UNIX V 11/70 vs VAX HELP ! - (nf)

[jab at uokvax.UUCP]

#R:ihuxa:-54400:uokvax:6200029:000:1239
uokvax!jab    Jun 16 03:09:00 1984

/***** uokvax:net.unix-wizar / ihuxa!gpw /  7:51 pm  Jun  7, 1984 */

   I am in need of information on the differences between
System V UNIX* on an 11/70 versus an 11/780 (VAX). Specifically
the following:

	Is an 11/70 capable of performing the full
	implementation of System V UNIX ?

					G. P. Wilkin
					(AT&T NETWORK SYSTEMS)
					ihnp4!ihuxa!gpw
/* ---------- */

Doug Gwyn pointed to the newer "features" such as the "shell layers" facility.
A lot of "add-on" packages, such as the Ethernet package from AT&T that runs
on top of System V, ignore the PDP-11 entirely. It would be up to YOU to
port such things over and make it work, and it's not clear that it's
worth the effort.

Also, the 1024 bytes/block filesystem isn't honored on the PDP-11 under
System V, probably because they don't want to play games with the size
of SABUFS that count against the precious kernel D space.

The game of fitting a lot of things into a 64K address space gets old; even
with text overlays, you can only put so many things into the kernel D space.
(George Goble at Purdue and Peter Staubach here at OU have done a little work
with data overlays, but it's not fun and not feasible (possible?) to do in
a general way.)

	Jeff Bowles
	Lisle, IL