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From: jbn@wdl1.UUCP
Newsgroups: net.lang.lisp
Subject: Re: Recoding Lisp programs in C
Message-ID: <743@wdl1.UUCP>
Date: Mon, 7-Oct-85 01:24:08 EDT
Article-I.D.: wdl1.743
Posted: Mon Oct  7 01:24:08 1985
Date-Received: Sat, 12-Oct-85 14:27:54 EDT
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Organization: Ford Aerospace, Western Development Laboratories
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Nf-ID: #R:bcsaic:-32400:wdl1:18900007:000:531
Nf-From: wdl1!jbn    Oct  6 19:48:00 1985


    So, you get a fatal exception, the program reinitializes, rereads its
sensors, gets minimal long-term info from non-volatile storage, and continues.
Real-time programs have to be able to do this anyway, since you may have to
recover from a transient fault.  I've seen a Boeing 767 go through a full
electronics restart when switching from APU to ground power; it takes about
a second before all the displays are updated again.  That's how it has to work.
That's the way real-time programs are usually written.

					John Nagle