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.​

 

[DKB]

lol gg those bricked 3ds's on ebay are up for the taking

 

[petethepug]

gg,

so, maybe this means on the Switch if I put an orange on top of the screen and hold X I would boot into the System Nand and be able to edit files?
Lol jk, but its neat someone found this unbrick method lol.

 

[austin5623]

If I'm not mistaken, godmode9 can delete everything on a Game Card, including DS ones. Could we use a throwaway ds cart and erase everything on it, then replace it with the firmware?

 

[Madridi]

@jockep , @BARNWEY , @EmuAGR , @Lia
Thanks for the info guys. That made much more sense.

This opens up much more possibilities though. For example, wouldn't this allow us to keep all units as stock, while the flashcart contain the cfw?

Not that people would care about this. But it's possible isn't it?

 

[Deleted member 381889]

@jockep , @BARNWEY , @EmuAGR , @Lia
Thanks for the info guys. That made much more sense.

This opens up much more possibilities though. For example, wouldn't this allow us to keep all units as stock, while the flashcart contain the cfw?

Not that people would care about this. But it's possible isn't it?

I'm pretty sure that's possible, considering the video showed the 3DS booting Luma3DS.

 

[EmuAGR]

This opens up much more possibilities though. For example, wouldn't this allow us to keep all units as stock, while the flashcart contain the cfw?

Boot9 > ntrboothax > Luma > EmuNAND

But that's not useful since you'll need the cart in the slot when the console boots (also the magnet and keypresses). At least it allows to play with NAND-fried consoles.

 

[vb_encryption_vb]

LOL, hardmods are dead....

Not really, prices of cards will skyrocket, and well I can easily sell a hardmod to repair a brick cheaper than the cost of a card

 

[Deleted User]

Does this mean that we have even more execution than B9S?

 

[vb_encryption_vb]

Does this mean that we have even more execution than B9S?

No, it's just needed for ppl that have bricks and don't want to send of for hardmod.

Also, used for installing b9 on any console. I see a hardware revision incoming or 3ds EOL. One of the 2.

 

[Shad0w136]

If I'm not mistaken, godmode9 can delete everything on a Game Card, including DS ones. Could we use a throwaway ds cart and erase everything on it, then replace it with the firmware?

This is what I was wondering myself :o

 

[Deleted member 381889]

I see a hardware revision incoming.

New 2DS XL
Then again, I feel it's unlikely they'll have fixed it in that.

 

[Madridi]

Boot9 > ntrboothax > Luma > EmuNAND

But that's not useful since you'll need the cart in the slot when the console boots (also the magnet and keypresses).

Sure, its probably inconvenient. But I'll go against popular opinion and say that it is useful to those not wanting to touch their sysnand. I'm already against popular opinion by choosing to use emunand on a cfw. That extra 2 seconds boot time (or less) doesn't bother me

 

[vb_encryption_vb]

New 2DS XL

Not what I'm speaking of. In theory, this will work on this revision as bootloader is the same.

This is what I was wondering myself :o

No

 

[Deleted member 381889]

Not what I'm speaking of. In theory, this will work on this revision as bootloader is the same.

Yeah, I realise haha

Then again, I feel it's unlikely they'll have fixed it in that.

 

[DKB]

My bottom screen on my 3DS is jacked up, and it's going to cost like 75 dollars to fix it. But my top screen has a bad dent in it as well, which would make it like a 175$ fix, aka, a whole new 3DS in general. I'm wondering if I should just take the risk of buying one with a "blue light" issue on it on eBay, but I'm not sure if all of those are the same type of error. Are they? I worry.

 

[vb_encryption_vb]

My bottom screen on my 3DS is jacked up, and it's going to cost like 75 dollars to fix it. But my top screen has a bad dent in it as well, which would make it like a 175$ fix, aka, a whole new 3DS in general. I'm wondering if I should just take the risk of buying one with a "blue light" issue on it on eBay, but I'm not sure if all of those are the same type of error. Are they? I worry.

I've looked into that as well, the cost isn't worth the risk in my opinion and how the hell you figure it will cost 75 to replace the bottom screen, lol?

 

[vb_encryption_vb]

My bottom screen on my 3DS is jacked up, and it's going to cost like 75 dollars to fix it. But my top screen has a bad dent in it as well, which would make it like a 175$ fix, aka, a whole new 3DS in general. I'm wondering if I should just take the risk of buying one with a "blue light" issue on it on eBay, but I'm not sure if all of those are the same type of error. Are they? I worry.

I've looked into that as well, the cost isn't worth the risk in my opinion and how the hell you figure it will cost 75 to replace the bottom screen, lol?

 

[DKB]

I've looked into that as well, the cost isn't worth the risk in my opinion and how the hell you figure it will cost 75 to replace the bottom screen, lol?

Haha, yeah, I know the price is insane. However, it's due to the price I saw in a repair shop nearby. They charge 75 dollars, or..that's what they claim on their website. And to do two repairs at, it's 175$.

 

[VaiCorinthians]

It would fixes all bricks type?

 

[DKB]

It would fixes all bricks type?

Considering they said "Even consoles with fried NAND, or even the NAND chip physically removed, can use this." Which is FAR beyond what most people have an issue with..

I would assume that generally bricked consoles would be fixed.

 

[vb_encryption_vb]

Haha, yeah, I know the price is insane. However, it's due to the price I saw in a repair shop nearby. They charge 75 dollars, or..that's what they claim on their website. And to do two repairs at, it's 175$.

Bottom screen is $20 and I charge $27 to install them. Top screen, I don't bother with them.