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// license:BSD-3-Clause
// copyright-holders:hap
/***************************************************************************
Alpha Denshi ALPHA-8201 family protection emulation
***************************************************************************/
#ifndef _ALPHA8201_H_
#define _ALPHA8201_H_
#include "emu.h"
class alpha_8201_device : public device_t
{
public:
alpha_8201_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~alpha_8201_device() {}
DECLARE_READ8_MEMBER(mcu_data_r);
DECLARE_WRITE8_MEMBER(mcu_data_w);
DECLARE_WRITE16_MEMBER(mcu_d_w);
// external I/O
DECLARE_WRITE_LINE_MEMBER(bus_dir_w);
DECLARE_WRITE_LINE_MEMBER(mcu_start_w);
DECLARE_READ8_MEMBER(ext_ram_r);
DECLARE_WRITE8_MEMBER(ext_ram_w);
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual machine_config_constructor device_mconfig_additions() const;
private:
// devices/pointers
required_device<cpu_device> m_mcu;
// internal state
int m_bus; // shared RAM bus direction
UINT16 m_mcu_address; // MCU side RAM address
UINT16 m_mcu_d; // MCU D output data
UINT8 m_mcu_r[4]; // MCU R0-R3 output data
UINT8* m_shared_ram; // 1KB RAM
void mcu_update_address();
void mcu_writeram();
};
extern const device_type ALPHA_8201;
#endif /* _ALPHA8201_H_ */
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