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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
**********************************************************************
**********************************************************************/
#pragma once
#ifndef __GG_EXT_PORT__
#define __GG_EXT_PORT__
#include "emu.h"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_GG_EXT_PORT_ADD(_tag, _slot_intf, _def_slot) \
MCFG_DEVICE_ADD(_tag, GG_EXT_PORT, 0) \
MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, false)
#define MCFG_GG_EXT_PORT_MODIFY(_tag) \
MCFG_DEVICE_MODIFY(_tag)
#define MCFG_GG_EXT_PORT_TH_INPUT_HANDLER(_devcb) \
devcb = &gg_ext_port_device::set_th_input_handler(*device, DEVCB_##_devcb);
#define MCFG_GG_EXT_PORT_PIXEL_HANDLER(_devcb) \
devcb = &gg_ext_port_device::set_pixel_handler(*device, DEVCB_##_devcb);
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> gg_ext_port_device
class device_gg_ext_port_interface;
class gg_ext_port_device : public device_t,
public device_slot_interface
{
public:
// construction/destruction
gg_ext_port_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
virtual ~gg_ext_port_device();
// static configuration helpers
template<class _Object> static devcb_base &set_th_input_handler(device_t &device, _Object object) { return downcast<gg_ext_port_device &>(device).m_th_pin_handler.set_callback(object); }
template<class _Object> static devcb_base &set_pixel_handler(device_t &device, _Object object) { return downcast<gg_ext_port_device &>(device).m_pixel_handler.set_callback(object); }
// Currently, only the support for SMS Controller Adaptor is emulated,
// for when SMS Compatibility mode is enabled. In that mode, the 10 pins
// of the EXT port follows the same numbering of a SMS Control port.
// Data returned by the port_r methods:
// bit 0 - pin 1 - Up
// bit 1 - pin 2 - Down
// bit 2 - pin 3 - Left
// bit 3 - pin 4 - Right
// bit 4 - pin 5 - Vcc (no data)
// bit 5 - pin 6 - TL (Button 1/Light Phaser Trigger)
// bit 6 - pin 7 - TH (Light Phaser sensor)
// pin 8 - GND
// bit 7 - pin 9 - TR (Button 2)
// pin 10 - Not connected
//
UINT8 port_r();
void port_w( UINT8 data );
void th_pin_w(int state);
UINT32 pixel_r();
//protected:
// device-level overrides
virtual void device_start() override;
device_gg_ext_port_interface *m_device;
private:
devcb_write_line m_th_pin_handler;
devcb_read32 m_pixel_handler;
};
// ======================> device_gg_ext_port_interface
// class representing interface-specific live sms_expansion card
class device_gg_ext_port_interface : public device_slot_card_interface
{
public:
// construction/destruction
device_gg_ext_port_interface(const machine_config &mconfig, device_t &device);
virtual ~device_gg_ext_port_interface();
virtual UINT8 peripheral_r() { return 0xff; };
virtual void peripheral_w(UINT8 data) { };
protected:
gg_ext_port_device *m_port;
};
// device type definition
extern const device_type GG_EXT_PORT;
SLOT_INTERFACE_EXTERN( gg_ext_port_devices );
#endif
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