I discovered this VIC-20 Kantronics ham radio interface among a bin of random stuff. Given that I’m not into ham radio I don’t know how this would have been used. What would have interfaced with the VIC-20 to use this cartridge? What were you able to do with this cartridge?If anyone is interested, I dumped the EPROM and made it available:
This eprom allows to connect the Vic-20 to a modem via the userport…. rtty and ascii rtx allowed.