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// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
/***************************************************************************
m6504.h
MOS Technology 6502, NMOS variant with reduced address bus
***************************************************************************/
#ifndef MAME_CPU_M6502_M6504_H
#define MAME_CPU_M6502_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_t clock);
protected:
class mi_6504_normal : public memory_interface {
public:
virtual ~mi_6504_normal() {}
virtual uint8_t read(uint16_t adr) override;
virtual uint8_t read_sync(uint16_t adr) override;
virtual uint8_t read_arg(uint16_t adr) override;
virtual void write(uint16_t adr, uint8_t val) override;
};
class mi_6504_nd : public mi_6504_normal {
public:
virtual ~mi_6504_nd() {}
virtual uint8_t read_sync(uint16_t adr) override;
virtual uint8_t read_arg(uint16_t adr) override;
};
virtual void device_start() override;
};
enum {
M6504_IRQ_LINE = m6502_device::IRQ_LINE,
M6504_NMI_LINE = m6502_device::NMI_LINE,
M6504_SET_OVERFLOW = m6502_device::V_LINE
};
DECLARE_DEVICE_TYPE(M6504, m6504_device);
#endif // MAME_CPU_M6502_M6504_H
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