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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore CBM-II Expansion Port emulation
**********************************************************************
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
**********************************************************************/
#ifndef MAME_BUS_CBM2_EXP_H
#define MAME_BUS_CBM2_EXP_H
#pragma once
#include "softlist_dev.h"
//**************************************************************************
// CONSTANTS
//**************************************************************************
#define CBM2_EXPANSION_SLOT_TAG "exp"
//**************************************************************************
// 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
template <typename T>
cbm2_expansion_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, uint32_t clock, T &&opts, char const *dflt)
: cbm2_expansion_slot_device(mconfig, tag, owner, clock)
{
option_reset();
opts(*this);
set_default_option(dflt);
set_fixed(false);
}
cbm2_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
// computer interface
uint8_t read(offs_t offset, uint8_t data, int csbank1, int csbank2, int csbank3);
void write(offs_t offset, uint8_t data, int csbank1, int csbank2, int csbank3);
// cartridge interface
int phi2() { return clock(); }
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// image-level overrides
virtual image_init_result call_load() override;
virtual const software_list_loader &get_software_list_loader() const override { return rom_software_list_loader::instance(); }
virtual iodevice_t image_type() const override { return IO_CARTSLOT; }
virtual bool is_readable() const override { return 1; }
virtual bool is_writeable() const override { return 0; }
virtual bool is_creatable() const override { return 0; }
virtual bool must_be_loaded() const override { return 0; }
virtual bool is_reset_on_load() const override { return 1; }
virtual const char *image_interface() const override { return "cbm2_cart"; }
virtual const char *file_extensions() const override { return "20,40,60"; }
// slot interface overrides
virtual std::string get_default_card_software(get_default_card_software_hook &hook) const override;
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
virtual ~device_cbm2_expansion_card_interface();
virtual uint8_t cbm2_bd_r(offs_t offset, uint8_t data, int csbank1, int csbank2, int csbank3) { return data; };
virtual void cbm2_bd_w(offs_t offset, uint8_t data, int csbank1, int csbank2, int csbank3) { };
protected:
device_cbm2_expansion_card_interface(const machine_config &mconfig, device_t &device);
optional_shared_ptr<uint8_t> m_bank1;
optional_shared_ptr<uint8_t> m_bank2;
optional_shared_ptr<uint8_t> m_bank3;
cbm2_expansion_slot_device *m_slot;
};
// device type definition
DECLARE_DEVICE_TYPE(CBM2_EXPANSION_SLOT, cbm2_expansion_slot_device)
void cbm2_expansion_cards(device_slot_interface &device);
#endif // MAME_BUS_CBM2_EXP_H
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