Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!aramis.rutgers.edu!topaz.rutgers.edu!ron
From: ron@topaz.rutgers.edu (Ron Natalie)
Newsgroups: comp.os.misc
Subject: Re: why rare? [was: Re: Realtime OS's]
Keywords: Realtime
Message-ID: 
Date: 5 Jul 88 22:55:08 GMT
References: <10450@udenva.cair.du.edu> <8411@pur-ee.UUCP> <797@taux01.UUCP> <11053@sol.ARPA> 
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 11

Real time OS's aren't much harder than anything else.  Most computer
manufactueres offer their own real-time operating systems, the problem
is that there is no real portable, nice OS like UNIX to do real time.
Mostly because the demand just isn't there.  We live in a time share
world.  Many of us who have worked in research labs have hacked real
time support into UNIX of one sort or another.  As is usually the case
in RealTime support in a timesharing operating system, you essentially
give tyrannical powers to certain user mode processes.  Hence, real time
really works best on standalone systems.

_Ron