diff options
Diffstat (limited to 'src/devices/sound/2608intf.cpp')
-rw-r--r-- | src/devices/sound/2608intf.cpp | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/src/devices/sound/2608intf.cpp b/src/devices/sound/2608intf.cpp deleted file mode 100644 index e6f24c7fef0..00000000000 --- a/src/devices/sound/2608intf.cpp +++ /dev/null @@ -1,205 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Ernesto Corvi -/*************************************************************************** - - 2608intf.c - - The YM2608 emulator supports up to 2 chips. - Each chip has the following connections: - - Status Read / Control Write A - - Port Read / Data Write A - - Control Write B - - Data Write B - -***************************************************************************/ - -#include "emu.h" -#include "2608intf.h" -#include "fm.h" - -const ssg_callbacks ym2608_device::psgintf = -{ - &ym2608_device::psg_set_clock, - &ym2608_device::psg_write, - &ym2608_device::psg_read, - &ym2608_device::psg_reset -}; - -/* IRQ Handler */ -void ym2608_device::irq_handler(int irq) -{ - if (!m_irq_handler.isnull()) - m_irq_handler(irq); -} - -/* Timer overflow callback from timer.c */ -void ym2608_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) -{ - switch(id) - { - case 0: - ym2608_timer_over(m_chip,0); - break; - - case 1: - ym2608_timer_over(m_chip,1); - break; - } -} - -void ym2608_device::timer_handler(int c,int count,int clock) -{ - if( count == 0 || clock == 0 ) - { /* Reset FM Timer */ - m_timer[c]->enable(false); - } - else - { /* Start FM Timer */ - attotime period = attotime::from_hz(clock) * count; - - if (!m_timer[c]->enable(true)) - m_timer[c]->adjust(period); - } -} - -//------------------------------------------------- -// sound_stream_update - handle a stream update -//------------------------------------------------- - -void ym2608_device::stream_generate(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) -{ - ym2608_update_one(m_chip, outputs, samples); -} - -void ym2608_device::device_post_load() -{ - ym2608_postload(m_chip); -} - -//------------------------------------------------- -// device_start - device-specific startup -//------------------------------------------------- - -void ym2608_device::device_start() -{ - ay8910_device::device_start(); - - int rate = clock()/72; - - m_irq_handler.resolve(); - - /* Timer Handler set */ - m_timer[0] = timer_alloc(0); - m_timer[1] = timer_alloc(1); - - /* stream system initialize */ - m_stream = machine().sound().stream_alloc(*this,0,2,rate, stream_update_delegate(&ym2608_device::stream_generate,this)); - - /* initialize YM2608 */ - m_chip = ym2608_init(this,clock(),rate, - &ym2608_device::static_internal_read_byte, - &ym2608_device::static_external_read_byte, &ym2608_device::static_external_write_byte, - &ym2608_device::static_timer_handler,&ym2608_device::static_irq_handler,&psgintf); - if (!m_chip) - throw emu_fatalerror("ym2608_device(%s): Error creating YM2608 chip", tag()); -} - -//------------------------------------------------- -// device_clock_changed -//------------------------------------------------- - -void ym2608_device::device_clock_changed() -{ - m_stream->set_sample_rate(clock() / 72); - ym2608_clock_changed(m_chip, clock(), clock() / 72); -} - -//------------------------------------------------- -// device_stop - device-specific stop -//------------------------------------------------- - -void ym2608_device::device_stop() -{ - ym2608_shutdown(m_chip); -} - -//------------------------------------------------- -// device_reset - device-specific reset -//------------------------------------------------- - -void ym2608_device::device_reset() -{ - ym2608_reset_chip(m_chip); -} - -//------------------------------------------------- -// rom_bank_updated -//------------------------------------------------- - -void ym2608_device::rom_bank_updated() -{ - m_stream->update(); -} - - -u8 ym2608_device::read(offs_t offset) -{ - return ym2608_read(m_chip, offset & 3); -} - -void ym2608_device::write(offs_t offset, u8 data) -{ - ym2608_write(m_chip, offset & 3, data); -} - -DEFINE_DEVICE_TYPE(YM2608, ym2608_device, "ym2608", "YM2608 OPNA") - -ym2608_device::ym2608_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) - : ay8910_device(mconfig, YM2608, tag, owner, clock, PSG_TYPE_YM, 1, 2) - , device_rom_interface(mconfig, *this, 21) - , m_stream(nullptr) - , m_timer{ nullptr, nullptr } - , m_chip(nullptr) - , m_irq_handler(*this) - , m_internal(*this, "internal") -{ -} - -ROM_START( ym2608 ) - ROM_REGION( 0x2000, "internal", 0 ) - /* - This data is derived from the chip's output - internal ROM can't be read. - It was verified, using real YM2608, that this ADPCM stream produces 100% correct output signal. - */ - // see YM2608_ADPCM_ROM_addr table in fm.c for current sample offsets - // original offset comments from Jarek: - // offset 0: - /* Source: 01BD.ROM */ - /* Length: 448 / 0x000001C0 */ - // offset 0x1C0: - /* Source: 02SD.ROM */ - /* Length: 640 / 0x00000280 */ - // offset 0x440: - /* Source: 04TOP.ROM */ - /* Length: 5952 / 0x00001740 */ - // offset 0x1B80: - /* Source: 08HH.ROM */ - /* Length: 384 / 0x00000180 */ - // offset 0x1D00 - /* Source: 10TOM.ROM */ - /* Length: 640 / 0x00000280 */ - // offset 0x1F80 - /* Source: 20RIM.ROM */ - /* Length: 128 / 0x00000080 */ - /* while this rom was dumped by output analysis, not decap, it was tested - by playing it back into the chip as an external adpcm sample and produced - an identical dac result. a decap would be nice to verify things 100%, - but there is currently no reason to think this rom dump is incorrect. */ - ROM_LOAD16_WORD( "ym2608_adpcm_rom.bin", 0x0000, 0x2000, CRC(23c9e0d8) SHA1(50b6c3e288eaa12ad275d4f323267bb72b0445df) ) -ROM_END - - -const tiny_rom_entry *ym2608_device::device_rom_region() const -{ - return ROM_NAME( ym2608 ); -} |