===============================
CHANGES FROM VERSION 1.3: SimPy
===============================

:Author: Klaus G. Muller
:Contact: kgmuller@users.sourceforge.net
:Author: Tony Vignaux
:Contact: vignaux@users.sourceforge.net
:Date: $Date: 2003-12-22 16:42:54+01 $
:Revision: $Revision: 1.0 $
:Web-site: http://simpy.sourceforge.net/

This document addresses the difference between SimPy versions
1.3 and 1.4 in terms of changes and additions.

For details, see the SimPy 1.4 manuals.

Changes
=========

Monitor
-------
	- Module *Monitor.py* has been merged into module *Simulation.py*
      and all *SimulationXXX.py* modules. Import of *Simulation* or any
      *SimulationXXX* module now also imports *Monitor*.

	- Some *Monitor* methods/attributes have changed. See Manual!

	- *Monitor* now inherits from *list*.

New style classes
-----------------
	- All classes in the SimPy API are now new style classes, i.e., they inherit from *object*
      either directly or indirectly.

Additions
==========

Histogram
---------
	- A class *Histogram* has been added to *Simulation.py* and all
      *SimulationXXX.py* modules.

SimulationRT
------------
	- A module which allows synchronization between simulated and wallclock time.


SimulationStep
--------------
	- A module which allows the execution of a simulation model event-by-event,
      with the facility to execute application code after each event.

SimGUI
------
	- A Tk/Tkinter-based module which provides a SimPy GUI framework.

SimPlot
-------
	- A Tk/Tkinter-based module which provides for plot output from SimPy programs.

