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Improve timing between sequential dma transfers

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1918
This commit is contained in:
Sjoerd van der Berg 2004-08-23 10:06:09 +00:00
parent f7f7f9f4c8
commit dc0be65224
1 changed files with 7 additions and 5 deletions
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12
src/hardware/sblaster.cpp
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@ -224,14 +224,15 @@ static void DSP_DMA_CallBack(DmaChannel * chan, DMAEvent event) {
if (event==DMA_REACHED_TC) return;
else if (event==DMA_MASKED) {
if (sb.mode==MODE_DMA) {
DSP_ChangeMode(MODE_NONE);
LOG(LOG_SB,LOG_NORMAL)("DMA deactivated,stopping output");
sb.mode=MODE_DMA_PAUSE;
// DSP_ChangeMode(MODE_DMA_PAUSE);
LOG(LOG_SB,LOG_NORMAL)("DMA masked,stopping output");
}
} else if (event==DMA_UNMASKED) {
if (sb.mode!=MODE_DMA && sb.dma.mode!=DSP_DMA_NONE) {
if (sb.mode==MODE_DMA_PAUSE && sb.dma.mode!=DSP_DMA_NONE) {
DSP_ChangeMode(MODE_DMA);
CheckDMAEnd();
LOG(LOG_SB,LOG_NORMAL)("DMA Activated,starting output, auto %d block %X",chan->autoinit,chan->basecnt);
LOG(LOG_SB,LOG_NORMAL)("DMA unmasked,starting output, auto %d block %X",chan->autoinit,chan->basecnt);
}
}
}
@ -453,6 +454,7 @@ static void DSP_RaiseIRQEvent(Bitu val) {
static void DSP_DoDMATranfser(DMA_MODES mode,Bitu freq,bool stereo) {
char * type;
sb.mode=MODE_DMA_PAUSE;
sb.chan->FillUp();
sb.dma.left=sb.dma.total;
sb.dma.mode=mode;
@ -670,7 +672,7 @@ static void DSP_DoCommand(void) {
case 0xd5: /* Halt 16-bit DMA */
// DSP_ChangeMode(MODE_NONE);
// Games sometimes already program a new dma before stopping, gives noise
sb.mode=MODE_DMA;
sb.mode=MODE_DMA_PAUSE;
PIC_RemoveEvents(END_DMA_Event);
break;
case 0xd1: /* Enable Speaker */