That's the first thing that popped out to me reading this too, bit then ended up on 'there's a perfectly good SPI bus on the link cable". With it hooked up the

That's the first thing that popped out to me reading this too, bit then ended up on 'there's a perfectly good SPI bus on the link cable". With it hooked up there, you can power the esp with its own battery, and switch out carts (or more likely roms on a flash cart) for the application you want to run. IRC and Gopher ROMs can just share a wifi module.