I use them on 11/73's with all switches off.
Dan
Subject: DEC M7551 question
I recently acquired a DEC M7551 (4Mb memory) board for
my 11/23+. I
installed the board, but the system traps while doing the power-on memory
test. Unfortunately, I don't have any documentation for the board and I'm
not sure if I have the jumpers/switches set correctly. It could be that the
board is just dead, but I'd like make sure before I give up. If someone
could forward me the settings, it would be greatly appreciated.
Thanks,
Bill King