For information on the correct Q-bus device ordering, see the Technical Manual for MicroVAX II 630QB, that's the best one I have seen. Sorry, I don't have the book or even its part # in front of me (it's at work and I'm at home). Sincerely, Michael Sokolov Phone: 440-449-0299 ARPA Internet SMTP mail: mxs46@po.cwru.edu