MicroVAX II

From: Antonio Carlini <Antonio.Carlini_at_riverstonenet.com>
Date: Mon Nov 25 05:08:00 2002

>Which connector are you referring to? The KA630 and KA65x both use the
>same console bulkhead, and in turn use the same two cables that connect
>it. The KA630 and KA65x do of course use different memory boards, but the
>ribbon cable that connects them is the same. Those are the only 3
>connectors that I can think of offhand, except for the Q/CD bus
>connectors...

The over-the-top connector in question is the one used to connect
the memory cards to the CPU; sometimes also called the PMI connector.

The KA630 one and the KA650 one(s) are different. The KA630 one
does have some issue in a KA650 system, but I don't know exactly what
the problem is. IIRC the KA630 one has three connectors (two mem boards
max) so a four connector one (three memory boards) would be a KA65x one.
(I don't have part numbers and a quick google didn't help).

This may, of course, have nothing to do with your actual problem.

>Well, *none* of the memory boards are faulty :)

OK - if you know they work, that's different.

>For some reason, they seem to not be getting clean power, so they are not
>working properly. I won't know for sure until I get my scope probes, but I
>expect to see lots of noise on the power supply output that happens to
>power most of the chips on those boards.

Antonio
Received on Mon Nov 25 2002 - 05:08:00 GMT