| 16K RAM Pack Schematic Corrections | Corrections to problems with the 16K RAM pack schematic printed in SYNC 1:5. | |
| Battleship Solitaire | [Figure: Drawing of a warship] Battleship was a game we used to play as kids (and later)—with pencil and paper before the toy manufacturers plasticized it. You remember—each of you placed some number of “ships” of various sizes in a coordinate grid “ocean” and then took “shots” at each other by calling out coordinate locations in turn. | Sinclair ZX80, Type-in program |
| Dice and Train | [Figure: Drawing of a pair of dice] I recently got a copy of Creative Computing’s Basic Computer Games and of More Basic Computer Games to find more challenge for my 8K ROM and 16K RAM ZX80, but before turning to the really long programs I could not resist trying to squeeze two of the smaller ones into 1K for the 8K ROM. | Sinclair ZX80, Sinclair ZX81, Type-in program |
| Glitchoidz Report | Corrections to GRA+PIX; Mini-Billboard; The PEEK Function and POKE Command; An Inventory System; The Hidden Chessmen. | Sinclair ZX80, Sinclair ZX81 |
| Hardware Helpers | Reset button, high contrast inverse video. | MicroAce, Sinclair ZX80 |
| 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. | Sinclair ZX80, Type-in program |
| Kitchen Sync | As has already been said in the pages of SYNC and elsewhere, Clive Sinclair deserves some sort of medal for introducing a much improved version of an already popular computer and selling the new version at a lower price. You don’t find deals like that often these days, on either side of the Atlantic. | Sinclair ZX81 |
| Letters | 8K ROM Double Images; Taxman; An Inventory System; Hampson's Plane; Flag Use Tip; ZX80/81 World; The Great Circle Route. | Sinclair ZX80, Sinclair ZX81 |
| Linear Regression | The “Linear Regression” Program 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 | Sinclair ZX80, Sinclair ZX81, Type-in program |
| Lunar Lander | [Figure: Moon over a rugged lunar landscape] 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. | Sinclair ZX80, Sinclair ZX81, Type-in program |
| 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! | MicroAce |
| Perceptions | 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. | Sinclair ZX80 |
| Resources (Sync v2 n1) | Listing of new user groups, books and other resources. | |
| Sinclair 8K ROM Problems? | How to check for defective 8K ROM. | |
| 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 | MicroAce |
| 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. | Sinclair ZX80, Sinclair ZX81, Type-in program |
| The ZX80 as a Cipher Machine | Implementation of the Vigenere cipher. | Sinclair ZX80, Type-in program |
| 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. | Sinclair ZX80, Type-in program |
| Try This | This columns will feature short programs to show off your computer, impress your family and friends, and tickle your imagination when SYNC arrives at your place. We invite your contributions. Address them to: Try This, SYNC, 39 E. Hanover Ave., Morris Plains, NJ 07950. | Sinclair ZX81, Type-in program |
| 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. | Sinclair ZX80, Sinclair ZX81 |
| Window | [Figure: Drawing of a snowy window] Since the ZX81 uses the powerful Z80 microprocessor, it is a good system for which to write machine code programs. In the past months while writing many programs, I have found that there is one feature lacking on the system: a machine language monitor. | Sinclair ZX81, Type-in program |
| Writing for SYNC | If you have material you want us to consider for publication, we are very much interested in looking at it. If it fits our editorial needs at that time, we will send you a “Transfer of Copyright Agreement” to sign and payment for your article. | |
| 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 can do just that, and for very little money. | Sinclair ZX80 |
