diff --git a/VERSION b/VERSION
index 4418310..fbd4dd6 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.280
+1.0.281
diff --git a/sky130/Makefile.in b/sky130/Makefile.in
index 2bb53bc..a5a7b84 100644
--- a/sky130/Makefile.in
+++ b/sky130/Makefile.in
@@ -781,7 +781,7 @@
 	mkdir -p ${IRSIM_STAGING_$*}
 	rm -f ${IRSIM_STAGING_$*}/${SKY130$*}_*.prm
 	for corner in ${IRSIM_CORNERS} ; do \
-	    cp irsim/sky130A_$$corner.prm \
+	    cat irsim/header.txt irsim/sky130_$$corner.prm > \
 		${IRSIM_STAGING_$*}/${SKY130$*}_$$corner.prm ; \
 	done
 
diff --git a/sky130/irsim/README b/sky130/irsim/README
index f527873..43d24c1 100644
--- a/sky130/irsim/README
+++ b/sky130/irsim/README
@@ -59,3 +59,7 @@
 	Cox = Eox / Tox  =  8.854E-12 F/m * 3.9 / 4.15E-9 = 8.32E-3 F/m^2 = pF/um^2
 
 The other cap values need to be looked up and corrected. . . 
+
+NOTE:  2/7/2022:  Added "device" lines to header.txt for compability between the
+subcircuit devices used by the sky130 process, and IRSIM version 9.7.113, which
+adds the parsing for the new "device" syntax in the parameter file.
diff --git a/sky130/irsim/header.txt b/sky130/irsim/header.txt
index 03e1494..73cccce 100644
--- a/sky130/irsim/header.txt
+++ b/sky130/irsim/header.txt
@@ -19,3 +19,28 @@
 subparea 0      ; poly over transistor won't count as part pf bulk-poly cap.
 diffext  0      ; diffusion extension for each transistor
 
+device nfet sky130_fd_pr__nfet_01v8
+device nfet sky130_fd_pr__nfet_01v8_lvt
+device nfet sky130_fd_pr__nfet_g5v0d10v5
+device pfet sky130_fd_pr__pfet_01v8
+device pfet sky130_fd_pr__pfet_01v8_lvt
+device pfet sky130_fd_pr__pfet_01v8_mvt
+device pfet sky130_fd_pr__pfet_01v8_hvt
+device pfet sky130_fd_pr__pfet_g5v0d10v5
+; Capacitor values are in pF/centimicron^2
+device capacitor sky130_fd_pr__cap_mim_m3_1 2.0E-7
+device capacitor sky130_fd_pr__cap_mim_m3_2 2.0E-7
+; Resistor values are in ohms/square
+device resistor sky130_res_high_po_0p35   320
+device resistor sky130_res_high_po_0p69   320
+device resistor sky130_res_high_po_1p41   320
+device resistor sky130_res_high_po_2p85   320
+device resistor sky130_res_high_po_5p73   320
+device resistor sky130_res_xhigh_po_0p35 2000
+device resistor sky130_res_xhigh_po_0p69 2000
+device resistor sky130_res_xhigh_po_1p41 2000
+device resistor sky130_res_xhigh_po_2p85 2000
+device resistor sky130_res_xhigh_po_5p73 2000
+device resistor sky130_res_generic_nd     120
+device resistor sky130_res_generic_pd     197
+
diff --git a/sky130/irsim/sky130A_1v62_27.prm b/sky130/irsim/sky130A_1v62_27.prm
deleted file mode 100644
index c2907a5..0000000
--- a/sky130/irsim/sky130A_1v62_27.prm
+++ /dev/null
@@ -1,28 +0,0 @@
-;
-; configuration file for sky130 (0.13um process)
-;
-
-lambda  0.005 ; length scaling, microns (1 lambda = 1 centimicron)
-
-capga   .00832 ; 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-high	0.8	0.2	40227.0
-resistance n-channel dynamic-low		0.8	0.2	3549.0
-resistance n-channel static		0.8	0.2	4518.0
-
-resistance p-channel dynamic-high	1.0	0.2	8694.0
-resistance p-channel dynamic-low		1.0	0.2	662526.0
-resistance p-channel static		1.0	0.2	5762.0
diff --git a/sky130/irsim/sky130A_1v62_n40.prm b/sky130/irsim/sky130A_1v62_n40.prm
deleted file mode 100644
index 6fe1485..0000000
--- a/sky130/irsim/sky130A_1v62_n40.prm
+++ /dev/null
@@ -1,28 +0,0 @@
-;
-; configuration file for sky130 (0.13um process)
-;
-
-lambda  0.005 ; length scaling, microns (1 lambda = 1 centimicron)
-
-capga   .00832 ; 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-high	0.8	0.2	108132.0
-resistance n-channel dynamic-low		0.8	0.2	6704.0
-resistance n-channel static		0.8	0.2	2838.0
-
-resistance p-channel dynamic-high	1.0	0.2	14294.0
-resistance p-channel dynamic-low		1.0	0.2	5584975.0
-resistance p-channel static		1.0	0.2	-8337.0
diff --git a/sky130/irsim/sky130A_1v62_n5.prm b/sky130/irsim/sky130A_1v62_n5.prm
deleted file mode 100644
index 90cd9bc..0000000
--- a/sky130/irsim/sky130A_1v62_n5.prm
+++ /dev/null
@@ -1,28 +0,0 @@
-;
-; configuration file for sky130 (0.13um process)
-;
-
-lambda  0.005 ; length scaling, microns (1 lambda = 1 centimicron)
-
-capga   .00832 ; 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-high	0.8	0.2	65335.0
-resistance n-channel dynamic-low		0.8	0.2	6857.0
-resistance n-channel static		0.8	0.2	2987.0
-
-resistance p-channel dynamic-high	1.0	0.2	14543.0
-resistance p-channel dynamic-low		1.0	0.2	1684744.0
-resistance p-channel static		1.0	0.2	-7823.0
diff --git a/sky130/irsim/sky130A_1v80_125.prm b/sky130/irsim/sky130A_1v80_125.prm
deleted file mode 100644
index 4462782..0000000
--- a/sky130/irsim/sky130A_1v80_125.prm
+++ /dev/null
@@ -1,28 +0,0 @@
-;
-; configuration file for sky130 (0.13um process)
-;
-
-lambda  0.005 ; length scaling, microns (1 lambda = 1 centimicron)
-
-capga   .00832 ; 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-high	0.8	0.2	14005.0
-resistance n-channel dynamic-low		0.8	0.2	3516.0
-resistance n-channel static		0.8	0.2	3719.0
-
-resistance p-channel dynamic-high	1.0	0.2	7852.0
-resistance p-channel dynamic-low		1.0	0.2	73111.0
-resistance p-channel static		1.0	0.2	5295.0
diff --git a/sky130/irsim/sky130A_1v80_27.prm b/sky130/irsim/sky130A_1v80_27.prm
deleted file mode 100644
index 0505c58..0000000
--- a/sky130/irsim/sky130A_1v80_27.prm
+++ /dev/null
@@ -1,28 +0,0 @@
-;
-; configuration file for sky130 (0.13um process)
-;
-
-lambda  0.005 ; length scaling, microns (1 lambda = 1 centimicron)
-
-capga   .00832 ; 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-high	0.8	0.2	18174.0
-resistance n-channel dynamic-low		0.8	0.2	3195.0
-resistance n-channel static		0.8	0.2	3335.0
-
-resistance p-channel dynamic-high	1.0	0.2	7482.0
-resistance p-channel dynamic-low		1.0	0.2	204714.0
-resistance p-channel static		1.0	0.2	4204.0
diff --git a/sky130/irsim/sky130A_1v80_n40.prm b/sky130/irsim/sky130A_1v80_n40.prm
deleted file mode 100644
index 0d67be8..0000000
--- a/sky130/irsim/sky130A_1v80_n40.prm
+++ /dev/null
@@ -1,28 +0,0 @@
-;
-; configuration file for sky130 (0.13um process)
-;
-
-lambda  0.005 ; length scaling, microns (1 lambda = 1 centimicron)
-
-capga   .00832 ; 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-high	0.8	0.2	27589.0
-resistance n-channel dynamic-low		0.8	0.2	3019.0
-resistance n-channel static		0.8	0.2	3101.0
-
-resistance p-channel dynamic-high	1.0	0.2	7192.0
-resistance p-channel dynamic-low		1.0	0.2	913408.0
-resistance p-channel static		1.0	0.2	3520.0
diff --git a/sky130/irsim/sky130A_1v80_n5.prm b/sky130/irsim/sky130A_1v80_n5.prm
deleted file mode 100644
index 0260997..0000000
--- a/sky130/irsim/sky130A_1v80_n5.prm
+++ /dev/null
@@ -1,28 +0,0 @@
-;
-; configuration file for sky130 (0.13um process)
-;
-
-lambda  0.005 ; length scaling, microns (1 lambda = 1 centimicron)
-
-capga   .00832 ; 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-high	0.8	0.2	21254.0
-resistance n-channel dynamic-low		0.8	0.2	3106.0
-resistance n-channel static		0.8	0.2	3220.0
-
-resistance p-channel dynamic-high	1.0	0.2	7350.0
-resistance p-channel dynamic-low		1.0	0.2	371015.0
-resistance p-channel static		1.0	0.2	3867.0
diff --git a/sky130/irsim/sky130A_1v98_125.prm b/sky130/irsim/sky130A_1v98_125.prm
deleted file mode 100644
index a6992c6..0000000
--- a/sky130/irsim/sky130A_1v98_125.prm
+++ /dev/null
@@ -1,28 +0,0 @@
-;
-; configuration file for sky130 (0.13um process)
-;
-
-lambda  0.005 ; length scaling, microns (1 lambda = 1 centimicron)
-
-capga   .00832 ; 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-high	0.8	0.2	10002.0
-resistance n-channel dynamic-low		0.8	0.2	3230.0
-resistance n-channel static		0.8	0.2	2957.0
-
-resistance p-channel dynamic-high	1.0	0.2	7027.0
-resistance p-channel dynamic-low		1.0	0.2	44348.0
-resistance p-channel static		1.0	0.2	4191.0
diff --git a/sky130/irsim/sky130A_1v98_27.prm b/sky130/irsim/sky130A_1v98_27.prm
deleted file mode 100644
index 635cd07..0000000
--- a/sky130/irsim/sky130A_1v98_27.prm
+++ /dev/null
@@ -1,28 +0,0 @@
-;
-; configuration file for sky130 (0.13um process)
-;
-
-lambda  0.005 ; length scaling, microns (1 lambda = 1 centimicron)
-
-capga   .00832 ; 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-high	0.8	0.2	10925.0
-resistance n-channel dynamic-low		0.8	0.2	2949.0
-resistance n-channel static		0.8	0.2	2583.0
-
-resistance p-channel dynamic-high	1.0	0.2	6683.0
-resistance p-channel dynamic-low		1.0	0.2	82493.0
-resistance p-channel static		1.0	0.2	3232.0
diff --git a/sky130/irsim/sky130A_1v98_n40.prm b/sky130/irsim/sky130A_1v98_n40.prm
deleted file mode 100644
index 3047588..0000000
--- a/sky130/irsim/sky130A_1v98_n40.prm
+++ /dev/null
@@ -1,28 +0,0 @@
-;
-; configuration file for sky130 (0.13um process)
-;
-
-lambda  0.005 ; length scaling, microns (1 lambda = 1 centimicron)
-
-capga   .00832 ; 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-high	0.8	0.2	12455.0
-resistance n-channel dynamic-low		0.8	0.2	2795.0
-resistance n-channel static		0.8	0.2	2364.0
-
-resistance p-channel dynamic-high	1.0	0.2	6425.0
-resistance p-channel dynamic-low		1.0	0.2	216474.0
-resistance p-channel static		1.0	0.2	2648.0
diff --git a/sky130/irsim/sky130A_1v98_n5.prm b/sky130/irsim/sky130A_1v98_n5.prm
deleted file mode 100644
index b3b05c9..0000000
--- a/sky130/irsim/sky130A_1v98_n5.prm
+++ /dev/null
@@ -1,28 +0,0 @@
-;
-; configuration file for sky130 (0.13um process)
-;
-
-lambda  0.005 ; length scaling, microns (1 lambda = 1 centimicron)
-
-capga   .00832 ; 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-high	0.8	0.2	11492.0
-resistance n-channel dynamic-low		0.8	0.2	2872.0
-resistance n-channel static		0.8	0.2	2474.0
-
-resistance p-channel dynamic-high	1.0	0.2	6564.0
-resistance p-channel dynamic-low		1.0	0.2	119412.0
-resistance p-channel static		1.0	0.2	2943.0