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From: paul@devon.lns.pa.us (Paul Sutcliffe Jr.)
Newsgroups: comp.unix.xenix.misc
Subject: Re: XENIX Versions (what are they?)
Message-ID: <1991May21.035251.1986@devon.lns.pa.us>
Date: 21 May 91 03:52:51 GMT
References: <1991May16.174028.4280@dartvax.dartmouth.edu> <7CDBBC9@xds13.ferranti.com>
Organization: Devon Computer Services, Lancaster, PA, USA
Lines: 34

peter@ficc.ferranti.com (Peter da Silva) writes:

+---------
| pete@othello.dartmout (Pete Schmitt) writes:
| > I currently have an Altos 586 with xenix 3.0e installed.  I've
| > seen versions 2.2 & 2.3 mentioned on the net, but I can't believe that
| > this version is newer because it is dated 1986.  
| 
| They changed the numbering from 3.x (as in System III) to 2.x at some point,
| I suspect it had to do with System V.2 or some silly thing like that.
+---------

No, here's the difference:

Microsoft Xenix (not SCO) versions through 2.4 were based on Unix V7.
Early Altos system used Microsoft Xenix 2.[34].  Tandy ported Microsoft
Xenix 2.3 to their Model 16, calling it TRS-XENIX 1.0.

Microsoft Xenix 3.0 was based on Unix System III.  Altos used this
release for their ?86 boxes.  IBM released it for the AT, calling it
IBM Xenix 1.0.  Tandy ported it to the Tandy 6000 (and upgraded Model
16's), calling it Tandy 68000/Xenix 3.0.

Microsoft Xenix System V began a new version numbering scheme.  IBM
released it for their AT, calling it IBM Xenix 2.0.  SCO got control
of Xenix from Microsoft and continued issuing revisions beginning with
that 2.0 number.  Last I checked, they were at 2.3.something.  Of
course SCO Xenix System V/?86 version 2.3 shouldn't be confused with
Microsoft Xenix version 2.3.  :-)

- paul

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