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.​

 

[Gamer4647]

I was actually lucky to be given an R4i card years ago from someone I knew, because otherwise I probably wouldn't have got one. Good job too, because I would be screwed right now.

 

[DaFixer]

Great news!
This looks really great!!!

 

[Mnecraft368]

I was actually lucky to be given an R4i card years ago from someone I knew, because otherwise I probably wouldn't have got one. Good job too, because I would be screwed right now.

Oh god i didnt know about that. Thanks for sharing. Lucky I have an R4i and the blue card from gateway 3ds

 

[Windylacine]

I wonder if it's possible to install B9S on stock systems with a flashcard even if one or all of flashcards are blacklisted on boot?

 

[Deleted member 381889]

I wonder if it's possible to install B9S on stock systems with a flashcard even if one or all of flashcards are blacklisted on boot?

There is no DS Flashcard whitelist. You can install B9S on stock 11.4 systems with this. Please read the FAQ.

 

[Deleted User]

I wonder if it's possible to install B9S on stock systems with a flashcard even if one or all of flashcards are blacklisted on boot?

The flashcards aren't blocked on boot.

 

[Gamer4647]

At least my R4i card that doesn't work beyond DSi will work here if I choose to hack a 3DS later on. After all, sales and imports of flashcards to the UK are now illegal.

 

[Windylacine]

The flashcards aren't blocked on boot.

There is no DS Flashcard whitelist. You can install B9S on stock 11.4 systems with this. Please read the FAQ.

That's great to know, I might uninstall A9LH on my oldest 3DS console that's cleared out of modifications entirely after system transfer and remains unbanned for online play, will decide to ''reinstall'' with B9S when 3DS lifespan/support finally ends.

 

[dpad_5678]

They lied. I tried with my bricked 2ds and it doesn't boot a regular DS game

I second this. Tried on a failed-hardmod-BSoD O3DS XL, Themehax O3DS, and B9S N3DS XL. Nothing happens.

 

[Gamer4647]

I second this. Tried on a failed-hardmod-BSoD O3DS XL, Themehax O3DS, and B9S N3DS XL. Nothing happens.

Pretty much everyone hates it when someone lies about stuff like that.

 

[dpad_5678]

Pretty much everyone hates it when someone lies about stuff like that.

It's such a stupid and pointless thing to lie about, that's why people believe them. Because WHY would anyone lie about that? Just WHY? Fuckers.

 

[Snooli]

Wait, so this could work on my EZflash V (not the Vi version)?

 

[Deleted member 381889]

Wait, so this could work on my EZflash V (not the Vi version)?

Please read the OP. No flashcards have been confirmed.

 

[Deleted User]

Wait, so this could work on my EZflash V (not the Vi version)?

we don't know

 

[Gamer4647]

Wait, so this could work on my EZflash V (not the Vi version)?

Please read the OP. No flashcards have been confirmed.

It's all a work in progress. As it stands, none of them support it yet because it hasn't been released.

 

[dpad_5678]

Wait, so this could work on my EZflash V (not the Vi version)?

Expect any common flashcarts to work, such as (unconfirmed, just speculation!!):

• Gateway 3DS Blue Card
• R4i Wood Gold
• R4 SDHC Dual Core
• Original R4
• Acekard 2i
• DSTWO / DSTWO+

 

[Deleted User]

Expect any common flashcarts to work, such as (unconfirmed, just speculation!!):

• Gateway 3DS Blue Card
• R4i Wood Gold
• R4 SDHC Dual Core
• Original R4
• Acekard 2i
• DSTWO / DSTWO+

Please don't spread false information. We have to be able to completely flash the flashcard, so some of these may not work

 

[Gamer4647]

Please don't spread false information. We have to be able to completely flash the flashcard, so some of these may not work

So it won't just work by replacing the files on the microSD card? Damn.

 

[Deleted User]

So it won't just work by replacing the files on the microSD card? Damn.

Nope. iirc most flashcards have the header data of another DS game to get it registered by the system.
It would work this way if the bootROM would load regular NTR games, but it requires a custom NTR cart.
Hence why only certain flashcards work

EDIT: Sky3ds uses buttons to send different Header data to the 3ds, which in turn acts as each game individually. If there were a DS flashcart like this, there would be no need for the flashing of the flash cart.

 

[Gamer4647]

Nope. iirc most flashcards have the header data of another DS game to get it registered by the system.
It would work this way if the bootROM would load regular NTR games, but it requires a custom NTR cart.
Hence why only certain flashcards work

EDIT: Sky3ds uses buttons to send different Header data to the 3ds, which in turn acts as each game individually. If there were a DS flashcart like this, there would be no need for the flashing of the flash cart.

How would we even flash it?