A friend in the retro community offered these up for some fun during the Christmas break.. Rest of parts ordered!
Colecovision Reprogrammable Card https://github.com/aotta/PiCOLECO
Atari 8 bit Pico Cart https://github.com/robinhedwards/A8PicoCart
Atari 8 bit Super Salt Diag cart https://www.pcbway.com/project/shareproject/_DIY__SUPER_SALT_DIAGNOSTIC_CARTRIDGE_PCB_FOR_ATARI_8_BIT_FAMILY.html
