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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/***********************************************************************************************************
Bally Astrocade Expansion port
***********************************************************************************************************/
#include "emu.h"
#include "exp.h"
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
DEFINE_DEVICE_TYPE(ASTROCADE_EXP_SLOT, astrocade_exp_device, "astrocade_exp", "Bally Astrocade expansion")
device_astrocade_exp_interface::device_astrocade_exp_interface(const machine_config &mconfig, device_t &device) :
device_interface(device, "astrocadeexp")
{
}
device_astrocade_exp_interface::~device_astrocade_exp_interface()
{
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// astrocade_exp_device - constructor
//-------------------------------------------------
astrocade_exp_device::astrocade_exp_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) :
device_t(mconfig, ASTROCADE_EXP_SLOT, tag, owner, clock),
device_single_card_slot_interface<device_astrocade_exp_interface>(mconfig, *this),
m_card_mounted(false), m_card(nullptr)
{
}
//-------------------------------------------------
// astrocade_exp_device - destructor
//-------------------------------------------------
astrocade_exp_device::~astrocade_exp_device()
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void astrocade_exp_device::device_start()
{
m_card = get_card_device();
if (m_card)
m_card_mounted = true;
}
/*-------------------------------------------------
read
-------------------------------------------------*/
uint8_t astrocade_exp_device::read(offs_t offset)
{
if (m_card)
return m_card->read(offset);
else
return 0xff;
}
uint8_t astrocade_exp_device::read_io(offs_t offset)
{
if (m_card)
return m_card->read_io(offset);
else
return 0xff;
}
/*-------------------------------------------------
write
-------------------------------------------------*/
void astrocade_exp_device::write(offs_t offset, uint8_t data)
{
if (m_card)
m_card->write(offset, data);
}
void astrocade_exp_device::write_io(offs_t offset, uint8_t data)
{
if (m_card)
m_card->write_io(offset, data);
}
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