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YM2612: fix CSM on ymfm

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finally
This commit is contained in:
tildearrow 2023-02-05 17:42:48 -05:00
parent c665326b2d
commit 26739bba11
3 changed files with 23 additions and 7 deletions
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19
src/engine/platform/genesis.cpp
View file

@ -30,17 +30,26 @@
void DivYM2612Interface::ymfm_set_timer(uint32_t tnum, int32_t duration_in_clocks) {
if (tnum==1) {
countB=duration_in_clocks;
setB=duration_in_clocks;
} else if (tnum==0) {
countA=duration_in_clocks;
setA=duration_in_clocks;
}
//logV("ymfm_set_timer(%d,%d)",tnum,duration_in_clocks);
}
void DivYM2612Interface::clock() {
if (countA>=0) {
if (setA>=0) {
countA-=144;
if (countA<0) m_engine->engine_timer_expired(0);
if (countA<0) {
m_engine->engine_timer_expired(0);
countA+=setA;
}
}
if (setB>=0) {
countB-=144;
if (countB<0) {
m_engine->engine_timer_expired(1);
countB+=setB;
}
}
}

5
src/engine/platform/genesis.h
View file

@ -25,6 +25,7 @@
class DivYM2612Interface: public ymfm::ymfm_interface {
int setA, setB;
int countA, countB;
public:
@ -32,8 +33,8 @@ class DivYM2612Interface: public ymfm::ymfm_interface {
void ymfm_set_timer(uint32_t tnum, int32_t duration_in_clocks);
DivYM2612Interface():
ymfm::ymfm_interface(),
countA(-1),
countB(-1) {}
countA(0),
countB(0) {}
};
class DivPlatformGenesis: public DivPlatformOPN {

6
src/engine/platform/sound/ymfm/ymfm_fm.ipp
View file

@ -431,6 +431,12 @@ bool fm_operator<RegisterType>::prepare()
// clock the key state
clock_keystate(uint32_t(m_keyon_live != 0));
if (m_keyon_live & (1<<KEYON_CSM)) {
if (!(m_keyon_live & (1<<KEYON_NORMAL))) {
clock_keystate(0);
} else {
}
}
m_keyon_live &= ~(1 << KEYON_CSM);
// we're active until we're quiet after the release