// license:BSD-3-Clause // copyright-holders:Ernesto Corvi /*************************************************************************** 262intf.c MAME interface for YMF262 (OPL3) emulator ***************************************************************************/ #include "emu.h" #include "262intf.h" #include "ymf262.h" /* IRQ Handler */ void ymf262_device::irq_handler(int irq) { if (!m_irq_handler.isnull()) m_irq_handler(irq); } /* Timer overflow callback from timer.c */ void ymf262_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { switch(id) { case 0: ymf262_timer_over(m_chip,0); break; case 1: ymf262_timer_over(m_chip,1); break; } } void ymf262_device::timer_handler(int c, const attotime &period) { if( period == attotime::zero ) { /* Reset FM Timer */ m_timer[c]->enable(false); } else { /* Start FM Timer */ m_timer[c]->adjust(period); } } //------------------------------------------------- // sound_stream_update - handle a stream update //------------------------------------------------- void ymf262_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) { ymf262_update_one(m_chip, outputs, samples); } //------------------------------------------------- // device_post_load - device-specific post load //------------------------------------------------- void ymf262_device::device_post_load() { ymf262_post_load(m_chip); } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void ymf262_device::device_start() { int rate = clock()/288; m_irq_handler.resolve(); /* stream system initialize */ m_chip = ymf262_init(this,clock(),rate); assert_always(m_chip != nullptr, "Error creating YMF262 chip"); m_stream = machine().sound().stream_alloc(*this,0,4,rate); /* YMF262 setup */ ymf262_set_timer_handler (m_chip, &ymf262_device::static_timer_handler, this); ymf262_set_irq_handler (m_chip, &ymf262_device::static_irq_handler, this); ymf262_set_update_handler(m_chip, &ymf262_device::static_update_request, this); m_timer[0] = timer_alloc(0); m_timer[1] = timer_alloc(1); } //------------------------------------------------- // device_stop - device-specific stop //------------------------------------------------- void ymf262_device::device_stop() { ymf262_shutdown(m_chip); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void ymf262_device::device_reset() { ymf262_reset_chip(m_chip); } //------------------------------------------------- // device_clock_changed - called if the clock // changes //------------------------------------------------- void ymf262_device::device_clock_changed() { int rate = clock()/288; ymf262_clock_changed(m_chip,clock(),rate); m_stream->set_sample_rate(rate); } READ8_MEMBER( ymf262_device::read ) { return ymf262_read(m_chip, offset & 3); } WRITE8_MEMBER( ymf262_device::write ) { ymf262_write(m_chip, offset & 3, data); } DEFINE_DEVICE_TYPE(YMF262, ymf262_device, "ymf262", "YMF262 OPL3") ymf262_device::ymf262_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, YMF262, tag, owner, clock) , device_sound_interface(mconfig, *this) , m_stream(nullptr) , m_timer{ nullptr, nullptr } , m_chip(nullptr) , m_irq_handler(*this) { }