int YM2203_sh_start(const struct MachineSound *msound)
{
int i;
if (AY8910_sh_start_ym(msound)) return 1;
intf = msound->sound_interface;
/* Timer Handler set */
FMTimerInit();
/* stream system initialize */
for (i = 0;i < intf->num;i++)
{
int volume;
char name[20];
sprintf(name,"%s #%d FM",sound_name(msound),i);
volume = intf->mixing_level[i]>>16; /* high 16 bit */
stream[i] = stream_init(name,volume,Machine->sample_rate,i,YM2203UpdateOne/*YM2203UpdateCallback*/);
}
/* Initialize FM emurator */
if (YM2203Init(intf->num,intf->baseclock,Machine->sample_rate,TimerHandler,IRQHandler) == 0)
{
/* Ready */
return 0;
}
/* error */
/* stream close */
return 1;
}
static void *ym2203_start(int sndindex, int clock, const void *config)
{
static const struct YM2203interface generic_2203 = { 0 };
const struct YM2203interface *intf = config ? config : &generic_2203;
struct ym2203_info *info;
info = auto_malloc(sizeof(*info));
memset(info, 0, sizeof(*info));
info->intf = intf;
info->psg = ay8910_start_ym(SOUND_YM2203, sndindex, clock, 3, intf->portAread, intf->portBread, intf->portAwrite, intf->portBwrite);
if (!info->psg) return NULL;
/* Timer Handler set */
info->timer[0] = timer_alloc_ptr(timer_callback_2203_0, info);
info->timer[1] = timer_alloc_ptr(timer_callback_2203_1, info);
/* stream system initialize */
info->stream = stream_create(0,1,Machine->sample_rate,info,ym2203_stream_update);
/* Initialize FM emurator */
info->chip = YM2203Init(info,sndindex,clock,Machine->sample_rate,TimerHandler,IRQHandler,&psgintf);
state_save_register_func_postload_ptr(ym2203_postload, info);
if (info->chip)
return info;
/* error */
/* stream close */
return NULL;
}
static void *ym2203_start(int sndindex, int clock, const void *config)
{
static const struct YM2203interface generic_2203 =
{
{
AY8910_LEGACY_OUTPUT,
AY8910_DEFAULT_LOADS,
NULL, NULL, NULL, NULL
},
NULL
};
const struct YM2203interface *intf = config ? config : &generic_2203;
struct ym2203_info *info;
int rate = clock/72; /* ??? */
info = auto_malloc(sizeof(*info));
memset(info, 0, sizeof(*info));
info->intf = intf;
info->psg = ay8910_start_ym(SOUND_YM2203, sndindex, clock, &intf->ay8910_intf);
if (!info->psg) return NULL;
/* Timer Handler set */
info->timer[0] = timer_alloc(timer_callback_2203_0, info);
info->timer[1] = timer_alloc(timer_callback_2203_1, info);
/* stream system initialize */
info->stream = stream_create(0,1,rate,info,ym2203_stream_update);
/* Initialize FM emurator */
info->chip = YM2203Init(info,sndindex,clock,rate,timer_handler,IRQHandler,&psgintf);
state_save_register_postload(Machine, ym2203_postload, info);
if (info->chip)
return info;
/* error */
/* stream close */
return NULL;
}
C_Ym2203Chip::C_Ym2203Chip()
{
chip = YM2203Init(YM2203_CHIP_CLOCK, YM2203_SND_FQ);
for (int i = 0; i < 0x100; i++) regs[i] = 0;
Reset();
}
