On Mar 21, 14:33, Aaron Christopher Finney wrote: I've stuffed a few other things on my web site at http://www.dunnington.u-net.com/public/ODT/ A few of the files are bootstraps taken from handbooks or manuals, but several of them are little bits of nonsense I wrote when I first encountered an 11/23, with no OS. Remember I was a beginner and try not to laugh out loud :-) If you think the syntax is a little non-standard, it's because I had to write my own cross-assembler and I hadn't used MACRO-11 much then. No, don't ask me for the source. It was so awful I threw it away :-) -- Pete Peter Turnbull Dept. of Computer Science University of York