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From: sdl@linus.UUCP (Steven D. Litvintchouk)
Newsgroups: net.lang.st80
Subject: Implementing the "Blue Book" Simulation Model
Message-ID: <307@linus.UUCP>
Date: Sat, 27-Sep-86 21:38:10 EDT
Article-I.D.: linus.307
Posted: Sat Sep 27 21:38:10 1986
Date-Received: Tue, 30-Sep-86 07:53:45 EDT
Organization: The MITRE Corporation, Bedford, MA
Lines: 25


Yes, I have gotten the simulation stuff in the blue book to work.
There are actually several typos, all of which should be more or less
obvious when you try to compile the code.

More serious is the fact that I had to play around with process
priorities to get the simulations to run.  I don't have the code in
front of me, but as I recall, in the scheduler where it does
"Processor yield", the simulation processes never seem to run. I had
to change the code to fork them with the next higher priority, in order
to get them to run.  I have never been able to decide whether that is
a bug in the blue book, or a bug in my Smalltalk implementation (I
have Softsmarts Smalltalk on my IBM PC/AT).  I can mail you the code
of that too.  I would be curious whether your implementation of
Smalltalk displays the same behavior.


Steven Litvintchouk
MITRE Corporation
Burlington Road
Bedford, MA  01730

Fone:  (617)271-7753
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