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AY8930: implement noise and/or mask

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cannot confirm whether this behavior is accurate to hardware though...
thanks Eulous for details on this!
This commit is contained in:
tildearrow 2022-01-18 18:21:27 -05:00
parent 488bd45907
commit 5a7cf57aa2
6 changed files with 68 additions and 24 deletions
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18
src/engine/platform/ay8930.cpp
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@ -271,6 +271,14 @@ int DivPlatformAY8930::dispatch(DivCommand c) {
case DIV_CMD_AY_ENVELOPE_SLIDE:
ayEnvSlide[c.chan]=c.value;
break;
case DIV_CMD_AY_NOISE_MASK_AND:
ayNoiseAnd=c.value;
immWrite(0x19,ayNoiseAnd);
break;
case DIV_CMD_AY_NOISE_MASK_OR:
ayNoiseOr=c.value;
immWrite(0x1a,ayNoiseOr);
break;
case DIV_ALWAYS_SET_VOLUME:
return 0;
break;
@ -325,14 +333,8 @@ void DivPlatformAY8930::reset() {
pendingWrites[i]=-1;
}
lastBusy=60;
dacMode=0;
dacPeriod=0;
dacPos=0;
dacRate=0;
dacSample=-1;
sampleBank=0;
ayNoiseAnd=0;
ayNoiseOr=0;
delay=0;
extMode=false;