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/**********************************************************************
Commodore VIC-20 User Port emulation
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************
GND 1 A GND
+5V 2 B CB1
/RESET 3 C PB0
JOY0 4 D PB1
JOY1 5 E PB2
JOY2 6 F PB3
LIGHT PEN 7 H PB4
CASSETTE SWITCH 8 J PB5
ATN 9 K PB6
+9VAC 10 L PB7
+9VAC 11 M CB2
GND 12 N GND
**********************************************************************/
#pragma once
#ifndef __VIC20_USER_PORT__
#define __VIC20_USER_PORT__
#include "emu.h"
//**************************************************************************
// CONSTANTS
//**************************************************************************
#define VIC20_USER_PORT_TAG "user"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define VIC20_USER_PORT_INTERFACE(_name) \
const vic20_user_port_interface (_name) =
#define MCFG_VIC20_USER_PORT_ADD(_tag, _config, _slot_intf, _def_slot) \
MCFG_DEVICE_ADD(_tag, VIC20_USER_PORT, 0) \
MCFG_DEVICE_CONFIG(_config) \
MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, false)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> vic20_user_port_interface
struct vic20_user_port_interface
{
devcb_write_line m_out_light_pen_cb;
devcb_write_line m_out_cb1_cb;
devcb_write_line m_out_cb2_cb;
devcb_write_line m_out_reset_cb;
};
// ======================> vic20_user_port_device
class device_vic20_user_port_interface;
class vic20_user_port_device : public device_t,
public vic20_user_port_interface,
public device_slot_interface
{
public:
// construction/destruction
vic20_user_port_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// computer interface
DECLARE_READ8_MEMBER( pb_r );
DECLARE_WRITE8_MEMBER( pb_w );
DECLARE_READ_LINE_MEMBER( joy0_r );
DECLARE_READ_LINE_MEMBER( joy1_r );
DECLARE_READ_LINE_MEMBER( joy2_r );
DECLARE_READ_LINE_MEMBER( light_pen_r );
DECLARE_READ_LINE_MEMBER( cassette_switch_r );
DECLARE_WRITE_LINE_MEMBER( cb1_w );
DECLARE_WRITE_LINE_MEMBER( cb2_w );
DECLARE_WRITE_LINE_MEMBER( atn_w );
DECLARE_WRITE_LINE_MEMBER( port_reset_w );
// cartridge interface
DECLARE_WRITE_LINE_MEMBER( light_pen_w ) { m_out_light_pen_func(state); }
DECLARE_WRITE_LINE_MEMBER( via_cb1_w ) { m_out_cb1_func(state); }
DECLARE_WRITE_LINE_MEMBER( via_cb2_w ) { m_out_cb2_func(state); }
DECLARE_WRITE_LINE_MEMBER( reset_w ) { m_out_reset_func(state); }
protected:
// device-level overrides
virtual void device_config_complete();
virtual void device_start();
virtual void device_reset();
devcb_resolved_write_line m_out_light_pen_func;
devcb_resolved_write_line m_out_cb1_func;
devcb_resolved_write_line m_out_cb2_func;
devcb_resolved_write_line m_out_reset_func;
device_vic20_user_port_interface *m_card;
};
// ======================> device_vic20_user_port_interface
// class representing interface-specific live vic20_expansion card
class device_vic20_user_port_interface : public device_slot_card_interface
{
public:
// construction/destruction
device_vic20_user_port_interface(const machine_config &mconfig, device_t &device);
virtual ~device_vic20_user_port_interface();
virtual UINT8 vic20_pb_r(address_space &space, offs_t offset) { return 0xff; };
virtual void vic20_pb_w(address_space &space, offs_t offset, UINT8 data) { };
virtual int vic20_joy0_r() { return 1; };
virtual int vic20_joy1_r() { return 1; };
virtual int vic20_joy2_r() { return 1; };
virtual int vic20_light_pen_r() { return 1; };
virtual int vic20_cassette_switch_r() { return 1; };
virtual void vic20_cb1_w(int state) { };
virtual void vic20_cb2_w(int state) { };
virtual void vic20_atn_w(int state) { };
protected:
vic20_user_port_device *m_slot;
};
// device type definition
extern const device_type VIC20_USER_PORT;
#endif
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