YOU MUST ORDER WITH ENIG FINISH AT 0.8MM THICKNESS!

This is my design of a flashable MBC1-based cartridge for the Game Boy. The MBC1 mapper was used in many of the earlier Game Boy games, such as the Super Mario Land series, the Donkey Kong Land series, Metroid II, and one of my personal favorites - the original Link's Awakening.

This circuit board should cover most, if not all, MBC1 games. The features are as follows:

• Able to make games that use 4 Mbit of ROM and 256 Kbit of RAM, or 16 Mbit of ROM and 64 Kbit of RAM, depending on how you configure the jumpers
• Compatibility with all four of the major Game Boy battery management ICs - MM1026, MM1134, BA6129, and BA6735 (though you may have to add a few extra parts)
• The option to add battery backup to the cartridge without the need of the original battery management ICs - perfect for MBC1 donors that didn't have batteries in them
• Lower battery consumption compared to some of the original cartridges
• Fully compatible with the GBxCart RW so you can transfer games and save files to and from the board

Along with reading the GitHub repo IN FULL, please review the following before purchasing:

• To use this board, you need to have an original Game Boy game that uses an MBC1 mapper chip.
• You will need to remove the MBC1 from your donor cartridge for use on this board. This will require a hot air rework station or a hot plate. There's a list below of other parts you can re-use from the donor cartridge.
• When soldering parts on, it's a good idea to put kapton tape or otherwise cover the bottom cartridge edge. You do not want to get solder on the cartridge contacts.
• I am not responsible for any damage you do to your self or your property. I do not guarantee design compatibility. You may encounter issues with certain games! Attempt this project at your own risk.
• If you are using this board to make games other than for personal use, you must have permission from the originator to use and distribute any ROM images or other related material. You are responsible for making sure you adhere to any license requirements.
• DO NOT use my circuit boards for profiting from stolen work - this especially includes homebrew content, ROM hacks, and using fan-made labels without permission from the originator. Support original creators!

All gerbers and source files can be found in the GitHub repo, as this project is fully open source. Technical documentation of the board can be found in the Technical folder. Please view the repository for BOM information.

https://github.com/MouseBiteLabs/Game-Boy-MBC1-Cartridge