fixed: uart module and simulation-only signals handling

riscv-ac.sim/sim_1/behav/xsim/xsim.dir/tb_riscv_behav/xsim.rlx

@@ -1,6 +1,6 @@
 
 { 
-    crc :  16958966524678923290  , 
+    crc :  8975882019563799446  , 
     ccp_crc :  0  , 
     cmdline : " --incr --debug typical --relax --mt 8 -L xil_defaultlib -L unisims_ver -L unimacro_ver -L secureip --snapshot tb_riscv_behav xil_defaultlib.tb_riscv xil_defaultlib.glbl" , 
     buildDate : "Nov 14 2025" , 

riscv-ac.sim/sim_1/behav/xsim/xsim.dir/tb_riscv_behav/xsimSettings.ini

@@ -28,8 +28,8 @@ VARIABLE_PROTOINST_FILTER=true
 SCOPE_NAME_COLUMN_WIDTH=100
 SCOPE_DESIGN_UNIT_COLUMN_WIDTH=83
 SCOPE_BLOCK_TYPE_COLUMN_WIDTH=103
-OBJECT_NAME_COLUMN_WIDTH=147
-OBJECT_VALUE_COLUMN_WIDTH=49
+OBJECT_NAME_COLUMN_WIDTH=75
+OBJECT_VALUE_COLUMN_WIDTH=75
 OBJECT_DATA_TYPE_COLUMN_WIDTH=75
 PROCESS_NAME_COLUMN_WIDTH=75
 PROCESS_TYPE_COLUMN_WIDTH=75

riscv-ac.sim/sim_1/behav/xsim/xsim.dir/xil_defaultlib/xil_defaultlib.rlx

@@ -4,7 +4,6 @@ Nov 14 2025
 12:36:23
 /home/jomaa/git/riscv-ac/riscv-ac.sim/sim_1/behav/xsim/glbl.v,1756381829,verilog,,,,glbl,,,,,,,,
 ,,,,,,tb_riscv,,,,,,,,
-,,,,,,,,,,,,,,
 /home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/alu.v,1772490502,verilog,,/home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/control.v,,alu,,,../../../../../../../../opt/Xilinx/2025.2/data/rsb/busdef,,,,,
 /home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/control.v,1772486779,verilog,,/home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/dmem.v,,control,,,../../../../../../../../opt/Xilinx/2025.2/data/rsb/busdef,,,,,
 /home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/dmem.v,1772490163,verilog,,/home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/ex_me.v,,dmem,,,../../../../../../../../opt/Xilinx/2025.2/data/rsb/busdef,,,,,
@@ -18,6 +17,6 @@ Nov 14 2025
 /home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/me_wb.v,1772490599,verilog,,/home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/pc.v,,me_wb,,,../../../../../../../../opt/Xilinx/2025.2/data/rsb/busdef,,,,,
 /home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/pc.v,1772490088,verilog,,/home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/regfile.v,,pc,,,../../../../../../../../opt/Xilinx/2025.2/data/rsb/busdef,,,,,
 /home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/regfile.v,1772483280,verilog,,/home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/riscv.v,,regfile,,,../../../../../../../../opt/Xilinx/2025.2/data/rsb/busdef,,,,,
-/home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/riscv.v,1772505870,verilog,,/home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/uart_bootloader.v,,riscv,,,../../../../../../../../opt/Xilinx/2025.2/data/rsb/busdef,,,,,
+/home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/riscv.v,1772584556,verilog,,/home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/uart_bootloader.v,,riscv,,,../../../../../../../../opt/Xilinx/2025.2/data/rsb/busdef,,,,,
 /home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/uart_bootloader.v,1772505678,verilog,,/home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/uart_tx.v,,uart_bootloader,,,../../../../../../../../opt/Xilinx/2025.2/data/rsb/busdef,,,,,
 /home/jomaa/git/riscv-ac/riscv-ac.srcs/sources_1/new/uart_tx.v,1772503459,verilog,,/home/jomaa/git/riscv-ac/riscv-ac.srcs/sim_1/new/tb_riscv.v,,uart_tx,,,../../../../../../../../opt/Xilinx/2025.2/data/rsb/busdef,,,,,