I've seen a memory assembly from a PDP-15 and it looks very much like this. Also, if each connector pair corresponds to one bit it adds up to 18 which matches the word lenght of a PDP-15.
Of course, PDP-1, -4 and -7 used 18 bit word lenght, but they were not made with flip-chips. PDP-9 is made with flipchips and is 18 bit. But I seeem to recall it's memory looks quite different. /P On Tue, Dec 08, 2015 at 11:58:07AM +0100, Jörg Hoppe wrote: > I help cleaning out a large repository of DEC parts. > There a quantity of DEC core module assemblies appeared. > According to PDF docs these must be PDP-15 MM15's, but no labels are on the > boards. > > I show/offer some of them at > retrocmp.com/flipchipshop , > under "core memory" > > Can somebody confirm they are MM15's? > Are any PDP-15 running at all? > > Thanks, > Joerg
