
             "Galaxy Invader 1000" for the Gameboy Advance
                             by Grumpy Cat

This is the first public release of Grumpy Cat's tribute to CGL's handheld
game "Galaxy Invader 1000" for the Gameboy Advance.


ABOUT THE LICENSE
=================
This software is provided AS-IS, free of charge and with no warranty.  It is
not guaranteed to do anything.  It is not guaranteed to do nothing.  The
program binary is not intended for use of any kind, and is not intended to be
loaded onto any computer system, handheld or otherwise and is only provided
to pad out the ZIP file to a respectable size.  Do not get wet.  Do not
feed after midnight.  Do not eat.


ABOUT THE GAME
==============
Grumpy Cat's "GI1000" is based on the CGL handheld game "Galaxy Invader 1000"
from around 1980.

It includes the following:
    + 3 levels of difficulty.
    + Samples from the real game.
    + Authentic flickering LED style graphics.


ABOUT THE CONTROLS
==================
Like the original game, there is no pause feature.  A game is restarted by
using the virtual power OFF/ON (START button) key.
  Start            Power on/off.
  Select           Change level (whilst "power" is off).
  Left             Move ship left.
  Right            Move ship right.
  A                Fire.


ABOUT THE TOOLS
===============
The following tools were used to develop "GI1000":
  Devkit Advance   Gameboy Advance code generation and libraries.
  crt0.s lnkscript Jeff Frohwein's Gameboy Advance linking and startup.
  CYGWIN           X-Window System, GCC for Win32, vi, development environment.
  Tile Studio      Sprite generation.
  MS Paint         Graphics editing.
  Paint Shop Pro   Graphics editing.
  FlashAdvance II  Flash card and linker software for the Gameboy Advance.
  Cool Edit 2000   WAV file capture and editing.


ABOUT THE GAMEBOY ADVANCE
=========================
I read pretty much everything I could find on programming the GBA, but my
two main sources of information were:
  "CowBite Virtual Hardware Specification" by Tom Happ.
  "Audio Programming on the Gameboy Advance" by Chris Strickland.


I hacked this little game together in about 2 weeks after finding my old
Galaxy Invader 1000 at the bottom of a box at the back of a cupboard.  I've
had the game since around 1980 and it still works!  I also found another
old game called "Astro Wars"...  Naaaaah.

It's silly and fun and cool.  I hope you enjoy it.


Grumpy Cat (grumpycatsoftware@yahoo.com)
http://www.geocities.com/grumpycatsoftware.
August 17th 2003.

