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// license:BSD-3-Clause
// copyright-holders:smf
/* CAT702 security chip */
#pragma once
#ifndef __CAT702_H__
#define __CAT702_H__
#include "emu.h"
extern const device_type CAT702;
#define MCFG_CAT702_DATAOUT_HANDLER(_devcb) \
devcb = &cat702_device::set_dataout_handler(*device, DEVCB_##_devcb);
class cat702_device : public device_t
{
public:
cat702_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// static configuration helpers
template<class _Object> static devcb_base &set_dataout_handler(device_t &device, _Object object) { return downcast<cat702_device &>(device).m_dataout_handler.set_callback(object); }
DECLARE_WRITE_LINE_MEMBER(write_select);
DECLARE_WRITE_LINE_MEMBER(write_datain);
DECLARE_WRITE_LINE_MEMBER(write_clock);
protected:
virtual void device_start() override;
private:
uint8_t compute_sbox_coef(int sel, int bit);
void apply_bit_sbox(int sel);
void apply_sbox(const uint8_t *sbox);
optional_memory_region m_region;
uint8_t m_transform[8];
int m_select;
int m_clock;
int m_datain;
uint8_t m_state;
uint8_t m_bit;
devcb_write_line m_dataout_handler;
};
#endif
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