// 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 "emu.h" #include "2610intf.h" #include "fm.h" char const *const ym2610_device::YM2610_TAG = "ymsnd"; char const *const ym2610_device::YM2610_DELTAT_TAG = "ymsnd.deltat"; const ssg_callbacks ym2610_device::psgintf = { &ym2610_device::psg_set_clock, &ym2610_device::psg_write, &ym2610_device::psg_read, &ym2610_device::psg_reset }; void ym2610_device::irq_handler(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; } } 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); } } //------------------------------------------------- // 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; 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(&ym2610_device::stream_generate,this)); /* setup adpcm buffers */ void *pcmbufa = m_region->base(); int pcmsizea = m_region->bytes(); std::string name = tag() + std::string(".deltat"); memory_region *deltat_region = machine().root_device().memregion(name.c_str()); void *pcmbufb = pcmbufa; int pcmsizeb = pcmsizea; if (deltat_region != nullptr && deltat_region->base() != nullptr && deltat_region->bytes() != 0) { pcmbufb = deltat_region->base(); pcmsizeb = deltat_region->bytes(); } /**** initialize YM2610 ****/ m_chip = ym2610_init(this,clock(),rate, pcmbufa,pcmsizea,pcmbufb,pcmsizeb, &ym2610_device::static_timer_handler,&ym2610_device::static_irq_handler,&psgintf); assert_always(m_chip != nullptr, "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); } DEFINE_DEVICE_TYPE(YM2610, ym2610_device, "ym2610", "YM2610 OPNB") ym2610_device::ym2610_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : ym2610_device(mconfig, YM2610, tag, owner, clock) { } ym2610_device::ym2610_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) : ay8910_device(mconfig, type, tag, owner, clock, PSG_TYPE_YM, 1, 0) , m_stream(nullptr) , m_timer{ nullptr, nullptr } , m_irq_handler(*this) , m_region(*this, DEVICE_SELF) { } DEFINE_DEVICE_TYPE(YM2610B, ym2610b_device, "ym2610b", "YM2610B OPNB") ym2610b_device::ym2610b_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : ym2610_device(mconfig, YM2610B, tag, owner, clock) { }