Question Downgrading within same e-fuse set

Discussion in 'Switch - Exploits, Custom Firmwares & Soft Mods' started by metaljay, Sep 16, 2018 at 6:19 PM.

  1. metaljay
    OP

    metaljay GBAtemp Regular

    Member
    3
    Jan 10, 2012
    Is it possible to downgrade within the same fuse group?
    E.g 3.02, 3.01 to 3.0?
    Or 4.0 to 4.1?

    I get you can’t downgrade if burnt fuses but not each firmware has different fuses
     
  2. Draxzelex

    Draxzelex GBAtemp Guru

    Member
    14
    Aug 6, 2017
    United States
    New York City
    Yes, use ChoiDujourNX or a NAND backup to downgrade within the same fuse set and you don't have to worry about fuses being burnt if you boot OFW without RCM.
     
  3. Boomerams

    Boomerams Member

    Newcomer
    2
    Dec 16, 2016
    United States
    Technically, you can still downgrade even if fuses are burnt. You will just have to put it in RCM everytime with a payload to get it to actually boot.
     
  4. XxShalevElimelechxX

    XxShalevElimelechxX GBAtemp Fan

    Member
    4
    Mar 30, 2016
    Israel
    3.0.0 has 3 burnt efuses, 3.0.1/3.0.2 have 4 burnt efuses.
    But to answer your question, yes, it's possible, I've done it once too (2.1.0 to 2.0.0).
     
    metaljay likes this.
  5. metaljay
    OP

    metaljay GBAtemp Regular

    Member
    3
    Jan 10, 2012
    Sorry I wasn’t clear, I don’t want to use RCM every boot. essentially I’ve read the potential exploit will work under 3.01fw, my friend has 3.02 so was going to legit downgrade.

    How do I do it?
     
  6. shchmue

    shchmue GBAtemp Fan

    Member
    4
    Dec 23, 2013
    United States
    metaljay likes this.
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