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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore PET User Port emulation
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************
GND 1 A GND
VIDEO 2 B CA1
_SRQ IN 3 C PA0
EOI 4 D PA1
DIAG 5 E PA2
#2 CASS READ 6 F PA3
CASS WRITE 7 H PA4
#1 CASS READ 8 J PA5
VERT DRIVE 9 K PA6
HORZ DRIVE 10 L PA7
GND 11 M CB2
GND 12 N GND
**********************************************************************/
#pragma once
#ifndef __PET_USER_PORT__
#define __PET_USER_PORT__
#include "emu.h"
//**************************************************************************
// CONSTANTS
//**************************************************************************
#define PET_USER_PORT_TAG "user"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define PET_USER_PORT_INTERFACE(_name) \
const pet_user_port_interface (_name) =
#define MCFG_PET_USER_PORT_ADD(_tag, _config, _slot_intf, _def_slot) \
MCFG_DEVICE_ADD(_tag, PET_USER_PORT, 0) \
MCFG_DEVICE_CONFIG(_config) \
MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, false)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> pet_user_port_interface
struct pet_user_port_interface
{
devcb_write_line m_out_ca1_cb;
devcb_write_line m_out_cb2_cb;
};
// ======================> pet_user_port_device
class device_pet_user_port_interface;
class pet_user_port_device : public device_t,
public pet_user_port_interface,
public device_slot_interface
{
public:
// construction/destruction
pet_user_port_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// computer interface
DECLARE_READ8_MEMBER( pa_r );
DECLARE_WRITE8_MEMBER( pa_w );
DECLARE_READ_LINE_MEMBER( ca1_r );
DECLARE_WRITE_LINE_MEMBER( ca1_w );
DECLARE_READ_LINE_MEMBER( cb2_r );
DECLARE_WRITE_LINE_MEMBER( cb2_w );
// cartridge interface
DECLARE_WRITE_LINE_MEMBER( via_ca1_w ) { m_out_ca1_func(state); }
DECLARE_WRITE_LINE_MEMBER( via_cb2_w ) { m_out_cb2_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_ca1_func;
devcb_resolved_write_line m_out_cb2_func;
device_pet_user_port_interface *m_card;
};
// ======================> device_pet_user_port_interface
// class representing interface-specific live pet_expansion card
class device_pet_user_port_interface : public device_slot_card_interface
{
public:
// construction/destruction
device_pet_user_port_interface(const machine_config &mconfig, device_t &device);
virtual ~device_pet_user_port_interface();
virtual UINT8 pet_pa_r(address_space &space, offs_t offset) { return 0xff; };
virtual void pet_pa_w(address_space &space, offs_t offset, UINT8 data) { };
virtual int pet_ca1_r() { return 1; };
virtual void pet_ca1_w(int state) { };
virtual int pet_cb2_r() { return 1; };
virtual void pet_cb2_w(int state) { };
protected:
pet_user_port_device *m_slot;
};
// device type definition
extern const device_type PET_USER_PORT;
// slot devices
SLOT_INTERFACE_EXTERN( pet_user_port_cards );
#endif
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