/****************************************************************************** * FILE * Yamaha 3812 emulator interface - MAME VERSION * * CREATED BY * Ernesto Corvi * * UPDATE LOG * JB 28-04-2002 Fixed simultaneous usage of all three different chip types. * Used real sample rate when resample filter is active. * AAT 12-28-2001 Protected Y8950 from accessing unmapped port and keyboard handlers. * CHS 1999-01-09 Fixes new ym3812 emulation interface. * CHS 1998-10-23 Mame streaming sound chip update * EC 1998 Created Interface * * NOTES * ******************************************************************************/ #include "emu.h" #include "streams.h" #include "8950intf.h" #include "fm.h" #include "sound/fmopl.h" typedef struct _y8950_state y8950_state; struct _y8950_state { sound_stream * stream; emu_timer * timer[2]; void * chip; const y8950_interface *intf; running_device *device; }; INLINE y8950_state *get_safe_token(running_device *device) { assert(device != NULL); assert(device->token != NULL); assert(device->type == SOUND); assert(sound_get_type(device) == SOUND_Y8950); return (y8950_state *)device->token; } static void IRQHandler(void *param,int irq) { y8950_state *info = (y8950_state *)param; if (info->intf->handler) (info->intf->handler)(info->device, irq ? ASSERT_LINE : CLEAR_LINE); } static TIMER_CALLBACK( timer_callback_0 ) { y8950_state *info = (y8950_state *)ptr; y8950_timer_over(info->chip,0); } static TIMER_CALLBACK( timer_callback_1 ) { y8950_state *info = (y8950_state *)ptr; y8950_timer_over(info->chip,1); } static void TimerHandler(void *param,int c,attotime period) { y8950_state *info = (y8950_state *)param; if( attotime_compare(period, attotime_zero) == 0 ) { /* Reset FM Timer */ timer_enable(info->timer[c], 0); } else { /* Start FM Timer */ timer_adjust_oneshot(info->timer[c], period, 0); } } static unsigned char Y8950PortHandler_r(void *param) { y8950_state *info = (y8950_state *)param; if (info->intf->portread) return info->intf->portread(info->device,0); return 0; } static void Y8950PortHandler_w(void *param,unsigned char data) { y8950_state *info = (y8950_state *)param; if (info->intf->portwrite) info->intf->portwrite(info->device,0,data); } static unsigned char Y8950KeyboardHandler_r(void *param) { y8950_state *info = (y8950_state *)param; if (info->intf->keyboardread) return info->intf->keyboardread(info->device,0); return 0; } static void Y8950KeyboardHandler_w(void *param,unsigned char data) { y8950_state *info = (y8950_state *)param; if (info->intf->keyboardwrite) info->intf->keyboardwrite(info->device,0,data); } static STREAM_UPDATE( y8950_stream_update ) { y8950_state *info = (y8950_state *)param; y8950_update_one(info->chip, outputs[0], samples); } static void _stream_update(void *param, int interval) { y8950_state *info = (y8950_state *)param; stream_update(info->stream); } static DEVICE_START( y8950 ) { static const y8950_interface dummy = { 0 }; y8950_state *info = get_safe_token(device); int rate = device->clock/72; info->intf = device->baseconfig().static_config ? (const y8950_interface *)device->baseconfig().static_config : &dummy; info->device = device; /* stream system initialize */ info->chip = y8950_init(device,device->clock,rate); assert_always(info->chip != NULL, "Error creating Y8950 chip"); /* ADPCM ROM data */ y8950_set_delta_t_memory(info->chip, *device->region, device->region->bytes()); info->stream = stream_create(device,0,1,rate,info,y8950_stream_update); /* port and keyboard handler */ y8950_set_port_handler(info->chip, Y8950PortHandler_w, Y8950PortHandler_r, info); y8950_set_keyboard_handler(info->chip, Y8950KeyboardHandler_w, Y8950KeyboardHandler_r, info); /* Y8950 setup */ y8950_set_timer_handler (info->chip, TimerHandler, info); y8950_set_irq_handler (info->chip, IRQHandler, info); y8950_set_update_handler(info->chip, _stream_update, info); info->timer[0] = timer_alloc(device->machine, timer_callback_0, info); info->timer[1] = timer_alloc(device->machine, timer_callback_1, info); } static DEVICE_STOP( y8950 ) { y8950_state *info = get_safe_token(device); y8950_shutdown(info->chip); } static DEVICE_RESET( y8950 ) { y8950_state *info = get_safe_token(device); y8950_reset_chip(info->chip); } READ8_DEVICE_HANDLER( y8950_r ) { y8950_state *info = get_safe_token(device); return y8950_read(info->chip, offset & 1); } WRITE8_DEVICE_HANDLER( y8950_w ) { y8950_state *info = get_safe_token(device); y8950_write(info->chip, offset & 1, data); } READ8_DEVICE_HANDLER( y8950_status_port_r ) { return y8950_r(device, 0); } READ8_DEVICE_HANDLER( y8950_read_port_r ) { return y8950_r(device, 1); } WRITE8_DEVICE_HANDLER( y8950_control_port_w ) { y8950_w(device, 0, data); } WRITE8_DEVICE_HANDLER( y8950_write_port_w ) { y8950_w(device, 1, data); } /************************************************************************** * Generic get_info **************************************************************************/ DEVICE_GET_INFO( y8950 ) { switch (state) { /* --- the following bits of info are returned as 64-bit signed integers --- */ case DEVINFO_INT_TOKEN_BYTES: info->i = sizeof(y8950_state); break; /* --- the following bits of info are returned as pointers to data or functions --- */ case DEVINFO_FCT_START: info->start = DEVICE_START_NAME( y8950 ); break; case DEVINFO_FCT_STOP: info->stop = DEVICE_STOP_NAME( y8950 ); break; case DEVINFO_FCT_RESET: info->reset = DEVICE_RESET_NAME( y8950 ); break; /* --- the following bits of info are returned as NULL-terminated strings --- */ case DEVINFO_STR_NAME: strcpy(info->s, "Y8950"); 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; } }