11 May
2013
11 May
'13
11:47 p.m.
Hi all --
I have a pair of core memory boards (which look to be 8kilobytes +
parity) in my Imlac, made by Dataram in the early 1970s (based on
datecodes in the machine, I'd say late 1973, early 1974). I can find no
documentation on them. They're labeled Imlac on the main PCB (P/N
01-12880-1), but Dataram on the core plane, and interestingly, this Blog
post on Dataram's site:
http://www.dataram.com/blog/?p=163
Has a very grainy picture of the assembly -- see the photo here:
http://www.dataram.com/blog/wp-content/uploads/2012/08/40yrs_7.png
So I believe the whole assembly (PCB + core plane) was actually made by
Dataram. I have some high-res scans up at:
https://plus.google.com/u/0/photos/117997069161125071032/albums/58762337385…
(See the last two images in the album.)
I'd love to find schematics for this, as it's the only part of the
system I do not have documentation for (and it's going to need some
repair, as it's got some fairly serious moisture damage -- some of the
ICs are weathered enough that they're unreadable). I'm going to shoot a
mail off to Dataram as well, but I figure my odds there are pretty low.
Thanks as always,
Josh
12 May
12 May
11:18 p.m.
New subject: [cctalk] Help identifying (and finding docs for) Dataram core memory board
On 05/12/2013 02:47 AM, Josh Dersch wrote:
I have a pair of core memory boards (which look to be
8kilobytes + parity) in
my Imlac, made by Dataram in the early 1970s (based on datecodes in the
machine, I'd say late 1973, early 1974). I can find no documentation on
them. They're labeled Imlac on the main PCB (P/N 01-12880-1), but Dataram on
the core plane, and interestingly, this Blog post on Dataram's site:
http://www.dataram.com/blog/?p=163
Has a very grainy picture of the assembly -- see the photo here:
http://www.dataram.com/blog/wp-content/uploads/2012/08/40yrs_7.png
So I believe the whole assembly (PCB + core plane) was actually made by
Dataram. I have some high-res scans up at:
https://plus.google.com/u/0/photos/117997069161125071032/albums/58762337385…
(See the last two images in the album.)
I'd love to find schematics for this, as it's the only part of the system I
do not have documentation for (and it's going to need some repair, as it's
got some fairly serious moisture damage -- some of the ICs are weathered
enough that they're unreadable).
The basic board outline kinda reminds me of DG.
I'm going to shoot a mail off to Dataram as
well, but I figure my odds there are pretty low.
Actually they're a pretty clueful company...I'd say it's worth a try. (I
grew up not far from them, and several older friends and mentors of mine
worked there...I have lots of Dataram stuff)
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
13 May
13 May
7:35 p.m.
New subject: [cctalk] Help identifying (and finding docs for) Dataram core memory board
On 5/12/2013 11:18 PM, Dave McGuire wrote:
Cool, I've sent a mail and we'll see. If you have any contacts who
might have info on this, let me know :).
Thanks,
Josh
On 05/12/2013 02:47 AM, Josh Dersch wrote:
I suppose it's possible, though this is from an Imlac -- I thought DG
boards are generally larger (though I don't have a lot of first-hand
experience). The board's about 14"x11".
I have a pair of core memory boards (which look
to be 8kilobytes + parity) in
my Imlac, made by Dataram in the early 1970s (based on datecodes in the
machine, I'd say late 1973, early 1974). I can find no documentation on
them. They're labeled Imlac on the main PCB (P/N 01-12880-1), but Dataram on
the core plane, and interestingly, this Blog post on Dataram's site:
http://www.dataram.com/blog/?p=163
Has a very grainy picture of the assembly -- see the photo here:
http://www.dataram.com/blog/wp-content/uploads/2012/08/40yrs_7.png
So I believe the whole assembly (PCB + core plane) was actually made by
Dataram. I have some high-res scans up at:
https://plus.google.com/u/0/photos/117997069161125071032/albums/58762337385…
(See the last two images in the album.)
I'd love to find schematics for this, as it's the only part of the system I
do not have documentation for (and it's going to need some repair, as it's
got some fairly serious moisture damage -- some of the ICs are weathered
enough that they're unreadable).
The basic board outline kinda reminds me
of DG. I'm going to shoot a mail off to Dataram as
well, but I figure my odds there are pretty low.
Actually they're a pretty
clueful company...I'd say it's worth a try. (I
grew up not far from them, and several older friends and mentors of mine
worked there...I have lots of Dataram stuff)
-Dave
7:48 p.m.
On 05/13/2013 10:35 PM, Josh Dersch wrote:
I suppose it's possible, though this is from an Imlac -- I thought DG boards
are generally larger (though I don't have a lot of first-hand experience).
The board's about 14"x11".
Yeah, it was just an observation. I know nothing of Imlac stuff.
(unfortunately)
Cool, I've sent a mail and we'll see. If you have any contacts who might
have info on this, let me know :).
Oh jeeze, nobody I've spoken to in well over twenty years.
I'll shake a few facebook contacts and see.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
I have a pair of core memory boards (which look to be
8kilobytes + parity) in
my Imlac, made by Dataram in the early 1970s (based on datecodes in the
machine, I'd say late 1973, early 1974). I can find no documentation on
them. They're labeled Imlac on the main PCB (P/N 01-12880-1), but Dataram on
the core plane, and interestingly, this Blog post on Dataram's site:
http://www.dataram.com/blog/?p=163
Has a very grainy picture of the assembly -- see the photo here:
http://www.dataram.com/blog/wp-content/uploads/2012/08/40yrs_7.png
So I believe the whole assembly (PCB + core plane) was actually made by
Dataram. I have some high-res scans up at:
https://plus.google.com/u/0/photos/117997069161125071032/albums/58762337385…
(See the last two images in the album.)
I'd love to find schematics for this, as it's the only part of the system I
do not have documentation for (and it's going to need some repair, as it's
got some fairly serious moisture damage -- some of the ICs are weathered
enough that they're unreadable).
The basic board outline kinda reminds me
of DG. I'm going to shoot a mail off to Dataram as
well, but I figure my odds there are pretty low.
Actually they're a pretty
clueful company...I'd say it's worth a try. (I
grew up not far from them, and several older friends and mentors of mine
worked there...I have lots of Dataram stuff)
25 May
25 May
8:39 p.m.
On 5/13/2013 7:48 PM, Dave McGuire wrote:
On 05/13/2013 10:35 PM, Josh Dersch wrote:
Cool, I've sent a mail and
we'll see. If you have any contacts who might
have info on this, let me know :). Oh jeeze, nobody I've spoken to in well
over twenty years.
I'll shake a few facebook contacts and see.
-Dave
No need -- by some small miracle, I just now found it on the net (onone
of those weird PDF-aggregator robot spam sites, so yay for robot spam?)
by pure luck while searching for something generic like "dataram core
memory manual". No idea what the original source for this PDF is, but
I'mglad it exists.
For future reference: It's aDataram DR101 system.
I have a copy of the PDF up at
http://yahozna.dyndns.org/scratch/imlac/Manual_Dataram_Core_Mem_DR101.pdf (warning:
64mb PDF)
(an annotated scan of my board is at
https://plus.google.com/u/0/photos/117997069161125071032/albums/58769649993…)
Thanks!
Josh
I have a pair of core memory boards (which look to be
8kilobytes + parity) in
my Imlac, made by Dataram in the early 1970s (based on datecodes in the
machine, I'd say late 1973, early 1974). I can find no documentation on
them. They're labeled Imlac on the main PCB (P/N 01-12880-1), but Dataram on
the core plane, and interestingly, this Blog post on Dataram's site:
http://www.dataram.com/blog/?p=163
Has a very grainy picture of the assembly -- see the photo here:
http://www.dataram.com/blog/wp-content/uploads/2012/08/40yrs_7.png
So I believe the whole assembly (PCB + core plane) was actually made by
Dataram. I have some high-res scans up at:
https://plus.google.com/u/0/photos/117997069161125071032/albums/58762337385…
(See the last two images in the album.)
I'd love to find schematics for this, as it's the only part of the system I
do not have documentation for (and it's going to need some repair, as it's
got some fairly serious moisture damage -- some of the ICs are weathered
enough that they're unreadable).
I'm going to shoot a mail off to Dataram as
well, but I figure my odds there are pretty low.
Actually they're a pretty
clueful company...I'd say it's worth a try. (I
grew up not far from them, and several older friends and mentors of mine
worked there...I have lots of Dataram stuff)
26 May
26 May
6:42 a.m.
New subject: [cctalk] Re: Help identifying (and finding docs for) Dataram core memory board
On 05/25/2013 11:39 PM, Josh Dersch wrote:
Oh jeeze, nobody I've spoken to in well
over twenty years.
I'll shake a few facebook contacts and see.
No need -- by some small miracle, I just now found it on the net (onone of
those weird PDF-aggregator robot spam sites, so yay for robot spam?) by pure
luck while searching for something generic like "dataram core memory
manual". No idea what the original source for this PDF is, but I'mglad it
exists.
For future reference: It's aDataram DR101 system.
I have a copy of the PDF up at
http://yahozna.dyndns.org/scratch/imlac/Manual_Dataram_Core_Mem_DR101.pdf
(warning: 64mb PDF)
(an annotated scan of my board is at
https://plus.google.com/u/0/photos/117997069161125071032/albums/58769649993…)
Wow that was a lucky information score! Congrats! How unlikely was THAT?! :-)
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
> I have a
pair of core memory boards (which look to be 8kilobytes +
> parity) in
> my Imlac, made by Dataram in the early 1970s (based on datecodes in the
> machine, I'd say late 1973, early 1974). I can find no documentation on
> them. They're labeled Imlac on the main PCB (P/N 01-12880-1), but
> Dataram on
> the core plane, and interestingly, this Blog post on Dataram's site:
>
> http://www.dataram.com/blog/?p=163
>
> Has a very grainy picture of the assembly -- see the photo here:
> http://www.dataram.com/blog/wp-content/uploads/2012/08/40yrs_7.png
>
> So I believe the whole assembly (PCB + core plane) was actually made by
> Dataram. I have some high-res scans up at:
>
> https://plus.google.com/u/0/photos/117997069161125071032/albums/58762337385…
>
>
>
>
> (See the last two images in the album.)
>
>
> I'd love to find schematics for this, as it's the only part of the system I
> do not have documentation for (and it's going to need some repair, as it's
> got some fairly serious moisture damage -- some of the ICs are weathered
> enough that they're unreadable).
>
>
> I'm going to shoot a mail off to Dataram as
> well, but I figure my odds there are pretty low.
Actually they're a pretty clueful company...I'd say it's worth a
try. (I
grew up not far from them, and several older friends and mentors of mine
worked there...I have lots of Dataram stuff)
Cool, I've sent a mail and
we'll see. If you have any contacts who might
have info on this, let me know :).
4010
days inactive
4024
days old
5 comments
2 participants
participants (2)
-
derschjo＠gmail.com -
mcguire＠neurotica.com