Proto:Game Boy Advance BIOS

This page details one or more prototype versions of Game Boy Advance BIOS.

This prototype BIOS was found on a prototype Game Boy Advance unit which was used for demoing games. There don't seem to be any major under-the-hood differences, however.

Main Differences

• The intro jingle is different: the first part sounds more lower-pitched, while the second part resembles the jingle of the original Game Boy.
• Holding Start and Select at the same time does not hide the Nintendo logo.
• On the final BIOS, if no cartridge is inserted, the Nintendo logo will simply not be present. When using this BIOS, glitchy graphics will be displayed instead.

Japanese Debug (Proto)	Final