ColecoVision and ADAM 8 BIOS Selector

Replaces the factory BIOS chip and holds all eight known BIOS images in a single adapter. What sets it apart from earlier BIOS mods is that it needs no case-mounted switch and no jumpers on the PCB: the image is chosen by pressing a momentary button hidden behind the cartridge slot cover, so the console needs no external modification and does not have to be opened again to change BIOS. Sold with a console-type option - a ColecoVision or an ADAM Selector PCB - and supplied as a populated 8 BIOS Adapter PCB, the console-specific Selector PCB and a BIOS PROM chip, with an optional 24-pin DIP socket. Ruggers Customs is Lundy's preferred installer and offered fitting free with its 2026 ColecoVision full-service packages.