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]

Just gonna say that I'm in a place with no wifi, have very little data left, and my data resets on the 15th. I won't be able to answer any questions or update the OP until then.

 

[KeyMerVin]

Just gonna say that I'm in a place with no wifi, have very little data left, and my data resets on the 15th. I won't be able to answer any questions or update the OP until then.

Dont worry ^^

 

[repulse]

DSTT doesn't work, right ?

 

[sion_zaphod]

how long does restoring flash take. Been doing it for 15 minutes and doesnt show any signs of stopping soon

 

[jerbear64]

For people who keep asking if a flashcart is supported:

Is it on the list? No? Then it won't work. The only exceptions so far are the r4idsn (1:1 R4i Gold clone) and R4i Ultra (1:1 Acekard 2i clone by Team Acekard themselves), but it's pretty much the same card as the R4i Gold 3DS RTS.

Here's the list that was created on the Nintendo Homebrew server. With the exception of the r4idsn and the R4i Ultra, if your card is under "Incompatible" either it's being worked on but isn't supported yet, or it's just not supported and there are no plans to support it. For the incompatible carts with a year on it, the year doesn't matter as long as everything else matches.
If a cart isn't on this list, it's most likely incompatible.

Spoiler: Compatibility Chart

 

[Columbo2811]

For people who keep asking if a flashcart is supported:

Is it on the list? No? Then it won't work. The only exception so far is the r4idsn, but it's pretty much the same card as the R4i Gold 3DS RTS.

Here's the list that was created on the Nintendo Homebrew server. With the exception of the r4idsn, if your card is under "Incompatible" either it's being worked on but isn't supported yet, or it's just not supported and there are no plans to support it. For the incompatible carts with a year on it, the year doesn't matter as long as everything else matches.
If a cart isn't on this list, it's most likely incompatible.

Spoiler: Compatibility Chart

That still won't help. Remember these idiots that keep asking are the same idiots that are needing to unbrick a bricked console probably from not being able to read instructions in the first place.

 

[laharl22]

I have a dstwo and one r4sdhc dual core i waiting with impatience

 

[BADDINOROX99]

The OP is pretty clear on which cards are supported. I don't get why half the posts in this thread are asking about cart compatibility when all the info is there.

Does OP say it's supported? Seriously you can't take 2 seconds to even read OP to find your answer (which is no by the way)
Edit: it isn't supported yet, and isn't even a planned card. So for now no. Maybe in the future, but not currently

I was asking this because the gateway blue card is a knock off of the r4i gold from what I know

maybe I should have asked differently and been more specific if I knew asking would be an insult to your existence apparently

 

[Majickhat55]

I was asking this because the gateway blue card is a knock off of the r4i gold from what I know

maybe I should have asked differently and been more specific if I knew asking would be an insult to your existence apparently

So try to dump a backup, *hax* will tell you whether or not the card is supported so if it's truly a clone of a supported card it will be read as such. At least according to at least two people that had Acekard2i clones and it apparently recognized them as said cards. If it did though I guess it would be an "at your own risk" thing if you decided to try to install it since there is low chance it could brick.

 

[Deleted User]

I'm sure some company like Gateway will take benefit of the lack of flashcart compatibility, to make one hahaha
So i will just wait for it ! (You should do the same, people ! )

 

[aarti]

I just own the DSTT, which hasen't worked for years, only on my old NDS. But my neighbor has a R4i RTS 3DS, so I will use this to use ntrhax when I'm back from holidays.

 

[Luglige]

So... When are they going to mass produce these things? I don't have a second console...

 

[Agent Moose]

It says you can still use this even if you dont have a nand chip. Im curious on how that works. Would it still boot the 3ds like normal? Or can the only thing you do is load b9s and nothing else? Ive just never heard of aomething like that, so i am curious.

 

[dpad_5678]

It says you can still use this even if you dont have a nand chip. Im curious on how that works. Would it still boot the 3ds like normal? Or can the only thing you do is load b9s and nothing else? Ive just never heard of aomething like that, so i am curious.

It'll boot EmuNAND off the SD card most likely.

 

[gamesquest1]

It says you can still use this even if you dont have a nand chip. Im curious on how that works. Would it still boot the 3ds like normal? Or can the only thing you do is load b9s and nothing else? Ive just never heard of aomething like that, so i am curious.

It's kinda more of a impractical truth, with this you could boot directly to Emunand even if the nand was ruined, but it would be kinda impractical as it would mean always having the ntrboot cart inserted and doing the magnet trick on every boot

 

[dpad_5678]

It's kinda more of a impractical truth, with this you could boot directly to Emunand even if the nand was ruined, but it would be kinda impractical as it would mean always having the ntrboot cart inserted and doing the magnet trick on every boot

Still better than having a bricked system . You could always leave it in sleep mode when not in use.

 

[Luglige]

I don't have a second system :/
Time to wait for someone to mass produce these puppies.

 

[Snooli]

I don't have a second system :/
Time to wait for someone to mass produce these puppies.

Don't know where you live, but there's a high chance there's someone nearby from GBAtemp willing to install it for you.

 

[aarti]

I don't have a second system :/
Time to wait for someone to mass produce these puppies.

You could buy a powersaves and wait till the method is released

 

[fmhugo]

Waiting R4 SDHC Dualcore support