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.​

 

[trainboy2019]

Sorry if this is noobish, but should I get the R4i or the Acekard? I know both work, but is one more versatile than the other? Like working on a DS lite to play roms?

 

[SonicMC]

Hooray! Just got decrypt9 to boot on my OTP bricked 2ds! restoring original nand back! Used r4i gold card!

 

[Axorve]

So, my acekard2i is not clone, but don't work " cartdrige not supported". Any support rev AK2I coming ?

 

[Bateees]

If the developer(s) weren't trying to promote specific cards why are there two hyperlinks leading to specific online seller (3ds-card) on the 3dsguide website?

 

[trainboy2019]

If the developer(s) weren't trying to promote specific cards why are there two hyperlinks leading to specific online seller (3ds-card) on the 3dsguide website?

nds-card is a reputable seller, and GBATemp's sponsor.

 

[astronautlevel]

If the developer(s) weren't trying to promote specific cards why are there two hyperlinks leading to specific online seller (3ds-card) on the 3dsguide website?

The AK2i is the only card that has documented commands and public information, the other card is just an AK2i clone, and one of the developers of the AKAIO kernel was on the team, so it's obvious why these two were selected.

 

[Bateees]

nds-card is a reputable seller, and GBATemp's sponsor.

A few weeks ago I asked about why the development was taking so long because of my bricked 3ds and was told because of card compatibility. Now it looks like only a select few cards are going to be compatible and promoted through the gbatemp's website. I have no issue with gbatemp wanting support but don't appreciate being lied to.

 

[astronautlevel]

A few weeks ago I asked about why the development was taking so long because of my bricked 3ds and was told because of card compatibility. Now it looks like only a select few cards are going to be compatible and promoted through the gbatemp's website. I have no issue with gbatemp wanting support but don't appreciate being lied to.

Up until a few hours before release, the cards were bricked when flashed. That's what took so long.

Also, none of the developers are part of GBATemp's staff, and it's humiliating you'd imply that they're doing it to support specific cards to make a profit.

 

[Bateees]

Up until a few hours before release, the cards were bricked when flashed. That's what took so long.

Also, none of the developers are part of GBATemp's staff, and it's humiliating you'd imply that they're doing it to support specific cards to make a profit.

I apologize to the developers. I should not have assumed they were part of gbatemp's website. The only two major websites I know people use for modding their 3DS is gbatemp and 3dsguide.

 

[jerbear64]

the other card is just an AK2i clone

You're thinking of the R4i Ultra; the Gold is an R4 clone and has official Wood support.

 

[vastrolorde]

Is this gonna work on OLD 2DS?? If yes how can i do it?? any idea?

 

[jerbear64]

Is this gonna work on OLD 2DS?? If yes how can i do it?? any idea?

It works if you use the sleep switch.

 

[astronautlevel]

You're thinking of the R4i Ultra; the Gold is an R4 clone and has official Wood support.

According to Stary the R4i-Gold-3DS-RTS is a clone

[11:26 AM] Stary : As well as r4i gold 3ds rts
[11:26 AM] Stary : .....Which is an ak2i clone

 

[vastrolorde]

It works if you use the sleep switch.

so ill just have to put it on sleep mode? using the switch? cause im trying to do it. but nothing appears on screen using my tested ak2i on my New 3dsxl?

 

[Beerus]

Ayyyyyyyyyy lets goo!

 

[jerbear64]

According to Stary the R4i-Gold-3DS-RTS is a clone

[11:26 AM] Stary : As well as r4i gold 3ds rts
[11:26 AM] Stary : .....Which is an ak2i clone

http://r4ids.cn/ distributes Wood R4 rather than anything Acekard related. On the other hand there's a thread on GBATemp about converting an R4i Ultra in to a legitimate HW81 Acekard

 

[KeyMerVin]

so ill just have to put it on sleep mode? using the switch? cause im trying to do it. but nothing appears on screen using my tested ak2i on my New 3dsxl?

If I am not wrong, you need to put the switch to the right, like if you were to make the console sleep. That while the console is off

After that, you need to turn the console on by the button combination, keeping buttons pressed a while for the console to turn on

All that with the flashcard already inside the console

Cheers ^^

 

[Creatable]

When this is fully released. it will replace hardmods and the need of a second 3ds system

hahahahahahah wrong

 

[aos10]

question about this method,can i unbrick 3DS with this,then revert it back to OFW?
because after seeing the instruction,it seems it forces the user to install b9s and CFW on the bricked console.

 

[astronautlevel]

question about this method,can i unbrick 3DS with this,then revert it back to OFW?
because after seeing the instruction,it seems it forces the user to install b9s and CFW on the bricked console.

You can flash gm9 to the card and unbrick with it