NetBSD and OpenBSD don't support Risc Server...

NEC made several different versions 'Arc standard'
hardware...
Some differences..
Risc server comes in at least to types ... one
with one SCSI controller another model  has two
SCSI controller's ...
Risc station's come in a least three types as
well... one is the image station (supported)
the second 2200(not supported) and
third 2250 (partially supported..
serial console only,no SCSI)..

I have seen some messages about
people considering  getting a NEC
mips machine... be sure it
is NEC "Image station" or
expect to write some new
drivers to support console display,
clock,interrupt controller and scsi...
YES all vary ... so much for the
'Arc' standard!