------------------------------------
+# CONT (LICON, contact between poly/diff and LI)
+#--------------------------------------------------------------------
+
+ width ndc/li 170 "N-diffusion contact width < %d (LIcon 1)"
+ width nsc/li 170 "N-tap contact width     < %d (LIcon 1)"
+ width pdc/li 170 "P-diffusion contact width < %d (LIcon 1)"
+ width psc/li 170 "P-tap contact width     < %d (LIcon 1)"
+ width ndic/li 170 "N-diode contact width < %d (LIcon 1)"
+ width pdic/li 170 "P-diode contact width < %d (LIcon 1)"
+ width pc/li  170 "Poly contact width        < %d (LIcon 1)"
+
+ width xpc/li  350 "Poly resistor contact width < %d (LIcon 1b + 2 * LI 5)"
+
+ width mvndc/li 170 "N-diffusion contact width < %d (LIcon 1)"
+ width mvnsc/li 170 "N-tap contact width     < %d (LIcon 1)"
+ width mvpdc/li 170 "P-diffusion contact width < %d (LIcon 1)"
+ width mvpsc/li 170 "P-tap contact width     < %d (LIcon 1)"
+ width mvndic/li 170 "N-diode contact width < %d (LIcon 1)"
+ width mvpdic/li 170 "P-diode contact width < %d (LIcon 1)"
+
+ spacing allpdiffcont allndiffcont 170 touching_illegal \
+	"Diffusion contact spacing < %d (LIcon 2)"
+ spacing allndiffcont allndiffcont 170 touching_ok \
+	"Diffusion contact spacing < %d (LIcon 2)"
+ spacing allpdiffcont allpdiffcont 170 touching_ok \
+	"Diffusion contact spacing < %d (LIcon 2)"
+ spacing pc pc 170 touching_ok "Poly1 contact spacing < %d (LIcon 2)"
+
+ spacing pc alldiff 190 touching_illegal \
+	"Poly contact spacing to diffusion < %d (LIcon 14)"
+ spacing pc allpfets 235 touching_illegal \
+	"Poly contact spacing to pFET < %d (LIcon 9 + PSDM 5a)"
+
+ spacing ndc,pdc nfet,pfet 55 touching_illegal \
+	"Diffusion contact to gate < %d (LIcon 11)"
+ spacing ndc,pdc scnfet,scpfet 50 touching_illegal \
+	"Diffusion contact to standard cell gate < %d (LIcon 11)"
+ spacing mvndc,mvpdc mvnfet,mvnnfet,mvpfet 55 touching_illegal \
+	"Diffusion contact to gate < %d (LIcon 11)"
+ spacing ndc,mvndc rnd,mvrnd 60 touching_illegal "Diffusion contact to rndiff < %d ()"
+ spacing pdc,mvpdc rdp,mvrdp 60 touching_illegal "Diffusion contact to rndiff < %d ()"
+ spacing nsc varactor,varhvt 250 touching_illegal \
+	"Diffusion contact to varactor gate < %d (LIcon 10)"
+ spacing mvnsc mvvar 250 touching_illegal \
+	"Diffusion contact to varactor gate < %d (LIcon 10)"
+
+ surround ndc/a *ndiff,nfet,scnfet,nfetlvt 40 absence_illegal \
+	"N-diffusion overlap of N-diffusion contact < %d (LIcon 5a)"
+ surround pdc/a *pdiff,pfet,scpfet,pfethvt,pfetlvt 40 absence_illegal \
+	"P-diffusion overlap of P-diffusion contact < %d (LIcon 5a)"
+ surround ndic/a *ndi 40 absence_illegal \
+	"N-diode overlap of N-diode contact < %d (LIcon 5a)"
+ surround pdic/a *pdi 40 absence_illegal \
+	"P-diode overlap of N-diode contact < %d (LIcon 5a)"
+
+ surround ndc/a *ndiff,nfet,scnfet,nfetlvt 60 directional \
+	"N-diffusion overlap of N-diffusion contact < %d in one direction (LIcon 5c)"
+ surround pdc/a *pdiff,pfet,scpfet,pfethvt,pfetlvt 60 directional \
+	"P-diffusion overlap of P-diffusion contact < %d in one direction (LIcon 5c)"
+ surround ndic/a *ndi 60 directional \
+	"N-diode overlap of N-diode contact < %d in one direction (LIcon 5c)"
+ surround pdic/a *pdi 60 directional \
+	"P-diode overlap of N-diode contact < %d in one direction (LIcon 5c)"
+
+ surround nsc/a *nsd 120 directional \
+	"N-tap overlap of N-tap contact < %d in one direction (LIcon 7)"
+ surround psc/a *psd 120 directional \
+	"P-tap overlap of P-tap contact < %d in one direction (LIcon 7)"
+
+ surround mvndc/a *mvndiff,mvnfet 40 absence_illegal \
+	"N-diffusion overlap of N-diffusion contact < %d (LIcon 5a)"
+ surround mvpdc/a *mvpdiff,mvpfet 40 absence_illegal \
+	"P-diffusion overlap of P-diffusion contact < %d (LIcon 5a)"
+ surround mvndic/a *mvndi 40 absence_illegal \
+	"N-diode overlap of N-diode contact < %d (LIcon 5a)"
+ surround mvpdic/a *mvpdi 40 absence_illegal \
+	"P-diode overlap of N-diode contact < %d (LIcon 5a)"
+
+ surround mvndc/a *mvndiff,mvnfet 60 directional \
+	"N-diffusion overlap of N-diffusion contact < %d in one direction (LIcon 5c)"
+ surround mvpdc/a *mvpdiff,mvpfet 60 directional \
+	"P-diffusion overlap of P-diffusion contact < %d in one direction (LIcon 5c)"
+ surround mvndic/a *mvndi 60 directional \
+	"N-diode overlap of N-diode contact < %d in one direction (LIcon 5c)"
+ surround mvpdic/a *mvpdi 60 directional \
+	"P-diode overlap of N-diode contact < %d in one direction (LIcon 5c)"
+
+ surround mvnsc/a *mvnsd 120 directional \
+	"N-tap overlap of N-tap contact < %d in one direction (LIcon 7)"
+ surround mvpsc/a *mvpsd 120 directional \
+	"P-tap overlap of P-tap contact < %d in one direction (LIcon 7)"
+
+ surround pc/a *poly,mrp1,xhrpoly,uhrpoly 50 absence_illegal \
+	"Poly overlap of poly contact < %d (LIcon 8)"
+ surround pc/a *poly,mrp1,xhrpoly,uhrpoly 80 directional \
+	"Poly overlap of poly contact < %d in one direction (LIcon 8a)"
+
+ exact_overlap ndc/a,pdc/a,psc/a,nsc/a,pc/a,ndic/a,pdic/a
+ exact_overlap mvndc/a,mvpdc/a,mvpsc/a,mvnsc/a,mvndic/a,mvpdic/a
+
+#-------------------------------------------------------------
+# LI - Local interconnect layer
+#-------------------------------------------------------------
+
+ width *li,rli 170 "Local interconnect width < %d (LI 1)"
+ width coreli 140 "Core local interconnect width < %d (LI c1)"
+ spacing allli allli,*obsli 170 touching_ok  "Local interconnect spacing < %d (LI 3)"
+ spacing coreli allli,*obsli 140 touching_ok  "Core local interconnect spacing < %d (LI c2)"
+
+ surround pc/li *li 80 directional \
+	"Local interconnect overlap of poly contact < %d in one direction (LI 5)"
+
+ surround ndc/li,nsc/li,pdc/li,psc/li,ndic/li,pdic/li,mvndc/li,mvnsc/li,mvpdc/li,mvpsc/li,mvndic/li,mvpdic/li \
+	*li,rli 80 directional \
+	"Local interconnect overlap of diffusion contact < %d in one direction (LI 5)"
+
+ area allli,*obsli 56100 170 "Local interconnect minimum area < %a (LI 6)"
+
+#-------------------------------------------------------------
+# MCON - Contact between local interconnect and metal1
+#-------------------------------------------------------------
+
+ width lic/m1 170 "Mcon width < %d (Mcon 1)"
+ spacing lic/m1 lic/m1,obslic/m1 170 touching_ok "Mcon spacing < %d (Mcon 2)"
+
+ exact_overlap lic/m1
+
+#-------------------------------------------------------------
+# METAL1 -
+#-------------------------------------------------------------
+
+ width *m1,rm1 140 "Metal1 width < %d (Met1 1)"
+ spacing allm1 allm1,*obsm1 140 touching_ok "Metal1 spacing < %d (Met1 2)"
+ area allm1,*obsm1 83000 140 "Metal1 minimum area < %a (Met1 6)"
+
+ surround lic/m1 *met1 30 absence_illegal \
+	"Metal1 overlap of local interconnect contact < %d (Met1 4)"
+ surround lic/m1 *met1 60 directional \
+	"Metal1 overlap of local interconnect contact < %d in one direction (Met1 5)"
+
+variants (fast),(full)
+ widespacing allm1 3000 allm1,*obsm1 280 touching_ok \
+	"Metal1 > 3um spacing to unrelated m1 < %d (Met1 3a)"
+ widespacing *obsm1 3000 allm1 280 touching_ok \
+	"Metal1 > 3um spacing to unrelated m1 < %d (Met1 3a)"
+
+variants (full)
+ cifmaxwidth m1_hole_empty 0 bend_illegal \
+	"Min area of metal1 holes > 0.14um^2 (Met1 7)"
+variants *
+
+#--------------------------------------------------
+# VIA1
+#--------------------------------------------------
+
+ width v1/m1 260 "Via1 width < %d (Via 1a + 2 * Via 4a)"
+ spacing v1 v1 60 touching_ok "Via1 spacing < %d (Via 2 - 2 * Via 4a)"
+ surround v1/m1 *m1 30 directional \
+	"Metal1 overlap of Via1 < %d in one direction (Via 5a - Via 4a)"
+ surround v1/m2 *m2 30 directional \
+	"Metal2 overlap of Via1 < %d in one direction (Met2 5 - Met2 4)"
+
+ exact_overlap v1/m2
+
+#--------------------------------------------------
+# METAL2 - 
+#--------------------------------------------------
+
+ width allm2 140 "Metal2 width < %d (Met2 1)"
+ spacing allm2  allm2,obsm2 140 touching_ok       "Metal2 spacing < %d (Met2 2)"
+ area allm2,obsm2 67600 140 "Metal2 minimum area < %a (Met2 6)"
+
+variants (fast),(full)
+ widespacing allm2 3000 allm2,obsm2  280 touching_ok \
+	"Metal2 > 3um spacing to unrelated m2 < %d (Met2 3)"
+ widespacing obsm2 3000 allm2  280 touching_ok \
+	"Metal2 > 3um spacing to unrelated m2 < %d (Met2 3)"
+
+variants (full)
+ cifmaxwidth m2_hole_empty 0 bend_illegal \
+	"Min area of metal2 holes > 0.14um^2 (Met2 7)"
+variants *
+
+#--------------------------------------------------
+# VIA2
+#--------------------------------------------------
+
+ width v2/m2 280 "Via2 width < %d (Via2 1a + 2 * Via2 4)"
+
+ spacing v2 v2 120 touching_ok "Via2 spacing < 0.24um (Via2 2 - 2 * Via2 4)"
+
+ surround v2/m2 *m2 45 directional \
+	"Metal2 overlap of Via2 < %d in one direction (Via2 4a - Via2 4)"
+ surround v2/m3 *m3 25 absence_illegal "Metal3 overlap of Via2 < %d (Met3 4)"
+
+ exact_overlap v2/m2
+
+#--------------------------------------------------
+# METAL3 - 
+#--------------------------------------------------
+
+ width allm3 300 "Metal3 width < %d (Met3 1)"
+ spacing allm3 allm3,obsm3  300 touching_ok "Metal3 spacing < %d (Met3 2)"
+ area allm3,obsm3 240000 300 "Metal3 minimum area < %a (Met3 6)"
+
+variants (fast),(full)
+ widespacing allm3 3000 allm3,obsm3  400 touching_ok \
+	"Metal3 > 3um spacing to unrelated m3 < %d (Met3 3d)"
+ widespacing obsm3 3000 allm3  400 touching_ok \
+	"Metal3 > 3um spacing to unrelated m3 < %d (Met3 3d)"
+variants *
+
+
+#ifdef METAL5
+#--------------------------------------------------
+# VIA3 - Requires METAL5 Module
+#--------------------------------------------------
+
+ width v3/m3 320 "Via3 width < %d (Via3 1 + 2 * Via3 4)"
+ spacing v3 v3 80 touching_ok "Via3 spacing < %d (Via3 2 - 2 * Via3 4)"
+ surround v3/m3 *m3 30 directional \
+	"Metal3 overlap of Via3 in one direction < %d (Via3 5 - Via3 4)"
+ surround v3/m4 *m4 5 directional \
+	"Metal4 overlap of Via3 in one direction < %d (Met4 3 - Via3 4)"
+
+ exact_overlap v3/m3
+
+#-----------------------------
+# METAL4 - METAL4 Module
+#-----------------------------
+
+variants *
+
+ width allm4 300 "Metal4 width < %d (Met4 1)"
+ spacing allm4  allm4,obsm4 300 touching_ok      "Metal4 spacing < %d (Met4 2)"
+ area allm4,obsm4 240000 300 "Metal4 minimum area < %a (Met4 4a)"
+
+variants (fast),(full)
+ widespacing allm4 3000 allm4,obsm4  400 touching_ok \
+	"Metal4 > 3um spacing to unrelated m4 < %d (S2M4)"
+ widespacing obsm4 3000 allm4  400 touching_ok \
+	"Metal4 > 3um spacing to unrelated m4 < %d (S2M4)"
+variants *
+
+#--------------------------------------------------
+# VIA4 - Requires METAL5 Module
+#--------------------------------------------------
+
+ width v4/m4 1180 "Via4 width < %d (Via4 1 + 2 * Via4 4)"
+ spacing v4 v4 420 touching_ok "Via4 spacing < %d (Via4 2 - 2 * Via4 4)"
+ surround v4/m5 *m5 120 absence_illegal \
+	"Metal5 overlap of Via4 < %d (Met5 3 - Via4 4)"
+
+ exact_overlap v4/m4
+
+#-----------------------------
+# METAL5 - METAL5 Module
+#-----------------------------
+
+ width allm5 1600 "Metal5 width < %d (Met5 1)"
+ spacing allm5  allm5,obsm5 1600 touching_ok "Metal5 spacing < %d (Met5 2)"
+ area allm5,obsm5 4000000 1600 "Metal5 minimum area < %a (Met5 4)"
+
+#endif (METAL5)
+
+#ifdef REDISTRIBUTION
+
+variants (full)
+
+ width metrdl 10000 "RDL width < %d (Rdl 1)"
+ spacing metrdl metrdl 10000 touching_ok "RDL spacing < %d (Rdl 2)"
+ surround glass metrdl 10750 absence_ok "RDL must surround glass cut by %d (Rdl 3)"
+ spacing metrdl padl 19660 surround_ok "RDL spacing to unrelated pad < %d (Rdl 6)"
+
+variants *
+
+#endif (REDISTRIBUTION)
+
+#--------------------------------------------------
+# NMOS, PMOS
+#--------------------------------------------------
+
+ extend allfets *poly 420 "Transistor width < %d (Diff/tap 2)"
+ # Except:  Note that standard cells allow transistor width minimum 0.36um
+ width pfetlvt 350 "LVT PMOS gate length < %d (Poly 1b)"
+
+ spacing *nsd,*mvnsd allpolynonfet 55 touching_illegal \
+	"N-tap spacing to field poly < %d (Poly 5)"
+ spacing *psd,*mvpsd allpolynonfet 55 touching_illegal \
+	"P-tap spacing to field poly < %d (Poly 5)"
+
+ # Full edge rule required to describe FET to butted tap distance
+ edge4way *psd *ndiff 300 *ndiff *psd 300 \
+	"Butting P-tap spacing to NMOS gate < %d (Poly 6)"
+ edge4way *nsd *pdiff 300 *pdiff *nsd 300 \
+	"Butting N-tap spacing to PMOS gate < %d (Poly 6)"
+ edge4way *mvpsd *mvndiff 300 *mvndiff *mvpsd 300 \
+	"Butting MV P-tap spacing to MV NMOS gate < %d (Poly 6)"
+ edge4way *mvnsd *mvpdiff 300 *mvpdiff *mvnsd 300 \
+	"Butting MV N-tap spacing to MV PMOS gate < %d (Poly 6)"
+
+ # No LV FETs in HV diff
+ spacing pfet,scpfet,pfetlvt,pfethvt,*pdiff *mvpdiff 360 touching_illegal \
+	"LV P-diffusion to MV P-diffusion < %d (Diff/tap 23 + Diff/tap 22)"
+
+ spacing nfet,scnfet,nfetlvt,varactor,varhvt,*ndiff *mvndiff 360 touching_illegal \
+	"LV N-diffusion to MV N-diffusion < %d (Diff/tap 23 + Diff/tap 22)"
+
+ # No HV FETs in LV diff
+ spacing mvpfet,*mvpdiff *pdiff 360 touching_illegal \
+	"MV P-diffusion to LV P-diffusion < %d (Diff/tap 23 + Diff/tap 22)"
+
+ spacing mvnfet,mvvaractor,*mvndiff *ndiff 360 touching_illegal \
+	"MV N-diffusion to LV N-diffusion < %d (Diff/tap 23 + Diff/tap 22)"
+
+ # Minimum length of MV FETs.  Note that this is larger than the minimum
+ # width (0.29um), so an edge rule is required
+
+ edge4way mvndiff mvnfet 500 mvnfet 0 0 \
+	"MV NMOS minimum length < %d (Poly 13)"
+
+ edge4way mvnsd mvvaractor 500 mvvaractor 0 0 \
+	"MV Varactor minimum length < %d (Poly 13)"
+
+ edge4way mvpdiff mvpfet 500 mvpfet 0 0 \
+	"MV PMOS minimum length < %d (Poly 13)"
+
+#--------------------------------------------------
+# mrp1 (N+ poly resistor)
+#--------------------------------------------------
+
+  width mrp1 330 "mrp1 resistor width < %d (Poly 3)"
+
+#--------------------------------------------------
+# xhrpoly (P+ poly resistor)
+#--------------------------------------------------
+
+  width xhrpoly 350 "xhrpoly resistor width < %d (P+ Poly 1a)"
+  # NOTE: xhrpoly resistor requires choice of discrete widths 0.35, 0.69, ... up to 1.27.
+
+#--------------------------------------------------
+# uhrpoly (P+ poly resistor, 2kOhm/sq)
+#--------------------------------------------------
+
+  width uhrpoly 350 "uhrpoly resistor width < %d"
+  spacing xhrpoly,uhrpoly,xpc alldiff 480 touching_illegal \
+	"xhrpoly/uhrpoly resistor spacing to diffusion < %d (Poly 9)"
+
+#------------------------------------
+# MOS Varactor device rules
+#------------------------------------
+
+ overhang *nsd var,varhvt 250 \
+ "N-Tap overhang of Varactor < %d (Var 4)"
+
+ overhang *mvnsd mvvar 250 \
+ "N-Tap overhang of Varactor < %d (Var 4)"
+
+ width var,varhvt,mvvar 180 "Varactor length < %d (Var 1)"
+ extend var,varhvt,mvvar *poly 1000 "Varactor width < %d (Var 2)"
+
+#ifdef MIM
+#-----------------------------------------------------------
+# MiM CAP (CAPM) - 
+#-----------------------------------------------------------
+
+ width *mimcap 2000 "MiM cap width < %d (Capm 1)"
+ spacing *mimcap *mimcap 840 touching_ok "MiM cap spacing < %d (Capm 2a)"
+ spacing *mimcap via2/m3 1270 touching_illegal \
+	"MiM cap spacing to via2 < %d (Capm 5)"
+ surround *mimcc *mimcap 200 absence_illegal \
+	"MiM cap must surround MiM cap contact by %d (Capm 4)"
+ rect_only *mimcap "MiM cap must be rectangular (Capm 7)
+
+ surround *mimcap *metal3/m3 140 absence_illegal \
+	"Metal3 must surround MiM cap by %d (Capm 3)"
+ spacing via2 *mimcap 50 touching_illegal "MiM cap cannot overlap via2 (Capm 8)"
+ spacing via3 *mimcap 50 touching_illegal "MiM cap cannot overlap via3 (Capm 8)"
+ # (resolve scaling issue!)
+ # cifspacing mim_bottom mim_bottom 1200 touching_ok \
+ #	"MiM cap bottom plate spacing < %d (Capm 2b)"
+
+ # MiM cap contact rules (VIA3)
+
+ width mimcc/m3 320 "MiM cap contact width < %d (Via3 1 + 2 * Via3 4)"
+ spacing mimcc mimcc 80 touching_ok "MiM cap contact spacing < %d (Via3 2 - 2 * Via3 4)"
+ surround mimcc/m4 *m4 5 directional \
+	"Metal4 overlap of MiM cap contact in one direction < %d (Met4 3 - Via3 4)"
+ exact_overlap mimcc/m3
+
+ width *mimcap2 2000 "MiM cap width < %d (Cap2m 1)"
+ spacing *mimcap2 *mimcap2 840 touching_ok "MiM cap spacing < %d (Cap2m 2a)"
+ spacing *mimcap2 via3/m4 1270 touching_illegal \
+	"MiM cap spacing to via3 < %d (Cap2m 5)"
+ surround *mim2cc *mimcap2 200 absence_illegal \
+	"MiM cap must surround MiM cap contact by %d (Cap2m 4)"
+ rect_only *mimcap2 "MiM cap must be rectangular (Cap2m 7)
+
+ surround *mimcap2 *metal4/m4 140 absence_illegal \
+	"Metal4 must surround MiM cap by %d (Cap2m 3)"
+ spacing via3 *mimcap2 50 touching_illegal "MiM cap cannot overlap via3 (Cap2m 8)"
+ spacing via4 *mimcap2 50 touching_illegal "MiM cap cannot overlap via4 (Cap2m 8)"
+ # (resolve scaling issue!)
+ # cifspacing mim2_bottom mim2_bottom 1200 touching_ok \
+ #	"MiM2 cap bottom plate spacing < %d (Cap2m 2b)"
+
+ # MiM cap contact rules (VIA4)
+
+ width mim2cc/m4 1180 "MiM2 cap contact width < %d (Via4 1 + 2 * Via4 4)"
+ spacing mim2cc mim2cc 420 touching_ok \
+	"MiM2 cap contact spacing < %d (Via4 2 - 2 * Via4 4)"
+ surround mim2cc/m5 *m5 120 absence_illegal \
+	"Metal5 overlap of MiM2 cap contact < %d (Met5 3 - Via4 4)"
+ exact_overlap mim2cc/m4
+
+#endif (MIM)
+
+#----------------------------
+# End DRC style
+#----------------------------
+
+end
+
+#----------------------------
+# LEF format definitions
+#----------------------------
+
+lef
+
+ routing li	li1 LI1 LI li
+
+ routing m1	met1 MET1 m1
+ routing m2	met2 MET2 m2
+ routing m3	met3 MET3 m3
+#ifdef METAL5
+ routing m4	met4 MET4 m4
+ routing m5	met5 MET5 m5
+#endif (METAL5)
+#ifdef REDISTRIBUTION
+ routing mrdl	met6 MET6 m6 MRDL METRDL
+#endif
+
+ cut lic  mcon MCON Mcon
+ cut m2c  via via1 VIA VIA1 cont2 via12
+ cut m3c  via2 VIA2 cont3 via23
+#ifdef METAL5
+ cut via3 via3 VIA3 cont4 via34
+ cut via4 via4 VIA4 cont5 via45
+#endif (METAL5)
+
+ obs obsli   li1
+ obs obsm1   met1
+ obs obsm2   met2
+ obs obsm3   met3
+
+#ifdef METAL5
+ obs obsm4   met4
+ obs obsm5   met5
+#endif (METAL5)
+#ifdef REDISTRIBUTION
+ obs obsmrdl met6
+#endif
+
+ obs obslic mcon
+
+end
+
+#-----------------------------------------------------
+# Device and Parasitic extraction
+#-----------------------------------------------------
+
+
+extract
+ style ngspice variants (lvs),(sim),(si)
+ cscale 1
+ # NOTE: SkyWater SPICE libraries use .option scale 1E6 so all
+ # dimensions must be in units of microns in the extract file.
+ # Use extract style "ngspice(si)" to override this and produce
+ # a file with SI units for length/area.
+
+ variants (lvs),(sim)
+ lambda  1E6
+ variants (si)
+ lambda 1.0
+ variants *
+
+ units	microns
+ step   7
+ sidehalo 2
+
+ # NOTE:  MiM cap layers have been purposely put out of order,
+ # may want to reconsider.
+
+ planeorder dwell 	0
+ planeorder well 	1
+ planeorder active 	2
+ planeorder locali 	3
+ planeorder metal1 	4
+ planeorder metal2 	5
+ planeorder metal3 	6
+#ifdef METAL5
+ planeorder metal4 	7
+ planeorder metal5 	8
+#ifdef REDISTRIBUTION
+ planeorder metali	9
+ planeorder block      10
+ planeorder comment    11
+ planeorder cap1       12
+ planeorder cap2       13
+#else (!REDISTRIBUTION)
+ planeorder block       9	
+ planeorder comment    10
+ planeorder cap1       11
+ planeorder cap2       12
+#endif (!REDISTRIBUTION)
+#else (!METAL5)
+#ifdef REDISTRIBUTION
+ planeorder metali     7
+ planeorder block      8
+ planeorder comment    9
+ planeorder cap1       10
+ planeorder cap2       11
+#else (!REDISTRIBUTION)
+ planeorder block      7
+ planeorder comment    8
+ planeorder cap1       9
+ planeorder cap2       10
+#endif (!REDISTRIBUTION)
+#endif (!METAL5)
+
+ height	dnwell 	    -0.1    0.1
+ height	nwell,pwell  0.0    0.2062
+ height alldiff	     0.2062 0.12
+ height allpoly	     0.3262 0.18
+ height alldiffcont  0.3262 0.61
+ height pc	     0.5062 0.43
+ height allli	     0.9361 0.10
+ height lic	     1.0361 0.34
+ height allm1	     1.3761 0.36
+ height v1	     1.7361 0.27
+ height allm2	     2.0061 0.36
+ height v2	     2.3661 0.42
+ height allm3	     2.7861 0.845
+#ifdef METAL5
+ height v3	     3.6311 0.39
+ height allm4	     4.0211 0.845
+ height v4	     4.8661 0.505
+ height allm5	     5.3711 1.26
+ height mimcap	     2.4661 0.2
+ height mimcap2	     3.7311 0.2
+ height mimcc	     2.6661 0.12
+ height mim2cc	     3.9311 0.09
+#ifdef REDISTRIBUTION
+ height mrdlc	     6.6311 5.2523
+ height mrdl	    11.8834 4.0
+#endif (!REDISTRIBUTION)
+#endif (!METAL5)
+
+ # Antenna check parameters
+ # Note that checks w/diode diffusion are not modeled
+ model partial
+ antenna poly sidewall 50 none
+ antenna allcont surface 3 none
+ antenna li sidewall 75 0 450
+ antenna lic surface 3 0 18
+ antenna m1,m2,m3 sidewall 400 2600 400
+ antenna v1 surface 3 0 18
+ antenna v2 surface 6 0 36
+#ifdef METAL5
+ antenna m4,m5 sidewall 400 2600 400
+ antenna v3,v4 surface 6 0 36
+#endif (METAL5)
+
+ tiedown alldiffnonfet
+
+ substrate *ppdiff,*mvppdiff,space/w,pwell well $SUB -dnwell
+
+# Layer resistance: Use document xp018-PDS-v4_2_1.pdf
+
+# Resistances are in milliohms per square
+# Optional 3rd argument is the corner adjustment fraction
+# Device values come from trtc.cor (typical corner)
+ resist (dnwell)/dwell          2200000
+ resist (pwell)/well            3050000
+ resist (nwell)/well            1700000
+ resist (rpw)/well              3050000 0.5
+ resist (*ndiff,nsd)/active 	 120000
+ resist (*pdiff,*psd)/active	 197000
+ resist (*mvndiff,mvnsd)/active  114000
+ resist (*mvpdiff,*mvpsd)/active 191000
+
+ resist ndiffres/active 	120000 0.5
+ resist pdiffres/active 	197000 0.5
+ resist mvndiffres/active 	114000 0.5
+ resist mvpdiffres/active 	191000 0.5
+ resist mrp1/active		 48200 0.5
+ resist xhrpoly/active	        319800 0.5
+ resist uhrpoly/active	       2000000 0.5
+
+ resist (allpolynonres)/active   48200
+ resist rmp/active   		 48200
+
+ resist (allli)/locali		 12200
+ resist (allm1)/metal1		   125
+ resist (allm2)/metal2		   125
+ resist (allm3)/metal3	            47
+#ifdef METAL5
+ resist (allm4)/metal4  	    47
+ resist (allm5)/metal5  	    29
+#endif (METAL5)
+#ifdef REDISTRIBUTION
+ resist mrdl/metali		     5
+#endif (REDISTRIBUTION)
+
+ contact ndc,nsc		 15000
+ contact pdc,psc		 15000
+ contact mvndc,mvnsc		 15000
+ contact mvpdc,mvpsc	  	 15000
+ contact pc			 15000
+ contact lic			152000
+ contact m2c			  4500
+ contact m3c			  3410
+#ifdef METAL5
+#ifdef MIM
+ contact mimcc			  4500
+ contact mim2cc			  3410
+#endif (MIM)
+ contact via3			  3410
+ contact via4			   380
+#endif (METAL5)
+#ifdef REDISTRIBUTION
+ contact mrdlc			     6
+#endif (REDISTRIBUTION)
+
+#-------------------------------------------------------------------------
+# Parasitic capacitance values:  Use document (...)
+#-------------------------------------------------------------------------
+# This uses the new "default" definitions that determine the intervening
+# planes from the planeorder stack, take care of the reflexive sideoverlap
+# definitions, and generally clean up the section and make it more readable.
+#
+# Also uses "units microns" statement, so all parasitic capacitance values
+# are taken directly from the source document PDS_035_03, in units of
+# aF/um^2 for area caps and aF/um for perimeter and sidewall caps.
+#-------------------------------------------------------------------------
+# Remember that device capacitances to substrate are taken care of by the
+# models.  Thus, active and poly definitions ignore all "fet" types.
+# fet types are excluded when computing parasitic capacitance to
+# active from layers above them because poly is a shield; fet types are
+# included for parasitics from layers above to poly.  Resistor types
+# should be removed from all parasitic capacitance calculations, or else
+# they just create floating caps.  Technically, the capacitance probably
+# should be split between the two terminals.  Unsure of the correct model.
+#-------------------------------------------------------------------------
+
+#n-well
+# NOTE:  This value not found in PEX files
+defaultareacap     nwell well 120
+
+#n-active 
+# Rely on device models to capture *ndiff area cap
+# Do not extract parasitics from resistors
+# defaultareacap     allnactivenonfet active 790
+# defaultperimeter   allnactivenonfet active 280
+
+#p-active
+# Rely on device models to capture *pdiff area cap
+# Do not extract parasitics from resistors
+# defaultareacap     allpactivenonfet active 810
+# defaultperimeter   allpactivenonfet active 300
+
+#poly
+# Do not extract parasitics from resistors
+# defaultsidewall    allpolynonfet active  22
+# defaultareacap     allpolynonfet active  105
+# defaultperimeter   allpolynonfet active   57
+
+ defaultsidewall    *poly active  63
+ defaultareacap     *poly active nwell,obswell,pwell well  63
+ defaultperimeter   *poly active nwell,obswell,pwell well  16
+
+#locali
+ defaultsidewall    allm1 metal1       113
+ defaultareacap     allm1 metal1 nwell,obswell,pwell well  37
+ defaultperimeter   allm1 metal1 nwell,obswell,pwell well  8
+ defaultoverlap     allm1 metal1 nwell well 37
+
+#locali->diff
+ defaultoverlap     allm1 metal1 allactivenonfet active 36
+ defaultsideoverlap allm1 metal1 allactivenonfet active 9
+
+#locali->poly
+ defaultoverlap     allm1 metal1 allpolynonres active 46
+ defaultsideoverlap allm1 metal1 allpolynonres active 10
+
+#metal1
+ defaultsidewall    allm1 metal1       113
+ defaultareacap     allm1 metal1 nwell,obswell,pwell well  17
+ defaultperimeter   allm1 metal1 nwell,obswell,pwell well  8
+ defaultoverlap     allm1 metal1 nwell well 26
+
+#metal1->locali
+ defaultoverlap     allm1 metal1 allactivenonfet active 36
+ defaultsideoverlap allm1 metal1 allactivenonfet active 9
+
+#metal1->diff
+ defaultoverlap     allm1 metal1 allactivenonfet active 36
+ defaultsideoverlap allm1 metal1 allactivenonfet active 9
+
+#metal1->poly
+ defaultoverlap     allm1 metal1 allpolynonres active 46
+ defaultsideoverlap allm1 metal1 allpolynonres active 10
+
+#metal2
+ defaultsidewall    allm2 metal2      101
+ defaultareacap     allm2 metal2 nwell,obswell,pwell well 12
+ defaultperimeter   allm2 metal2 nwell,obswell,pwell well 6
+ defaultoverlap     allm2 metal2 nwell well 13
+
+#metal2->diff
+ defaultoverlap     allm2 metal2 allactivenonfet active 14
+ defaultsideoverlap allm2 metal2 allactivenonfet active 7
+
+#metal2->poly
+ defaultoverlap     allm2 metal2 allpolynonres active 16
+ defaultsideoverlap allm2 metal2 allpolynonres active 7
+
+#metal2->metal1
+ defaultoverlap     allm2 metal2 allm1 metal1 39
+ defaultsideoverlap allm2 metal2 allm1 metal1 10
+
+#metal3
+ defaultsidewall    allm3 metal3     102
+ defaultoverlap     allm3 metal3 nwell well 8
+ defaultareacap     allm3 metal3 nwell,obswell,pwell well 8
+ defaultperimeter   allm3 metal3 nwell,obswell,pwell well 5
+
+#metal3->diff
+ defaultoverlap     allm3 metal3 allactive active 9
+ defaultsideoverlap allm3 metal3 allactive active 6
+
+#metal3->poly
+ defaultoverlap     allm3 metal3 allpolynonres active 10
+ defaultsideoverlap allm3 metal3 allpolynonres active 6
+
+#metal3->metal1
+ defaultoverlap     allm3 metal3 allm1 metal1 15
+ defaultsideoverlap allm3 metal3 allm1 metal1 7
+
+#metal3->metal2
+ defaultoverlap     allm3 metal3 allm2 metal2 39
+ defaultsideoverlap allm3 metal3 allm2 metal2 10
+
+#ifdef METAL5
+#metal4
+ defaultsidewall    allm4 metal4       102
+# defaultareacap     alltopm metal4 well  6
+ areacap     	    allm4/m4 8
+ defaultoverlap     allm4 metal4 nwell well 8
+ defaultperimeter   allm4 metal4 well  5
+
+#metal4->diff
+ defaultoverlap     allm4 metal4 allactivenonfet active 7
+ defaultsideoverlap allm4 metal4 allactivenonfet active 7
+
+#metal4->poly
+ defaultoverlap     allm4 metal4 allpolynonres active 7
+ defaultsideoverlap allm4 metal4 allpolynonres active 5
+
+#metal4->metal1
+ defaultoverlap     allm4 metal4 allm1 metal1 9
+ defaultsideoverlap allm4 metal4 allm1 metal1 6
+
+#metal4->metal2
+ defaultoverlap     allm4 metal4 allm2 metal2 15
+ defaultsideoverlap allm4 metal4 allm2 metal2 7
+
+#metal4->metal3
+ defaultoverlap     allm4 metal4 allm3 metal3 39
+ defaultsideoverlap allm4 metal4 allm3 metal3 10
+
+#metal5
+ defaultsidewall    allm5 metal5       103
+# defaultareacap     allm5 metal5 well  6
+ areacap     	    allm5/m5 6
+ defaultoverlap     allm5 metal5 nwell well 6
+ defaultperimeter   allm5 metal5 well  5
+
+#metal5->diff
+ defaultoverlap     allm5 metal5 allactivenonfet active 5
+ defaultsideoverlap allm5 metal5 allactivenonfet active 5
+
+#metal5->poly
+ defaultoverlap     allm5 metal5 allpolynonres active 5
+ defaultsideoverlap allm5 metal5 allpolynonres active 5
+
+#metal5->metal1
+ defaultoverlap     allm5 metal5 allm1 metal1 7
+ defaultsideoverlap allm5 metal5 allm1 metal1 5
+
+#metal5->metal2
+ defaultoverlap     allm5 metal5 allm2 metal2 9
+ defaultsideoverlap allm5 metal5 allm2 metal2 6
+
+#metal5->metal3
+ defaultoverlap     allm5 metal5 allm3 metal3 15
+ defaultsideoverlap allm5 metal5 allm3 metal3 7
+
+#metal5->metal4
+ defaultoverlap     allm5 metal5 allm4 metal4 39
+ defaultsideoverlap allm5 metal5 allm4 metal4 10
+#endif (METAL5)
+
+# Devices:  Use document (...)
+
+variants (sim)
+
+ device msubcircuit pshort pfet,scpfet *pdiff,pdiffres *pdiff,pdiffres nwell error l=l w=w
+ device msubcircuit plowvt pfetlvt *pdiff,pdiffres *pdiff,pdiffres nwell error l=l w=w
+ device msubcircuit phighvt pfethvt *pdiff,pdiffres *pdiff,pdiffres nwell error l=l w=w
+
+ device msubcircuit nshort nfet,scnfet *ndiff,ndiffres *ndiff,ndiffres pwell,space/w error l=l w=w
+ device msubcircuit nlowvt nfetlvt *ndiff,ndiffres *ndiff,ndiffres pwell,space/w error l=l w=w
+ device msubcircuit sonos_e nsonos *ndiff,ndiffres *ndiff,ndiffres pwell,space/w error l=l w=w
+ device subcircuit xcnwvc varactor *nndiff nwell error l=l w=w
+ device subcircuit xcnwvc2 varhvt *nndiff nwell error l=l w=w
+ device subcircuit xchvnwc mvvaractor *mvnndiff nwell error l=l w=w
+
+ device msubcircuit phv mvpfet *mvpdiff,mvpdiffres *mvpdiff,mvpdiffres nwell error l=l w=w
+ device msubcircuit nhv mvnfet *mvndiff,mvndiffres *mvndiff,mvndiffres pwell,space/w error l=l w=w
+ device msubcircuit nhvnative mvnnfet *mvndiff,mvndiffres *mvndiff,mvndiffres pwell,space/w error l=l w=w
+
+ device rsubcircuit short rmp     *poly	 space/w,pwell,nwell error l=l w=w
+ device rsubcircuit short rli1    *li,coreli space/w,pwell,nwell error l=l w=w
+ device rsubcircuit short rmetal1 *metal1 space/w,pwell,nwell error l=l w=w
+ device rsubcircuit short rmetal2 *metal2 space/w,pwell,nwell error l=l w=w
+ device rsubcircuit short rmetal3 *metal3 space/w,pwell,nwell error l=l w=w
+#ifdef METAL5
+ device rsubcircuit short rm4 *m4 space/w,pwell,nwell error l=l w=w
+ device rsubcircuit short rm5 *m5 space/w,pwell,nwell error l=l w=w
+#endif (METAL5)
+
+ device rsubcircuit xhrpoly  xhrpoly xpc pwell,space/w error l=l w=w
+ device rsubcircuit uhrpoly  uhrpoly xpc pwell,space/w error l=l w=w
+ device rsubcircuit mrp1     mrp1    *poly pwell,space/w error 	l=l w=w
+
+ device rsubcircuit mrdn     ndiffres *ndiff pwell,space/w  error l=l w=w
+ device rsubcircuit mrdp     pdiffres *pdiff nwell    error l=l w=w
+ device rsubcircuit xpwres   rpw       pwell dnwell error l=l w=w
+
+ device rsubcircuit mrdn_hv  mvndiffres *mvndiff pwell,space/w error l=l w=w
+ device rsubcircuit mrdp_hv  mvpdiffres *mvpdiff nwell   error l=l w=w
+
+ device subcircuit  pdiode *pdiode nwell a=a p=p
+ device msubcircuit ndiode *ndiode pwell,space/w a=a p=p
+ device subcircuit  pdiode_h *mvpdiode nwell a=a p=p
+ device msubcircuit ndiode_h *mvndiode pwell,space/w a=a p=p
+
+ # These are parasitic devices
+ device msubcircuit ndiode_lvt *ndiodelvt pwell,space/w a=a p=p
+ device subcircuit  pdiode_lvt *pdiodelvt nwell a=a p=p
+ device subcircuit  pdiode_hvt *pdiodehvt nwell a=a p=p
+ device msubcircuit ndiode_native *nndiode pwell,space/w a=a p=p
+
+#ifdef MIM
+ device subcircuit xcmimc1 *mimcap  m3 nwell,pwell,space/w error a=a p=p s=subs
+ device subcircuit xcmimc2 *mimcap2 m4,mimcc/m4 nwell,pwell,space/w error a=a p=p s=subs
+#endif (MIM)
+
+ variants (lvs),(si)
+
+ device mosfet pshort scpfet,pfet pdiff,pdiffres,pdc nwell 
+ device mosfet plowvt pfetlvt pdiff,pdiffres,pdc nwell 
+ device mosfet phighvt pfethvt pdiff,pdiffres,pdc nwell 
+ device mosfet nshort scnfet,nfet ndiff,ndiffres,ndc pwell,space/w
+ device mosfet nlowvt nfetlvt ndiff,ndiffres,ndc pwell,space/w
+ device mosfet sonos_e nsonos ndiff,ndiffres,ndc pwell,space/w
+ device mosfet phv mvpfet mvpdiff,mvpdiffres,mvpdc nwell 
+ device mosfet nhv mvnfet mvndiff,mvndiffres,mvndc pwell,space/w
+ device mosfet nhvnative mvnnfet *mvndiff,mvndiffres pwell,space/w
+
+ # These devices always extract as subcircuits
+ device subcircuit xcnwvc varactor *nndiff nwell error l=l w=w
+ device subcircuit xcnwvc2 varhvt *nndiff nwell error l=l w=w
+ device subcircuit xchvnwc mvvaractor *mvnndiff nwell error l=l w=w
+
+ device resistor short rmp     *poly
+ device resistor short rli1    *li,coreli
+ device resistor short rmetal1 *metal1
+ device resistor short rmetal2 *metal2
+ device resistor short rmetal3 *metal3
+#ifdef METAL5
+ device resistor short rm4 *m4
+ device resistor short rm5 *m5
+#endif (METAL5)
+
+ device resistor xhrpoly xhrpoly xpc 
+ device resistor uhrpoly uhrpoly xpc 
+ device resistor mrp1 mrp1       *poly 
+ device resistor mrdn  ndiffres *ndiff 
+ device resistor mrdp  pdiffres *pdiff 
+ device resistor mrdn_hv   mvndiffres *mvndiff 
+ device resistor mrdp_hv   mvpdiffres *mvpdiff 
+ device resistor xpwres   rpw    pwell
+
+ device pdiode pdiode *pdiode nwell a=a p=p
+ device ndiode ndiode *ndiode pwell,space/w a=a p=p
+ device pdiode pdiode_h *mvpdiode nwell a=a p=p
+ device ndiode ndiode_h *mvndiode pwell,space/w a=a p=p
+
+ # These are parasitic devices
+ device ndiode ndiode_lvt *ndiodelvt pwell,space/w a=a p=p
+ device pdiode pdiode_lvt *pdiodelvt nwell a=a p=p
+ device pdiode pdiode_hvt *pdiodehvt nwell a=a p=p
+ device ndiode ndiode_native *nndiode pwell,space/w a=a p=p
+
+ device subcircuit  pdiode_h *mvpdiode nwell a=a p=p
+ device msubcircuit ndiode_h *mvndiode pwell,space/w a=a p=p
+
+
+#ifdef MIM
+ device capacitor xcmimc1 *mimcap  *m3 1
+ device capacitor xcmimc2 *mimcap2 *m4 1
+#endif (MIM)
+
+end
+
+#-----------------------------------------------------
+# Wiring tool definitions
+#-----------------------------------------------------
+
+wiring
+ # All wiring values are in nanometers
+ scalefactor 10
+
+ contact lic 170 li 0  0 m1 30 60
+ contact v1  260 m1 0 30 m2  0 30  
+ contact v2  280 m2 0 45 m3 25  0
+#ifdef METAL5
+ contact v3  320 m3 0 30 m4  0  5
+ contact v4 1180 m4 0    m5 120 
+#endif (METAL5)
+
+ contact pc  170  poly 50 80 li 0 80
+ contact pdc 170 pdiff 40 60 li 0 80
+ contact ndc 170 ndiff 40 60 li 0 80
+ contact psc 170   psd 40 60 li 0 80
+ contact nsc 170   nsd 40 60 li 0 80
+
+end
+
+#-----------------------------------------------------
+# Plain old router. . . 
+#-----------------------------------------------------
+
+router
+end
+
+#------------------------------------------------------------
+# Plowing (restored in magic 8.2, need to fill this section)
+#------------------------------------------------------------
+
+plowing
+end
+
+#-----------------------------------------------------------------
+# No special plot layers defined (use default PNM color choices)
+#-----------------------------------------------------------------
+
+plot
+  style pnm
+     default
+     draw fillblock no_color_at_all
+     draw nwell cwell
+end
+
diff --git a/sky130/sky130_fd_sc_hd_config.tcl b/sky130/sky130_fd_sc_hd_config.tcl
new file mode 100644
index 0000000..4d9393a
--- /dev/null
+++ b/sky130/sky130_fd_sc_hd_config.tcl
@@ -0,0 +1,41 @@
+set current_folder [file dirname [file normalize [info script]]]
+# Technology lib
+
+set ::env(LIB_SYNTH) "$::env(PDK_ROOT)/$::env(PDK)/libs.ref/lib/$::env(PDK_VARIANT)/sky130_fd_sc_hd_tt_1.80v_25C.lib"
+set ::env(LIB_MAX) "$::env(PDK_ROOT)/$::env(PDK)/libs.ref/lib/$::env(PDK_VARIANT)/sky130_fd_sc_hd_ff_1.95v_-40C.lib"
+set ::env(LIB_MIN) "$::env(PDK_ROOT)$::env(PDK)/libs.ref/lib/$::env(PDK_VARIANT)/sky130_fd_sc_hd_ss_1.60v_100C.lib"
+
+
+set ::env(LIB_TYPICAL) $::env(LIB_SYNTH)
+
+# welltap and endcap cells
+set ::env(FP_WELLTAP_CELL) "sky130_fd_sc_hd_tapvpwrvgnd_1"
+set ::env(FP_ENDCAP_CELL) "sky130_fd_sc_hd_decap_3"
+
+# defaults (can be overridden by designs):
+set ::env(SYNTH_DRIVING_CELL) "sky130_fd_sc_hd_inv_8"
+#capacitance : 0.017653;
+set ::env(SYNTH_DRIVING_CELL_PIN) "Y"
+# update these
+set ::env(SYNTH_CAP_LOAD) "17.65" ; # femtofarad _inv_8 pin A cap
+set ::env(SYNTH_MIN_BUF_PORT) "sky130_fd_sc_hd_buf_2 A X"
+set ::env(SYNTH_TIEHI_PORT) "sky130_fd_sc_hd_conb_1 HI"
+set ::env(SYNTH_TIELO_PORT) "sky130_fd_sc_hd_conb_1 LO"
+
+# cts defaults
+set ::env(CTS_ROOT_BUFFER) sky130_fd_sc_hd_clkbuf_16
+set ::env(CELL_CLK_PORT) CLK
+
+# Placement defaults
+set ::env(PL_LIB) $::env(LIB_TYPICAL)
+
+# Fillcell insertion
+set ::env(FILL_CELL) "sky130_fd_sc_hd_decap_ sky130_fd_sc_hd_fill_"
+
+set ::env(CELL_PAD) 2
+set ::env(CELL_PAD_EXECLUDE) "$::env(PDK_VARIANT)_tap* $::env(PDK_VARIANT)_decap* $::env(PDK_VARIANT)_fill*"
+
+set ::env(ROOT_CLK_BUFFER) $::env(PDK_VARIANT)_clkbuf_16
+set ::env(CLK_BUFFER) $::env(PDK_VARIANT)_clkbuf_4
+set ::env(CLK_BUFFER_INPUT) A
+set ::env(CLK_BUFFER_OUTPUT) X
diff --git a/sky130/sky130_make_torture.tcl b/sky130/sky130_make_torture.tcl
new file mode 100644
index 0000000..580dc0f
--- /dev/null
+++ b/sky130/sky130_make_torture.tcl
@@ -0,0 +1,313 @@
+#---------------------------------------
+# Torture test generator for EFS8
+# (Specifically for EFS8B)
+# (work in progress)
+#---------------------------------------
+
+namespace path {::tcl::mathop ::tcl::mathfunc}
+
+# Set random seed so that torture test is not random from run to run.
+srand 1234567
+
+# NxN array MOSFET devices
+
+proc mos_array {n devname startx starty {deltax 12700} {deltay 254}} {
+   suspendall
+   box position $startx $starty
+   set i 0
+   for {set x 0} {$x < $n} {incr x} {
+      for {set y 0} {$y < $n} {incr y} {
+
+         set r [int [* [rand] 20]]
+         set w [+ 0.22 [* 0.5 $r]]
+         set r [int [* [rand] 20]]
+         set l [+ 0.18 [* 0.3 $r]]
+         set m [int [+ 1 [* [rand] 8]]]
+         set nf [int [+ 1 [* [rand] 8]]]
+
+         set r [int [* [rand] 8]]
+         set dcov [+ 20 [* 10 $r]]
+         set r [int [* [rand] 8]]
+         set pcov [+ 20 [* 10 $r]]
+         set r [int [* [rand] 8]]
+         set rlcov [+ 20 [* 10 $r]]
+
+         if {[rand] > 0.5} {set pov 1} else {set pov 0}
+         if {[rand] > 0.5} {set dov 1} else {set dov 0}
+         if {[rand] > 0.5} {set tc 1} else {set tc 0}
+         if {[rand] > 0.5} {set bc 1} else {set bc 0}
+         if {[rand] > 0.5} {set fm 1} else {set fm 0}
+         if {[rand] > 0.5} {set gl 1} else {set gl 0}
+         if {[rand] > 0.5} {set gr 1} else {set gr 0}
+         if {[rand] > 0.5} {set gt 1} else {set gt 0}
+         if {[rand] > 0.5} {set gb 1} else {set gb 0}
+
+         magic::gencell sky130::${devname} ${devname}_$i \
+		w $w l $l m $m nf $nf diffcov $dcov polycov $pcov \
+		rlcov $rlcov poverlap $pov doverlap $dov topc $tc \
+		botc $bc full_metal $fm glc $gl grc $gr gbc $gb gtc $gt
+         select cell ${devname}_$i
+         set bh [box height]
+         set bh [+ $bh $deltay]
+         box move n $bh
+         incr i
+      }
+      set bp [box position]
+      set bpx [lindex $bp 0]
+      box position $bpx $starty
+      box move e $deltax
+   }
+   resumeall
+}
+
+# NxN array resistor devices
+
+proc res_array {n devname startx starty {deltax 12700} {deltay 254}} {
+   suspendall
+   box position $startx $starty
+   set i 0
+   for {set x 0} {$x < $n} {incr x} {
+      for {set y 0} {$y < $n} {incr y} {
+
+         set r [int [* [rand] 10]]
+         set w [+ 0.42 [* 0.5 $r]]
+         set r [int [* [rand] 50]]
+         set l [+ 2.10 [* 2.0 $r]]
+         set m [int [+ 1 [* [rand] 2]]]
+         set nx [int [+ 1 [* [rand] 10]]]
+
+         set r [int [* [rand] 8]]
+         set ecov [+ 20 [* 10 $r]]
+
+         if {[rand] > 0.5} {set rov 1} else {set rov 0}
+	 if {[rand] > 0.5} {set sn 1} else {set sn 0}
+         if {[rand] > 0.5} {set fm 1} else {set fm 0}
+         if {[rand] > 0.5} {set gl 1} else {set gl 0}
+         if {[rand] > 0.5} {set gr 1} else {set gr 0}
+         if {[rand] > 0.5} {set gt 1} else {set gt 0}
+         if {[rand] > 0.5} {set gb 1} else {set gb 0}
+
+	 # Snake geometry does not apply to xhrpoly, uhrpoly, and xpwres, and
+	 # roverlap and endcov are prohibited.
+	 if {$devname == "xhrpoly" || $devname == "uhrpoly" || $devname == "xpwres"} {
+	    magic::gencell sky130::${devname} ${devname}_$i \
+		w $w l $l m $m nx $nx full_metal $fm \
+		glc $gl grc $gr gbc $gb gtc $gt
+	 } else {
+	    magic::gencell sky130::${devname} ${devname}_$i \
+		w $w l $l m $m nx $nx endcov $ecov roverlap $rov \
+		snake $sn full_metal $fm glc $gl grc $gr gbc $gb gtc $gt
+	 }
+         select cell ${devname}_$i
+         set bh [box height]
+         set bh [+ $bh $deltay]
+         box move n $bh
+         incr i
+      }
+      set bp [box position]
+      set bpx [lindex $bp 0]
+      box position $bpx $starty
+      box move e $deltax
+   }
+   resumeall
+}
+
+# NxN array diode devices
+
+proc diode_array {n devname startx starty} {
+   suspendall
+   box position $startx $starty
+   set i 0
+   for {set x 0} {$x < $n} {incr x} {
+      for {set y 0} {$y < $n} {incr y} {
+
+         set r [int [* [rand] 10]]
+         set w [+ 0.42 [* 0.5 $r]]
+         set r [int [* [rand] 10]]
+         set l [+ 0.42 [* 0.5 $r]]
+         set nx [int [+ 1 [* [rand] 4]]]
+         set ny [int [+ 1 [* [rand] 4]]]
+
+         if {[rand] > 0.5} {set dov 1} else {set dov 0}
+         if {[rand] > 0.5} {set el 1} else {set el 0}
+         if {[rand] > 0.5} {set er 1} else {set er 0}
+         if {[rand] > 0.5} {set et 1} else {set et 0}
+         if {[rand] > 0.5} {set eb 1} else {set eb 0}
+         if {[rand] > 0.5} {set fm 1} else {set fm 0}
+         if {[rand] > 0.5} {set gl 1} else {set gl 0}
+         if {[rand] > 0.5} {set gr 1} else {set gr 0}
+         if {[rand] > 0.5} {set gt 1} else {set gt 0}
+         if {[rand] > 0.5} {set gb 1} else {set gb 0}
+
+         magic::gencell sky130::${devname} ${devname}_$i \
+		w $w l $l nx $nx ny $ny doverlap $dov \
+		full_metal $fm elc $el erc $er etc $et \
+		ebc $eb glc $gl grc $gr gbc $gb gtc $gt
+         select cell ${devname}_$i
+         set bh [box height]
+         set bh [+ $bh 254]
+         box move n $bh
+         incr i
+      }
+      set bp [box position]
+      set bpx [lindex $bp 0]
+      box position $bpx $starty
+      box move e 12700
+   }
+   resumeall
+}
+
+# NxN array cap devices
+
+proc cap_array {n devname startx starty {deltax 12700} {deltay 160}} {
+   suspendall
+   box position $startx $starty
+   set i 0
+   for {set x 0} {$x < $n} {incr x} {
+      for {set y 0} {$y < $n} {incr y} {
+
+         set r [int [* [rand] 10]]
+         set w [+ 2.00 [* 1.0 $r]]
+         set r [int [* [rand] 10]]
+         set l [+ 2.00 [* 1.0 $r]]
+         set nx [int [+ 1 [* [rand] 4]]]
+         set ny [int [+ 1 [* [rand] 4]]]
+
+         if {[rand] > 0.5} {set bc 1} else {set bc 0}
+         if {[rand] > 0.5} {set tc 1} else {set tc 0}
+
+         magic::gencell sky130::${devname} ${devname}_$i \
+		w $w l $l nx $nx ny $ny bconnect $bc tconnect $tc
+         select cell ${devname}_$i
+         set bh [box height]
+         set bh [+ $bh $deltay]
+         box move n $bh
+         incr i
+      }
+      set bp [box position]
+      set bpx [lindex $bp 0]
+      box position $bpx $starty
+      box move e $deltax
+   }
+   resumeall
+}
+
+# NxN fixed devices
+
+proc fixed_array {n devname startx starty} {
+   suspendall
+   box position $startx $starty
+   set i 0
+   for {set x 0} {$x < $n} {incr x} {
+      for {set y 0} {$y < $n} {incr y} {
+
+         set nx [int [+ 1 [* [rand] 4]]]
+         set ny [int [+ 1 [* [rand] 4]]]
+
+         # Do not change the deltas---this will cause DRC problems
+         set r 0
+         # set r [int [* [rand] 10]]
+         set deltax [/ $r 10.0]
+         # set r [int [* [rand] 10]]
+         set deltay [/ $r 10.0]
+
+         magic::gencell sky130::${devname} ${devname}_$i \
+		nx $nx ny $ny deltax $deltax deltay $deltay
+         select cell ${devname}_$i
+         set bh [box height]
+         set bh [* $bh [+ $ny 1]]
+         box move n $bh
+         incr i
+      }
+      set bp [box position]
+      set bpx [lindex $bp 0]
+      box position $bpx $starty
+      box move e 20000
+   }
+   resumeall
+}
+
+snap int
+box size 0 0
+ 
+# Layout:
+#  phv
+#        mrl1     mrp1   mrdp   mrdp_hv  
+#  nhv                                  pdiode_h
+#                                       ndiode_h
+#  pshort                               nndiode
+#        xhrpoly  xpwres mrdn   mrdn_hv  pdiode
+#  nshort                               ndiode
+#
+
+mos_array 6 nshort 0 0
+mos_array 6 pshort 0 75000
+mos_array 6 nhv 0 150000 
+mos_array 6 phv 0 225000
+mos_array 6 nlowvt 0 300000
+mos_array 6 sonos_e 0 375000 12700 1650
+mos_array 6 plowvt 0 450000
+mos_array 6 phighvt 0 525000
+mos_array 6 nhvnative 0 600000 
+
+res_array 6 xhrpoly 100000 0
+res_array 6 mrl1 100000 180000
+res_array 6 uhrpoly 100000 360000
+
+res_array 6 xpwres 200000 0 13500 1100
+res_array 6 mrp1 200000 200000
+
+res_array 6 mrdn 300000 0
+res_array 6 mrdp 300000 180000
+
+res_array 6 mrdn_hv 400000 0
+res_array 6 mrdp_hv 400000 180000
+ 
+diode_array 6 ndiode 500000 0
+diode_array 6 pdiode 500000 30000 
+diode_array 6 ndiode_h 500000 60000
+diode_array 6 pdiode_h 500000 90000 
+
+cap_array 6 xcmimc1 600000 0
+cap_array 6 xcmimc2 600000 70000 18000 650
+
+mos_array 6 xcnwvc 700000 0 15000 254
+mos_array 6 xchvnwc 700000 70000 18000 254
+mos_array 6 xcnwvc2 700000 140000 15000 254
+
+fixed_array 2 sky130_fd_pr_rf_npn_1x1 850000 0
+fixed_array 2 sky130_fd_pr_rf_npn_1x2 850000 30000
+fixed_array 2 sky130_fd_pr_rf_pnp5x 850000 60000
+
+fixed_array 2 sky130_fd_pr_rf2_xcmvpp11p5x11p7_lim5shield 900000 0
+fixed_array 2 sky130_fd_pr_rf2_xcmvpp11p5x11p7_m3_lim5shield 900000 30000
+fixed_array 2 sky130_fd_pr_rf2_xcmvpp11p5x11p7_m4shield 900000 60000
+fixed_array 2 sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym4shield 900000 90000
+fixed_array 2 sky130_fd_pr_rf2_xcmvpp4p4x4p6_m3_lim5shield 900000 120000
+fixed_array 2 sky130_fd_pr_rf2_xcmvpp6p8x6p1_lim4shield 900000 150000
+fixed_array 2 sky130_fd_pr_rf2_xcmvpp6p8x6p1_polym4shield 900000 180000
+fixed_array 2 sky130_fd_pr_rf2_xcmvpp8p6x7p9_m3_lim5shield 900000 210000
+fixed_array 2 sky130_fd_pr_rf2_xcmvppx4_2xnhvnative10x4 900000 240000
+# fixed_array 2 sky130_fd_pr_rf2_xcmvpp11p5x11p7_polym50p4shield 900000 270000
+
+fixed_array 2 sky130_fd_pr_rf_xcmvpp11p5x11p7_m3_lishield 950000 0
+fixed_array 2 sky130_fd_pr_rf_xcmvpp11p5x11p7_m3shield 950000 30000
+fixed_array 2 sky130_fd_pr_rf_xcmvpp2 950000 60000
+fixed_array 2 sky130_fd_pr_rf_xcmvpp2_nwell 950000 90000
+fixed_array 2 sky130_fd_pr_rf_xcmvpp4p4x4p6_m3_lishield 950000 120000
+fixed_array 2 sky130_fd_pr_rf_xcmvpp4p4x4p6_m3shield 950000 150000
+fixed_array 2 sky130_fd_pr_rf_xcmvpp8p6x7p9_m3_lishield 950000 180000
+fixed_array 2 sky130_fd_pr_rf_xcmvpp8p6x7p9_m3shield 950000 210000
+# fixed_array 2 sky130_fd_pr_rf_xcmvpp1p8x1p8_lishield 950000 240000
+# fixed_array 2 sky130_fd_pr_rf_xcmvpp1p8x1p8_m3shield 950000 270000
+
+fixed_array 1 balun 1000000 0
+fixed_array 1 xind4_02 1000000 200000
+fixed_array 1 xind4_011 1250000 0
+
+# Draw a deep nwell region around the sonos transistor block
+box values -5200i 369500i 76800i 427500i
+sky130::deep_nwell_draw
+
+save torture_test_sky130
+gds write torture_test_sky130
diff --git a/sky130/sky130_setup.tcl b/sky130/sky130_setup.tcl
new file mode 100644
index 0000000..af90784
--- /dev/null
+++ b/sky130/sky130_setup.tcl
@@ -0,0 +1,296 @@
+###
+###     Source file sky130_setup.tcl
+###     Process this file with the preproc.py processor
+###
+#---------------------------------------------------------------
+# Setup file for netgen LVS
+# SkyWater TECHNAME
+#---------------------------------------------------------------
+permute default
+property default
+property parallel none
+
+#---------------------------------------------------------------
+# For the following, get the cell lists from
+# circuit1 and circuit2.
+#---------------------------------------------------------------
+
+set cells1 [cells list -all -circuit1]
+set cells2 [cells list -all -circuit2]
+
+# NOTE:  In accordance with the LVS manager GUI, the schematic is
+# always circuit2, so some items like property "par1" only need to
+# be specified for circuit2.
+
+#-------------------------------------------
+# Resistors (except metal)
+#-------------------------------------------
+
+set devices {xpwres mrp1 xhrpoly uhrpoly mrdn mrdp mrdn_hv mrdp_hv}
+
+foreach dev $devices {
+    if {[lsearch $cells1 $dev] >= 0} {
+	permute "-circuit1 $dev" 1 2
+	property "-circuit1 $dev" series enable
+	property "-circuit1 $dev" series {w critical}
+	property "-circuit1 $dev" series {l add}
+	property "-circuit1 $dev" parallel enable
+	property "-circuit1 $dev" parallel {l critical}
+	property "-circuit1 $dev" parallel {w add}
+	property "-circuit1 $dev" parallel {value par}
+	property "-circuit1 $dev" tolerance {l 0.01} {w 0.01}
+	# Ignore these properties
+	property "-circuit2 $dev" delete par1 pm
+    }
+    if {[lsearch $cells2 $dev] >= 0} {
+	permute "-circuit2 $dev" 1 2
+	property "-circuit1 $dev" series enable
+	property "-circuit1 $dev" series {w critical}
+	property "-circuit1 $dev" series {l add}
+	property "-circuit1 $dev" parallel enable
+	property "-circuit1 $dev" parallel {l critical}
+	property "-circuit1 $dev" parallel {w add}
+	property "-circuit1 $dev" parallel {value par}
+	property "-circuit1 $dev" tolerance {l 0.01} {w 0.01}
+	# Ignore these properties
+	property "-circuit2 $dev" delete par1 pm
+    }
+}
+
+#-------------------------------------------
+# MRM (metal) resistors
+#-------------------------------------------
+
+set devices {mrl1 mrm1 mrm2 mrm3}
+#ifdef METAL5
+lappend devices mrm4
+lappend devices mrm5
+#endif (METAL5)
+
+foreach dev $devices {
+    if {[lsearch $cells1 $dev] >= 0} {
+	permute "-circuit1 $dev" 1 2
+	property "-circuit1 $dev" series enable
+	property "-circuit1 $dev" series {w critical}
+	property "-circuit1 $dev" series {l add}
+	property "-circuit1 $dev" parallel enable
+	property "-circuit1 $dev" parallel {l critical}
+	property "-circuit1 $dev" parallel {w add}
+	property "-circuit1 $dev" parallel {value par}
+	property "-circuit1 $dev" tolerance {l 0.01} {w 0.01}
+	# Ignore these properties
+	property "-circuit2 $dev" delete par1 pm
+    }
+    if {[lsearch $cells2 $dev] >= 0} {
+	permute "-circuit2 $dev" 1 2
+	property "-circuit1 $dev" series enable
+	property "-circuit1 $dev" series {w critical}
+	property "-circuit1 $dev" series {l add}
+	property "-circuit1 $dev" parallel enable
+	property "-circuit1 $dev" parallel {l critical}
+	property "-circuit1 $dev" parallel {w add}
+	property "-circuit1 $dev" parallel {value par}
+	property "-circuit1 $dev" tolerance {l 0.01} {w 0.01}
+	# Ignore these properties
+	property "-circuit2 $dev" delete par1 pm
+    }
+}
+
+#-------------------------------------------
+# (MOS) transistors
+#-------------------------------------------
+
+set devices {nshort nlowvt sonos_e nhvnative nhv pshort plowvt phighvt phv}
+lappend devices xcnwvc
+lappend devices xcnwvc2
+lappend devices xchvnwc
+
+foreach dev $devices {
+    if {[lsearch $cells1 $dev] >= 0} {
+	permute "-circuit1 $dev" 1 3
+	property "-circuit1 $dev" parallel enable
+	property "-circuit1 $dev" parallel {l critical}
+	property "-circuit1 $dev" parallel {w add}
+	property "-circuit1 $dev" tolerance {w 0.01} {l 0.01}
+	# Ignore these properties
+	property "-circuit2 $dev" delete par1 NRD NRS
+    }
+    if {[lsearch $cells2 $dev] >= 0} {
+	permute "-circuit2 $dev" 1 3
+	property "-circuit1 $dev" parallel enable
+	property "-circuit1 $dev" parallel {l critical}
+	property "-circuit1 $dev" parallel {w add}
+	property "-circuit2 $dev" tolerance {w 0.01} {l 0.01}
+	# Ignore these properties
+	property "-circuit2 $dev" delete par1 NRD NRS
+    }
+}
+
+#-------------------------------------------
+# diodes
+#-------------------------------------------
+
+set devices {ndiode ndiode_lvt pdiode pdiode_lvt pdiode_hvt ndiode_h pdiode_h}
+lappend devices ndiode_native
+
+foreach dev $devices {
+    if {[lsearch $cells1 $dev] >= 0} {
+	property "-circuit1 $dev" parallel enable
+	property "-circuit1 $dev" parallel {area add}
+	property "-circuit1 $dev" parallel {value add}
+	property "-circuit1 $dev" tolerance {area 0.02}
+	# Ignore these properties
+	property "-circuit2 $dev" delete par1 peri
+    }
+    if {[lsearch $cells2 $dev] >= 0} {
+	property "-circuit2 $dev" parallel enable
+	property "-circuit1 $dev" parallel {area add}
+	property "-circuit1 $dev" parallel {value add}
+	property "-circuit2 $dev" tolerance {area 0.02}
+	# Ignore these properties
+	property "-circuit2 $dev" delete par1 peri
+    }
+}
+
+#-------------------------------------------
+# capacitors
+# MiM capacitors
+#-------------------------------------------
+
+set devices {xcmimc1 xcmimc2}
+
+foreach dev $devices {
+    if {[lsearch $cells1 $dev] >= 0} {
+	property "-circuit1 $dev" parallel enable
+	property "-circuit1 $dev" parallel {area add}
+	property "-circuit1 $dev" parallel {value add}
+	property "-circuit1 $dev" tolerance {l 0.01} {w 0.01}
+	# Ignore these properties
+	property "-circuit2 $dev" delete par1 pm
+    }
+    if {[lsearch $cells2 $dev] >= 0} {
+	property "-circuit1 $dev" parallel enable
+	property "-circuit1 $dev" parallel {area add}
+	property "-circuit1 $dev" parallel {value add}
+	property "-circuit1 $dev" tolerance {l 0.01} {w 0.01}
+	# Ignore these properties
+	property "-circuit2 $dev" delete par1 pm
+    }
+}
+
+#-------------------------------------------
+# Fixed-layout devices
+# bipolar transistors,
+# VPP capacitors
+#-------------------------------------------
+
+set devices {sky130rf_npn_1x1 sky130rf_npn_1x2 sky130rf_pnp5x}
+#ifdef METAL5
+lappend devices balun xint4_011 xind4_02
+lappend devices sky130rf2_xcmvpp11p5x11p7_lim5shield
+lappend devices sky130rf2_xcmvpp11p5x11p7_m3_lim5shield
+lappend devices sky130rf2_xcmvpp11p5x11p7_m4shield
+lappend devices sky130rf2_xcmvpp11p5x11p7_polym4shield
+lappend devices sky130rf2_xcmvpp11p5x11p7_polym50p4shield
+lappend devices sky130rf2_xcmvpp4p4x4p6_m3_lim5shield
+lappend devices sky130rf2_xcmvpp6p8x6p1_lim4shield
+lappend devices sky130rf2_xcmvpp6p8x6p1_polym4shield
+#endif (METAL5)
+lappend devices sky130rf2_xcmvpp8p6x7p9_m3_lim5shield
+lappend devices sky130rf2_xcmvppx4_2xnhvnative10x4
+lappend devices sky130rf_xcmvpp11p5x11p7_m3_lishield
+lappend devices sky130rf_xcmvpp11p5x11p7_m3shield
+lappend devices sky130rf_xcmvpp1p8x1p8_lishield
+lappend devices sky130rf_xcmvpp1p8x1p8_m3shield
+lappend devices sky130rf_xcmvpp2
+lappend devices sky130rf_xcmvpp2_nwell
+lappend devices sky130rf_xcmvpp4p4x4p6_m3_lishield
+lappend devices sky130rf_xcmvpp4p4x4p6_m3shield
+lappend devices sky130rf_xcmvpp8p6x7p9_m3_lishield
+lappend devices sky130rf_xcmvpp8p6x7p9_m3shield
+
+foreach dev $devices {
+    if {[lsearch $cells1 $dev] >= 0} {
+	property "-circuit1 $dev" parallel enable
+	# Ignore these properties
+	property "-circuit2 $dev" delete par1
+    }
+    if {[lsearch $cells2 $dev] >= 0} {
+	property "-circuit2 $dev" parallel enable
+	# Ignore these properties
+	property "-circuit2 $dev" delete par1
+    }
+}
+
+#---------------------------------------------------------------
+# Digital cells (ignore decap, fill, and tap cells)
+# Make a separate list for each supported library
+#---------------------------------------------------------------
+# e.g., ignore class "-circuit2 sky130_fc_sc_hd_decap_3"
+#---------------------------------------------------------------
+
+foreach cell $cells1 {
+    if {[regexp "sky130_fc_sc_hd_decap_\[0-9\]+" $cell match]} {
+        ignore class "-circuit1 $cell"
+    }
+    if {[regexp "sky130_fc_sc_hd_fill_\[0-9\]+" $cell match]} {
+        ignore class "-circuit1 $cell"
+    }
+}
+foreach cell $cells2 {
+    if {[regexp "sky130_fc_sc_hd_decap_\[0-9\]+" $cell match]} {
+        ignore class "-circuit2 $cell"
+    }
+    if {[regexp "sky130_fc_sc_hd_fill_\[0-9\]+" $cell match]} {
+        ignore class "-circuit2 $cell"
+    }
+}
+
+#---------------------------------------------------------------
+# Handle cells captured from Electric
+#
+# Find cells of the form "<library>__<cellname>" in the netlist
+# from Electric where the extracted layout netlist has only
+# "<cellname>".  Cross-check by ensuring that the full name
+# "<library>__<cellname>" does not exist in both cells, and that
+# the truncated name "<cellname>" does not exist in both cells.
+#---------------------------------------------------------------
+# e.g., hydra_spi_controller__hydra_spi_controller
+#---------------------------------------------------------------
+foreach cell $cells1 {
+    if {[regexp "(.+)__(.+)" $cell match library cellname]} {
+        if {([lsearch $cells2 $cell] < 0) && \
+                ([lsearch $cells2 $cellname] >= 0) && \
+                ([lsearch $cells1 $cellname] < 0)} {
+            equate classes "-circuit1 $cell" "-circuit2 $cellname"
+	    puts stdout "Matching pins of $cell in circuit 1 and $cellname in circuit 2"
+	    equate pins "-circuit1 $cell" "-circuit2 $cellname"
+        }
+    }
+}
+
+foreach cell $cells2 {
+    if {[regexp "(.+)__(.+)" $cell match library cellname]} {
+        if {([lsearch $cells1 $cell] < 0) && \
+                ([lsearch $cells1 $cellname] >= 0) && \
+                ([lsearch $cells2 $cellname] < 0)} {
+            equate classes "-circuit1 $cellname" "-circuit2 $cell"
+	    puts stdout "Matching pins of $cellname in circuit 1 and $cell in circuit 2"
+	    equate pins "-circuit1 $cellname" "-circuit2 $cell"
+        }
+    }
+}
+
+# Match pins on black-box cells if LVS is called with "-blackbox"
+if {[model blackbox]} {
+    foreach cell $cells1 {
+	if {[model "-circuit1 $cell"] == "blackbox"} {
+	    if {[lsearch $cells2 $cell] >= 0} {
+		puts stdout "Matching pins of $cell in circuits 1 and 2"
+		equate pins "-circuit1 $cell" "-circuit2 $cell"
+	    }
+	}
+    }
+}
+
+#---------------------------------------------------------------
diff --git a/sky130/sky130gds.tech b/sky130/sky130gds.tech
new file mode 100644
index 0000000..8beebdc
--- /dev/null
+++ b/sky130/sky130gds.tech
@@ -0,0 +1,689 @@
+tech
+    format 32
+    TECHNAME-GDS
+end
+
+version
+    version REVISION
+    description "SkyWater S8: Vendor GDS layers"
+end
+
+planes
+ p1
+ p2
+ p3
+ p4
+ p5
+ p6
+ p7
+ p8
+ p9
+ p10
+ p11
+ p12
+ p13
+ p14
+ p15
+ p16
+ p17
+ p18
+ p19
+ p20
+ p21
+ p22
+ p23
+ p24
+ p25
+ p26
+ p27
+ p28
+ p29
+ p30
+ p31
+ p32
+ p33
+ p34
+ p35
+ p36
+ p37
+ p38
+ p39
+ p40
+ p41
+ p42
+end
+
+types
+ p1  NWELL,l1
+ p1  NWELLT,l60
+ p1  NWELLP,l62
+ p2  DNWELL,l2
+ p3  DIFF,l3
+ p3  TAP,l4
+ p4  LVTN,l5
+ p4  HVTP,l6
+ p5  HVI,l7
+ p6  TUNM,l8
+ p7  POLY,l9
+ p7  POLYP,l63
+ p7  POLYT,l70
+ p8  NPC,l10
+ p9  PSDM,l11
+ p9  NSDM,l12
+ p10 LICON1,l13
+ p11 LI1,l14
+ p11 LI1T,l15
+ p11 LI1P,l16
+ p12 MCON,l17
+ p12 MET1,l18
+ p12 MET1T,l19
+ p12 MET1P,l20
+ p13 VIA1,l21
+ p13 MET2,l22
+ p13 MET2T,l23
+ p13 MET2P,l24
+ p14 VIA2,l25
+ p14 MET3,l26
+ p14 MET3T,l27
+ p14 MET3P,l28
+ p15 VIA3,l29
+ p15 MET4,l30
+ p15 MET4T,l31
+ p15 MET4P,l32
+ p16 VIA4,l33
+ p16 MET5,l34
+ p16 MET5T,l35
+ p16 MET5P,l36
+ p17 PAD,l37
+ p17 PADT,l38
+ p17 PADP,l39
+ p18 AREAID,l40
+ p19 TEXT,l41
+ p20 HVTR,l42
+ p21 NCM,l43
+ p22 RPM,l44
+ p23 NSM,l45
+ p24 RDL,l46
+ p25 VHVI,l47
+ p26 LDNTM,l48
+ p26 HVNTM,l49
+ p27 PMM,l50
+ p28 PNP,l51
+ p29 CAP,l52
+ p30 IND,l53
+ p31 PWRES,l54
+ p32 POLYRES,l55
+ p33 DIFFRES,l56
+ p34 DIODE,l57
+ p35 POLYM,l58
+ p36 COREID,l59
+ p37 PWELLT,l61
+ p37 PWELLP,l64
+ p38 CFOMDROP,l65
+ p39 CLI1MADD,l66
+ p40 CNTMADD,l67
+ p41 CP1MADD,l68
+ p42 BOUND,l69
+end
+
+contact
+end
+
+styles
+    styletype	mos
+ l1   nwell
+ l2   cwell
+ l3   ndiffusion
+ l4   pdiffusion
+ l5   implant1
+ l6   implant2
+ l7   implant3
+ l8   subcircuit
+ l9    polysilicon
+ l10   implant4
+ l11   pdop_stripes
+ l12   ndop_stripes
+ l13   obsmetal1 contact_X'es
+ l14   metal1
+ l15   metal1
+ l16   metal1
+ l17   metal1 metal2 via1
+ l18   metal2
+ l19   metal2
+ l20   metal2
+ l21   metal2 metal3 via2
+ l22   metal3
+ l23   metal3
+ l24   metal3
+ l25   metal3 metal4 via3
+ l26   metal4
+ l27   metal4
+ l28   metal4
+ l29   metal4 metal5 via4
+ l30   metal5
+ l31   metal5
+ l32   metal5
+ l33   metal5 metal6 via5
+ l34   metal6
+ l35   metal6
+ l36   metal6
+ l37   overglass
+ l38   overglass
+ l39   overglass
+ l40   subcircuit
+ l41   comment
+ l42   implant1
+ l43   mim_top
+ l44   mim_bottom
+ l45   ntransistor_stripes
+ l46   metal7
+ l47   electrode
+ l48   nwell_field_implant
+ l49   hvndiff_mask
+ l50   poly_light
+ l51   mvpdiff
+ l52   mvndiff
+ l53   hvpdiff
+ l54   cwellnsc
+ l55   poly_resist poly_resist_stripes
+ l56   ptransistor_stripes
+ l57   hvpdiff_mask
+ l58   poly_resist
+ l59   subcircuit
+ l60   nwell
+ l61   pwell
+ l62   nwell
+ l63   polysilicon
+ l64   pwell
+ l65   implant1
+ l66   implant2
+ l67   implant3
+ l68   implant4
+ l69   subcircuit
+ l70   polysilicon
+end
+
+compose
+   paint  MCON    MET1  MCON
+   paint  VIA1    MET2  VIA1
+   paint  VIA2    MET3  VIA2
+   paint  VIA3    MET4  VIA3
+   paint  VIA4    MET5  VIA4
+end
+
+connect
+end
+
+cifoutput
+style gdsii
+  scalefactor 50 nanometers
+  options calma-permissive-labels
+ layer  NWELL NWELL,NWELLT,NWELLP
+ calma 64 20
+
+ layer NWELLT
+ labels NWELLT noport
+ calma 64 16
+
+ layer NWELLP
+ labels NWELLP port
+ calma 64 5
+
+ layer  DNWELL DNWELL
+ labels DNWELL 
+ calma 64 18
+
+ layer  DIFF DIFF
+ labels DIFF 
+ calma 65 20
+
+ layer  TAP TAP
+ labels TAP 
+ calma 65 44
+
+ layer  POLY POLY,POLYP,POLYT
+ calma 66 20
+
+ layer POLYT
+ labels POLYT noport
+ calma 66 16
+
+ layer POLYP
+ labels POLYP port
+ calma 66 5
+
+ layer  LVTN LVTN
+ labels LVTN 
+ calma 125 44
+
+ layer  HVTP HVTP
+ labels HVTP 
+ calma 78 44
+
+ layer  HVI HVI
+ labels HVI 
+ calma 75 20
+
+ layer  TUNM TUNM
+ labels TUNM 
+ calma 80 20
+
+ layer  NPC NPC
+ labels NPC 
+ calma 95 20
+
+ layer  PSDM PSDM
+ labels PSDM 
+ calma 94 20
+
+ layer  NSDM NSDM
+ labels NSDM 
+ calma 93 44
+
+ layer  LICON1 LICON1
+ labels LICON1 
+ calma 66 44
+
+ # Note: LICON1 not on LI1 plane, may not be coincident with LI1.
+ layer  LI1 LI1,LI1T,LI1P
+ calma 67 20
+
+ layer  LI1T
+ labels LI1T noport
+ calma 67 16
+
+ layer  LI1P
+ labels LI1P port
+ calma 67 5
+
+ layer  MET1 MET1,MET1T,MET1P,MCON
+ calma 68 20
+
+ layer  MET1T
+ labels MET1T noport
+ calma 68 16
+
+ layer  MET1P
+ labels MET1P port
+ calma 68 5
+
+ layer  MCON MCON
+ labels MCON 
+ calma 67 44
+
+ layer  MET2 MET2,MET2T,MET2P,VIA1
+ calma 69 20
+
+ layer  MET2T
+ labels MET2T noport
+ calma 69 16
+
+ layer  MET2P
+ labels MET2P port
+ calma 69 5
+
+ layer  VIA1 VIA1
+ labels VIA1 
+ calma 68 44
+
+ layer  MET3 MET3,MET3T,MET3P,VIA2
+ calma 70 20
+
+ layer  MET3T
+ labels MET3T noport
+ calma 70 16
+
+ layer  MET3P
+ labels MET3P port
+ calma 70 5
+
+ layer  VIA2 VIA2
+ labels VIA2 
+ calma 69 44
+
+ layer  MET4 MET4,MET4T,MET4P,VIA3
+ calma 71 20
+
+ layer  MET4T
+ labels MET4T noport
+ calma 71 16
+
+ layer  MET4P
+ labels MET4P port
+ calma 71 5
+
+ layer  VIA3 VIA3
+ labels VIA3 
+ calma 70 44
+
+ layer  MET5 MET5,MET5T,MET5P,VIA4
+ calma 72 20
+
+ layer  MET5T
+ labels MET5T noport
+ calma 72 16
+
+ layer  MET5P
+ labels MET5P port
+ calma 72 5
+
+ layer  VIA4 VIA4
+ labels VIA4 
+ calma 71 44
+
+ layer  PAD PAD,PADT,PADP
+ calma 76 20
+
+ layer  PADT
+ labels PADT noport
+ calma 76 16
+
+ layer  PADP
+ labels PADP port
+ calma 76 5
+
+ layer  AREAID AREAID
+ labels AREAID
+ calma 81 4
+
+ layer  TEXT TEXT
+ labels TEXT
+ calma 83 44
+
+ layer HVTR HVTR
+ labels HVTR
+ calma 18 20
+
+ layer NCM NCM
+ labels NCM
+ calma 92 44
+
+ layer RPM RPM
+ labels RPM
+ calma 86 20
+
+ layer NSM NSM
+ labels NSM
+ calma 61 20
+
+ layer RDL RDL
+ labels RDL
+ calma 74 20
+
+ layer VHVI VHVI
+ labels VHVI
+ calma 74 21
+
+ layer LDNTM LDNTM
+ labels LDNTM
+ calma 11 44
+
+ layer HVNTM HVNTM
+ labels HVNTM
+ calma 125 20
+
+ layer PMM PMM
+ labels PMM
+ calma 85 44
+
+ layer PNP PNP
+ labels PNP
+ calma 82 44
+
+ layer CAP CAP
+ labels CAP
+ calma 82 64
+
+ layer IND IND
+ labels IND
+ calma 82 24
+
+ layer PWRES PWRES
+ labels PWRES
+ calma 64 13
+
+ layer POLYRES POLYRES
+ labels POLYRES
+ calma 66 13
+
+ layer DIFFRES DIFFRES
+ labels DIFFRES
+ calma 65 13
+
+ layer DIODE DIODE
+ labels DIODE
+ calma 81 23
+
+ layer POLYM POLYM
+ labels POLYM
+ calma 66 83
+
+ layer COREID COREID
+ labels COREID
+ calma 81 2
+
+ layer PWELLT PWELLT
+ labels PWELLT noport
+ calma 122 16
+
+ layer PWELLP PWELLP
+ labels PWELLP port
+ calma 64 59
+
+ layer CFOMDROP CFOMDROP
+ labels CFOMDROP
+ calma 22 22
+
+ layer CLI1MADD CLI1MADD
+ labels CLI1MADD
+ calma 115 43
+
+ layer CNTMADD CNTMADD
+ labels CNTMADD
+ calma 22 21
+
+ layer CP1MADD CP1MADD
+ labels CP1MADD
+ calma 33 43
+
+ layer BOUND BOUND
+ labels BOUND
+ calma 235 4
+end
+
+cifinput
+style ProgName
+  scalefactor 50 nanometers
+ layer l1  NWELL
+ layer l2  DNWELL
+ layer l3  DIFF
+ layer l4  TAP
+ layer l5  LVTN
+ layer l6  HVTP
+ layer l7  HVI
+ layer l8  TUNM
+ layer l9  POLY
+ layer l10 NPC
+ layer l11 PSDM
+ layer l12 NSDM
+ layer l13 LICON1
+ layer l14 LI1
+ layer l15 LI1T
+ layer l16 LI1P
+ layer l17 MCON
+ layer l18 MET1
+ layer l19 MET1T
+ layer l20 MET1P
+ layer l21 VIA1
+ layer l22 MET2
+ layer l23 MET2T
+ layer l24 MET2P
+ layer l25 VIA2
+ layer l26 MET3
+ layer l27 MET3T
+ layer l28 MET3P
+ layer l29 VIA3
+ layer l30 MET4
+ layer l31 MET4T
+ layer l32 MET4P
+ layer l33 VIA4
+ layer l34 MET5
+ layer l35 MET5T
+ layer l36 MET5P
+ layer l37 PAD
+ layer l38 PADT
+ layer l39 PADP
+ layer l40 AREAID
+ layer l41 TEXT
+ layer l42 HVTR
+ layer l43 NCM
+ layer l44 RPM
+ layer l45 NSM
+ layer l46 RDL
+ layer l47 VHVI
+ layer l48 LDNTM
+ layer l49 HVNTM
+ layer l50 PMM
+ layer l51 PNP
+ layer l52 CAP
+ layer l53 IND
+ layer l54 PWRES
+ layer l55 POLYRES
+ layer l56 DIFFRES
+ layer l57 DIODE
+ layer l58 POLYM
+ layer l59 COREID
+ layer l60 NWELLT
+ layer l61 PWELLT
+ layer l62 NWELLP
+ layer l63 POLYP
+ layer l64 PWELLP
+ layer l65 CFOMDROP
+ layer l66 CLI1MADD
+ layer l67 CNTMADD
+ layer l68 CP1MADD
+ layer l69 BOUND
+ layer l70 POLYT
+ calma NWELL  64 20
+ calma DNWELL 64 18
+ calma DIFF   65 20
+ calma TAP    65 44
+ calma LVTN  125 44
+ calma HVTP   78 44
+ calma HVI    75 20
+ calma TUNM   80 20
+ calma POLY   66 20
+ calma NPC    95 20
+ calma PSDM   94 20
+ calma NSDM   93 44
+ calma LICON1 66 44
+ calma LI1    67 20
+ calma LI1T   67 16
+ calma LI1P   67 5
+ calma MCON   67 44
+ calma MET1   68 20
+ calma MET1T  68 16
+ calma MET1P  68 5
+ calma VIA1   68 44
+ calma MET2   69 20
+ calma MET2T  69 16
+ calma MET2P  69 5
+ calma VIA2   69 44
+ calma MET3   70 20
+ calma MET3T  70 16
+ calma MET3P  70 5
+ calma VIA3   70 44
+ calma MET4   71 20
+ calma MET4T  71 16
+ calma MET4P  71 5
+ calma VIA4   71 44
+ calma MET5   72 20
+ calma MET5T  72 16
+ calma MET5P  72 5
+ calma PAD    76 20
+ calma PADT   76 16
+ calma PADP   76 5
+ calma AREAID 81 4
+ calma TEXT   83 44
+ calma HVTR   18 20
+ calma NCM    92 44
+ calma RPM    86 20
+ calma NSM    61 20
+ calma RDL    74 20
+ calma VHVI   74 21
+ calma LDNTM  11 44
+ calma HVNTM 125 20
+ calma PMM    85 44
+ calma PNP    82 44
+ calma CAP    82 64
+ calma IND    82 24
+ calma PWRES  64 13
+ calma POLYRES 66 13
+ calma DIFFRES 65 13
+ calma DIODE  81 23
+ calma POLYM  66 83
+ calma COREID 81 2
+ calma NWELLT  64 16
+ calma PWELLT 122 16
+ calma NWELLP  64 5
+ calma POLYP  66 5
+ calma PWELLP 64 59
+ calma CFOMDROP 22 22
+ calma CLI1MADD 115 43
+ calma CNTMADD  22 21
+ calma CP1MADD  33 43
+ calma BOUND  235 4
+ calma POLYT  66 16
+end
+ 
+mzrouter
+end
+
+drc
+end
+
+extract
+style default
+ planeorder p1 0
+ planeorder p2 1
+ planeorder p3 2
+ planeorder p4 3
+ planeorder p5 4
+ planeorder p6 5
+ planeorder p7 6
+ planeorder p8 7
+ planeorder p9 8
+ planeorder p10 9
+ planeorder p11 10
+ planeorder p12 11
+ planeorder p13 12
+ planeorder p14 13
+ planeorder p15 14
+ planeorder p16 15
+ planeorder p17 16
+ planeorder p18 17
+ planeorder p19 18
+ planeorder p20 19
+ planeorder p21 20
+ planeorder p22 21
+ planeorder p23 22
+ planeorder p24 23
+ planeorder p25 24
+ planeorder p26 25
+ planeorder p27 26
+ planeorder p28 27
+ planeorder p29 28
+ planeorder p30 29
+ planeorder p31 30
+ planeorder p32 31
+ planeorder p33 32
+ planeorder p34 33
+ planeorder p35 34
+ planeorder p36 35
+ planeorder p37 36
+ planeorder p38 37
+ planeorder p39 38
+ planeorder p40 39
+ planeorder p41 40
+ planeorder p42 41
+end
diff --git a/sky130/sky130osu.sh b/sky130/sky130osu.sh
new file mode 100644
index 0000000..4afd9bd
--- /dev/null
+++ b/sky130/sky130osu.sh
@@ -0,0 +1,93 @@
+#!/bin/tcsh
+#---------------------------------------------------------------
+# Shell script setting up all variables used by the qflow scripts
+# for this project
+#---------------------------------------------------------------
+
+# The LEF file containing standard cell macros
+
+#ifdef EF_FORMAT
+set leffile=STAGING_PATH/TECHNAME/libs.ref/lef/sky130_osu130/sky130_osu130.lef
+#else (!EF_FORMAT)
+set leffile=STAGING_PATH/TECHNAME/libs.ref/sky130_osu130/lef/sky130_osu130.lef
+#endif (!EF_FORMAT)
+
+# The SPICE netlist containing subcell definitions for all the standard cells
+#ifdef EF_FORMAT
+set spicefile=STAGING_PATH/TECHNAME/libs.ref/spice/sky130_osu130/sky130_osu130.spice
+#else (!EF_FORMAT)
+set spicefile=STAGING_PATH/TECHNAME/libs.ref/sky130_osu130/spice/sky130_osu130.spice
+#endif (!EF_FORMAT)
+
+# The liberty format file containing standard cell timing and function information
+#ifdef EF_FORMAT
+set libertyfile=STAGING_PATH/TECHNAME/libs.ref/lib/sky130_osu130/sky130_osu130.lib
+#else (!EF_FORMAT)
+set libertyfile=STAGING_PATH/TECHNAME/libs.ref/sky130_osu130/lib/sky130_osu130.lib
+#endif (!EF_FORMAT)
+
+# If there is another LEF file containing technology information
+# that is separate from the file containing standard cell macros,
+# set this.  Otherwise, leave it defined as an empty string.
+
+#ifdef METAL5
+#ifdef EF_FORMAT
+set techleffile=STAGING_PATH/TECHNAME/libs.ref/techLEF/sky130_osu130/sky130_osu130_tech.lef
+#else (!EF_FORMAT)
+set techleffile=STAGING_PATH/TECHNAME/libs.ref/sky130_osu130/techLEF/sky130_osu130_tech.lef
+#endif (!EF_FORMAT)
+#else
+# NOTE:  There is no technology LEF file for the 3-metal stack!
+#endif
+
+# All cells below should be the lowest output drive strength value,
+# if the standard cell set has multiple cells with different drive
+# strengths.  Comment out any cells that do not exist.
+
+set bufcell=BUFX2		;# Minimum drive strength buffer cell
+set bufpin_in=A			;# Name of input port to buffer cell
+set bufpin_out=Y		;# Name of output port to buffer cell
+set clkbufcell=BUFX2		;# Minimum drive strength buffer cell
+set clkbufpin_in=A		;# Name of input port to buffer cell
+set clkbufpin_out=Y		;# Name of output port to buffer cell
+
+set fillcell=FILL		;# Spacer (filler) cell (prefix, if more than one)
+set decapcell=""		;# Decap (filler) cell (prefix, if more than one)
+set antennacell=""		;# Antenna (filler) cell (prefix, if more than one)
+set antennapin_in=""		;# Antenna cell input connection
+set bodytiecell=""		;# Body tie (filler) cell (prefix, if more than one)
+
+# yosys tries to eliminate use of these; depends on source .v
+set tiehi=""			;# Cell to connect to power, if one exists
+set tiehipin_out=""		;# Output pin name of tiehi cell, if it exists
+set tielo=""			;# Cell to connect to ground, if one exists
+set tielopin_out=""		;# Output pin name of tielo cell, if it exists
+
+set gndnet="vdd"		;# Name used for ground pins in standard cells
+set vddnet="vss"		;# Name used for power pins in standard cells
+
+set separator=""		;# Separator between gate names and drive strengths
+set techfile=STAGING_PATH/TECHNAME/MAGIC_CURRENT/TECHNAME.tech	    ;# magic techfile
+set magicrc=STAGING_PATH/TECHNAME/MAGIC_CURRENT/TECHNAME.magicrc    ;# magic startup script
+set magic_display="XR" 	;# magic display, defeat display query and OGL preference
+set netgen_setup=STAGING_PATH/TECHNAME/libs.tech/netgen/TECHNAME_setup.tcl	;# netgen setup file for LVS
+#ifdef EF_FORMAT
+set gdsfile=STAGING_PATH/TECHNAME/libs.ref/gds/sky130_osu130/sky130_osu130.gds	;# GDS database of standard cells
+set verilogfile=STAGING_PATH/TECHNAME/libs.ref/verilog/sky130_osu130/sky130_osu130.v	;# Verilog models of standard cells
+#else (!EF_FORMAT)
+set gdsfile=STAGING_PATH/TECHNAME/libs.ref/sky130_osu130/gds/sky130_osu130.gds	;# GDS database of standard cells
+set verilogfile=STAGING_PATH/TECHNAME/libs.ref/sky130_osu130/verilog/sky130_osu130.v	;# Verilog models of standard cells
+#endif (!EF_FORMAT)
+
+# Set a conditional default in the project_vars.sh file for this process
+set postproc_options=""
+#ifdef METAL5
+# Normally one does not want to use the top metal for signal routing
+set route_layers = 5
+#else
+set route_layers = 3
+#endif
+set fill_ratios="100,0,0,0"
+set fanout_options="-l 100 -c 10"
+set addspacers_options="-stripe 1.6 40.0 PG"
+set xspice_options="-io_time=250p -time=50p -idelay=20p -odelay=50p -cload=250f"