// 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 "8950intf.h" #include "fmopl.h" static void IRQHandler(void *param,int irq) { y8950_device *y8950 = (y8950_device *) param; y8950->_IRQHandler(irq); } void y8950_device::_IRQHandler(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; } } static void timer_handler(void *param, int c, const attotime &period) { y8950_device *y8950 = (y8950_device *) param; y8950->_timer_handler(c, period); } 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); } } static unsigned char Y8950PortHandler_r(void *param) { y8950_device *y8950 = (y8950_device *) param; return y8950->_Y8950PortHandler_r(); } unsigned char y8950_device::_Y8950PortHandler_r() { return m_io_read_handler(0); } static void Y8950PortHandler_w(void *param,unsigned char data) { y8950_device *y8950 = (y8950_device *) param; y8950->_Y8950PortHandler_w(data); } void y8950_device::_Y8950PortHandler_w(unsigned char data) { m_io_write_handler((offs_t)0,data); } static unsigned char Y8950KeyboardHandler_r(void *param) { y8950_device *y8950 = (y8950_device *) param; return y8950->_Y8950KeyboardHandler_r(); } unsigned char y8950_device::_Y8950KeyboardHandler_r() { return m_keyboard_read_handler(0); } static void Y8950KeyboardHandler_w(void *param,unsigned char data) { y8950_device *y8950 = (y8950_device *) param; y8950->_Y8950KeyboardHandler_w(data); } void y8950_device::_Y8950KeyboardHandler_w(unsigned char data) { m_keyboard_write_handler((offs_t)0,data); } //------------------------------------------------- // 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); } static void y8950_update_request(void *param, int interval) { y8950_device *y8950 = (y8950_device *) param; y8950->_y8950_update_request(); } void y8950_device::_y8950_update_request() { m_stream->update(); } //------------------------------------------------- // 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); assert_always(m_chip != nullptr, "Error creating Y8950 chip"); /* ADPCM ROM data */ y8950_set_delta_t_memory(m_chip, m_region->base(), m_region->bytes()); m_stream = machine().sound().stream_alloc(*this,0,1,rate); /* port and keyboard handler */ y8950_set_port_handler(m_chip, Y8950PortHandler_w, Y8950PortHandler_r, this); y8950_set_keyboard_handler(m_chip, Y8950KeyboardHandler_w, Y8950KeyboardHandler_r, this); /* Y8950 setup */ y8950_set_timer_handler (m_chip, timer_handler, this); y8950_set_irq_handler (m_chip, IRQHandler, this); y8950_set_update_handler(m_chip, y8950_update_request, this); m_timer[0] = timer_alloc(0); m_timer[1] = timer_alloc(1); } //------------------------------------------------- // 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); } READ8_MEMBER( y8950_device::read ) { return y8950_read(m_chip, offset & 1); } WRITE8_MEMBER( y8950_device::write ) { y8950_write(m_chip, offset & 1, data); } READ8_MEMBER( y8950_device::status_port_r ) { return read(space, 0); } READ8_MEMBER( y8950_device::read_port_r ) { return read(space, 1); } WRITE8_MEMBER( y8950_device::control_port_w ) { write(space, 0, data); } WRITE8_MEMBER( y8950_device::write_port_w ) { write(space, 1, data); } const device_type Y8950 = &device_creator; y8950_device::y8950_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, Y8950, "Y8950", tag, owner, clock, "y8950", __FILE__), device_sound_interface(mconfig, *this), m_stream(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), m_region(*this, DEVICE_SELF) { } //------------------------------------------------- // device_config_complete - perform any // operations now that the configuration is // complete //------------------------------------------------- void y8950_device::device_config_complete() { }