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Custom Install 3DS

From GameBrew - a wiki dedicated to Video Game Homebrew.

Custom Install
backup-your-3ds-sd-card-data-now.jpg
General
Author(s)ihaveamac
TypeUtilities
Versionaf2bb12
LicenceMixed
Links
Download
Website
Source
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custom-install

Experimental script to automate the process of a manual title install for Nintendo 3DS. Originally created late June 2019.

Summary

1. Dump boot9.bin and movable.sed from a 3DS system.

2. Install pycryptodomex:

  • Windows: `py -3 -m pip install --user --upgrade pycryptodomex`
  • macOS/Linux: `python3 -m pip install --user --upgrade pycryptodomex`

3. Download the repo ([zip link](https://github.com/ihaveamac/custom-install/archive/master.zip) or `git clone`)

4. Run `custom-install.py` with boot9.bin, movable.sed, path to the SD root, and CIA files to install (see Usage section).

5. Download and use [custom-install-finalize](https://github.com/ihaveamac/custom-install/releases) on the 3DS system to finish the install.

Setup

Linux users must build [wwylele/save3ds](https://github.com/wwylele/save3ds) and place `save3ds_fuse` in `bin/linux`.

movable.sed is required and can be provided with `-m` or `--movable`.

boot9 is needed:

  • `-b` or `--boot9` argument (if set)
  • `BOOT9_PATH` environment variable (if set)
  • `%APPDATA%\3ds\boot9.bin` (Windows-specific)
  • `~/Library/Application Support/3ds/boot9.bin` (macOS-specific)
  • `~/.3ds/boot9.bin`
  • `~/3ds/boot9.bin`

A [SeedDB](https://github.com/ihaveamac/3DS-rom-tools/wiki/SeedDB-list) is needed for newer games (2015+) that use seeds. SeedDB is checked in order of:

  • `SEEDDB_PATH` environment variable (if set)
  • `%APPDATA%\3ds\seeddb.bin` (Windows-specific)
  • `~/Library/Application Support/3ds/seeddb.bin` (macOS-specific)
  • `~/.3ds/seeddb.bin`
  • `~/3ds/seeddb.bin`

Usage

Use `-h` to view arguments.

Examples:

  • py -3 custom-install.py -b boot9.bin -m movable.sed --sd E:\ file.cia file2.cia
  • python3 custom-install.py -b boot9.bin -m movable.sed --sd /Volumes/GM9SD file.cia file2.cia
  • python3 custom-install.py -b boot9.bin -m movable.sed --sd /media/GM9SD file.cia file2.cia

License/Credits

`pyctr/` is from [ninfs `d994c78`](https://github.com/ihaveamac/ninfs/tree/d994c78acf5ff3840df1ef5a6aabdc12ca98e806/ninfs/pyctr).

[save3ds by wwylele](https://github.com/wwylele/save3ds) is used to interact with the Title Database (details in `bin/README`).

Thanks to @BpyH64 for [researching how to generate the cmacs](https://github.com/d0k3/GodMode9/issues/340#issuecomment-487916606).