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.​

 

[infinete]

Need some help, can't figure out what I am doing wrong. I am trying to hack a latest firmware O3dsxl I have followed the guide to a T, flashed my ds flash cart with boot9strap 1.3 ntr, got the right files on my 3ds sd (2gb fat32), got a magnet which puts the console to sleep. Shut it down. Hold X+START+SEL+POWER for a few seconds, let go. But the console just boots up but in sleep mode. What am I doing wrong?

 

[Quantumcat]

Need some help, can't figure out what I am doing wrong. I am trying to hack a latest firmware O3dsxl I have followed the guide to a T, flashed my ds flash cart with boot9strap 1.3 ntr, got the right files on my 3ds sd (2gb fat32), got a magnet which puts the console to sleep. Shut it down. Hold X+START+SEL+POWER for a few seconds, let go. But the console just boots up but in sleep mode. What am I doing wrong?

Hold the Start, Select, X buttons for a few seconds. Power only has to be pressed briefly for the blue light to come on.

 

[infinete]

Hold the Start, Select, X buttons for a few seconds. Power only has to be pressed briefly for the blue light to come on.

Weird, but that seems to have solved, appreciated for the quick reply

 

[Zaphod77]

So what's the cheapest card that works?

If the flash is compatible, i beleive dstt is cheapest, but they are hard to find.

most oter options seem to be on the order of 20$ or more. I'm hoping a sub 10$ card that's widely available can be made to work.

 

[dawwwz]

If you want to move games to another console you have to do a system transfer. Just logging out and attempting to sign in to the other console won't work.

but if i system format???

 

[Quantumcat]

but if i system format???

Then you'll just be logging out locally, and can log back in on the same console, but you can't log in on another console.

 

[dawwwz]

Then you'll just be logging out locally, and can log back in on the same console, but you can't log in on another console.

ok thanks for the help appreciate it

 

[Skeagle]

Can this ubrick a bootrom error? (hard brick)

I just want to know in advance because I'm planning to buy r4i gold rts and do cfw on my 3ds 11.5.

 

[Redferne]

Can this ubrick a bootrom error? (hard brick)

I just want to know in advance because I'm planning to buy r4i gold rts and do cfw on my 3ds 11.5.

The answer is in the OP.
You will need a working 3DS to flash your R4i Gold RTS if you want to use it to CFW a console (follow 3ds.guide).

 

[Skeagle]

The answer is in the OP.
You will need a working 3DS to flash your R4i Gold RTS if you want to use it to CFW a console (follow 3ds.guide).

I do have a working 3ds, I was just asking in case I do brick it. Also is the flashcart reusable after the boot?

 

[Redferne]

I do have a working 3ds, I was just asking in case I do brick it. Also is the flashcart reusable after the boot?

Again the answer is in OP.

 

[FreePlayFlorida]

just got my card in the mail, its the R4ids.cn card as suggested and put on a R4 firmware (I found a R4 wood fw) on the sd micro card, and when go to put it in the 3DS, it shows as a Konami Digital Entertainment icon, whereas the other R4 i have that isnt compatible with ntrboot shows touch and go, anyway, hit A to load game and just goes to white screen, then blue top screen, not sure what im doing wrong? hopefully someone can help

 

[MrJason005]

just got my card in the mail, its the R4ids.cn card as suggested and put on a R4 firmware (I found a R4 wood fw) on the sd micro card, and when go to put it in the 3DS, it shows as a Konami Digital Entertainment icon, whereas the other R4 i have that isnt compatible with ntrboot shows touch and go, anyway, hit A to load game and just goes to white screen, then blue top screen, not sure what im doing wrong? hopefully someone can help

Is the SD card in the flashcart FAT32?

 

[Dracari]

whelp went to make my old AK2i setup incase i got another 3DS help a friends, or as an emergancy repair, it went fine, but... card only gets detected in D9 and teh flasher anything else, Zip nada. i went back to loading a patched twlbgso i could use apachethunder's stage3 launcher (ARDS works for me) to try and load the AK2i firmware flasher thinking "Ok, something went wrong lets make sure the card is atleast detected by its FW Update utility." and strangely "ChipID: 0000 HWID: 81" so something went wrong. i go Back to ntrboot_flasher and try restoring Dump. Flat out stops at 99% Reading. i try 4 times... so freaking abit out that my AK2i is now dead, i go Back to the FW Updater, and still says "ChipID 0000 HWID: 81" This cartridge cannot be updated" is it bricked-bricked?

Edit: ok i swappe dto my O3DS its weird still get "ChipID:0000" but im getting a much much much slower write speed than i should but its Slowly inching towards restoring flash.
it started at 10:30PM EDT at 11:15 i know it stopped i went to check now at 12:21AM EDT, and still 4% and not a single inch more on the progress bar.

 

[FreePlayFlorida]

yeah was fat32, emailed seller and got fw and now worked a treat, did my new 3ds, and 2ds, and all setup, just need to tweak and install some emu roms now and enjoy, was a long day and should have waited to post, oh well sometimes impatients, tiredness gets better of you

 

[royyy4]

will the normal r4i gold also work with ntrboot on 11.6? my friend bought the normal r4i gold in stead of the rts version and he want's to know if the normal R4i gold will work with ntrboot on 11.6

 

[Quantumcat]

will the normal r4i gold also work with ntrboot on 11.6? my friend bought the normal r4i gold in stead of the rts version and he want's to know if the normal R4i gold will work with ntrboot on 11.6

As long as it has r4ids.cn as the website

 

[Asia81]

Got my card 4 days ago, installed it on 4 3DS already, working just fine.
I won't reflash it back, will keep it as ready-to-install B9S as I have another R4i 3DS to play DS roms.

 

[FreePlayFlorida]

yeah flashed my 3ds, and 2ds, and going to keep the card as a ready to go installer, in case anyone local needs help with it etc, nice and easy and once got the files sorted, its a breeze

 

[Skeagle]

I feel extremely stupid for not asking first, but is 3ds-flashcard.com a good site? already ordered an r4i from there.