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Delay the VBlank IRQ in CPS-2 driver until part way through VBlank period, fixes text in D&D games

This commit is contained in:
Barry Harris 2011-12-22 19:54:11 +00:00
parent eda80b3025
commit 462f307324
1 changed files with 8 additions and 0 deletions
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8
src/burn/drivers/capcom/cps_run.cpp
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@ -423,8 +423,16 @@ INT32 Cps2Frame()
// nCpsCyclesSegment[0] = (nCpsCycles * nVBlank) / 0x0106;
// nDone += SekRun(nCpsCyclesSegment[0] - nDone);
#if 0
// This triggers the VBlank IRQ straight away at display end,
// it causes glitches in the D&D games text (Press Start, Insert Coin, etc)
SekSetIRQLine(2, SEK_IRQSTATUS_AUTO); // VBlank
SekRun(nCpsCycles - SekTotalCycles());
#else
// Here we delay the VBlank IRQ until frame-end, or part-way through VBlank
SekRun(nCpsCycles - SekTotalCycles());
SekSetIRQLine(2, SEK_IRQSTATUS_AUTO); // VBlank
#endif
if (pBurnDraw) {
CpsDraw();