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// license:BSD-3-Clause
// copyright-holders:Chris Hardy
#include "emu.h"
#include "cpu/m6800/m6800.h"
#include "audio/hyprolyb.h"
DEFINE_DEVICE_TYPE(HYPROLYB_ADPCM, hyprolyb_adpcm_device, "hyprolyb_adpcm", "Hyper Olympics Audio")
hyprolyb_adpcm_device::hyprolyb_adpcm_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, HYPROLYB_ADPCM, tag, owner, clock)
, device_sound_interface(mconfig, *this)
, m_audiocpu(*this, ":audiocpu")
, m_soundlatch2(*this, ":soundlatch2")
, m_msm(*this, ":msm")
, m_adpcm_ready(0)
, m_adpcm_busy(0)
, m_vck_ready(0)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void hyprolyb_adpcm_device::device_start()
{
save_item(NAME(m_adpcm_ready)); // only bootlegs
save_item(NAME(m_adpcm_busy));
save_item(NAME(m_vck_ready));
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void hyprolyb_adpcm_device::device_reset()
{
m_adpcm_ready = 0;
m_adpcm_busy = 0;
m_vck_ready = 0;
}
void hyprolyb_adpcm_device::write(uint8_t data)
{
m_soundlatch2->write(data);
m_adpcm_ready = 0x80;
}
uint8_t hyprolyb_adpcm_device::busy_r()
{
return m_adpcm_busy ? 0x10 : 0x00;
}
void hyprolyb_adpcm_device::msm_data_w(uint8_t data)
{
m_msm->data_w(data);
m_adpcm_busy = ~data & 0x80;
}
uint8_t hyprolyb_adpcm_device::msm_vck_r()
{
uint8_t old = m_vck_ready;
m_vck_ready = 0x00;
return old;
}
uint8_t hyprolyb_adpcm_device::ready_r()
{
return m_adpcm_ready;
}
uint8_t hyprolyb_adpcm_device::data_r()
{
m_adpcm_ready = 0x00;
return m_soundlatch2->read();
}
void hyprolyb_adpcm_device::vck_callback( int st )
{
m_vck_ready = 0x80;
}
//-------------------------------------------------
// sound_stream_update_legacy - handle a stream update
//-------------------------------------------------
void hyprolyb_adpcm_device::sound_stream_update_legacy(sound_stream &stream, stream_sample_t const * const *inputs, stream_sample_t * const *outputs, int samples)
{
// should never get here
fatalerror("sound_stream_update_legacy called; not applicable to legacy sound devices\n");
}
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