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// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
#ifndef _NAOMIGD_H_
#define _NAOMIGD_H_
#include "machine/naomibd.h"
#define MCFG_NAOMI_GDROM_BOARD_ADD(_tag, _image_tag, _pic_tag, _eeprom_tag, _irq_cb) \
MCFG_NAOMI_BOARD_ADD(_tag, NAOMI_GDROM_BOARD, _eeprom_tag, _irq_cb) \
naomi_gdrom_board::static_set_tags(*device, _image_tag, _pic_tag);
class naomi_gdrom_board : public naomi_board
{
public:
naomi_gdrom_board(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
static void static_set_tags(device_t &device, const char *_image_tag, const char *_pic_tag);
uint8_t *memory(uint32_t &size) { size = dimm_data_size; return dimm_data; }
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;
private:
enum { FILENAME_LENGTH=24 };
const char *image_tag, *pic_tag;
uint32_t dimm_cur_address;
// Note: voluntarily not saved into the state
uint8_t *dimm_data;
uint32_t dimm_data_size;
static const uint32_t DES_LEFTSWAP[];
static const uint32_t DES_RIGHTSWAP[];
static const uint32_t DES_SBOX1[];
static const uint32_t DES_SBOX2[];
static const uint32_t DES_SBOX3[];
static const uint32_t DES_SBOX4[];
static const uint32_t DES_SBOX5[];
static const uint32_t DES_SBOX6[];
static const uint32_t DES_SBOX7[];
static const uint32_t DES_SBOX8[];
static const uint32_t DES_MASK_TABLE[];
static const uint8_t DES_ROTATE_TABLE[16];
void find_file(const char *name, const uint8_t *dir_sector, uint32_t &file_start, uint32_t &file_size);
inline void permutate(uint32_t &a, uint32_t &b, uint32_t m, int shift);
void des_generate_subkeys(const uint64_t key, uint32_t *subkeys);
uint64_t des_encrypt_decrypt(bool decrypt, uint64_t src, const uint32_t *des_subkeys);
uint64_t rev64(uint64_t src);
uint64_t read_to_qword(const uint8_t *region);
void write_from_qword(uint8_t *region, uint64_t qword);
};
extern const device_type NAOMI_GDROM_BOARD;
#endif
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