Need Info on DEC 11/84 Board, M8190 - test-drb@ccmp.vtda.org

18 Oct 1998

...
 I have one -AB that has a socket for the FPJ11 and one
-AB that doesn't
have a socket installed.  Are these the same board? 
I would gusess so (assuming that it really is a -AB revision and
some handles haven't been swapped around.)
...
   Is installing a
socket on the board without one difficult (being it's multilayered)? 
Not so bad if installed pin-at-a-time.
...
 I have a couple of 1MB M7458-AH (MSV11-RA) PMI boards.
Although the
Micronotes refer only to MSV11-J boards, I assume that what it has to
say applies to the MSV11-R also? 
Amazing!  Someone actually read the micronotes!  About 3/4 of the
Q-bus questions asked here are answered in great technical detail
by the micronotes, yet it seems like most folks still ask without
bothering to consult them...
Yes, the MSV11-R's are just as PMI as the -J's.
...
 I also have a 4MB non-PMI board.  What sort of
performance loss do I
get by using the non-PMI memory? 
It depends on the I/O vs CPU memory load.  It's a visible performance
gain, but not incredible - I'd say 10-30% for most things.
...
   My goal is to run 2.11BSD, so more
memory may be better than faster memory. 
1 Mbyte is sufficient for 2.11BSD, and 2 Mbytes is more than
enough.
Tim.