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sms: do psg like md does

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This commit is contained in:
notaz 2017-10-22 00:39:43 +03:00
parent eef77d7a8b
commit 075672bf9f
2 changed files with 14 additions and 11 deletions
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14
pico/sms.c
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@ -8,10 +8,8 @@
/*
* TODO:
* - start in a state as if BIOS ran
* - remaining status flags (OVR/COL)
* - RAM support in mapper
* - region support
* - SN76496 DAC-like usage
* - H counter
*/
#include "pico_int.h"
@ -133,7 +131,8 @@ static void z80_sms_out(unsigned short a, unsigned char d)
case 0x40:
case 0x41:
if (PicoIn.opt & POPT_EN_PSG)
if ((d & 0x90) == 0x90 && PsndPsgLine < Pico.m.scanline)
PsndDoPSG(Pico.m.scanline);
SN76496Write(d);
break;
@ -300,12 +299,16 @@ void PicoFrameMS(void)
}
}
// 224 because of how it's done for MD...
if (y == 224 && PsndOut)
PsndGetSamplesMS();
cycles_aim += cycles_line;
cycles_done += z80_run((cycles_aim - cycles_done) >> 8) << 8;
}
if (PsndOut)
PsndGetSamplesMS();
if (PsndOut && PsndPsgLine < lines)
PsndDoPSG(lines - 1);
}
void PicoFrameDrawOnlyMS(void)
@ -319,3 +322,4 @@ void PicoFrameDrawOnlyMS(void)
PicoLineMode4(y);
}
// vim:ts=2:sw=2:expandtab

9
pico/sound/sound.c
View file

@ -370,15 +370,12 @@ PICO_INTERNAL void PsndGetSamples(int y)
PICO_INTERNAL void PsndGetSamplesMS(void)
{
int stereo = (PicoIn.opt & 8) >> 3;
int length = PsndLen_use;
// PSG
if (PicoIn.opt & POPT_EN_PSG)
SN76496Update(PsndOut, length, stereo);
PsndDoPSG(223);
// upmix to "stereo" if needed
if (stereo) {
if (PicoIn.opt & POPT_EN_STEREO) {
int i, *p;
for (i = length, p = (void *)PsndOut; i > 0; i--, p++)
*p |= *p << 16;
@ -387,6 +384,8 @@ PICO_INTERNAL void PsndGetSamplesMS(void)
if (PicoWriteSound != NULL)
PicoWriteSound(length * ((PicoIn.opt & POPT_EN_STEREO) ? 4 : 2));
PsndClear();
dac_info[224] = 0;
}
// vim:shiftwidth=2:ts=2:expandtab