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.​

 

[Diego788]

 

[Deleted member 381889]

If it's any type a brick, would it fix the 6.x 2ds soft brick? Because I don't see how this will do that.

Yes! Any type of brick!

 

[Deleted User]

If it's any type a brick, would it fix the 6.x 2ds soft brick? Because I don't see how this will do that.

Simple. Boot into NDS cart, inject 9.2 CTRNAND, presto

 

[Deleted member 381889]

-snip-
nvm

 

[Mark McDonut]

This is amazing, Normmatt is awesome.

I wonder how this works in reference to the ds whitelist, I'm excited to find out.

 

[Sonic Angel Knight]

I am curious what is considered a "brick" I have a system that can boot payloads and luma config. But when booting normal system menu, is just a black screen with the music playing, then it freezes after a few seconds. Is that a problem of a brick?

 

[Deleted User]

Wait, so could this undo my brick of installing the wrong NAND? AFAIK, a CTRNAND transfer won't fix my idiocy

 

[Deleted member 381889]

This is amazing, Normmatt is awesome.

I wonder how this works in reference to the ds whitelist, I'm excited to find out.

Pretty sure the DS Whitelist is part of the OS, not the BootROM.

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

I am curious what is considered a "brick" I have a system that can boot payloads and luma config. But when booting normal system menu, is just a black screen with the music playing, then it freezes after a few seconds. Is that a problem of a brick?

You don't need this to fix it. Have you tried doing a CTRTransfer?

 

[Deleted User]

I am curious what is considered a "brick" I have a system that can boot payloads and luma config. But when booting normal system menu, is just a black screen with the music playing, then it freezes after a few seconds. Is that a problem of a brick?

EDIT: ninja'd

 

[rileysrjay]

Here's my prayer to the almighty developer's of the 3ds scene that my r4i gold card will be able to do this soon.

 

[Deleted User]

Pretty sure the DS Whitelist is part of the OS, not the BootROM.

You're right.

 

[Mark McDonut]

Pretty sure the DS Whitelist is part of the OS, not the BootROM.

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


You don't need this to fix it. Have you tried doing a CTRTransfer?

Even better! would be awesome if my cyclods or acekard 2i end up supported, I could help with bricks.

 

[Deleted member 381889]

Even better! would be awesome if my cyclods or acekard 2i end up supported, I could help with bricks.

Acekard 2i is supported.

 

[APartOfMe]

Even better! would be awesome if my cyclods or acekard 2i end up supported, I could help with bricks.

acekard 2i is supported
lia got there before me

 

[Deleted User]

Even better! would be awesome if my cyclods or acekard 2i end up supported, I could help with bricks.

Not if I beat you to it!

 

[Firion Hope]

Wow this is amazing! Needed some good news to counter the mass bannings.

I wonder how many people trashed their bricked 3DS's and are kicking themselves now

 

[Deleted User]

Wow this is amazing! Needed some good news to counter the mass bannings.

I wonder how many people trashed their bricked 3DS's and are kicking themselves now

Lucky for me, I didn't. Unfortunately for me, I bought a new 3ds and now won't be able to sell this one.

 

[APartOfMe]

Wow this is amazing! Needed some good news to counter the mass bannings.

I wonder how many people trashed their bricked 3DS's and are kicking themselves now

millions, maybe even billions.

 

[Sonic Angel Knight]

You don't need this to fix it. Have you tried doing a CTRTransfer?

Yes, it was suggested by various people to perform a 9.2 CRT transfer with decrypt9 but it did not work.

 

[Dionicio3]

millions, maybe even billions.

Ok, it's nowhere near that