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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore PET 64KB RAM Expansion emulation
**********************************************************************/
#pragma once
#ifndef __PET_64K__
#define __PET_64K__
#include "emu.h"
#include "exp.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> pet_64k_expansion_device
class pet_64k_expansion_device : public device_t,
public device_pet_expansion_card_interface
{
public:
// construction/destruction
pet_64k_expansion_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
// device_pet_expansion_card_interface overrides
virtual int pet_norom_r(address_space &space, offs_t offset, int sel);
virtual UINT8 pet_bd_r(address_space &space, offs_t offset, UINT8 data, int &sel);
virtual void pet_bd_w(address_space &space, offs_t offset, UINT8 data, int &sel);
private:
inline UINT8 read_ram(offs_t offset);
inline void write_ram(offs_t offset, UINT8 data);
optional_shared_ptr<UINT8> m_ram;
UINT8 m_ctrl;
};
// device type definition
extern const device_type PET_64K;
#endif
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