AMOS ASTEROIDS 05/May/91 
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        Public Domain By Mike Widdess 0494-451272
	
1. Introduction							

Here are four versions of the old Asteroids game, first seen in
arcades in the late 1970's, and then on the Atari console.
All the features are implemented, except hyperspace, which I regard as
a waste of processor power.
On Version 1 all graphics are computed rather than drawn by an
artist.
On the other versions the computed sprites are pasted onto the screen,
saved into 2 IFF files for sprites (4 colour), bobs (16 colour) and touched
up in DPaintII, and then converted back to a sprite bank by
2Iff_to_Ast6.amos, which is also on the disk.	

2. Loading

The disk should be write enabled to allow high scores to be saved.
The disk will autoboot, display Readme file then enter Ramos1.2 and
run the selection menu.
Or load workbench and double click on AstMenu.Amos, however beware of
low memory if you only have 512k, your workbench may need more memory
than the boot disk.

Choose the version you want to try, from the menu, the more 
colours, the slower the action.
(the sixteen colour version is probably the best).

Alternatively if you have AMOS then load AMOS and load AstMenu.amos
from the root directory of the disk.

The programs and data files are all in the mikewid drawer.
Files needed to run are Astxx.amos, title.iff, palette.iff,
asteroids.hi.

Ast6.abk is the sprite bank of the 16 colour version, not loaded,
as the bank is automatically saved with the program.

3. Playing the game.
	
The object of the game is to destroy as many levels of rocks
as possible, and avoid and destroy the alien ship which appears
when there are less than 4 rocks left, and you miss 4 times
in a row.

The game is played with a joystick in port 2.
    Left=       Rotate Left
    Right=      Rotate right
    Fire=       Shoot
    Forward=    Thrust - the ship will gradually accelerate while the
                stick is forward, to stop rotate 180 degrees
                and thrust again, the ship will decellerate gradually 
                while the stick is forward.	

The best tactic is to stay in the centre of the screen rotating
and firing, and only thrust to escape the alien ship, get behind
it and shoot it.

4.Scoring

    Large asteroids      -    100 
    Medium asteroids     -    200
    Small asteroids      -    300
    Alien ship           -    10000

    Extra ship every 20000

There is a high score table on disk. If you wish to start the 
high scores from scratch, delete mikewid/asteroids.hi,
a new version will be created with scores of 1.

The game disk must be write enabled so that high scores can be saved.
There is no way round this, other than alter the program.