otomatalabs/furnace
8
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

YM2612: new pitch slide formula

Browse source 
finally nailed it (almost)
This commit is contained in:
tildearrow 2022-04-22 16:46:24 -05:00
parent 8db53faf72
commit 943e013cb4
2 changed files with 16 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

21
src/engine/platform/genesis.cpp
View file

@ -632,21 +632,26 @@ int DivPlatformGenesis::dispatch(DivCommand c) {
}
}
// check for octave boundary
// what the heck!
if (!chan[c.chan].portaPause) {
chan[c.chan].freqChanged=true;
if ((newFreq&0x7ff)>1288) {
newFreq=((newFreq&0x7ff)>>1)|((newFreq+0x800)&0xf800);
/*chan[c.chan].portaPause=true;
break;*/
newFreq=(644)|((newFreq+0x800)&0xf800);
chan[c.chan].portaPause=true;
chan[c.chan].freqChanged=false;
return2=false;
}
if ((newFreq&0x7ff)<644) {
newFreq=(newFreq&0x7ff)<<1|((newFreq-0x800)&0xf800);
/*chan[c.chan].portaPause=true;
break;*/
newFreq=(1287)|((newFreq-0x800)&0xf800);
chan[c.chan].portaPause=true;
chan[c.chan].freqChanged=false;
return2=false;
}
} else {
chan[c.chan].portaPause=false;
chan[c.chan].freqChanged=true;
}
chan[c.chan].baseFreq=newFreq;
chan[c.chan].portaPause=false;
chan[c.chan].freqChanged=true;
if (return2) {
chan[c.chan].inPorta=false;
return 2;