| Blast Effects on ZX81 | Subroutine simulates laser, cannon shot and other effect used in arcade-type games. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Cardioid Plot | Plots a heart-shaped curve. | Sinclair ZX81, Type-in program |
| Dear Editor | Letters about power supply ripple; keyboard labels; crashing; jack connections; where to get parts; saving programs. | |
| Diagonal Lines | You can make 45 degree angles with two nested FOR-NEXT loops. | Sinclair ZX81, Type-in program |
| Dice Roll | This program turns your ZX80 into a totally fair dice roller. | Sinclair ZX80, Type-in program |
| Entrapment | This game pits you against your computer. | Sinclair ZX81, Type-in program |
| Getting Acquainted with Your ZX81 | This British book is a good way to move beyond the ZX81 manual if you’re new to computers. | Sinclair ZX81, Timex/Sinclair 1000 |
| Machine Code -- CP Branching Tests | CPs are 1-3 byte codes that compare two numbers. More exactly, they subtract the number you are looking for from what has been loaded into the accumulator. | Sinclair ZX80, Sinclair ZX81 |
| Machine Code Programming -- Understanding the Stack | Often when writing machine code (MC) programs, it’s useful to keep the MC above RAMTOP. But few people understand how to move RAMTOP and the Z80’s stack pointer from within MC. | Sinclair ZX80, Sinclair ZX81 |
| Machine Code Screen Fill | Simple 16-byte machine code program fills the screen with any character. | Sinclair ZX81, Type-in program |
| Memotech 64K Memopak | The Memopak is undoubtedly the ultimate memory expansion for the Sinclair. Try DIM A(9500)! | Sinclair ZX80, Sinclair ZX81 |
| News, New Products and Services (Syntax v3 n6) | New products offerings from Gladstone, Memotech, Instant Software, Sinclair, Hopper & Company, Robill Products, Dilithium Press, data-assette. | |
| Printing on the Bottom Line | Here are two different ways to PRINT where you aren’t supposed to. | Sinclair ZX81, Type-in program |
| Printing Strings Faster | Use a full-length string of characters to print a bar graph instead of plotting each section. | Sinclair ZX81, Type-in program |
| Program Improvements | Improvements to Big Characters, Line Renumbering and Powers of Negative Numbers. | Sinclair ZX81, Type-in program |
| Shifting Maze | This program prints a maze on a 1K ZX81. Run in SLOW for best effect. | Sinclair ZX81, Type-in program |
| Sine Name | Print any string in the form of a vertical sine wave. | Sinclair ZX81, Type-in program |
| Spaces in REM Statements | If you put your machine code in large REM statements, you need not laboriously type in spaces or digits. | Sinclair ZX81, Type-in program |
| String Function Translation for 8K | Equivalents of LEFT$, RIGHT$, MID$ and TL$. | Sinclair ZX81, Type-in program |
| Syntactic Sum Loader | Machine code routine to help assure correct program entry. | Sinclair ZX81, Type-in program |
| Syntax Errors | Error corrections for previous articles. | |
| Syntax Quarterly Debuts Nov. 82 | SQ, The Syntax Quarterly, will be available by subscription and on newsstands Nov. | |
| Syntax ZX80 Updates Name | SYNTAX ZX80 now answers officially to its abbreviated name, SYNTAX. | |
| Teach Kids to Count with the ZX81 | Some education theorists suggest that learning to count and read is enhanced if you create a large, sharp image in a child’s mind. This image should be easily recognized and repeated often. Rapidly moving TV pictures get credit (and blame) for generating very powerful attention-grabbing images that anyone watching learns quickly. With your ZX81 and | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| The Expandable ZX80 and ZX81 | Author offers seven documented projects and several ideas for additional projects. | Sinclair ZX80, Sinclair ZX81, Timex/Sinclair 1000 |
| Two Problem-Solving Circuits: Preregulator and Battery Backup | Add a voltage regulator to your Sinclair power supply; build a batter backup unit. | Sinclair ZX80, Sinclair ZX81 |
| Upcoming Shows and Exhibitions | | |
| Users' Groups | | |
| Video Upgrade Kits for ZX80 in US Again | Once again ZX80 and MicroAce owners can enjoy the flicker-free qualities of ZX81/TS1000s | MicroAce, Sinclair ZX80 |
