Kearney & Trecker Core memory, may be PDP8

[Mattis Lind]

This is another Ebay item which seems to be identical :
http://www.ebay.com/itm/DEC-H219B-16K-x-12-Core-Memory-Stack-Board-Flip-Chip-PDP-two-board-set-/151472858658?pt=BI_Control_Systems_PLCs&hash=item23447c6622
.

Also indicate PDP8/a system core mem, MM8-AB.

2014-11-12 8:41 GMT+01:00 Mattis Lind <mattislind at gmail.com>:

> Looking at page 3-17 of
> http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/pdp8/pdp8a/EK-8A001-OP-002_PDP-8A_Operators_Handbook_Sep76.pdf
> shows that it is as far as I can see identical to the 16 k MM8-AB.
>
> 2014-11-12 8:13 GMT+01:00 Paul Anderson <useddec at gmail.com>:
>
>> pic #4 shows a DEC core sticker on the back, but out of focus.
>>
>> On Wed, Nov 12, 2014 at 1:09 AM, jwsmobile <jws at jwsss.com> wrote:
>>
>> >
>> > On 11/11/2014 9:12 PM, Jon Elson wrote:
>> >
>> >> On 11/11/2014 09:18 PM, Johnny Billquist wrote:
>> >>
>> >>> On 2014-11-12 04:00, Jon Elson wrote:
>> >>>
>> >>>> On 11/11/2014 07:33 PM, jwsmobile wrote:
>> >>>>
>> >>>>> I can't tell for sure, but this auction may be for  PDP8 core board.
>> >>>>>
>> >>>>> KT-KEARNEY-TRECKER-ASSY-KT83-0933-KT84-020-SYSTEM-BOARD
>> >>>>>
>> >>>>> http://www.ebay.com/itm/181565552717
>> >>>>>
>> >>>>>
>> >>>>
>> >>> The fact that the board have four edge connectors and not six totally
>> >>> excludes PDP-11.
>> >>>
>> >> The first and last picture of the ebay listing above clearly has SIX
>> edge
>> >> connectors.
>> >> And, in fact, a number of PDP-11 peripheral boards had only 4
>> connectors.
>> >> CPU boards and memory did usually have 6.
>> >>
>> >> Jon
>> >>
>> >>
>> >>  I based my PDP8 on googling and looking for comments about the
>> processor
>> > type.  There was a history page which said they used PDP8s in their
>> > designs.  I know that the 6 up is more common for PDP11, but wanted to
>> > throw it out there.  I figured a core board of the right variety for
>> $195
>> > might be a steal since the seller didn't list it to be on the DEC
>> hardware
>> > searches on Ebay.
>> >
>> > Thanks for Al's comment on the 6800 board.  I see about half of all
>> photos
>> > being crap these days on ebay.  I was crossing fingers it would be a
>> design
>> > that started out as an actual dec, and maybe had a small board built up
>> > with a Harris pdp processor on it.  I know that is a really long shot,
>> but
>> > not impossible.
>> >
>> > thanks for the comments.
>> > Jim
>> >
>>
>
>