// license:BSD-3-Clause // copyright-holders:Olivier Galibert,Andreas Naive #ifndef MAME_MACHINE_AWBOARD_H #define MAME_MACHINE_AWBOARD_H #pragma once #include "naomig1.h" class aw_rom_board : public naomi_g1_device { public: aw_rom_board(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); virtual void submap(address_map &map) override; void epr_offsetl_w(uint16_t data); // 5f7000 void epr_offseth_w(uint16_t data); // 5f7004 void mpr_record_index_w(uint16_t data); // 5f700c void mpr_first_file_index_w(uint16_t data); // 5f7010 void mpr_file_offsetl_w(uint16_t data); // 5f7014 void mpr_file_offseth_w(uint16_t data); // 5f7018 uint16_t pio_r(); // 5f7080 void pio_w(uint16_t data); // 5f7080 protected: virtual void device_start() override; virtual void device_reset() override; virtual void dma_get_position(uint8_t *&base, uint32_t &limit, bool to_mainram) override; virtual void dma_advance(uint32_t size) override; private: enum { EPR, MPR_RECORD, MPR_FILE }; required_memory_region m_region; uint8_t rombd_key; uint32_t mpr_offset, mpr_bank; uint32_t epr_offset, mpr_file_offset; uint16_t mpr_record_index, mpr_first_file_index; uint16_t decrypted_buf[16]; uint32_t dma_offset, dma_limit; struct sbox_set { uint8_t S0[32]; uint8_t S1[16]; uint8_t S2[16]; uint8_t S3[8]; }; static const int permutation_table[4][16]; static const sbox_set sboxes_table[4]; static const int xor_table[16]; static uint16_t decrypt(uint16_t cipherText, uint32_t address, const uint8_t key); uint16_t decrypt16(uint32_t address) { return decrypt(m_region->as_u16(address), address, rombd_key); } void recalc_dma_offset(int mode); }; DECLARE_DEVICE_TYPE(AW_ROM_BOARD, aw_rom_board) #endif // MAME_MACHINE_AWBOARD_H