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From: daryl@mitre.arpa
Newsgroups: comp.unix.questions
Subject: Re: real-time UNIX
Message-ID: <8976@brl-adm.ARPA>
Date: Mon, 24-Aug-87 16:08:40 EDT
Article-I.D.: brl-adm.8976
Posted: Mon Aug 24 16:08:40 1987
Date-Received: Tue, 25-Aug-87 04:34:08 EDT
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>Does anybody out there know anything about what kind of real-time
>Unix systems are available? (for things like automation, 
>control, robotics, etc...).  I would appreciate any pricing information
>you may have also.

>>there's Regulus from Alcyon in San Diego, Unos from Charles River Data,
>>and something-whose-name-i-forget from Emerge Systems in Indialantic, Florida.
>>Masscomp has RTX.  and that's just some 680x0 ones that i'm aware of.

The something-whose-name-was-forgotten is RTUX.  They would thank you for
at least remembering the company name.  RTUX runs real-time processes on
the native UNIX CPU at higher priority than UNIX processes.
Facilities are available to communicate with UNIX processes and to communicate
with other independent real-time processors equipped with RTUX executives
not using UNIX.  This technique permits UNIX to be used as the development
tool, operator interface, and mass storage handler, but also permits the
UNIX native CPU to process real-time data without being burdened by the UNIX
task switching overhead.  Where bus bandwidth is a problem, use multiple
bus architectures and additional real-time single board processors 
equipped with the RTUX stand-alone executive to share the task load.
General Motors (GMF) Robotics, Troy Michigan is a big customer.  Address
inquiries to Frank Aaron, EMERGE Systems, 114 6th Ave. P.O., Box 3175,
Indialantic, Florida 32903  (305) 723-0444.  Mention my name.


Another avenue to investigate is the suite pSOS, pROBE, pHILE, pRISM, and pUCP.
pSOS is a multitasking kernal for single board computers.  pROBE is a low level
debugger.  pHILE is disk file management system similar to UNIX's.  pRISM adds
multiprocessor capability to pSOS.  pUCP adds ability to communicate between the
UNIX system and other processors running pSOS.  Also, pUCP permits pSOS to be
emulated on the UNIX system.  Although pSOS is not an efficient real-time
solution on UNIX alone, it does permit marrying a UNIX system and external
real-time processors. The suite is made by Software Components Group, Inc.,
4655 Old Ironsides Drive, Santa Clara, CA. 95054.  Contact Linda Munz,
(408)-727-0707.  Mention my name.

					D.A.R.Y.L.


Daryl Crandall				daryl@dash.mitre.ORG
The MITRE Corporation			daryl@gateway.mitre.ORG
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