Nintendo detection of flashcard : how-to ?

Discussion in '3DS - Flashcards & Custom Firmwares' started by OuahOuah, Sep 16, 2013.

  1. OuahOuah
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    OuahOuah GBAtemp Maniac

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    Hello.

    Have a really simple question : how does the 3DS detects a flashcard is used ?

    Test on launch ?
    What is the "answer" expected from 3DS that is not correct from flashcard ?
     
  2. FAST6191

    FAST6191 Techromancer

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    The full answer to that question is actually not simple would involve teaching you hacking in full. Ignoring things like checks to the game manual of older games the short answer is differences to what it expects to be there. Said differences usually come about as a result of cryptography (a field of applied maths that relies on the concept that certain operations are easy to initially do and check the result of but hard to go backwards in) or hardware/protocol differences to what is expected (more current drawn, slower read speeds, faster read speeds, improper response to certain commands, something in memory that should not be there, something not in memory that should be there.....).

    From what we know the gateway is an exploit driven device so Nintendo patched (and maybe protected against future versions of) the exploit used in newer firmware versions, they then made an incentive to update by blocking certain online options in newer firmwares and by making newer games require the newer firmwares.

    The DS flash cart stuff was and still largely is http://hackmii.com/2010/02/lawsuit-coming-in-3-2-1/ . More recently they added save type checking and they expanded the scope of some of those checks too so they happen a several points during runtime.
     
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  3. OuahOuah
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    OuahOuah GBAtemp Maniac

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    Wow.
    Thanks for the answer :)