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Simplify NMI trigger.

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This commit is contained in:
Brandon Wright 2018-05-18 11:10:01 -05:00
parent 574f3b1780
commit aaae363257
3 changed files with 3 additions and 8 deletions
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6
cpuexec.cpp
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@ -412,13 +412,11 @@ void S9xDoHEventProcessing (void)
SuperFX.oneLineDone = FALSE;
}
/* Did we skip over a late NMI Trigger Pos? If so, reschedule it immediately. */
if (CPU.NMIPending && (CPU.Cycles >= Timings.NMITriggerPos) && (Timings.NMITriggerPos > Timings.H_Max / 2))
Timings.NMITriggerPos = 0;
S9xAPUEndScanline();
CPU.Cycles -= Timings.H_Max;
CPU.PrevCycles -= Timings.H_Max;
if (Timings.NMITriggerPos != 0xffff)
Timings.NMITriggerPos -= Timings.H_Max;
S9xAPUSetReferenceTime(CPU.Cycles);
CPU.V_Counter++;

2
dma.cpp
View File

@ -1291,8 +1291,6 @@ bool8 S9xDoDMA (uint8 Channel)
if (CPU.NMIPending && (Timings.NMITriggerPos != 0xffff))
{
Timings.NMITriggerPos = CPU.Cycles + Timings.NMIDMADelay;
if (Timings.NMITriggerPos >= Timings.H_Max)
Timings.NMITriggerPos -= Timings.H_Max;
}
// Release the memory used in SPC7110 DMA

3
ppu.cpp
View File

@ -1520,8 +1520,6 @@ void S9xSetCPU (uint8 Byte, uint16 Address)
// then, when to call S9xOpcode_NMI()?
CPU.NMIPending = TRUE;
Timings.NMITriggerPos = CPU.Cycles + 6 + 6;
if (Timings.NMITriggerPos >= Timings.H_Max)
Timings.NMITriggerPos -= Timings.H_Max;
#ifdef DEBUGGER
if (Settings.TraceHCEvent)
@ -1798,6 +1796,7 @@ uint8 S9xGetCPU (uint16 Address)
byte = CPU.IRQLine ? 0x80 : 0;
CPU.IRQLine = FALSE;
CPU.IRQTransition = FALSE;
return (byte | (OpenBus & 0x7f));
case 0x4212: // HVBJOY