*BSD News Article 22870


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From: vixie@vix.com (Paul Vixie)
Newsgroups: comp.unix.bsd,comp.unix.questions
Subject: Re: Vax 11/750 and BSD (and AT&T)
Date: 26 Oct 1993 14:13:24 -0700
Organization: Vixie Enterprises
Lines: 17
Message-ID: <2ak3tk$r98@gw.home.vix.com>
References: <1993Oct25.045559.738@mcs.drexel.edu> <1993Oct26.082505.16404@usage.csd.unsw.OZ.AU> <1993Oct26.095709.2617@cc.usu.edu>
NNTP-Posting-Host: gw.home.vix.com

In article <1993Oct26.095709.2617@cc.usu.edu> ivie@cc.usu.edu writes:
# > Indeed, does there exist a completely AT&T free 4.3BSD (or any Unix 
# > for that matter) that runs on the VAX?
# 
# No. The VAX-specific code in the Net/2 source tree is tied to the old
# (pre-Mach) virtual memory system. That all needs to be redone.

The VM stuff is actually pretty easy since Mach 2.5 ran on a VAX and the
code for pmap.c is available from CMU.  The hard part is all the CPU
support, memopry exception handlers, locore, and device drivers.  As
someone else has remarked, it's only worth doing if you love VAXen -- if
all you want is a BSD machine, get an Intel.
-- 
Paul Vixie
Redwood City, CA
<paul@vix.com>
decwrl!vixie!paul