mirror of
https://github.com/holub/mame
synced 2025-05-28 08:33:05 +03:00
5563d0dcd6
2203intf.cpp, 2608intf.cpp, 2610intf.cpp, 2612intf.cpp, 262intf.cpp, 3526intf.cpp, 3812intf.cpp, 8950intf.cpp, ym2151.cpp, ym2413.cpp, ymf271.cpp, ymf278b.cpp : Simplified handlers (nw)
145 lines
3.5 KiB
C++
145 lines
3.5 KiB
C++
// license:BSD-3-Clause
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// copyright-holders:Ernesto Corvi
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/***************************************************************************
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262intf.c
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MAME interface for YMF262 (OPL3) emulator
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***************************************************************************/
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#include "emu.h"
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#include "262intf.h"
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#include "ymf262.h"
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/* IRQ Handler */
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void ymf262_device::irq_handler(int irq)
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{
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if (!m_irq_handler.isnull())
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m_irq_handler(irq);
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}
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/* Timer overflow callback from timer.c */
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void ymf262_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
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{
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switch(id)
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{
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case 0:
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ymf262_timer_over(m_chip,0);
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break;
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case 1:
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ymf262_timer_over(m_chip,1);
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break;
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}
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}
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void ymf262_device::timer_handler(int c, const attotime &period)
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{
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if( period == attotime::zero )
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{ /* Reset FM Timer */
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m_timer[c]->enable(false);
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}
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else
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{ /* Start FM Timer */
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m_timer[c]->adjust(period);
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}
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}
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//-------------------------------------------------
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// sound_stream_update - handle a stream update
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//-------------------------------------------------
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void ymf262_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
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{
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ymf262_update_one(m_chip, outputs, samples);
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}
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//-------------------------------------------------
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// device_post_load - device-specific post load
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//-------------------------------------------------
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void ymf262_device::device_post_load()
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{
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ymf262_post_load(m_chip);
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}
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//-------------------------------------------------
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// device_start - device-specific startup
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//-------------------------------------------------
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void ymf262_device::device_start()
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{
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int rate = clock()/288;
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m_irq_handler.resolve();
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/* stream system initialize */
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m_chip = ymf262_init(this,clock(),rate);
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assert_always(m_chip != nullptr, "Error creating YMF262 chip");
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m_stream = machine().sound().stream_alloc(*this,0,4,rate);
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/* YMF262 setup */
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ymf262_set_timer_handler (m_chip, &ymf262_device::static_timer_handler, this);
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ymf262_set_irq_handler (m_chip, &ymf262_device::static_irq_handler, this);
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ymf262_set_update_handler(m_chip, &ymf262_device::static_update_request, this);
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m_timer[0] = timer_alloc(0);
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m_timer[1] = timer_alloc(1);
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}
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//-------------------------------------------------
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// device_stop - device-specific stop
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//-------------------------------------------------
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void ymf262_device::device_stop()
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{
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ymf262_shutdown(m_chip);
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}
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//-------------------------------------------------
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// device_reset - device-specific reset
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//-------------------------------------------------
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void ymf262_device::device_reset()
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{
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ymf262_reset_chip(m_chip);
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}
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//-------------------------------------------------
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// device_clock_changed - called if the clock
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// changes
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//-------------------------------------------------
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void ymf262_device::device_clock_changed()
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{
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int rate = clock()/288;
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ymf262_clock_changed(m_chip,clock(),rate);
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m_stream->set_sample_rate(rate);
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}
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u8 ymf262_device::read(offs_t offset)
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{
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return ymf262_read(m_chip, offset & 3);
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}
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void ymf262_device::write(offs_t offset, u8 data)
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{
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ymf262_write(m_chip, offset & 3, data);
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}
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DEFINE_DEVICE_TYPE(YMF262, ymf262_device, "ymf262", "YMF262 OPL3")
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ymf262_device::ymf262_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: device_t(mconfig, YMF262, tag, owner, clock)
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, device_sound_interface(mconfig, *this)
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, m_stream(nullptr)
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, m_timer{ nullptr, nullptr }
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, m_chip(nullptr)
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, m_irq_handler(*this)
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{
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}
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