Date: Sat, 08 Aug 1998 07:45:29 -1000 From: "Arthur W. Neilson III" <art@neilson.ddns.org> To: djv@bedford.net Cc: freebsd-questions@FreeBSD.ORG Subject: Re: FreeBSD Message-ID: <3.0.5.32.19980808074529.008227b0@neilson.ddns.org> In-Reply-To: <199808081112.HAA05016@lucy.bedford.net> References: <Pine.BSF.3.96.980807214036.29587B-100000@engulf.net>
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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
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