probably OT, but still cool: found an HP large format printer on the road

A few years ago I got a Calcomp 1043GT pen plotter from a guy who had paid $50 for it at a garage sale, then realized it wouldn't work with anything he had. He finally got tired of it sitting in his basement and offered it to me - I bought him a beer. :-) The most modern driver I ever found for it was for Windows 95. There is a ROM cartridge that one can plug in that will teach it to speak (ISTR) PCL, but I've never found one - anyone got one? So it talks a proprietary protocol that's quite obscure. I may try to reverse-engineer it one of these days if I'm ever really really bored.... But it draws really nice (and really big) pictures, even if I do have to drive it with a creaky old version of TurboCAD that runs on Win95. -- Ian