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AY/8930: implement tone and env period macros

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This commit is contained in:
tildearrow 2024-07-05 16:18:08 -05:00
parent e495c8d990
commit 8f577fb669
5 changed files with 45 additions and 6 deletions
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19
src/engine/platform/ay8930.cpp
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@ -323,6 +323,15 @@ void DivPlatformAY8930::tick(bool sysTick) {
ayNoiseOr=chan[i].std.fms.val;
immWrite(0x1a,ayNoiseOr);
}
if (chan[i].std.ex4.had) {
chan[i].fixedFreq=chan[i].std.ex4.val;
chan[i].freqChanged=true;
}
if (chan[i].std.ex5.had) {
chan[i].envelope.period=chan[i].std.ex5.val;
immWrite(regPeriodL[i],chan[i].envelope.period);
immWrite(regPeriodH[i],chan[i].envelope.period>>8);
}
if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,true,0,chan[i].pitch2,chipClock,CHIP_DIVIDER);
if (chan[i].dac.furnaceDAC) {
@ -353,8 +362,13 @@ void DivPlatformAY8930::tick(bool sysTick) {
chan[i].curPSGMode.val=0;
rWrite(0x08+i,0);
}
rWrite((i)<<1,chan[i].freq&0xff);
rWrite(1+((i)<<1),chan[i].freq>>8);
if (chan[i].fixedFreq>0) {
rWrite((i)<<1,chan[i].fixedFreq&0xff);
rWrite(1+((i)<<1),chan[i].fixedFreq>>8);
} else {
rWrite((i)<<1,chan[i].freq&0xff);
rWrite(1+((i)<<1),chan[i].freq>>8);
}
if (chan[i].keyOn) chan[i].keyOn=false;
if (chan[i].keyOff) chan[i].keyOff=false;
if (chan[i].freqChanged && chan[i].autoEnvNum>0 && chan[i].autoEnvDen>0) {
@ -504,6 +518,7 @@ int DivPlatformAY8930::dispatch(DivCommand c) {
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
}
chan[c.chan].fixedFreq=0;
chan[c.chan].active=true;
chan[c.chan].keyOn=true;
chan[c.chan].macroInit(ins);