Gamers are more than likely familiar with the debug mode in game software. While it’s often not something intended for the end user, some games embrace it and others are cracked open to utilize it. The debug mode is typically used by developers to test features, look for bugs in the experience, or utilize a space where they can access all of the title’s components.
If you’re curious about trying out debugging for yourself, this Game Boy Debug Cart PCB gives you a foundation to make it happen. Simply solder a cartridge slot to the end and cut it to fit into the system.
This allows you to debug the game while it’s being played or simply look at how a reader/writer accesses the system. It’s a fun project to tackle, and one that offers a deeper look into how games are made.