// license:BSD-3-Clause // copyright-holders:Ernesto Corvi /*************************************************************************** 2610intf.c The YM2610 emulator supports up to 2 chips. Each chip has the following connections: - Status Read / Control Write A - Port Read / Data Write A - Control Write B - Data Write B ***************************************************************************/ #include "2610intf.h" #include "fm.h" static void psg_set_clock(void *param, int clock) { ym2610_device *ym2610 = (ym2610_device *) param; ym2610->ay_set_clock(clock); } static void psg_write(void *param, int address, int data) { ym2610_device *ym2610 = (ym2610_device *) param; ym2610->ay8910_write_ym(address, data); } static int psg_read(void *param) { ym2610_device *ym2610 = (ym2610_device *) param; return ym2610->ay8910_read_ym(); } static void psg_reset(void *param) { ym2610_device *ym2610 = (ym2610_device *) param; ym2610->ay8910_reset_ym(); } static const ssg_callbacks psgintf = { psg_set_clock, psg_write, psg_read, psg_reset }; /*------------------------- TM2610 -------------------------------*/ /* IRQ Handler */ static void IRQHandler(void *param,int irq) { ym2610_device *ym2610 = (ym2610_device *) param; ym2610->_IRQHandler(irq); } void ym2610_device::_IRQHandler(int irq) { if (!m_irq_handler.isnull()) m_irq_handler(irq); } /* Timer overflow callback from timer.c */ void ym2610_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { switch(id) { case 0: ym2610_timer_over(m_chip,0); break; case 1: ym2610_timer_over(m_chip,1); break; } } static void timer_handler(void *param,int c,int count,int clock) { ym2610_device *ym2610 = (ym2610_device *) param; ym2610->_timer_handler(c, count, clock); } void ym2610_device::_timer_handler(int c,int count,int clock) { if( count == 0 ) { /* Reset FM Timer */ m_timer[c]->enable(false); } else { /* Start FM Timer */ attotime period = attotime::from_hz(clock) * count; if (!m_timer[c]->enable(true)) m_timer[c]->adjust(period); } } /* update request from fm.c */ void ym2610_update_request(void *param) { ym2610_device *ym2610 = (ym2610_device *) param; ym2610->_ym2610_update_request(); } void ym2610_device::_ym2610_update_request() { m_stream->update(); } //------------------------------------------------- // sound_stream_update - handle a stream update //------------------------------------------------- void ym2610_device::stream_generate(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) { ym2610_update_one(m_chip, outputs, samples); } //------------------------------------------------- // sound_stream_update - handle a stream update //------------------------------------------------- void ym2610b_device::stream_generate(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) { ym2610b_update_one(m_chip, outputs, samples); } void ym2610_device::device_post_load() { ym2610_postload(m_chip); } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void ym2610_device::device_start() { ay8910_device::device_start(); int rate = clock()/72; void *pcmbufa,*pcmbufb; int pcmsizea,pcmsizeb; std::string name(tag()); m_irq_handler.resolve(); /* Timer Handler set */ m_timer[0] = timer_alloc(0); m_timer[1] = timer_alloc(1); /* stream system initialize */ m_stream = machine().sound().stream_alloc(*this,0,2,rate, stream_update_delegate(FUNC(ym2610_device::stream_generate),this)); /* setup adpcm buffers */ pcmbufa = region()->base(); pcmsizea = region()->bytes(); name.append(".deltat"); pcmbufb = (void *)(machine().root_device().memregion(name.c_str())->base()); pcmsizeb = machine().root_device().memregion(name.c_str())->bytes(); if (pcmbufb == NULL || pcmsizeb == 0) { pcmbufb = pcmbufa; pcmsizeb = pcmsizea; } /**** initialize YM2610 ****/ m_chip = ym2610_init(this,this,clock(),rate, pcmbufa,pcmsizea,pcmbufb,pcmsizeb, timer_handler,IRQHandler,&psgintf); assert_always(m_chip != NULL, "Error creating YM2610 chip"); } //------------------------------------------------- // device_stop - device-specific stop //------------------------------------------------- void ym2610_device::device_stop() { ym2610_shutdown(m_chip); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void ym2610_device::device_reset() { ym2610_reset_chip(m_chip); } READ8_MEMBER( ym2610_device::read ) { return ym2610_read(m_chip, offset & 3); } WRITE8_MEMBER( ym2610_device::write ) { ym2610_write(m_chip, offset & 3, data); } const device_type YM2610 = &device_creator; ym2610_device::ym2610_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : ay8910_device(mconfig, YM2610, "YM2610", tag, owner, clock, PSG_TYPE_YM, 1, 0, "ym2610", __FILE__), m_irq_handler(*this) { } ym2610_device::ym2610_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) : ay8910_device(mconfig, type, name, tag, owner, clock, PSG_TYPE_YM, 1, 0, shortname, source), m_irq_handler(*this) { } const device_type YM2610B = &device_creator; ym2610b_device::ym2610b_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : ym2610_device(mconfig, YM2610B, "YM2610B", tag, owner, clock, "ym2610b", __FILE__) { }