summaryrefslogblamecommitdiffstatshomepage
path: root/src/mame/audio/hyprolyb.cpp
blob: 6f52a35727b9fe9e1e15070edce90a18d7ef8c9b (plain) (tree)
1
2
3
4
5
6
7
8
9
                       
                                

                            

                           
                                                                                                   
 
                                                                                                                             

                                                              
                                        
                                              
                              


                          
 

 
 


                                                   
 
                                          
 







                                                         
 




                                          

 
                                             
 
                                   
                             

 
                                             
 
                                          

 
                                                  
 
                                
                                    

 
                                                
 
                                  
                           


                   
                                              
 
                             

 
                                             
 
                             
                                     

 
                                                  
 
                           

 








                                                                                                                                       
// 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;
}

WRITE8_MEMBER( hyprolyb_adpcm_device::write )
{
	m_soundlatch2->write(data);
	m_adpcm_ready = 0x80;
}

READ8_MEMBER( hyprolyb_adpcm_device::busy_r )
{
	return m_adpcm_busy ? 0x10 : 0x00;
}

WRITE8_MEMBER( hyprolyb_adpcm_device::msm_data_w )
{
	m_msm->write_data(data);
	m_adpcm_busy = ~data & 0x80;
}

READ8_MEMBER( hyprolyb_adpcm_device::msm_vck_r )
{
	uint8_t old = m_vck_ready;
	m_vck_ready = 0x00;
	return old;
}

READ8_MEMBER( hyprolyb_adpcm_device::ready_r )
{
	return m_adpcm_ready;
}

READ8_MEMBER( 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 - handle a stream update
//-------------------------------------------------

void hyprolyb_adpcm_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
{
	// should never get here
	fatalerror("sound_stream_update called; not applicable to legacy sound devices\n");
}