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YM2612: implement OpMask

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will be done for OPM and the rest of the OPN chips later
This commit is contained in:
tildearrow 2022-09-12 01:50:27 -05:00
parent d64e20e859
commit 6e1f54b777
3 changed files with 15 additions and 2 deletions
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7
src/engine/platform/genesis.cpp
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@ -347,6 +347,10 @@ void DivPlatformGenesis::tick(bool sysTick) {
chan[i].state.ams=chan[i].std.ams.val;
rWrite(chanOffs[i]+ADDR_LRAF,(IS_REALLY_MUTED(i)?0:(chan[i].pan<<6))|(chan[i].state.fms&7)|((chan[i].state.ams&3)<<4));
}
if (chan[i].std.ex4.had && chan[i].active) {
chan[i].opMask=chan[i].std.ex4.val&15;
chan[i].opMaskChanged=true;
}
for (int j=0; j<4; j++) {
unsigned short baseAddr=chanOffs[i]|opOffs[j];
DivInstrumentFM::Operator& op=chan[i].state.op[j];
@ -479,8 +483,9 @@ void DivPlatformGenesis::tick(bool sysTick) {
}
chan[i].freqChanged=false;
}
if (chan[i].keyOn) {
if (chan[i].keyOn || chan[i].opMaskChanged) {
if (i<6) immWrite(0x28,(chan[i].opMask<<4)|konOffs[i]);
chan[i].opMaskChanged=false;
chan[i].keyOn=false;
}
}

3
src/engine/platform/genesis.h
View file

@ -45,7 +45,7 @@ class DivPlatformGenesis: public DivPlatformOPN {
unsigned char freqH, freqL;
int freq, baseFreq, pitch, pitch2, portaPauseFreq, note;
int ins;
bool active, insChanged, freqChanged, keyOn, keyOff, portaPause, furnaceDac, inPorta, hardReset;
bool active, insChanged, freqChanged, keyOn, keyOff, portaPause, furnaceDac, inPorta, hardReset, opMaskChanged;
int vol, outVol;
unsigned char pan, opMask;
@ -82,6 +82,7 @@ class DivPlatformGenesis: public DivPlatformOPN {
furnaceDac(false),
inPorta(false),
hardReset(false),
opMaskChanged(false),
vol(0),
outVol(0),
pan(3),