---
title: "Installing boot9strap (MSET)"
---

{% include toc title="Table of Contents" %}

### Required Reading

This is a currently working implementation of the "FIRM partitions known-plaintext" exploit detailed [here](https://www.3dbrew.org/wiki/3DS_System_Flaws).

To extract the `.7z` files linked on this page, you will need a file archiver like [7-Zip](http://www.7-zip.org/) or [The Unarchiver](https://theunarchiver.com/).

### What You Need

* Any DS flashcart that works on your device version
* The latest release of [SafeB9SInstaller](https://github.com/d0k3/SafeB9SInstaller/releases/latest)
* The latest release of [boot9strap](https://github.com/SciresM/boot9strap/releases/latest) *(standard boot9strap; not the `devkit` file, not the `ntr` file)*
* The latest release of [Luma3DS](https://github.com/AuroraWright/Luma3DS/releases/latest) *(the `.7z` file)*
* The latest release of [the Homebrew Launcher](https://github.com/fincs/new-hbmenu/releases/latest)

### Instructions

#### Section I - Prep Work

1. Power off your device
1. パソコンにSDカードを入れます
1. Copy `boot.firm` from the Luma3DS `.7z` to the root of your SD card
1. Copy `boot.3dsx` to the root of your SD card
1. Create a folder named `boot9strap` on the root of your SD card
1. Copy `boot9strap.firm` and `boot9strap.firm.sha` from the boot9strap `.zip` to the `/boot9strap/` folder on your SD card
1. Copy `SafeB9SInstaller.dat` from the SafeB9SInstaller `.zip` to the root of your SD card

    ![]({{ "/images/screenshots/boot9strap-mset-file-layout.png" | absolute_url }})
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1. Reinsert your SD card into your device
1. Copy `SafeB9SInstaller.nds` from the SafeB9SInstaller `.zip` to your DS flashcart
1. Power on your device

#### Section II - Launching SafeB9SInstaller

1. Start your DS flashcart from your device
1. Boot `SafeB9SInstaller.nds` using your flashcart
1. Select the correct option for your system version
  + 4.X.X -> "4.x SafeB9SInstaller"
  + 6.X.X -> "6.x SafeB9SInstaller"
1. Reboot the system, then go to System Settings, then "Other Settings", then "Profile", then "Nintendo DS Profile"
1. If the exploit was successful, you will have booted into SafeB9SInstaller

#### Section III - Installing boot9strap

1. Wait for all safety checks to complete
1. When prompted, input the key combo given to install boot9strap
1. Once it has completed, press (A) to reboot your device

#### Section IV - Configuring Luma3DS

1. Your device should have rebooted into the Luma3DS configuration menu
  + If you get a black screen, [follow this troubleshooting guide](troubleshooting#black-screen-on-sysnand-boot-after-installing-boot9strap)
1. Use the (A) button and the D-Pad to turn on the following:
  + **「Show NAND or user string in System Settings」**
1. (Start) を押してセーブして再起動します
  + If you get an error, just continue the next page

___

### Continue to [Finalizing Setup](finalizing-setup)
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