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Path: utzoo!watmath!clyde!caip!andromeda!argus!ken
From: ken@argus.UUCP (Kenneth Ng)
Newsgroups: net.followup
Subject: Re: FYI: VM systems on the net
Message-ID: <383@argus.UUCP>
Date: Fri, 25-Jul-86 01:35:13 EDT
Article-I.D.: argus.383
Posted: Fri Jul 25 01:35:13 1986
Date-Received: Sat, 26-Jul-86 05:44:16 EDT
References: <6340MW9@PSUVM> <-121460420@sysvis> <455@valid.UUCP>
Organization: NJ Inst of Tech., Newark NJ
Lines: 44

In article <455@valid.UUCP>, gelfand@valid.UUCP (Brooks Gelfand) writes:
> As to the 'OS' label, VM is more than an operating system. When a user
> logs on under VM, rather than just being a process each user thinks 
> he has his own 370 complete with control registers, general registers,
> PSW, memory and I/O devices as allocated in the directory. Thus you
> have your own Virtual MACHINE - hence the name VM. In this machine
> you IPL (boot) whatever operating system (OS) you want (and have
> access to) e.g. CMS, MVS, DOS/VSE, UNIX. You don't like these?
> There is a good assembler with CMS; write your own. The advantages of this
> system are obvious. If a program in one virtual MAchine does something
> that would crash the machine, only that virtual machine goes down. The
> other users continue to operate. The only effect they see is a slight
> increase in speed, since the crashed 'machine' is not using any cycles.
> Since VM handles all the I/O, it is an excellent system for people who
> who are debugging Physical IOCS. Vm will not let the user move the 
> disk heads outside their alloted area even with PIOCS. Thus one user
> cannot corrupt anothers files by accident  or even on purpose.
> 
> Last but not least, VM will run on both the PC/XT370 and the PC/AT370.
> It runs slowly but it runs. 
> 
> Brooks Gelfand
> ...!hplabs!pesnta!valid!gelfand

Heck, and there is one feature that I found interesting about VM,
VM can be run on top of VM, which is great for playing around with
the operating system internal, since you can't damage the real OS
when your playing with your own.

-- 
Kenneth Ng:
Post office: NJIT - CCCC, Newark New Jersey  07102
uucp(for a while) ihnp4!allegra!bellcore!argus!ken
soon uucp:ken@argus.cccc.njit.edu
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	     or  ken@orion.bitnet
soon bitnet: ken@orion.cccc.njit.edu
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