#include "emu.h" #include "streams.h" #include "2203intf.h" #include "fm.h" typedef struct _ym2203_state ym2203_state; struct _ym2203_state { sound_stream * stream; emu_timer * timer[2]; void * chip; void * psg; const ym2203_interface *intf; running_device *device; }; INLINE ym2203_state *get_safe_token(running_device *device) { assert(device != NULL); assert(device->type() == YM2203); return (ym2203_state *)downcast(device)->token(); } static void psg_set_clock(void *param, int clock) { ym2203_state *info = (ym2203_state *)param; ay8910_set_clock_ym(info->psg, clock); } static void psg_write(void *param, int address, int data) { ym2203_state *info = (ym2203_state *)param; ay8910_write_ym(info->psg, address, data); } static int psg_read(void *param) { ym2203_state *info = (ym2203_state *)param; return ay8910_read_ym(info->psg); } static void psg_reset(void *param) { ym2203_state *info = (ym2203_state *)param; ay8910_reset_ym(info->psg); } static const ssg_callbacks psgintf = { psg_set_clock, psg_write, psg_read, psg_reset }; /* IRQ Handler */ static void IRQHandler(void *param,int irq) { ym2203_state *info = (ym2203_state *)param; if (info->intf->handler != NULL) (*info->intf->handler)(info->device, irq); } /* Timer overflow callback from timer.c */ static TIMER_CALLBACK( timer_callback_2203_0 ) { ym2203_state *info = (ym2203_state *)ptr; ym2203_timer_over(info->chip,0); } static TIMER_CALLBACK( timer_callback_2203_1 ) { ym2203_state *info = (ym2203_state *)ptr; ym2203_timer_over(info->chip,1); } /* update request from fm.c */ void ym2203_update_request(void *param) { ym2203_state *info = (ym2203_state *)param; stream_update(info->stream); } static void timer_handler(void *param,int c,int count,int clock) { ym2203_state *info = (ym2203_state *)param; if( count == 0 ) { /* Reset FM Timer */ timer_enable(info->timer[c], 0); } else { /* Start FM Timer */ attotime period = attotime_mul(ATTOTIME_IN_HZ(clock), count); if (!timer_enable(info->timer[c], 1)) timer_adjust_oneshot(info->timer[c], period, 0); } } static STREAM_UPDATE( ym2203_stream_update ) { ym2203_state *info = (ym2203_state *)param; ym2203_update_one(info->chip, outputs[0], samples); } static STATE_POSTLOAD( ym2203_intf_postload ) { ym2203_state *info = (ym2203_state *)param; ym2203_postload(info->chip); } static DEVICE_START( ym2203 ) { static const ym2203_interface generic_2203 = { { AY8910_LEGACY_OUTPUT, AY8910_DEFAULT_LOADS, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL }, NULL }; const ym2203_interface *intf = device->baseconfig().static_config() ? (const ym2203_interface *)device->baseconfig().static_config() : &generic_2203; ym2203_state *info = get_safe_token(device); int rate = device->clock()/72; /* ??? */ info->intf = intf; info->device = device; info->psg = ay8910_start_ym(NULL, YM2203, device, device->clock(), &intf->ay8910_intf); assert_always(info->psg != NULL, "Error creating YM2203/AY8910 chip"); /* Timer Handler set */ info->timer[0] = timer_alloc(device->machine, timer_callback_2203_0, info); info->timer[1] = timer_alloc(device->machine, timer_callback_2203_1, info); /* stream system initialize */ info->stream = stream_create(device,0,1,rate,info,ym2203_stream_update); /* Initialize FM emurator */ info->chip = ym2203_init(info,device,device->clock(),rate,timer_handler,IRQHandler,&psgintf); assert_always(info->chip != NULL, "Error creating YM2203 chip"); state_save_register_postload(device->machine, ym2203_intf_postload, info); } static DEVICE_STOP( ym2203 ) { ym2203_state *info = get_safe_token(device); ym2203_shutdown(info->chip); ay8910_stop_ym(info->psg); } static DEVICE_RESET( ym2203 ) { ym2203_state *info = get_safe_token(device); ym2203_reset_chip(info->chip); } READ8_DEVICE_HANDLER( ym2203_r ) { ym2203_state *info = get_safe_token(device); return ym2203_read(info->chip, offset & 1); } WRITE8_DEVICE_HANDLER( ym2203_w ) { ym2203_state *info = get_safe_token(device); ym2203_write(info->chip, offset & 1, data); } READ8_DEVICE_HANDLER( ym2203_status_port_r ) { return ym2203_r(device, 0); } READ8_DEVICE_HANDLER( ym2203_read_port_r ) { return ym2203_r(device, 1); } WRITE8_DEVICE_HANDLER( ym2203_control_port_w ) { ym2203_w(device, 0, data); } WRITE8_DEVICE_HANDLER( ym2203_write_port_w ) { ym2203_w(device, 1, data); } /************************************************************************** * Generic get_info **************************************************************************/ DEVICE_GET_INFO( ym2203 ) { switch (state) { /* --- the following bits of info are returned as 64-bit signed integers --- */ case DEVINFO_INT_TOKEN_BYTES: info->i = sizeof(ym2203_state); break; /* --- the following bits of info are returned as pointers to data or functions --- */ case DEVINFO_FCT_START: info->start = DEVICE_START_NAME( ym2203 ); break; case DEVINFO_FCT_STOP: info->stop = DEVICE_STOP_NAME( ym2203 ); break; case DEVINFO_FCT_RESET: info->reset = DEVICE_RESET_NAME( ym2203 ); break; /* --- the following bits of info are returned as NULL-terminated strings --- */ case DEVINFO_STR_NAME: strcpy(info->s, "YM2203"); break; case DEVINFO_STR_FAMILY: strcpy(info->s, "Yamaha FM"); break; case DEVINFO_STR_VERSION: strcpy(info->s, "1.0"); break; case DEVINFO_STR_SOURCE_FILE: strcpy(info->s, __FILE__); break; case DEVINFO_STR_CREDITS: strcpy(info->s, "Copyright Nicola Salmoria and the MAME Team"); break; } } DEFINE_LEGACY_SOUND_DEVICE(YM2203, ym2203);