23 Dec
2004
23 Dec
'04
4:05 a.m.
The VAX
4000-300 CPU is indeed a KA670. If you have the later
backplane (I forget the right serial number sequence) then
you can upgrade to any of the later models (-400, -500, -600,
Easiest way to check is to pop the CPU/memory module cover
and pull the
boards - earlier models had the usual quad height
finger/socket connection
with a ribbon cable doing the cpu/memory interconnect while
the later ones
used the zero-force type white socket blocks found on the likes of the
HSD/HSZ RAID controllers and Alpha 1200 CPU modules.