30 Nov
2012
30 Nov
'12
11:20 a.m.
On 11/30/2012 11:44 AM, Kevin Reynolds wrote:
After a bit of time away, I had time to allocate to
finally attempt to resolve this issue,
and apparently the problem was with one of the 16MB RAM cards. I have some other
RAM cards, but the ribbon connector was in a slightly different place, so I am not sure
its for the same era of machines (its a bit higher up on the PC Board... but it is
QBUS.
Right now its working as a grant card.
They should be in the same place if they're for a -II. The PMI RAM
cards for the -III are not compatible (it's a much faster bus with more
address bits) and they put the PMI connector in a different place to
prevent confusion between the two.
I'm glad to hear that you found the source of the problem. I have a
lot of MicroVAX-II RAM; contact me privately if you end up needing some.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA