11 Nov
2014
11 Nov
'14
8:33 p.m.
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
board is 6 across in size.
From what I could find out K&T used PDP8 for NC controlled machines at
some time.
There is also this sort of board. The silkscreen shows a Microprocessor
section outlined with a 40 pin ceramic gold chip.
I am going to query the vendor to get a picture where you can read what
is on the can, or get the text on the can. Maybe the thing is a Harris
part, don't know.
Since the listing is for Giddings and Lewis, which is either a
subsidiary or competitor of K&T it may be another completely different
system. It looks like K&T, G&L and Cincinnati Millacron had a number of
legal runnins as there were several lawsuits in the google hits when
looking these boards up.
CM used an OEM Microdata 1600, and later 3 generations of their own 1600
derived designs before moving on to other newer microprocessor scale
parts. The CM 800, and 900 and one later are all 1600s, or near
relatives os such. The 900 uses 8K, 16K microdata manufactured core
boards, and also the Ampex / CDC 32k core board. I buy all those that
show up cheap on the usual auction site.
Here is the processor board:
GIDDINGS-LEWIS-KT-KEARNEY-TRECKER-871-20410-05-SYSTEM-BOARD
http://www.ebay.com/itm/181564464339
Jim
11 Nov
11 Nov
9:11 p.m.
On 11/11/14 5:33 PM, jwsmobile wrote:
Here is the processor board:
GIDDINGS-LEWIS-KT-KEARNEY-TRECKER-871-20410-05-SYSTEM-BOARD
http://www.ebay.com/itm/181564464339
You can see the Moto batwing logo, probably a 6800
9:40 p.m.
Jim,
The microprocessor board looks like it came out of a Gemini D17 CNC
controller, circa mid 80's.
That was their own design electronics
If I remember correctly, the company was Cross-Trecker and then Kearny
& Trecker and then ultimately bought out by Giddings and Lewis.
G&L was running both the K&T electronics and their own 8000B control
concurrently on different products and finally switched over to Fanuc
controls
I believe that the K&T product line was ultimately discontinued.
G&L subsequently acquired FADAL machine tools, and ultimately closed
out that operation.
I also believe that G&L is now part of the MAG group, would have to
look that up to verify.
The first card with"flip chip" marked on it looks like a PDP8 or
possibly a PDP 11 card used in a Sundstrand control through the '70 to
early 80's.
It's been 30+ years since I worked on those antiques, brings back a
lot of memories.
The boards may very well be spares that were surplused out recently by
the company that I worked for since they (the company) closed several
facilities and were located within a mile or two where the boards are
located.
.
On 11/11/14, jwsmobile <jws at jwsss.com> 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
board is 6 across in size.
From what I could find out K&T used PDP8 for NC controlled machines at
some time.
There is also this sort of board. The silkscreen shows a Microprocessor
section outlined with a 40 pin ceramic gold chip.
I am going to query the vendor to get a picture where you can read what
is on the can, or get the text on the can. Maybe the thing is a Harris
part, don't know.
Since the listing is for Giddings and Lewis, which is either a
subsidiary or competitor of K&T it may be another completely different
system. It looks like K&T, G&L and Cincinnati Millacron had a number of
legal runnins as there were several lawsuits in the google hits when
looking these boards up.
CM used an OEM Microdata 1600, and later 3 generations of their own 1600
derived designs before moving on to other newer microprocessor scale
parts. The CM 800, and 900 and one later are all 1600s, or near
relatives os such. The 900 uses 8K, 16K microdata manufactured core
boards, and also the Ampex / CDC 32k core board. I buy all those that
show up cheap on the usual auction site.
Here is the processor board:
GIDDINGS-LEWIS-KT-KEARNEY-TRECKER-871-20410-05-SYSTEM-BOARD
http://www.ebay.com/itm/181564464339
Jim
10 p.m.
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
Boy, that SURE looks like PDP-11 memory, not PDP-8.
The cast metal stiffener I think came in at least very late
in the game
for the PDP-8. PDP-8s usually had the colored plastic pull
handles.
Jon
10:18 p.m.
On 2014-11-12 04:00, Jon Elson wrote:
On 11/11/2014 07:33 PM, jwsmobile wrote:
The fact that the board have four edge connectors and not six totally
excludes PDP-11. As for hex size with metal handles, that was used on
the 8/A. (Which indeed is late in the PDP-8 game, but then again, it
wasn't until the 8/A that you saw hex boards either, so if this would be
for a PDP-8, it would have to be an 8/A, since no other model fits the
hex boards.)
But this is not 8/A core memory either, since those actually have all
six connectors on the board, even if only a few signals were used on
connector 5, and no signals were used on 6.
But since this isn't even DEC stuff, it could still possibly have been
something for a PDP-8. PDP-11 is still out of the question because of
the four connectors.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
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
Boy, that SURE looks like PDP-11 memory, not PDP-8.
The cast metal stiffener I think came in at least very late in the game
for the PDP-8. PDP-8s usually had the colored plastic pull handles. 
11:01 p.m.
The first board is definitely a DEC core board. If it will help anyone I
can pull a MM8-A and MM11-D and compare them to the pic to see which.
I have hundreds of DEC compatible boards here including Warner Swaysea,
White/ Sunstrand, K/T, G/L, etc. if anyone of someone interested in them.
BTW, I have a few people sorting for me and they are making progress.
On Tue, Nov 11, 2014 at 9:18 PM, Johnny Billquist <bqt at update.uu.se> wrote:
On 2014-11-12 04:00, Jon Elson wrote:
On 11/11/2014 07:33 PM, jwsmobile wrote:
The fact that the board have four edge connectors and not six totally
excludes PDP-11. As for hex size with metal handles, that was used on the
8/A. (Which indeed is late in the PDP-8 game, but then again, it wasn't
until the 8/A that you saw hex boards either, so if this would be for a
PDP-8, it would have to be an 8/A, since no other model fits the hex
boards.)
But this is not 8/A core memory either, since those actually have all six
connectors on the board, even if only a few signals were used on connector
5, and no signals were used on 6.
But since this isn't even DEC stuff, it could still possibly have been
something for a PDP-8. PDP-11 is still out of the question because of the
four connectors.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
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
Boy, that SURE looks like PDP-11 memory, not PDP-8.
The cast metal stiffener I
think came in at least very late in the game
for the PDP-8. PDP-8s usually had the colored plastic pull handles.
12 Nov
12 Nov
12:12 a.m.
On 11/11/2014 09:18 PM, Johnny Billquist wrote:
On 2014-11-12 04:00, Jon Elson wrote:
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
On 11/11/2014 07:33 PM, jwsmobile wrote:
The fact that the board have four edge connectors and not
six totally excludes PDP-11. 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
2:09 a.m.
On 11/11/2014 9:12 PM, Jon Elson wrote:
On 11/11/2014 09:18 PM, Johnny Billquist wrote:
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
On 2014-11-12 04:00, Jon Elson wrote:
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
On 11/11/2014 07:33 PM, jwsmobile wrote:
The fact that the board have four edge connectors and not six totally
excludes PDP-11. 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
2:13 a.m.
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:
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
On 2014-11-12 04:00, Jon Elson wrote:
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 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.
2:41 a.m.
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
2:47 a.m.
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
6:16 a.m.
FWIW I'm pretty sure these boards are for a PDP-8/A chassis. See below...
On 12/11/2014 07:13, Paul Anderson wrote:
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.
Not necessarily, but it's extremely hard to imagine how it could
possibly be a Unibus board with four edge connectors on ABCD rather than
CDEF, and the only QBus chassis those boards would fit would be an H909
with a DDV11 backplane. So, I'd agree it's highly unlikely to be any
sort of -11.
I believe this system was based on a PDP-8/A because:
- the memory doesn't look /quite/ like my 11/34 core but does
look like 12-bit PDP-8/A memory;
- the seller has several other cards from what seem to be the
same system, or at least the same type, some of which have I/O
connectors just above where the EF fingers would be - as found
on some PDP-8/A boards, but not AFAIK on any others;
- the pattern of power/ground connections visible on the solder
side of some exactly match the Omnibus layout but not Unibus
or Qbus;
- a friend has a similar CNC system, built in a PDP-8/A
chassis, with a papertape reader exactly the same as the one
in one of the seller's other auctions.
There's a picture of it here, taken at DEC Legacy 2011:
http://wickensonline.co.uk/declegacy/node/129
It's a long time since I looked inside that system, so I can't be sure
how many of its boards were custom items, or if they match the listings.
Unfortunately I can't go and look for a week or two :-(
10:43 a.m.
On 2014-11-12 06:12, Jon Elson wrote:
On 11/11/2014 09:18 PM, Johnny Billquist wrote:
Doh. I was mixing up different images from different listings. Sorry.
On 2014-11-12 04:00, Jon Elson wrote:
The first and last picture of the ebay listing above clearly has
SIX
edge connectors. On 11/11/2014 07:33 PM, jwsmobile wrote:
The fact that the board have four edge connectors and not six totally
excludes PDP-11. 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
And, in fact, a number of PDP-11 peripheral boards had
only 4 connectors.
CPU boards and memory did usually have 6.
There were definitely quad height boards, but I don't think I ever saw a
PDP-11 board that was hex height with only four edge connectors. But I'm
sure you will point me to one now. :-)
Johnny
12:27 p.m.
On 11/12/2014 09:43 AM, Johnny Billquist wrote:
There were definitely quad height boards, but I don't
think I ever saw a PDP-11 board that was hex height with
only four edge connectors. But I'm sure you will point me
to one now. :-)
There definitely existed such boards. I don't remember if
these were made by
DEC or 3rd party. The idea was that the Unibus backplane
segments had
9 hex-wide slots. The two end slots had the Unibus in and
out jumpers/cables
plugged into them. if a board was hex wide at the handle
end, but cut
down to quad wide for a couple inches at the connector end,
it could
fit in those end slots, which were often left unused
otherwise. Later
DEC went to the full-height Unibus jumpers with about 5 feet
of cable in them
to clean up bus signals, and this scheme didn't work
anymore. But, it
did with the old short Unibus jumpers.
And, of course, the very OLDEST PDP-11 peripherals were
built up out of a
bunch of dual-wide boards. There were standard boards such
as address
recognizers and 16-bit registers, And so a parallel or
serial interface would
take up a whole Unibus backplane segment with half a dozen
boards
in it.
Jon
3:30 p.m.
On 11/12/2014 7:43 AM, Johnny Billquist wrote:
On 2014-11-12 06:12, Jon Elson wrote:
I never said the boards with 4 connectors which appear to be hex high
were anything to do with Dec, other than they were replacement boards of
some sort. I was sort of hoping they might be Harris 6100 boards and 12
bit, but as Al K pointed out the processor chip is probably Motorola
which rules that out.
If you zoom in you will notice that none of these boards seem to have
flipchip connector. I have not squinted to see if they might fit
without the keying feature on the board as well. Dec was very
protective of that and sued or hassled anyone who used that form factor
or edge card arrangement, and these guys may have kept the form factor
for card cage physical handling and used other connectors. I've not
seen much other than this one vendors boards.
I guess they didn't need the count of connections and dropped two
connectors for cost.
thanks
jim
On 11/11/2014 09:18 PM, Johnny Billquist wrote:
Doh. I was mixing up different images from different listings. Sorry.
On 2014-11-12 04:00, Jon Elson wrote:
The first and last picture of the ebay listing above clearly has
SIX
edge connectors. 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. And, in fact, a number of PDP-11 peripheral
boards had only 4
connectors.
CPU boards and memory did usually have 6.
There were definitely quad height boards, but I don't think I ever saw
a PDP-11 board that was hex height with only four edge connectors. But
I'm sure you will point me to one now. :-)
Johnny
15 Nov
15 Nov
3:12 p.m.
On 2014-11-12 12:30, jwsmobile wrote:
On 11/12/2014 7:43 AM, Johnny Billquist wrote:
Uh? They are definitely flip chip connectors. No need to even squint.
Just magnify the pictures.
On 2014-11-12 06:12, Jon Elson wrote:
I never said the boards with 4 connectors which appear to be hex high
were anything to do with Dec, other than they were replacement boards of
some sort. I was sort of hoping they might be Harris 6100 boards and 12
bit, but as Al K pointed out the processor chip is probably Motorola
which rules that out.
If you zoom in you will notice that none of these boards seem to have
flipchip connector. I have not squinted to see if they might fit
without the keying feature on the board as well. Dec was very
protective of that and sued or hassled anyone who used that form factor
or edge card arrangement, and these guys may have kept the form factor
for card cage physical handling and used other connectors. I've not
seen much other than this one vendors boards. On 11/11/2014 09:18 PM, Johnny Billquist wrote:
Doh. I was mixing up different images from different listings. Sorry.
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.
There were definitely quad height boards, but I don't think I ever saw
a PDP-11 board that was hex height with only four edge connectors. But
I'm sure you will point me to one now. :-)
Johnny
I guess they didn't need the count of connections
and dropped two
connectors for cost.
Well, it all depends on if there were anything to connect to on those
places, and if any needed signals were located there.
Johnny
12 Nov
12 Nov
1:30 a.m.
Actually, this particular board (item #181565552717) is from DEC and
it looks very similar (lettering etc) to the G652/H222 combo card
I still have. My set came from a PDP-11 I believe it was from an 11/34.
Ed
On 2014-11-12 04:00, Jon Elson wrote:
--
Dit is een HTML vrije email / This is an HTML free email.
Zeg NEE tegen de 'slimme' meter.
On 11/11/2014 07:33 PM, jwsmobile wrote:
The fact that the board have four edge connectors and not six totally
excludes PDP-11. As for hex size with metal handles, that was used on
the 8/A. (Which indeed is late in the PDP-8 game, but then again, it
wasn't until the 8/A that you saw hex boards either, so if this would be
for a PDP-8, it would have to be an 8/A, since no other model fits the
hex boards.)
But this is not 8/A core memory either, since those actually have all
six connectors on the board, even if only a few signals were used on
connector 5, and no signals were used on 6.
But since this isn't even DEC stuff, it could still possibly have been
something for a PDP-8. PDP-11 is still out of the question because of
the four connectors.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
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
Boy, that SURE looks like PDP-11 memory, not PDP-8.
The cast metal stiffener I think came in at least very late in the game
for the PDP-8. PDP-8s usually had the colored plastic pull handles.
1:38 a.m.
If it's 11/34 core, it should be a MM11-CP or DP
On Wed, Nov 12, 2014 at 12:30 AM, E. Groenenberg <quapla at xs4all.nl> wrote:
Actually, this particular board (item #181565552717) is from DEC and
it looks very similar (lettering etc) to the G652/H222 combo card
I still have. My set came from a PDP-11 I believe it was from an 11/34.
Ed
On 2014-11-12 04:00, Jon Elson wrote:
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Dit is een HTML vrije email / This is an HTML free email.
Zeg NEE tegen de 'slimme' meter.
On 11/11/2014 07:33 PM, jwsmobile wrote:
The fact that the board have four edge connectors and not six totally
excludes PDP-11. As for hex size with metal handles, that was used on
the 8/A. (Which indeed is late in the PDP-8 game, but then again, it
wasn't until the 8/A that you saw hex boards either, so if this would be
for a PDP-8, it would have to be an 8/A, since no other model fits the
hex boards.)
But this is not 8/A core memory either, since those actually have all
six connectors on the board, even if only a few signals were used on
connector 5, and no signals were used on 6.
But since this isn't even DEC stuff, it could still possibly have been
something for a PDP-8. PDP-11 is still out of the question because of
the four connectors.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
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
Boy, that SURE looks like PDP-11 memory, not PDP-8.
The cast metal stiffener I think came in at least very late in the game
for the PDP-8. PDP-8s usually had the colored plastic pull handles. 
6:57 a.m.
Am 12.11.2014 um 02:33 schrieb jwsmobile:
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
board is 6 across in size.
Can't understand this discussion. This is a pdp8/a core module. I don't
believe that there's any other 12 bit memory that looks exactly like the
8/a module - and actually is something different.
Count the components and you will see that it is a 12 bit thing...
Philipp
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aek＠bitsavers.org -
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jws＠jwsss.com -
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pete＠dunnington.plus.com -
quapla＠xs4all.nl -
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