*BSD News Article 27188


Return to BSD News archive

Path: sserve!newshost.anu.edu.au!munnari.oz.au!constellation!news.uoknor.edu!ns1.nodak.edu!netnews.nwnet.net!news.uoregon.edu!gaia.ucs.orst.edu!news.cs.indiana.edu!usenet.ucs.indiana.edu!vixen.cso.uiuc.edu!howland.reston.ans.net!agate!headwall.Stanford.EDU!leland.Stanford.EDU!jonathan
From: jonathan@leland.Stanford.EDU (Jonathan Stone)
Newsgroups: comp.unix.bsd
Subject: Re: How was BSD written?
Date: 11 Feb 1994 00:52:53 GMT
Organization: DSG, Stanford University, CA 94305, USA
Lines: 19
Distribution: world
Message-ID: <2jekt5$let@nntp2.Stanford.EDU>
References: <CKxEpn.1Lq@candle.uucp> <1994Feb9.055849.9351@nuchat.sccsi.com> <2jctac$qkd@mail.fwi.uva.nl>
NNTP-Posting-Host: kahului.stanford.edu

Casper H.S. Dik (casper@fwi.uva.nl) writes:

>steve@sccsi.com (Steve Nuchia) writes:


>>I always wondered how sysVr4 was written.  Did the AT+T programmers
>>implement virtual memory and TCP/IP from published specifications,
>>or did they have access to BSD code?

>The virtual memory came from Sun.

Whose VM system was derived from 4.2BSD, if I recall correctly.
Didn't SunOS 3.x use a "machine-independent"  VM system
that *was* VAX virtual memory structures, and translate in
software to the Sun-2/Sun-3 MMU?

Yes, it's a nitpick, Sun's VM system changed for SunOS 4.x;
I don't know how *much* because I've never studied the SunOS source.
My point is simply that the ancestry is *there*...