Macro ROMs: slightly different mapping to make it easier to select ma…

…cro ROMs with joystick
rejunity · Nov 10, 2024 · 1610bbd · 1610bbd
1 parent c775fc5
commit 1610bbd
Showing 1 changed file with 10 additions and 14 deletions.
diff --git a/src/tt_um_rejunity_atari2600.v b/src/tt_um_rejunity_atari2600.v
@@ -313,13 +313,9 @@ module tt_um_rejunity_atari2600 (
 
 `ifdef NO_MACRO_ROMS
   always @(*)
-   casez ({use_internal_rom, rom_config[3:1]})
-     4'b0zzz: rom_data = external_rom_data;
-     4'b10zz: rom_data = internal_rom_data;
-     4'b1100: rom_data = internal_rom_data;
-     4'b1101: rom_data = internal_rom_data;
-     4'b1110: rom_data = internal_rom_data;
-     4'b1111: rom_data = internal_rom_data;
+   casez ({use_internal_rom, rom_config[3:0]})
+     5'b0zzzz: rom_data = external_rom_data;
+      default: rom_data = internal_rom_data;
    endcase
 `else 
   rom_2600_0 rom0_I (
@@ -351,13 +347,13 @@ module tt_um_rejunity_atari2600 (
     rom3_data_r <= rom3_data;
   end
   always @(*)
-   casez ({use_internal_rom, rom_config[3:1]})
-     4'b0zzz: rom_data = external_rom_data;
-     4'b10zz: rom_data = internal_rom_data;
-     4'b1100: rom_data = rom0_data_r;
-     4'b1101: rom_data = rom1_data_r;
-     4'b1110: rom_data = rom2_data_r;
-     4'b1111: rom_data = rom3_data_r;
+   casez ({use_internal_rom, rom_config[3:0]})
+     5'b0zzzz: rom_data = external_rom_data;
+     5'b10001: rom_data = rom0_data_r;
+     5'b10010: rom_data = rom1_data_r;
+     5'b10100: rom_data = rom2_data_r;
+     5'b11000: rom_data = rom3_data_r;
+      default: rom_data = internal_rom_data;
    endcase
 `endif