Custom Game Boy cartridge speeds up homebrew development

[Brittle Ronan]

Writing new Game Boy games just got quicker for one developer. Hackaday reports on a development cartridge by a maker called MrFrenchLame that loads new code through the Game Boy's link port instead of from an SD card

A bootloader loads code into RAM and runs it straight away without writing to flash memory. A button on the cartridge restarts the process

It has 32K of RAM, which is wiped when the power goes off, so it is meant for quick testing rather than permanent storage. Testing code quickly is exactly what it is for

The catch is that it needs a PC with a physical parallel port, which Hackaday calls a tall order in 2026. A USB version has been suggested but not built yet, and commenters point to other projects such as SpiderCart and the Pico based Crococart

Fast iteration makes a huge difference when developing games, and loading code over the link cable is a clever use of existing hardware. The parallel port requirement limits who can use it for now. A USB version would make it much more accessible

Have you ever tried making a Game Boy game? And what is your favourite homebrew game for a retro console?

Custom Game Boy Cart Speeds Up Developmenthackaday.com

[Batman]

Loading code through the link port is clever. No swapping SD cards back and forth. Test changes in seconds. Developers will love that speed. Speed is everything when iterating