rsfgen-py3

rsfgen-py3 is a Python 3-compatible version of rsfgen by ihaveamac, used to generate .rsf files for building or modifying 3DS titles with different configurations

This tool helps extract metadata from a 3DS ROM and a decrypted exheader.bin, and writes it into a template RSF file to be used with tools like makerom

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Features

• Compatible with Python 3.x
• Automatically extracts:
  • Title ID, Product Code, Company Code
  • Stack size, dependencies, access control info
  • Extended Save Data info
• Optionally applies:
  • Region-free patch (to icon.bin)
  • Firmware spoofing (to RSF template)

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Arguments

Short	Long	Description
-r	--rom	Path to a .3ds or .cci rom
-e	--exheader	Path to a decrypted exheader.bin file
-o	--rsf	Path to the RSF template to be used
-f	--regionfree	(Optional) Path to an icon.bin to apply region-free patch
-s	--spoof	(Optional) Apply firmware spoofing

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Usage

To use this tool, you'll need a decrypted exheader.bin file. You can extract it from your .3ds or .cci ROM using ctrtool.

Open a terminal in the folder where your ROM is located and run this command:

ctrtool --exheader=exheader.bin YourRomName.cci

Make sure ctrtool is in your system path or in the same directory as your ROM

Basic Command

(If using the .py, otherwise, if using the .exe just start the command with rsfgenpy3)

python3 rsfgenpy3.py -r YourRomName.cci -e exheader.bin -o YourRSFName.rsf

-r or --rom: Your ROM file
-e or --exheader: The exheader.bin file you extracted from the ROM
-o or --rsf: The RSF file to use and overwrite

Note

It is recommended to make a copy of the provided dummy.rsf file and use that copy as the output file. This way, your original template remains unchanged and you won't have to re-download it every time.

TODO

• Add thorough exception handling
• more stuff? idk i'll think of something

Credits

• ihaveamac for the original rsfgen tool
• Special thanks to my friend xToxicLynx for the initial conversion and guidance