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YM2612: earliest completely untested CSM work

This commit is contained in:
tildearrow 2022-06-03 14:10:28 -05:00
parent 2ac9651009
commit 365e466611
1 changed files with 35 additions and 2 deletions
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37
src/engine/platform/genesis.cpp
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@ -28,6 +28,7 @@ static unsigned char konOffs[6]={
0, 1, 2, 4, 5, 6
};
#define CHIP_DIVIDER 64
#define CHIP_FREQBASE 9440540
const char* DivPlatformGenesis::getEffectName(unsigned char effect) {
@ -511,8 +512,26 @@ void DivPlatformGenesis::tick(bool sysTick) {
}
}
if (extMode && softPCM) {
if (chan[7].freqChanged) {
chan[7].freq=parent->calcFreq(chan[7].baseFreq,chan[7].pitch,true,0,chan[7].pitch2,chipClock,CHIP_DIVIDER);
int wf=0x400-chan[7].freq;
immWrite(0x24,wf&0xff);
immWrite(0x25,wf>>8);
chan[7].freqChanged=false;
}
for (int i=0; i<8; i++) {
if (chan[7].keyOn) {
immWrite(0x27,0x81);
chan[7].keyOn=false;
}
if (chan[7].keyOff) {
immWrite(0x27,0x40);
chan[7].keyOff=false;
}
}
for (int i=0; i<7; i++) {
if (i==2 && extMode) continue;
if (chan[i].freqChanged) {
if (parent->song.linearPitch==2) {
@ -582,6 +601,20 @@ int DivPlatformGenesis::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON: {
DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_FM);
if (c.chan==7 && extMode && softPCM) { // CSM
chan[c.chan].macroInit(ins);
chan[c.chan].insChanged=false;
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
chan[c.chan].portaPause=false;
chan[c.chan].note=c.value;
chan[c.chan].freqChanged=true;
}
chan[c.chan].keyOn=true;
chan[c.chan].active=true;
break;
}
if (c.chan>=5) {
if (ins->type==DIV_INS_AMIGA) {
chan[c.chan].dacMode=1;
@ -684,7 +717,7 @@ int DivPlatformGenesis::dispatch(DivCommand c) {
break;
}
case DIV_CMD_NOTE_OFF:
if (c.chan>=5) {
if (c.chan>=5 && c.chan<7) {
chan[c.chan].dacSample=-1;
if (dumpWrites) addWrite(0xffff0002,0);
if (parent->song.brokenDACMode) {