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.​

 

[Urbanshadow]

Spoiler

HAHAHA! So stupid. Wellp.

 

[pokota]

Q: Can I unbrick from a ____ brick?
A: Considering the card has access to the bootrom, most likely yes! This can potentially unbrick any brick (except MCU), unless you've taken a knife to the motherboard.

Dang, so close. I really need to resolder my o3ds... I really need to learn how to solder.

 

[Jecoconono]

I just checked the website that had a 18$ discount and saw that the price rose from 18$ to 50$. I refreshed and it went back down to 16$. Whew, crisis averted. Please come in refund, I need to buy this before its too late
Edit: The site refreshes to say 50$. I already added it to my cart when it was 16$ so WHEW.
Edit: NEVERMIND! It was set to come with a 32gb cart. Its still 16$.

 

[sion_zaphod]

Try the button combo + sleep toggle at the same time, watch for the power LED and wait about 5 secs on the black screen, release the button combo and the exploit should boot. Took me about 5 mins to do a o2ds first time.

Thanks I have tried this several times and still no go. I cannot work out what i'm doing wrong.

 

[yardie]

is the new 2ds xl supported as well?

 

[Jecoconono]

Thanks I have tried this several times and still no go. I cannot work out what i'm doing wrong.

I am assuming you were running a bricked system. If so, your battery may have ran out and it won't even start. Either that or it has internal damage.

 

[Traiver]

is the new 2ds xl supported as well?

Yes it is.

 

[Columbo2811]

Thanks I have tried this several times and still no go. I cannot work out what i'm doing wrong.

Eject and Reinsert the ds card a few times. Might not be making a good contact.

 

[gamesquest1]

Can anyone please show the button combo and timing needed for doing this on o2ds. I have been trying this for hours. I've tried boot9strap installer and gm9 as boot.firm and neither seem to work. I would like confirmation and perhaps a video of someone doing this on o2ds because I've tried everything (holding x+start+select+power until the power light comes on then releasing all buttons or holding all buttons for anything up to 10 seconds before releasing)(I've tried switching the sleep switch off after releasing the combo buttons). Without actually seeing how this is done on a 2ds I cant tell if I'm doing something wrong.

 

[Urbanshadow]

-snip-

Just to clarify: when you push the button combo and the power, it doesn't power up inmediatly. You have to keep the combo and power button until power led lights up.
It can't be seen in the video because is blocked by the thumb.

 

[THYPLEX]

Aren't they the same just with higher clocks on plus?
http://rickeymandraque.github.io/linkers/dstwo.html

Sadly , i don't know

 

[sion_zaphod]

Thanks for the vid but I've just spent the past 10 mins trying this exactly and still no go. Because this 2ds was bricked by doing a safearm9loaderhax upgrade i cannot even power on the system without an sd card in the machine and arm9loaderhax.bin on the sd root. Does ntrboot initiate before the old arm9loaderhax? should I be able to boot this without arm9loaderhax.bin on the sd card even though the machine turns itself off straight away if the file is not there? Im about to see how far I can kick my 2ds down the street.

 

[gamesquest1]

Thanks for the vid but I've just spent the past 10 mins trying this exactly and still no go. Because this 2ds was bricked by doing a safearm9loaderhax upgrade i cannot even power on the system without an sd card in the machine and arm9loaderhax.bin on the sd root. Does ntrboot initiate before the old arm9loaderhax? should I be able to boot this without arm9loaderhax.bin on the sd card even though the machine turns itself off straight away if the file is not there? Im about to see how far I can kick my 2ds down the street.

Bootntr is first, so I'm assuming you have tried booting into a tool such as decrypt9 or godmode9 already via either a9lh or ntrboothax.....your sounds like a really weird case

 

[THYPLEX]

So It's comfirmed that the old DSTWO will never be compatible with ntrboothax ?

 

[gamesquest1]

So It's comfirmed that the old DSTWO will never be compatible with ntrboothax ?

That picture has nothing to do with ntrboothax,just wait for actual certified devs to comment, asking for opinions of random people doesn't really help

Personally if I had to guess the dstwo seemed like.the most obvious choice, but that said the dev team behind it probably put in extra security to keep their product unique, people might have more success approaching supercard devs themselves, although given their latest contributions (cloning gateway and copying open-source cfw I have a feeling the original talented devs have left them.already......but I guess those at the helm now do like copying other people's stuff so we might get a supercard boot super deluxe & knuckles release

 

[fenderjaguar]

So when we flash ntrboothax to the flashcard, it doesn't go on the sd card which you usually insert into the flashcard? Is the SD card which you usually put the NDS roms on supposed to be left out of the flash card, because it doesn't mention anything about it on the guide?

 

[gamesquest1]

So when we flash ntrboothax to the flashcard, it doesn't go on the sd card which you usually insert into the flashcard? Is the SD card which you usually put the NDS roms on supposed to be left out of the flash card, because it doesn't mention anything about it on the guide?

I don't think it makes any difference, I kept it in though

 

[Wuigi]

@fenderjaguar It doesn't touch the sd card.
Whether you have it inserted or not doesn't matter when using ntrboothax.
Edit: I use the microsd inside the cart for the 3DS I use ntrboothax on, pretty handy.

 

[GerbilSoft]

So when we flash ntrboothax to the flashcard, it doesn't go on the sd card which you usually insert into the flashcard? Is the SD card which you usually put the NDS roms on supposed to be left out of the flash card, because it doesn't mention anything about it on the guide?

The flashcard has its own internal flash memory used for the bootloader and the fake NTR header. That's what's being written to.

The SD card shouldn't be affected when installing ntrboothax onto the card, but it won't hurt to leave it out.

 

[fenderjaguar]

I think I understand it better now. Thanks for the quick replies