From owner-freebsd-questions Sat Aug 8 04:24:28 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id EAA05296 for freebsd-questions-outgoing; Sat, 8 Aug 1998 04:24:28 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from lucy.bedford.net (lucy.bedford.net [206.99.145.54]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id EAA05291 for ; Sat, 8 Aug 1998 04:24:24 -0700 (PDT) (envelope-from listread@lucy.bedford.net) Received: (from listread@localhost) by lucy.bedford.net (8.8.8/8.8.8) id HAA05016; Sat, 8 Aug 1998 07:12:01 -0400 (EDT) (envelope-from listread) Message-Id: <199808081112.HAA05016@lucy.bedford.net> Subject: Re: FreeBSD In-Reply-To: from Brandon Lockhart at "Aug 7, 98 09:44:59 pm" To: brandon@engulf.net (Brandon Lockhart) Date: Sat, 8 Aug 1998 07:12:01 -0400 (EDT) Cc: freebsd-questions@FreeBSD.ORG X-no-archive: yes Reply-to: djv@bedford.net From: CyberPeasant X-Mailer: ELM [version 2.4ME+ PL38 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG 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. 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