believe this is the correct decrement logic

2021-03-23 10:56:33 -05:00 · 2021-03-23 10:56:33 -05:00 · 5c428b982e
parent df8b4444b8
commit 5c428b982e
1 changed files with 5 additions and 7 deletions
--- a/src/mmt.s
+++ b/src/mmt.s
@ -1082,11 +1082,11 @@ TestAdvanceLocation        lda          TestDirection

 :dn                        lda          TestSize16Bit
                           beq          :dn8
-:dn16                      dex
-                           cpx          #0
-                           beq          :hitBankBoundry
+:dn16                      cpx          #0                            ;check if already at 0?
+                           beq          :hitBankBoundry               ;
+                           dex                                        
+                           beq          :hitBankBoundry               ;how about now?
                           dex                                        ;
-                           cpx          #0
                           beq          :hitBankBoundryTest           ;we still need to test in this case.  side effect of odd start/ends
                           bra          :testStartAddr
 :dn8                       cpx          #0
@ -1276,7 +1276,6 @@ TestPatchBanks             lda          CurBank

                           rts

-
 CORRUPTOR                  lda          $C000
                           bpl          _nokey
                           and          #11101111
@ -1286,8 +1285,7 @@ CORRUPTOR                  lda          $C000
                           stal         $020000,x
 BANKPATCHXX                =            *-1
                           sta          $C010                         ; clear it or we can't test WaitOnError
-_nokey                     nop
-                           rts
+_nokey                     rts
                           mx           %11