The XC handler was done at the same time (give or take) as XU and XQ. It is done with a prefix file (.INCLUDE) of the common source for X?. I will have to boot up my Pro to say for sure. It did ship in the V5.x timeframe with the Pro kit. I'm trying to remember if I have a copy of the XC source listing. If not I'd be interested in one. The reason is that I've long wanted to make an XC driver for DECnet/E. The main thing holding me back is the utter disgustingness of that Ethernet chip... paul