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Change Sega System 16A to use new DAC

This commit is contained in:
Barry Harris 2012-03-15 12:19:22 +00:00
parent cc74658951
commit cb73845b2d
1 changed files with 11 additions and 5 deletions
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16
src/burn/drv/sega/sys16_run.cpp
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@ -1441,6 +1441,11 @@ static void System16UPD7759DrqCallback(INT32 state)
if (state) ZetNmi();
}
static INT32 System16ASyncDAC()
{
return (INT32)(float)(nBurnSoundLen * (I8039TotalCycles() / ((6000000.0000 / 15) / (nBurnFPS / 100.0000))));
}
/*====================================================
Multiply Protection Chip Emulation
====================================================*/
@ -1846,7 +1851,7 @@ INT32 System16Init()
N7751SetCPUOpReadArgHandler(N7751Read);
YM2151SetPortWriteHandler(0, &System16N7751ControlWrite);
DACInit(0, 0, 1);
DACInit(0, 0, 1, System16ASyncDAC);
}
System16TileBankSize = 0x1000;
@ -2519,7 +2524,7 @@ Frame Functions
INT32 System16AFrame()
{
INT32 nInterleave = nBurnSoundLen; // for the DAC
INT32 nInterleave = 100; // alien syndrome needs high interleave for the DAC sounds to be processed
if (System16Reset) System16DoReset();
@ -2534,6 +2539,7 @@ INT32 System16AFrame()
SekNewFrame();
ZetNewFrame();
I8039NewFrame();
SekOpen(0);
for (INT32 i = 0; i < nInterleave; i++) {
@ -2568,9 +2574,8 @@ INT32 System16AFrame()
ZetOpen(0);
BurnYM2151Render(pSoundBuf, nSegmentLength);
ZetClose();
if (System167751ProgSize) DACUpdate(pSoundBuf, nSegmentLength);
nSoundBufferPos += nSegmentLength;
ZetClose();
}
}
@ -2588,8 +2593,9 @@ INT32 System16AFrame()
ZetOpen(0);
BurnYM2151Render(pSoundBuf, nSegmentLength);
ZetClose();
if (System167751ProgSize) DACUpdate(pSoundBuf, nSegmentLength);
}
if (System167751ProgSize) DACUpdate(pBurnSoundOut, nBurnSoundLen);
}
if (pBurnDraw) System16ARender();