SYNC v2 n1

Date: January/February 1982
Volume: 2
Issue: 1


  • You May Fire When Ready, Gridley!
    Have you ever wished that you could command a submarine, survey the sea through the periscope to locate the enemy fleet, and give the orders to fire your torpedos at the target ship? Well, now thanks to the ZX80 and the Torpedo Alley program from Zeta Software you ean do just that, and for very
  • Resources (Sync v2 n1)
    Listing of new user groups, books and other resources.
  • MicroAce Video Upgrade
    Smooth flicker free graphics has been the “impossible dream” for Sinclair ZX80 or MicroAce owners, at least until recently. It has been particularly frustrating to have the new 8K ROM and realize that this capability exists on the chip but is denied the ZX80 user! The MicroAce Video Upgrade was designed to eliminate this problem,
  • Letters
    8K ROM Double Images; Taxman; An Inventory System; Hampson’s Plane; Flag Use Tip; ZX80/81 World; The Great Circle Route.
  • Sync Notes
    MicroAce Discontinues U.S. Operations; Sinclair to Replace Defective MicroAce 8K ROMs; Sinclair Policy Change on Technical Phone Inquiries; Sync Notes U.K. Win a 1000 pounds
  • Sinclair 8K ROM Problems?
    How to check for defective 8K ROM.
  • Perceptions
    4K and 8K ROM Command Conversions
  • 16K RAM Pack Schematic Corrections
    Corrections to problems with the 16K RAM pack schematic printed in SYNC 1:5.
  • Kitchen Sync
    To Build or not to Build? A Review of the Sinclair ZX81 Kit
  • 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
  • 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.
  • Try This
  • Writing for SYNC
  • 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.
  • Hardware Helpers
    Reset button, high contrast inverse video.
  • Battleship Solitaire
    This Battleship Solitaire program allows you to play a similar game against the computer, but with the modification that you do all the shooting. Even though you have no ships to be sunk, you are still subject to penalties. Each time you fail to score at least one hit per salvo you lose one shot.
  • Lunar Lander
    You are the Command Pilot of the Lunar Lander SYNC. You are now in the final stages of your descent and you must make your landing before your fuel runs out. You select the thrust settings from your keyboard control system by pressing a key from 1 to 10. The computer does not wait for
  • Linear Regression
    Computes the linear relationship between two sets of variables, expressed as the linear regression equation, and calculates the coefficient of determination, an indicator of the strength of the relationship. Given a set of two variables labelled X and Y, the program will yield an equation describing Y as a function of X.
  • The ZX80 as a Cipher Machine
    Implementation of the Vigenere cipher.
  • Tioga Toads
    In the following program, three of these toads hop across the screen and announce their order of arrival at the finish line. When all of the toads have finished, the race results are printed on a scoreboard making lavish use of inverse characters.
  • Dice and Train
    Dice strictly speaking is not a game. By simulating the throw of a pair of dice, the computer calculates the distribution of the number of throws entered according to the number of spots the dice show. Be prepared for a wait if you enter a number like 5000. Train likewise is not exactly a game,
  • Window
    A machine language monitor is a utility, provided by most computer systems, which aids in the development of machine language programs. Its basic functions are: a) to allow you to view the contents of each byte in the system’s memory, and b) to allow you to change these values. The program provided here will allow


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