diff --git a/Makefile b/Makefile
index efe9ded..2b6cc2c 100644
--- a/Makefile
+++ b/Makefile
@@ -77,20 +77,19 @@
 dv-targets-gl-sdf=$(dv_patterns:%=verify-%-gl-sdf)
 
 TARGET_PATH=$(shell pwd)
-verify_command="cd ${TARGET_PATH}/verilog/dv/$* && export SIM=${SIM} && make"
+verify_command="source ~/.bashrc && cd ${TARGET_PATH}/verilog/dv/$* && export SIM=${SIM} && make"
 dv_base_dependencies=simenv
 docker_run_verify=\
 	docker run -v ${TARGET_PATH}:${TARGET_PATH} -v ${PDK_ROOT}:${PDK_ROOT} \
 		-v ${CARAVEL_ROOT}:${CARAVEL_ROOT} \
 		-e TARGET_PATH=${TARGET_PATH} -e PDK_ROOT=${PDK_ROOT} \
 		-e CARAVEL_ROOT=${CARAVEL_ROOT} \
-		-e TOOLS=/opt/riscv32i \
+		-e TOOLS=/foss/tools/riscv-gnu-toolchain-rv32i/217e7f3debe424d61374d31e33a091a630535937 \
 		-e DESIGNS=$(TARGET_PATH) \
 		-e PDK=$(PDK) \
 		-e CORE_VERILOG_PATH=$(TARGET_PATH)/mgmt_core_wrapper/verilog \
-		-e GCC_PREFIX=riscv32-unknown-elf \
 		-e MCW_ROOT=$(MCW_ROOT) \
-		-u $$(id -u $$USER):$$(id -g $$USER) efabless/dv_setup:latest \
+		-u $$(id -u $$USER):$$(id -g $$USER) efabless/dv:latest \
 		sh -c $(verify_command)
 
 .PHONY: harden
diff --git a/verilog/dv/io_ports/io_ports_tb.v b/verilog/dv/io_ports/io_ports_tb.v
index cf66d3f..b7e957f 100644
--- a/verilog/dv/io_ports/io_ports_tb.v
+++ b/verilog/dv/io_ports/io_ports_tb.v
@@ -44,6 +44,101 @@
 		clock = 0;
 	end
 
+
+	`ifdef ENABLE_SDF
+		initial begin
+			$sdf_annotate("../../../sdf/user_proj_example.sdf", uut.mprj) ;
+			$sdf_annotate("../../../sdf/user_project_wrapper.sdf", uut.mprj.mprj) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/DFFRAM.sdf", uut.soc.DFFRAM_0) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/mgmt_core.sdf", uut.soc.core) ;
+			$sdf_annotate("../../../caravel/sdf/housekeeping.sdf", uut.housekeeping) ;
+			$sdf_annotate("../../../caravel/sdf/chip_io.sdf", uut.padframe) ;
+			$sdf_annotate("../../../caravel/sdf/mprj_logic_high.sdf", uut.mgmt_buffers.mprj_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mprj2_logic_high.sdf", uut.mgmt_buffers.mprj2_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect_hv.sdf", uut.mgmt_buffers.powergood_check) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect.sdf", uut.mgmt_buffers) ;
+			$sdf_annotate("../../../caravel/sdf/caravel_clocking.sdf", uut.clocking) ;
+			$sdf_annotate("../../../caravel/sdf/digital_pll.sdf", uut.pll) ;
+			$sdf_annotate("../../../caravel/sdf/xres_buf.sdf", uut.rstb_level) ;
+			$sdf_annotate("../../../caravel/sdf/user_id_programming.sdf", uut.user_id_value) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[11] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[12] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[13] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[14] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[15] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_0) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_1) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_2) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_3) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_4) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_5) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_6) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_7) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_8) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_9) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_10) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_11) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_12) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_13) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_14) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_15) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_16) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_17) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_18) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_19) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_20) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_21) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_22) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_23) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_24) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_25) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_26) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_27) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_28) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_29) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_30) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_31) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_32) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_33) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_34) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_35) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_36) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_37) ;
+		end
+	`endif 
+
 	initial begin
 		$dumpfile("io_ports.vcd");
 		$dumpvars(0, io_ports_tb);
@@ -91,7 +186,7 @@
 		CSB  <= 1'b1;		// Force CSB high
 		#2000;
 		RSTB <= 1'b1;	    	// Release reset
-		#300000;
+		#3_00_000;
 		CSB = 1'b0;		// CSB can be released
 	end
 
diff --git a/verilog/dv/io_ports_bid/Makefile b/verilog/dv/io_ports_bid/Makefile
new file mode 100644
index 0000000..3fd0b56
--- /dev/null
+++ b/verilog/dv/io_ports_bid/Makefile
@@ -0,0 +1,32 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+
+ 
+PWDD := $(shell pwd)
+BLOCKS := $(shell basename $(PWDD))
+
+# ---- Include Partitioned Makefiles ----
+
+CONFIG = caravel_user_project
+
+
+include $(MCW_ROOT)/verilog/dv/make/env.makefile
+include $(MCW_ROOT)/verilog/dv/make/var.makefile
+include $(MCW_ROOT)/verilog/dv/make/cpu.makefile
+include $(MCW_ROOT)/verilog/dv/make/sim.makefile
+
+
diff --git a/verilog/dv/io_ports_bid/io_ports_bid.c b/verilog/dv/io_ports_bid/io_ports_bid.c
new file mode 100644
index 0000000..4405eec
--- /dev/null
+++ b/verilog/dv/io_ports_bid/io_ports_bid.c
@@ -0,0 +1,75 @@
+/*
+ * SPDX-FileCopyrightText: 2020 Efabless Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// This include is relative to $CARAVEL_PATH (see Makefile)
+#include <defs.h>
+#include <stub.c>
+
+/*
+	IO Test:
+		- Configures MPRJ lower 8-IO pins as outputs
+		- Observes counter value through the MPRJ lower 8 IO pins (in the testbench)
+*/
+
+void main()
+{
+	/* 
+	IO Control Registers
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 3-bits | 1-bit | 1-bit | 1-bit  | 1-bit  | 1-bit | 1-bit   | 1-bit   | 1-bit | 1-bit | 1-bit   |
+
+	Output: 0000_0110_0000_1110  (0x1808) = GPIO_MODE_MGMT_STD_BIDIRECTIONAL
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 110    | 0     | 0     | 0      | 0      | 0     | 0       | 1       | 0     | 0     | 0       |
+	
+	 
+	Input: 0000_0001_0000_1111 (0x0402) = GPIO_MODE_USER_STD_INPUT_NOPULL
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 001    | 0     | 0     | 0      | 0      | 0     | 0       | 0       | 0     | 1     | 0       |
+
+	*/
+
+	/* Set up the housekeeping SPI to be connected internally so	*/
+	/* that external pin changes don't affect it.			*/
+
+	// reg_spi_enable = 1;
+	// reg_spimaster_cs = 0x10001;
+	// reg_spimaster_control = 0x0801;
+
+	// reg_spimaster_control = 0xa002;	// Enable, prescaler = 2,
+                                        // connect to housekeeping SPI
+
+	// Connect the housekeeping SPI to the SPI master
+	// so that the CSB line is not left floating.  This allows
+	// all of the GPIO pins to be used for user functions.
+
+	// Configure lower 8-IOs as user output
+	// Observe counter value in the testbench
+	reg_mprj_io_0 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_1 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_2 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_3 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_4 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_5 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_6 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_7 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+
+	/* Apply configuration */
+	reg_mprj_xfer = 1;
+	while (reg_mprj_xfer == 1);
+}
+
diff --git a/verilog/dv/io_ports_bid/io_ports_bid_tb.v b/verilog/dv/io_ports_bid/io_ports_bid_tb.v
new file mode 100644
index 0000000..af9e9d2
--- /dev/null
+++ b/verilog/dv/io_ports_bid/io_ports_bid_tb.v
@@ -0,0 +1,266 @@
+// SPDX-FileCopyrightText: 2020 Efabless Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
+
+`default_nettype none
+
+`timescale 1 ns / 1 ps
+
+module io_ports_bid_tb;
+	reg clock;
+	reg RSTB;
+	reg CSB;
+	reg power1, power2;
+	reg power3, power4;
+
+	wire gpio;
+	wire [37:0] mprj_io;
+	wire [7:0] mprj_io_0;
+
+	assign mprj_io_0 = mprj_io[7:0];
+	// assign mprj_io_0 = {mprj_io[8:4],mprj_io[2:0]};
+
+	assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
+	// assign mprj_io[3] = 1'b1;
+
+	// External clock is used by default.  Make this artificially fast for the
+	// simulation.  Normally this would be a slow clock and the digital PLL
+	// would be the fast clock.
+
+	always #12.5 clock <= (clock === 1'b0);
+
+	initial begin
+		clock = 0;
+	end
+
+
+	`ifdef ENABLE_SDF
+		initial begin
+			$sdf_annotate("../../../sdf/user_proj_example.sdf", uut.mprj) ;
+			$sdf_annotate("../../../sdf/user_project_wrapper.sdf", uut.mprj.mprj) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/DFFRAM.sdf", uut.soc.DFFRAM_0) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/mgmt_core.sdf", uut.soc.core) ;
+			$sdf_annotate("../../../caravel/sdf/housekeeping.sdf", uut.housekeeping) ;
+			$sdf_annotate("../../../caravel/sdf/chip_io.sdf", uut.padframe) ;
+			$sdf_annotate("../../../caravel/sdf/mprj_logic_high.sdf", uut.mgmt_buffers.mprj_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mprj2_logic_high.sdf", uut.mgmt_buffers.mprj2_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect_hv.sdf", uut.mgmt_buffers.powergood_check) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect.sdf", uut.mgmt_buffers) ;
+			$sdf_annotate("../../../caravel/sdf/caravel_clocking.sdf", uut.clocking) ;
+			$sdf_annotate("../../../caravel/sdf/digital_pll.sdf", uut.pll) ;
+			$sdf_annotate("../../../caravel/sdf/xres_buf.sdf", uut.rstb_level) ;
+			$sdf_annotate("../../../caravel/sdf/user_id_programming.sdf", uut.user_id_value) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[11] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[12] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[13] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[14] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[15] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_0) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_1) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_2) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_3) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_4) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_5) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_6) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_7) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_8) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_9) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_10) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_11) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_12) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_13) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_14) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_15) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_16) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_17) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_18) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_19) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_20) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_21) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_22) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_23) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_24) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_25) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_26) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_27) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_28) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_29) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_30) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_31) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_32) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_33) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_34) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_35) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_36) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_37) ;
+		end
+	`endif 
+
+	initial begin
+		$dumpfile("io_ports_bid.vcd");
+		$dumpvars(0, io_ports_bid_tb);
+
+		// Repeat cycles of 1000 clock edges as needed to complete testbench
+		repeat (25) begin
+			repeat (1000) @(posedge clock);
+			// $display("+1000 cycles");
+		end
+		$display("%c[1;31m",27);
+		`ifdef GL
+			$display ("Monitor: Timeout, Test Mega-Project IO Ports (GL) Failed");
+		`else
+			$display ("Monitor: Timeout, Test Mega-Project IO Ports (RTL) Failed");
+		`endif
+		$display("%c[0m",27);
+		$finish;
+	end
+
+	initial begin
+	    // Observe Output pins [7:0]
+		wait(mprj_io_0 == 8'h01);
+		wait(mprj_io_0 == 8'h02);
+		wait(mprj_io_0 == 8'h03);
+		wait(mprj_io_0 == 8'h04);
+		wait(mprj_io_0 == 8'h05);
+		wait(mprj_io_0 == 8'h06);
+		wait(mprj_io_0 == 8'h07);
+		wait(mprj_io_0 == 8'h08);
+		wait(mprj_io_0 == 8'h09);
+		wait(mprj_io_0 == 8'h0A);   
+		wait(mprj_io_0 == 8'hFF);
+		wait(mprj_io_0 == 8'h00);
+		
+		`ifdef GL
+	    	$display("Monitor: Test 1 Mega-Project IO (GL) Passed");
+		`else
+		    $display("Monitor: Test 1 Mega-Project IO (RTL) Passed");
+		`endif
+	    $finish;
+	end
+
+	initial begin
+		RSTB <= 1'b0;
+		CSB  <= 1'b1;		// Force CSB high
+		#2000;
+		RSTB <= 1'b1;	    	// Release reset
+		#3_00_000;
+		CSB = 1'b0;		// CSB can be released
+	end
+
+	initial begin		// Power-up sequence
+		power1 <= 1'b0;
+		power2 <= 1'b0;
+		power3 <= 1'b0;
+		power4 <= 1'b0;
+		#100;
+		power1 <= 1'b1;
+		#100;
+		power2 <= 1'b1;
+		#100;
+		power3 <= 1'b1;
+		#100;
+		power4 <= 1'b1;
+	end
+
+	always @(mprj_io) begin
+		#1 $display("MPRJ-IO state = %b ", mprj_io[7:0]);
+	end
+
+	wire flash_csb;
+	wire flash_clk;
+	wire flash_io0;
+	wire flash_io1;
+
+	wire VDD3V3;
+	wire VDD1V8;
+	wire VSS;
+	
+	assign VDD3V3 = power1;
+	assign VDD1V8 = power2;
+	assign VSS = 1'b0;
+
+	caravel uut (
+		.vddio	  (VDD3V3),
+		.vddio_2  (VDD3V3),
+		.vssio	  (VSS),
+		.vssio_2  (VSS),
+		.vdda	  (VDD3V3),
+		.vssa	  (VSS),
+		.vccd	  (VDD1V8),
+		.vssd	  (VSS),
+		.vdda1    (VDD3V3),
+		.vdda1_2  (VDD3V3),
+		.vdda2    (VDD3V3),
+		.vssa1	  (VSS),
+		.vssa1_2  (VSS),
+		.vssa2	  (VSS),
+		.vccd1	  (VDD1V8),
+		.vccd2	  (VDD1V8),
+		.vssd1	  (VSS),
+		.vssd2	  (VSS),
+		.clock    (clock),
+		.gpio     (gpio),
+		.mprj_io  (mprj_io),
+		.flash_csb(flash_csb),
+		.flash_clk(flash_clk),
+		.flash_io0(flash_io0),
+		.flash_io1(flash_io1),
+		.resetb	  (RSTB)
+	);
+
+	spiflash #(
+		.FILENAME("io_ports_bid.hex")
+	) spiflash (
+		.csb(flash_csb),
+		.clk(flash_clk),
+		.io0(flash_io0),
+		.io1(flash_io1),
+		.io2(),			// not used
+		.io3()			// not used
+	);
+
+endmodule
+`default_nettype wire
diff --git a/verilog/dv/io_ports_bid_gpio/Makefile b/verilog/dv/io_ports_bid_gpio/Makefile
new file mode 100644
index 0000000..3fd0b56
--- /dev/null
+++ b/verilog/dv/io_ports_bid_gpio/Makefile
@@ -0,0 +1,32 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+
+ 
+PWDD := $(shell pwd)
+BLOCKS := $(shell basename $(PWDD))
+
+# ---- Include Partitioned Makefiles ----
+
+CONFIG = caravel_user_project
+
+
+include $(MCW_ROOT)/verilog/dv/make/env.makefile
+include $(MCW_ROOT)/verilog/dv/make/var.makefile
+include $(MCW_ROOT)/verilog/dv/make/cpu.makefile
+include $(MCW_ROOT)/verilog/dv/make/sim.makefile
+
+
diff --git a/verilog/dv/io_ports_bid_gpio/io_ports_bid_gpio.c b/verilog/dv/io_ports_bid_gpio/io_ports_bid_gpio.c
new file mode 100644
index 0000000..4405eec
--- /dev/null
+++ b/verilog/dv/io_ports_bid_gpio/io_ports_bid_gpio.c
@@ -0,0 +1,75 @@
+/*
+ * SPDX-FileCopyrightText: 2020 Efabless Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// This include is relative to $CARAVEL_PATH (see Makefile)
+#include <defs.h>
+#include <stub.c>
+
+/*
+	IO Test:
+		- Configures MPRJ lower 8-IO pins as outputs
+		- Observes counter value through the MPRJ lower 8 IO pins (in the testbench)
+*/
+
+void main()
+{
+	/* 
+	IO Control Registers
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 3-bits | 1-bit | 1-bit | 1-bit  | 1-bit  | 1-bit | 1-bit   | 1-bit   | 1-bit | 1-bit | 1-bit   |
+
+	Output: 0000_0110_0000_1110  (0x1808) = GPIO_MODE_MGMT_STD_BIDIRECTIONAL
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 110    | 0     | 0     | 0      | 0      | 0     | 0       | 1       | 0     | 0     | 0       |
+	
+	 
+	Input: 0000_0001_0000_1111 (0x0402) = GPIO_MODE_USER_STD_INPUT_NOPULL
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 001    | 0     | 0     | 0      | 0      | 0     | 0       | 0       | 0     | 1     | 0       |
+
+	*/
+
+	/* Set up the housekeeping SPI to be connected internally so	*/
+	/* that external pin changes don't affect it.			*/
+
+	// reg_spi_enable = 1;
+	// reg_spimaster_cs = 0x10001;
+	// reg_spimaster_control = 0x0801;
+
+	// reg_spimaster_control = 0xa002;	// Enable, prescaler = 2,
+                                        // connect to housekeeping SPI
+
+	// Connect the housekeeping SPI to the SPI master
+	// so that the CSB line is not left floating.  This allows
+	// all of the GPIO pins to be used for user functions.
+
+	// Configure lower 8-IOs as user output
+	// Observe counter value in the testbench
+	reg_mprj_io_0 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_1 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_2 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_3 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_4 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_5 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_6 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_7 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+
+	/* Apply configuration */
+	reg_mprj_xfer = 1;
+	while (reg_mprj_xfer == 1);
+}
+
diff --git a/verilog/dv/io_ports_bid_gpio/io_ports_bid_gpio_tb.v b/verilog/dv/io_ports_bid_gpio/io_ports_bid_gpio_tb.v
new file mode 100644
index 0000000..4cabc27
--- /dev/null
+++ b/verilog/dv/io_ports_bid_gpio/io_ports_bid_gpio_tb.v
@@ -0,0 +1,266 @@
+// SPDX-FileCopyrightText: 2020 Efabless Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
+
+`default_nettype none
+
+`timescale 1 ns / 1 ps
+
+module io_ports_bid_gpio_tb;
+	reg clock;
+	reg RSTB;
+	reg CSB;
+	reg power1, power2;
+	reg power3, power4;
+
+	wire gpio;
+	wire [37:0] mprj_io;
+	wire [7:0] mprj_io_0;
+
+	assign mprj_io_0 = mprj_io[7:0];
+	// assign mprj_io_0 = {mprj_io[8:4],mprj_io[2:0]};
+
+	assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
+	// assign mprj_io[3] = 1'b1;
+
+	// External clock is used by default.  Make this artificially fast for the
+	// simulation.  Normally this would be a slow clock and the digital PLL
+	// would be the fast clock.
+
+	always #12.5 clock <= (clock === 1'b0);
+
+	initial begin
+		clock = 0;
+	end
+
+
+	`ifdef ENABLE_SDF
+		initial begin
+			//$sdf_annotate("../../../sdf/user_proj_example.sdf", uut.mprj) ;
+			//$sdf_annotate("../../../sdf/user_project_wrapper.sdf", uut.mprj.mprj) ;
+			//$sdf_annotate("../../../mgmt_core_wrapper/sdf/DFFRAM.sdf", uut.soc.DFFRAM_0) ;
+			//$sdf_annotate("../../../mgmt_core_wrapper/sdf/mgmt_core.sdf", uut.soc.core) ;
+			//$sdf_annotate("../../../caravel/sdf/housekeeping.sdf", uut.housekeeping) ;
+			//$sdf_annotate("../../../caravel/sdf/chip_io.sdf", uut.padframe) ;
+			//$sdf_annotate("../../../caravel/sdf/mprj_logic_high.sdf", uut.mgmt_buffers.mprj_logic_high_inst) ;
+			//$sdf_annotate("../../../caravel/sdf/mprj2_logic_high.sdf", uut.mgmt_buffers.mprj2_logic_high_inst) ;
+			//$sdf_annotate("../../../caravel/sdf/mgmt_protect_hv.sdf", uut.mgmt_buffers.powergood_check) ;
+			//$sdf_annotate("../../../caravel/sdf/mgmt_protect.sdf", uut.mgmt_buffers) ;
+			//$sdf_annotate("../../../caravel/sdf/caravel_clocking.sdf", uut.clocking) ;
+			//$sdf_annotate("../../../caravel/sdf/digital_pll.sdf", uut.pll) ;
+			//$sdf_annotate("../../../caravel/sdf/xres_buf.sdf", uut.rstb_level) ;
+			//$sdf_annotate("../../../caravel/sdf/user_id_programming.sdf", uut.user_id_value) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[11] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[12] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[13] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[14] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[15] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_0) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_1) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_2) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_3) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_4) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_5) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_6) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_7) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_8) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_9) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_10) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_11) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_12) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_13) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_14) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_15) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_16) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_17) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_18) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_19) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_20) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_21) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_22) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_23) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_24) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_25) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_26) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_27) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_28) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_29) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_30) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_31) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_32) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_33) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_34) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_35) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_36) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_37) ;
+		end
+	`endif 
+
+	initial begin
+		$dumpfile("io_ports_bid_gpio.vcd");
+		$dumpvars(0, io_ports_bid_gpio_tb);
+
+		// Repeat cycles of 1000 clock edges as needed to complete testbench
+		repeat (15) begin
+			repeat (1000) @(posedge clock);
+			// $display("+1000 cycles");
+		end
+		$display("%c[1;31m",27);
+		`ifdef GL
+			$display ("Monitor: Timeout, Test Mega-Project IO Ports (GL) Failed");
+		`else
+			$display ("Monitor: Timeout, Test Mega-Project IO Ports (RTL) Failed");
+		`endif
+		$display("%c[0m",27);
+		$finish;
+	end
+
+	initial begin
+	    // Observe Output pins [7:0]
+		wait(mprj_io_0 == 8'h01);
+		wait(mprj_io_0 == 8'h02);
+		wait(mprj_io_0 == 8'h03);
+		wait(mprj_io_0 == 8'h04);
+		wait(mprj_io_0 == 8'h05);
+		wait(mprj_io_0 == 8'h06);
+		wait(mprj_io_0 == 8'h07);
+		wait(mprj_io_0 == 8'h08);
+		wait(mprj_io_0 == 8'h09);
+		wait(mprj_io_0 == 8'h0A);   
+		wait(mprj_io_0 == 8'hFF);
+		wait(mprj_io_0 == 8'h00);
+		
+		`ifdef GL
+	    	$display("Monitor: Test 1 Mega-Project IO (GL) Passed");
+		`else
+		    $display("Monitor: Test 1 Mega-Project IO (RTL) Passed");
+		`endif
+	    $finish;
+	end
+
+	initial begin
+		RSTB <= 1'b0;
+		CSB  <= 1'b1;		// Force CSB high
+		#2000;
+		RSTB <= 1'b1;	    	// Release reset
+		#3_00_000;
+		CSB = 1'b0;		// CSB can be released
+	end
+
+	initial begin		// Power-up sequence
+		power1 <= 1'b0;
+		power2 <= 1'b0;
+		power3 <= 1'b0;
+		power4 <= 1'b0;
+		#100;
+		power1 <= 1'b1;
+		#100;
+		power2 <= 1'b1;
+		#100;
+		power3 <= 1'b1;
+		#100;
+		power4 <= 1'b1;
+	end
+
+	always @(mprj_io) begin
+		#1 $display("MPRJ-IO state = %b ", mprj_io[7:0]);
+	end
+
+	wire flash_csb;
+	wire flash_clk;
+	wire flash_io0;
+	wire flash_io1;
+
+	wire VDD3V3;
+	wire VDD1V8;
+	wire VSS;
+	
+	assign VDD3V3 = power1;
+	assign VDD1V8 = power2;
+	assign VSS = 1'b0;
+
+	caravel uut (
+		.vddio	  (VDD3V3),
+		.vddio_2  (VDD3V3),
+		.vssio	  (VSS),
+		.vssio_2  (VSS),
+		.vdda	  (VDD3V3),
+		.vssa	  (VSS),
+		.vccd	  (VDD1V8),
+		.vssd	  (VSS),
+		.vdda1    (VDD3V3),
+		.vdda1_2  (VDD3V3),
+		.vdda2    (VDD3V3),
+		.vssa1	  (VSS),
+		.vssa1_2  (VSS),
+		.vssa2	  (VSS),
+		.vccd1	  (VDD1V8),
+		.vccd2	  (VDD1V8),
+		.vssd1	  (VSS),
+		.vssd2	  (VSS),
+		.clock    (clock),
+		.gpio     (gpio),
+		.mprj_io  (mprj_io),
+		.flash_csb(flash_csb),
+		.flash_clk(flash_clk),
+		.flash_io0(flash_io0),
+		.flash_io1(flash_io1),
+		.resetb	  (RSTB)
+	);
+
+	spiflash #(
+		.FILENAME("io_ports_bid_gpio.hex")
+	) spiflash (
+		.csb(flash_csb),
+		.clk(flash_clk),
+		.io0(flash_io0),
+		.io1(flash_io1),
+		.io2(),			// not used
+		.io3()			// not used
+	);
+
+endmodule
+`default_nettype wire
diff --git a/verilog/dv/io_ports_bid_nosdf/Makefile b/verilog/dv/io_ports_bid_nosdf/Makefile
new file mode 100644
index 0000000..3fd0b56
--- /dev/null
+++ b/verilog/dv/io_ports_bid_nosdf/Makefile
@@ -0,0 +1,32 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+
+ 
+PWDD := $(shell pwd)
+BLOCKS := $(shell basename $(PWDD))
+
+# ---- Include Partitioned Makefiles ----
+
+CONFIG = caravel_user_project
+
+
+include $(MCW_ROOT)/verilog/dv/make/env.makefile
+include $(MCW_ROOT)/verilog/dv/make/var.makefile
+include $(MCW_ROOT)/verilog/dv/make/cpu.makefile
+include $(MCW_ROOT)/verilog/dv/make/sim.makefile
+
+
diff --git a/verilog/dv/io_ports_bid_nosdf/io_ports_bid_nosdf.c b/verilog/dv/io_ports_bid_nosdf/io_ports_bid_nosdf.c
new file mode 100644
index 0000000..4405eec
--- /dev/null
+++ b/verilog/dv/io_ports_bid_nosdf/io_ports_bid_nosdf.c
@@ -0,0 +1,75 @@
+/*
+ * SPDX-FileCopyrightText: 2020 Efabless Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// This include is relative to $CARAVEL_PATH (see Makefile)
+#include <defs.h>
+#include <stub.c>
+
+/*
+	IO Test:
+		- Configures MPRJ lower 8-IO pins as outputs
+		- Observes counter value through the MPRJ lower 8 IO pins (in the testbench)
+*/
+
+void main()
+{
+	/* 
+	IO Control Registers
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 3-bits | 1-bit | 1-bit | 1-bit  | 1-bit  | 1-bit | 1-bit   | 1-bit   | 1-bit | 1-bit | 1-bit   |
+
+	Output: 0000_0110_0000_1110  (0x1808) = GPIO_MODE_MGMT_STD_BIDIRECTIONAL
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 110    | 0     | 0     | 0      | 0      | 0     | 0       | 1       | 0     | 0     | 0       |
+	
+	 
+	Input: 0000_0001_0000_1111 (0x0402) = GPIO_MODE_USER_STD_INPUT_NOPULL
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 001    | 0     | 0     | 0      | 0      | 0     | 0       | 0       | 0     | 1     | 0       |
+
+	*/
+
+	/* Set up the housekeeping SPI to be connected internally so	*/
+	/* that external pin changes don't affect it.			*/
+
+	// reg_spi_enable = 1;
+	// reg_spimaster_cs = 0x10001;
+	// reg_spimaster_control = 0x0801;
+
+	// reg_spimaster_control = 0xa002;	// Enable, prescaler = 2,
+                                        // connect to housekeeping SPI
+
+	// Connect the housekeeping SPI to the SPI master
+	// so that the CSB line is not left floating.  This allows
+	// all of the GPIO pins to be used for user functions.
+
+	// Configure lower 8-IOs as user output
+	// Observe counter value in the testbench
+	reg_mprj_io_0 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_1 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_2 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_3 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_4 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_5 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_6 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+	reg_mprj_io_7 =  GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+
+	/* Apply configuration */
+	reg_mprj_xfer = 1;
+	while (reg_mprj_xfer == 1);
+}
+
diff --git a/verilog/dv/io_ports_bid_nosdf/io_ports_bid_nosdf_tb.v b/verilog/dv/io_ports_bid_nosdf/io_ports_bid_nosdf_tb.v
new file mode 100644
index 0000000..3517854
--- /dev/null
+++ b/verilog/dv/io_ports_bid_nosdf/io_ports_bid_nosdf_tb.v
@@ -0,0 +1,266 @@
+// SPDX-FileCopyrightText: 2020 Efabless Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
+
+`default_nettype none
+
+`timescale 1 ns / 1 ps
+
+module io_ports_bid_nosdf_tb;
+	reg clock;
+	reg RSTB;
+	reg CSB;
+	reg power1, power2;
+	reg power3, power4;
+
+	wire gpio;
+	wire [37:0] mprj_io;
+	wire [7:0] mprj_io_0;
+
+	assign mprj_io_0 = mprj_io[7:0];
+	// assign mprj_io_0 = {mprj_io[8:4],mprj_io[2:0]};
+
+	assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
+	// assign mprj_io[3] = 1'b1;
+
+	// External clock is used by default.  Make this artificially fast for the
+	// simulation.  Normally this would be a slow clock and the digital PLL
+	// would be the fast clock.
+
+	always #12.5 clock <= (clock === 1'b0);
+
+	initial begin
+		clock = 0;
+	end
+
+
+	`ifdef ENABLE_SDF
+		initial begin
+			//$sdf_annotate("../../../sdf/user_proj_example.sdf", uut.mprj) ;
+			//$sdf_annotate("../../../sdf/user_project_wrapper.sdf", uut.mprj.mprj) ;
+			//$sdf_annotate("../../../mgmt_core_wrapper/sdf/DFFRAM.sdf", uut.soc.DFFRAM_0) ;
+			//$sdf_annotate("../../../mgmt_core_wrapper/sdf/mgmt_core.sdf", uut.soc.core) ;
+			//$sdf_annotate("../../../caravel/sdf/housekeeping.sdf", uut.housekeeping) ;
+			//$sdf_annotate("../../../caravel/sdf/chip_io.sdf", uut.padframe) ;
+			//$sdf_annotate("../../../caravel/sdf/mprj_logic_high.sdf", uut.mgmt_buffers.mprj_logic_high_inst) ;
+			//$sdf_annotate("../../../caravel/sdf/mprj2_logic_high.sdf", uut.mgmt_buffers.mprj2_logic_high_inst) ;
+			//$sdf_annotate("../../../caravel/sdf/mgmt_protect_hv.sdf", uut.mgmt_buffers.powergood_check) ;
+			//$sdf_annotate("../../../caravel/sdf/mgmt_protect.sdf", uut.mgmt_buffers) ;
+			//$sdf_annotate("../../../caravel/sdf/caravel_clocking.sdf", uut.clocking) ;
+			//$sdf_annotate("../../../caravel/sdf/digital_pll.sdf", uut.pll) ;
+			//$sdf_annotate("../../../caravel/sdf/xres_buf.sdf", uut.rstb_level) ;
+			//$sdf_annotate("../../../caravel/sdf/user_id_programming.sdf", uut.user_id_value) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[0] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[1] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[1] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[2] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[0] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[1] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[2] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[3] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[4] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[5] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[6] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[7] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[8] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[9] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[10] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[0] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[1] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[2] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[3] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[4] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[5] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[0] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[1] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[2] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[3] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[4] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[5] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[6] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[7] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[8] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[9] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[10] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[11] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[12] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[13] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[14] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[15] ) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_0) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_1) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_2) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_3) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_4) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_5) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_6) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_7) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_8) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_9) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_10) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_11) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_12) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_13) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_14) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_15) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_16) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_17) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_18) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_19) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_20) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_21) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_22) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_23) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_24) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_25) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_26) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_27) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_28) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_29) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_30) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_31) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_32) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_33) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_34) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_35) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_36) ;
+			//$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_37) ;
+		end
+	`endif
+
+	initial begin
+		$dumpfile("io_ports_bid_nosdf.vcd");
+		$dumpvars(0, io_ports_bid_nosdf_tb);
+
+		// Repeat cycles of 1000 clock edges as needed to complete testbench
+		repeat (15) begin
+			repeat (1000) @(posedge clock);
+			// $display("+1000 cycles");
+		end
+		$display("%c[1;31m",27);
+		`ifdef GL
+			$display ("Monitor: Timeout, Test Mega-Project IO Ports (GL) Failed");
+		`else
+			$display ("Monitor: Timeout, Test Mega-Project IO Ports (RTL) Failed");
+		`endif
+		$display("%c[0m",27);
+		$finish;
+	end
+
+	initial begin
+	    // Observe Output pins [7:0]
+		wait(mprj_io_0 == 8'h01);
+		wait(mprj_io_0 == 8'h02);
+		wait(mprj_io_0 == 8'h03);
+		wait(mprj_io_0 == 8'h04);
+		wait(mprj_io_0 == 8'h05);
+		wait(mprj_io_0 == 8'h06);
+		wait(mprj_io_0 == 8'h07);
+		wait(mprj_io_0 == 8'h08);
+		wait(mprj_io_0 == 8'h09);
+		wait(mprj_io_0 == 8'h0A);   
+		wait(mprj_io_0 == 8'hFF);
+		wait(mprj_io_0 == 8'h00);
+		
+		`ifdef GL
+	    	$display("Monitor: Test 1 Mega-Project IO (GL) Passed");
+		`else
+		    $display("Monitor: Test 1 Mega-Project IO (RTL) Passed");
+		`endif
+	    $finish;
+	end
+
+	initial begin
+		RSTB <= 1'b0;
+		CSB  <= 1'b1;		// Force CSB high
+		#2000;
+		RSTB <= 1'b1;	    	// Release reset
+		#3_00_000;
+		CSB = 1'b0;		// CSB can be released
+	end
+
+	initial begin		// Power-up sequence
+		power1 <= 1'b0;
+		power2 <= 1'b0;
+		power3 <= 1'b0;
+		power4 <= 1'b0;
+		#100;
+		power1 <= 1'b1;
+		#100;
+		power2 <= 1'b1;
+		#100;
+		power3 <= 1'b1;
+		#100;
+		power4 <= 1'b1;
+	end
+
+	always @(mprj_io) begin
+		#1 $display("MPRJ-IO state = %b ", mprj_io[7:0]);
+	end
+
+	wire flash_csb;
+	wire flash_clk;
+	wire flash_io0;
+	wire flash_io1;
+
+	wire VDD3V3;
+	wire VDD1V8;
+	wire VSS;
+	
+	assign VDD3V3 = power1;
+	assign VDD1V8 = power2;
+	assign VSS = 1'b0;
+
+	caravel uut (
+		.vddio	  (VDD3V3),
+		.vddio_2  (VDD3V3),
+		.vssio	  (VSS),
+		.vssio_2  (VSS),
+		.vdda	  (VDD3V3),
+		.vssa	  (VSS),
+		.vccd	  (VDD1V8),
+		.vssd	  (VSS),
+		.vdda1    (VDD3V3),
+		.vdda1_2  (VDD3V3),
+		.vdda2    (VDD3V3),
+		.vssa1	  (VSS),
+		.vssa1_2  (VSS),
+		.vssa2	  (VSS),
+		.vccd1	  (VDD1V8),
+		.vccd2	  (VDD1V8),
+		.vssd1	  (VSS),
+		.vssd2	  (VSS),
+		.clock    (clock),
+		.gpio     (gpio),
+		.mprj_io  (mprj_io),
+		.flash_csb(flash_csb),
+		.flash_clk(flash_clk),
+		.flash_io0(flash_io0),
+		.flash_io1(flash_io1),
+		.resetb	  (RSTB)
+	);
+
+	spiflash #(
+		.FILENAME("io_ports_bid_nosdf.hex")
+	) spiflash (
+		.csb(flash_csb),
+		.clk(flash_clk),
+		.io0(flash_io0),
+		.io1(flash_io1),
+		.io2(),			// not used
+		.io3()			// not used
+	);
+
+endmodule
+`default_nettype wire
diff --git a/verilog/dv/io_ports_nopull/Makefile b/verilog/dv/io_ports_nopull/Makefile
new file mode 100644
index 0000000..3fd0b56
--- /dev/null
+++ b/verilog/dv/io_ports_nopull/Makefile
@@ -0,0 +1,32 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+
+ 
+PWDD := $(shell pwd)
+BLOCKS := $(shell basename $(PWDD))
+
+# ---- Include Partitioned Makefiles ----
+
+CONFIG = caravel_user_project
+
+
+include $(MCW_ROOT)/verilog/dv/make/env.makefile
+include $(MCW_ROOT)/verilog/dv/make/var.makefile
+include $(MCW_ROOT)/verilog/dv/make/cpu.makefile
+include $(MCW_ROOT)/verilog/dv/make/sim.makefile
+
+
diff --git a/verilog/dv/io_ports_nopull/io_ports_nopull.c b/verilog/dv/io_ports_nopull/io_ports_nopull.c
new file mode 100644
index 0000000..fdf2898
--- /dev/null
+++ b/verilog/dv/io_ports_nopull/io_ports_nopull.c
@@ -0,0 +1,75 @@
+/*
+ * SPDX-FileCopyrightText: 2020 Efabless Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// This include is relative to $CARAVEL_PATH (see Makefile)
+#include <defs.h>
+#include <stub.c>
+
+/*
+	IO Test:
+		- Configures MPRJ lower 8-IO pins as outputs
+		- Observes counter value through the MPRJ lower 8 IO pins (in the testbench)
+*/
+
+void main()
+{
+	/* 
+	IO Control Registers
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 3-bits | 1-bit | 1-bit | 1-bit  | 1-bit  | 1-bit | 1-bit   | 1-bit   | 1-bit | 1-bit | 1-bit   |
+
+	Output: 0000_0110_0000_1110  (0x1808) = GPIO_MODE_MGMT_STD_INPUT_NOPULL
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 110    | 0     | 0     | 0      | 0      | 0     | 0       | 1       | 0     | 0     | 0       |
+	
+	 
+	Input: 0000_0001_0000_1111 (0x0402) = GPIO_MODE_USER_STD_INPUT_NOPULL
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 001    | 0     | 0     | 0      | 0      | 0     | 0       | 0       | 0     | 1     | 0       |
+
+	*/
+
+	/* Set up the housekeeping SPI to be connected internally so	*/
+	/* that external pin changes don't affect it.			*/
+
+	// reg_spi_enable = 1;
+	// reg_spimaster_cs = 0x10001;
+	// reg_spimaster_control = 0x0801;
+
+	// reg_spimaster_control = 0xa002;	// Enable, prescaler = 2,
+                                        // connect to housekeeping SPI
+
+	// Connect the housekeeping SPI to the SPI master
+	// so that the CSB line is not left floating.  This allows
+	// all of the GPIO pins to be used for user functions.
+
+	// Configure lower 8-IOs as user output
+	// Observe counter value in the testbench
+	reg_mprj_io_0 =  GPIO_MODE_MGMT_STD_INPUT_NOPULL;
+	reg_mprj_io_1 =  GPIO_MODE_MGMT_STD_INPUT_NOPULL;
+	reg_mprj_io_2 =  GPIO_MODE_MGMT_STD_INPUT_NOPULL;
+	reg_mprj_io_3 =  GPIO_MODE_MGMT_STD_INPUT_NOPULL;
+	reg_mprj_io_4 =  GPIO_MODE_MGMT_STD_INPUT_NOPULL;
+	reg_mprj_io_5 =  GPIO_MODE_MGMT_STD_INPUT_NOPULL;
+	reg_mprj_io_6 =  GPIO_MODE_MGMT_STD_INPUT_NOPULL;
+	reg_mprj_io_7 =  GPIO_MODE_MGMT_STD_INPUT_NOPULL;
+
+	/* Apply configuration */
+	reg_mprj_xfer = 1;
+	while (reg_mprj_xfer == 1);
+}
+
diff --git a/verilog/dv/io_ports_nopull/io_ports_nopull_tb.v b/verilog/dv/io_ports_nopull/io_ports_nopull_tb.v
new file mode 100644
index 0000000..f0b08df
--- /dev/null
+++ b/verilog/dv/io_ports_nopull/io_ports_nopull_tb.v
@@ -0,0 +1,266 @@
+// SPDX-FileCopyrightText: 2020 Efabless Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
+
+`default_nettype none
+
+`timescale 1 ns / 1 ps
+
+module io_ports_nopull_tb;
+	reg clock;
+	reg RSTB;
+	reg CSB;
+	reg power1, power2;
+	reg power3, power4;
+
+	wire gpio;
+	wire [37:0] mprj_io;
+	wire [7:0] mprj_io_0;
+
+	assign mprj_io_0 = mprj_io[7:0];
+	// assign mprj_io_0 = {mprj_io[8:4],mprj_io[2:0]};
+
+	assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
+	// assign mprj_io[3] = 1'b1;
+
+	// External clock is used by default.  Make this artificially fast for the
+	// simulation.  Normally this would be a slow clock and the digital PLL
+	// would be the fast clock.
+
+	always #12.5 clock <= (clock === 1'b0);
+
+	initial begin
+		clock = 0;
+	end
+
+
+	`ifdef ENABLE_SDF
+		initial begin
+			$sdf_annotate("../../../sdf/user_proj_example.sdf", uut.mprj) ;
+			$sdf_annotate("../../../sdf/user_project_wrapper.sdf", uut.mprj.mprj) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/DFFRAM.sdf", uut.soc.DFFRAM_0) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/mgmt_core.sdf", uut.soc.core) ;
+			$sdf_annotate("../../../caravel/sdf/housekeeping.sdf", uut.housekeeping) ;
+			$sdf_annotate("../../../caravel/sdf/chip_io.sdf", uut.padframe) ;
+			$sdf_annotate("../../../caravel/sdf/mprj_logic_high.sdf", uut.mgmt_buffers.mprj_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mprj2_logic_high.sdf", uut.mgmt_buffers.mprj2_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect_hv.sdf", uut.mgmt_buffers.powergood_check) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect.sdf", uut.mgmt_buffers) ;
+			$sdf_annotate("../../../caravel/sdf/caravel_clocking.sdf", uut.clocking) ;
+			$sdf_annotate("../../../caravel/sdf/digital_pll.sdf", uut.pll) ;
+			$sdf_annotate("../../../caravel/sdf/xres_buf.sdf", uut.rstb_level) ;
+			$sdf_annotate("../../../caravel/sdf/user_id_programming.sdf", uut.user_id_value) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[11] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[12] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[13] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[14] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[15] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_0) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_1) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_2) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_3) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_4) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_5) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_6) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_7) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_8) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_9) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_10) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_11) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_12) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_13) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_14) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_15) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_16) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_17) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_18) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_19) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_20) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_21) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_22) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_23) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_24) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_25) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_26) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_27) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_28) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_29) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_30) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_31) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_32) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_33) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_34) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_35) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_36) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_37) ;
+		end
+	`endif 
+
+	initial begin
+		$dumpfile("io_ports_nopull.vcd");
+		$dumpvars(0, io_ports_nopull_tb);
+
+		// Repeat cycles of 1000 clock edges as needed to complete testbench
+		repeat (25) begin
+			repeat (1000) @(posedge clock);
+			// $display("+1000 cycles");
+		end
+		$display("%c[1;31m",27);
+		`ifdef GL
+			$display ("Monitor: Timeout, Test Mega-Project IO Ports (GL) Failed");
+		`else
+			$display ("Monitor: Timeout, Test Mega-Project IO Ports (RTL) Failed");
+		`endif
+		$display("%c[0m",27);
+		$finish;
+	end
+
+	initial begin
+	    // Observe Output pins [7:0]
+		wait(mprj_io_0 == 8'h01);
+		wait(mprj_io_0 == 8'h02);
+		wait(mprj_io_0 == 8'h03);
+		wait(mprj_io_0 == 8'h04);
+		wait(mprj_io_0 == 8'h05);
+		wait(mprj_io_0 == 8'h06);
+		wait(mprj_io_0 == 8'h07);
+		wait(mprj_io_0 == 8'h08);
+		wait(mprj_io_0 == 8'h09);
+		wait(mprj_io_0 == 8'h0A);   
+		wait(mprj_io_0 == 8'hFF);
+		wait(mprj_io_0 == 8'h00);
+		
+		`ifdef GL
+	    	$display("Monitor: Test 1 Mega-Project IO (GL) Passed");
+		`else
+		    $display("Monitor: Test 1 Mega-Project IO (RTL) Passed");
+		`endif
+	    $finish;
+	end
+
+	initial begin
+		RSTB <= 1'b0;
+		CSB  <= 1'b1;		// Force CSB high
+		#2000;
+		RSTB <= 1'b1;	    	// Release reset
+		#3_00_000;
+		CSB = 1'b0;		// CSB can be released
+	end
+
+	initial begin		// Power-up sequence
+		power1 <= 1'b0;
+		power2 <= 1'b0;
+		power3 <= 1'b0;
+		power4 <= 1'b0;
+		#100;
+		power1 <= 1'b1;
+		#100;
+		power2 <= 1'b1;
+		#100;
+		power3 <= 1'b1;
+		#100;
+		power4 <= 1'b1;
+	end
+
+	always @(mprj_io) begin
+		#1 $display("MPRJ-IO state = %b ", mprj_io[7:0]);
+	end
+
+	wire flash_csb;
+	wire flash_clk;
+	wire flash_io0;
+	wire flash_io1;
+
+	wire VDD3V3;
+	wire VDD1V8;
+	wire VSS;
+	
+	assign VDD3V3 = power1;
+	assign VDD1V8 = power2;
+	assign VSS = 1'b0;
+
+	caravel uut (
+		.vddio	  (VDD3V3),
+		.vddio_2  (VDD3V3),
+		.vssio	  (VSS),
+		.vssio_2  (VSS),
+		.vdda	  (VDD3V3),
+		.vssa	  (VSS),
+		.vccd	  (VDD1V8),
+		.vssd	  (VSS),
+		.vdda1    (VDD3V3),
+		.vdda1_2  (VDD3V3),
+		.vdda2    (VDD3V3),
+		.vssa1	  (VSS),
+		.vssa1_2  (VSS),
+		.vssa2	  (VSS),
+		.vccd1	  (VDD1V8),
+		.vccd2	  (VDD1V8),
+		.vssd1	  (VSS),
+		.vssd2	  (VSS),
+		.clock    (clock),
+		.gpio     (gpio),
+		.mprj_io  (mprj_io),
+		.flash_csb(flash_csb),
+		.flash_clk(flash_clk),
+		.flash_io0(flash_io0),
+		.flash_io1(flash_io1),
+		.resetb	  (RSTB)
+	);
+
+	spiflash #(
+		.FILENAME("io_ports_nopull.hex")
+	) spiflash (
+		.csb(flash_csb),
+		.clk(flash_clk),
+		.io0(flash_io0),
+		.io1(flash_io1),
+		.io2(),			// not used
+		.io3()			// not used
+	);
+
+endmodule
+`default_nettype wire
diff --git a/verilog/dv/io_ports_pulldown/Makefile b/verilog/dv/io_ports_pulldown/Makefile
new file mode 100644
index 0000000..3fd0b56
--- /dev/null
+++ b/verilog/dv/io_ports_pulldown/Makefile
@@ -0,0 +1,32 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+
+ 
+PWDD := $(shell pwd)
+BLOCKS := $(shell basename $(PWDD))
+
+# ---- Include Partitioned Makefiles ----
+
+CONFIG = caravel_user_project
+
+
+include $(MCW_ROOT)/verilog/dv/make/env.makefile
+include $(MCW_ROOT)/verilog/dv/make/var.makefile
+include $(MCW_ROOT)/verilog/dv/make/cpu.makefile
+include $(MCW_ROOT)/verilog/dv/make/sim.makefile
+
+
diff --git a/verilog/dv/io_ports_pulldown/io_ports_pulldown.c b/verilog/dv/io_ports_pulldown/io_ports_pulldown.c
new file mode 100644
index 0000000..ec8586e
--- /dev/null
+++ b/verilog/dv/io_ports_pulldown/io_ports_pulldown.c
@@ -0,0 +1,75 @@
+/*
+ * SPDX-FileCopyrightText: 2020 Efabless Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// This include is relative to $CARAVEL_PATH (see Makefile)
+#include <defs.h>
+#include <stub.c>
+
+/*
+	IO Test:
+		- Configures MPRJ lower 8-IO pins as outputs
+		- Observes counter value through the MPRJ lower 8 IO pins (in the testbench)
+*/
+
+void main()
+{
+	/* 
+	IO Control Registers
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 3-bits | 1-bit | 1-bit | 1-bit  | 1-bit  | 1-bit | 1-bit   | 1-bit   | 1-bit | 1-bit | 1-bit   |
+
+	Output: 0000_0110_0000_1110  (0x1808) = GPIO_MODE_MGMT_STD_INPUT_PULLDOWN
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 110    | 0     | 0     | 0      | 0      | 0     | 0       | 1       | 0     | 0     | 0       |
+	
+	 
+	Input: 0000_0001_0000_1111 (0x0402) = GPIO_MODE_USER_STD_INPUT_NOPULL
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 001    | 0     | 0     | 0      | 0      | 0     | 0       | 0       | 0     | 1     | 0       |
+
+	*/
+
+	/* Set up the housekeeping SPI to be connected internally so	*/
+	/* that external pin changes don't affect it.			*/
+
+	// reg_spi_enable = 1;
+	// reg_spimaster_cs = 0x10001;
+	// reg_spimaster_control = 0x0801;
+
+	// reg_spimaster_control = 0xa002;	// Enable, prescaler = 2,
+                                        // connect to housekeeping SPI
+
+	// Connect the housekeeping SPI to the SPI master
+	// so that the CSB line is not left floating.  This allows
+	// all of the GPIO pins to be used for user functions.
+
+	// Configure lower 8-IOs as user output
+	// Observe counter value in the testbench
+	reg_mprj_io_0 =  GPIO_MODE_MGMT_STD_INPUT_PULLDOWN;
+	reg_mprj_io_1 =  GPIO_MODE_MGMT_STD_INPUT_PULLDOWN;
+	reg_mprj_io_2 =  GPIO_MODE_MGMT_STD_INPUT_PULLDOWN;
+	reg_mprj_io_3 =  GPIO_MODE_MGMT_STD_INPUT_PULLDOWN;
+	reg_mprj_io_4 =  GPIO_MODE_MGMT_STD_INPUT_PULLDOWN;
+	reg_mprj_io_5 =  GPIO_MODE_MGMT_STD_INPUT_PULLDOWN;
+	reg_mprj_io_6 =  GPIO_MODE_MGMT_STD_INPUT_PULLDOWN;
+	reg_mprj_io_7 =  GPIO_MODE_MGMT_STD_INPUT_PULLDOWN;
+
+	/* Apply configuration */
+	reg_mprj_xfer = 1;
+	while (reg_mprj_xfer == 1);
+}
+
diff --git a/verilog/dv/io_ports_pulldown/io_ports_pulldown_tb.v b/verilog/dv/io_ports_pulldown/io_ports_pulldown_tb.v
new file mode 100644
index 0000000..9561029
--- /dev/null
+++ b/verilog/dv/io_ports_pulldown/io_ports_pulldown_tb.v
@@ -0,0 +1,266 @@
+// SPDX-FileCopyrightText: 2020 Efabless Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
+
+`default_nettype none
+
+`timescale 1 ns / 1 ps
+
+module io_ports_pulldown_tb;
+	reg clock;
+	reg RSTB;
+	reg CSB;
+	reg power1, power2;
+	reg power3, power4;
+
+	wire gpio;
+	wire [37:0] mprj_io;
+	wire [7:0] mprj_io_0;
+
+	assign mprj_io_0 = mprj_io[7:0];
+	// assign mprj_io_0 = {mprj_io[8:4],mprj_io[2:0]};
+
+	assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
+	// assign mprj_io[3] = 1'b1;
+
+	// External clock is used by default.  Make this artificially fast for the
+	// simulation.  Normally this would be a slow clock and the digital PLL
+	// would be the fast clock.
+
+	always #12.5 clock <= (clock === 1'b0);
+
+	initial begin
+		clock = 0;
+	end
+
+
+	`ifdef ENABLE_SDF
+		initial begin
+			$sdf_annotate("../../../sdf/user_proj_example.sdf", uut.mprj) ;
+			$sdf_annotate("../../../sdf/user_project_wrapper.sdf", uut.mprj.mprj) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/DFFRAM.sdf", uut.soc.DFFRAM_0) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/mgmt_core.sdf", uut.soc.core) ;
+			$sdf_annotate("../../../caravel/sdf/housekeeping.sdf", uut.housekeeping) ;
+			$sdf_annotate("../../../caravel/sdf/chip_io.sdf", uut.padframe) ;
+			$sdf_annotate("../../../caravel/sdf/mprj_logic_high.sdf", uut.mgmt_buffers.mprj_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mprj2_logic_high.sdf", uut.mgmt_buffers.mprj2_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect_hv.sdf", uut.mgmt_buffers.powergood_check) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect.sdf", uut.mgmt_buffers) ;
+			$sdf_annotate("../../../caravel/sdf/caravel_clocking.sdf", uut.clocking) ;
+			$sdf_annotate("../../../caravel/sdf/digital_pll.sdf", uut.pll) ;
+			$sdf_annotate("../../../caravel/sdf/xres_buf.sdf", uut.rstb_level) ;
+			$sdf_annotate("../../../caravel/sdf/user_id_programming.sdf", uut.user_id_value) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[11] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[12] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[13] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[14] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[15] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_0) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_1) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_2) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_3) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_4) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_5) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_6) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_7) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_8) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_9) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_10) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_11) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_12) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_13) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_14) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_15) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_16) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_17) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_18) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_19) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_20) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_21) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_22) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_23) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_24) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_25) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_26) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_27) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_28) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_29) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_30) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_31) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_32) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_33) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_34) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_35) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_36) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_37) ;
+		end
+	`endif 
+
+	initial begin
+		$dumpfile("io_ports_pulldown.vcd");
+		$dumpvars(0, io_ports_pulldown_tb);
+
+		// Repeat cycles of 1000 clock edges as needed to complete testbench
+		repeat (25) begin
+			repeat (1000) @(posedge clock);
+			// $display("+1000 cycles");
+		end
+		$display("%c[1;31m",27);
+		`ifdef GL
+			$display ("Monitor: Timeout, Test Mega-Project IO Ports (GL) Failed");
+		`else
+			$display ("Monitor: Timeout, Test Mega-Project IO Ports (RTL) Failed");
+		`endif
+		$display("%c[0m",27);
+		$finish;
+	end
+
+	initial begin
+	    // Observe Output pins [7:0]
+		wait(mprj_io_0 == 8'h01);
+		wait(mprj_io_0 == 8'h02);
+		wait(mprj_io_0 == 8'h03);
+		wait(mprj_io_0 == 8'h04);
+		wait(mprj_io_0 == 8'h05);
+		wait(mprj_io_0 == 8'h06);
+		wait(mprj_io_0 == 8'h07);
+		wait(mprj_io_0 == 8'h08);
+		wait(mprj_io_0 == 8'h09);
+		wait(mprj_io_0 == 8'h0A);   
+		wait(mprj_io_0 == 8'hFF);
+		wait(mprj_io_0 == 8'h00);
+		
+		`ifdef GL
+	    	$display("Monitor: Test 1 Mega-Project IO (GL) Passed");
+		`else
+		    $display("Monitor: Test 1 Mega-Project IO (RTL) Passed");
+		`endif
+	    $finish;
+	end
+
+	initial begin
+		RSTB <= 1'b0;
+		CSB  <= 1'b1;		// Force CSB high
+		#2000;
+		RSTB <= 1'b1;	    	// Release reset
+		#3_00_000;
+		CSB = 1'b0;		// CSB can be released
+	end
+
+	initial begin		// Power-up sequence
+		power1 <= 1'b0;
+		power2 <= 1'b0;
+		power3 <= 1'b0;
+		power4 <= 1'b0;
+		#100;
+		power1 <= 1'b1;
+		#100;
+		power2 <= 1'b1;
+		#100;
+		power3 <= 1'b1;
+		#100;
+		power4 <= 1'b1;
+	end
+
+	always @(mprj_io) begin
+		#1 $display("MPRJ-IO state = %b ", mprj_io[7:0]);
+	end
+
+	wire flash_csb;
+	wire flash_clk;
+	wire flash_io0;
+	wire flash_io1;
+
+	wire VDD3V3;
+	wire VDD1V8;
+	wire VSS;
+	
+	assign VDD3V3 = power1;
+	assign VDD1V8 = power2;
+	assign VSS = 1'b0;
+
+	caravel uut (
+		.vddio	  (VDD3V3),
+		.vddio_2  (VDD3V3),
+		.vssio	  (VSS),
+		.vssio_2  (VSS),
+		.vdda	  (VDD3V3),
+		.vssa	  (VSS),
+		.vccd	  (VDD1V8),
+		.vssd	  (VSS),
+		.vdda1    (VDD3V3),
+		.vdda1_2  (VDD3V3),
+		.vdda2    (VDD3V3),
+		.vssa1	  (VSS),
+		.vssa1_2  (VSS),
+		.vssa2	  (VSS),
+		.vccd1	  (VDD1V8),
+		.vccd2	  (VDD1V8),
+		.vssd1	  (VSS),
+		.vssd2	  (VSS),
+		.clock    (clock),
+		.gpio     (gpio),
+		.mprj_io  (mprj_io),
+		.flash_csb(flash_csb),
+		.flash_clk(flash_clk),
+		.flash_io0(flash_io0),
+		.flash_io1(flash_io1),
+		.resetb	  (RSTB)
+	);
+
+	spiflash #(
+		.FILENAME("io_ports_pulldown.hex")
+	) spiflash (
+		.csb(flash_csb),
+		.clk(flash_clk),
+		.io0(flash_io0),
+		.io1(flash_io1),
+		.io2(),			// not used
+		.io3()			// not used
+	);
+
+endmodule
+`default_nettype wire
diff --git a/verilog/dv/io_ports_pullup/Makefile b/verilog/dv/io_ports_pullup/Makefile
new file mode 100644
index 0000000..3fd0b56
--- /dev/null
+++ b/verilog/dv/io_ports_pullup/Makefile
@@ -0,0 +1,32 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+
+ 
+PWDD := $(shell pwd)
+BLOCKS := $(shell basename $(PWDD))
+
+# ---- Include Partitioned Makefiles ----
+
+CONFIG = caravel_user_project
+
+
+include $(MCW_ROOT)/verilog/dv/make/env.makefile
+include $(MCW_ROOT)/verilog/dv/make/var.makefile
+include $(MCW_ROOT)/verilog/dv/make/cpu.makefile
+include $(MCW_ROOT)/verilog/dv/make/sim.makefile
+
+
diff --git a/verilog/dv/io_ports_pullup/io_ports_pullup.c b/verilog/dv/io_ports_pullup/io_ports_pullup.c
new file mode 100644
index 0000000..99d735e
--- /dev/null
+++ b/verilog/dv/io_ports_pullup/io_ports_pullup.c
@@ -0,0 +1,75 @@
+/*
+ * SPDX-FileCopyrightText: 2020 Efabless Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// This include is relative to $CARAVEL_PATH (see Makefile)
+#include <defs.h>
+#include <stub.c>
+
+/*
+	IO Test:
+		- Configures MPRJ lower 8-IO pins as outputs
+		- Observes counter value through the MPRJ lower 8 IO pins (in the testbench)
+*/
+
+void main()
+{
+	/* 
+	IO Control Registers
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 3-bits | 1-bit | 1-bit | 1-bit  | 1-bit  | 1-bit | 1-bit   | 1-bit   | 1-bit | 1-bit | 1-bit   |
+
+	Output: 0000_0110_0000_1110  (0x1808) = GPIO_MODE_MGMT_STD_INPUT_PULLUP
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 110    | 0     | 0     | 0      | 0      | 0     | 0       | 1       | 0     | 0     | 0       |
+	
+	 
+	Input: 0000_0001_0000_1111 (0x0402) = GPIO_MODE_USER_STD_INPUT_NOPULL
+	| DM     | VTRIP | SLOW  | AN_POL | AN_SEL | AN_EN | MOD_SEL | INP_DIS | HOLDH | OEB_N | MGMT_EN |
+	| 001    | 0     | 0     | 0      | 0      | 0     | 0       | 0       | 0     | 1     | 0       |
+
+	*/
+
+	/* Set up the housekeeping SPI to be connected internally so	*/
+	/* that external pin changes don't affect it.			*/
+
+	// reg_spi_enable = 1;
+	// reg_spimaster_cs = 0x10001;
+	// reg_spimaster_control = 0x0801;
+
+	// reg_spimaster_control = 0xa002;	// Enable, prescaler = 2,
+                                        // connect to housekeeping SPI
+
+	// Connect the housekeeping SPI to the SPI master
+	// so that the CSB line is not left floating.  This allows
+	// all of the GPIO pins to be used for user functions.
+
+	// Configure lower 8-IOs as user output
+	// Observe counter value in the testbench
+	reg_mprj_io_0 =  GPIO_MODE_MGMT_STD_INPUT_PULLUP;
+	reg_mprj_io_1 =  GPIO_MODE_MGMT_STD_INPUT_PULLUP;
+	reg_mprj_io_2 =  GPIO_MODE_MGMT_STD_INPUT_PULLUP;
+	reg_mprj_io_3 =  GPIO_MODE_MGMT_STD_INPUT_PULLUP;
+	reg_mprj_io_4 =  GPIO_MODE_MGMT_STD_INPUT_PULLUP;
+	reg_mprj_io_5 =  GPIO_MODE_MGMT_STD_INPUT_PULLUP;
+	reg_mprj_io_6 =  GPIO_MODE_MGMT_STD_INPUT_PULLUP;
+	reg_mprj_io_7 =  GPIO_MODE_MGMT_STD_INPUT_PULLUP;
+
+	/* Apply configuration */
+	reg_mprj_xfer = 1;
+	while (reg_mprj_xfer == 1);
+}
+
diff --git a/verilog/dv/io_ports_pullup/io_ports_pullup_tb.v b/verilog/dv/io_ports_pullup/io_ports_pullup_tb.v
new file mode 100644
index 0000000..1e11e14
--- /dev/null
+++ b/verilog/dv/io_ports_pullup/io_ports_pullup_tb.v
@@ -0,0 +1,266 @@
+// SPDX-FileCopyrightText: 2020 Efabless Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
+
+`default_nettype none
+
+`timescale 1 ns / 1 ps
+
+module io_ports_pullup_tb;
+	reg clock;
+	reg RSTB;
+	reg CSB;
+	reg power1, power2;
+	reg power3, power4;
+
+	wire gpio;
+	wire [37:0] mprj_io;
+	wire [7:0] mprj_io_0;
+
+	assign mprj_io_0 = mprj_io[7:0];
+	// assign mprj_io_0 = {mprj_io[8:4],mprj_io[2:0]};
+
+	assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
+	// assign mprj_io[3] = 1'b1;
+
+	// External clock is used by default.  Make this artificially fast for the
+	// simulation.  Normally this would be a slow clock and the digital PLL
+	// would be the fast clock.
+
+	always #12.5 clock <= (clock === 1'b0);
+
+	initial begin
+		clock = 0;
+	end
+
+
+	`ifdef ENABLE_SDF
+		initial begin
+			$sdf_annotate("../../../sdf/user_proj_example.sdf", uut.mprj) ;
+			$sdf_annotate("../../../sdf/user_project_wrapper.sdf", uut.mprj.mprj) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/DFFRAM.sdf", uut.soc.DFFRAM_0) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/mgmt_core.sdf", uut.soc.core) ;
+			$sdf_annotate("../../../caravel/sdf/housekeeping.sdf", uut.housekeeping) ;
+			$sdf_annotate("../../../caravel/sdf/chip_io.sdf", uut.padframe) ;
+			$sdf_annotate("../../../caravel/sdf/mprj_logic_high.sdf", uut.mgmt_buffers.mprj_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mprj2_logic_high.sdf", uut.mgmt_buffers.mprj2_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect_hv.sdf", uut.mgmt_buffers.powergood_check) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect.sdf", uut.mgmt_buffers) ;
+			$sdf_annotate("../../../caravel/sdf/caravel_clocking.sdf", uut.clocking) ;
+			$sdf_annotate("../../../caravel/sdf/digital_pll.sdf", uut.pll) ;
+			$sdf_annotate("../../../caravel/sdf/xres_buf.sdf", uut.rstb_level) ;
+			$sdf_annotate("../../../caravel/sdf/user_id_programming.sdf", uut.user_id_value) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[11] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[12] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[13] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[14] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[15] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_0) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_1) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_2) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_3) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_4) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_5) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_6) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_7) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_8) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_9) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_10) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_11) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_12) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_13) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_14) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_15) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_16) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_17) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_18) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_19) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_20) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_21) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_22) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_23) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_24) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_25) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_26) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_27) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_28) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_29) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_30) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_31) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_32) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_33) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_34) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_35) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_36) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_37) ;
+		end
+	`endif 
+
+	initial begin
+		$dumpfile("io_ports_pullup.vcd");
+		$dumpvars(0, io_ports_pullup_tb);
+
+		// Repeat cycles of 1000 clock edges as needed to complete testbench
+		repeat (25) begin
+			repeat (1000) @(posedge clock);
+			// $display("+1000 cycles");
+		end
+		$display("%c[1;31m",27);
+		`ifdef GL
+			$display ("Monitor: Timeout, Test Mega-Project IO Ports (GL) Failed");
+		`else
+			$display ("Monitor: Timeout, Test Mega-Project IO Ports (RTL) Failed");
+		`endif
+		$display("%c[0m",27);
+		$finish;
+	end
+
+	initial begin
+	    // Observe Output pins [7:0]
+		wait(mprj_io_0 == 8'h01);
+		wait(mprj_io_0 == 8'h02);
+		wait(mprj_io_0 == 8'h03);
+		wait(mprj_io_0 == 8'h04);
+		wait(mprj_io_0 == 8'h05);
+		wait(mprj_io_0 == 8'h06);
+		wait(mprj_io_0 == 8'h07);
+		wait(mprj_io_0 == 8'h08);
+		wait(mprj_io_0 == 8'h09);
+		wait(mprj_io_0 == 8'h0A);   
+		wait(mprj_io_0 == 8'hFF);
+		wait(mprj_io_0 == 8'h00);
+		
+		`ifdef GL
+	    	$display("Monitor: Test 1 Mega-Project IO (GL) Passed");
+		`else
+		    $display("Monitor: Test 1 Mega-Project IO (RTL) Passed");
+		`endif
+	    $finish;
+	end
+
+	initial begin
+		RSTB <= 1'b0;
+		CSB  <= 1'b1;		// Force CSB high
+		#2000;
+		RSTB <= 1'b1;	    	// Release reset
+		#3_00_000;
+		CSB = 1'b0;		// CSB can be released
+	end
+
+	initial begin		// Power-up sequence
+		power1 <= 1'b0;
+		power2 <= 1'b0;
+		power3 <= 1'b0;
+		power4 <= 1'b0;
+		#100;
+		power1 <= 1'b1;
+		#100;
+		power2 <= 1'b1;
+		#100;
+		power3 <= 1'b1;
+		#100;
+		power4 <= 1'b1;
+	end
+
+	always @(mprj_io) begin
+		#1 $display("MPRJ-IO state = %b ", mprj_io[7:0]);
+	end
+
+	wire flash_csb;
+	wire flash_clk;
+	wire flash_io0;
+	wire flash_io1;
+
+	wire VDD3V3;
+	wire VDD1V8;
+	wire VSS;
+	
+	assign VDD3V3 = power1;
+	assign VDD1V8 = power2;
+	assign VSS = 1'b0;
+
+	caravel uut (
+		.vddio	  (VDD3V3),
+		.vddio_2  (VDD3V3),
+		.vssio	  (VSS),
+		.vssio_2  (VSS),
+		.vdda	  (VDD3V3),
+		.vssa	  (VSS),
+		.vccd	  (VDD1V8),
+		.vssd	  (VSS),
+		.vdda1    (VDD3V3),
+		.vdda1_2  (VDD3V3),
+		.vdda2    (VDD3V3),
+		.vssa1	  (VSS),
+		.vssa1_2  (VSS),
+		.vssa2	  (VSS),
+		.vccd1	  (VDD1V8),
+		.vccd2	  (VDD1V8),
+		.vssd1	  (VSS),
+		.vssd2	  (VSS),
+		.clock    (clock),
+		.gpio     (gpio),
+		.mprj_io  (mprj_io),
+		.flash_csb(flash_csb),
+		.flash_clk(flash_clk),
+		.flash_io0(flash_io0),
+		.flash_io1(flash_io1),
+		.resetb	  (RSTB)
+	);
+
+	spiflash #(
+		.FILENAME("io_ports_pullup.hex")
+	) spiflash (
+		.csb(flash_csb),
+		.clk(flash_clk),
+		.io0(flash_io0),
+		.io1(flash_io1),
+		.io2(),			// not used
+		.io3()			// not used
+	);
+
+endmodule
+`default_nettype wire
diff --git a/verilog/dv/la_test1/la_test1_tb.v b/verilog/dv/la_test1/la_test1_tb.v
index e0fff24..971b238 100644
--- a/verilog/dv/la_test1/la_test1_tb.v
+++ b/verilog/dv/la_test1/la_test1_tb.v
@@ -38,6 +38,100 @@
 		clock = 0;
 	end
 
+	``ifdef ENABLE_SDF
+		initial begin
+			$sdf_annotate("../../../sdf/user_proj_example.sdf", uut.mprj) ;
+			$sdf_annotate("../../../sdf/user_project_wrapper.sdf", uut.mprj.mprj) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/DFFRAM.sdf", uut.soc.DFFRAM_0) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/mgmt_core.sdf", uut.soc.core) ;
+			$sdf_annotate("../../../caravel/sdf/housekeeping.sdf", uut.housekeeping) ;
+			$sdf_annotate("../../../caravel/sdf/chip_io.sdf", uut.padframe) ;
+			$sdf_annotate("../../../caravel/sdf/mprj_logic_high.sdf", uut.mgmt_buffers.mprj_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mprj2_logic_high.sdf", uut.mgmt_buffers.mprj2_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect_hv.sdf", uut.mgmt_buffers.powergood_check) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect.sdf", uut.mgmt_buffers) ;
+			$sdf_annotate("../../../caravel/sdf/caravel_clocking.sdf", uut.clocking) ;
+			$sdf_annotate("../../../caravel/sdf/digital_pll.sdf", uut.pll) ;
+			$sdf_annotate("../../../caravel/sdf/xres_buf.sdf", uut.rstb_level) ;
+			$sdf_annotate("../../../caravel/sdf/user_id_programming.sdf", uut.user_id_value) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[11] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[12] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[13] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[14] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[15] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_0) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_1) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_2) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_3) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_4) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_5) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_6) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_7) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_8) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_9) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_10) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_11) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_12) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_13) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_14) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_15) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_16) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_17) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_18) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_19) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_20) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_21) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_22) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_23) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_24) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_25) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_26) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_27) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_28) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_29) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_30) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_31) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_32) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_33) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_34) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_35) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_36) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_37) ;
+		end
+	`endif 
+
 	// assign mprj_io[3] = 1'b1;
 
 	initial begin
diff --git a/verilog/dv/la_test2/la_test2_tb.v b/verilog/dv/la_test2/la_test2_tb.v
index 6ef965d..41f4ea4 100644
--- a/verilog/dv/la_test2/la_test2_tb.v
+++ b/verilog/dv/la_test2/la_test2_tb.v
@@ -21,21 +21,118 @@
 	reg clock;
 	reg RSTB;
 	reg CSB;
-
 	reg power1, power2;
+	reg power3, power4;
 
 	wire gpio;
 	wire [37:0] mprj_io;
 	wire [15:0] checkbits;
 
 	assign checkbits = mprj_io[31:16];
+	assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
 
-	always #12.5 clock <= (clock === 1'b0);
+	always #15 clock <= (clock === 1'b0);
 
 	initial begin
 		clock = 0;
 	end
 
+
+	`ifdef ENABLE_SDF
+		initial begin
+			$sdf_annotate("../../../sdf/user_proj_example.sdf", uut.mprj) ;
+			$sdf_annotate("../../../sdf/user_project_wrapper.sdf", uut.mprj.mprj) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/DFFRAM.sdf", uut.soc.DFFRAM_0) ;
+			// these breaks the simulation
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/mgmt_core.sdf", uut.soc.core) ;
+			$sdf_annotate("../../../caravel/sdf/housekeeping.sdf", uut.housekeeping) ;
+			$sdf_annotate("../../../caravel/sdf/chip_io.sdf", uut.padframe) ;
+			$sdf_annotate("../../../caravel/sdf/mprj_logic_high.sdf", uut.mgmt_buffers.mprj_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mprj2_logic_high.sdf", uut.mgmt_buffers.mprj2_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect_hv.sdf", uut.mgmt_buffers.powergood_check) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect.sdf", uut.mgmt_buffers) ;
+			$sdf_annotate("../../../caravel/sdf/caravel_clocking.sdf", uut.clocking) ;
+			$sdf_annotate("../../../caravel/sdf/digital_pll.sdf", uut.pll) ;
+			$sdf_annotate("../../../caravel/sdf/xres_buf.sdf", uut.rstb_level) ;
+			$sdf_annotate("../../../caravel/sdf/user_id_programming.sdf", uut.user_id_value) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[11] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[12] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[13] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[14] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[15] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_0) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_1) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_2) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_3) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_4) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_5) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_6) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_7) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_8) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_9) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_10) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_11) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_12) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_13) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_14) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_15) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_16) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_17) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_18) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_19) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_20) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_21) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_22) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_23) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_24) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_25) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_26) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_27) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_28) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_29) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_30) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_31) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_32) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_33) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_34) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_35) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_36) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_37) ;
+		end
+	`endif 
+
 	initial begin
 		$dumpfile("la_test2.vcd");
 		$dumpvars(0, la_test2_tb);
@@ -65,18 +162,26 @@
 
 	initial begin
 		RSTB <= 1'b0;
-		#1000;
-		RSTB <= 1'b1;	    // Release reset
+		CSB  <= 1'b1;		// Force CSB high
 		#2000;
+		RSTB <= 1'b1;	    	// Release reset
+		#3_000_000;
+		CSB = 1'b0;		// CSB can be released
 	end
 
 	initial begin		// Power-up sequence
 		power1 <= 1'b0;
 		power2 <= 1'b0;
-		#200;
+		power3 <= 1'b0;
+		power4 <= 1'b0;
+		#100;
 		power1 <= 1'b1;
-		#200;
+		#100;
 		power2 <= 1'b1;
+		#100;
+		power3 <= 1'b1;
+		#100;
+		power4 <= 1'b1;
 	end
 
     	wire flash_csb;
@@ -84,17 +189,14 @@
 	wire flash_io0;
 	wire flash_io1;
 
+	wire VDD3V3;
 	wire VDD1V8;
-    	wire VDD3V3;
 	wire VSS;
     
 	assign VDD3V3 = power1;
 	assign VDD1V8 = power2;
 	assign VSS = 1'b0;
 
-	assign mprj_io[3] = 1;  // Force CSB high.
-	assign mprj_io[0] = 0;  // Disable debug mode
-
 	caravel uut (
 		.vddio	  (VDD3V3),
 		.vddio_2  (VDD3V3),
diff --git a/verilog/dv/mprj_stimulus/mprj_stimulus_tb.v b/verilog/dv/mprj_stimulus/mprj_stimulus_tb.v
index 68addd0..5b9d858 100644
--- a/verilog/dv/mprj_stimulus/mprj_stimulus_tb.v
+++ b/verilog/dv/mprj_stimulus/mprj_stimulus_tb.v
@@ -13,7 +13,7 @@
 // limitations under the License.
 // SPDX-License-Identifier: Apache-2.0
 
-`default_nettype wire
+`default_nettype none
 
 `timescale 1 ns / 1 ps
 
@@ -21,8 +21,9 @@
     // Signals declaration
     reg clock;
     reg RSTB;
-    reg power1, power2;
     reg CSB;
+	reg power1, power2;
+	
     wire gpio;
     wire [37:0] mprj_io;
     wire [15:0] checkbits;
@@ -34,12 +35,106 @@
 
     assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
 
-    always #12.5 clock <= (clock === 1'b0);
+    always #16 clock <= (clock === 1'b0);
 
     initial begin
         clock = 0;
     end
 
+    `ifdef ENABLE_SDF
+		initial begin
+			$sdf_annotate("../../../sdf/user_proj_example.sdf", uut.mprj) ;
+			$sdf_annotate("../../../sdf/user_project_wrapper.sdf", uut.mprj.mprj) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/DFFRAM.sdf", uut.soc.DFFRAM_0) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/mgmt_core.sdf", uut.soc.core) ;
+			$sdf_annotate("../../../caravel/sdf/housekeeping.sdf", uut.housekeeping) ;
+			$sdf_annotate("../../../caravel/sdf/chip_io.sdf", uut.padframe) ;
+			$sdf_annotate("../../../caravel/sdf/mprj_logic_high.sdf", uut.mgmt_buffers.mprj_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mprj2_logic_high.sdf", uut.mgmt_buffers.mprj2_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect_hv.sdf", uut.mgmt_buffers.powergood_check) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect.sdf", uut.mgmt_buffers) ;
+			$sdf_annotate("../../../caravel/sdf/caravel_clocking.sdf", uut.clocking) ;
+			$sdf_annotate("../../../caravel/sdf/digital_pll.sdf", uut.pll) ;
+			$sdf_annotate("../../../caravel/sdf/xres_buf.sdf", uut.rstb_level) ;
+			$sdf_annotate("../../../caravel/sdf/user_id_programming.sdf", uut.user_id_value) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[11] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[12] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[13] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[14] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[15] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_0) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_1) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_2) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_3) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_4) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_5) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_6) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_7) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_8) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_9) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_10) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_11) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_12) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_13) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_14) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_15) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_16) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_17) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_18) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_19) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_20) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_21) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_22) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_23) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_24) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_25) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_26) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_27) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_28) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_29) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_30) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_31) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_32) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_33) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_34) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_35) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_36) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_37) ;
+		end
+	`endif 
+
     initial begin
         $dumpfile("mprj_stimulus.vcd");
         $dumpvars(0, mprj_stimulus_tb);
@@ -75,13 +170,12 @@
         $finish;
     end
 
-    // Reset Operation
     initial begin
         CSB <= 1'b1;		
         RSTB <= 1'b0;
         #2000;
         RSTB <= 1'b1;       	// Release reset
-        #1000000;
+        #1_100_000;
         CSB <= 1'b0;		// Stop driving CSB
     end
 
@@ -99,9 +193,13 @@
     wire flash_io0;
     wire flash_io1;
 
-    wire VDD3V3 = power1;
-    wire VDD1V8 = power2;
-    wire VSS = 1'b0;
+    wire VDD3V3;
+	wire VDD1V8;
+	wire VSS;
+	
+	assign VDD3V3 = power1;
+	assign VDD1V8 = power2;
+	assign VSS = 1'b0;
 
     caravel uut (
         .vddio	  (VDD3V3),
@@ -132,7 +230,6 @@
 		.resetb	  (RSTB)
     );
 
-
     spiflash #(
         .FILENAME("mprj_stimulus.hex")
     ) spiflash (
diff --git a/verilog/dv/wb_port/wb_port.c b/verilog/dv/wb_port/wb_port.c
index 4f59055..e649f7c 100644
--- a/verilog/dv/wb_port/wb_port.c
+++ b/verilog/dv/wb_port/wb_port.c
@@ -81,6 +81,7 @@
 	reg_mprj_datal = 0xAB600000;
 
     reg_mprj_slave = 0x00002710;
+    reg_mprj_datal = 0xAB610000;
     if (reg_mprj_slave == 0x2B3D) {
         reg_mprj_datal = 0xAB610000;
     }
diff --git a/verilog/dv/wb_port/wb_port_tb.v b/verilog/dv/wb_port/wb_port_tb.v
index d5c2983..0194f39 100644
--- a/verilog/dv/wb_port/wb_port_tb.v
+++ b/verilog/dv/wb_port/wb_port_tb.v
@@ -31,7 +31,7 @@
 
 	assign checkbits = mprj_io[31:16];
 
-	assign mprj_io[3] = 1'b1;
+	assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
 
 	// External clock is used by default.  Make this artificially fast for the
 	// simulation.  Normally this would be a slow clock and the digital PLL
@@ -43,12 +43,106 @@
 		clock = 0;
 	end
 
+	`ifdef ENABLE_SDF
+		initial begin
+			$sdf_annotate("../../../sdf/user_proj_example.sdf", uut.mprj) ;
+			$sdf_annotate("../../../sdf/user_project_wrapper.sdf", uut.mprj.mprj) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/DFFRAM.sdf", uut.soc.DFFRAM_0) ;
+			$sdf_annotate("../../../mgmt_core_wrapper/sdf/mgmt_core.sdf", uut.soc.core) ;
+			$sdf_annotate("../../../caravel/sdf/housekeeping.sdf", uut.housekeeping) ;
+			$sdf_annotate("../../../caravel/sdf/chip_io.sdf", uut.padframe) ;
+			$sdf_annotate("../../../caravel/sdf/mprj_logic_high.sdf", uut.mgmt_buffers.mprj_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mprj2_logic_high.sdf", uut.mgmt_buffers.mprj2_logic_high_inst) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect_hv.sdf", uut.mgmt_buffers.powergood_check) ;
+			$sdf_annotate("../../../caravel/sdf/mgmt_protect.sdf", uut.mgmt_buffers) ;
+			$sdf_annotate("../../../caravel/sdf/caravel_clocking.sdf", uut.clocking) ;
+			$sdf_annotate("../../../caravel/sdf/digital_pll.sdf", uut.pll) ;
+			$sdf_annotate("../../../caravel/sdf/xres_buf.sdf", uut.rstb_level) ;
+			$sdf_annotate("../../../caravel/sdf/user_id_programming.sdf", uut.user_id_value) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[0] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[1] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[2] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[3] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[4] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[5] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[6] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[7] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[8] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[9] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[10] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[11] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[12] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[13] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[14] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[15] ) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_0) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_1803.sdf", uut.gpio_defaults_block_1) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_2) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_3) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block_0403.sdf", uut.gpio_defaults_block_4) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_5) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_6) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_7) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_8) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_9) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_10) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_11) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_12) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_13) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_14) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_15) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_16) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_17) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_18) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_19) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_20) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_21) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_22) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_23) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_24) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_25) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_26) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_27) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_28) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_29) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_30) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_31) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_32) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_33) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_34) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_35) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_36) ;
+			$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_37) ;
+		end
+	`endif 
+
 	initial begin
 		$dumpfile("wb_port.vcd");
 		$dumpvars(0, wb_port_tb);
 
 		// Repeat cycles of 1000 clock edges as needed to complete testbench
-		repeat (70) begin
+		repeat (50) begin
 			repeat (1000) @(posedge clock);
 			// $display("+1000 cycles");
 		end
@@ -79,7 +173,7 @@
 		CSB  <= 1'b1;		// Force CSB high
 		#2000;
 		RSTB <= 1'b1;	    	// Release reset
-		#100000;
+		#1_000_000;
 		CSB = 1'b0;		// CSB can be released
 	end