27 May
2007
27 May
'07
5:26 a.m.
The Remote Diagnostic modules were property of DEC and were supposed to be
removed
when the machine went off service contract.
The machines run fine without them -- but the RS232 console connection and
some other backplane cables IIRC need moving when you pull 'em.
Bill
On 5/26/07, Mr Ian Primus <ian_primus at yahoo.com> wrote:
--
--
d|i|g|i|t|a|l had it THEN. Don't you wish you could still buy it now!
pechter-at-gmail.com
Our 11/750 didn't have one, and I don't
think the
power-up self-test
requires it.
OTOH, the DWBUA requires a UET module.
So far, I haven't gotten far enough to find out wether
my Unibus terminator I'm using is right, but I think
it should. I think it's a M9302, it came from an
11/84. I am having problems with the Vax though, but I
can't see them having anything to do with the Unibus.
At powerup, I get the message ERR RAM:90, and the RD
FAIL lamp is lit on the front. I have also gotten
RAM:C0 errors, and I believe one other number. On the
RDM board (L0006) there appears to be like two dozen
9114 RAM chips, and they're soldered to the board. I
have a couple of spare 2114's (the 9114 is the same,
from what I know) but I don't know which chip needs to
be replaced. Normally, I'd substitute one at a time,
but since the chips are soldered, that isn't much of
an option. So... any way of correlating the error
numbers to the failed chip, or do I need to just start
guessing?
Will the machine even work without the RDM? I get the
>> prompt and can enter commands there, and
all seems
well. But when I hit ^D and get into the RDM> prompt,
keys typed don't display, and the cursor moves around,
sometimes forward a couple cells, sometimes backwards.
Enter seems to work though, giving me a new RDM>
prompt, although no other output can be generated, and
I can't seem to get back to >>> without shutting the
machine off.
-Ian