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Megadrive Timing Improvements

This commit is contained in:
Barry Harris 2014-08-01 21:13:51 +00:00
parent 11e60448ce
commit a96d2c5b83
1 changed files with 3 additions and 3 deletions
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6
src/burn/drv/megadrive/megadrive.cpp
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@ -4175,7 +4175,7 @@ INT32 MegadriveFrame()
// there must be a gap between H and V ints, also after vblank bit set (Mazin Saga, Bram Stoker's Dracula)
SekOpen(0);
// done_68k+=SekRun(128);
BurnTimerUpdate((y * cycles_68k) + 128 - cycles_68k);
BurnTimerUpdate(((y + 1) * cycles_68k) + 128);
SekClose();
RamVReg->pending_ints |= 0x20;
@ -4192,12 +4192,12 @@ INT32 MegadriveFrame()
// Run scanline
SekOpen(0);
BurnTimerUpdate(y * cycles_68k);
BurnTimerUpdate((y + 1) * cycles_68k);
SekClose();
if (Z80HasBus && !MegadriveZ80Reset) {
ZetOpen(0);
done_z80 += ZetRun(cycles_z80);
done_z80 += ZetRun(((y + 1) * cycles_z80) - done_z80);
if (y == line_sample) ZetSetIRQLine(0, ZET_IRQSTATUS_ACK);
if (y == line_sample + 1) ZetSetIRQLine(0, ZET_IRQSTATUS_NONE);
ZetClose();