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MSM6295: add clock rate flag

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This commit is contained in:
tildearrow 2022-05-23 03:13:22 -05:00
parent 59a722d04a
commit d3edc58cb1
4 changed files with 48 additions and 7 deletions
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24
src/engine/platform/msm6295.cpp
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@ -44,7 +44,7 @@ void DivPlatformMSM6295::acquire(short* bufL, short* bufR, size_t start, size_t
QueuedWrite& w=writes.front();
msm->command_w(w.val);
writes.pop();
delay=64;
delay=32;
}
} else {
delay--;
@ -53,6 +53,11 @@ void DivPlatformMSM6295::acquire(short* bufL, short* bufR, size_t start, size_t
msm->tick();
bufL[h]=msm->out()<<4;
if (++updateOsc>=64) {
updateOsc=0;
// TODO: per-channel osc
}
}
}
@ -295,6 +300,19 @@ void DivPlatformMSM6295::renderSamples() {
}
}
void DivPlatformMSM6295::setFlags(unsigned int flags) {
if (flags&1) {
chipClock=8448000;
} else {
chipClock=8000000;
}
rate=chipClock/((flags&2)?6:24);
for (int i=0; i<4; i++) {
isMuted[i]=false;
oscBuf[i]->rate=rate/22;
}
}
int DivPlatformMSM6295::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
parent=p;
adpcmMem=new unsigned char[getSampleMemCapacity(0)];
@ -303,13 +321,13 @@ int DivPlatformMSM6295::init(DivEngine* p, int channels, int sugRate, unsigned i
iface.sampleBank=0;
dumpWrites=false;
skipRegisterWrites=false;
updateOsc=0;
for (int i=0; i<4; i++) {
isMuted[i]=false;
oscBuf[i]=new DivDispatchOscBuffer;
}
chipClock=8000000;
rate=chipClock/8;
msm=new msm6295_core(iface);
setFlags(flags);
reset();
return 4;
}