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From: Kilgallen@SpamCop.net (Larry Kilgallen)
Newsgroups: comp.lang.ada
Subject: Re: Boeing and Dreamliner
Date: 23 Jun 2003 07:23:08 -0500
Organization: LJK Software
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References: <20030619221951073-0500@library.airnews.net>
 <bd6lor$sq0$2@dagobert.svc.sysgo.de> <UnpZF+XVri0n@eisner.encompasserve.org>
 <3ef6f042$1@baen1673807.greenlnk.net>
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Date: 2003-06-23T07:23:08-05:00
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In article <3ef6f042$1@baen1673807.greenlnk.net>, "Martin Dowie" <martin.dowie@baesystems.com> writes:
> "Larry Kilgallen" <Kilgallen@SpamCop.net> wrote in message
> news:UnpZF+XVri0n@eisner.encompasserve.org...
>> I don't understand how a Memory Management Unit could keep one of those
>> partitions from grabbing all the CPU time.
> 
> The MMU doesn't but there are plenty of OS out there that allow mixed levels
> of criticality programs to sit quite happily in the same box. So you could
> have
> you flight control and your in-flight cinema on the same card, if you wanted
> ;-)

Trusting such software to be perfect is precisely what is avoided by using
hardware.