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YM2612: implement urgent flag on ymfm and LLE

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issue #2475
This commit is contained in:
tildearrow 2025-06-18 02:51:14 -05:00
parent f0207011da
commit a36d78305a
1 changed files with 140 additions and 116 deletions
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28
src/engine/platform/genesis.cpp
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@ -256,8 +256,9 @@ void DivPlatformGenesis::acquire_ymfm(short** buf, size_t len) {
if (delay>0) delay--; if (delay>0) delay--;
os[0]=0; os[1]=0; os[0]=0; os[1]=0;
if (delay<=0 && !writes.empty()) { if (!writes.empty()) {
QueuedWrite& w=writes.front(); QueuedWrite& w=writes.front();
if (delay<=0 || w.urgent) {
if (w.addr==0xfffffffe) { if (w.addr==0xfffffffe) {
delay=w.val; delay=w.val;
} else { } else {
@ -276,6 +277,17 @@ void DivPlatformGenesis::acquire_ymfm(short** buf, size_t len) {
canWriteDAC=writes.empty(); canWriteDAC=writes.empty();
} }
} }
} else {
if (dacWrite>=0) {
if (!canWriteDAC) {
canWriteDAC=true;
} else {
urgentWrite(0x2a,dacWrite);
dacWrite=-1;
canWriteDAC=writes.empty();
}
}
}
} else { } else {
canWriteDAC=true; canWriteDAC=true;
if (dacWrite>=0) { if (dacWrite>=0) {
@ -414,8 +426,9 @@ void DivPlatformGenesis::acquire_nuked276(short** buf, size_t len) {
if (delay>0) delay--; if (delay>0) delay--;
if (delay<=0 && !writes.empty()) { if (!writes.empty()) {
QueuedWrite& w=writes.front(); QueuedWrite& w=writes.front();
if (delay<=0 || w.urgent) {
if (w.addr==0xfffffffe) { if (w.addr==0xfffffffe) {
delay=w.val; delay=w.val;
writes.pop_front(); writes.pop_front();
@ -564,6 +577,17 @@ void DivPlatformGenesis::acquire_nuked276(short** buf, size_t len) {
} else { } else {
w.addrOrVal=true; w.addrOrVal=true;
} }
} else {
if (dacWrite>=0) {
if (!canWriteDAC) {
canWriteDAC=true;
} else {
urgentWrite(0x2a,dacWrite);
dacWrite=-1;
canWriteDAC=writes.empty();
}
}
}
} else { } else {
canWriteDAC=true; canWriteDAC=true;
if (dacWrite>=0) { if (dacWrite>=0) {