move back to ghdl because nvc can't trace records yet, even though it simulates them

ghdl_lattice.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+rm *.o *.cf  
+
+ghdl -a cpu2j0_pkg.vhd components_pkg.vhd mult_pkg.vhd decode_pkg.vhd decode_body.vhd datapath_pkg.vhd cpu.vhd decode.vhd decode_core.vhd decode_table.vhd decode_table_reverse.vhd datapath.vhd register_file.vhd mult.vhd 
+
+ghdl -a  data_bus_pkg.vhd monitor_pkg.vhd ram_init.vhd lattice_ebr.vhd bus_monitor.vhd timeout_cnt.vhd cpu_simple_sram.vhd
+
+ghdl -a --work=sb_ice40_components_syn clk_sim.vhd
+
+ghdl -a cpu_lattice.vhd lattice_tb.vhd
+
+ghdl -e lattice_tb
+
+./lattice_tb --stop-time=2700ns --wave=out.ghw

ram_init.vhd

@@ -1161,17 +1161,17 @@ package bootrom is
     x"616e6765",
     x"7365743a",
     x"20202031",
-    x"303a6530",
-    x"66303765",
-    x"32323466",
-    x"65320a62",
+    x"313a6161",
+    x"34323266",
+    x"33346365",
+    x"34630a62",
     x"75696c64",
-    x"3a204672",
-    x"69204d61",
-    x"72202038",
-    x"2030313a",
-    x"31313a34",
-    x"35204553",
+    x"3a205361",
+    x"74204d61",
+    x"72202039",
+    x"2031383a",
+    x"33393a32",
+    x"31204553",
     x"54203230",
     x"31390a00",
     others => x"00000000" );

register_file.vhd

@@ -106,7 +106,7 @@ architecture two_bank of register_file is
   constant ZERO_ADDR : addr_t := (others => '0');
 
   type ram_type is array(0 to NUM_REGS - 1) of data_t;
-  signal bank_a, bank_b : ram_type;
+  signal bank_a, bank_b : ram_type := (others => (others => '0'));
   signal reg0 : data_t;
 
   signal da :  std_logic_vector(REG_WIDTH-1 downto 0);
@@ -175,4 +175,4 @@ begin
       ex_pipes(1) <= ex_pipes(0);
     end if;
   end process;
-end architecture;
+end architecture;