Downgrade 3ds with arm9loaderhax

Discussion in '3DS - Flashcards & Custom Firmwares' started by sebamendoza201x, Oct 31, 2016.

  1. sebamendoza201x
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    sebamendoza201x Advanced Member

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    Its possible to downgrade a 3ds with arm9loaderhax installed?
     


  2. Aletron9000

    Aletron9000 3DS Master

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    I would flash sysnand to emunand, downgrade emunand, and then flash emunand to sysnand

    I was having a conversation with someone earlier about this, he said even this method is risky because it hasn't been tested.

    you could always try a CTRNAND transfer.

    why would you need to downgrade on a9lh anyway?
     
  3. Alex658

    Alex658 GBAtemp Maniac

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    Why would you want to do this? Restore a nand dump from before you had a9lh (if you made any in 9.2 or something), choose the option to SYSNAND restore (keep a9lh) from hourglass9.
    I believe the normal way of downgrading doesn't work once you have a9lh, if you try the dsiware method, you will not only uninstall a9lh, but brick as well. You'd write garbage to firm0/1.
    Not sure if a CTR transfer works and keeps a9lh.
     
  4. sebamendoza201x
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    sebamendoza201x Advanced Member

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    because my new 3ds has a problem with touch and buttons.
     
  5. Alex658

    Alex658 GBAtemp Maniac

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    What does this have to deal with a9lh? Did you drop it after you got a9lh? Have you tried to recalibrate the screen?
     
  6. sebamendoza201x
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    sebamendoza201x Advanced Member

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    i got after a9lh, because in the store they upgrade badly the firmware
     
  7. KunoichiZ

    KunoichiZ GBAtemp Guru

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    How is downgrading your firmware going to fix your hardware problems?
     
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  8. sebamendoza201x
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    sebamendoza201x Advanced Member

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  9. Alex658

    Alex658 GBAtemp Maniac

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    Just wondering, was this 3ds downgraded via hardmod? If so, it's possible they screwed some things up in your motherboard, no downgrade would fix this.

    If the 3ds was wrongly hardmodded, they might have broken some stuff.
     
  10. sebamendoza201x
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    sebamendoza201x Advanced Member

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    but why only works in fbi, in fbi the buttons and the touch works perfect and no, no hardmod in the process.
     
  11. KunoichiZ

    KunoichiZ GBAtemp Guru

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    I understand that that might be the case, but still. Downgrading the firmware will not fix the hardware problems.
     
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  12. Alex658

    Alex658 GBAtemp Maniac

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    This is odd... Are you completely sure it works ONLY in fbi? try other homebrew apps or games.
     
  13. sebamendoza201x
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    sebamendoza201x Advanced Member

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    i injected homebrew launcher and tinyformat and decrypt9wip and emunand9 in arm9loader works
     
  14. Shabutie78

    Shabutie78 GBAtemp Fan

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    for the record, I've used plaisysupdater to downgrade my two A9LH 11.1 New 3DS' back to 9.2 because I wanted a 9.2 NAND backup for them. then upgraded them back to 11.1.
     
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  15. Alex658

    Alex658 GBAtemp Maniac

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    AFAIK, luma3ds re-enables svchax, disables the hardcoded minimum title list which helps you downgrade again, i'm not sure if it enables memchunkhax2.1 as well.
     
  16. el_gonz87

    el_gonz87 GBAtemp Advanced Maniac

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    LOL, did you delete the 9.2 backups created as part of plailect guide?

    When you finished the A9LH guide you should have had 2 backups:
    1) Pre A9LH install 9.2
    2) Post A9LH install 11.2

    Did you delete the 9.2??? Just use that to re-flash, that should be the last working NAND you have.
     
  17. Aletron9000

    Aletron9000 3DS Master

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    memchunkhax2.1 = svchax, I think. Both are arm11 kernel exploits but work on different firmwares.
     
  18. Alex658

    Alex658 GBAtemp Maniac

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    Yes, but I'm unsure of how it works, I know that svchax re-enables svc_backdoor function, what i'm not sure of is if this function is renabled to be able to use memchunkhax2.1 past 10.4, because i think mch2.1 got patched after 10.3.
     
  19. Aletron9000

    Aletron9000 3DS Master

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    3DS ARM9 CPU
    I think I heard this somewhere (and partially guessing from the name)

    memchunkhax2.1 rewrites memory to allows for arm11 kernel
    svchax uses svc_Backdoor which allows for arm11 kernel
     
  20. sebamendoza201x
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    sebamendoza201x Advanced Member

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    i tried with ctr transfer but stills buttons and touch not working. also in decrypt9wip is working all the buttons.