12 Nov
2014
12 Nov
'14
6:49 p.m.
Hello,
Here is some hi resolution pictures on front/back of a MM8-AB 16K core.
Fits perfectly in a PDP-8a that has the correct power supply (G8018).
http://www.abc80.net/docs/pdp8/pdp8a/DSC_2252.JPG
http://www.abc80.net/docs/pdp8/pdp8a/DSC_2253.JPG
The picture on ebay is really bad, but you can see that it is the same.
/Anders
Message: 5
Date: Wed, 12 Nov 2014 08:47:37 +0100
From: Mattis Lind <mattislind at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Subject: Re: Kearney & Trecker Core memory, may be PDP8
Message-ID:
<CABr82SLXMERy5JWVtoCvpC07EuLJydYLvcEuGEaTyU=QHB00Xw at mail.gmail.com>
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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-Chi…
.
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…
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