Seeking "ultrixboot" for DS3100s -- where is it?

[Chris Siebenmann]

 We've got some DS3100s that we're trying to set up. They have local
disks, and we'd like them to boot as diskful clients (well, with root
on their own local disks, at least), but we don't have any tape drives
on them (at the moment, we've brought them up as diskless clients of
our 3800). I can them booting remotely with the local rz disk as root
and swap, but I can't get them to boot directly from it; they tell me
"can't open ultrixboot" and abort. So, does anyone know where the PMAX
ultrixboot is hiding, and how to convince the server end of the
diskless client stuff to load it off the tape?

 Thanks acres in advance; I'll post a summary of anything I learn
(along with how I persuaded the system to boot with only / local if
anyone is interested).

-- 
	"I shall clasp my hands together and bow to the corners of the world."
			Number Ten Ox, "Bridge of Birds"
Chris Siebenmann		...!utgpu!{ncrcan,ontmoh!moore}!ziebmef!cks
cks at white.toronto.edu	     or ...!utgpu!{,csri!}cks