Created
December 28, 2023 14:52
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Convert Action Replay code to Libretro code
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| # Encryption seeds for Pro Action Replay v3/4 | |
| Seeds = [ | |
| 0x7AA9648F, | |
| 0x7FAE6994, | |
| 0xC0EFAAD5, | |
| 0x42712C57 | |
| ] | |
| def decrypt(opcode, operand): | |
| for i in range(32, 0, -1): | |
| operand = (operand - ((opcode * 16 + Seeds[2]) ^ ((opcode + 0x9E3779B9 * i) ^ ((opcode >> 5) + Seeds[3])))) & 0xFFFFFFFF | |
| opcode = (opcode - ((operand * 16 + Seeds[0]) ^ ((operand + 0x9E3779B9 * i) ^ ((operand >> 5) + Seeds[1])))) & 0xFFFFFFFF | |
| return opcode, operand | |
| def parse_codes(text): | |
| lines = text.strip().split('\n') | |
| return [(int(line.split()[0], 16), int(line.split()[1], 16)) for line in lines] | |
| def main(input_text): | |
| codes = parse_codes(input_text) | |
| decrypted_codes = [f"{opcode:08X} {operand:08X}" for opcode, operand in (decrypt(opcode, operand) for opcode, operand in codes)] | |
| return '+'.join(decrypted_codes) | |
| ###### Insert your code here ###### | |
| input_text = """ | |
| F3A9A86D 4E2629B4 | |
| 18452A7D DDE55BCC | |
| """ | |
| # Call function and store result | |
| decrypted_result = main(input_text) | |
| # Format to .cht | |
| print(f"cheatX_desc = \"\"") | |
| print(f"cheatX_code = \"{decrypted_result}\"") | |
| print(f"cheatX_enable = false") |
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