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{{lowercase title}}{{hatnote|This article is for general guidance on how to use ntrboot for various purposes. For instructions specifically on installing custom firmware, follow [[3dsguide:installing-boot9strap-(ntrboot)|our custom firmware installation guide's page.]]}} | {{lowercase title}}{{hatnote|This article is for general guidance on how to use ntrboot for various purposes. For instructions specifically on installing custom firmware, follow [[3dsguide:installing-boot9strap-(ntrboot)|our custom firmware installation guide's page.]]}} | ||
==Reinstalling the bootloader== | '''ntrboot''' allows <code>.firm</code> payloads to run entirely independent from the console's firmware, so it can be used to fix all known software issues. However, it can also cause the same issues if used incorrectly - be careful to get things right the first time, as the instructions may be harder to follow after a failed attempt. | ||
{{info|text=If you are a power user, you may wish to always use [[3DS:GodMode9|GodMode9]] as the default <code>boot.firm</code> loaded by your flashcart. You will always have its functionality available this way, and GodMode9 is capable of chainloading into other payloads as needed through the <code>FIRM Options...</code> menu of a <code>.firm</code> file.}} | |||
== Reinstalling the bootloader == | |||
{{warning|text=This section only installs boot9strap and is not a replacement for a full CFW install. If your system does not yet have custom firmware, follow the link at the top of the page.}} | {{warning|text=This section only installs boot9strap and is not a replacement for a full CFW install. If your system does not yet have custom firmware, follow the link at the top of the page.}} | ||
If you have installed a bootloader that cannot boot the system normally with CFW otherwise working, you can run GodMode9, SafeB9SInstaller, or OpenFirmInstaller via ntrboot to install a valid bootloader in its place. | If you have installed a bootloader that cannot boot the system normally with CFW otherwise working, you can run GodMode9, SafeB9SInstaller, or OpenFirmInstaller via ntrboot to install a valid bootloader in its place. | ||
The following instructions will have you run SafeB9SInstaller through GodMode9 to avoid an issue with the <code>Checking microSD card...</code> step of SafeB9SInstaller. | The following instructions will have you run SafeB9SInstaller through GodMode9 to avoid an issue with the <code>Checking microSD card...</code> step of SafeB9SInstaller. | ||
===What you need=== | ===What you need=== | ||
*The latest release of | *The latest release of {{GitHub|d0k3/SafeB9SInstaller/releases/latest|SafeB9SInstaller}} (the <code>.zip</code> file that isn't the source code) | ||
*The latest release of | *The latest release of {{GitHub|d0k3/GodMode9/releases/latest|GodMode9}} (the <code>.zip</code> file that isn't the source code) | ||
*The latest release of | *The latest release of {{GitHub|SciresM/boot9strap/releases/latest|boot9strap}} (the <code>boot9strap-#.#.zip</code> file - '''not''' ntr-devkit, ntr, or devkit) | ||
===Instructions=== | |||
====Section I - Prep Work==== | === Instructions === | ||
==== Section I - Prep Work ==== | |||
# Insert the '''flashcart's SD card''' into your computer | # Insert the '''flashcart's SD card''' into your computer | ||
# Copy <code>SafeB9SInstaller.firm</code> from the SafeB9SInstaller <code>.zip</code> to the root of your SD card | # Copy <code>SafeB9SInstaller.firm</code> from the SafeB9SInstaller <code>.zip</code> to the root of your SD card | ||
Line 22: | Line 28: | ||
# Reinsert the '''console's SD card''' into your console | # Reinsert the '''console's SD card''' into your console | ||
====Section II - ntrboot and installation==== | ==== Section II - ntrboot and installation ==== | ||
# Use your magnet to find the spot on your device that triggers sleep mode | # Use your magnet to find the spot on your device that triggers sleep mode | ||
# Power off your console and insert the flashcart | # Power off your console and insert the flashcart | ||
Line 31: | Line 38: | ||
# When prompted, input the key combo given on the top screen to install boot9strap | # When prompted, input the key combo given on the top screen to install boot9strap | ||
# When the install is complete, hold the power button to forcibly power off your console | # When the install is complete, hold the power button to forcibly power off your console | ||
# Depending on why you had to reinstall boot9strap, you may also want to follow [[3dsguide:finalizing-setup|Finalizing Setup]] from the CFW install guide at this point | |||
== Recovering from software bricks == | |||
If your console has been [[Brick|bricked]] ''not due to hardware damage'', then you can recover the system with ntrboot by loading GodMode9. From there, you can use needed tools depending on the specific issue - the most common three are listed as follows. | If your console has been [[Brick|bricked]] ''not due to hardware damage'', then you can recover the system with ntrboot by loading GodMode9. From there, you can use needed tools depending on the specific issue - the most common three are listed as follows. | ||
===Recovering from an unusable NAND=== | === Recovering from an unusable NAND === | ||
See [[3DS:GodMode9/Usage#Restoring_a_NAND_backup|how to restore a NAND backup]] for more specific instructions. If you do not have a NAND backup, you will instead need [[3DS:CTRTransfer|a CTRTransfer]], | |||
See [[3DS:GodMode9/Usage#Restoring_a_NAND_backup|how to restore a NAND backup]] for more specific instructions. If you do not have a NAND backup, you will instead need [[3dsguide:ctrtransfer|a CTRTransfer]], [[3DS:CTRTransfer/Manual|a manual CTRTransfer]], or help from [https://discord.gg/C29hYvh the Nintendo Homebrew Discord], depending on how severe your issue is. If you have a copy of <code>essentials.exefs</code> backed up, then even in the worst-case scenario you will only need a manual CTRTransfer. | |||
=== Recovering from corrupted FIRM partitions === | |||
[[#Reinstalling the bootloader|Reinstall boot9strap]], even if you see [[3DS:BootROM_8046_screen|a BootROM error when powering on your console.]] | |||
=== Issues with uninstalling custom firmware === | |||
If you have a NAND backup from when you first installed custom firmware, [[3DS:GodMode9/Usage#Restoring_a_NAND_backup|restore it.]] If you do not, then [[#Reinstalling the bootloader|reinstall boot9strap]] and then follow [[3dsguide:restoring-updating-cfw|Restoring / Updating CFW]] to make the system usable again. | |||
=== | == Installing CFW in edge cases == | ||
In cases where your system cannot normally install CFW, such as when important buttons other than {{B|START|SELECT|X|POWER}} are broken or the console has software issues that break parts of the system used in the exploits, ntrboot can still be used to install CFW. | |||
[[Category:Nintendo 3DS guides]] | |||
Revision as of 06:20, 25 February 2024
ntrboot allows .firm
payloads to run entirely independent from the console's firmware, so it can be used to fix all known software issues. However, it can also cause the same issues if used incorrectly - be careful to get things right the first time, as the instructions may be harder to follow after a failed attempt.
If you are a power user, you may wish to always use GodMode9 as the default boot.firm loaded by your flashcart. You will always have its functionality available this way, and GodMode9 is capable of chainloading into other payloads as needed through the FIRM Options... menu of a .firm file. |
Reinstalling the bootloader
This section only installs boot9strap and is not a replacement for a full CFW install. If your system does not yet have custom firmware, follow the link at the top of the page. |
If you have installed a bootloader that cannot boot the system normally with CFW otherwise working, you can run GodMode9, SafeB9SInstaller, or OpenFirmInstaller via ntrboot to install a valid bootloader in its place.
The following instructions will have you run SafeB9SInstaller through GodMode9 to avoid an issue with the Checking microSD card...
step of SafeB9SInstaller.
What you need
- The latest release of SafeB9SInstaller (the
.zip
file that isn't the source code) - The latest release of GodMode9 (the
.zip
file that isn't the source code) - The latest release of boot9strap (the
boot9strap-#.#.zip
file - not ntr-devkit, ntr, or devkit)
Instructions
Section I - Prep Work
- Insert the flashcart's SD card into your computer
- Copy
SafeB9SInstaller.firm
from the SafeB9SInstaller.zip
to the root of your SD card - Copy
GodMode9.firm
from the GodMode9.zip
to the root of your SD card and rename it toboot.firm
- Reinsert the flashcart's SD card into your flashcart
- Insert the console's SD card into your computer
- Create a folder named
boot9strap
on the root of your SD card - Copy
boot9strap.firm
andboot9strap.firm.sha
from the boot9strap.zip
to theboot9strap
folder on your SD card - Reinsert the console's SD card into your console
Section II - ntrboot and installation
- Use your magnet to find the spot on your device that triggers sleep mode
- Power off your console and insert the flashcart
- Set the magnet into place (or on an old 2DS, enable the sleep mode switch), then hold START, SELECT, and X and press POWER - continue to hold the other three buttons for around five seconds
- This may take a few tries to work since the positioning is awkward - if you boot into anything other than GodMode9, power off and try again
- Remove the magnet or disable the sleep mode switch - if the exploit was successful, you will have booted into GodMode9
- If asked, press B to deny setting RTC and/or doing an essential files backup, then navigate to
SafeB9SInstaller.firm
and press A, chooseFIRM Options...
and then chooseBoot FIRM
. - When prompted, input the key combo given on the top screen to install boot9strap
- When the install is complete, hold the power button to forcibly power off your console
- Depending on why you had to reinstall boot9strap, you may also want to follow Finalizing Setup from the CFW install guide at this point
Recovering from software bricks
If your console has been bricked not due to hardware damage, then you can recover the system with ntrboot by loading GodMode9. From there, you can use needed tools depending on the specific issue - the most common three are listed as follows.
Recovering from an unusable NAND
See how to restore a NAND backup for more specific instructions. If you do not have a NAND backup, you will instead need a CTRTransfer, a manual CTRTransfer, or help from the Nintendo Homebrew Discord, depending on how severe your issue is. If you have a copy of essentials.exefs
backed up, then even in the worst-case scenario you will only need a manual CTRTransfer.
Recovering from corrupted FIRM partitions
Reinstall boot9strap, even if you see a BootROM error when powering on your console.
Issues with uninstalling custom firmware
If you have a NAND backup from when you first installed custom firmware, restore it. If you do not, then reinstall boot9strap and then follow Restoring / Updating CFW to make the system usable again.
Installing CFW in edge cases
In cases where your system cannot normally install CFW, such as when important buttons other than START+SELECT+X+POWER are broken or the console has software issues that break parts of the system used in the exploits, ntrboot can still be used to install CFW.