64 lines
1.5 KiB
C++
64 lines
1.5 KiB
C++
/*
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* awcartridge.h
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*
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* Created on: Nov 5, 2018
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* Author: flyinghead
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* Plagiarized from mame (mame/src/mame/machine/awboard.h)
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* // license:BSD-3-Clause
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* // copyright-holders:Olivier Galibert,Andreas Naive
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*
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*/
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#ifndef CORE_HW_NAOMI_AWCARTRIDGE_H_
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#define CORE_HW_NAOMI_AWCARTRIDGE_H_
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#include "naomi_cart.h"
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class AWCartridge: public Cartridge
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{
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public:
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AWCartridge(u32 size) : Cartridge(size) {}
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void Init() override;
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u32 ReadMem(u32 address, u32 size) override;
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void WriteMem(u32 address, u32 data, u32 size) override;
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void *GetDmaPtr(u32 &size) override;
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void AdvancePtr(u32 size) override;
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std::string GetGameId() override;
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void SetKey(u32 key) override;
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void Serialize(void **data, unsigned int *total_size) override;
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void Unserialize(void **data, unsigned int *total_size) override;
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private:
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void device_reset();
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enum { EPR, MPR_RECORD, MPR_FILE };
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u32 rombd_key;
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u32 mpr_offset, mpr_bank;
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u32 epr_offset, mpr_file_offset;
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u16 mpr_record_index, mpr_first_file_index;
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u16 decrypted_buf[16];
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u32 dma_offset, dma_limit;
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struct sbox_set {
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u8 S0[32];
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u8 S1[16];
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u8 S2[16];
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u8 S3[8];
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};
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static const u8 permutation_table[4][16];
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static const sbox_set sboxes_table[4];
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static const int xor_table[16];
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static u16 decrypt(u16 cipherText, u32 address, u8 key);
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u16 decrypt16(u32 address) { return decrypt(((u16 *)RomPtr)[address % (RomSize / 2)], address, rombd_key); }
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void recalc_dma_offset(int mode);
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};
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#endif /* CORE_HW_NAOMI_AWCARTRIDGE_H_ */
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