I have a hex-height (Omnibus) board in my junk box... M8549 "Universal
Substitute Board". It has a few 10101 (ECL??) IC's. Here is a picture
of both sides.
http://s1181.photobucket.com/user/DrCharlesMorris/library/PDP-8
Anyone know what this is for, and any schematic info? I can't find it
on any module list.
thanks
Charles