Initial work on reading instructions from bootROM

build/tb_top.Makefile

@@ -1,5 +1,8 @@
 TB       = tb_top
-SOURCES  = gb.sv tb_top.sv
-PATH_SRC = ../rtl:../sim/tbench
+SOURCES  = gb.sv cpu.sv registers.sv control.sv rom.sv tb_top.sv clkgen.sv
+PATH_SRC = ../rtl:../rtl/cpu:../rtl/shared:../sim/tbench:../sim/shared
+
+gb.sdb:  cpu.sdb rom.sdb
+cpu.sdb: control.sdb fetch.sdb registers.sdb
 
 include ../synthflow/vivado/Makefile.rules