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Improved IRQ timing in Sega SystemY driver

This commit is contained in:
Barry Harris 2011-12-27 22:47:57 +00:00
parent cee3344d2c
commit 358f3d9e8e
3 changed files with 13 additions and 19 deletions
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2
src/burn/drivers/sega/d_ybrd.cpp
View File

@ -1846,8 +1846,6 @@ static INT32 PdriftInit()
INT32 nRet = System16Init();
if (!nRet) YBoardIrq2Scanline = 0;
UINT8 *pTemp = (UINT8*)BurnMalloc(0x0c0000);
memcpy(pTemp, System16PCMData, 0x0c0000);
memset(System16PCMData, 0, 0x180000);

1
src/burn/drivers/sega/sys16.h
View File

@ -101,7 +101,6 @@ extern bool Shangon;
extern bool Hangon;
extern bool System16Z80Enable;
extern INT32 YBoardIrq2Scanline;
extern INT32 System16YM2413IRQInterval;
extern bool System16HasGears;

29
src/burn/drivers/sega/sys16_run.cpp
View File

@ -133,8 +133,6 @@ static INT32 nCyclesTotal[4];
static INT32 nCyclesSegment;
UINT32 System16ClockSpeed = 0;
INT32 YBoardIrq2Scanline = 0;
INT32 System16YM2413IRQInterval;
static bool bUseAsm68KCoreOldValue = false;
@ -2320,8 +2318,6 @@ INT32 System16Init()
if (System16PCMDataSize) {
SegaPCMInit(32215900 / 8, BANK_12M | BANK_MASKF8, System16PCMData, System16PCMDataSize);
}
YBoardIrq2Scanline = 170;
}
GenericTilesInit();
@ -2442,8 +2438,6 @@ INT32 System16Exit()
Hangon = false;
bSystem16BootlegRender = false;
YBoardIrq2Scanline = 0;
System16YM2413IRQInterval = 0;
UPD7759BankAddress = 0;
@ -3102,7 +3096,7 @@ INT32 XBoardFrame()
INT32 YBoardFrame()
{
INT32 nInterleave = 224, i;
INT32 nInterleave = 262, i;
if (System16Reset) System16DoReset();
@ -3134,7 +3128,10 @@ INT32 YBoardFrame()
nNext = (i + 1) * nCyclesTotal[nCurrentCPU] / nInterleave;
nCyclesSegment = nNext - nSystem16CyclesDone[nCurrentCPU];
nSystem16CyclesDone[nCurrentCPU] += SekRun(nCyclesSegment);
if (i == YBoardIrq2Scanline) SekSetIRQLine(2, SEK_IRQSTATUS_AUTO);
if (i == 170) SekSetIRQLine(2, SEK_IRQSTATUS_ACK);
if (i == 171) SekSetIRQLine(2, SEK_IRQSTATUS_NONE);
if (i == 223) SekSetIRQLine(4, SEK_IRQSTATUS_ACK);
if (i == 224) SekSetIRQLine(4, SEK_IRQSTATUS_NONE);
SekClose();
// Run 68000 #2
@ -3144,7 +3141,10 @@ INT32 YBoardFrame()
nCyclesSegment = nNext - nSystem16CyclesDone[nCurrentCPU];
nCyclesSegment = SekRun(nCyclesSegment);
nSystem16CyclesDone[nCurrentCPU] += nCyclesSegment;
if (i == YBoardIrq2Scanline) SekSetIRQLine(2, SEK_IRQSTATUS_AUTO);
if (i == 170) SekSetIRQLine(2, SEK_IRQSTATUS_ACK);
if (i == 171) SekSetIRQLine(2, SEK_IRQSTATUS_NONE);
if (i == 223) SekSetIRQLine(4, SEK_IRQSTATUS_ACK);
if (i == 224) SekSetIRQLine(4, SEK_IRQSTATUS_NONE);
SekClose();
// Run 68000 #3
@ -3154,7 +3154,10 @@ INT32 YBoardFrame()
nCyclesSegment = nNext - nSystem16CyclesDone[nCurrentCPU];
nCyclesSegment = SekRun(nCyclesSegment);
nSystem16CyclesDone[nCurrentCPU] += nCyclesSegment;
if (i == YBoardIrq2Scanline) SekSetIRQLine(2, SEK_IRQSTATUS_AUTO);
if (i == 170) SekSetIRQLine(2, SEK_IRQSTATUS_ACK);
if (i == 171) SekSetIRQLine(2, SEK_IRQSTATUS_NONE);
if (i == 223) SekSetIRQLine(4, SEK_IRQSTATUS_ACK);
if (i == 224) SekSetIRQLine(4, SEK_IRQSTATUS_NONE);
SekClose();
// Run Z80
@ -3190,12 +3193,6 @@ INT32 YBoardFrame()
SegaPCMUpdate(pSoundBuf, nSegmentLength);
}
}
for (i = 0; i < 3; i++) {
SekOpen(i);
SekSetIRQLine(4, SEK_IRQSTATUS_AUTO);
SekClose();
}
if (pBurnDraw) {
YBoardRender();