I have just checked-in support for VAXstation 3100 with KA41-CPU.
(VAXserver 3100) It works fine with root & swap over NFS, and can
also handle SCSI disks on its both SCSI buses, but the SCSI drivers
isn't 100% working yet.
I do not know if it works on KA42/420 CPUs, but I _do_ know that the
standalone le driver does _not_ work, so I haven't been able to test 
the kernel on that type of machines (e.g. m38, m48, ...)
Anyway, the code is checked in the source tree.
NOTE: To be able to correctly determine the amount of available memory
in MicroVAXen i use the value provided from VMB. This means; if you
upgrade the kernel you also must upgrade boot and boot block. Otherwise
almost anything can happen :-)

I will go away now and won't read my email for a week, so I wish you
out there good luck!

-- Ragge