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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore CBM-II Expansion Port emulation
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************
A0 1 A BD0
A1 2 B BD1
A2 3 C BD2
A3 4 D BD3
A4 5 E BD4
A5 6 F BD5
A6 7 H BD6
A7 8 J BD7
A8 9 K GND
A9 10 L GND
A10 11 M SR/_W
A11 12 N Sphi2
A12 13 P _CSBANK1
+5V 14 R _CSBANK2
+5V 15 S _CSBANK2
**********************************************************************/
#pragma once
#ifndef __CBM2_EXPANSION_SLOT__
#define __CBM2_EXPANSION_SLOT__
#include "emu.h"
//**************************************************************************
// CONSTANTS
//**************************************************************************
#define CBM2_EXPANSION_SLOT_TAG "exp"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_CBM2_EXPANSION_SLOT_ADD(_tag, _clock, _slot_intf, _def_slot) \
MCFG_DEVICE_ADD(_tag, CBM2_EXPANSION_SLOT, _clock) \
MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, false)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> cbm2_expansion_slot_device
class device_cbm2_expansion_card_interface;
class cbm2_expansion_slot_device : public device_t,
public device_slot_interface,
public device_image_interface
{
public:
// construction/destruction
cbm2_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// computer interface
UINT8 read(address_space &space, offs_t offset, UINT8 data, int csbank1, int csbank2, int csbank3);
void write(address_space &space, offs_t offset, UINT8 data, int csbank1, int csbank2, int csbank3);
// cartridge interface
int phi2() { return clock(); }
protected:
// device-level overrides
virtual void device_config_complete() { update_names(); }
virtual void device_start();
virtual void device_reset();
// image-level overrides
virtual bool call_load();
virtual bool call_softlist_load(software_list_device &swlist, const char *swname, const rom_entry *start_entry);
virtual iodevice_t image_type() const { return IO_CARTSLOT; }
virtual bool is_readable() const { return 1; }
virtual bool is_writeable() const { return 0; }
virtual bool is_creatable() const { return 0; }
virtual bool must_be_loaded() const { return 0; }
virtual bool is_reset_on_load() const { return 1; }
virtual const char *image_interface() const { return "cbm2_cart"; }
virtual const char *file_extensions() const { return "20,40,60"; }
virtual const option_guide *create_option_guide() const { return NULL; }
// slot interface overrides
virtual void get_default_card_software(std::string &result);
device_cbm2_expansion_card_interface *m_card;
};
// ======================> device_cbm2_expansion_card_interface
class device_cbm2_expansion_card_interface : public device_slot_card_interface
{
friend class cbm2_expansion_slot_device;
public:
// construction/destruction
device_cbm2_expansion_card_interface(const machine_config &mconfig, device_t &device);
virtual ~device_cbm2_expansion_card_interface();
virtual UINT8 cbm2_bd_r(address_space &space, offs_t offset, UINT8 data, int csbank1, int csbank2, int csbank3) { return data; };
virtual void cbm2_bd_w(address_space &space, offs_t offset, UINT8 data, int csbank1, int csbank2, int csbank3) { };
protected:
optional_shared_ptr<UINT8> m_bank1;
optional_shared_ptr<UINT8> m_bank2;
optional_shared_ptr<UINT8> m_bank3;
cbm2_expansion_slot_device *m_slot;
};
// device type definition
extern const device_type CBM2_EXPANSION_SLOT;
SLOT_INTERFACE_EXTERN( cbm2_expansion_cards );
#endif
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