adding the new sourcefiles would have helped probably... ;)

src/emu/bus/gamegear/gear2gear.c

@@ -0,0 +1,120 @@
+/**********************************************************************
+
+    Sega Game Gear "Gear to Gear Port" emulation
+
+    Copyright MESS Team.
+    Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#include "gear2gear.h"
+// slot devices
+#include "smsctrladp.h"
+
+
+
+//**************************************************************************
+//  GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type GG_GEAR2GEAR_PORT = &device_creator<gg_gear2gear_port_device>;
+
+
+
+//**************************************************************************
+//  CARD INTERFACE
+//**************************************************************************
+
+//-------------------------------------------------
+//  device_gg_gear2gear_port_interface - constructor
+//-------------------------------------------------
+
+device_gg_gear2gear_port_interface::device_gg_gear2gear_port_interface(const machine_config &mconfig, device_t &device)
+	: device_slot_card_interface(mconfig,device)
+{
+	m_port = dynamic_cast<gg_gear2gear_port_device *>(device.owner());
+}
+
+
+//-------------------------------------------------
+//  ~device_gg_gear2gear_port_interface - destructor
+//-------------------------------------------------
+
+device_gg_gear2gear_port_interface::~device_gg_gear2gear_port_interface()
+{
+}
+
+
+
+//**************************************************************************
+//  LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+//  gg_gear2gear_port_device - constructor
+//-------------------------------------------------
+
+gg_gear2gear_port_device::gg_gear2gear_port_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+						device_t(mconfig, GG_GEAR2GEAR_PORT, "Gear to Gear Port", tag, owner, clock, "gg_gear2gear_port", __FILE__),
+						device_slot_interface(mconfig, *this),
+						m_th_pin_handler(*this),
+						m_pixel_handler(*this)
+{
+}
+
+
+//-------------------------------------------------
+//  gg_gear2gear_port_device - destructor
+//-------------------------------------------------
+
+gg_gear2gear_port_device::~gg_gear2gear_port_device()
+{
+}
+
+
+//-------------------------------------------------
+//  device_start - device-specific startup
+//-------------------------------------------------
+
+void gg_gear2gear_port_device::device_start()
+{
+	m_device = dynamic_cast<device_gg_gear2gear_port_interface *>(get_card_device());
+
+	m_th_pin_handler.resolve_safe();
+	m_pixel_handler.resolve_safe(0);
+}
+
+
+UINT8 gg_gear2gear_port_device::port_r()
+{
+	UINT8 data = 0xff;
+	if (m_device)
+		data = m_device->peripheral_r();
+	return data;
+}
+
+void gg_gear2gear_port_device::port_w( UINT8 data )
+{
+	if (m_device)
+		m_device->peripheral_w(data);
+}
+
+
+void gg_gear2gear_port_device::th_pin_w(int state)
+{
+	m_th_pin_handler(state);
+}
+
+UINT32 gg_gear2gear_port_device::pixel_r()
+{
+	return m_pixel_handler();
+}
+
+
+//-------------------------------------------------
+//  SLOT_INTERFACE( gg_gear2gear_port_devices )
+//-------------------------------------------------
+
+SLOT_INTERFACE_START( gg_gear2gear_port_devices )
+	SLOT_INTERFACE("smsctrladp", SMS_CTRL_ADAPTOR)
+SLOT_INTERFACE_END

src/emu/bus/gamegear/gear2gear.h

@@ -0,0 +1,123 @@
+/**********************************************************************
+
+    Sega Game Gear "Gear to Gear Port" emulation
+
+    Copyright MESS Team.
+    Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************
+
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __GG_GEAR2GEAR_PORT__
+#define __GG_GEAR2GEAR_PORT__
+
+#include "emu.h"
+
+
+
+//**************************************************************************
+//  INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_GG_GEAR2GEAR_PORT_ADD(_tag, _slot_intf, _def_slot) \
+	MCFG_DEVICE_ADD(_tag, GG_GEAR2GEAR_PORT, 0) \
+	MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, false)
+#define MCFG_GG_GEAR2GEAR_PORT_MODIFY(_tag) \
+	MCFG_DEVICE_MODIFY(_tag)
+
+
+#define MCFG_GG_GEAR2GEAR_PORT_TH_INPUT_HANDLER(_devcb) \
+	devcb = &gg_gear2gear_port_device::set_th_input_handler(*device, DEVCB_##_devcb);
+
+
+#define MCFG_GG_GEAR2GEAR_PORT_PIXEL_HANDLER(_devcb) \
+	devcb = &gg_gear2gear_port_device::set_pixel_handler(*device, DEVCB_##_devcb);
+
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> gg_gear2gear_port_device
+
+class device_gg_gear2gear_port_interface;
+
+class gg_gear2gear_port_device : public device_t,
+								public device_slot_interface
+{
+public:
+	// construction/destruction
+	gg_gear2gear_port_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+	virtual ~gg_gear2gear_port_device();
+
+	// static configuration helpers
+	template<class _Object> static devcb_base &set_th_input_handler(device_t &device, _Object object) { return downcast<gg_gear2gear_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_gear2gear_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 Gear to Gear 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();
+
+	device_gg_gear2gear_port_interface *m_device;
+
+private:
+	devcb_write_line m_th_pin_handler;
+	devcb_read32 m_pixel_handler;
+};
+
+
+// ======================> device_gg_gear2gear_port_interface
+
+// class representing interface-specific live sms_expansion card
+class device_gg_gear2gear_port_interface : public device_slot_card_interface
+{
+public:
+	// construction/destruction
+	device_gg_gear2gear_port_interface(const machine_config &mconfig, device_t &device);
+	virtual ~device_gg_gear2gear_port_interface();
+
+	virtual UINT8 peripheral_r() { return 0xff; };
+	virtual void peripheral_w(UINT8 data) { };
+
+protected:
+	gg_gear2gear_port_device *m_port;
+};
+
+
+// device type definition
+extern const device_type GG_GEAR2GEAR_PORT;
+
+
+SLOT_INTERFACE_EXTERN( gg_gear2gear_port_devices );
+
+
+#endif

src/emu/bus/gamegear/smsctrladp.c

@@ -0,0 +1,95 @@
+/**********************************************************************
+
+    Sega Game Gear "Gear to Gear Port SMS Controller Adaptor" emulation
+    Also known as "Master Link" cable.
+
+    Copyright MESS Team.
+    Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#include "smsctrladp.h"
+
+
+
+//**************************************************************************
+//  DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type SMS_CTRL_ADAPTOR = &device_creator<sms_ctrl_adaptor_device>;
+
+
+//**************************************************************************
+//  LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+//  sms_ctrl_adaptor_device - constructor
+//-------------------------------------------------
+
+sms_ctrl_adaptor_device::sms_ctrl_adaptor_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+	device_t(mconfig, SMS_CTRL_ADAPTOR, "SMS Controller Adaptor", tag, owner, clock, "sms_ctrl_adaptor", __FILE__),
+	device_gg_gear2gear_port_interface(mconfig, *this),
+	m_subctrl_port(*this, "ctrl")
+{
+}
+
+
+//-------------------------------------------------
+//  device_start - device-specific startup
+//-------------------------------------------------
+
+void sms_ctrl_adaptor_device::device_start()
+{
+	m_subctrl_port->device_start();
+}
+
+
+//-------------------------------------------------
+//  sms_peripheral_r - rapid fire read
+//-------------------------------------------------
+
+UINT8 sms_ctrl_adaptor_device::peripheral_r()
+{
+	return m_subctrl_port->port_r();
+}
+
+
+//-------------------------------------------------
+//  sms_peripheral_w - rapid fire write
+//-------------------------------------------------
+
+void sms_ctrl_adaptor_device::peripheral_w(UINT8 data)
+{
+	m_subctrl_port->port_w(data);
+}
+
+
+//-------------------------------------------------
+//  machine_config_additions - device-specific
+//  machine configurations
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER( sms_ctrl_adaptor_device::th_pin_w )
+{
+	m_port->th_pin_w(state);
+}
+
+
+READ32_MEMBER( sms_ctrl_adaptor_device::pixel_r )
+{
+	return m_port->pixel_r();
+}
+
+
+static MACHINE_CONFIG_FRAGMENT( sms_adp_slot )
+	MCFG_SMS_CONTROL_PORT_ADD("ctrl", sms_control_port_devices, "joypad")
+	MCFG_SMS_CONTROL_PORT_TH_INPUT_HANDLER(WRITELINE(sms_ctrl_adaptor_device, th_pin_w))
+	MCFG_SMS_CONTROL_PORT_PIXEL_HANDLER(READ32(sms_ctrl_adaptor_device, pixel_r))
+MACHINE_CONFIG_END
+
+
+machine_config_constructor sms_ctrl_adaptor_device::device_mconfig_additions() const
+{
+	return MACHINE_CONFIG_NAME( sms_adp_slot );
+}

src/emu/bus/gamegear/smsctrladp.h

@@ -0,0 +1,57 @@
+/**********************************************************************
+
+    Sega Game Gear "Gear to Gear Port SMS Controller Adaptor" emulation
+    Also known as "Master Link" cable.
+
+    Copyright MESS Team.
+    Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __SMS_CTRL_ADAPTOR__
+#define __SMS_CTRL_ADAPTOR__
+
+
+#include "emu.h"
+#include "gear2gear.h"
+#include "../sms_ctrl/smsctrl.h"
+
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> sms_ctrl_adaptor_device
+
+class sms_ctrl_adaptor_device : public device_t,
+							public device_gg_gear2gear_port_interface
+{
+public:
+	// construction/destruction
+	sms_ctrl_adaptor_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+	DECLARE_WRITE_LINE_MEMBER(th_pin_w);
+	DECLARE_READ32_MEMBER(pixel_r);
+
+protected:
+	// device-level overrides
+	virtual void device_start();
+	virtual machine_config_constructor device_mconfig_additions() const;
+
+	// device_gg_gear2gear_port_interface overrides
+	virtual UINT8 peripheral_r();
+	virtual void peripheral_w(UINT8 data);
+
+private:
+	required_device<sms_control_port_device> m_subctrl_port;
+};
+
+
+// device type definition
+extern const device_type SMS_CTRL_ADAPTOR;
+
+
+#endif