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fix IRQ at DMA start edge case

This commit is contained in:
OV2 2012-08-12 19:31:45 +02:00
parent 466c3162d6
commit 3c8804d6ca
1 changed files with 4 additions and 1 deletions
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5
ppu.cpp
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@ -1586,8 +1586,11 @@ void S9xSetCPU (uint8 Byte, uint16 Address)
if (CPU.InDMAorHDMA)
return;
// XXX: Not quite right...
if (Byte)
if (Byte) {
CPU.PrevCycles = CPU.Cycles;
CPU.Cycles += Timings.DMACPUSync;
S9xCheckInterrupts();
}
if (Byte & 0x01)
S9xDoDMA(0);
if (Byte & 0x02)