On 09/18/2013 03:25 PM, Bob Armstrong wrote: Pontus wrote: Does it have the "flip chips" for connecting to another backplane (I don't know the number)? You mean the bus jumpers? No (those are hard to come by - sorry!). It doesn't even have a chassis or power supply - it's just the backplane. Yes, I found the number now. M935, visible in the middle here: http://www.vintagecomputer.net/digital/pdp8e/Digital_PDP8e-cardcage.JPG Anything OMNIBUS is getting hard do come by. I have the chassi and PSU, I need the backplane (and unfortunately the bus jumpers). I have a PDP-8/e that I'm trying to upgrade, but it only has one backplane so my options for more memory is few. /P