Wayne Dunkel wrote: > I have a variable declared as a short. which function should I use to output it > to hardware? I assume one of the following: outsb, outsw, outsl, but I don't know which. > It depends on your hardware. b = byte, w= word, l = word. Try man outb. or info outb. It does not have any meening writing a word to hardware that only takes bytes. Anders Gnistrup