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.​

 

[Snooli]

Ok, here's a piece of one of the screenshots

 

[Matthew]

Anyone tried this on a DSi? Wonder if it also has the same hidden behaviour.

 

[wiiarctus]

Anyone tried this on a DSi? Wonder if it also has the same hidden behaviour.

Works on my DSi^^

 

[ItsMetaKnight]

I can't seem to get it to work with my magnets, or I'm too confused.
How do you actually test this without the correct NTR card? What is supposed to happen when you turn it on with the magnet and key combination?

 

[Deleted member 381889]

I can't seem to get it to work with my magnets, or I'm too confused.
How do you actually test this without the correct NTR card? What is supposed to happen when you turn it on with the key combination?

You can't use this at the moment. It's not released yet.

 

[ItsMetaKnight]

You can't use this at the moment. It's not released yet.

I know that... I was asking how to see if it WOULD work with the magnets I have? See also:

Works on my DSi^^

How does he know it works?

I'm getting a N2DSXL and I want to test it when it's here.

 

[yacepi15]

Anyone tried this on a DSi? Wonder if it also has the same hidden behaviour.

I'll try.

 

[wiiarctus]

You can't use this at the moment. It's not released yet.

But very Soon™?^^

 

[Deleted member 381889]

I know that... I was asking how to see if it WOULD work with the magnets I have? See also:

How does he know it works?

I'm getting a N2DSXL and I want to test it when it's here.

Turn on your 3ds and put a magnet around the B button. If it goes into sleep mode, your magnet works.

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

But very Soon™?^^

Don't ask me, I didn't make it

 

[RedBlueGreen]

AK2i will work with this, as confirmed by Normmatt himself. @Lia You may want to add that to the OP.
Seems that it also requires a flasher currently, but that it could technically be done with a 3DS homebrew.

Someone should ask him if it's possible to back up the original firmware of a flashcart so you can reflash it after unbricking the 3DS. I don't know how easy/possible it would be though.

 

[Gamer4647]

Turn on your 3ds and put a magnet around the B button. If it goes into sleep mode, your magnet works.

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


Don't ask me, I didn't make it

When I tried doing sleep mode with another DS systems speakers (which is awkward to do), it worked best around the hinge for me.

 

[ItsMetaKnight]

Turn on your 3ds and put a magnet around the B button. If it goes into sleep mode, your magnet works.

Gah, that's not what I want to know...
My magnet does put it into sleep, even if I use the very old DS lite as a magnet, but I want to know what happens if you try this procedure without a NTR card. My fridge magnet is pretty big and I can barely reach the buttons when it's on it. Nothing unusual happens when I power on the device with the button, so I want to know if that's normal.........

 

[Snooli]

Ok, here's a piece of one of the screenshots

Someone should ask him if it's possible to back up the original firmware of a flashcart so you can reflash it after unbricking the 3DS. I don't know how easy/possible it would be though.

 

[Deleted User]

Someone should ask him if it's possible to back up the original firmware of a flashcart so you can reflash it after unbricking the 3DS. I don't know how easy/possible it would be though.

I believe he wanted to make something to back it up to reuse it for DS puroses

 

[Gamer4647]

Gah, that's not what I want to know...
My magnet does put it into sleep, even if I use the very old DS lite, but I want to know what happens if you try this procedure without a NTR card. My fridge magnet is pretty big and I can barely reach the buttons when it's on it. Nothing unusual happens when I power on the device with the button, so I want to know if that's normal.........

You need to hold X, Start, Select, and Power. If you can't each them, the only suggestion is to try using it in a different area.

 

[Deleted member 381889]

Gah, that's not what I want to know...
My magnet does put it into sleep, even on the very old DS lite, but I want to know what happens if you try this procedure without a NTR card. My fridge magnet is pretty big and I can barely reach the buttons when it's on it. Nothing unusual happens when I power on the device with the button, so I want to know if that's normal.........

If you have an o3ds, the 3DS cannot boot in sleep mode or with a magnet on it.
If you hold Start+Select+X with a magnet, it will boot.
If you hold Start+Select+X with a magnet and custom DS Card, it will boot the DS Card.

With a N3DS, it can boot in sleep mode.

 

[ItsMetaKnight]

If you have an o3ds, the 3DS cannot boot in sleep mode or with a magnet on it.
If you hold Start+Select+X with a magnet, it will boot.
If you hold Start+Select+X with a magnet and custom DS Card, it will boot the DS Card.

With a N3DS, it can boot in sleep mode.

ok thanks

 

[Snooli]

Good morning blujay. List through last few pages. We started posting stuff from yesterday's IRC session

 

[Gamer4647]

If you have an o3ds, the 3DS cannot boot in sleep mode or with a magnet on it.
If you hold Start+Select+X with a magnet, it will boot.
If you hold Start+Select+X with a magnet and custom DS Card, it will boot the DS Card.

With a N3DS, it can boot in sleep mode.

Even with a magnet it won't boot?
Derp.

 

[Deleted member 381889]

Even with a magnet it won't boot?
Derp.

gg