[Info-vax] Trying to boot a MicroVAX II with VMS 7.3

[Steven Schweda]

Robert Jarratt wrote:

> Regrettably I am not sure I know how much memory the machine has. I have yet
> to succeed in running any diagnostics. I do have two extra memory boards in
> the machine, they have MS630-B markings but I cannot tell if they are BA or
> BB, although I suspect they may be BB.

   The boards in my (powerless for many years) mu-VAX II have
M7609 in copper on the board, and M7609-xx stamped into the
metal frame.  The "M" number looks like a more reliable guide,
when combined with inspection to see if your 2/4MB board is
full or half-full.

   Alternatively, count the DRAM chips, look up the part
number to get the density, and divide by nine (eight bits plus
parity).