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// license:BSD-3-Clause
// copyright-holders:R. Belmont
/*********************************************************************
a2echoii.c
Implementation of the Street Electronics Echo II speech card
*********************************************************************/
#include "emu.h"
#include "a2echoii.h"
#include "sound/tms5220.h"
#include "speaker.h"
/***************************************************************************
PARAMETERS
***************************************************************************/
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
DEFINE_DEVICE_TYPE(A2BUS_ECHOII, a2bus_echoii_device, "a2echoii", "Street Electronics Echo II")
#define TMS_TAG "tms5220"
/***************************************************************************
FUNCTION PROTOTYPES
***************************************************************************/
//-------------------------------------------------
// device_add_mconfig - add device configuration
//-------------------------------------------------
MACHINE_CONFIG_START(a2bus_echoii_device::device_add_mconfig)
MCFG_SPEAKER_STANDARD_MONO("echoii")
MCFG_SOUND_ADD(TMS_TAG, TMS5220, 640000) // Note the Echo II card has a "FREQ" potentiometer which can be used to adjust the tms5220's clock frequency; 640khz is the '8khz' value according to the tms5220 datasheet
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "echoii", 1.0)
MACHINE_CONFIG_END
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
a2bus_echoii_device::a2bus_echoii_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, type, tag, owner, clock),
device_a2bus_card_interface(mconfig, *this),
m_tms(*this, TMS_TAG)
{
}
a2bus_echoii_device::a2bus_echoii_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
a2bus_echoii_device(mconfig, A2BUS_ECHOII, tag, owner, clock)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void a2bus_echoii_device::device_start()
{
}
void a2bus_echoii_device::device_reset()
{
}
uint8_t a2bus_echoii_device::read_c0nx(uint8_t offset)
{
switch (offset)
{
case 0:
return 0x1f | m_tms->status_r();
}
return 0;
}
void a2bus_echoii_device::write_c0nx(uint8_t offset, uint8_t data)
{
switch (offset)
{
case 0:
m_tms->data_w(data);
break;
}
}
bool a2bus_echoii_device::take_c800()
{
return false;
}
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