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.​

 

[PolskiWisnia]

Nah, I have SDHC DualCore 2015 one. I've given file under that post. I think my phone didn't sens it.

 

[The Catboy]

So i shouldn't fear? Thank God

The original R4 didn't have a method to rewrite the cart's firmware, so it can't be flashed to be an NTRBoot cart.
Some nds flashcarts like the DSTT it turns out actually have "unbricker" which were able to write the firmware of the cart. Which is actually what they used to turn the DSTT into an ntrboot compatible cart.
Basically any cart with a method of rewriting the firmware in theory can be turned into an NTRBoot cart. The only thing holding them back is knowledge of the encryption used by the official flashers/unbrickers.

 

[RedBlueGreen]

I heard that R4 is not reflashable. Is that true?

Since Dual Core R4 SDHC support is coming it has to be in some way flashable. DSTT can be flashed as well and people said the same thing about it (and apparently the SDHC cards are clones of DSTT).

 

[THYPLEX]

I can use this card for ntrboothax ?

 

[PolskiWisnia]

Since Dual Core R4 SDHC support is coming it has to be in some way flashable. DSTT can be flashed as well and people said the same thing about it (and apparently the SDHC cards are clones of DSTT).

Thanks for explaining

 

[fayt08]

will iEDGE be also supported? im just curious coz i also have 1 lying around here in my drawer..

 

[failzers]

So i successfully flashed my r4i gold 3ds rts and unbricked my system about a month ago. It seems though now, that ntrboot_flasher won't recognize it, or the 3ds homescreen. ntrboot_flasher after selecting R4 GOLD 3DS RTS says that Flashcard setup failed. Tried with all the different backup.bin's. nothing. A fucking paperweight.

Update: tried a different sd, reformatting of the flashcarts card, different ds, and it now works.

 

[Deleted member 381889]

I can use this card for ntrboothax ?

No

 

[WUING]

Can I use the Supercard-DSTWO for ntwboothax?
I have an old 3dsLL with 11.5 need to break T_T

 

[TheCyberQuake]

Can I use the Supercard-DSTWO for ntwboothax?
I have an old 3dsLL with 11.5 need to break T_T

Why does everyone ask "is x card supported?" if it's not listed in OP its not officially supported. So everyone needs to stop asking. Especially when that specific card has info in OP and had already been asked about hundreds of times.

 

[RustInPeace]

Why does everyone ask "is x card supported?" if it's not listed in OP its not officially supported. So everyone needs to stop asking. Especially when that specific card has info in OP and had already been asked about hundreds of times.

You know the time spent asking and waiting could've been used to buy a compatible flashcart. It's something that I've realized recently. It's what I did, and they're not really expensive to begin with (at least if you go for free or low cost shipping).

 

[WUING]

Why does everyone ask "is x card supported?" if it's not listed in OP its not officially supported. So everyone needs to stop asking. Especially when that specific card has info in OP and had already been asked about hundreds of times.

The reason is DSTWO have two types of flashcards, The list just said DSTWO is on planned card. But they didn't mention the DSTWO plus. I forgot to add "+" in my reply. And I think they maynot renew the list.

 

[Deleted member 381889]

And I think they maynot renew the list.

I check regularly for updates

 

[The Catboy]

I check regularly for updates

The only thing is, is that the official list doesn't include these
https://gbatemp.net/threads/release-ntrboot-for-r4igoldcc-ards-ez-ardsi.483802/

 

[Asia81]

I'm trying to flash my R4, but I get an error:

And this is the R4 I have:

I know this is not a "Gold" one or from ".cn", but it should work the same way, no?

 

[RedBlueGreen]

I'm trying to flash my R4, but I get an error:

And this is the R4 I have:

I know this is not a "Gold" one or from ".cn", but it should work the same way, no?

Nope. The cards from R4-SDHC are completely different than the official R4 cards.

 

[TheCyberQuake]

I'm trying to flash my R4, but I get an error:

And this is the R4 I have:

I know this is not a "Gold" one or from ".cn", but it should work the same way, no?

No. A lot of companies use the r4 moniker, all making completely different cards. What works for one r4 will not work for others.

 

[Asia81]

But they sell a B9S from SDHC, so...
It's really not possible?
I can buy a R4 if needed, but I would like avoid spend more money...

 

[TheCyberQuake]

Nope. The cards from R4-SDHC are completely different than the official R4 cards.

There is no "official" r4 except the original. Anything else is just using the r4 moniker

 

[Asia81]

If the OP can confirm my R4 is not compatible in any ways, I'm planning to buy this one, that is listed in the first post...