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YM2610(B): use f-num/block baseFreq calculation

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also allow for different octave boundary f-nums depending on chip clock
This commit is contained in:
tildearrow 2022-05-10 02:22:08 -05:00
parent da71a6a804
commit 5e14177e4e
12 changed files with 198 additions and 170 deletions
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10
src/engine/platform/genesisext.cpp
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@ -127,6 +127,8 @@ int DivPlatformGenesisExt::dispatch(DivCommand c) {
break;
}
case DIV_CMD_NOTE_PORTA: {
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;
@ -148,18 +150,18 @@ int DivPlatformGenesisExt::dispatch(DivCommand c) {
}
// what the heck!
if (!opChan[ch].portaPause) {
if ((newFreq&0x7ff)>1288 && (newFreq&0xf800)<0x3800) {
if ((newFreq&0x7ff)>boundaryTop && (newFreq&0xf800)<0x3800) {
if (parent->song.fbPortaPause) {
opChan[ch].portaPauseFreq=(644)|((newFreq+0x800)&0xf800);
opChan[ch].portaPauseFreq=(boundaryBottom)|((newFreq+0x800)&0xf800);
opChan[ch].portaPause=true;
break;
} else {
newFreq=(newFreq>>1)|((newFreq+0x800)&0xf800);
}
}
if ((newFreq&0x7ff)<644 && (newFreq&0xf800)>0) {
if ((newFreq&0x7ff)<boundaryBottom && (newFreq&0xf800)>0) {
if (parent->song.fbPortaPause) {
opChan[ch].portaPauseFreq=newFreq=(1287)|((newFreq-0x800)&0xf800);
opChan[ch].portaPauseFreq=newFreq=(boundaryTop-1)|((newFreq-0x800)&0xf800);
opChan[ch].portaPause=true;
break;
} else {