Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!caen!uflorida!travis!hrshcx!steved
From: steved@hrshcx.csd.harris.com (Steve Daukas)
Newsgroups: comp.realtime
Subject: Re: Realtime RISC?
Message-ID: <879@hrshcx.csd.harris.com>
Date: 6 Dec 90 14:19:17 GMT
References: <1990Dec4.193740.4430@nbc1.ge.com>
Organization: Harris Computer Systems - Fort Lauderdale, Fl.
Lines: 38

In article <1990Dec4.193740.4430@nbc1.ge.com>, scott@nbc1.ge.com (Scott Barman) writes:
> 
> However, I was looking at a few things and noticed that there seems to
> be a lack of realtime software/operating systems for RISC processor.
> Personally, I am not to thrilled with SPARC (not counting the 4/110 I
> live on daily), but I have only seen a few offerings for it.  I have
> seen processor boards using the AM29000 but no realtime support.
> 
> I am curious (because I could be looking in the wrong places), are there
> realtime operating systems/software/development environments for RISC
> processors? 
> -- 

Harris has a Real-Time Unix Kernal that runs on a M88100 RISC processor.
This was designed for "Hard Real-Time" environments, those needing
interrupt response times of less than 5 microseconds and context switch
times of less than 50 microseconds.  The Kernal is SVID and SVVS and POSIX.

Short of giving a sales pitch, the performance of this system is very
good.  It has been well received by the Simulation and C3I markets,
Radar applications, etc..  It does a good job of handeling the graphics
generation for flight simulators (a la Top Gun stuff).

Don't know if this is the kind of stuff you are looking for... If so,
get in touch with a local Harris Office.  If not (e.g., you don't
need microseconds and don't care about Unix) you can probably find
other sources.  Unfortunately, those companies who have real "real-time"
operating systems (milisecond response times or less) require the customer 
to buy the hardware as well as the software...

Steve
--

Stephen C. Daukas              | sdaukas@csd.harris.com  
Harris Corporation             | uunet!hcx1!misg!sdaukas  
Computer Systems Division      | (617) 221-1834, (617) 221-1830

     "Old MacDonald had an agricultural real estate tax abatement."