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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/**********************************************************************
Sega Game Gear EXT port emulation
Also known as Gear-to-Gear (or VS, in Japan) cable connector
**********************************************************************/
#include "emu.h"
#include "ggext.h"
// slot devices
#include "smsctrladp.h"
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
DEFINE_DEVICE_TYPE(GG_EXT_PORT, gg_ext_port_device, "gg_ext_port", "Game Gear EXT Port")
//**************************************************************************
// CARD INTERFACE
//**************************************************************************
//-------------------------------------------------
// device_gg_ext_port_interface - constructor
//-------------------------------------------------
device_gg_ext_port_interface::device_gg_ext_port_interface(const machine_config &mconfig, device_t &device)
: device_slot_card_interface(mconfig,device)
{
m_port = dynamic_cast<gg_ext_port_device *>(device.owner());
}
//-------------------------------------------------
// ~device_gg_ext_port_interface - destructor
//-------------------------------------------------
device_gg_ext_port_interface::~device_gg_ext_port_interface()
{
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// gg_ext_port_device - constructor
//-------------------------------------------------
gg_ext_port_device::gg_ext_port_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, GG_EXT_PORT, tag, owner, clock),
device_slot_interface(mconfig, *this),
m_device(nullptr),
m_th_pin_handler(*this)
{
}
//-------------------------------------------------
// gg_ext_port_device - destructor
//-------------------------------------------------
gg_ext_port_device::~gg_ext_port_device()
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void gg_ext_port_device::device_start()
{
m_device = dynamic_cast<device_gg_ext_port_interface *>(get_card_device());
m_th_pin_handler.resolve_safe();
}
uint8_t gg_ext_port_device::port_r()
{
uint8_t data = 0xff;
if (m_device)
data = m_device->peripheral_r();
return data;
}
void gg_ext_port_device::port_w( uint8_t data )
{
if (m_device)
m_device->peripheral_w(data);
}
void gg_ext_port_device::th_pin_w(int state)
{
m_th_pin_handler(state);
}
//-------------------------------------------------
// SLOT_INTERFACE( gg_ext_port_devices )
//-------------------------------------------------
void gg_ext_port_devices(device_slot_interface &device)
{
device.option_add("smsctrladp", SMS_CTRL_ADAPTOR);
}
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