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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, NULL, _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 clock);
static void static_set_tags(device_t &device, const char *_image_tag, const char *_pic_tag);
UINT8 *memory(UINT32 &size) { size = dimm_data_size; return dimm_data; }
protected:
virtual void device_start();
virtual void device_reset();
virtual void board_setup_address(UINT32 address, bool is_dma);
virtual void board_get_buffer(UINT8 *&base, UINT32 &limit);
virtual void board_advance(UINT32 size);
private:
enum { FILENAME_LENGTH=24 };
const char *image_tag, *pic_tag;
UINT32 dimm_cur_address;
// Note: voluntarily not saved into the state
UINT8 *dimm_data;
UINT32 dimm_data_size;
static const UINT32 DES_LEFTSWAP[];
static const UINT32 DES_RIGHTSWAP[];
static const UINT32 DES_SBOX1[];
static const UINT32 DES_SBOX2[];
static const UINT32 DES_SBOX3[];
static const UINT32 DES_SBOX4[];
static const UINT32 DES_SBOX5[];
static const UINT32 DES_SBOX6[];
static const UINT32 DES_SBOX7[];
static const UINT32 DES_SBOX8[];
static const UINT32 DES_MASK_TABLE[];
static const UINT8 DES_ROTATE_TABLE[16];
void find_file(const char *name, const UINT8 *dir_sector, UINT32 &file_start, UINT32 &file_size);
inline void permutate(UINT32 &a, UINT32 &b, UINT32 m, int shift);
void des_generate_subkeys(const UINT64 key, UINT32 *subkeys);
UINT64 des_encrypt_decrypt(bool decrypt, UINT64 src, const UINT32 *des_subkeys);
UINT64 rev64(UINT64 src);
UINT64 read_to_qword(const UINT8 *region);
void write_from_qword(UINT8 *region, UINT64 qword);
};
extern const device_type NAOMI_GDROM_BOARD;
#endif
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