From owner-freebsd-chat Sat Aug 8 18:28:42 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id SAA21428 for freebsd-chat-outgoing; Sat, 8 Aug 1998 18:28:42 -0700 (PDT) (envelope-from owner-freebsd-chat@FreeBSD.ORG) Received: from allegro.lemis.com (allegro.lemis.com [192.109.197.134]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id SAA21403 for ; Sat, 8 Aug 1998 18:28:38 -0700 (PDT) (envelope-from grog@freebie.lemis.com) Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by allegro.lemis.com (8.9.1/8.9.0) with ESMTP id KAA05475; Sun, 9 Aug 1998 10:40:14 +0930 (CST) Received: (from grog@localhost) by freebie.lemis.com (8.9.1/8.9.0) id KAA24675; Sun, 9 Aug 1998 10:40:12 +0930 (CST) Message-ID: <19980809104012.P14475@freebie.lemis.com> Date: Sun, 9 Aug 1998 10:40:12 +0930 From: Greg Lehey To: djv@bedford.net, Brandon Lockhart Cc: freebsd-chat@FreeBSD.ORG Subject: Re: FreeBSD References: <199808081112.HAA05016@lucy.bedford.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.91.1i In-Reply-To: <199808081112.HAA05016@lucy.bedford.net>; from CyberPeasant on Sat, Aug 08, 1998 at 07:12:01AM -0400 WWW-Home-Page: http://www.lemis.com/~grog Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org (moved to -chat) On Saturday, 8 August 1998 at 7:12:01 -0400, CyberPeasant 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... Nowadays the operating system is called OS/390, also known as UNIX 95. I thought it was VM that ran multiple operating systems, not MVS. > 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. First I've heard of it. I haven't been keeping much track of the 360 family in the last 10 years or so, but before that they were decidedly CPU bound. Greg -- See complete headers for address and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message