UFD DL0:[6,54] PIP DL0:[6,54]/CO=DU0:[6,54]*.* Right. And then you do BOO DL:[6,54]BRUSYS, which should be just fine. I just booted it up and tried it to get the real message. Here's what I'm doing - Hardware boot DL0. This boots the "real" RSX; when it gets to the MCR prompt, I say "BOO [6,54]BRUSYS". BRUSYS boots normally, and asks the "first device/second device" stuff. FWIW, I say "DL0" and "MS0". Hit enter and get the ">" prompt. At this point, I enter "TIM 09:45 7-may-85" and it says TIM -- 2 Not "error 2" (sorry, I misremembered that part); just "2" ... Typing BRU, BAD or INI all produce MCR -- 1 Curiously, entering just "TIM" with no argument actually works (although it produces a bogus date/time). I've never seen messages like this either; I'm hoping they mean something to somebody. Thanks, Bob