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// license:???
// copyright-holders:???
/**********************************************************************
Sega Game Gear EXT port emulation
Also known as Gear-to-Gear (or VS, in Japan) cable connector
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************/
#include "ggext.h"
// slot devices
#include "smsctrladp.h"
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
const device_type GG_EXT_PORT = &device_creator<gg_ext_port_device>;
//**************************************************************************
// 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 clock) :
device_t(mconfig, GG_EXT_PORT, "EXT Port", tag, owner, clock, "gg_ext_port", __FILE__),
device_slot_interface(mconfig, *this),
m_th_pin_handler(*this),
m_pixel_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();
m_pixel_handler.resolve_safe(0);
}
UINT8 gg_ext_port_device::port_r()
{
UINT8 data = 0xff;
if (m_device)
data = m_device->peripheral_r();
return data;
}
void gg_ext_port_device::port_w( UINT8 data )
{
if (m_device)
m_device->peripheral_w(data);
}
void gg_ext_port_device::th_pin_w(int state)
{
m_th_pin_handler(state);
}
UINT32 gg_ext_port_device::pixel_r()
{
return m_pixel_handler();
}
//-------------------------------------------------
// SLOT_INTERFACE( gg_ext_port_devices )
//-------------------------------------------------
SLOT_INTERFACE_START( gg_ext_port_devices )
SLOT_INTERFACE("smsctrladp", SMS_CTRL_ADAPTOR)
SLOT_INTERFACE_END
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