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// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
/***************************************************************************
m6504.h
Mostek 6502, NMOS variant with reduced address bus
***************************************************************************/
#ifndef __M6504_H__
#define __M6504_H__
#include "m6502.h"
class m6504_device : public m6502_device {
public:
m6504_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
protected:
class mi_6504_normal : public memory_interface {
public:
virtual ~mi_6504_normal() {}
virtual UINT8 read(UINT16 adr);
virtual UINT8 read_direct(UINT16 adr);
virtual UINT8 read_decrypted(UINT16 adr);
virtual void write(UINT16 adr, UINT8 val);
};
class mi_6504_nd : public mi_6504_normal {
public:
virtual ~mi_6504_nd() {}
virtual UINT8 read_direct(UINT16 adr);
virtual UINT8 read_decrypted(UINT16 adr);
};
virtual void device_start();
};
enum {
M6504_IRQ_LINE = m6502_device::IRQ_LINE,
M6504_NMI_LINE = m6502_device::NMI_LINE,
M6504_SET_OVERFLOW = m6502_device::V_LINE,
};
extern const device_type M6504;
#endif
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