THIS JUST IN: Data General DG/500 system - I can't really find anything out about it on the Internet. It doesn't really look like a PC clone, it's very sturdily built, and has some sort of tape/cartridge drive in addition to a 5.25" floppy. Is there another name for it, is it just junk or what?
Also got an IBM 6580 Displaywriter T - no monitor or keyboard, just the base unit unfortunately. Has a lot of dirt on it, the case isn't on 100% straight, etc. Worth keeping around?
EDIT: Okay, it looks like the DG/500 was made in 1988 and runs on RDOS. Not sure how it connects to a monitor or TV...also, what's going on with the IBM PC/XT model numbering? I have two IBMs with the XT label on the front down on the floor (with a BUNCH of early '80s IBM clones, some real old ones!), but on the back, one of them says Model 5150 and the other says Model 5160.