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SA1 IRQ timing/counter overflow fix, this should fix SA1 games that were previously freezing

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pagefault
2006-02-18 08:52:28 +00:00
parent 70d755e5f8
commit f584bb2954
1 changed files with 4 additions and 4 deletions
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8
zsnes/src/chips/sa1proc.asm
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@@ -120,7 +120,7 @@ NEWSYM SA1Swap
; Check if IRQ is executed on SA-1 ; Check if IRQ is executed on SA-1
xor eax,eax xor eax,eax
mov al,dl mov al,dl
add dh,25 ; add dh,25
mov edi,[SA1tablead+eax*4] mov edi,[SA1tablead+eax*4]
mov byte[SA1Status],1 mov byte[SA1Status],1
test dword[SA1DoIRQ],0FF000003h test dword[SA1DoIRQ],0FF000003h
@@ -163,7 +163,7 @@ NEWSYM SA1Swap
ret ret
.speedhack .speedhack
add dh,100 add dh,90
mov bl,[esi] mov bl,[esi]
inc esi inc esi
@@ -189,7 +189,7 @@ NEWSYM SA1Swap
add byte[CurrentExecSA1],4 add byte[CurrentExecSA1],4
mov byte[SA1Status],0 mov byte[SA1Status],0
add dword[SA1TimerVal],23 add dword[SA1TimerVal],23
; xor dh,dh xor dh,dh
mov dh,18 mov dh,18
cmp esi,dword[SA1LBound] cmp esi,dword[SA1LBound]
jb .stoph jb .stoph
@@ -207,7 +207,7 @@ NEWSYM SA1Swap
ret ret
.nosa1exec .nosa1exec
xor ecx,ecx xor ecx,ecx
add dh,22 add dh,18
add byte[CurrentExecSA1],2 add byte[CurrentExecSA1],2
mov byte[SA1Status],0 mov byte[SA1Status],0
ret ret