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YMU759: interpret time base correctly

This commit is contained in:
tildearrow 2021-12-11 00:37:22 -05:00
parent 6858742d7b
commit dec100b8aa
1 changed files with 40 additions and 6 deletions
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46
src/engine/playback.cpp
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@ -600,12 +600,22 @@ void DivEngine::nextRow() {
changeOrd=-1;
}
if (speedAB) {
ticks=song.speed2*(song.timeBase+1);
nextSpeed=song.speed1;
if (song.system==DIV_SYSTEM_YMU759) {
if (speedAB) {
ticks=song.speed2;
nextSpeed=song.speed1;
} else {
ticks=song.speed1;
nextSpeed=song.speed2;
}
} else {
ticks=song.speed1*(song.timeBase+1);
nextSpeed=song.speed2;
if (speedAB) {
ticks=song.speed2*(song.timeBase+1);
nextSpeed=song.speed1;
} else {
ticks=song.speed1*(song.timeBase+1);
nextSpeed=song.speed2;
}
}
speedAB=!speedAB;
@ -626,7 +636,31 @@ bool DivEngine::nextTick() {
if (song.customTempo) {
divider=song.hz;
} else {
if (song.pal) {
if (song.system==DIV_SYSTEM_YMU759) {
switch (song.timeBase) {
case 0:
divider=248;
break;
case 1:
divider=210;
break;
case 2:
divider=100;
break;
case 3:
divider=50;
break;
case 4:
divider=25;
break;
case 5:
divider=20;
break;
default:
divider=248;
break;
}
} else if (song.pal) {
divider=60;
} else {
divider=50;