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.​

 

[lone_wolf323]

The difficulty here is that it's a bricked N3DS :\

It was bricked when I downgraded the console with a O3DS 9.2 fiirmware back in January 2016, so I'm actually wondering if the 3DS is like "MCU'd" from this N3DS downgrade with an O3DS firmware...

Had you done a 2.1.0 transfer while trying to put a9lh on the system and went into sleep mode on the console?

 

[gamesquest1]

The difficulty here is that it's a bricked N3DS :\

It was bricked when I downgraded the console with a O3DS 9.2 fiirmware back in January 2016, so I'm actually wondering if the 3DS is like "MCU'd" from this N3DS downgrade with an O3DS firmware...

Just try putting the magnet in different positions and pressing the power button until it doesn't turn on, just line it up with exactly where the speaker meets when you close the lid, you may also need a more powerful/bigger magnet

 

[Xeonhawk]

I tried this, nothing more, here is how I do :

- putting the R4 wIth a paper on the sticker side to push the connectors
- putting the magnet between A and B (found that it was the main place to put it for N3DS), also tried on the right of Start & Select
- pressing X+Start+Select+Power during some seconds
- nothing

The blue led is on, not blinking. I can power the 3DS with the magnet on without the button cominaison, is it logical ?

I tried everything with the micro SD, Fat 16 Fat 32, don't know if it's the SD fault...

The R4 works on an O3DS so i'm out of ideas for now... :\

Try double folding the paper so it really pushes against the n3ds contacts.

 

[Snooli]

Just try putting the magnet in different positions and pressing the power button until it doesn't turn on, just line it up with exactly where the speaker meets when you close the lid, you may also need a more powerful/bigger magnet

IDK, my brick turns the blue light on when I try to power it up while it's closed...

 

[dodol]

if I bought R4i Gold 3DS Starter and flashed it in dslite, I can use it on any 2DS/3DS with any firmware right ?

 

[Snooli]

if I bought R4i Gold 3DS Starter and flashed it in dslite, I can use it on any 2DS/3DS with any firmware right ?

Yes

 

[Bidouilleur]

IDK, my brick turns the blue light on when I try to power it up while it's closed...

Same here man.

Just try putting the magnet in different positions and pressing the power button until it doesn't turn on, just line it up with exactly where the speaker meets when you close the lid, you may also need a more powerful/bigger magnet

That's the part I don't understand, the console led is turning on even when the lid is closed so I don't undestand, I will try more

Are O3DS different than N3DS on that ?

Had you done a 2.1.0 transfer while trying to put a9lh on the system and went into sleep mode on the console?

No, I bricked it on the 9.2 downgrade, no MCU brick in my case

 

[Xeonhawk]

Same here man.



That's the part I don't understand, the console led is turning on even when the lid is closed so I don't undestand, I will try more

Are O3DS different than N3DS on that ?



No, I bricked it on the 9.2 downgrade, no MCU brick in my case

Have you tried putting paper under the cart? You might be having contact issues.

 

[Snooli]

Have you tried putting paper under the cart? You might be having contact issues.

Guys, the issue isn't there. If it's not supposed to turn on with the lid closed, than our problem is waaayyy deeper. This is not an issue of the NTR card, we can't even get that far.

 

[Quantumcat]

Guys, the issue isn't there. If it's not supposed to turn on with the lid closed, than our problem is waaayyy deeper. This is not an issue of the NTR card, we can't even get that far.

If it is an N3DS it will turn on with the lid closed, right into sleep mode.

 

[TheCyberQuake]

Guys, the issue isn't there. If it's not supposed to turn on with the lid closed, than our problem is waaayyy deeper. This is not an issue of the NTR card, we can't even get that far.

For n3ds it will still boot. The problem is probably that the magnet is too weak or isn't in the correct spot. I only own a few magnets that work properly.

 

[windwakemeupinside]

Good job on this, been waiting a long time for the release and can't wait to try it out once I get my hands on a non-hacked 3ds. Kudos to all y'all who worked on this!

 

[Bidouilleur]

If it is an N3DS it will turn on with the lid closed, right into sleep mode.

Okay so I should try to find some more powerful magnets (those that I own seems kinda powerful but maybe my N3DS require more power than the O3DS does).

Thanks for your replies guys, I now know that my N3DS is not broken because it's turning on with the lid closed, some hope is coming back again

 

[zoogie]

For n3ds it will still boot. The problem is probably that the magnet is too weak or isn't in the correct spot. I only own a few magnets that work properly.

This is a bigger issue than people realize. The magnet sensor location varies based on the 3ds, and different magnets can have weird magnetic fields based on their shape, size, or construction. I would recommend small button type magnets like these to reduce ambiguity and sweet spot guesswork.

Generally use the smallest magnet you can and hold it over the B button (usually the best spot for many models - but experiment). If an old3ds, rest it on the 3ds and try to turn it on. If the 3ds doesn't turn on, you've hit the sweet spot, so go ahead and do ntrboothax without moving it.

If a new3ds, turn the system on and place the magnet around the B button. Make sure it puts the 3ds to sleep and that it stays asleep. Then go ahead and do ntrboot without moving the magnet.

 

[Timburpton]

Just out of curiosity, where's the sensor location for the O3DS and O3DS XL? I know the N3DSXL it is to the right of the start/select buttons

 

[dodol]

anyone know if old revision R4i 3DS gold (the one that's only compatible up to firmware 5.xx) will be flashable ?

 

[Lindorel]

Ntrboot hax works to fix OTP brick? Because I've a 3ds with this issue. Any tutorial or tool to do this?

Thanks!

 

[Quantumcat]

Ntrboot hax works to fix OTP brick? Because I've a 3ds with this issue. Any tutorial or tool to do this?

Thanks!

Install b9s then use Decrypt9 to do a 9.2 CTR transfer.

 

[zoogie]

anyone know if old revision R4i 3DS gold (the one that's only compatible up to firmware 5.xx) will be flashable ?

Check the back of the card above the far right pin for a number. I've got a rev 5 which can work (with some help).
Rev 6 isn't working yet. 7,4 unknown, 8+ should work with existing flasher.

 

[Ivan990]

Install b9s then use Decrypt9 to do a 9.2 CTR transfer.

Sorry for bother, but I have two 3DS consoles brick by otp and i tried several times to fix them, but Ntrboothax doesn't run the SafeB9SInstaller.

I don't know what I should do...