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"Instant" ARAM DMA shouldn't schedule and event too soon. 

Now that the accuracy of ScheduleEvent has changed, 0 cycles will
schedule an event as soon as possible. But this breaks ATV 2.

So we schedule it 100 cycles out (unless it's a really short copy)
This commit is contained in:
Scott Mansell 2016-04-09 22:34:53 +12:00
parent 94098a50c2
commit 662ed217d7
1 changed files with 3 additions and 4 deletions
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7
Source/Core/Core/HW/DSP.cpp
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@ -212,6 +212,7 @@ void EnableInstantDMA()
CoreTiming::RemoveEvent(et_CompleteARAM); CoreTiming::RemoveEvent(et_CompleteARAM);
CompleteARAM(0, 0); CompleteARAM(0, 0);
instant_dma = true; instant_dma = true;
ERROR_LOG(DSPINTERFACE, "Enabling Instant ARAM DMA hack");
} }
void FlushInstantDMA(u32 address) void FlushInstantDMA(u32 address)
@ -544,14 +545,12 @@ static void Do_ARAM_DMA()
// ARAM DMA transfer rate has been measured on real hw // ARAM DMA transfer rate has been measured on real hw
int ticksToTransfer = (g_arDMA.Cnt.count / 32) * 246; int ticksToTransfer = (g_arDMA.Cnt.count / 32) * 246;
// This is a huge hack that appears to be here only to fix Resident Evil 2/3
if (instant_dma) if (instant_dma)
ticksToTransfer = 0; ticksToTransfer = std::min(ticksToTransfer, 100);
CoreTiming::ScheduleEvent(ticksToTransfer, et_CompleteARAM); CoreTiming::ScheduleEvent(ticksToTransfer, et_CompleteARAM);
if (instant_dma)
CoreTiming::ForceExceptionCheck(100);
last_mmaddr = g_arDMA.MMAddr; last_mmaddr = g_arDMA.MMAddr;
last_aram_dma_count = g_arDMA.Cnt.count; last_aram_dma_count = g_arDMA.Cnt.count;