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Diffstat (limited to 'src/devices/bus/gamegear/ggext.h')
-rw-r--r-- | src/devices/bus/gamegear/ggext.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/devices/bus/gamegear/ggext.h b/src/devices/bus/gamegear/ggext.h new file mode 100644 index 00000000000..a3110dea711 --- /dev/null +++ b/src/devices/bus/gamegear/ggext.h @@ -0,0 +1,122 @@ +// 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(); + + 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 |