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.​

 

[RedBlueGreen]

EDIT: Nevermind it should be in another thread

 

[laharl22]

I wait for dstwo support

 

[Axorve]

I have acekard 2i dsi compatible, witouth micro SD, and i have error message " supported cartdrige not detected " arf

 

[RedBlueGreen]

I have acekard 2i dsi compatible, witouth micro SD, and i have error message " supported cartdrige not detected " arf

Getting this as well with my R4 Gold 2016 RTS cardtridge as well.

Dumping flash
ChipID: 000007C2
HW Rev: FFFFFFFF
Supported cartridge not detected!

 

[zoogie]

Getting this as well with my R4 Gold 2016 RTS cardtridge as well.

Dumping flash
ChipID: 000007C2
HW Rev: FFFFFFFF
Supported cartridge not detected!

The url on the flashcart needs to read r4ids.cn

 

[RedBlueGreen]

The url on the flashcart needs to read r4ids.cn

Well shit. This one doesn't (it's from NDS-card). Maybe I'll have to wait for the R4 SDHC dual core compatibility to be released then?

 

[Quantumcat]

Found it here: https://www.wish.com/m/c/5841852f63ee2c4efff351e1

 

[DarthDub]

I need to get myself a flash cart so I can hack a New 2DS XL!

 

[Axorve]

I don't know, when my slot card is empty, ntboor say instant " supported card not detected".

When i put my acekard 2i, say me " supperted cart not detected " after 4/5sec, like other linker.

Wtf ?

ChipId: DA5A47FF
HW rev : DA5A47FF

 

[RustInPeace]

I take it R4i SDHC RTS Lite isn't supported, 2015 model for me specifically?

EDIT: never mind I got the answer.

 

[marcisz]

Is there any way to flash my flashcard without second console ? I think that this hax is just unusable if you havent second console..and if you have,why to wait for ntrboot when we have dsiware ? Is there any answer how to flash it without these two options ?

 

[Quantumcat]

Is there any way to flash my flashcard without second console ? I think that this hax is just unusable if you havent second console..and if you have,why to wait for ntrboot when we have dsiware ? Is there any answer how to flash it without these two options ?

If there was another option it would be in the guide.

 

[marcisz]

So its unusable To that moment when someone starts to sell flashed cards and it will be expensive as hell.. thanks for this hack but anyway i will throw my o3ds against the wall..

If there was another option it would be in the guide.

 

[annson24]

So its unusable To that moment when someone starts to sell flashed cards and it will be expensive as hell.. thanks for this hack but anyway i will throw my o3ds against the wall..

I don't know why you're talking trash. I've just used it 4 times already since it was released. The hack is juat not targeted to people like you.

Sent from my SM-G950F using Tapatalk

 

[jerbear64]

Is there any way to flash my flashcard without second console ? I think that this hax is just unusable if you havent second console..and if you have,why to wait for ntrboot when we have dsiware ? Is there any answer how to flash it without these two options ?

Because they're not done with the powersaves flasher yet, and this method doesn't require hassle with system transfer.

EDIT: Not to mention that both flashcarts supported are fantastic anyways, so you get a good flashcart out of this too.

 

[urherenow]

are any of you using nightlies? Or more to the point, has anyone who says it works used the latest official release? I'm only asking because nobody near me wants to let me try, but my ak2i flashed without a problem. I always build the latest of stuff before using it though, and boot9strap has 10 commits since last release. One of them mentions "fix ntrboot firm encryption" <-this sounds important

 

[Cava]

Thanks for your work.

 

[KuroGentei]

NTRbootboot was successfully installed on the ak2i. How do I boot the exploit on the Nintendo OLD2DS?
Sleep Switch on and hold combo Power on + Start + select + x do not produce any desired success.

 

[jerbear64]

NTRbootboot was successfully installed on the ak2i. How do I boot the exploit on the Nintendo OLD2DS?
Sleep Switch on and hold combo Power on + Start + select + x do not produce any desired success.

https://3ds.guide/installing-boot9strap-(ntrboot)

You still need the usual files on the target 3DS's SD card.

 

[Clydefrosch]

i feel like there should be some pictures and stuff added for the supported carts.
we all know theres a billion r4 type of flashcarts from various, similarily sounding websites with very different firmwares and such.

before there's a million 'is my r4 cart supported' or 'ive got an r4 cart, but something dont work!' type of threads