On 5/12/2013 11:18 PM, Dave McGuire wrote:
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 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'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 :).
Thanks,
Josh
-Dave