2015-12-08 15:01 GMT+01:00 Jay Jaeger <cu...@charter.net>: > But not these - PDP-11's didn't use dual-height connectors on memory. > > Anyway, they are indeed PDP-15. (Whether or not they are actually MM15 > I don't know). The page on the memory on the provided link indicates: > > G100 > G613 > G614 > > The modules and options document on > bitsavers.org/dec/modules/modulesAndOptions sez.... > > G100 Sense Amp & Inhibity Driver, PDP15, 3 Wire, 3D Memory > Where Used: 15 > > G613 X Diode Matrix, 3 Wire, 4K, 9/I Where Used: 15 > G614 X Diode Matrix, 3 Wire, 4K, 9/I Where Used: 15 >
I also happen to have a few that need a new home - I have no PDP-15. Trade for something interesting... http://i.imgur.com/6xplRge.jpg > > JRJ > > On 12/8/2015 6:14 AM, Johnny Billquist wrote: > > Careful. Some PDP-11 memory is also 18 bits wide... 16 bits plus two > > parity bits. > > > > Johnny > > > > On 2015-12-08 13:03, Pontus Pihlgren wrote: > >> 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 > > > > >
