On Nov 6, 18:41, Lawrence LeMay wrote: multiplexor It's a DHV11. You need the "cabinet kit" which is essentially a (pair of?) panels with 4(?) DB25s on each, with a ribbon cable to connect them to the Berg connector on the card. No additional elecronics, just wires. That last is an RQDX3, MSCP controller. What version are the ROMs, out of interest? Yes. One of the switches sets the baud rate, default is 9600 8N1. Depending on which boot ROMs are on the card, you should see some sort of diagnostic display, and it may or may bot try to autoboot. If you tell us the ROM numbers (something like 23-238E5 or just 238E5) we can probably tell you which version it is. I have a copy of the MicroPDP-11 handbook somewhere, I can probably look it up. -- Pete Peter Turnbull Network Manager University of York