The "165262 @" prompting is from ODT. ODT is a very simplistic monitor that lets you modify memory and registers and start or single-step through instructions in memory. 165000 is a common (but not the most common) address to put a ROM'ed bootstrap at. I'm guessing that when you halted it it was either doing the self-test or waiting for an external device to come ready. The "&" prompt I'm not so sure about. It's possible that this is a prompt maybe it's from the OS/embedded application. What would help the most of all is an inventory of cards in the backplane. If they're DEC cards they'll have a "Mxxxx" number on the handle. Third party cards you'll probably have to pull to identify. Also tell us the exact position of each card in the backplane, and what cards are cabled to what drives. I suspect from the less-than-perfectly-standard bootstrap address of 165000 that you've got a third-party controller in there with on-board bootstrap, though of course there an infinite number of permutations that things could have been set up for! -- 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