Foreword
This document, started in early 1995, is considered the single most comprehensive technical reference to Game Boy available to the public.
You are reading a new version of it, maintained in the Markdown format and enjoying renewedcommunity attention, correcting and updating it with recent findings. To learn more about the legacy and the mission of this initiative, checkHistory.
SCOPE
The information here is targeted at homebrew development.Emulator developers may be also interested in theGame Boy: Complete Technical Reference document.
Contributing
This project is open source, released under theCC0 license. Everyone is welcome to help, provide feedback and propose additions or improvements. The git repository is hosted atgithub.com/gbdev/pandocs, where you can learn more about how you cancontribute, find detailed contribution guidelines and procedures, file Issues and send Pull Requests.
There is aDiscord chat dedicated to the gbdev community.
Finally, you can also contact us and send patches via email:pandocs (at) gbdev.io.
Using this document
In the top navigation bar, you will find a series of icons.
By clicking on the icon you will toggle an interactive table of contents to navigate the document. You can also use→ and← keys on your keyboard to go to the following and previous page.
The lets you choose among 5 different themes and color schemes to please your reading experience.
You can search anywhere by pressings on your keyboard or clicking the icon.
The icon allows you to suggest an edit on the current page by directly opening the source file in the git repository.
This document version was produced from git commit41fa0d4 (2026-02-03 19:44:04 +0100).