Want to start "decoding" files.

Discussion in 'Wii - Hacking' started by WiiFan2012, Mar 2, 2010.

  1. WiiFan2012

    WiiFan2012 GBAtemp Regular

    Dec 1, 2009
    United States
    I would like to start decoding Wii files to program a hacking program, like the SZS Modifier.

    Where do you recommend I begin?

  2. FAST6191

    FAST6191 Techromancer

    pip Reporter
    Nov 21, 2005
    United Kingdom
    Not sure what level we are playing at here but I will be assuming you can decode the files from the iso into a "plaintext" format.

    Wii standards vary a bit from older systems owing to increased memory capabilities and the like, still many are very similar to the GC stuff which has a fair few documented formats:
    Chapter 15.

    Many games use "SDK" formats (in fact of those that I have pulled apart or others have documented it is a surprisingly high number compared to other systems past and present) so you can infer some stuff from those projects. This path is very perilous though- witness much of the DS, early DS stuff used a lot of SDK like data which then shifted later in the life of the DS leaving several people in an awkward position.
    An easy way to see what I am talking about would be to look at the DS formats:
    See how most will have a magic string identifier, file length, header data and so on in approximately the same order.

    Compression will likely be an issue on the wii, most is a variant of LZSS, RLE, huffman or one of the many other "common" formats.

    I might also suggest looking into the DS as hacking there is far more developed that the wii.

    After that it is relatively simple coding, just pick a language that supports binary manipulation easily as not too much can be done with "known" data structure languages.
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