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.​

 

[dpad_5678]

This also means that

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
3. Even consoles with fried NAND, or even the NAND chip physically removed, can use this

Bloody fucking hell.

 

[ShadowOne333]

Now make an unbanning method using magnets!

 

[Deleted User]

No, it must be a custom card, for example, a flashable DS Flashcard.

OK. Thanks. I was getting worried that my 3ds was completely bricked.

 

[Deleted member 381889]

OK. Thanks. I was getting worried that my 3ds was completely bricked.

This works with any type of brick. I stated this in the OP.

 

[Deleted User]

Now make an unbanning method using magnets!

Just in the scenario this isn't sarcasm: it won't work. This is a bootROM exploit.

 

[dpad_5678]

My mind is actually fucking blown.

 

[Deleted User]

This works with any type of brick. I stated this in the OP.

I know but there was just that feeling

 

[Deleted member 381889]

My mind is actually fucking blown.

It's pretty crazy, yeah, haha.

 

[APartOfMe]

i'm actually more excited for this than i was for sighax!

 

[Dionicio3]

This works with any type of brick. I stated this in the OP.

Does it work with the "shattered motherboard" brick?

 

[HaouIngvalt]

Normmatt is an omnipotent badass anime protagonist. There is no other explanation. This method is practically divine (very nonsense) but divine!

 

[DeslotlCL]

Holy cheese, i will be able to install boot9strap once again since my mistake with decrypt9wip.

Thank you so much people from the 3ds scene.

 

[Dionicio3]

Normmatt is an omnipotent badass anime protagonist. There is no other explanation. This method is practically divine (very nonsense) but divine!

...? What even?

 

[DeoNaught]

Just damn

 

[CitizenSnips]

I feel like purposefully bricking my 3ds just to do this when it releases

 

[APartOfMe]

I feel like purposefully bricking my 3ds just to do this when it releases

same, maybe the n3ds 2.1 brick?

 

[Deleted User]

Does it work with the "shattered motherboard" brick?

Probably not. Now, does it work with this brick:

 

[Deleted member 381889]

same, maybe the n3ds 2.1 brick?

brb deleting my entire CTRNAND in GodMode9

--------------------- MERGED ---------------------------

Does it work with the "shattered motherboard" brick?

That doesn't count lol

 

[APartOfMe]

brb deleting my entire CTRNAND in GodMode9

see you soon

 

[Deleted User]

brb deleting my entire CTRNAND in GodMode9

Yes because we don't know if this will be released in a week, or a month