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// license:BSD-3-Clause
// copyright-holders:Olivier Galibert,Andreas Naive
#ifndef MAME_MACHINE_NAOMIM4_H
#define MAME_MACHINE_NAOMIM4_H
#include "naomibd.h"
class naomi_m4_board : public naomi_board
{
public:
template <typename T, typename U>
naomi_m4_board(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, T &&eeprom_tag, U &&keyregion_tag)
: naomi_m4_board(mconfig, tag, owner, clock)
{
eeprom.set_tag(std::forward<T>(eeprom_tag));
m_key_data.set_tag(std::forward<U>(keyregion_tag));
}
naomi_m4_board(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
virtual void submap(address_map &map) override;
uint16_t m4_id_r();
protected:
virtual void device_start() override;
virtual void device_reset() override;
virtual void board_setup_address(uint32_t address, bool is_dma) override;
virtual void board_get_buffer(uint8_t *&base, uint32_t &limit) override;
virtual void board_advance(uint32_t size) override;
virtual void board_write(offs_t offset, uint16_t data) override;
private:
enum { BUFFER_SIZE = 32768 };
static const uint8_t k_sboxes[4][16];
uint16_t m4id;
required_memory_region m_region;
required_region_ptr<uint8_t> m_key_data;
uint16_t subkey1, subkey2;
std::unique_ptr<uint16_t[]> one_round;
std::unique_ptr<uint8_t[]> buffer;
uint32_t rom_cur_address, buffer_actual_size;
uint16_t iv;
uint8_t counter;
bool encryption;
bool cfi_mode;
void enc_init();
void enc_reset();
void enc_fill();
uint16_t decrypt_one_round(uint16_t word, uint16_t subkey);
};
DECLARE_DEVICE_TYPE(NAOMI_M4_BOARD, naomi_m4_board)
#endif // MAME_MACHINE_NAOMIM4_H
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