UNIX 3.0

[utzoo!decvax!ucbvax!mhtsa!harpo!cbosg!cbosgd!mark]

UNIX 3.0 and 4.0 indeed do not page.  5.0 probably won't either.
They are looking into it but can't decide how to do it.

Note also that 3.0 and 4.0 will not run on a VAX 11/750, they only
work on a 780.  5.0 will work on the 750, I think.

Anyone considering the change should carefully examine the blurb
that Western puts out advertising System III (I have no idea why
they decided to call it System III, since internally it's UNIX 3.0).
There is a list of new features since V7/PWB.  This list contains
a whopping seven items - depressingly short.  Three of these seven
new features are new device drivers (KMC, synchronous terminals,
and a parallel communications link driver).  They also tout their
new tty driver (better than V7, for the most part, but also totally
incompatible, requiring lots of ifdefs).  The other features they
mention are named pipes (should take any good UNIX hacker half a
day to put this into V7 without peeking at 3.0), a new accounting
package, and generally newer versions of everything.

Now compare this to what Berkeley has done since V7.

There really are some good things in 3.0 that haven't been released
before.  Aside from the device drivers, they are mostly in user
programs that can plug into V7 or nBSD very cleanly, such as SCCS
and a much newer and better uucp, nroff, and make.  Also, consider
that what appears to be the same system runs on both the 11 and the
VAX - something that can't be sneezed at.  Finally, the licensing was
done really attractively.  There can be no doubt that everyone should
get a System III license, since that lets you run whatever you want
from PWB, V7, Berkeley, etc.  I hear that an educational license is
about to spring into existence, too.

	Mark