Flashing ntrboot (3DS Single System)

Required Reading

Before proceeding, ensure you have read all of the information on ntrboot

This method requires nothing more than your stock unhacked 3DS and a compatible flashcart. This method uses the flashcart to run the ntrboot flasher .nds file on your 3DS. This means that your flashcart must support launching .nds files on your 3DS’s version. See the flashcart table on ntrboot for more information.

Note that in some rare circumstances, it may be possible for the flashing process to brick a counterfeit flashcart and render it permanently unusable. This is unlikely, but nevertheless only original listed flashcarts are supported. To reduce the chance of receiving a counterfeit card, it is recommended that you use a reputable site to buy your flashcart (such as NDS Card)

What You Need

Your ntrboot compatible flashcart

The latest release of boot9strap (ntr boot9strap; not the devkit file)

The latest release of ds_ntrboot_flasher

Instructions

Section I - Prep Work

Power off your device
Insert your flashcart’s SD card into your computer
Create a folder named ntrboot on the root of your flashcart’s SD card
Copy boot9strap_ntr.firm from the boot9strap ntr .zip to the /ntrboot/ folder on your flashcart’s SD card
Copy ntrboot_flasher_nds.nds to your flashcart’s SD card
Reinsert your flashcart’s SD card back into your flashcart
Insert your ntrboot compatible DS / DSi flashcart into your device

Section II - Flashing ntrboot

Launch ntrboot_flasher_nds.nds on your device using your flashcart
Press (A) to continue
Use (Up) and (Down) to select your flashcart
Press (A) to continue
Select “Dump flash” to make a backup of your flashcart’s memory
Input the key combo given to confirm
Press (A) to continue
Use (Up) and (Down) to select your flashcart
Press (A) to continue
Select “Inject FIRM” to install boot9strap to your flashcart
Input the key combo given to confirm
Press (A) to continue
Power off your device

Flashing ntrboot (3DS Single System)