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more C64 work

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This commit is contained in:
tildearrow 2021-12-05 16:45:29 -05:00
parent 24956e8177
commit 480b26c95c
3 changed files with 22 additions and 34 deletions
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41
src/engine/platform/c64.cpp
View file

@ -48,15 +48,13 @@ void DivPlatformC64::tick() {
sid.write(i*7+2,chan[i].duty&0xff);
sid.write(i*7+3,chan[i].duty>>8);
}
if (chan[i].sweepChanged) {
chan[i].sweepChanged=false;
if (i==0) {
//rWrite(16+i*5,chan[i].sweep);
}
if (chan[i].std.hadWave) {
chan[i].wave=chan[i].std.wave;
sid.write(i*7+4,(chan[i].wave<<4)|chan[i].active);
}
if (chan[i].testWhen>0) {
if (--chan[i].testWhen<1) {
sid.write(i*7+4,8);
sid.write(i*7+4,(chan[i].wave<<4)|8);
}
}
if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
@ -65,24 +63,12 @@ void DivPlatformC64::tick() {
if (chan[i].keyOn) {
sid.write(i*7+5,(ins->c64.a<<4)|(ins->c64.d));
sid.write(i*7+6,(ins->c64.s<<4)|(ins->c64.r));
sid.write(i*7+4,
(ins->c64.noiseOn<<7)|
(ins->c64.pulseOn<<6)|
(ins->c64.sawOn<<5)|
(ins->c64.triOn<<4)|
1
);
sid.write(i*7+4,(chan[i].wave<<4)|1);
}
if (chan[i].keyOff) {
sid.write(i*7+5,(ins->c64.a<<4)|(ins->c64.d));
sid.write(i*7+6,(ins->c64.s<<4)|(ins->c64.r));
sid.write(i*7+4,
(ins->c64.noiseOn<<7)|
(ins->c64.pulseOn<<6)|
(ins->c64.sawOn<<5)|
(ins->c64.triOn<<4)|
0
);
sid.write(i*7+4,(chan[i].wave<<4)|0);
}
sid.write(i*7,chan[i].freq&0xff);
sid.write(i*7+1,chan[i].freq>>8);
@ -95,17 +81,20 @@ void DivPlatformC64::tick() {
int DivPlatformC64::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON:
case DIV_CMD_NOTE_ON: {
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
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;
chan[c.chan].active=true;
chan[c.chan].keyOn=true;
chan[c.chan].duty=(parent->getIns(chan[c.chan].ins)->c64.duty*4095)/100;
chan[c.chan].duty=(ins->c64.duty*4095)/100;
sid.write(c.chan*7+2,chan[c.chan].duty&0xff);
sid.write(c.chan*7+3,chan[c.chan].duty>>8);
chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
chan[c.chan].wave=(ins->c64.noiseOn<<3)|(ins->c64.pulseOn<<2)|(ins->c64.sawOn<<1)|(ins->c64.triOn);
chan[c.chan].std.init(ins);
break;
}
case DIV_CMD_NOTE_OFF:
chan[c.chan].active=false;
chan[c.chan].keyOff=true;
@ -159,13 +148,9 @@ int DivPlatformC64::dispatch(DivCommand c) {
}
case DIV_CMD_STD_NOISE_MODE:
chan[c.chan].duty=c.value;
if (c.chan==3) { // noise
chan[c.chan].freqChanged=true;
}
break;
case DIV_CMD_LEGATO:
if (c.chan==3) break;
chan[c.chan].baseFreq=round(FREQ_BASE/pow(2.0f,((float)c.value/12.0f)));
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;
break;

11
src/engine/platform/c64.h
View file

@ -8,9 +8,10 @@
class DivPlatformC64: public DivDispatch {
struct Channel {
int freq, baseFreq, pitch, prevFreq, testWhen;
unsigned char ins, note, duty, sweep;
unsigned char ins, note, sweep, wave;
short duty;
bool active, insChanged, freqChanged, sweepChanged, keyOn, keyOff, inPorta;
signed char vol, outVol, wave;
signed char vol, outVol;
DivMacroInt std;
Channel():
freq(0),
@ -20,8 +21,9 @@ class DivPlatformC64: public DivDispatch {
testWhen(0),
ins(-1),
note(0),
duty(0),
sweep(0),
wave(0),
duty(0),
active(false),
insChanged(true),
freqChanged(false),
@ -29,8 +31,7 @@ class DivPlatformC64: public DivDispatch {
keyOn(false),
keyOff(false),
inPorta(false),
vol(15),
wave(-1) {}
vol(15) {}
};
Channel chan[3];

4
src/engine/playback.cpp
View file

@ -488,7 +488,9 @@ void DivEngine::nextRow() {
for (int i=0; i<chans; i++) {
DivPattern* pat=song.pat[i]->data[curOrder];
if (!(pat->data[curRow][0]==0 && pat->data[curRow][1]==0)) {
dispatchCmd(DivCommand(DIV_CMD_PRE_NOTE,i,ticks));
if (pat->data[curRow][0]!=100) {
dispatchCmd(DivCommand(DIV_CMD_PRE_NOTE,i,ticks));
}
}
}
}