// license:BSD-3-Clause // copyright-holders:Ernesto Corvi /****************************************************************************** * 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 "8950intf.h" #include "fmopl.h" void y8950_device::irq_handler(int irq) { m_irq_handler(irq); } void y8950_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { switch(id) { case 0: y8950_timer_over(m_chip,0); break; case 1: y8950_timer_over(m_chip,1); break; } } void y8950_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 y8950_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) { y8950_update_one(m_chip, outputs[0], samples); } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void y8950_device::device_start() { int rate = clock()/72; m_irq_handler.resolve_safe(); m_keyboard_read_handler.resolve_safe(0); m_keyboard_write_handler.resolve_safe(); m_io_read_handler.resolve_safe(0); m_io_write_handler.resolve_safe(); /* stream system initialize */ m_chip = y8950_init(this,clock(),rate); if (!m_chip) throw emu_fatalerror("y8950_device(%s): Error creating Y8950 chip", tag()); /* ADPCM ROM data */ y8950_set_delta_t_memory(m_chip, &y8950_device::static_read_byte, &y8950_device::static_write_byte); m_stream = machine().sound().stream_alloc(*this,0,1,rate); /* port and keyboard handler */ y8950_set_port_handler(m_chip, &y8950_device::static_port_handler_w, &y8950_device::static_port_handler_r, this); y8950_set_keyboard_handler(m_chip, &y8950_device::static_keyboard_handler_w, &y8950_device::static_keyboard_handler_r, this); /* Y8950 setup */ y8950_set_timer_handler (m_chip, &y8950_device::static_timer_handler, this); y8950_set_irq_handler (m_chip, &y8950_device::static_irq_handler, this); y8950_set_update_handler(m_chip, &y8950_device::static_update_request, this); m_timer[0] = timer_alloc(0); m_timer[1] = timer_alloc(1); } //------------------------------------------------- // device_clock_changed //------------------------------------------------- void y8950_device::device_clock_changed() { m_stream->set_sample_rate(clock() / 72); y8950_clock_changed(m_chip, clock(), clock() / 72); } //------------------------------------------------- // device_stop - device-specific stop //------------------------------------------------- void y8950_device::device_stop() { y8950_shutdown(m_chip); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void y8950_device::device_reset() { y8950_reset_chip(m_chip); } //------------------------------------------------- // rom_bank_updated //------------------------------------------------- void y8950_device::rom_bank_updated() { m_stream->update(); } u8 y8950_device::read(offs_t offset) { return y8950_read(m_chip, offset & 1); } void y8950_device::write(offs_t offset, u8 data) { y8950_write(m_chip, offset & 1, data); } u8 y8950_device::status_port_r() { return read(0); } u8 y8950_device::read_port_r() { return read(1); } void y8950_device::control_port_w(u8 data) { write(0, data); } void y8950_device::write_port_w(u8 data) { write(1, data); } DEFINE_DEVICE_TYPE(Y8950, y8950_device, "y8950", "Y8950 MSX-Audio") y8950_device::y8950_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, Y8950, tag, owner, clock) , device_sound_interface(mconfig, *this) , device_rom_interface(mconfig, *this, 21) , m_stream(nullptr) , m_timer{ nullptr, nullptr } , m_chip(nullptr) , m_irq_handler(*this) , m_keyboard_read_handler(*this) , m_keyboard_write_handler(*this) , m_io_read_handler(*this) , m_io_write_handler(*this) { }