Fix for Super James Pond II

2001-08-21 02:29:58 +00:00
parent 602153841b
commit 9ce2eea0d8
1 changed files with 8 additions and 0 deletions
--- a/zsnes/src/cpu/regsw.inc
+++ b/zsnes/src/cpu/regsw.inc
@@ -492,8 +492,11 @@ reg2101w:
 .objadds1 dw 14,14,14,14,14,12,14,14
 .objadds2 dw 14,12,8,12,8,8,14,14

+NEWSYM oamlow, db 0
+
 ; OAM address register
 reg2102w:
+    mov byte[oamlow],1
    mov word[oamaddr],0
    shr word[oamaddr],1
    mov [oamaddr],al
@@ -522,6 +525,11 @@ reg2102w:

 ; OAM address register
 reg2103w:
+    cmp byte[oamlow],1
+    je  .afteroamlow
+    ret
+.afteroamlow
+    mov byte[oamlow],0
    mov bl,al
    and bl,01h
    shr word[oamaddr],1