It's here!

​

Info

@Normmatt has created a way to run B9S .firm files from bootrom via a DSi Flashcard and a magnet! This works on every 3DS on any firmware version.

For installation without a PC, user @TheCyberQuake has created a pack which will automatically install B9S and copy over essential starter homebrew from the flashcard's SD to the 3DS's. This will mainly be used for PC-less B9S installations. If you have a PC with you, use 3ds.guide. Read more here: https://gbatemp.net/threads/481141/

How does this work?

This works because of a flaw in the bootrom. Before the bootrom boots the NAND, it checks to see if Start+Select+X is held down, and if the shell is closed. If these requirements are met, it will boot an NDS cartridge from the bootrom. This give that cartridge bootrom access. You might be wondering how you'd hold down buttons while the shell is closed, and why you need a magnet. If you put a magnet in a specific spot on the 3DS, it will go into sleep mode. Using this, you can boot the NDS cartridge with the buttons held down while in sleep mode! Using a reflashable flashcard, you can boot B9SInstaller using the flashcard, and easily install it on your 3DS.

The 2DS doesn't need a magnet since a switch puts it to sleep instead of a magnet.

What does this mean?

1. Any 3DS model on any firmware can be hacked with minimal effort
2. You can unbrick any 3DS model from any type of brick.
   - Remember, you don't need a NAND backup for this. Just do a CTRTransfer.
   - This does not apply to MCU bricks.
3. Even consoles with fried NAND, or even the NAND chip physically removed, can use this

This is incredibly impressive stuff, and will most likely be released soon! edit: now!

FAQ

Q: Can Nintendo patch this?
A: Nope! Not without a new hardware revision.

Q: My flashcard is blocked by my firmware! Can I still use this?
A: Yes! The flashcard blacklist is not enabled on the bootrom.

Q: Why can't this work with my flashcard?
A: The installation requires you to flash NTRBoot to the flashcard's nand. Most DS flashcards, such as the original R4, have a ROM, which is not flashable.

Q: Can I install NTRBoot on my flashcard without another 3DS system?
A: If you can run NDS roms on your 3DS with it, then yes. If it's blocked on your 3DS version, then you'll need another 3DS system to use it.

Q: Will my 3DS flashcard work?
A: No, only the NDSi flashcards listed above.

Q: Will any other flash cards work?
A: Only the ones listed in the OP. However keep in mind that flashcards such as the DSTT, Supercard DS2 and R4 SDHC Dualcore are planned to be supported in the future.

Q: I tried to do this with my cartridge and it didn't work?
A: It doesn't work with regular DS cards.

Q: Can I unbrick from a ____ brick?
A: Considering the card has access to the bootrom, yes! This can unbrick any brick (except MCU), unless you've taken a knife to the motherboard.

Q: Can I install B9S on the latest firmware with this?
A: Again, since the card has access to the bootrom, you can do this easily! Just plug in your flashcard, boot up using the magnet and button combination, and install.

Q: Does this work on the New Nintendo 2DS XL?
A: Yes!

Release
Guide
Free NTRBoot Flashing
Free B9S Installations

Here is SciresM's post about this

Please see SciresM's presentation on bootromhax.​

 

[TheCyberQuake]

That's the whole idea check the previous posts on what decrypt9 can do. If people checked all the posts before asking questions there may not be a need to ask. No offense.

I'm sorry I'm not willing to read 45 pages (or ~450 posts) before asking a question.

 

[Cuphat]

Does anyone with actual info know if flashing any compatible cards with NTRBootHax would be permanent, or if we would be able to restore the card back to it's original state afterward?

Presumably, any installer should make (or ask you to make) a backup of the firmware you are replacing first so it can be restored if wanted.

 

[bakageta]

Well, decrypt9 can already back up and restore ak2i bootloaders. It will probably be more refined when ntrboothax is released, and should restore just fine. If writing ntrboothax was a one way deal, it would be really impractical / expensive to actually develop.

 

[Omegapsy]

Well, decrypt9 can already back up and restore ak2i bootloaders. It will probably be more refined when ntrboothax is released, and should restore just fine. If writing ntrboothax was a one way deal, it would be really impractical / expensive to actually develop.

Even if the flash using decrypt9 was one way, you can always use the ak2i bootloader flashers to "restore" the card.

 

[Shadicluigi]

My 3DS has been bricked since Jan 5 2016, I turned it off during the downgrade (memchunkhax). Specifically during the deleting nand part. Will this work?

 

[Cuphat]

My 3DS has been bricked since Jan 5 2016, I turned it off during the downgrade (memchunkhax). Specifically during the deleting nand part. Will this work?

This, plus a CTRTransfer in GodMode9 should work, assuming nothing else is wrong with it.

 

[Lacius]

My 3DS has been bricked since Jan 5 2016, I turned it off during the downgrade (memchunkhax). Specifically during the deleting nand part. Will this work?

You should be able to use this method to unbrick and install boot9strap.

 

[Vieela]

Any new information about this? Really want to know if both consoles need to be in the same region );;

 

[Deleted member 381889]

Any new information about this? Really want to know if both consoles need to be in the same region );;

w-why would they need to be both the same region? No lol

 

[Vieela]

w-why would they need to be both the same region? No lol

Ah ok. Thank ya!

 

[Snooli]

Ah ok. Thank ya!

Only that one of them has to be CFWed.

 

[TheCyberQuake]

w-why would they need to be both the same region? No lol

This exploit runs before region locking afaik.

 

[gamesquest1]

Ntr/nds games don't have region locking anyway

Plus there would be no point adding region requirements to a in-house repair tool

 

[zaqqaz00]

That's the whole idea check the previous posts on what decrypt9 can do. If people checked all the posts before asking questions there may not be a need to ask. No offense.

Offense taken.
Please don't be a cop, leave that to the professional dough-nut eaters. If a post bothers you go to the next page or close your eyes. Let people ask what they want.

 

[Starzcream]

Offense taken.
Please don't be a cop, leave that to the professional dough-nut eaters. If a post bothers you go to the next page or close your eyes. Let people ask what they want.

Redundancy is starting to get remedial.

 

[zaqqaz00]

Redundancy is starting to get remedial.

If

No doubt, so why do you persist with said nonsense

 

[Starzcream]

If

No doubt, so why do you persist with said nonsense

I'm a "cop" now because I politely said stop being lazy. I'm actually waiting for a release like most people at this point...

 

[zaqqaz00]

I'm a "cop" now because I politely said stop being lazy. I'm actually waiting for a release like most people at this point...

Asking someone not to be """"LAZY"""" is certainly not being polite and is offensive to others.

 

[TheCyberQuake]

Asking someone not to be """"LAZY"""" is certainly not being polite and is offensive to others.

This. Any sane person isn't going to try to search 900 posts for a single answer (my original math was wrong). It isn't lazy to not read 900 posts. I tried using the thread search but couldn't find anything relevant to my exact question (imo the search tool for this website just never works well anyway)

 

[ivoyko]

U guys should shut up and dont get more trash here.