Need Info on DEC 11/84 Board, M8190

From: David C. Jenner <djenner_at_halcyon.com>
Date: Sun Oct 18 14:14:58 1998

CLASSICCMP_at_trailing-edge.com wrote:
>

> A M8190-AB is a 15 MHz (11/73) CPU with "warm floating point", but
> *will* accept the FPJ11 as an option.

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? Is installing a
socket on the board without one difficult (being it's multilayered)?

> To further complicate matters, within digital the CPU is identified
> differently based on whether it has PMI memory installed or not.
> (And, of course, it matters whether the PMI comes before or after
> the CPU in the backplane!) So, for example, you may find a 18 MHz
> CPU with non-PMI memory called a 11/73, but with PMI memory it's called
> a 11/83.

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?

I also have a 4MB non-PMI board. What sort of performance loss do I
get by using the non-PMI memory? My goal is to run 2.11BSD, so more
memory may be better than faster memory. (Of course, I can always try
to find more, faster memory!)

Thanks,
Dave
Received on Sun Oct 18 1998 - 14:14:58 BST