*********************************************************
***          Periodic Table 89              *************
***                                         *************
***      including the StarScroller!        *************
***                                         *************
***     coded by 1998 Henrik Jönsson        *************
***       <HenrikJ_007@hotmail.com>         *************
***                                         *************
***     Version 0.7 Alpha for the Ti-89     *************
*********************************************************

This is not a finished program, but only an alpha-release.
There are a lot of features missing in this verison that will
be added later.

The reasons for me to release this version is to be able to
recieve feedback so that changes can be made before it is
too late and also to give everyone a chance too look at it
even though it is not yet fully completed.

This is also the first program ever that I have made in
68k-assembler. 

********************************************************
Disclaimer
********************************************************
Because of this, there may be more bugs than can be
expected in a finished program, so be aware that it may
crash your calculator! (Always make a backup of important
variables before runnning any assembler program!). I can
take no responsibility whatsoever for any damage
caused by this prgram.

********************************************************
Requirements
********************************************************

 * a TI-89.

    It will probably run on a Ti-92 Plus (I haven't tried),
    but it wouldn't look good since I use the unused (on the TI89)
    video memory as temporary storage. Sorry!

 * PlusShell v1.0 Alpha
    
    I think it should work with DoorsOS too, if the required
    libraries from PlusShell are installed. I haven't tried
    that though. The final release will definitely support both
    DoorsOS and PlusShell.

 * The following libraries are required:
       gray4lib
       util

   They should be the libraries from PlusShell v1.0 Alpha. Make
   sure about that!

     - You can find these libraries at:
       http://www.ticalc.org

 * About 10 Kb of free memory before running the program

********************************************************
Ok, now that's settled, on to the fun things!
********************************************************

********************************************************
The StarScroller
********************************************************
This is the introduction (replaces a dull title screen)
I think it shows nicely the power of the TI89 (even
though it isn't optimized very much!!)
There are 600 stars and realtime scaling of the logo.
Pretty cool, huh? Increase the contrast if you have trouble
seeing the stars, I would recommend a slightly darker setting
for the screen than what is normal during the starscroller.

********************************************************
The Periodic Table, moving around
********************************************************
 Keys are

 Arrows	        : Move around the table
 2nd+Arrows     : Move fast (4 squares) around the table
 Diamond+Arrows : Move to Top / Bottom / Far left / Far right
 Enter		: Show information on selected element
 Apps		: Bring up the main menu
 Esc		: Quit Program

********************************************************
Moving in a menu (Main menu or Browse Names Menu)
********************************************************
 Keys are

 Up/Down	: Move in menu
 2nd+Up/down	: PageUp / PageDown
 Diamond+Up/Down: Move to top / bottom
 a-z		: Shortcut to items beginning with a letter
                  Works in the Browse Names Menu only
		  (note: you must use alpha-a to access a,
                  contrary to how the Catalog of the TI89 works)
 Enter		: Select item
 Esc		: Quit menu

********************************************************
The Main Menu
********************************************************

 Browse names	: Browse all elements by name.
		  Implemented, but no information on selected
                  element is displayed (not implemented yet)
 Browse symb.	: Browse all elements by symbol. NOT IMPLEMENTED.
 Startup:On	: Turn On/Off starscroller at startup. NOT IMPLEMENTED.
 Menus:Slow	: Change how fast menus appear. NOT IMPLEMENTED.
 View Stars	: View the starscroller
 Quit		: Exit the program

********************************************************
What will be added to the final version?
********************************************************

 All options in the main menu will be available.

 More information about every element (currently
 only mass, symbol and name).

 This includes element type, freezing & boiling point and more!

 What information about the elements would you like to see in
 a future version of the Periodic Table 89? Please e-mail me at
 <HenrikJ_007@hotmail.com>.
 I will not add too much information though, since I would like
 to keep the program reasonable small. (Compression of the data
 might appear in a later version).

********************************************************
Thanks...
********************************************************
- Florian Drevet for the Zguide
- Jimmy Mårdell for the 68kguide & tetris code which a looked
  at for ideas now and then!
- Thomas FERNIQUE who wrote the MegaCar code that I glanced at
  a couple of times...

********************************************************
Coded By
********************************************************
Henrik Jönsson
<HenrikJ_007@hotmail.com>