summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/sound/2608intf.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/sound/2608intf.cpp')
-rw-r--r--src/devices/sound/2608intf.cpp205
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 );
-}