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FDS: prepare for auto mod

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This commit is contained in:
tildearrow 2024-08-02 02:21:44 -05:00
parent 0fd72afeb4
commit f50911ea49
5 changed files with 15 additions and 1 deletions
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6
src/engine/platform/fds.cpp
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@ -342,6 +342,12 @@ int DivPlatformFDS::dispatch(DivCommand c) {
rWrite(0x4087,chan[c.chan].modFreq>>8);
break;
}
case DIV_CMD_FDS_MOD_AUTO:
chan[c.chan].autoModNum=c.value>>4;
chan[c.chan].autoModDen=c.value&15;
chan[c.chan].freqChanged=true;
chan[c.chan].modOn=(chan[c.chan].autoModNum || chan[c.chan].autoModDen);
break;
case DIV_CMD_NOTE_PORTA: {
int destFreq=NOTE_FREQUENCY(c.value2);
bool return2=false;

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

@ -29,6 +29,7 @@ class DivPlatformFDS: public DivDispatch {
struct Channel: public SharedChannel<signed char> {
int prevFreq, modFreq;
unsigned char duty, sweep, modDepth, modPos;
unsigned char autoModNum, autoModDen;
bool sweepChanged, modOn;
signed short wave;
signed char modTable[32];
@ -40,6 +41,8 @@ class DivPlatformFDS: public DivDispatch {
sweep(8),
modDepth(0),
modPos(0),
autoModNum(0),
autoModDen(0),
sweepChanged(false),
modOn(false),
wave(-1) {