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Diffstat (limited to 'src/devices/sound/3812intf.cpp')
-rw-r--r-- | src/devices/sound/3812intf.cpp | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/src/devices/sound/3812intf.cpp b/src/devices/sound/3812intf.cpp deleted file mode 100644 index c5f5aeabb05..00000000000 --- a/src/devices/sound/3812intf.cpp +++ /dev/null @@ -1,161 +0,0 @@ -// 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 "3812intf.h" -#include "sound/fmopl.h" - - -void ym3812_device::irq_handler(int irq) -{ - m_timer[2]->adjust(attotime::zero, irq); -} - -/* Timer overflow callback from timer.c */ -void ym3812_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) -{ - switch(id) - { - case TIMER_A: - ym3812_timer_over(m_chip,0); - break; - - case TIMER_B: - ym3812_timer_over(m_chip,1); - break; - - case TIMER_IRQ_SYNC: - if (!m_irq_handler.isnull()) - m_irq_handler(param); - break; - } -} - -void ym3812_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 ym3812_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) -{ - ym3812_update_one(m_chip, outputs[0], samples); -} - -//------------------------------------------------- -// device_start - device-specific startup -//------------------------------------------------- - -void ym3812_device::device_start() -{ - int rate = clock() / 72; - - m_irq_handler.resolve(); - - /* stream system initialize */ - m_chip = ym3812_init(this, clock(), rate); - if (!m_chip) - throw emu_fatalerror("ym3812_device(%s): Error creating YM3812 chip", tag()); - - calculate_rates(); - - /* YM3812 setup */ - ym3812_set_timer_handler (m_chip, ym3812_device::static_timer_handler, this); - ym3812_set_irq_handler (m_chip, ym3812_device::static_irq_handler, this); - ym3812_set_update_handler(m_chip, ym3812_device::static_update_request, this); - - m_timer[0] = timer_alloc(TIMER_A); - m_timer[1] = timer_alloc(TIMER_B); - m_timer[2] = timer_alloc(TIMER_IRQ_SYNC); -} - -void ym3812_device::device_clock_changed() -{ - calculate_rates(); - ym3812_clock_changed(m_chip, clock(), clock() / 72); -} - -void ym3812_device::calculate_rates() -{ - int rate = clock() / 72; - - if (m_stream != nullptr) - m_stream->set_sample_rate(rate); - else - m_stream = machine().sound().stream_alloc(*this, 0, 1, rate); -} - -//------------------------------------------------- -// device_stop - device-specific stop -//------------------------------------------------- - -void ym3812_device::device_stop() -{ - ym3812_shutdown(m_chip); -} - -//------------------------------------------------- -// device_reset - device-specific reset -//------------------------------------------------- - -void ym3812_device::device_reset() -{ - ym3812_reset_chip(m_chip); -} - - -u8 ym3812_device::read(offs_t offset) -{ - return ym3812_read(m_chip, offset & 1); -} - -void ym3812_device::write(offs_t offset, u8 data) -{ - ym3812_write(m_chip, offset & 1, data); -} - -u8 ym3812_device::status_port_r() { return read(0); } -u8 ym3812_device::read_port_r() { return read(1); } -void ym3812_device::control_port_w(u8 data) { write(0, data); } -void ym3812_device::write_port_w(u8 data) { write(1, data); } - - -DEFINE_DEVICE_TYPE(YM3812, ym3812_device, "ym3812", "YM3812 OPL2") - -ym3812_device::ym3812_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) - : device_t(mconfig, YM3812, tag, owner, clock) - , device_sound_interface(mconfig, *this) - , m_stream(nullptr) - , m_timer{ nullptr, nullptr } - , m_chip(nullptr) - , m_irq_handler(*this) -{ -} |