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.​

 

[SparrowPT]

A lot of the chinese manufacturers keep their kernel closed, and we can't tamper with it.
In order to make a DS flashcart compatible with with ntrboot, we need to be able to change the kernel. Only those two cards allow us to do such.

That's the case for most R4 clones- however, on the inside these two carts are very different.

The R4i SDHC 3DS RTS is a DSTT clone, whereas the R4i Gold 3DS RTS is an original R4 clone.

That's good to know, thank you for the information.
A few months ago I was trying to decide which R4 to buy between those 2 (Gold RTS and SDHC RTS) and ended up choosig the RTS one and I'm pretty happy with it, specially after installing YSmenu.
Just feels like it's a shame if the gold one gets supported and not this one.
Even tho I don't have a bricked 3DS at the moment and never had before, who knows if I might screw up in the future and end up needing to use this hack, unfortunately I'll have to get a different R4 card at that moment.
Still, I'm sounding ungratefull, which is not the case at all, thanks a lot for the amazing work on this, it's really awesome.

 

[Bateees]

Is the r4isdhc compatible?

 

[MrJason005]

I'm very certain that sooner or later, the Chinese manufacturers are going to sell B9S ready flashcarts, that are flashed already from the factory and are ready to be used, with just the chip and no SD card slot.
Should save a lot of people a lot of headaches.

 

[SkyDX]

i have a sneaking suspicion, if your still able to use as a cart too, the flash didn't take and youvshould try again.

first time i tried, still worked as a cart but didn't work with ntr... Second flash an error has occurred if i try to use as a cart andbfingers crossed with ntr...

Sent from my SM-G955F using Tapatalk

That could be yeah, I haven't done anything to my Acekards yet till the dust settles. I have two, one genuine one and a clone, I try to get the clone working as a normal Acekard first, if that works I'll use my genuine one for NTRBoot

 

[linuxares]

Yeah, Mines flashing now, its at 33% but seems really slow... hope its working...
I just sat there ejecting and reinserting the card trying to inject option until It started flashing (took at least 50+ tries)

Just hope I don't perma-brick my acekard2i (although doesn't really matter as I have gateway blue card for DS roms)
I have a 3DS-Xl on 11.2 stock firmware that I can test it on (yeah, I know there are other hacks but I want to try this one)

How did it go?

 

[annson24]

For anyone having trouble with HW81, use THIS build instead. It's from the discord group and it worked the first time I used it.

 

[Akira]

For anyone having trouble with HW81, use THIS build instead. It's from the discord group and it worked the first time I used it.

I second this! I have trouble using the flasher which is used in the guide(not booting anything) and this build fixed it.

 

[MrJason005]

https://gbatemp.net/threads/selling-pre-assembled-cards-for-ntrboot.480630/
Oh look what we have here

 

[coinblock]

Big thank you to the hard work of the NTRboot team! I was successfully able to unbrick an old 3DSXL I had lying around with my R4i 3DS Gold.

When trying to boot into safeb9sinstaller on a bricked 3DS you may run into a black screen, however just press the A button a couple of times and the installer should show up.

 

[annson24]

Big thank you to the hard work of the NTRboot team! I was successfully able to unbrick an old 3DSXL I had lying around with my R4i 3DS Gold.

When trying to boot into safeb9sinstaller on a bricked 3DS you may run into a black screen, however just press the A button a couple of times and the installer should show up.

Actually the menu won't show uo until you release yojr button combination and remove the magnet.

Sent from my SM-G950F using Tapatalk

 

[Akira]

Actually the menu won't show uo until you release yojr button combination and remove the magnet.

Sent from my SM-G950F using Tapatalk

It's different based in my experience. I have the magnet on even when installing b9s.

 

[MysticRiku]

Was unable to find answers elsewhere. My Acekard 2i loads up on my bricked new 3ds but safeboot9sinstaller gives me invalid firm error. I've triple checked that I have all the files where they should be from 3dsguide but I can't fix it. safeboot9sinstaller.firm was renamed to boot.firm on the root of my sd card, made a boot9strap folder and but the boot9strap.firm and .firm.sha in there but nothing.

 

[annson24]

Was unable to find answers elsewhere. My Acekard 2i loads up on my bricked new 3ds but safeboot9sinstaller gives me invalid firm error. I've triple checked that I have all the files where they should be from 3dsguide but I can't fix it. safeboot9sinstaller.firm was renamed to boot.firm on the root of my sd card, made a boot9strap folder and but the boot9strap.firm and .firm.sha in there but nothing.

From what archive did you extract the boot9strap.firm and the sha? The whole name if you may.

Sent from my SM-G950F using Tapatalk

 

[MysticRiku]

From what archive did you extract the boot9strap.firm and the sha? The whole name if you may.

Sent from my SM-G950F using Tapatalk

boot9strap-1.2.zip

 

[annson24]

boot9strap-1.2.zip

That really is strange. Have you tried using a different sdcard?

Sent from my SM-G950F using Tapatalk

 

[Master Dimentio]

So Im a tad confused how this will work... By which i mean ntrboot. Quite some time ago I bricked a new 3ds xl installing a9hl at the time. So if the system is revived where does it leave my 3ds in terms of being part way hacked. Just exactly how will having a flashcard with this on it work?

 

[ivoyko]

My 3DS was unbricked YAY! Now i have to do a CTR tranfer bc give me that error but at least bye bye sayonara arriveverchi adios... black screen!

 

[MrJason005]

So Im a tad confused how this will work... By which i mean ntrboot. Quite some time ago I bricked a new 3ds xl installing a9hl at the time. So if the system is revived where does it leave my 3ds in terms of being part way hacked. Just exactly how will having a flashcard with this on it work?

it will allow you to do a ctrtransfer to a clean console (since it allows you to use godmode9 on a bricked system and get those maced files), and then you can do the B9S method once you have 9.2 since 9.2 has the exploits

 

[Master Dimentio]

it will allow you to do a ctrtransfer to a clean console (since it allows you to use godmode9 on a bricked system and get those maced files), and then you can do the B9S method once you have 9.2 since 9.2 has the exploits

So whats this doing for me if i only have one new 3ds and its bricked and im looking to revive it?

 

[MrJason005]

So whats this doing for me if i only have one new 3ds and its bricked and im looking to revive it?

I just explained...
It will allow you to access godmode9, and therefore allow you to do a CTRTransfer, and therefore get your 3DS back to 9.2, and therefore you can install B9S once you are in 9.2