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OPN/A/B: implement 30xx on ExtCh

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issue #1113
This commit is contained in:
tildearrow 2023-07-29 16:04:39 -05:00
parent 41c41859ed
commit 423f2f5069
5 changed files with 152 additions and 19 deletions
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39
src/engine/platform/ym2610bext.cpp
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@ -374,6 +374,9 @@ int DivPlatformYM2610BExt::dispatch(DivCommand c) {
}
break;
}
case DIV_CMD_FM_HARD_RESET:
opChan[ch].hardReset=c.value;
break;
case DIV_CMD_GET_VOLMAX:
return 127;
break;
@ -404,6 +407,9 @@ static int opChanOffsH[4]={
};
void DivPlatformYM2610BExt::tick(bool sysTick) {
int hardResetElapsed=0;
bool mustHardReset=false;
if (extMode) {
bool writeSomething=false;
unsigned char writeMask=2;
@ -414,6 +420,12 @@ void DivPlatformYM2610BExt::tick(bool sysTick) {
writeMask&=~(1<<(4+i));
opChan[i].keyOff=false;
}
if (opChan[i].hardReset && opChan[i].keyOn) {
mustHardReset=true;
unsigned short baseAddr=chanOffs[extChanOffs]|opOffs[i];
immWrite(baseAddr+ADDR_SL_RR,0x0f);
hardResetElapsed++;
}
}
if (writeSomething) {
immWrite(0x28,writeMask);
@ -509,6 +521,7 @@ void DivPlatformYM2610BExt::tick(bool sysTick) {
bool writeNoteOn=false;
unsigned char writeMask=2;
unsigned char hardResetMask=0;
if (extMode) for (int i=0; i<4; i++) {
if (opChan[i].freqChanged) {
if (parent->song.linearPitch==2) {
@ -535,12 +548,36 @@ void DivPlatformYM2610BExt::tick(bool sysTick) {
writeNoteOn=true;
if (opChan[i].mask) {
writeMask|=1<<(4+i);
if (opChan[i].hardReset) {
hardResetMask|=1<<(4+i);
}
}
if (!opChan[i].hardReset) {
opChan[i].keyOn=false;
}
opChan[i].keyOn=false;
}
}
if (writeNoteOn) {
writeMask^=hardResetMask;
immWrite(0x28,writeMask);
writeMask^=hardResetMask;
// hard reset handling
if (mustHardReset) {
for (unsigned int i=hardResetElapsed; i<hardResetCycles; i++) {
immWrite(0xf0,i&0xff);
}
for (int i=0; i<4; i++) {
if (opChan[i].keyOn && opChan[i].hardReset) {
// restore SL/RR
unsigned short baseAddr=chanOffs[extChanOffs]|opOffs[i];
DivInstrumentFM::Operator& op=chan[extChanOffs].state.op[i];
immWrite(baseAddr+ADDR_SL_RR,(op.rr&15)|(op.sl<<4));
opChan[i].keyOn=false;
}
}
immWrite(0x28,writeMask);
}
}
}