Date: Sun, 9 Aug 1998 10:40:12 +0930 From: Greg Lehey <grog@lemis.com> To: djv@bedford.net, Brandon Lockhart <brandon@engulf.net> Cc: freebsd-chat@FreeBSD.ORG Subject: Re: FreeBSD Message-ID: <19980809104012.P14475@freebie.lemis.com> In-Reply-To: <199808081112.HAA05016@lucy.bedford.net>; from CyberPeasant on Sat, Aug 08, 1998 at 07:12:01AM -0400 References: <Pine.BSF.3.96.980807214036.29587B-100000@engulf.net> <199808081112.HAA05016@lucy.bedford.net>
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(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
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