void sound_init( void )
{
/* Initialize FM chip */
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
/* YM2612 */
YM2612Init();
YM2612Config(config.dac_bits);
YM_Reset = YM2612ResetChip;
YM_Update = YM2612Update;
YM_Write = YM2612Write;
/* chip is running a VCLK / 144 = MCLK / 7 / 144 */
fm_cycles_ratio = 144 * 7;
}
else
{
/* YM2413 */
YM2413Init();
YM_Reset = YM2413ResetChip;
YM_Update = YM2413Update;
YM_Write = YM2413Write;
/* chip is running a ZCLK / 72 = MCLK / 15 / 72 */
fm_cycles_ratio = 72 * 15;
}
/* Initialize PSG chip */
SN76489_Config(0, config.psg_preamp, config.psgBoostNoise, 0xff);
}
SN76489_Context* SN76489_Init( int PSGClockValue, int SamplingRate)
{
int i;
SN76489_Context* chip = (SN76489_Context*)malloc(sizeof(SN76489_Context));
if(chip)
{
chip->dClock=(float)(PSGClockValue & 0x7FFFFFF)/16/SamplingRate;
SN76489_SetMute(chip, MUTE_ALLON);
SN76489_Config(chip, /*MUTE_ALLON,*/ FB_SEGAVDP, SRW_SEGAVDP, 1);
for( i = 0; i <= 3; i++ )
centre_panning(chip->panning[i]);
//SN76489_Reset(chip);
if ((PSGClockValue & 0x80000000) && LastChipInit != NULL)
{
// Activate special NeoGeoPocket Mode
LastChipInit->NgpFlags = 0x80 | 0x00;
chip->NgpFlags = 0x80 | 0x01;
chip->NgpChip2 = LastChipInit;
LastChipInit->NgpChip2 = chip;
LastChipInit = NULL;
}
else
{
chip->NgpFlags = 0x00;
chip->NgpChip2 = NULL;
LastChipInit = chip;
}
}
return chip;
}
int device_start_sn764xx(UINT8 ChipID, int clock, int shiftregwidth, int noisetaps,
int negate, int stereo, int clockdivider, int freq0)
{
sn764xx_state *info;
int rate;
if (ChipID >= MAX_CHIPS)
return 0;
info = &SN764xxData[ChipID];
/* emulator create */
switch(EMU_CORE)
{
case EC_MAME:
rate = sn76496_start(&info->chip, clock, shiftregwidth, noisetaps,
negate, stereo, clockdivider, freq0);
sn76496_freq_limiter(clock & 0x3FFFFFFF, clockdivider, SampleRate);
break;
#ifdef ENABLE_ALL_CORES
case EC_MAXIM:
rate = SampleRate;
info->chip = SN76489_Init(clock, rate);
if (info->chip == NULL)
return 0;
SN76489_Config((SN76489_Context*)info->chip, noisetaps, shiftregwidth, 0);
break;
#endif
}
return rate;
}
int device_start_sn764xx(void **_info, int EMU_CORE, int clock, int SampleRate, int shiftregwidth, int noisetaps,
int negate, int stereo, int clockdivider, int freq0)
{
sn764xx_state *info;
int rate;
#ifdef ENABLE_ALL_CORES
if (EMU_CORE >= 0x02)
EMU_CORE = EC_MAME;
#else
EMU_CORE = EC_MAME;
#endif
info = (sn764xx_state*) calloc(1, sizeof(sn764xx_state));
*_info = (void *) info;
/* emulator create */
info->EMU_CORE = EMU_CORE;
switch(EMU_CORE)
{
case EC_MAME:
rate = sn76496_start(&info->chip, clock, shiftregwidth, noisetaps,
negate, stereo, clockdivider, freq0);
sn76496_freq_limiter(clock & 0x3FFFFFFF, clockdivider, SampleRate);
break;
#ifdef ENABLE_ALL_CORES
case EC_MAXIM:
rate = SampleRate;
info->chip = SN76489_Init(clock, rate);
if (info->chip == NULL)
return 0;
SN76489_Config((SN76489_Context*)info->chip, noisetaps, shiftregwidth, 0);
break;
#endif
}
return rate;
}
