RT-11 runs pretty nicely on a Pro. It's no longer officially supported, but if you buy a RT-11 5.7 RX50 distribution from Mentec you will get a floppy that boots on a Pro, and it is fully Y2K compliant. If you'd rather have "straight block-by-block" RX50 images, look at ftp://sunsite.unc.edu/pub/academic/computer-science/history/pdp-11/pro/ These are a bit easier to use (with PUTR) than the teledisk images. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927