You wrote... <snip> It's a MicroVAX II. MicroPDP's cannot boot or run VMS (that I know of) due to a different CPU. What's most likely happened is, somewhere along the line, somebody had a PDP-11/83 in that box, then pulled out the CPU and memory cards and replaced them with MicroVAX equivalents. You can easily do this, as the box, power supply, and backplane are compatible with either CPU. As an example: If I were to pull some spare 11/73 cards out of my stash, and replace the MV-II boards in my VAXStation II/GPX with them, said VAXStation would suddenly become an 11/73. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Sysop, The Dragon's Cave BBS (Fidonet 1:343/272) (Hamateur: WD6EOS) (E-mail: kyrrin2(a)wizards.net) http://www.wizards.net/technoid "Our science can only describe an object, event, or living thing in our own human terms. It cannot, in any way, define any of them..."