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From: DMS%MIT-OZ@MIT-MC.ARPA
Newsgroups: net.unix-wizards
Subject: Unix and real time control
Message-ID: <133@sri-arpa.UUCP>
Date: Tue, 24-Apr-84 11:23:00 EDT
Article-I.D.: sri-arpa.133
Posted: Tue Apr 24 11:23:00 1984
Date-Received: Mon, 30-Apr-84 05:46:40 EDT
Lines: 25

From:  David Siegel <DMS%MIT-OZ@MIT-MC.ARPA>

Hi,

We are planning to use a Vax 11/750 in a real time control
application. Rumor has it that Unix is not very good for real time
control. This leads to two questions:

1) Is the rumor true, and if so what are the problems?

2) Are there any verions of Unix floating around that are especially
   designed for real time applications.

Note: 
  We are using the vax to servo actuators for a robot at rates that
  vary from 40 to 300 cycles per second. We will be needing interrupt
  response from the vax, although it is not clear how fast a response
  rate we need.

Should we stick with VMS, or will some Unix handle our needs
adequately?

Thanks for any help you can give.

-Dave & Sundar