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OPN(A/B/2/B-B): fix absolutely everything

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This commit is contained in:
tildearrow 2022-05-22 23:47:41 -05:00
parent 3d4f2cfa13
commit 2fa51e482a
16 changed files with 89 additions and 489 deletions
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51
src/engine/platform/ym2203.cpp
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@ -659,56 +659,7 @@ int DivPlatformYM2203::dispatch(DivCommand c) {
}
break;
}
int boundaryBottom=parent->calcBaseFreq(chipClock,CHIP_FREQBASE,0,false);
int boundaryTop=parent->calcBaseFreq(chipClock,CHIP_FREQBASE,12,false);
int destFreq=NOTE_FNUM_BLOCK(c.value2,11);
int newFreq;
bool return2=false;
if (chan[c.chan].portaPause) {
chan[c.chan].baseFreq=chan[c.chan].portaPauseFreq;
}
if (destFreq>chan[c.chan].baseFreq) {
newFreq=chan[c.chan].baseFreq+c.value;
if (newFreq>=destFreq) {
newFreq=destFreq;
return2=true;
}
} else {
newFreq=chan[c.chan].baseFreq-c.value;
if (newFreq<=destFreq) {
newFreq=destFreq;
return2=true;
}
}
// check for octave boundary
// what the heck!
if (!chan[c.chan].portaPause) {
if ((newFreq&0x7ff)>boundaryTop && (newFreq&0xf800)<0x3800) {
if (parent->song.fbPortaPause) {
chan[c.chan].portaPauseFreq=(parent->song.oldOctaveBoundary?(newFreq>>1):boundaryBottom)|((newFreq+0x800)&0xf800);
chan[c.chan].portaPause=true;
break;
} else {
newFreq=(newFreq>>1)|((newFreq+0x800)&0xf800);
}
}
if ((newFreq&0x7ff)<boundaryBottom && (newFreq&0xf800)>0) {
if (parent->song.fbPortaPause) {
chan[c.chan].portaPauseFreq=newFreq=(parent->song.oldOctaveBoundary?(newFreq<<1):(boundaryTop-1))|((newFreq-0x800)&0xf800);
chan[c.chan].portaPause=true;
break;
} else {
newFreq=(newFreq<<1)|((newFreq-0x800)&0xf800);
}
}
}
chan[c.chan].portaPause=false;
chan[c.chan].freqChanged=true;
chan[c.chan].baseFreq=newFreq;
if (return2) {
chan[c.chan].inPorta=false;
return 2;
}
PLEASE_HELP_ME(chan[c.chan]);
break;
}
case DIV_CMD_LEGATO: {