I still have a Pitfall! cartridge for this system somewhere.
I am rather surprised that a way to plug a cartridge into a widget to load a game into an emulator is not more common.
I have a stack of consoles here in the garage… just no controllers or power supplies for them.
They are easy to modify with dual BIOS versions (regular and no-delay BIOSes) and 5v only DRAM chips.