uart: WTF

[calu.git] / cpu / src / rom_b.vhd

diff --git a/cpu/src/rom_b.vhd b/cpu/src/rom_b.vhd
index 2bce93deacc07e2cf8ac1c6e0c1dfbe76b9897d9..a0acce488ea9a45ef8b0e6e6a92a5ec85a62ca77 100644 (file)
--- a/cpu/src/rom_b.vhd
+++ b/cpu/src/rom_b.vhd
@@ -99,17 +99,17 @@ begin
 
 --uart test:
 
-                               when "0000000" => data_out <= x"ed010058";
-                               when "0000001" => data_out <= x"ed090060";
-                               when "0000010" => data_out <= x"ed110080"; --x"e7188000";  f
-                               when "0000011" => data_out <= x"ed390000"; --x"ec1a0000";
-                               when "0000100" => data_out <= x"ed480012";
-                               when "0000101" => data_out <= x"e7438000";
-                               when "0000110" => data_out <= x"e254c000"; -- f
-                               when "0000111" => data_out <= x"07188000";
-                               when "0001000" => data_out <= x"07980000";
-                               when "0001001" => data_out <= x"07990000";
-                               when "0001010" => data_out <= x"eb7ffb81";
+--                             when "0000000" => data_out <= x"ed010058";
+--                             when "0000001" => data_out <= x"ed090060";
+--                             when "0000010" => data_out <= x"ed110080"; --x"e7188000";  f
+--                             when "0000011" => data_out <= x"ed390000"; --x"ec1a0000";
+--                             when "0000100" => data_out <= x"ed480012";
+--                             when "0000101" => data_out <= x"e7438000";
+--                             when "0000110" => data_out <= x"e254c000"; -- f
+--                             when "0000111" => data_out <= x"07188000";
+--                             when "0001000" => data_out <= x"07980000";
+--                             when "0001001" => data_out <= x"07990000";
+--                             when "0001010" => data_out <= x"eb7ffb81";
 
 -------------------------------------------                            
                                                        
@@ -123,12 +123,20 @@ begin
 --                             when "00000000111" => data_out <= x"e7a00004";
 --                             when "00000001000" => data_out <= x"e7280004";
 --                     --      when "00000001001" => data_out <= x"eb7ffb81";
-
---                             when "0000000" => data_out <= x"eb000181";
---                             when "0000001" => data_out <= x"F0000000";
---                             when "0000010" => data_out <= x"eb000008";
---                             when others => data_out <= "11101011000000000000000000000010";
-
+       when "0000000" => data_out <= x"eb000183"; -- br+ main 
+       when "0000001" => data_out <= x"eb000407"; -- call+ uartrdy
+       when "0000010" => data_out <= x"eb000008"; -- ret
+       when "0000011" => data_out <= x"ed010000"; -- ldi r0, 0x2000 
+       when "0000100" => data_out <= x"ed090058"; -- ldi r1, 0x200b 
+       when "0000101" => data_out <= x"ed110060"; -- ldi r2, 0x200c 
+       when "0000110" => data_out <= x"e7280000"; -- ldw r5, 0(r0)
+       when "0000111" => data_out <= x"e2a80010"; -- andx r5, 0x2
+       when "0001000" => data_out <= x"1b7ffd83"; -- brzs+ main
+       when "0001001" => data_out <= x"e7390000"; -- ldw r7, 0(r2)
+       when "0001010" => data_out <= x"e7b88000"; -- stw r7, 0(r1)
+       when "0001011" => data_out <= x"eb7ffc01"; -- br main
+       -- just nop until rom end!
+       when others => data_out <= x"fd000000";
                        end case;
                end if;
        end process;