// license:BSD-3-Clause
// copyright-holders:Ernesto Corvi
/***************************************************************************
2610intf.c
The YM2610 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 "2610intf.h"
#include "fm.h"
char const *const ym2610_device::YM2610_TAG = "ymsnd";
char const *const ym2610_device::YM2610_DELTAT_TAG = "ymsnd.deltat";
const ssg_callbacks ym2610_device::psgintf =
{
&ym2610_device::psg_set_clock,
&ym2610_device::psg_write,
&ym2610_device::psg_read,
&ym2610_device::psg_reset
};
void ym2610_device::irq_handler(int irq)
{
if (!m_irq_handler.isnull())
m_irq_handler(irq);
}
/* Timer overflow callback from timer.c */
void ym2610_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch(id)
{
case 0:
ym2610_timer_over(m_chip,0);
break;
case 1:
ym2610_timer_over(m_chip,1);
break;
}
}
void ym2610_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 ym2610_device::stream_generate(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
{
ym2610_update_one(m_chip, outputs, samples);
}
//-------------------------------------------------
// sound_stream_update - handle a stream update
//-------------------------------------------------
void ym2610b_device::stream_generate(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
{
ym2610b_update_one(m_chip, outputs, samples);
}
void ym2610_device::device_post_load()
{
ym2610_postload(m_chip);
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void ym2610_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(&ym2610_device::stream_generate,this));
/* setup adpcm buffers */
void *pcmbufa = m_region->base();
int pcmsizea = m_region->bytes();
std::string name = tag() + std::string(".deltat");
memory_region *deltat_region = machine().root_device().memregion(name.c_str());
void *pcmbufb = pcmbufa;
int pcmsizeb = pcmsizea;
if (deltat_region != nullptr && deltat_region->base() != nullptr && deltat_region->bytes() != 0)
{
pcmbufb = deltat_region->base();
pcmsizeb = deltat_region->bytes();
}
/**** initialize YM2610 ****/
m_chip = ym2610_init(this,clock(),rate,
pcmbufa,pcmsizea,pcmbufb,pcmsizeb,
&ym2610_device::static_timer_handler,&ym2610_device::static_irq_handler,&psgintf);
assert_always(m_chip != nullptr, "Error creating YM2610 chip");
}
//-------------------------------------------------
// device_clock_changed
//-------------------------------------------------
void ym2610_device::device_clock_changed()
{
m_stream->set_sample_rate(clock() / 72);
ym2610_clock_changed(m_chip, clock(), clock() / 72);
}
//-------------------------------------------------
// device_stop - device-specific stop
//-------------------------------------------------
void ym2610_device::device_stop()
{
ym2610_shutdown(m_chip);
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void ym2610_device::device_reset()
{
ym2610_reset_chip(m_chip);
}
READ8_MEMBER( ym2610_device::read )
{
return ym2610_read(m_chip, offset & 3);
}
WRITE8_MEMBER( ym2610_device::write )
{
ym2610_write(m_chip, offset & 3, data);
}
DEFINE_DEVICE_TYPE(YM2610, ym2610_device, "ym2610", "YM2610 OPNB")
ym2610_device::ym2610_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: ym2610_device(mconfig, YM2610, tag, owner, clock)
{
}
ym2610_device::ym2610_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
: ay8910_device(mconfig, type, tag, owner, clock, PSG_TYPE_YM, 1, 0)
, m_stream(nullptr)
, m_timer{ nullptr, nullptr }
, m_irq_handler(*this)
, m_region(*this, DEVICE_SELF)
{
}
DEFINE_DEVICE_TYPE(YM2610B, ym2610b_device, "ym2610b", "YM2610B OPNB")
ym2610b_device::ym2610b_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: ym2610_device(mconfig, YM2610B, tag, owner, clock)
{
}