>    So this is very simple to do. The real work in making a discrete 
>event simulation system has to do with making various statisical 
>distributes, etc. I think most of those are in Smalltalk-80 and 
>hence in Squeak. I also vaguely recall that there is some discussion 
>about this in one of the colored books (I think maybe the Blue Book).

We used to this framework when we taught VisualWorks.  When we moved 
to Squeak, we ported it to Squeak.  I just tried it, and it seems to 
mostly work in 3.1a (I tried "NothingAtAll aDoNothingDemo" and the 
event trace got created, but it ended in an error about a file 
already being closed).  All the distribution classes are there.

The changeset is at http://guzdial.cc.gatech.edu/st/sims.cs

Lecture notes on the Blue book simulations stuff (with explanations 
and demos) are at:
http://www.cc.gatech.edu/classes/cs2390_97_summer/lectures/introsims.html

Mark

--------------------------
Mark Guzdial : Georgia Tech : College of Computing : Atlanta, GA 30332-0280
Associate Professor - Learning Sciences & Technologies.
Collaborative Software Lab - http://coweb.cc.gatech.edu/csl/
(404) 894-5618 : Fax (404) 894-0673 : guzdial at cc.gatech.edu
http://www.cc.gatech.edu/gvu/people/Faculty/Mark.Guzdial.html