I have an illustration in my DG "Installation and Packaging for Data
General Products" 014-000605-02 - it is 1.5 inches thick 14 7/8 x 11,
covering Nova 2 thru 4, Eclipse S/100 thru MV/1800, MP/100, MP/200 and
various peripherals - really handy for jumper settings and the like.)
that appears to match up (3 rows of 6 jumper positions each), but with
different labelling. I also have this very board in my Nova 4 -- but
apparently with less memory than you have.
The illustration is thus in my book:
o o o o o o
w w w w w w
2 4 6 8 10 12
o o o o o o
w w w w w w
1 3 5 7 9 13
o o o o o o
According to this chart, then, you have w1, w3 and w5 inserted.
The book says that w1, w3 and w5 are ALWAYS inserted and that w2, w4 and
w6 are NEVER inserted. This is consistent with what you have and with
what I have in my machine.
The board can be populated as 32KB, 64KB, 128KB and 256KB.
For a 256KB board, no other jumpers are inserted.
For a 128KB board, W7 is inserted.
For a 64KB board, W7 and W9 are inserted.
For a 32KB board, W7, W9 and W11 are inserted.
If yours is indeed 256KB (128K words) then no other jumpers should be
present, and your board is jumpered as one would expect according to the
doc.
*My* board has every other row present, and so is a 128KB board. I thus
have 4 rows out of the total of 8 populated, with 15 chips per populated
row (and 5 empty spots in each of the populated rows). w7 is inserted,
as one would expect from the doc. And, on my board the labels are the
same ones you are seeing: 16, 17, 18, 19, 0, 1 (So I have 16, 17, 18
and 19 inserted in the "0" row -- the same as w1, w3, w5 and w7, above).
Jay
On 6/17/2012 10:02 AM, Camiel Vanderhoeven wrote:
On Sun, Jun 17, 2012 at 6:30 AM, Jay Jaeger<cube1
at charter.net> wrote:
Update. I did just find some DG Doc, in the Nova
4 16 Slot Illustrated Parts
Breakdown (016-000940-00) that I have.
Curiously, for 120v, they show Hot going to Pin *** 4 ***, but the plug
otherwise wired exactly as I described in my previous message. But, I think
that is in error, and one should wire hot to pin ***3 *** for 120V.
For 240V they show Hot going to pin 3, neutral to 9, and ground to 5 (and
6). For 240V the only interconnects they show are from 1 to 11 and from 4
to 7 (as opposed to 4 to 8 for 120V). Again, I think that hot pin 3 is in
error, and (probably) for 240V, one should wire hot to pin 4 BUT I HAVE NO
WAY TO VERIFY THIS.
HOWEVER, I did go back and re-verify what I wrote earlier on both my Nova/4
and (now) my S/140 as well and both have pin 3 as HOT. All 120V of it.
Other than that, the interconnections I described below match the doc. The
only variance is between hot for 120v (I say pin 3, they say 4) and hot for
240v (they say pin 3).
Go figure. (Unfortunately, I don't have power supply drawings that I can
use to arbitrate).
Thanks Jay,
Using this, I was able to get the power supply going. All voltages
check out OK, so after some careful examination I've plugged in the
CPU board. The expected output on the console port is the "O" from
"OK"; the K isn't printed because there's no memory.
Powered it on, and after some twiddling with the console cable pinout
(weird one) yes, there's the "O".
Installed the memory board, powered it on again, and alas, still "O"
rather than "OK". The Field Engineer's Reference says that that means
a memory failure.
Of course, the memory board could be faulty, but it could also be a
matter of incorrect jumper settings on the memory board. I haven't
been able to find a description of these yet.
The board says "DGC BBU MEMORY", and contains 8 x 16 AM9016DPC ic's
(4116 equivalent). That makes it 128 16-bit kilowords of memory (no
parity or ECC, although there are 5 empty spots per row).
There are 6 jumper positions labeled 16,17,18,19,0 and 1; each can
have a jumper in the 0 or in the 1 position. My board has a jumper in
the "0" position for jumpers 16, 17 and 18. No jumpers in the other
three positions:
o o o o o o
1
o o o o o o
0 | | |
o o o o o o
16 17 18 19 0 1
Is anyone familiar with these?
Camiel