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.​

 

[OrGoN3]

i think i saw in the pdf, that the card can do it as well. not sure if will work 100%.. i will check the godmode9. i think that's what on it i think

GodMode9 will be the easiest way, aside from PC, but that invovles transfering. GM9 you just highlight the .3ds file, and press A, then A again. https://3ds.guide/godmode9-usage#converting-a-3ds-to-cia

 

[tranfeer]

Just waiting for an updating.

 

[Chetti]

Quick question, need help with this one. Someone know if this flashcard is compatible with ntrboot?

 

[zoogie]

Quick question, need help with this one. Someone know if this flashcard is compatible with ntrboot?

Seems to work?
https://github.com/ntrteam/ds_ntrboot_flasher/issues/25

I'd pop the shell open and make sure the PCB matches what's in that thread though. Dual Cores can be mysterious and deceiving.

 

[Chetti]

Well I'm more confident now, thanks, i'll give it a try.

 

[Technicmaster0]

Well I'm more confident now, thanks, i'll give it a try.

I'm pretty sure that it won't work.

 

[RedBlueGreen]

One question, if your 3ds is modded what happens if you try ntrboot? I wan´t to try the flashcart to see if it works to help people over here.

You'll probably just boot into the Luma chainloader or configuration.

 

[adilucky3]

https://www.flickr.com/photos/apoor_lp2/38271434766/
New bie ask
I try ntrboot with my brick old 3ds XL. R4 sdhc dualcore 2017, succesfull injecting. Prepared file as 3ds guide, but 3ds not triggering. 3ds just blinking blue light about 1 second and then turning off again.
Start, select, and x butyon properly pushed.
Magnet is working, file is ok, confusing what is wrong. If someone know what is wrong, really appreciated. Thank you
Sorry problem cannot share image here

 

[zoogie]

New bie ask
I try ntrboot with my brick old 3ds XL. R4 sdhc dualcore 2017, succesfull injecting. Prepared file as 3ds guide, but 3ds not triggering. 3ds just blinking blue light about 1 second and then turning off again.
Start, select, and x butyon properly pushed.
Magnet is working, file is ok, confusing what is wrong. If someone know what is wrong, really appreciated. Thank you

Make sure boot.firm is on the root of your sd card.
get boot.firm here
https://github.com/AuroraWright/Luma3DS/releases/download/v8.1.1/Luma3DSv8.1.1.7z

 

[adilucky3]

Make sure boot.firm is on the root of your sd card.
get boot.firm here
https://github.com/AuroraWright/Luma3DS/releases/download/v8.1.1/Luma3DSv8.1.1.7z

Yes, exactly doit with 3ds guide..
Boot.firm is on the root, but 3ds is not turning on, just blinking
Thanks for fast response

 

[Eliot15]

Have you try different sd card?

 

[KhenemetHeru]

A friend is trying to do this with her R4i SDHC Dual Core 2015; She got it to the point in the guide where you press continue after selecting her card and RETAIL, and this screen is where the process hung up:

She's following the guide and using the dsi version as stated. Any constructive advice would be appreciated, as I don't have this myself to work on. Also, for firmware restoration, anyone got a clean backup for that card? I don't know if she does, unfortunately.

 

[MrJason005]

A friend is trying to do this with her R4i SDHC Dual Core 2015; She got it to the point in the guide where you press continue after selecting her card and RETAIL, and this screen is where the process hung up:
View attachment 105674
She's following the guide and using the dsi version as stated. Any constructive advice would be appreciated, as I don't have this myself to work on. Also, for firmware restoration, anyone got a clean backup for that card? I don't know if she does, unfortunately.

I don't get what seems to be the issue? All I got from your post is "the process hung up". What does that mean?

 

[KhenemetHeru]

I don't get what seems to be the issue? All I got from your post is "the process hung up". What does that mean?

Sorry, it means it sat with that on the screen for about 15 minutes with no feedback, and no exit prompt, nothing she can select. I'm having to assume that's not normal, which is why I asked.

She followed the guide, so launched "ds_ntrboot_flasher_dsi.nds", pressed A, Selected her card, pressed a, pressed a to inject, chose RETAIL, pressed a, and there you go.

If you need more information I can ask, but I need to know what you need to know, i guess.

 

[MrJason005]

it means it sat with that on the screen for about 15 minutes with no feedback, and no exit prompt, nothing she can select. I'm having to assume that's not normal, which is why I asked. She followed the guide, so launched "ds_ntrboot_flasher_dsi.nds", pressed A, Selected her card, pressed a, pressed a to inject, chose RETAIL, pressed a, and there you go. If you need more information I can ask, but I need to know what you need to know, i guess.

Is this a r4isdhc.com flashcart or a r4isdhc.com.cn/r4isdhc.hk flashcart?

 

[KhenemetHeru]

r4isdhc.com.cn

 

[MrJason005]

r4isdhc.com.cn

Those are unsupported by ntrboot. Perhaps a flasher will be available in 2-3 weeks. But as it is right now, they are unsupported.

 

[KhenemetHeru]

ok, I will let her know. that distinction wasn't entirely clear to us from the guide list or the github info, which is why I came here to ask. thanks for the help!

 

[adilucky3]

Yes, id

Have you try different sd card?

Yes, i do with 2 different sd card, oops 2 different microsd, with adapter.
So this problem just sd card? Not triggering ntrboot problem?

 

[ShadowOne333]

Can the flashcart which is used for NTRBoot and b9s installation be flashed back to be used as a normal DS cart for DS ROMs?