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From: jay@splut.UUCP (Jay Maynard)
Newsgroups: comp.arch
Subject: Re: Horizontal pipelining
Message-ID: <261@splut.UUCP>
Date: Wed, 25-Nov-87 08:08:29 EST
Article-I.D.: splut.261
Posted: Wed Nov 25 08:08:29 1987
Date-Received: Sun, 29-Nov-87 17:45:28 EST
References: <201@PT.CS.CMU.EDU> <388@sdcjove.CAM.UNISYS.COM> <988@edge.UUCP> <3801@ptsfa.UUCP>
Sender: root@splut.UUCP
Organization: Confederate Microsystems, League City, TX
Lines: 29
Keywords: multiple users
Summary: Nope. Doug had it right.

In article <3801@ptsfa.UUCP>, dmt@ptsfa.UUCP (Dave Turner) writes:
> >In article <988@edge.UUCP> doug@edge.UUCP (Doug Pardee) writes:
> >>OS/MFT became (was the basis for) OS/VS1.  OS/MVT was the basis for OS/VS2.
> >>Release 2 of OS/VS2 was the first MVS.  Inevitably, OS/VS2 Release 1 became
> >>known to history as SVS.
> I thought that OS/VS1 was called SVS.
> Locally, we called VS1, SVS and VS2 (release 1), MVS right from the start.
> IBM didn't like the labels. Finally, they called OS/VS2 Release 2, MVS.

Actually, Doug had it right. OS/VS2 release 1 was called SVS, because it
provided a single virtual address space (0-16 MB). OS/VS2 release 2 (did
anyone actually run it, or was release 3 the first to see actual use? I was
never clear on that point) provided multiple virtual address spaces, with
each user's storage (except for defined common areas - the nucleus and
common work areas) separate and unaddressable between address spaces. One
address space was (normally) assigned to each TSO user, each batch job, and
each started task. There are, in later releases, several auxiliary address
spaces for system use.

Source for most of this: IBM manual _MVS System Overview_ (no, I don't have
the number - the book's at the office, and I'm at home.)

OS/VS1 was simply called VS1, except for those people who called it bleh...

-- 
Jay Maynard, K5ZC (@WB5BBW)...>splut!< | uucp: uunet!nuchat!splut!jay
Never ascribe to malice that which can | or:  academ!uhnix1!--^
adequately be explained by stupidity.  | GEnie: JAYMAYNARD  CI$: 71036,1603
The opinions herein are shared by none of my cats, much less anyone else.