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YM2608-LLE, part 4

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to-do: understand why does CT_maintheme screw up the output
This commit is contained in:
tildearrow 2024-04-26 18:22:16 -05:00
parent 08ac4fe0b1
commit 06aed6dacc
1 changed files with 22 additions and 15 deletions
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25
src/engine/platform/ym2608.cpp
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@ -492,23 +492,29 @@ void DivPlatformYM2608::acquire_ymfm(short** buf, size_t len) {
void DivPlatformYM2608::acquire_lle(short** buf, size_t len) { void DivPlatformYM2608::acquire_lle(short** buf, size_t len) {
for (size_t h=0; h<len; h++) { for (size_t h=0; h<len; h++) {
bool canWeWrite=true;
bool have0=false; bool have0=false;
bool have1=false; bool have1=false;
unsigned char howLong=0; unsigned char howLong=0;
while (true) { while (true) {
bool canWeWrite=fm_lle.prescaler_latch[1]&1;
lastS=fm_lle.o_s; lastS=fm_lle.o_s;
lastSH=fm_lle.o_sh1; lastSH=fm_lle.o_sh1;
lastSH2=fm_lle.o_sh2; lastSH2=fm_lle.o_sh2;
if (canWeWrite) { if (canWeWrite) {
if (delay>0) { if (delay>0) {
if (delay==3) {
delay=0;
} else {
fm_lle.input.cs=0; fm_lle.input.cs=0;
fm_lle.input.rd=0; fm_lle.input.rd=0;
fm_lle.input.wr=1; fm_lle.input.wr=1;
fm_lle.input.a0=0; fm_lle.input.a0=0;
fm_lle.input.a1=0; fm_lle.input.a1=0;
fm_lle.input.data=0;
delay=1; delay=1;
}
} else if (!writes.empty()) { } else if (!writes.empty()) {
QueuedWrite& w=writes.front(); QueuedWrite& w=writes.front();
if (w.addrOrVal) { if (w.addrOrVal) {
@ -521,7 +527,7 @@ void DivPlatformYM2608::acquire_lle(short** buf, size_t len) {
delay=2; delay=2;
//logV("%.3x = %.2x",w.addr,w.val); //logV("%.2x",w.val);
regPool[w.addr&0x1ff]=w.val; regPool[w.addr&0x1ff]=w.val;
writes.pop_front(); writes.pop_front();
@ -535,6 +541,8 @@ void DivPlatformYM2608::acquire_lle(short** buf, size_t len) {
delay=2; delay=2;
//logV("%.2x =",w.addr);
w.addrOrVal=true; w.addrOrVal=true;
} }
} else { } else {
@ -561,8 +569,6 @@ void DivPlatformYM2608::acquire_lle(short** buf, size_t len) {
} }
} }
canWeWrite=false;
if (fm_lle.o_s && !lastS) { if (fm_lle.o_s && !lastS) {
dacVal>>=1; dacVal>>=1;
dacVal|=(fm_lle.o_opo&1)<<23; dacVal|=(fm_lle.o_opo&1)<<23;
@ -586,13 +592,14 @@ void DivPlatformYM2608::acquire_lle(short** buf, size_t len) {
if (have0 && have1) break; if (have0 && have1) break;
// ADPCM data bus // ADPCM data bus
//if (fm_lle.input.!=0) { if (fm_lle.o_dm!=0) {
//logV("%x",fm_lle.input.ad); //logV("%x",fm_lle.o_dm);
//} }
} }
// TODO: o_analog if (howLong!=48) {
if (howLong!=48) logW("NOT 48! %d",howLong); //logW("NOT 48! %d",howLong);
}
// DAC // DAC
int accm1=dacOut[0]-0x4000; int accm1=dacOut[0]-0x4000;