uart: still wtf, aber hey, es ist wenigstens reproduzierbar :D (des zeug aus dem

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

diff --git a/cpu/src/rom_b.vhd b/cpu/src/rom_b.vhd
index df24abcb72c5cf3cd9fccd6ef29068f462cbc37c..1415cb53fabb7fe0cbc6876aad5a4b22b08a5eb3 100644 (file)
--- a/cpu/src/rom_b.vhd
+++ b/cpu/src/rom_b.vhd
@@ -97,19 +97,21 @@ begin
 --1;00000024;07990000;stwnz r3, 0(r2);;;
 --1;00000028;eb7ffb01;br 0;;;
 
+--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";
+
+-------------------------------------------                            
                                                        
 --                             when "00000000000" => data_out <= x"ed000000";
 --                             when "00000000001" => data_out <= x"ed080008";
@@ -121,10 +123,23 @@ begin
 --                             when "00000000111" => data_out <= x"e7a00004";
 --                             when "00000001000" => data_out <= x"e7280004";
 --                     --      when "00000001001" => data_out <= x"eb7ffb81";
-
-                               
-                               when others => data_out <= "11101011000000000000000000000010";
-
+       when "0000000" => data_out <= x"eb000183"; -- br+ main 
+       when "0000001" => data_out <= x"eb000103"; -- br+ main
+       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"e7280000"; -- ldw r5, 0(r0)
+       when "0001011" => data_out <= x"e2a80008"; -- andx r5, 0x1
+       when "0001100" => data_out <= x"0b7fff03"; -- brnz+ uartnrdy 
+       when "0001101" => data_out <= x"e7b88000"; -- stw r7, 0(r1) 
+       when "0001110" => data_out <= x"eb7ffa81"; -- br main 
+       -- just nop until rom end!
+       when others => data_out <= x"fd000000";
                        end case;
                end if;
        end process;