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.​

 

[Deleted member 381889]

This will also fix the softbrick from tubehax? I can boot into the 3DS but cannot run the system update due to tubehax.

That's not even a brick.
Not sure how TubeHax works, but I'm assuming that's an issue with DNS.
Remove your TubeHax DNS, and if you haven't already, install B9S here
Then after that, you can update to the latest firmware.

 

[BARNWEY]

You basically need an exploit for the DSTT card itself to write custom header data to run on it, there's no way otherwise to get something like NTRCardhax to run on a DSTT. Same for the R4.

That is, if you can even write custom header data to it.

I understand that, that's why I said

If Normatt somehow makes it compatible with the R4, or the DSTT, I would be very hyped XD

 

[Joom]

This will also fix the softbrick from tubehax? I can boot into the 3DS but cannot run the system update due to tubehax.

Yes. Also, apparently it's not "ntrcardhax". I guess the name has yet to be determined.

 

[Eliot15]

Yeeeey

 

[KiraYamatoSD]

That's not even a brick.
Not sure how TubeHax works, but I'm assuming that's an issue with DNS.
Remove your TubeHax DNS, and if you haven't already, install B9S here
Then after that, you can update to the latest firmware.

Yes. Also, apparently it's not "ntrcardhax". I guess the name has yet to be determined.

Sorry for not clarifying. The brick was caused by the partial downgrade, but due to not removing tubehax, the system cannot access the system setting nor complete the system update to restore the 3ds.

 

[Joom]

Sorry for not clarifying. The brick was caused by the partial downgrade, but due to not removing tubehax, the system cannot access the system setting nor complete the system update to restore the 3ds.

Yes, it can fix that as it'll allow you to perform a ctrtransfer to a clean firmware.

 

[Mistie]

Sorry for the kind of stupid question but im trying to see if this works on a n3ds thats currently bricked but it doesnt seem to boot retail carts, is this normal? Does it have to be a modded cart to boot it? and the N3DS boots with the lid closed anyways. So does this even work on n3ds?

 

[daxtsu]

Sorry for the kind of stupid question but im trying to see if this works on a n3ds thats currently bricked but it doesnt seem to boot retail carts, is this normal?

As far as I understand, yes, the cart has to be specially modified, so a regular retail cartridge game won't work.

and the N3DS boots with the lid closed anyways. So does this even work on n3ds?

You just stick a magnet by the start/select buttons, and voila, it should, with the proper cart.

 

[Joom]

Sorry for the kind of stupid question but im trying to see if this works on a n3ds thats currently bricked but it doesnt seem to boot retail carts, is this normal? Does it have to be a modded cart to boot it? and the N3DS boots with the lid closed anyways. So does this even work on n3ds?

Yes, it works on an N3DS. And yes, it requires a custom flashed flashcart.

 

[IssMare]

I'm almost crying right now.
I could buy a bricked 3ds and repair it then, or correct me if I'm wrong.

 

[Joom]

I'm almost crying right now.
I could buy a bricked 3ds and repair it then, or correct me if I'm wrong.

No you're right.

 

[NoNAND]

THE CURSE IS BROKEN !!!!!!! FOREVER

 

[Deleted member 381889]

Sorry for not clarifying. The brick was caused by the partial downgrade, but due to not removing tubehax, the system cannot access the system setting nor complete the system update to restore the 3ds.

Install B9S using this guide, and then do a CTRTransfer using this guide.

 

[Kartik]

Does this work on a 2ds?

 

[Shawnj]

This will also fix the softbrick from tubehax? I can boot into the 3DS but cannot run the system update due to tubehax.

Go to internet settings, choose advanced options, and change your 3DS's DNS servers to 8.8.8.8 and 8.8.4.4 . This will disable Tubehax, but should fix any issues updating.

Or, if you have CFW, you can use 11.3 CTRNAND transfer images to upgrade, which should work in basically any instance. Look here: https://github.com/adrifcastr/3Down

 

[Deleted member 381889]

Does this work on a 2ds?

Yes.

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

Go to internet settings, choose advanced options, and change your 3DS's DNS servers to 8.8.8.8 and 8.8.4.4 . This will disable Tubehax, but should fix any issues updating.

Or, if you have CFW, you can use 11.3 CTRNAND transfer images to upgrade, which should work in basically any instance. Look here: https://github.com/adrifcastr/3Down

They have a frankenfirmware. Changing their DNS won't help.

 

[Spore2]

Makes me wonder how to do this on a 2DS since it doesn't turn on with the sleep switch on.

 

[Deleted member 381889]

Makes me wonder how to do this on a 2DS since it doesn't turn on with the sleep switch on.

Holding Start+Select+X bypasses this.

 

[Spore2]

I hope this can revive a stock 2DS that went black screen despite being untouched by hacks.

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

Will the Gateway blue card work with this?

 

[CarlangasLVDC]

At first, I thought it was a joke, this is so amazing!