April Fools joke

My DEC-related joke is not quite so amusing. Shortly before April 1st, the place I was working did a VMS upgrade. On the night before April 1st, I opened up some of the VT100 terminals (read : Most of the ones I could get to) and swapped over the horizontal deflection coil leads. I then asked the system managers what changes had been made to VMS, and why was everyyhting appearing backwards. Only one system manager knew what I'd done, even though I had a reputation for being a hardware person, and even though I'd left the VT100 printset open at the video monitor page on my bench (where one of the modified VT100s was). Another VT100 joke (not specifically April 1st) is the modified character generator. You wait until you find somebody doing a video monitor repair on a VT100, and then you swap the character generator ROM for one either with the characters flipped left-for-right or top-for-bottom. You can bet they'll spend hours trying all combinations of polarity for the 2 deflection coils, turn the yoke over, and so on trying to get it right :-). -tony