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.​

 

[oji]

is there going to be more support in the future for more DSTT chips or is this it?

It's in progress, check this: https://github.com/kitling/flashcart_core/issues/56

 

[mustapha89]

I have 3dslink card(red ,blue) it's clone of R4i Gold 3DS Deluxe Edition
Witch one should I used for ntrboot (blue or the red)?
and is there tutorial for it ?

 

[gamesquest1]

I have 3dslink card(red ,blue) it's clone of R4i Gold 3DS Deluxe Edition
Witch one should I used for ntrboot (blue or the red)?
and is there tutorial for it ?

Pretty sure the 3dslink was just a rebranded 3ds gold deluxe , so the nds card (blue card) should just be a re-stickered r4 gold.cn card and you can follow the relevant steps on https://3ds.guide/ntrboot

 

[P4ndie]

Just dug my old R4i flashcart out of the ether known as my closet. It has a built in Wi-Fi chip but I don't know what purpose it served. Since it has the WIFI thing on it. I don't know of its on the same compatible list as the regular gray R4I Flashcart.

 

[RedBlueGreen]

Just dug my old R4i flashcart out of the ether known as my closet. It has a built in Wi-Fi chip but I don't know what purpose it served. Since it has the WIFI thing on it. I don't know of its on the same compatible list as the regular gray R4I Flashcart.View attachment 98589 View attachment 98590

This is one of the SDHC cards so I don't think it'll work until the dual core SDHC flasher is completed. You could test it though since the newest version of NTRBoot flasher refuses to use incompatible cards.

 

[P4ndie]

This is one of the SDHC cards so I don't think it'll work until the dual core SDHC flasher is completed. You could test it though since the newest version of NTRBoot flasher refuses to use incompatible cards.

Ok cool. I think I'm gonna wait for further development on this then. Thanks for letting me know.

 

[Shadicluigi]

I doubt this would work but could I somehow play NDS games using the magnet? (official cart, obvs)

 

[Quantumcat]

I doubt this would work but could I somehow play NDS games using the magnet? (official cart, obvs)

No, doesn't work (I tried it as soon as the idea was announced).

 

[Shadicluigi]

No, doesn't work (I tried it as soon as the idea was announced).

Ah, well that sucks. Guess I have nothing to do while I wait for my cart (R4I-SDHC.com) to be supported. :/

 

[SteelWolf89]

Is SuperCard DSTWO still being worked on? I haven't heard anything new besides people were trying to get in contact with the company that made it to figure out how to go about flashing and restoring it.

 

[Khim09]

What do you think on the new release of New 2DS XL? Do you think Nintendo patched or revised the hardware to block ntrboothax?

Sent from my SM-G950F using Tapatalk

 

[RedBlueGreen]

What do you think on the new release of New 2DS XL? Do you think Nintendo patched or revised the hardware to block ntrboothax?

Sent from my SM-G950F using Tapatalk

I doubt it. Those are probably just special editions to go with Ultra Sun and Ultra Moon.

 

[enes eyibil]

hi i have black r4i ultra card , i running system but the black screen gives me the error

what do i do ?

 

[sgkino]

Such an informative post.
So helpful.
Thanks again for the sharing.

 

[Shadicluigi]

Such an informative post.
So helpful.
Thanks again for the sharing.

I can't not read that in a sarcastic tone.

 

[Khim09]

I doubt it. Those are probably just special editions to go with Ultra Sun and Ultra Moon.

Good to hear, at least I can use my "Golden" ntrboot enabled flash cart to these special edition 2dses. Thank you.

Sent from my SM-G950F using Tapatalk

 

[tranfeer]

Very nice.

 

[zoogie]

Very nice.

It would be very nice if r4igold.cn cards started shipping pre-flashed with ntrboot while having still working nds mode.

 

[The Catboy]

This could easily become one of the most Capitalized exploits out there and I wouldn't be shocked to see online store reflashing their carts to get some extra money out of this.

Hi me from the past! Fancy seeing you here.

 

[EddyBrual12]

ntrboot on R4 SDHC DualCore ( ͡° ͜ʖ ͡°)