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.​

 

[Daglo99]

Can i use any card?

i. imgur. com / OTHpgsp.jpg

Sorry but does not let me paste the link

 

[Technicmaster0]

Can i use any card?

i. imgur. com / OTHpgsp.jpg

Sorry but does not let me paste the link

No

 

[NatsumiX]

Got this Card, for pretty cheap a long time ago (except mine is the 2016 version) :

Does this one work?

 

[Technicmaster0]

Got this Card, for pretty cheap a long time ago (except mine is the 2016 version) :

Does this one work?

Pretty sure not.

 

[Captain Library]

I still can't get over how incredible this is. We started with downgrading to 4.x using GW, installing the MSET exploit, and using that TERRIBLY unstable CFW known as Palantine/PBT.

Now we're installing permanent CFW on any console with just a DS flashcart that's been collecting dust. Absolutely incredible.

Just picked up a N2DS XL today as a Christmas gift for someone and had it set up with CFW in no time at all. Maybe half an hour or so including NAND backups and getting the main homebrew apps installed?

A far cry from the day or so I spent on my first A9LH install before the process had been refined by the amazing people on the 3DS scene. It was such a terrifying method at that time!

 

[tranfeer]

In fact, this list has helped so many people.

 

[zoogie]

Good news for r4isdhc.com.cn fans!
https://github.com/ntrteam/flashcart_core/issues/33#issuecomment-350352544

It worked for me. YMMV

 

[ThisIsDaAccount]

Good news for r4isdhc.com.cn fans!
https://github.com/ntrteam/flashcart_core/issues/33#issuecomment-350352544

It worked for me. YMMV

Great!

As a sidenote, I don't own one, but wouldn't that theoretically work with the Gateway Blue Cart?

 

[Sleet]

Good news for r4isdhc.com.cn fans!
https://github.com/ntrteam/flashcart_core/issues/33#issuecomment-350352544

It worked for me. YMMV

R4isdhc.com.cn is such an underrated cart, I've been shilling it for at least a year. People have always been quick to call it a timebomb cart but that is simply not the case. And wood is quite good on it.

http://www.nds-card.com/ProShow.asp?ProID=507

 

[TheCyberQuake]

R4isdhc.com.cn is such an underrated cart, I've been shilling it for at least a year. People have always been quick to call it a timebomb cart but that is simply not the case. And wood is quite good on it.

http://www.nds-card.com/ProShow.asp?ProID=507

I've used the card, two of them in fact. After a year they both started going bad. Sometimes it doesn't show up as a cart, sometimes it freezes mid game (it always does eventually, usually within 30 minutes). Cleaned the contacts, did the paper trick for better contact, formatted sd, brand new SD. I've had extended experience over years with multiple carts. These have been one of the worst carts I've used. I got a acekard 2i 2 years before the r4isdhc and its still working flawlessly. For long term use you'll want something better. Plus cheat codes were broken for me for almost every game, rarely could I get it to work.

 

[Jahhhhhh]

hi is the r4i-sdhc still buggy as of this moment? the 3dsguide has it listed but whenever I try to boot it using start + select + x + power button on sleep mode it just gives me a black screen :/ Im testing it on a b9s 2ds since I will be receiving a 3ds on version 1.xx something on the next day and the 3dsguide tells me that my only choices are either to hard mod or ntrboothax. Sadly I only have the r4i 3ds rts (http://prntscr.com/hllk4f). Any help regarding the black screen.? :/

 

[Quantumcat]

hi is the r4i-sdhc still buggy as of this moment? the 3dsguide has it listed but whenever I try to boot it using start + select + x + power button on sleep mode it just gives me a black screen :/ Im testing it on a b9s 2ds since I will be receiving a 3ds on version 1.xx something on the next day and the 3dsguide tells me that my only choices are either to hard mod or ntrboothax. Sadly I only have the r4i 3ds rts (http://prntscr.com/hllk4f). Any help regarding the black screen.? :/

Does the console turn off or go into sleep mode? If it turns off you are missing boot.firm from the 3DS SD card and if it goes into sleep mode either the card is not flashed properly or you're holding the buttons wrong. If the latter, try the following:

1. Turn off the console, insert the cart and turn on the sleep switch
2. Hold Select Start and X
3. Keep holding the aforementioned buttons then press power
4. Let go of power but keep holding Start Select and X
5. Keep holding for a few seconds
6. Release

It should work now (if the card is properly flashed).

 

[Jahhhhhh]

Does the console turn off or go into sleep mode? If it turns off you are missing boot.firm from the 3DS SD card and if it goes into sleep mode either the card is not flashed properly or you're holding the buttons wrong. If the latter, try the following:

1. Turn off the console, insert the cart and turn on the sleep switch
2. Hold Select Start and X
3. Keep holding the aforementioned buttons then press power
4. Let go of power but keep holding Start Select and X
5. Keep holding for a few seconds
6. Release

It should work now (if the card is properly flashed).

It just goes to sleep , the first black screen has a backlight and the backlight goes out a few second later, but the blue power button is up. I've used the multisystem method, should I try other methods?


edit: ok it's working now! I booted up on safeb9sinstaller! that means my ntrboothax flashcart is a success right? I copied a fresh kernel file for the r4 then recopied everything from the 3dsguide to my source 3ds

 

[MythosXe]

hey guys.
does anyone know if this card is supported?
thanks :>

 

[BobSpaghet]

Hey sorry if this is a dumb question but how does one restore a flashcart from a backup? I found a backup for my bricked cart but have no idea what to do

 

[Endrit49]

I get a black screen after pressing start on the luma3ds boot.firm
3ds is stuck on a black screen every time i power it on. It works again after I delete the config file from the luma folder but it happens again after step 8

Section 4, step 8
https://3ds.guide/installing-boot9strap-(ntrboot)

 

[THYPLEX]

Now i can use the DSTWO?
(not the one that can load 3ds roms , the old One).

 

[Technicmaster0]

Now i can use the DSTWO?
(not the one that can load 3ds roms , the old One).

Is it on the list http://gbatemp.net/threads/the-ultimate-list-of-ntrboot-compatible-flashcards.492234/ ? No

 

[THYPLEX]

Is it on the list http://gbatemp.net/threads/the-ultimate-list-of-ntrboot-compatible-flashcards.492234/ ? No

:'(

 

[kyledacat]

Hey, can anyone make a guide to recover from a fried nand because that is my issue with my origional 3ds