Can anybody tell me what an Extender Board is ?
 It has part number 5012447D (with behind it also the text W9042).
 It also comes with two 70-11411-1D cables but I dont know if they belong
 with this. 
I believe it's an extender board used with a PDP-11/34 FP11-A
Floating Point unit, but I don't really know anything else about it or if
it can be used for other purposes.
Ashley