NTRBoot Released!

It's here!
ntrboot_checklist_2.png

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!

:arrow: Release
:arrow: Guide
:arrow: Free NTRBoot Flashing
:arrow: Free B9S Installations

Here is SciresM's post about this

Please see SciresM's presentation on bootromhax.
 
Last edited by Deleted member 381889,

zoogie

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Couldn't you just rename SafeB9SInstaller.firm to ntrboot.firm and place on SD root, or would that not work? :huh: I guess being able to chainload other firms would be nice, but you could maybe just have luma as boot.firm for after the installer finishes. Idk, it's been a while since I installed b9s.
Probably. One time I renamed safeB9Sinstaller to boot.firm and it didn't work for whatever reason.
 

NekoMichi

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I have a flash cartridge originally purchased in late 2011, the label has long since worn off but it used to look like this:
card10.jpg

(note that the text under the "Revolution for DS" is different to the image listed on the guide)
Is this still the same R4i 3DS Gold hardware? It runs Wood firmware and supports RTS.
 

jerbear64

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I have a flash cartridge originally purchased in late 2011, the label has long since worn off but it used to look like this:
View attachment 95496
(note that the text under the "Revolution for DS" is different to the image listed on the guide)
Is this still the same R4i 3DS Gold hardware? It runs Wood firmware and supports RTS.
That's the one.
 
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Creatable

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...your a fool... seriously...

Sent from my SM-G955F using Tapatalk
Calling me a fool isn't a very good argument. By the way, it's actually "you're a fool" next time you want to call someone something, please make sure you aren't what you're calling said person.
 

jerbear64

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Calling me a fool isn't a very good argument. By the way, it's actually "you're a fool" next time you want to call someone something, please make sure you aren't what you're calling said person.
The main argument I'm seeing from you is that this isn't any better than a DSiWare transfer. The thing is, it is.

Even if powersaves support isn't released (which it will be soon) there are still several advantages-
This method doesn't require purchasing a DSiWare title.
This method won't remove your NNID from the source console.
This method is much, *much* less time consuming since you don't need to wait for a transfer.
Once powersaves support is released, no second device is needed.
 

Creatable

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The main argument I'm seeing from you is that this isn't any better than a DSiWare transfer. The thing is, it is.

Even if powersaves support isn't released (which it will be soon) there are still several advantages-
This method doesn't require purchasing a DSiWare title.
This method won't remove your NNID from the source console.
This method is much, *much* less time consuming since you don't need to wait for a transfer.
Once powersaves support is released, no second device is needed.
I just don't think this is a good alternative.
 

Creatable

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Correct. It is a much BETTER alternative...
For now, I see it as pointless. It is still very similar to the DSiWare exploit right now as you purchase a flash cart for NTRBoothax, and you purchase a DSiWare title for the DSiWare method. It also acts similar, as in both methods you need a hacked 3DS, and yes, I would prefer NTR over DSiWare, but this just does not come across as useful for those who just started with Homebrew. I'll be waiting for the powersaves method now.
 

VashTS

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For those with b9s already installed, you could always flash a modified b9s firm to your ak2i. This one loads ntrboot.firm from SD instead of boot.firm, and it's what I have flashed to mine: https://gbatemp.net/threads/ntrboot-is-out.480586/page-10#post-7508890

It makes it a bit easier to determine if you're actually loading from the card first, and not just defaulting to the installed b9s in your firmware.

So this goes in the sd:/ntrboot/ folder and then just launch ntr flasher and flash the cart.

then put a file on the root named sd:/ntrboot.firm and as long as it works, it should boot whatever is named ntrboot.firm?

sounds legit, im about to try it
 

linuxares

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For now, I see it as pointless. It is still very similar to the DSiWare exploit right now as you purchase a flash cart for NTRBoothax, and you purchase a DSiWare title for the DSiWare method. It also acts similar, as in both methods you need a hacked 3DS, and yes, I would prefer NTR over DSiWare, but this just does not come across as useful for those who just started with Homebrew. I'll be waiting for the powersaves method now.
Why it's so useful compared to DSiWare is that it's unpatchable. They can never ever fix it. This is the main reason. It isn't a primary exploit of any kind, this have been known for as long as it's been news about it.
 

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Why it's so useful compared to DSiWare is that it's unpatchable. They can never ever fix it. This is the main reason. It isn't a primary exploit of any kind, this have been known for as long as it's been news about it.
I do get that, and I'm really excited about that, it's just that right now nobody will be using it to get into 3DS Homebrew. I'm hyped for the unbricks and unpatchable nature of this exploit though.
 

subcon959

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I do get that, and I'm really excited about that, it's just that right now nobody will be using it to get into 3DS Homebrew. I'm hyped for the unbricks and unpatchable nature of this exploit though.
You do realise there are already several large threads of people doing just that? I'm not sure why you think that just because it's not useful to you personally that it's somehow redundant for everyone. People have recovered from bricks after months of waiting, this is a huge development in the scene.
 
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