etc
/
furnace
mirror of https://github.com/tildearrow/furnace.git
0
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

YM2612: half-working CSM

This commit is contained in:
tildearrow 2022-06-03 15:54:49 -05:00
parent 365e466611
commit 59ba156cdf
1 changed files with 8 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/engine/platform/genesis.cpp
View File

@ -28,7 +28,7 @@ static unsigned char konOffs[6]={
0, 1, 2, 4, 5, 6
};
#define CHIP_DIVIDER 64
#define CHIP_DIVIDER 72
#define CHIP_FREQBASE 9440540
const char* DivPlatformGenesis::getEffectName(unsigned char effect) {
@ -516,16 +516,19 @@ void DivPlatformGenesis::tick(bool sysTick) {
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);
printf("freq: %d\n",wf);
immWrite(0x24,wf>>2);
immWrite(0x25,wf&3);
chan[7].freqChanged=false;
}
if (chan[7].keyOn) {
printf("CSM key on\n");
immWrite(0x27,0x81);
chan[7].keyOn=false;
}
if (chan[7].keyOff) {
printf("CSM key off\n");
immWrite(0x27,0x40);
chan[7].keyOff=false;
}
@ -605,6 +608,8 @@ int DivPlatformGenesis::dispatch(DivCommand c) {
chan[c.chan].macroInit(ins);
chan[c.chan].insChanged=false;
printf("note on CSM\n");
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
chan[c.chan].portaPause=false;