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PCE: make the noise actually work

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tildearrow 2021-06-08 21:25:07 -05:00
parent 8b9da366e4
commit 8f3b9e03da
1 changed files with 11 additions and 1 deletions
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12
src/engine/platform/pce.cpp
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@ -40,6 +40,11 @@ void DivPlatformPCE::updateWave(int ch) {
}
}
// TODO: in octave 6 the noise table changes to a tonal one
static unsigned char noiseFreq[12]={
4,13,15,18,21,23,25,27,29,31,0,2
};
void DivPlatformPCE::tick() {
for (int i=0; i<6; i++) {
chan[i].std.next();
@ -51,14 +56,18 @@ void DivPlatformPCE::tick() {
if (!chan[i].inPorta) {
if (chan[i].std.arpMode) {
chan[i].baseFreq=round(FREQ_BASE/pow(2.0f,((float)(chan[i].std.arp+24)/12.0f)));
// noise
chWrite(i,0x07,chan[i].noise?(0x80|noiseFreq[(chan[i].std.arp+24)%12]):0);
} else {
chan[i].baseFreq=round(FREQ_BASE/pow(2.0f,((float)(chan[i].note+chan[i].std.arp-12)/12.0f)));
chWrite(i,0x07,chan[i].noise?(0x80|noiseFreq[(chan[i].note+chan[i].std.arp-12)%12]):0);
}
}
chan[i].freqChanged=true;
} else {
if (chan[i].std.arpMode && chan[i].std.finishedArp) {
chan[i].baseFreq=round(FREQ_BASE/pow(2.0f,((float)(chan[i].note)/12.0f)));
chWrite(i,0x07,chan[i].noise?(0x80|noiseFreq[chan[i].note%12]):0);
chan[i].freqChanged=true;
}
}
@ -100,6 +109,7 @@ int DivPlatformPCE::dispatch(DivCommand c) {
chan[c.chan].baseFreq=round(FREQ_BASE/pow(2.0f,((float)c.value/12.0f)));
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
chWrite(c.chan,0x07,chan[c.chan].noise?(0x80|noiseFreq[chan[c.chan].note%12]):0);
chan[c.chan].active=true;
chan[c.chan].keyOn=true;
chWrite(c.chan,0x04,0x80|chan[c.chan].vol);
@ -164,7 +174,7 @@ int DivPlatformPCE::dispatch(DivCommand c) {
}
case DIV_CMD_STD_NOISE_MODE:
chan[c.chan].noise=c.value;
chWrite(c.chan,0x07,chan[c.chan].noise?0x80:0);
chWrite(c.chan,0x07,chan[c.chan].noise?(0x80|chan[c.chan].note):0);
break;
case DIV_CMD_PANNING: {
chan[c.chan].pan=c.value;