Computer Combat!

The first question often asked about a new machine is “Does it play Space Invaders?” Though a 1K machine has considerable difficulty getting anywhere Computer Combat using only 1K, is a type of mini Space Invaders but with only one invader and one base and a much slower rate of firing.

The object of the game is to hit the invader as many times as possible before it lands or you run out of missiles. Twenty-five missiles normally are given but that can be altered by changing the value of B in line 5.

You receive five points for hitting it but lose one if you miss. Use keys 5 and 8 to move left and right respectively and key 0 to fire. The invaders’ missiles are shown as asterisks and yours as crosses. The program is good for beginners, as it is easy to understand the function of each line as there are none of the usual POKE and PEEK or other complicated functions.

If you want to get more memory, enter in direct mode the following be/ore entering the program: POKE 16389,68 followed by ENTER NEW followed by ENTER.

The program will run continuously until the BREAK key is used.

Computer Combat was sent in by 15-year-old Anthony Wells. (T/S1000/ZX81 16K)