The main control board here is a delight. It's nicely labelled and shows that it supports several communication interfaces, including RS-232, RS-485 2-wire and 4-wire, IBIS and Ethernet. It also explains some DIP switch settings. There's also an EEPROMS labelled "Config" and four EEPROMs labelled "Fonts", even named F1 through F4. That's cute :3