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emulator timing fixes, VDP DMA fixes, improved DAC audio

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This commit is contained in:
kub 2020-01-14 23:00:44 +01:00
parent b9bc876c9c
commit 43e1401008
10 changed files with 118 additions and 98 deletions
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17
pico/memory.c
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@ -943,11 +943,11 @@ static int ym2612_write_local(u32 a, u32 d, int is_from_z80)
a &= 3;
if (a == 1 && ym2612.OPN.ST.address == 0x2a) /* DAC data */
{
int scanline = get_scanline(is_from_z80);
//elprintf(EL_STATUS, "%03i -> %03i dac w %08x z80 %i", Pico.snd.dac_line, scanline, d, is_from_z80);
int cycles = is_from_z80 ? z80_cyclesDone() : z80_cycles_from_68k();
//elprintf(EL_STATUS, "%03i dac w %08x z80 %i", cycles, d, is_from_z80);
ym2612.dacout = ((int)d - 0x80) << 6;
if (ym2612.dacen)
PsndDoDAC(scanline);
PsndDoDAC(cycles);
return 0;
}
@ -1029,13 +1029,9 @@ static int ym2612_write_local(u32 a, u32 d, int is_from_z80)
return 0;
}
case 0x2b: { /* DAC Sel (YM2612) */
int scanline = get_scanline(is_from_z80);
if (ym2612.dacen != (d & 0x80)) {
ym2612.dacen = d & 0x80;
Pico.snd.dac_line = scanline;
}
ym2612.dacen = d & 0x80;
#ifdef __GP2X__
if (PicoIn.opt & POPT_EXT_FM) YM2612Write_940(a, d, scanline);
if (PicoIn.opt & POPT_EXT_FM) YM2612Write_940(a, d, get_scanline(is_from_z80));
#endif
return 0;
}
@ -1059,8 +1055,7 @@ static int ym2612_write_local(u32 a, u32 d, int is_from_z80)
break;
}
int scanline = get_scanline(is_from_z80);
PsndDoFM(scanline);
PsndDoFM(get_scanline(is_from_z80));
#ifdef __GP2X__
if (PicoIn.opt & POPT_EXT_FM)
return YM2612Write_940(a, d, get_scanline(is_from_z80));