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Improved C4 Op 13 even more (thanks TRAC)

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This commit is contained in:
n-a-c-h
2003-06-08 03:56:30 +00:00
parent b02607c0e1
commit d0c386e4ad
1 changed files with 15 additions and 17 deletions
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32
zsnes/src/cpu/memory.asm
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@@ -2194,29 +2194,27 @@ C4activate:
popad popad
ret ret
.polarcord2 .polarcord2
pushad pushad
mov esi,[C4Ram] mov esi,[C4Ram]
xor eax,eax
xor ecx,ecx xor ecx,ecx
mov cx,[esi+1F80h] mov cx,[esi+1F80h]
and ecx,1FFh and ecx,1FFh
movsx eax,word[esi+1F83h]
add eax,eax
movsx ebx,word[CosTable+ecx*2] movsx ebx,word[CosTable+ecx*2]
mov ax,[esi+1F83h] imul ebx,eax
add ebx,ebx sar ebx,8
imul eax,ebx adc ebx,0
sar eax,8 mov [esi+1F86h],bx
mov [esi+1F86h],ax sar ebx,16
sar eax,16 mov [esi+1F88h],bl
mov [esi+1F88h],al
xor eax,eax
movsx ebx,word[SinTable+ecx*2] movsx ebx,word[SinTable+ecx*2]
mov ax,[esi+1F83h] imul ebx,eax
add ebx,ebx sar ebx,8
imul eax,ebx adc ebx,0
sar eax,8 mov [esi+1F89h],bx
mov [esi+1F89h],ax sar ebx,16
sar eax,16 mov [esi+1F8Bh],bl
mov [esi+1F8Bh],al
popad popad
ret ret
.dosprites .dosprites