Hi, I've got a couple buried somewhere here (an XT and at least one XT-286). The "disadvantage" to me is that I simply don't want to keep an old DOS machine like that going purely to burn the odd EPROM/PAL. Plus, I want to be able to burn EPROMs directly from this machine, the one I do my development work (such that it is at the moment) on, not mess about transferring the files to another machine....hency the reason I really should overhaul my "S3". But I do take your point. :-) TTFN - Pete.