IBM 3290 2 questions

I was recently climbing around in a dumpster, and pulled out two IBM 3290 plasma display terminals. Accordingt to what I can find online, they are a beefy sort of 3270 terminal that supports split screen and other stuff. Because I don't have any IBM equipment to hook it up to, and I really want to see something pretty on the display, is there any other way to get these to speak to anything except over the BNC which is on the bottom of the screen? I have not actually powered either one of them up yet- They rode back to my house in the back of an open-back pickup truck, so I took them apart and am letting them dry out before I even try. They are built typical IBM-tough, and I kind of like the looks of them. They appear toe be about 19" diagonal, and they each weigh close to 40 pounds. The back comes off with these simple little springy clamp things, and the electronics iniside are pretty cool looking. Can anybody point me to any technical info on these bad boys? They look really cool. Thank you, Greg Linder glinder(a)ews.uiuc.edu glinder(a)uiuc.edu