support Mockingboard 4C in slot 5

2024-10-06 09:56:43 +00:00 · 2024-08-24 08:22:11 -07:00 · 2024-08-24 08:22:11 -07:00 · 7e38d5b9e7
commit 7e38d5b9e7
parent a64aa9cba7
1 changed files with 11 additions and 1 deletions
--- a/src/hw.mockingboard.a
+++ b/src/hw.mockingboard.a
@ -56,8 +56,18 @@ GetMockingboardStuff
         sta   MAGIC_Z80_LOCATION, x
         dex
         bpl   -
-         stx   $C403                 ; enable Mockingboard 4C support
+
+         lda   $C405
+         cmp   #$38
+         bne   not_mouse
+         lda   $C407
+         cmp   #$18
+         beq   +                     ; looks like the mouse
+         stx   $C403                 ; enable Mockingboard 4C support in slot 4
         stx   $C404
+         bne   @not_iic              ; always
+        stx   $C503                 ; try enable Mockingboard 4C support in slot 5 instead
+         stx   $C504

@not_iic
         lda   #$00