30 Apr
1999
30 Apr
'99
9:29 a.m.
At 10:19 PM 4/29/99 -0400, you wrote:
There are nine groups (3x3) each group has two sections. Each section
has 32 x 16 cores. That makes 9162 cores (3x3x2x16x32). They're on a
daughter board and there may be more on the bottom. Some of the cards are
marked in pencil "8K" and some are marked "16K".
Joe
Looks like a ROM built out of a diode array. I'd make a WAG that it's
a bootstrap for some computer, but I don't know what. Judging by the
content list, I'd say it's a 18-bit computer of some sort, but I don't
recognize the board form factor or the opcodes.
That's what I thought. It looks the codes are in octal since none of
them are greater than 7.
The second one is a core memory board that I
*think* may be for a Data
General computer. I picked up several of these and they're all made by
Dataram Corporation and appear to date from 1972. Their part number is
3010290. I took the cover off of one. Man, the cores in these are tiny!
They don't plug directly into a Nova's bus, at least. It's very likely
that these core cards plugged into a dedicated array backplane - note
the lack of bus interface circuitry near the edge connector, but obvious
core drivers. The array backplane would've contained other card(s) forming
the bus interface to the actual computer that used these core planes. If
you can give us the X by Y count of the cores, and tell us if the
cores are obviously divided into sections (12? 16? 18?), maybe we can
make more WAG's about where it plugs into :-).
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
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