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From: "Carla Taylor" <Carla.Taylor@worldnet.att.net>
Subject: Re: Space Station S/W in Ada -- No Tasking?
Date: 1998/05/12
Message-ID: <6j85b0$ier@bgtnsc01.worldnet.att.net>#1/1
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References: <354dadfd.2883074@news.mindspring.com>
 <rracine.1.000A5CD6@draper.com> <354f8259.1275955@news.mindspring.com>
Organization: AT&T WorldNet Services
Newsgroups: comp.lang.ada
Date: 1998-05-12T00:00:00+00:00
List-Id: <comp.lang.ada>




> Boeing management had to be convinced?  I hesitate to ask,
> but how is the 777 avionics s/w structured?
> 
> Bob Munck
> Mill Creek Systems LC
> 
> 

In 777, tasking was not allowed.  Each "task" is written as a main
procedure, and proprietary hardware/software is used to 
schedule the tasks, gauranteeing that a each task will complete in its
allotted time, or have the processor forcibly taken 
away from it.  I don't know if this design was a Boeing decision or not.

Kevin Tucker