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  1. l_oliveira

    Decrypting a CPS2 game.

    On this thread I'll try to explain the approach I use when decrypting games manually. The target, an American revision of Street Fighter Zero/Alpha3. I am starting with the encrypted romset, decryption keys (mame can execute the game) and mame debugger. The first step is discern is the size of...
  2. l_oliveira

    Making CAPCOM ZN/ZN2 Q-SOUND program roms work on the CPS2

    As the title says, I spent a while thinking of how making this work. CPS1Q and CPS2 use a 16 byte array to send sound codes and Q-SOUND through the first 16 bytes of the shared RAM area. example: code 0x0ff0 => 0f ff 00 00 00 ff 00 xx 00 00 00 00 00 ff ff ff xx let 68k side know if anything...
  3. l_oliveira

    Hi there

    Some of you already know me from other forums. I am from Brazil, I like retro gaming stuff (I'm very eclectic with the stuff I play with) with particular interest on stuff like SEGA, Capcom, Konami and Namco arcade games. Also, I am one of the folks making the decrypted CPS2 roms which are...