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Fixed RAM fill in Seibu DMA COP command 0x116, allowing Godzilla to boot [Angelo Salese]

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This commit is contained in:
Angelo Salese 2010-12-26 15:07:23 +00:00
parent 570bb1cae5
commit 29733a2f0f
1 changed files with 4 additions and 5 deletions
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9
src/mame/machine/seicop.c
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@ -2434,7 +2434,7 @@ static WRITE16_HANDLER( generic_cop_w )
return; return;
} }
/* Godzilla, hack (and imperfect) implementation until we understand ... */ /* Godzilla specific */
if (cop_dma_trigger == 0x116) if (cop_dma_trigger == 0x116)
{ {
UINT32 length, address; UINT32 length, address;
@ -2444,11 +2444,10 @@ static WRITE16_HANDLER( generic_cop_w )
// return; // return;
address = (cop_dma_src[cop_dma_trigger] << 6); address = (cop_dma_src[cop_dma_trigger] << 6);
length = ((cop_dma_size[cop_dma_trigger]+1) << 5); length = ((cop_dma_size[cop_dma_trigger]+1) << 4);
printf("%08x %08x\n",address,length); /* guess: palette can't be cleared by this, only by 0x8* commands? */
if((address & 0x11f000) == 0x104000)
if(length & 0x23ff)
return; return;
for (i=address;i<address+length;i+=4) for (i=address;i<address+length;i+=4)