| A Keyboard Learning Game | New users of the Timex/Sinclair computers sometimes spend a long time hunting for a specific key. The keys that are not used frequently remain hard to find. Keygame is intended to help the user become familiar with the keyboard and to have some fun while learning. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| A Machine Code Graphics Line Drawing Subroutine | In the pages of the ZX81 manual, we find a Basic subroutine to draw a line between any two specified points (see Listing 1). However, I found this routine to be exceedingly slow, especially when I wanted to draw several lines on the screen and had to wait several agonizing minutes to get them. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Attention Readers: You Can Review Products for SYNC! | We are overwhelmed! New peripherals and software are coming out for the Timex/Sinclair computers at an astonishing rate. So fast, in fact, that our in-house reviewers can’t keep up with it all. Hence, we would like to invite readers to write reviews for us. Some products we receive here and will forward to qualified reviewers. | |
| Block Transfers: Variables Transfer (Part 2) | One drawback of Timex/Sinclair computers is that LOADing a program erases any data that you have in the variables area to make room for in-coming variables. However, the program developed here allows you to keep variables in the machine safe from NEW, CLEAR, and LOAD. | Sinclair ZX81, Type-in program |
| Building Heat Load | This article gives a program for calculating your building heat load. You may not find all the answers, but you can get a preliminary comparison of some of the options. The program is designed to find the heat load by solving two equations. | Sinclair ZX81, Type-in program |
| Curve-plotting Graphics | Curve-plotting has many applications. For example, an oscilloscope is a curve-plotting device which allows the user to view time-varying voltages. This article presents a program which allows the Timex/Sinclair computers to be used as curve-plotting devices. The common representations of curves possible with this program include the following: Cartesian, Cartesian Parametric, polar, and polar parametric. | Sinclair ZX81, Type-in program |
| Flicker-free Four Times Normal Character Scrolling | Programming an active display without the flicker and flash is one of the challenges confronting the ZX80 user. So far the programs published in SYNC with flicker free display possibilities have some limitations: 1) the program must stay in machine language; 2) all computing must be done during the vertical blacking period; or 3) everything must be timed just right. | Sinclair ZX80, Type-in program |
| Glitchoidz Report | ZX Destroyer; Just for Fun (2:5); Block Transfers. | |
| Hot-Z | HOT Z is a valuable tool for the machine language pro or novice. | Sinclair ZX81 |
| Just For fun | Mousetrap; Unvader; Draw and Store; Number Nine; Eliminator | Sinclair ZX81, Type-in program |
| Large Letters for the 8K, 2K Machine | Getting personal and small business computers out into homes and small offices depends on having software support available. The software writer must use his imagination and every tool he can find to make his programs self-prompting, fast, and easy to use. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Letters | Comet Crusher; DEF; Draw It; Strong KBD Signals; List Learning; Pantry Inventory; Lunar Lander. | Sinclair ZX81, Type-in program |
| Line Print Utility | Reading computer-style text, where the words get chopped off at the end of the line, is easy enough once you get the hang of it. However, if the printout of a program is intended for use by people not used to this style, it is friendlier to PRINT out the text in a more legible format. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Mazogs | Jim Beloff reports in “The Zedex Microfair” on the enthusiasm of the fair goers for the adventure game Mazogs. We share that enthusiasm. In Mazogs you are an adventurer searching for a treasure in a HUGE maze. | Sinclair ZX81 |
| Meditations on a Hypotrochoid | The plotting capacity of the ZX80(81) enables even the least artistically talented to create some pretty dazzling displays. The much denigrated sine and cosine functions conceal mathematical mysteries that are invisible to mere number crunchers. | Sinclair ZX80, Sinclair ZX81, Type-in program |
| Random Walks | Most students of statistics are familiar with the “Random Walk” problem: A person passes through a series of doors and after each he is presented with the choice of turning right (with fixed probability P) or turning left, and thereafter encounters another door. | Sinclair ZX81, Type-in program |
| Renumbering Basic Statements | Many versions of Basic have a Renumber utility. This is used to renumber Basic statements starting at a specified statement and spacing statements with a given increment between the statements. For example, if the starting number is 4 and the increment is 7, the lines in the Basic program would go: 4, 11, 18, 25, 32, etc. Most programmers start their programs at statement 10 and use increments of 10. | Sinclair ZX81, Type-in program |
| Resources (Sync v2 n6) | Listing of new user groups, books and other resources. | Timex/Sinclair 1000 |
| Sea War | Sea War is another excellent fast action graphics game that was a hit at the Microfair. The game starts by scrolling from right to left a very impressive “title page” asking for the number of players (the limit is 2). | Sinclair ZX81 |
| Sync Notes | SYNC at the Drawing Board; Theme Sections Coming; The ZX81 BASIC Programming Manual; SYNC is Growing! You CAn help! | |
| The Quicksilva Programmable Character Generator | The Quicksilva Programmable Character Generator: £26; Motherboard: £12; Edge Connector: £4. Quicksilva, 95 Upper Brownhill Rd., Maybush, Southhampton, Hants, U.K. The Quicksilva Programmable Character Generator is a single circuit board which plugs into the QS Motherboard or the QS Edge Connector which plugs into the back of the ZX81. | Sinclair ZX80, Sinclair ZX81 |
| The Zedex Microfair | Touted as the "largest single display of ZX products under one roof anywhere," this 4th ZX Microfair more than lived up to its reputation. The fair offered 80 tables worth of hardware, software, peripherals, books, etc. for the ZX81 and Sinclair Spectrum. | |
| Try This | Type in the program listing below. Then RUN the program and watch the results. The program takes about 15 seconds to finish RUNning. Then try different values for lines 50 and 70. The values 8 and 136 produce an interesting display. | Sinclair ZX80, Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Turtle Graphics | Have you ever wished for an easier way to create graphics displays on your Sinclair computer? You can always use a line drawing program and a table of coordinates, but setting up the table can be tedious. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| WARP 81: Making a 4K Program Run in 8K | Details converting a specific program to work with 8K ROM Sinclairs. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Your Timex/Sinclair Can Become a Terminal | Build a 8251 USART interface to connect a Sinclair to a modem. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
