// license:BSD-3-Clause // copyright-holders:Ernesto Corvi /*************************************************************************** 2612intf.c The YM2612 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 "2612intf.h" #include "fm.h" /*------------------------- TM2612 -------------------------------*/ /* IRQ Handler */ static void IRQHandler(void *param,int irq) { ym2612_device *ym2612 = (ym2612_device *) param; ym2612->_IRQHandler(irq); } void ym2612_device::_IRQHandler(int irq) { if (!m_irq_handler.isnull()) m_irq_handler(irq); } /* Timer overflow callback from timer.c */ void ym2612_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { switch(id) { case 0: ym2612_timer_over(m_chip,0); break; case 1: ym2612_timer_over(m_chip,1); break; } } static void timer_handler(void *param,int c,int count,int clock) { ym2612_device *ym2612 = (ym2612_device *) param; ym2612->_timer_handler(c, count, clock); } void ym2612_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 ym2612_update_request(void *param) { ym2612_device *ym2612 = (ym2612_device *) param; ym2612->_ym2612_update_request(); } void ym2612_device::_ym2612_update_request() { m_stream->update(); } //------------------------------------------------- // sound_stream_update - handle a stream update //------------------------------------------------- void ym2612_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) { ym2612_update_one(m_chip, outputs, samples); } void ym2612_device::device_post_load() { ym2612_postload(m_chip); } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void ym2612_device::device_start() { int rate = clock()/72; m_irq_handler.resolve(); /* FM init */ /* 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); /**** initialize YM2612 ****/ m_chip = ym2612_init(this,this,clock(),rate,timer_handler,IRQHandler); assert_always(m_chip != nullptr, "Error creating YM2612 chip"); } //------------------------------------------------- // device_stop - device-specific stop //------------------------------------------------- void ym2612_device::device_stop() { ym2612_shutdown(m_chip); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void ym2612_device::device_reset() { ym2612_reset_chip(m_chip); } READ8_MEMBER( ym2612_device::read ) { return ym2612_read(m_chip, offset & 3); } WRITE8_MEMBER( ym2612_device::write ) { ym2612_write(m_chip, offset & 3, data); } const device_type YM2612 = &device_creator; ym2612_device::ym2612_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, YM2612, "YM2612", tag, owner, clock, "ym2612", __FILE__), device_sound_interface(mconfig, *this), m_irq_handler(*this) { } ym2612_device::ym2612_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) : device_t(mconfig, type, name, tag, owner, clock, shortname, source), device_sound_interface(mconfig, *this), m_irq_handler(*this) { } //------------------------------------------------- // device_config_complete - perform any // operations now that the configuration is // complete //------------------------------------------------- void ym2612_device::device_config_complete() { } const device_type YM3438 = &device_creator; ym3438_device::ym3438_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : ym2612_device(mconfig, YM3438, "YM3438", tag, owner, clock, "ym3438", __FILE__) { }