F Zero X

F-Zero X is a rebooter game. It loads a portion of code from disk, disables N64 OS and executes it.

Technical Details

• The game checks for the following 64DD units:
  • Japanese Retail Unit (Japan)
  • American Retail Unit (USA)
  • Development Unit (All)
• The game checks for the following Disk Game Codes:
  • Checks if the Company Code is 01 (Nintendo).
  • Checks if the last 3 letters of the Game Code are FZJ (Japan) or FZE (USA).
  • Checks if the first letter of the Game Code is between E to Z.
• The game performs the following when a F-Zero X Expansion Disk is detected (function 800FC300 in JP version):
  • Load LBA 833 to 80600000.
    The format is the following:

    00: IIIIIIII SSSSSSSS EEEEEEEE RRRRRRRR
    10: ???????? ???????? ???????? ????????
    20: ???????? ???????? ???????? ????????
    
    IIIIIIII = Loading Method?
    SSSSSSSS = LBA Start
    EEEEEEEE = LBA End
    RRRRRRRR = RAM Load Address & Entrypoint
    

  • Load from <LBA Start> to <LBA End> at RAM Load Address.
  • If 800FC5C0 is 0 then other things may happen with IIIIIIII (however it is always 1..?)
  • Decrypt and boot the loaded code at described entrypoint address via LeoBootGame function (800BB540 in JP version).
    • The first 0x100 bytes of the loaded code are encrypted. See 64ddutils' bootcodecrypto.c for the crypto process.