From owner-freebsd-questions Sat Aug 8 10:56:03 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA06792 for freebsd-questions-outgoing; Sat, 8 Aug 1998 10:56:03 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from CLIENTS4 (clients4.hawaii.rr.com [204.210.96.14]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id KAA06732 for ; Sat, 8 Aug 1998 10:55:59 -0700 (PDT) (envelope-from art@neilson.ddns.org) Received: from neilson.ddns.org - 204.210.105.69 by hawaii.rr.com with Microsoft SMTPSVC; Sat, 8 Aug 1998 07:57:51 -1000 Received: from neilson.hawaii.rr.com [127.0.0.1] by neilson.ddns.org [127.0.0.1] with SMTP (MDaemon.v2.7.SP2.R) for ; Sat, 08 Aug 1998 07:45:31 -1000 Message-Id: <3.0.5.32.19980808074529.008227b0@neilson.ddns.org> X-Sender: art@neilson.ddns.org X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.5 (32) Date: Sat, 08 Aug 1998 07:45:29 -1000 To: djv@bedford.net From: "Arthur W. Neilson III" Subject: Re: FreeBSD Cc: freebsd-questions@FreeBSD.ORG In-Reply-To: <199808081112.HAA05016@lucy.bedford.net> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-MDaemon-Deliver-To: freebsd-questions@freebsd.org Reply-To: art@neilson.ddns.org Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG At 07:12 AM 8/8/98 -0400, you wrote: >Brandon Lockhart wrote: >> >> You can only have >> one operating system loaded at a single point in time (correct me if I am >> wrong). > >You're wrong :) The IBM mainframe OS, MVS, will run several OS's on >the same machine, simultaneously. Each user gets his own OS. This >is very cool... > >It does this by presenting the user with a complete virutal machine >(registers, memory, IO devices, ...) on which the user can load >another operating system. or, for real sport, another copy of MVS >itself, which then would create virtual virtual machines for virtual >users... Each user has a rather complete illusion that he is the >sole user of the machine. > >Moreover, MVS runs like a bat out of hell. > >Alas, multiuser interactive machines are obsolete. Obsolete? Really? I don't think so. The IBM mainframe market is alive and well in the business world. Especially in the industry I am in, financial systems. Every bank I have ever heard of has an IBM mainframe in their DP shop! >MS-DOS isn't really an OS. It's a semi-adequate boot monitor. >(The boot rom of a Sun workstation is more complicated than MS-DOS.) > >Dave >-- > Bedford County, PA -- 47,000 polite, friendly Appalachians, > 4,000 of whom have concealed-carry permits. > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-questions" in the body of the message > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message