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From: arnold@emory.CSNET.UUCP
Newsgroups: mod.computers.vax
Subject: Vax BI + Unibus (unix)
Message-ID: <8607111914.AA14189@ucbvax.Berkeley.EDU>
Date: Thu, 10-Jul-86 16:50:09 EDT
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Posted: Thu Jul 10 16:50:09 1986
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We are looking to upgrade two 780s (running 4.2 BSD, soon to be 4.3 BSD)
with something in the 8000 series. However, Unix only understands Unibuses
and Massbuses.

Now, I have heard that on machines with a VAXBI, one can plug a Unibus into
a VAXBI, and then put Unibus peripherals into the Unibus. Fine. But, is that
transparent to the operating system, or does the OS have to know that there
is a VAXBI there? In other words, could we get an 8500 (say), plug our
unibuses and massbuses in, and then boot 4.3? Or is that impossible.

Please respond by mail, as I don't read this newsgroup. Simple explanations
are preferred, as I really don't know a lot about most of this sort of
stuff.

Thanks,