	GASSIM.ZIP or Diskette
	----------------------
	Content:

	Complete Package, Version 2.10E(nglish); see DIR.LST for
        completeness check;
	README:    Calling up this file
	LIST  :    Showing this file
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	Installation:
	-------------
	To use the programs in 'GASSIM' you have to 'unpack' the files.
        GASSIMZ.EXE is the selfextracting file with the complete share-
        ware set. You can use GASINST.BAT to install the programs in a 
        subdirectory Drive:\GASSIM.
	From diskette: When the DOS-prompt shows A:\> or B:\>, type:
		'GASINST A: C:<cr>' or 'GASINST B: C:<cr>' where C: is any
	[hard]disk drive of your choice.
		<cr> means: type <carriage return>, or <enter> or 
        Downloaded GASSIM.ZIP from a MailBox: You now have already
        'unzipped' the archive. Just type
                'GASSIMZ C:<cr>' or use 'GASINST Dr1: Dr2:', where Dr1:
        is the directory[\subdirectory] you are now on, Dr2: where you want 
        to put the \GASSIM [sub]directory.
	The unpacked files, ready to run, use 680 kB of disk space.
	You can also install GASSIM onto a RAMdisk (especially recommen-
        ded) or onto a floppy disk. Since the simulations make disk input,
        floppy drives may be too slow to run the programs. But you can still
        use one for storing the unpacked set, e.g. for copying them onto
        a RAMdisk.  
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	The programs expect MS-DOS Version 3.3 or later. To find out,
	whether your computer has such a version, type 'ver<cr>' at
	the DOS-prompt. The main program GASSIM.exe is compiled for a
        286 or higher CPU, the 8086 or 8088 machines being too slow.
	-----------------------------------------------------------
	For the GASSIM program a SVGA, VGA, or IBM8514 Graphics card
	is required. The program autodetects the card.
	If it does not find one of those mentioned an error condition
	is announced. See below for other graphics cards.
	Color is essential to see all the features. However a mono-
	chrome monitor does also work. LCDs are not satisfactory
        unless they have an active matrix. The movements of the
        particles otherwise get blurred too much.
	The programs work both with or without math co-processor. They
	are, however, slow without it.
	GASSIM and COLLIS90 need a mouse.
	-----------------------------------------------------------
        The program IDEALCGA is a simpler version of the gas simula-
        tion. It only requires a CGA-display (320x200 4 colors) and
	works satisfactorily without co-processor. But it lacks
	many features and especially the authoring and tutorial
	variants and can, therefore, not show the included demon-
	strations. Just type
		idealcga<cr>
	to use it. For many qualitative demonstrations, e.g. in secon-
	dary schools, gas behavior can be shown adequately with it.
        Similarly IDEALBAR and IDEALEGA are variants of this simple
        version but have 16 colors. IDEALEGA also has the commands on
        screen like GASSIM and, therefore, is well suited for the
        learning phase of the program.
	-----------------------------------------------------------
	The program COLLIS90 explains by graphical means the algo-
	rithms used for reflection and collision. You need a mouse
	to input coordinates of molecules. Type
		collis90<cr>
	to use the program. It also shows the complete collision
        physics as explained and derived in Explanations 8) by
        animation of the processes.
	COLLISIO is an animation of the interactions and collisions of
	two van der Waals molecules. It is also explained in Expl. 8)
	and in two opening screens, when you type
		collisio<cr>.
	Explanations 8) and 1) to 7) can be called from GASSIM and the
	three IDEAL... programs by typing or clicking 'E'. 
	------------------------------------------------------------
	GASSIM:
	After the installation you are in the subdirectory \GASSIM. Press
              GASSIM<cr>
        You get into the GASSIM menu.
        Press 'T' and then choose 'Info' in the list of tutorials by
        clicking the left key of your mouse to read about some aspects
        of manipulating the program.
	Having returned to the menu press again 'T'utorial and watch any
        number of the included demos to get a feeling for what the program
	can do. You may return any time to the Menu by pressing 'Q'uit.
	Now choose 'F' and the program is all yours. Go through the list
	of commands by clicking (left) into the bar where the mouse cursor
        is located. After having done this you are an expert GASSIM user!
        When you click the right(!) mouse key while being in the left(!)
        half of the screen you zoom into the experiment alone which now
        fills the whole screen. The commands are then no longer visible.
        Either you know them by heart by now or you just press 'I' to return
        to the zoom-out screen where they are again visible. You can also
        return there by clicking the right mouse key. 
	If on your tour you use commands by key and mouse click intermixed
	some of the white bars on the command list might become 'sticky'.
        Just press 'Ctrl-S' (hold Control key down and press S) or click
        into the '^S'-bar which gives an updated view.
	When you have used the program for some time you probably want to
	register one of your sequences of commands which has produced an 
	interesting aspect of gas physics. Just go into 'L'earnmode und 
	replay the sequence. When you are done leave it by 'Q'uit. In the 
	Menu you see the name of the new addition to the Tutorials. Type 'T' 
	and click on the new name to watch again what you have composed.
	Since 'name.igs' is pure ASCII-Text you can edit it easily. You
	also have to fill in the 'name.mnu' mask with some background
	information on what your simulation is supposed to show. Just
	open some of the accompanying '*.mnu' files to see how it is done.
	For a short description of GASSIM see 
	      CHIMIA 48(1994)26-29; INTERFACE(Switzerland)1(1993)16
	------------------------------------------------------------
	------------------------------------------------------------
	As stipulated by all major professional software houses, even
	for very expensive programs, I include the usual disclaimer
	applicable 'a fortiori' to an 'amateur'-programmer:

	The author disclaims all warranties as to this software, whether
	express or implied, including without limitation any implied war-
	ranties of merchantability, fitness for a particular purpose,
	functionality or data integrity or protection.
	------------------------------------------------------------
	------------------------------------------------------------------
	Copyright: GASSIM is (c) 1992,94 E. Schumacher, University of Bern
        Address: Kalchackerstrasse 69, CH-3047 Bremgarten, Switzerland
	Phone/Fax: +41(0)31 302-6307   Email: schumacher@iac.ube.ch
	------------------------------------------------------------------

	Further Notes:

	This is not Freeware nor Public Domain Software. It is Shareware.
	If you plan to use this program regularly or in the classroom you
	have to register for it:
	
	A) Single CPU License:                 $  49.--
		This includes one 3 or 5 inch floppy disk with the package.
		When you register you receive the latest version of the  
                program.  

	B) Site License (for schools):         $ 120.--
		Identical to A) plus the following privileges:
		The site license gives the right to duplicate the diskette
		or GASSIM installation as necessary to be used on one site.
		It also contains the whole source code in BorlandPascal V.7
		and Assembler. This might be valuable to you in order to
                add features to the simulation. The source is profusely
		commented.
		
	An order form is included as ORDERGAS.TXT. You can print it by
	typing 
		copy ordergas.txt prn<cr>

	The proceeds from the software sale is invested in the develop-
	ment of new simulation and teaching software for chemistry. The
	author has no other financial source for this activity.

	From the same author:
	In preparation and available as preliminary versions:
		- Quantum Chemistry
		- Spectroscopy
		- Application of Group Theory (a Mathematica Notebook)
		- Polya's enumeration of Isomers and the Symmetric Group

	Available now:                                     Single License
		- Chemical Kinetics                            $  80.--
		- Statistical Thermodynamics                   $  80.--
		- Chaos in Chemical Reactions                  $  50.--
		- Pattern Formation in Biology                 $  80.--
		- Freshmen Chemistry Computer Demonstrations   $  80.--