"Scelbi's Galaxy Game for the '6800'"
By Robert Findley (Scelbi Computer Consulting, Inc.)
ISBN: None
Copyright 1977


Description from the Back of the Book:
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Captain your own crusading starship against the logic of your "6800".  Your 
mission: search-and-destroy a random number of alien ships.  But, don't run 
out of time, out of fuel, out of ammunition or out of the galaxy.  Your 
galaxy consists of 64 quadrants, subdivided into 64 sectors.  Plan your 
mission to destroy all aliens.  But, every time you move you lose a stardate 
and precious fuel.  Don't run into a roaming star that could damage your 
ship!  And, don't forget how much fuel your warp factor uses!

Suddenly, "Condition RED!  Alien in sight!"  How big is he?  Fire a phasor or 
torpedo?  He's damaged or destroyed.  But, you've used up valuable fuel!  
Does he fire back?  How much fuel was used for protective shields?  Be 
careful.  You're running out of time and fuel.  You get the idea.  You must 
maneuver logically, strategically, carefully... to complete your mission.

Here's the multidimensional computer game you've asked for.  Using the 
original manufacturer's recommended mnemonics and assembly format, with 
hexadecimal notations, you've got a total book form program in machine 
language, for 4K memory, with flow charts, illustrations and more.


Introduction
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Imagine yourself as captain of a space ship traveling throughout the galaxy.  
Your mission is to seek and destroy all alien ships to make the galaxy safe 
so that other ships from your planet may journey into outer space.  Due to 
the urgency of the mission it must be completed within a given time.  If the 
mission is not completed with-in the time allotted, the safety of all future 
voyages is in jeopardy.  Your space ship is supplied with a limited amount of 
fuel and weapons so you must choose your course and attack strategy 
carefully.  Mission control has placed space stations at various points in 
the galaxy for refueling.  A space station contains a limitless amount of 
fuel and weapons.  However, don't get caught too far from a space station 
with your energy low or you may end up drifting endlessly through space.

As an aid in searching the galaxy, the space ship is equipped with a galaxy 
scanner which is capable of displaying three different degrees of detail.  
The short range scan provides an accurate picture of the immediate quadrant 
through which the space ship is currently traveling.  Your location and that 
of any alien ships, stars, and space stations in the quadrant are defined by 
exact sector coordinates.  The long range scan displays the contents of the 
eight quadrants surrounding the quadrant you presently reside in.  The wide 
angle scanner provides a view of the total galaxy from which you can plot 
your course.

The space ship is equipped with two types of weapons.  The PHASOR is an 
energy discharge device which homes in on all enemy ships in the immediate 
area and directs specified amounts of energy at each.  This energy, if enough 
to destroy, will completely eliminate the alien ship.  However, should the 
alien ship survive the attack, it will retaliate by shooting back at your 
ship. It is important that you keep the energy in your ship's protective 
shields at sufficient levels to withstand any possible retaliation from the 
enemy.  The other weapon available is the TORPEDO.  It is capable of 
destroying any alien ship on impact. The target must be in direct line of 
sight of the space ship for the torpedo to reach its destination. A missed 
torpedo shot results in immediate retaliation by the alien ship.  Also, be 
careful when there is a space station in the area.  If the torpedo hits it, 
the space station is destroyed.

Now, turn your imagination into the realm of reality by transforming your 
small computer system into the control station of the space ship.  Each move 
by the space ship is controlled by the computer operator and the 
responsibility of the total mission is placed on the operator's shoulders.  
The GALAXY program presented here will allow one to make this transformation 
by loading the program as presented, and simply adding the appropriate I/O 
routines for one's specific I/O setup.  Or, it can be expanded by revising 
the command operations or adding new commands to make the game more complex, 
and modifying it to take advantage of special I/O devices which the reader 
may have associated with one's computer system.  The number of possible 
variations are limitless.  The operation of this program is explained in 
detail to aid those that desire to make revisions and additions to its 
operation. 


Table of Contents
-----------------

Introduction

Chapter 1 - Operation of the Galaxy Program

Chapter 2 - System Requirements

Chapter 3 - Data Table, Messages and Subroutines

Chapter 4 - Major Routines of the Galaxy Program

Chapter 5 - '6800' Assembled Listing

Chapter 6 - Sample of Galaxy Operation