diff --git a/.github/scripts/build/run-set-id.sh b/.github/scripts/build/run-set-id.sh
index b6e9cfb..9cb87f8 100644
--- a/.github/scripts/build/run-set-id.sh
+++ b/.github/scripts/build/run-set-id.sh
@@ -24,7 +24,7 @@
 cd $UPRJ_ROOT
 
 # Install full version of caravel
-git clone https://github.com/efabless/caravel --branch develop --depth 1 $CARAVEL_ROOT
+git clone https://github.com/efabless/caravel --depth 1 $CARAVEL_ROOT
 
 LOG_FILE=out.log
 docker run -v $UPRJ_ROOT:$UPRJ_ROOT -v $PDK_ROOT:$PDK_ROOT -v $CARAVEL_ROOT:$CARAVEL_ROOT -e UPRJ_ROOT=$UPRJ_ROOT -e PDK_ROOT=$PDK_ROOT -e CARAVEL_ROOT=$CARAVEL_ROOT -u $(id -u $USER):$(id -g $USER) $IMAGE_NAME bash -c "cd $CARAVEL_ROOT; make uncompress; cd $UPRJ_ROOT; export USER_ID=$USER_ID; make set_user_id | tee $LOG_FILE;"
@@ -35,4 +35,4 @@
         exit 2; 
 fi
 
-exit 0
\ No newline at end of file
+exit 0
diff --git a/.github/scripts/build/run-ship.sh b/.github/scripts/build/run-ship.sh
index 0217dbc..d084c00 100644
--- a/.github/scripts/build/run-ship.sh
+++ b/.github/scripts/build/run-ship.sh
@@ -23,9 +23,11 @@
 cd $UPRJ_ROOT
 
 # Install full version of caravel
-git clone https://github.com/efabless/caravel --branch develop --depth 1 $CARAVEL_ROOT
+git clone https://github.com/efabless/caravel --depth 1 $CARAVEL_ROOT
 
-docker run -v $UPRJ_ROOT:$UPRJ_ROOT -v $PDK_ROOT:$PDK_ROOT -v $CARAVEL_ROOT:$CARAVEL_ROOT -e UPRJ_ROOT=$UPRJ_ROOT -e PDK_ROOT=$PDK_ROOT -e CARAVEL_ROOT=$CARAVEL_ROOT -u $(id -u $USER):$(id -g $USER) $IMAGE_NAME bash -c "cd $CARAVEL_ROOT; make uncompress; cd $UPRJ_ROOT; make ship;"
+make install_mcw
+
+docker run -v $UPRJ_ROOT:$UPRJ_ROOT -v $PDK_ROOT:$PDK_ROOT -v $CARAVEL_ROOT:$CARAVEL_ROOT -e UPRJ_ROOT=$UPRJ_ROOT -e PDK_ROOT=$PDK_ROOT -e CARAVEL_ROOT=$CARAVEL_ROOT -u $(id -u $USER):$(id -g $USER) $IMAGE_NAME bash -c "cd $CARAVEL_ROOT; make uncompress; cd $UPRJ_ROOT; make -f $CARAVEL_ROOT/Makefile ship;"
 
 SHIP_FILE=$UPRJ_ROOT/gds/caravel.gds
 
diff --git a/.github/workflows/auto_update_submodule.yml b/.github/workflows/auto_update_submodule.yml
deleted file mode 100644
index 7219ddf..0000000
--- a/.github/workflows/auto_update_submodule.yml
+++ /dev/null
@@ -1,41 +0,0 @@
-    
-name: 'Auto-update Submodules'
-
-on:
-  workflow_dispatch:
-  schedule:
-    - cron: "0 0 * * *"
-
-jobs:
-  sync:
-    name: 'Auto-update Submodules'
-    runs-on: ubuntu-latest
-
-    # Use the Bash shell regardless whether the GitHub Actions runner is ubuntu-latest, macos-latest, or windows-latest
-    defaults:
-      run:
-        shell: bash
-
-    steps:
-    # Checkout the repository to the GitHub Actions runner
-    - name: Checkout
-      uses: actions/checkout@v2
-      with:
-        submodules: true
-    
-    # Git config
-    - name: Git Configurations
-      run: |
-        git config --global user.name 'Git bot'
-        git config --global user.email 'bot@noreply.github.com'
-        
-    # Update references
-    - name: Git Sumbodule Update
-      run: |
-        git submodule update --init --recursive
-        git submodule update --remote --recursive
-
-    - name: Commit update
-      run: |
-        git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}
-        git commit -am "Auto updated submodule references" && git push || echo "No changes to commit"
diff --git a/.github/workflows/caravel_build.yml b/.github/workflows/caravel_build.yml
index c615662..3978d7f 100644
--- a/.github/workflows/caravel_build.yml
+++ b/.github/workflows/caravel_build.yml
@@ -13,8 +13,6 @@
     runs-on: ubuntu-latest
     steps:
        - uses: actions/checkout@v2
-         with:
-          submodules: 'true'
       
        - name: Set up QEMU
          uses: docker/setup-qemu-action@v1
@@ -25,19 +23,17 @@
        - name: Install The PDK
          run:  bash ${GITHUB_WORKSPACE}/.github/scripts/dv/pdkBuild.sh
          env: 
-          OPENLANE_TAG:  2021.09.16_03.28.21
+          OPENLANE_TAG:  2021.12.17_05.07.41
 
        - name: Run make ship
          run: bash ${GITHUB_WORKSPACE}/.github/scripts/build/run-ship.sh 
          env: 
-          OPENLANE_TAG:  2021.09.16_03.28.21
+          OPENLANE_TAG:  2021.12.17_05.07.41
           
   set_user_id:
     runs-on: ubuntu-latest
     steps:
        - uses: actions/checkout@v2
-         with:
-          submodules: 'true'
       
        - name: Set up QEMU
          uses: docker/setup-qemu-action@v1
@@ -59,8 +55,6 @@
     runs-on: ubuntu-latest
     steps:
        - uses: actions/checkout@v2
-         with:
-          submodules: 'true'
       
        - name: Set up QEMU
          uses: docker/setup-qemu-action@v1
diff --git a/.github/workflows/user_project_ci.yml b/.github/workflows/user_project_ci.yml
index 5b8ea91..9196114 100644
--- a/.github/workflows/user_project_ci.yml
+++ b/.github/workflows/user_project_ci.yml
@@ -14,8 +14,6 @@
     timeout-minutes: 720
     steps:
       - uses: actions/checkout@v2
-        with:
-          submodules: 'true'
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1
@@ -34,8 +32,6 @@
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-        with:
-          submodules: 'true'
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1
@@ -53,8 +49,6 @@
     runs-on: ubuntu-latest
     steps:
        - uses: actions/checkout@v2
-         with:
-          submodules: 'true'
       
        - name: Set up QEMU
          uses: docker/setup-qemu-action@v1
@@ -78,8 +72,6 @@
     runs-on: ubuntu-latest
     steps:
        - uses: actions/checkout@v2
-         with:
-          submodules: 'true'
       
        - name: Set up QEMU
          uses: docker/setup-qemu-action@v1
@@ -97,4 +89,4 @@
        
        - name: Run DV tests
          # Run test number 0,1,2,3,4 in one job                             <test-ids>   <sim-mode>
-         run: bash ${GITHUB_WORKSPACE}/.github/scripts/dv/run-dv-wrapper.sh 0,1,2,3,4      GL
\ No newline at end of file
+         run: bash ${GITHUB_WORKSPACE}/.github/scripts/dv/run-dv-wrapper.sh 0,1,2,3,4      GL
diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index c73b442..0000000
--- a/.gitmodules
+++ /dev/null
@@ -1,3 +0,0 @@
-[submodule "caravel-lite"]
-	path = caravel
-	url = https://github.com/efabless/caravel-lite
diff --git a/Makefile b/Makefile
index 188e997..9fc63bd 100644
--- a/Makefile
+++ b/Makefile
@@ -24,15 +24,13 @@
 ifeq ($(CARAVEL_LITE),1) 
 	CARAVEL_NAME := caravel-lite
 	CARAVEL_REPO := https://github.com/efabless/caravel-lite 
-	CARAVEL_BRANCH := main
+	CARAVEL_TAG := 'rc-8'
 else
 	CARAVEL_NAME := caravel
 	CARAVEL_REPO := https://github.com/efabless/caravel 
-	CARAVEL_BRANCH := master
+	CARAVEL_TAG := 'rc-8'
 endif
 
-# Install caravel as submodule, (1): submodule, (0): clone
-SUBMODULE?=1
 
 # Include Caravel Makefile Targets
 .PHONY: % : check-caravel
@@ -72,19 +70,8 @@
 # Install caravel
 .PHONY: install
 install:
-ifeq ($(SUBMODULE),1)
-	@echo "Installing $(CARAVEL_NAME) as a submodule.."
-# Convert CARAVEL_ROOT to relative path because .gitmodules doesn't accept '/'
-	$(eval CARAVEL_PATH := $(shell realpath --relative-to=$(shell pwd) $(CARAVEL_ROOT)))
-	@if [ ! -d $(CARAVEL_ROOT) ]; then git submodule add --name $(CARAVEL_NAME) $(CARAVEL_REPO) $(CARAVEL_PATH); fi
-	@git submodule update --init
-	@cd $(CARAVEL_ROOT); git checkout $(CARAVEL_BRANCH)
-	$(MAKE) simlink
-else
 	@echo "Installing $(CARAVEL_NAME).."
-	@git clone $(CARAVEL_REPO) $(CARAVEL_ROOT)
-	@cd $(CARAVEL_ROOT); git checkout $(CARAVEL_BRANCH)
-endif
+	@git clone -b $(CARAVEL_TAG) $(CARAVEL_REPO) $(CARAVEL_ROOT)
 
 # Create symbolic links to caravel's main files
 .PHONY: simlink
@@ -102,30 +89,12 @@
 # Update Caravel
 .PHONY: update_caravel
 update_caravel: check-caravel
-ifeq ($(SUBMODULE),1)
-	@git submodule update --init --recursive
-	cd $(CARAVEL_ROOT) && \
-	git checkout $(CARAVEL_BRANCH) && \
-	git pull
-else
-	cd $(CARAVEL_ROOT)/ && \
-		git checkout $(CARAVEL_BRANCH) && \
-		git pull
-endif
+	cd $(CARAVEL_ROOT)/ && git checkout $(CARAVEL_TAG) && git pull
 
 # Uninstall Caravel
 .PHONY: uninstall
 uninstall: 
-ifeq ($(SUBMODULE),1)
-	git config -f .gitmodules --remove-section "submodule.$(CARAVEL_NAME)"
-	git add .gitmodules
-	git submodule deinit -f $(CARAVEL_ROOT)
-	git rm --cached $(CARAVEL_ROOT)
-	rm -rf .git/modules/$(CARAVEL_NAME)
 	rm -rf $(CARAVEL_ROOT)
-else
-	rm -rf $(CARAVEL_ROOT)
-endif
 
 # Install Openlane
 .PHONY: openlane
diff --git a/verilog/dv/mprj_stimulus/Makefile b/verilog/dv/mprj_stimulus/Makefile
index 3a73b99..b0e4051 100644
--- a/verilog/dv/mprj_stimulus/Makefile
+++ b/verilog/dv/mprj_stimulus/Makefile
@@ -25,6 +25,11 @@
 CARAVEL_RTL_PATH = $(CARAVEL_VERILOG_PATH)/rtl
 CARAVEL_BEHAVIOURAL_MODELS = $(CARAVEL_VERILOG_PATH)/dv/caravel
 
+## Management SoC Pointers
+MGMT_SOC_PATH ?= ../../../../caravel_pico
+MGMT_SOC_VERILOG_PATH = $(MGMT_SOC_PATH)/verilog
+MGMT_SOC_RTL_PATH = $(MGMT_SOC_PATH)/verilog/rtl
+
 ## User Project Pointers
 UPRJ_VERILOG_PATH ?= ../../../verilog
 UPRJ_RTL_PATH = $(UPRJ_VERILOG_PATH)/rtl
@@ -50,12 +55,12 @@
 ifeq ($(SIM),RTL)
 	iverilog $(SIM_DEFINES) -I $(PDK_PATH) \
 	-I $(CARAVEL_BEHAVIOURAL_MODELS) -I $(CARAVEL_RTL_PATH) \
-	-I $(UPRJ_BEHAVIOURAL_MODELS)    -I $(UPRJ_RTL_PATH) \
+	-I $(UPRJ_BEHAVIOURAL_MODELS)    -I $(UPRJ_RTL_PATH) -I $(MGMT_SOC_RTL_PATH) \
 	$< -o $@ 
 else  
 	iverilog $(SIM_DEFINES) -DGL -I $(PDK_PATH) \
 	-I $(CARAVEL_BEHAVIOURAL_MODELS) -I $(CARAVEL_RTL_PATH) -I $(CARAVEL_VERILOG_PATH) \
-	-I $(UPRJ_BEHAVIOURAL_MODELS) -I$(UPRJ_RTL_PATH)   -I $(UPRJ_VERILOG_PATH) \
+	-I $(UPRJ_BEHAVIOURAL_MODELS) -I$(UPRJ_RTL_PATH)   -I $(UPRJ_VERILOG_PATH) -I $(MGMT_SOC_VERILOG_PATH) \
 	$< -o $@ 
 endif
 
diff --git a/verilog/dv/mprj_stimulus/mprj_stimulus.c b/verilog/dv/mprj_stimulus/mprj_stimulus.c
index e4d0a2d..7d2c29a 100644
--- a/verilog/dv/mprj_stimulus/mprj_stimulus.c
+++ b/verilog/dv/mprj_stimulus/mprj_stimulus.c
@@ -31,19 +31,21 @@
     // designed to read the project count through the
     // logic analyzer probes.
     // I/O 6 is configured for the UART Tx line
+
     uint32_t testval;
 
-    reg_spimaster_config = 0xa002;	// Enable, prescaler = 2
+    reg_hkspi_disable = 1;		// Shut off the housekeeping SPI,
+					// so we can use the pins.
 
     reg_mprj_datal = 0x00000000;
     reg_mprj_datah = 0x00000000;
 
-    reg_mprj_io_37 = GPIO_MODE_MGMT_STD_OUTPUT;;
-    reg_mprj_io_36 = GPIO_MODE_MGMT_STD_OUTPUT;;
-    reg_mprj_io_35 = GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
-    reg_mprj_io_34 = GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
-    reg_mprj_io_33 = GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
-    reg_mprj_io_32 = GPIO_MODE_MGMT_STD_BIDIRECTIONAL;
+    reg_mprj_io_37 = GPIO_MODE_MGMT_STD_OUTPUT;
+    reg_mprj_io_36 = GPIO_MODE_MGMT_STD_OUTPUT;
+    reg_mprj_io_35 = GPIO_MODE_MGMT_STD_OUTPUT;
+    reg_mprj_io_34 = GPIO_MODE_MGMT_STD_OUTPUT;
+    reg_mprj_io_33 = GPIO_MODE_MGMT_STD_OUTPUT;
+    reg_mprj_io_32 = GPIO_MODE_MGMT_STD_OUTPUT;
 
     reg_mprj_io_31 = GPIO_MODE_MGMT_STD_OUTPUT;
     reg_mprj_io_30 = GPIO_MODE_MGMT_STD_OUTPUT;
@@ -71,18 +73,13 @@
     reg_mprj_io_9  = GPIO_MODE_USER_STD_OUT_MONITORED;
     reg_mprj_io_8  = GPIO_MODE_USER_STD_OUT_MONITORED;
     reg_mprj_io_7  = GPIO_MODE_USER_STD_OUT_MONITORED;
-    reg_mprj_io_5  = GPIO_MODE_USER_STD_OUTPUT;
-    reg_mprj_io_4  = GPIO_MODE_USER_STD_OUTPUT;
-    reg_mprj_io_3  = GPIO_MODE_USER_STD_OUTPUT;
-    reg_mprj_io_2  = GPIO_MODE_USER_STD_OUTPUT;
-    reg_mprj_io_1  = GPIO_MODE_USER_STD_OUTPUT;
-    reg_mprj_io_0  = GPIO_MODE_USER_STD_OUTPUT;
-
-    reg_mprj_io_6  = GPIO_MODE_MGMT_STD_OUTPUT;
-
-    // Set UART clock to 64 kbaud (enable before I/O configuration)
-    reg_uart_clkdiv = 625;
-    reg_uart_enable = 1;
+    reg_mprj_io_6  = GPIO_MODE_USER_STD_OUT_MONITORED;
+    reg_mprj_io_5  = GPIO_MODE_USER_STD_OUT_MONITORED;
+    reg_mprj_io_4  = GPIO_MODE_USER_STD_OUT_MONITORED;
+    reg_mprj_io_3  = GPIO_MODE_USER_STD_OUT_MONITORED;
+    reg_mprj_io_2  = GPIO_MODE_USER_STD_OUT_MONITORED;
+    reg_mprj_io_1  = GPIO_MODE_USER_STD_OUT_MONITORED;
+    reg_mprj_io_0  = GPIO_MODE_USER_STD_OUT_MONITORED;
 
     /* Apply configuration */
     reg_mprj_xfer = 1;
@@ -116,17 +113,24 @@
 
     // Test ability to force data on channel 37
     // NOTE:  Only the low 6 bits of reg_mprj_datah are meaningful
-    reg_mprj_datah = 0xffffffca;
+
+    reg_mprj_datah = 0x0f0f0fc0;
+    reg_mprj_datah = 0x00000000;
+    reg_mprj_datah = 0x0f0f0fca;
+    reg_mprj_datah = 0x0000000a;
+    reg_mprj_datah = 0x0f0f0fc0;
     reg_mprj_datah = 0x00000000;
     reg_mprj_datah = 0x0f0f0fc5;
-    reg_mprj_datah = 0x00000000;
+    reg_mprj_datah = 0x00000005;
 
     // Test ability to read back data generated by the user project
     // on the "monitored" outputs.  Read from the lower 16 bits and
     // copy the value to the upper 16 bits.
 
     testval = reg_mprj_datal;
-    reg_mprj_datal = ((testval & 0xff8) << 9) & 0xffff0000;
+    reg_mprj_datal = (testval << 16);
+    testval = reg_mprj_datal;
+    reg_mprj_datal = (testval << 16);
 
     // Flag end of the test
     reg_mprj_datal = 0xAB510000;
diff --git a/verilog/dv/mprj_stimulus/mprj_stimulus_tb.v b/verilog/dv/mprj_stimulus/mprj_stimulus_tb.v
index 1409015..0ac0b42 100644
--- a/verilog/dv/mprj_stimulus/mprj_stimulus_tb.v
+++ b/verilog/dv/mprj_stimulus/mprj_stimulus_tb.v
@@ -28,17 +28,8 @@
     reg RSTB;
     reg CSB;
     reg power1, power2;
-    reg power3, power4;
-
-    wire HIGH;
-    wire LOW;
-    wire TRI;
-    assign HIGH = 1'b1;
-    assign LOW = 1'b0;
-    assign TRI = 1'bz;
 
     wire gpio;
-    wire uart_tx;
     wire [37:0] mprj_io;
     wire [15:0] checkbits;
     wire [3:0] status;
@@ -46,8 +37,10 @@
     // Signals Assignment
     assign checkbits  = mprj_io[31:16];
     assign status = mprj_io[35:32];
-    assign uart_tx = mprj_io[6];
-    assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
+
+    // Force CSB high until simulation is underway
+    // Note:  The CSB GPIO pin default needs to be set to a pull-up. . .
+    assign mprj_io[3] = CSB;
 
     always #12.5 clock <= (clock === 1'b0);
 
@@ -74,23 +67,29 @@
         $display("Monitor: mprj_stimulus test started");
         wait(status == 4'ha);
         wait(status == 4'h5);
-	// Value 0009 reflects copying user-controlled outputs to memory and back
-	// to management-controlled outputs.
-        wait(checkbits == 16'h0009);
+
+	// Values reflect copying user-controlled outputs to memory and back
+	// to management-controlled outputs.  Note that there is a slight
+	// discrepancy in timing when using gate level simulation;  either
+	// of the specified values is okay.
+
+        wait(checkbits == 16'h0840 || checkbits == 16'h0841);
+        wait(checkbits == 16'h0a00 || checkbits == 16'h0a01);
+
         wait(checkbits == 16'hAB51);
         $display("Monitor: mprj_stimulus test Passed");
         #10000;
         $finish;
     end
 
-   // Reset Operation
+    // Reset Operation
     initial begin
         RSTB <= 1'b0;
-        CSB  <= 1'b1;       // Force CSB high
+	CSB <= 1'b1;
         #2000;
-        RSTB <= 1'b1;       // Release reset
-        #170000;
-        CSB = 1'b0;         // CSB can be released
+        RSTB <= 1'b1;       	// Release reset
+	#200000;
+	CSB <= 1'bz;		// Stop driving CSB
     end
 
     initial begin		// Power-up sequence
@@ -148,10 +147,5 @@
         .io3()          // not used
     );
 
-    // Testbench UART
-    tbuart tbuart (
-        .ser_rx(uart_tx)
-    );
-
 endmodule
 `default_nettype wire