Create a Word Search Puzzle
By using this program in the ZX80 or MicroAce, you can create your own 15 by 11 character word puzzles and have fun solving them or give them to your friends to solve.
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Sinclair ZX80
Letters
8K ROM Double Images; Taxman; An Inventory System; Hampson’s Plane; Flag Use Tip; ZX80/81 World; The Great Circle Route.
Perceptions
4K and 8K ROM Command Conversions 4K and 8KROM Command Conversions In the last issue of SYNC (1 :6) I began a discussion of the conversion of programs from the 4K Integer Basic to the 8K F.P. (Floating Point) Basic and covered expressions and functions. In this issue I will conclude the discussion by detailing
The Game of Life Revisited – An Assembly Version
The Game of Life, printed in SYNC 1:2 (pp. 28-30), was written in Basic. This Basic program may be replaced with an assembly subroutine which displays each succeeding generation within a fraction of the time needed by the Basic program. Each generation is constructed and then displayed by using another assembly subroutine for creating a
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How to Invent a Game – Inside Flattop Lander (MCD)
The conception and initial game design of Flattop Lander and the Machine Code subroutine that will produce an instant display.
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Glitchoidz Report
Corrections to GRA+PIX; Mini-Billboard; The PEEK Function and POKE Command; An Inventory System; The Hidden Chessmen.
Understanding Floating-point Arithmetic: Part 1
The aim of this article is to give the reader some insight into the complex world of floating-point arithmetic. Since the 4K ROM provided only integer arithmetic, readers who possess only this ROM will be unable to try the programs. Nevertheless they will be able to follow the text.
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The ZX80/1 As Fortune Cookie
In addition to reputed oracular powers, the I Ching has proven to be a source of fascination for mathematicians and computer scientists. This ancient Chinese system of divination comprises one of the earliest known examples of a binary counting scheme.
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Defuse
You are the Chief of Security in a major government building. You have just received a telephone message from a terrorist group claiming that they have planted a bomb somewhere in the building. Fortunately, you have the most sophisticated electronic detection equipment available. Your detector gives off a signal that gets stronger as you get
Examining Prime Numbers: Two Programs
The first of the two programs below tests a set of numbers to see which members of the set are primes. The program asks for (and enters with INPUT statements) the beginning and the end of the set and displays those numbers in the chosen set which are primes.
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Motorcycle Race Game
Test your skill and luck on a ZX80 motorcycle! In this game you compete with another rider on a 32 mile track on which you meet various obstacles and road conditions. The key to winning the race is meeting the obstacles with just the right speed.
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