Publisher(s): Harvard Group, The
Started in November 1980 as Syntax ZX80 by Kirtland Olson to support the Sinclair ZX80, Syntax was the longest running professional magazine to support the Timex/Sinclair computers.
In August 1982, prior to the launch of the Timex/Sinclair 1000, Syntax ZX80 became Syntax.
The last issue was published at the end of 1984, just over five years after it started.
Syntax enjoyed a good relationship with Sinclair and Timex, often publishing authoritative information directly quoted from both companies.
| Title | Description | Computers |
|---|---|---|
| [Break Out of Program Expecting Input] | How to break out of programs stuck in loops that expect numeric or character input. | |
| [Computer Software Act of 1980] | Congress passed the Computer Software Act of 1980 to protect the rights of people and companies who write, develop, sell, or lease software. | |
| [Cut RF interference to the ZX80] | ||
| [Dann Weldkamp would like to hear …] | Reader in Iowa. | |
| [If you have a logic probe … ] | Use logic probe to record state of ICs in the computer. | |
| [MicroAce Owners…] | Sinclair’s owner’s manual is available by mail from Sinclair Research. | MicroAce |
| [Rochester Institute of Technology offers two intensive computer courses for deaf adults…] | ||
| [The 8K ROM produces a different screen display than the 4K ROM.] | Sinclair ZX80 | |
| [The following SYNTAX readers wish to contact …] | Readers from Califonia, Florida, Illinois, Maryland. | |
| [These readers would like to contact others…] | Readers in Illinois and Ontario. | |
| [These readers would like to hear …] | Readers in California and Texas. | |
| [These SYNTAX readers would like to contact …] | Readers from Louisiana and Nebraska. | |
| [These SYNTAX readers would like to hear …] | Readers from Kentucky, Nevada and Ontario. | |
| [These SYNTAX readers would like to hear from others in their areas] | Readers from Ohio, New York and Washington, DC. | |
| [These SYNTAX readers would like to hear…] | Readers from California and Texas. | |
| [Would you like a ZX80 interface to the outside world?] | ||
| $100 for Your ZX/TS; Up to $330 for Memotech | Memotech will buy back your Memotech Timex-Sinclair add-ons at 50% of current suggested retail value and even take your ZX/TS for $100—all credited toward your purchase of your MTX or FDX system. | |
| 1500s On Their Way, 2068s Close Behind | Our Timex source says a few TS1500s began their way to your local stores the first week of September. The FCC approved the TS2068 recently; expect it in stores by October. | Timex/Sinclair 1500, Timex/Sinclair 2068 |
| 16K RAM Approved; New Interface | Federal Communications Commission (FCC) approved Sinclair’s 16K RAM for the U.S. market. C.A.I. Instruments has completed work on three interfaces. | Sinclair ZX80 |
| 16K RAM power | ||
| 2K Conversion with 6116s | ZX81 will accept two 2114 RAM chips or one 6116 RAM, for total of 2K. | Sinclair ZX81 |
| 34 Columns — 8K | Program allowing text entry in a 34-column by 22-line display format within 2K RAM. Uses shift keys for space and backspace control. Includes the complete listing and instructions for loading and operating. | Timex/Sinclair 1000, Type-in program |
| 3D Monster Maze | Review of the game published by Melbourne House. | Timex/Sinclair 1000 |
| 45-Player Computer Game Up In Miami | American Software Technology is testing an interactive, multi-user, real-time game where you interact with other players as well as the computer. | |
| 49 Explosive Games for the ZX81 | Review of the book by Tim Hartnell. | Sinclair ZX81, Timex/Sinclair 1000 |
| 4K Programs on 8K ROM | 8K ROM won’t load 4K tapes. | Sinclair ZX80 |
| 4K RAM Units Available Soon | Static Memory Systems will sell 4K RAM packs for ZX80s and MicroAces. | MicroAce, Sinclair ZX80 |
| 4K ROM Listing – Initialization | Computer initialization routine in 4K ROM. | Sinclair ZX80 |
| 4K ROM: Display Routine | DISPLAY begins the 4K ROM’s input/output module at 013Ch, or 316d. | Sinclair ZX80 |
| 4K/1K Blackjack | In this 4K/1K ZX80 version of 21 you play one-on-one against the computer-dealer. It deals you two cards face up. To take another card, hit NL; to hold, press SPACE NL. The ZX80 then plays out its hand and shows if you win or lose. | Sinclair ZX80, Type-in program |
| 4K/8K ROM Switch | Review of the ROM switch kit from Marex Electronics. | Sinclair ZX80 |
| 64 Column Type | This program allows you to type a full screen (24 lines by 64 characters) on your TS2068. It’s primarily in BASIC, so it runs rather slow and will not keep up with most typists. | Timex/Sinclair 2068, Type-in program |
| 64K RAM Available Mid-March | Sinclair ZX81 | |
| 6K RAM Addition | Frustrated by the limitations of 2K RAM, Jim Graham of Oakham, MA, put 6K “under the hood” of his ZX81. He finds it a comfortable compromise, freeing up the edge connector for I/O use. The wirewrapped module consists of four sockets welded together, needs no board modifications and plugs into the existing RAM socket. | Sinclair ZX81 |
| 8K Flashing Prompts Subroutine | Short subroutine for producing flashing prompts on the ZX81 screen without causing screen flicker. Includes full program listing. | Timex/Sinclair 1000, Type-in program |
| 8K MC Video Invert Routine | Machine code program can almost instantly change everything on the screen to inverse video. | Timex/Sinclair 1000, Type-in program |
| 8K Memory PEEK | This slow but simple program peeks memory 100 bytes at a time. It displays consecutive bytes in 5 columns by 20 rows. Designed for the ZX81, it works with 16K RAM. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| 8K ROM Changes | Revisions to previous programs for 8K ROM. | Sinclair ZX80 |
| 8K ROM Monitor Routines | Continuation of article from prior issue examining the 8K ROM. | Sinclair ZX81 |
| 8K ROM Printer Commands | LLIST — Lists to printer instead of screen, LPRINT — Directs output to printer instead of screen, COPY — Outputs screen display to printer. | Sinclair ZX80 |
| 8K ROM Programs Here! | Our technical staff has the only prototype 8K ROM in the U.S. and we’re wording on programs so you will be able to use your new ROM immediately. We’re especially impressed by the graphics capability and the PLOT-DRAW-PRINT sequence. | Sinclair ZX80 |
| 8K ROM Update | Sinclair now has another source of 8K ROMs. According to Nigel Searle, the new manufacturer will deliver by September 1 enough ROMs to both replace bad ROMs and satisfy demand for new ones. | Sinclair ZX80 |
| 8K ROM, 16K RAM Updates | 8K ROMs will arrive in late February. RAMs, no firm date. | |
| 8K ROMCALLS | Program scans the ROM up to 7679, building a stack of CALLED and CALLING addresses. Then it sorts and displays them. | Timex/Sinclair 1000, Type-in program |
| 8K ROMS, New Machine from MicroAce | MicroAce will sell 8K ROMs for MicroAce and ZX80 computers within 8 weeks, according to Chris Cary, head of Compshop, Ltd. The ROMs are identical to Sinclair’s and are licensed by them. By August MicroAce expects to ship their new MicroAce II. Also in kit form, the MicroAce II will have 16K RAM, 8K ROM, […] | MicroAce |
| 8K Syntactic Sum | Modified version for 8K ROM. | Sinclair ZX80, Type-in program |
| 8K/16K Owners | Zeta Software of Greenville, SC, now offers 8K/16K program cassettes. Their latest catalog lists a flicker-free scifi adventure and statistical math packages. | Sinclair ZX81 |
| 8K/1K Slot Machine | Another free sample software review—a program directly from New England Software’s tape. | Sinclair ZX80, Type-in program |
| A Night in Las Vegas | Review of the cassette from Lamo-Lem. | Sinclair ZX80 |
| A Package From England, or, How I got a real ZX Printer | Details on ordering a printer from WH Smith and adapting for US use. | |
| A Practical Guide to Machine Language Programming on the Timex/Sinclair | Using only 16 chapters and 8 appendices, the author takes you on a guided tour of the Z80 in Sinclair country, distinguishing the CPU properties from the system behavior with clarity and flair. Your tour guide is an expert whose practical experience includes writing the word processor “WORD*” on which this book is written. Appendix […] | Sinclair ZX81, Timex/Sinclair 1000, Timex/Sinclair 2068 |
| A Report on the Spectrum | The Spectrum is a ZX81 that has been developed by adding a hi-resolution display, color board, improved cassette interface and larger keyboard. | Sinclair ZX Spectrum |
| A Sojourn at Compuserve | Overview of Compuserve and its services. | |
| A Tool to Help Debug Programs | To determine what occurs during a loop portion of a malfuntioning program, use a PRINT statement called a flag. | Sinclair ZX80, Sinclair ZX81 |
| Accounts | ACCOUNTS, an accounting program for small businesses, computerizes your DOME monthly accounting book. | Timex/Sinclair 1000, Type-in program |
| ACZ General Ledger | ACZ General Ledger, a very reliable double entry bookkeeping and accounting system, caters to small business needs. | Timex/Sinclair 1000 |
| Add Store & Recall to BASIC | STORE transfers a screen image (display file) above RAMTOP to be re-displayed by the RECALL command. | Timex/Sinclair 1000, Type-in program |
| Adding a Joystick to Your ZX81 | Wire a joystick to map to the arrow keys. | Sinclair ZX81, Timex/Sinclair 1000 |
| Addition Through 7 Digits | Add 7 digit numbers as long as the total doesn’t exceed 7 digits. | Sinclair ZX80, Type-in program |
| Address and Phone Book | This 4k program stores ASCII as codes into an array, getting areund the 4K BASIC’s lack of string arrays. It stores and prints names and addresses one at a time. This program runs in a 2K machine; for 1K RAM reduce DIM A. | Sinclair ZX80, Type-in program |
| Addressing: A Brief Tutorial | If you find ROM, RAM & PORT addressing and decoding confusing, here’s some explanation of what’s what. | Timex/Sinclair 1000, Type-in program |
| Adventure A | Adventure is not for impatient or unimaginative players. It has no bombs, no graphics, and no split-second decisions. It is an intellectual game requiring thought rather than reflexes. | Sinclair ZX81 |
| AERCO FD-ZX Floppy Disk | AERCO’s disk system consists of three major components: interface board, disk drive and power supply. | Timex/Sinclair 1000 |
| AI Application to be Implemented in QL | Sinclair Research just announced a medical advisor package now being written for the QL. | Sinclair QL |
| All-Purpose Beeper | Circuit to emit a “beep” every time your ZX80 or MicroAce reads from or writes to a selected memory address. | Sinclair ZX80 |
| Alphacom to Sell ZX/TS Printers Direct | Alphacom sells VP-42 printer. | |
| An Introduction to VU-CALC Spreadsheeting for the Timex/Sinclair 1000 and the Sinclair ZX81 | Review of the book. | Sinclair ZX81, Timex/Sinclair 1000 |
| Analog-Digital Converter | Use with the BB-1 I/O board. Converts at 2.5v and 5v to 8 bit values (0-255). | Sinclair ZX81 |
| Analogies, Logical Reasoning | Analogies and Logical Reasoning, two separate programs, pleasantly teach important concepts in logical thought. | Timex/Sinclair 1000 |
| Annotated 4K ROM Listing | The 4K ROM SAVE routine listing, including the original designer’s notes. | Sinclair ZX80 |
| Annotated 4K ROM Listing – Systems Variables | Listing tells you the values of all major variables used in the 4K ROM. | Sinclair ZX80 |
| Annotated 4K ROM: LOAD Routine | Assembly for the 4K ROM’s LOAD routine. LOAD begins in ROM location 0206H, or 518d. | Sinclair ZX80 |
| Annuity | Program calculates the payments needed to pay off a loan or how many years it takes to pay off a loan at a fixed payment. | Sinclair ZX81, Type-in program |
| Another $100 Misunderstanding | Tips for constructing the ZX81 kit. | Sinclair ZX81 |
| Another $100 Misunderstanding | Documents assembly errors in the ZX81 kit: missing instructions for capacitors C13/C14, inductors I1/I2, vertical installation of resistors R27/R29, and grounding strip, with detailed correction instructions. | Sinclair ZX81 |
| Another Look at 450ns EPROMS vs the ZX81/TS1000 | Paul Hunter’s comments on using 450ns EPROMs on ZX/TS computers (May83) strike me as true but incomplete. Paul shows how to add a flip-flop to delay the computer by inserting wait states and thus make the computer read slow EPROMS. You can use another chip select scheme to cure access problems without adding circuitry or […] | Sinclair ZX81, Timex/Sinclair 1000 |
| Archer | Test your archery skills and learn some fundamental physics at the same time. ARCHER simulates the effects of gravity, angle and velocity on bow-and-arrow trajectory. | Timex/Sinclair 1000, Type-in program |
| ASCII Program for ZX/TS Computer | CAI just announced an ASCII program to let the ZX/TS computers equipped with CAI/O boards operate as a standard ASCII CRT terminal. | Timex/Sinclair 1000 |
| Asteroids | Machine language game: avoid the asteroids. | Timex/Sinclair 1000, Type-in program |
| Attention TS1000 Owners | All information about ZX81s in SYNTAX also refers to Timex-Sinclair 1000s. | Timex/Sinclair 1000 |
| Authorized Sinclair Repair Services | MicroSync will take over Sinclair’s repair work for ZX80s and ZX81s. | |
| Authorized Software | Image Computer Products of Northbrook, IL, is the authorized ZX80 software producer. | Sinclair ZX80 |
| Automatic Recorder Control | Call the LOAD routine directly. | Sinclair ZX80 |
| Awari | Awari is an ancient African game for two players. Six piles of three stones each are arranged in front of opposing players, with each player’s “home” to the right of the piles. The play consists of taking all the stones in one of the player’s piles and, moving counterclockwise, dropping one stone in each pile […] | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Banner Writer | Use the TS2040 to print banners. | Timex/Sinclair 1000, Type-in program |
| Bar Chart | Bar Chart uses the 8K PLOT function to simplify the bar chart algorithm. It assumes B(15) has been filled, or partially filled, with values between 0 and 2000. | Sinclair ZX81, Type-in program |
| Bar Graphics | This program, written for a 2K MicroAce, draws bar charts on a white background with dark defined lines and a graphpaper-like effect behind the bars. It will choose 10 (0 to 10) random numbers to graph, or you can select them. | MicroAce, Sinclair ZX80, Type-in program |
| Basic Computer Programs for Business, Vol. 1 | While visiting a favorite book store, I discovered a treasure chest of jewels suitable to adorn the ZX80/81. This book offers “over 35 programs covering budgets, depreciation, cash flow, property comparisons, accounts payable, order entry, warehouse locations, inventory turnover analysis, job routing, resource allocation, production scheduling,” just to name a few listed on the cover. | Sinclair ZX81 |
| BASIC NL Seeks More Money | In V.l, No.4, the publishers of this Timex-Sinclair related newsletter announced their interest in “an interested party (to) merge resources for the purpose of continued growth.” | |
| Basic Salary Scheduling | Calculate salaries that increment on a straight-line basis. | Sinclair ZX80, Type-in program |
| BASICare Offers ZX81 Megabyte Memory Decoding | BASICare of London introduced their Organic Micro system for ZX81s. | Sinclair ZX81, Timex/Sinclair 1000 |
| Battery Pack Case | Battery pack adaptable to the ZX80. | |
| BB-1 8-Bit Input/Output Module Kit | Two Intel 8212 8-bit I/O port chips are the heart of the BB-1. Byte-Back’s module is compatible with both ZX and Timex units and neatly uses memory locations 32764 and 32766 to store input and output information. | Timex/Sinclair 1000 |
| Beginner’s Basic — INKEY$ Function | The INKEY$ function, though more obscure than commands like SAVE and RUN, is simple to use and adds a nice touch to your programs. | Sinclair ZX80, Sinclair ZX81 |
| Beginner’s Column – Error Codes and Debugging Programs | One of the ZX80/MicroAce’s nicest features keeps you from entering lines with syntactic errors into a program. | Sinclair ZX80 |
| Beginner’s Loading ML Programs | Learn how to put machine language (ML) programs into your computer. | Sinclair ZX80 |
| Beginner’s ROM and RAM Addresses | ROM and RAM addresses in 4K ROM, 1K RAM machines. | Sinclair ZX80 |
| Beginners – Analyzing the Problem | The first step in solving a problem with a computer is analyzing how you would solve it without one. | Sinclair ZX80, Sinclair ZX81 |
| Beginners: User-Friendly Programs | Some easy programming methods to write user-friendly programs for either 4K or 8K ROM programs. | Sinclair ZX80, Sinclair ZX81 |
| Beginners’ BASIC: More on INKEYS | Tutorial on using INKEY$ in 8K ZX81 BASIC programs, covering two techniques: stopping execution if any key is pressed (using PAUSE and IF INKEY$<>” pattern) and stopping execution until a key is pressed. Explains the null-string comparison and demonstrates keyboard-controlled reset and stopping logic. | Timex/Sinclair 1000 |
| Beginners’ Column: REM Revisited | Storing machine code in REM statements. | Sinclair ZX80, Sinclair ZX81 |
| Beginners’ Computing Magazine | OnComputing changes its name to Popular Computing. | |
| Beginners’ Dimensioned Arrays | Although BASIC uses simple English commands, the DIM statement is one of those that takes a little explanation. | Sinclair ZX80, Sinclair ZX81 |
| Beginners’ ML — Register to Register | Examines the loading, adding and subtracting instructions. Number 5 in series. | Sinclair ZX80, Sinclair ZX81 |
| Beginning Programming: ZX81 Math | Article expands on bits, bytes and binary numbers over the ZX81 and TS1000 manual. | Sinclair ZX81, Timex/Sinclair 1000 |
| Beginning Programs — For-Next Loops | For-next loops consist of 2 control statements, FOR.. TO and NEXT. These allow you to tell the computer to do a maximum number of steps in a minimum number of commands when you need the same calculation carried out several times with different variables. | Sinclair ZX80 |
| Better Scrolling | Techniques to improve scrollig. | Timex/Sinclair 1000, Type-in program |
| Big Character Program | Make your video characters 8 times bigger using ROM character images and substituting graphic symbols for dots. | Sinclair ZX80, Type-in program |
| Binary Addition and Subtraction | The point to learning how to add and subtract binary numbers is to see how “carries” are generated and what happens to those extra digits. | |
| Binary Representation | Knowing how to manipulate individual bits in your ZX80 is essential for efficient Machine Code programmming, so knowing what bits and bytes are is essential also. | Sinclair ZX80 |
| Bingo Card Generator | Short program to generate bingo cards. | Timex/Sinclair 1000, Type-in program |
| Bingo Number Generator | Generates numbers with their preceding letters and prints them at 8x their normal size at the top of the screen. | Sinclair ZX80, Type-in program |
| Biorhythms | I wrote this program as a result of a great disappointment I experienced after purchasing a Biorhythms program from one of the prominent software companies. The program did not print an accurate set of curves, and did not print a mathematically correct result. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Blast | Combine Star Hunter and Blast Effects into a new game. | Timex/Sinclair 1000, Type-in program |
| 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 |
| Book Review: Machine Language Programming Made Simple | Review of the Melbourne House book on machine language programming for the ZX80/ZX81. Positive assessment of background and writing style; critical of the lack of immediately practical applications. Book available from Gladstone Electronics. | Sinclair ZX80, Timex/Sinclair 1000 |
| Bookworm | This program will help you manage your book, comic book, or phonograph record collection. See the article for special LOAD/RUN instructions. | Timex/Sinclair 2068, Downloadable, Type-in program |
| Boolean Demonstration | Program demonstrates boolean logic. | Timex/Sinclair 1000, Type-in program |
| Breakeven Analysis | This program requires only a single video format for all control data input with an option to erase and re-enter data. This option occurs just before computation, which doesn’t begin until you approve data entries. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Bubble Sort Routine | Sorts numbers into ascending order. | Sinclair ZX80, Type-in program |
| Build Additional RAM | How to upgrade the ZX80 to 8K RAM. | Sinclair ZX80 |
| Buying By Mail: Know Your Rights | Federal Trade Commission rules give you some rights when you order by mail. | |
| Byte-Back M-64 Memory Expansion | Review of the RAM pack. | Timex/Sinclair 1000 |
| Byte-Back Modem Shipments Delayed | Byte-Back will ship no modems for 4-6 weeks. | |
| Byteing Deeper Into Your Timex/Sinclair 1000 | Review of the book by Mark Harrison. | Timex/Sinclair 1000 |
| Bytesavers Hint | If you are using a PRINT after a line number simply to add an empty line, use two commas instead. | Sinclair ZX80, Sinclair ZX81, Type-in program |
| CAI Instrument’s Widget Board | Most of us are pretty tired of waiting up to a year for delivery and then getting equipment and manuals with obvious mistakes. Couple that with an unresponsive manufacturer and you get frustrated customers. Because of problems detailed below, SYNTAX recommends that you delay purchasing the Widget until CAI Instruments offers correct, complete, and consistent […] | Sinclair ZX80 |
| CAI Offers Computer Network Package | CAI now offers a network package including Lexicon 11 modem, ASCII modem and cable. | |
| CAI Peripherals Update | CAI Instruments will ship their first Widgets the week of Sept. 21. | |
| CAI Printer Update | CAI Instruments will offer software components to make their Widget printer compatible with both 4K and 8K ROMs. | Sinclair ZX80, Sinclair ZX81 |
| CAI Ships Widgets | At press time, CAI’s Bob Swann confirmed reader reports- 100’s of Widgets shipped. Expect printers in 2 wks, tape drives in 4. Widgets chew up the top 4K of memory – 2 for tape and 2 for printer. | MicroAce |
| CAI Update | CAI Instruments is almost ready with their Widget series peripherals for ZX80s and MicroAces. | |
| Cantilever Beam Calculation | This program calculates the deflection of a cantilevered beam loaded to maximum safe load at the free end. | Timex/Sinclair 1000, Type-in program |
| Cardioid Plot | Plots a heart-shaped curve. | Sinclair ZX81, Type-in program |
| Cash Register | Lets your ZX/TS act like a cash register record keeper for a small retail store. | Timex/Sinclair 1000, Type-in program |
| Cassette Eavesdropper | Use this simple circuit to listen to your programs as they save and load or to search for programs on tape without pulling the earphone cord and adjusting the volume control each time. | Sinclair ZX80 |
| Cassette Label Maker | Design a three-line label on the screen with all characters available, then just hit “C” to copy as many labels as needed on the printer. | Timex/Sinclair 1000, Type-in program |
| Centronics Printer I/F | This interface plugs into the back of the TS2068 and provides a cable with a standard Centronics parallel printer connector. | Timex/Sinclair 2068 |
| Changes Ahead for Syncware News | Fred Nachbaur’s publication will continue on to volume 2, but shift locations, upgrade its format, take on additional personnel, publish quarterly instead of bi-monthly, and keep its editorial policies. | |
| Changes to Amazing Active Display | John Sampson of College Point, NY, called in response to the letter in the Oct. 81 issue about The Amazing Active Display. | Sinclair ZX80 |
| Changes to September Budget Program | User interface changes to the program. | Sinclair ZX80, Type-in program |
| Changes to Super ZX80 Invasion | Add new levels of difficulty. | Sinclair ZX80, Type-in program |
| Character Set Rotation | This machine code routine allows you to rotate the character set in any of four directions, with or without mirror imaging it. | Timex/Sinclair 2068, Type-in program |
| Chart Your Biorhythms | Program for 8K ROM machines graphically displays your emotional, intellectual and physical cycles. | Sinclair ZX80, Type-in program |
| Chase | Avoid the snake by moving tokens with 4 cursor control keys. Chase ends and prints your score when the snake catches you or you accumulate 100 points. | Timex/Sinclair 1000, Type-in program |
| Cheap Power | Surplus power supplies can double a ZX/TS’s load capabilities. | Timex/Sinclair 1000 |
| Check Your Voltage | Check cassette voltage level if you experience problems loading. | MicroAce |
| Check-B | Review of a menu-driven checkbook balancing program. | Timex/Sinclair 2068 |
| Checkers for Two | Play this game just like board checkers. | Timex/Sinclair 1000, Type-in program |
| Chest of Classics by Lamo-Lem | Review of the programs from Lamo-Lem. | Sinclair ZX80 |
| Clarification | Winky Board manufacturer Gerry Russell says the SAVE filter feature should be used only if high frequency RAM pack noise prevents SAVEing. | Timex/Sinclair 1000 |
| Clarification of Bytes Remaining | Ian Logan’s 8K Bytes Remaining program, Dec. 81, uses function keywords for all input except E, the numbers, and the punctuation. Thus after 1 REM type the letter E, the numeral 0, the function RND, the function LN, the function arcosine, a colon, and so on. The only space you type in is 1 after […] | Sinclair ZX81 |
| Color Plot | Use this program for drawing lines or circles anywhere on the screen. If you use a joystick, you can move, change color, and draw circles all at once. | Timex/Sinclair 2068, Type-in program |
| Color TS2000, 16K TS1500, Modem This Summer | Timex reports it will begin sales this August of TS2000s with 16K or 48K RAM, color/sound capabilities and bank-switching. The 16K version will sell for $149.95; the 48K for $199.95, says Timex. Both versions contain 24K ROM, including 8K ROM for cartridge capabilities and bank-switching. With bank-switching the computer can potentially use up to 256 […] | Timex/Sinclair 1500, Timex/Sinclair 2000, Timex/Sinclair 2068 |
| Colorsort | Basic and machine language programs to demonstrate sorting speeds. | Timex/Sinclair 2068, Downloadable, Type-in program |
| Comparative ROM Atlas: From ZX Spectrum to 2068 | To convert SPECTRUM software to the 2068, you need the location and function of ROM routines in each. You can buy the annotated ROM disassembly from Melbourne House or Zebra Systems. Timex sells the 2068 technical manual. Our cross-index links the two ROMs. | Sinclair ZX Spectrum, Timex/Sinclair 2068 |
| Comparison Between The Sinclair ZX80 and The TRS-80 Color Computer | Table comparing the various hardware and programming language features. | Sinclair ZX80 |
| Comparison Between the Sinclair ZX80 and the TRS-80 Pocket Computer | Sinclair ZX80 | |
| Compatibility of Machines | Compatibility of hardware with the TS1500 and TS2068. | Timex/Sinclair 1000, Timex/Sinclair 1500, Timex/Sinclair 2068 |
| Compu-Calendar | This three-part program returns correct day name, changes Gregorian dates to corresponding Julian day numbers, and computes total days between any two dates from Jan. 1 AD to Feb. 2300. To use, type the month number (NL) , day number (NL) , and fourdigit year (NL) . ZX80 returns the correct day name, followed by […] | Sinclair ZX80, Type-in program |
| Computer Keyboards Professional Keyboard Kit and Enclosure for ZX81 | Review of Gladstone’s keyboard and enclosure. | Sinclair ZX81, Timex/Sinclair 1000 |
| Computer Models | Programming tutorial on calculating buinsess models wide variety of cases. | Sinclair ZX80, Type-in program |
| Computer Number Systems | Introduction to binary with programs to convert from decimal to binary and binary to decimal. | Sinclair ZX80, Type-in program |
| Computer Number Systems II | Examines hexadecimal system. | Sinclair ZX80, Type-in program |
| Computer Number Systems III | Article looks at octal numbers. | Sinclair ZX80, Type-in program |
| Computers and the Aged | Activities, Adaptation & Aging will publish “computer technology & the aged: implications & applications for activity programs.” | |
| Computers for Kids — Sinclair ZX81 Edition | Review of the Creative Computing Press book. | Sinclair ZX81, Timex/Sinclair 1000 |
| Concatenating Machine Code | How to combine two machine language routines for use in a single program. | Timex/Sinclair 1000, Type-in program |
| Continuous Display Utility | Want a flicker-free screen? JRS Software now offers software for continuous display. | Sinclair ZX80 |
| Converting Decimals to Floating Point Binary | Explains how positive integers are converted to Sinclair’s internal floating point. | Timex/Sinclair 1000 |
| Copy Katt | Review of software copying program. | Timex/Sinclair 1000 |
| Cosine Functions on 4K ROM | ||
| Crash Course in Microcomputers | Review of the book by Louis Frenzel. | |
| Crunchers — 21 Simple Games for the Timex/Sinclair 1000 | New Timex Sinclair owners will find the games fun and original and also acquire programming skills while working through Crunchers. | Timex/Sinclair 1000 |
| Crypto | This sophisticated coder and decoder runs in only 2K. Use it for fun as a stand-alone program, or create a subroutine to make your datafiles unintelligible without the keyword. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Cryptoquote — Use Your ZX80 to Help You Solve Substitution Ciphers | “Cryptoquote” is a program for infinitely patient or just masochistic puzzle-solvers. It works just like cryptoquotes in newspapers — you substitute letters for letters to decode the babble into a quotation. Your ZX80 will help you, though, by displaying the frequency distribution of letters in your quotation. | Sinclair ZX80, Type-in program |
| Curing 16K RAM Random Dumping | Suggestions for eliminating RAM pack wobble. | Sinclair ZX81 |
| Curing 16K RAM Random Dumping | Practical guide to fixing intermittent memory loss in the Sinclair 16K RAM pack, covering insulator trimming, grounding spring inspection, and capacitor tape insulation, with a step-by-step procedure. | Timex/Sinclair 1000 |
| D-B-H Conversion | Convert decimal, binary and hexadecimal numbers easily with this well prompted utility. | Timex/Sinclair 1000, Type-in program |
| Data Dubber | The Peripheral People offer a device to help you LOAD and SAVE cleanly. | Sinclair ZX80 |
| Data File Format | Here’s a program for 2K MicroAces that allows you to create indexed files on tape. | MicroAce, Sinclair ZX80, Type-in program |
| Datasave – Files Without Programs | DATASAVE allows you to save a selected portion of memory to tape and then load it back again to any part of memory. Loading code with DATASAVE does not (of necessity) write over the program that you are running, so a program can load data from tape, manipulate it, and then save it back to […] | Timex/Sinclair 1000, Type-in program |
| Dear Editor | Letters with improvements programs; corrections; math error in 8K ROM; converting 4K ROM programs to 8K ROM; ZX80 users online. | |
| Dear Editor | Letters about new 8K ROM features; keyboard problems; video blanking; building additional RAM; interfacing to real world; improvements to bar graphics program; printing statements. | MicroAce |
| Dear Editor | Letters about adapting the ZX80 to work worldwide; beginner questions about programming; request for 8K ROM listing; recorders. | Sinclair ZX80 |
| Dear Editor | Letters about interference; saving bytes; additional RAM; static electricity; MicroAce issues. | MicroAce |
| Dear Editor | Letters about Syntactic Sum; contact info for vendors; schematics; source of 8K ROMs. | |
| Dear Editor | Letters about issues assembling MicroAce; tv/cassette player placement; adapting programs; reverse video; cassette eavesdropper; amateur radio operators. | MicroAce |
| Dear Editor | Question about back switching on the 2068; Firstloader problems; dedicated supporters. | Timex/Sinclair 2068 |
| Dear Editor | Everyone knows that Sinclair Timex computers are dead now that Timex quit, right? Well, I’m always the last to get the word, darn it! In May, I completed my “Super JO1000”, a TS1000 upgraded to full color, 124K system with EPROM programming, EPROM read, and Centronics parallel printer interface. (“JO” stands for John Oliger, who […] | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Dear Editor | Comments on Timex leaving market; question about 64 column mode; thermal paper for the 2040; questions about various programs. | Timex/Sinclair 2068 |
| Dear Editor | Comments about Timex leaving market; request for documentation/manuals. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Dear Editor | TS2068 version of Dave Wood’s High Line Numbers; maintaining the ZX81; questions about TS2040, TS2068 and TS1500. | Sinclair ZX81, Timex/Sinclair 1500, Timex/Sinclair 2068, Type-in program |
| Dear Editor | Letters asking about Canadian suppliers; problems entering programs; interference on TVs; tape recorders. | |
| Dear Editor | Letters about inverting video signal; TAB subroutine; contacting other owners; machine language programming. | |
| Dear Editor | Problems with vendors; VU-CALC with larger memory units; expanding memory space; memory problems with a 2040 printer; monitor problems with 2068. | Sinclair ZX81, Timex/Sinclair 2068 |
| Dear Editor | Complaints over proposed magazine price increase; altering Westridge modem software; retain memory contents after crash; bugs in JRC assembler/compiler. InfoWorld’s news page carried a report about TimeStar and the Timex Sinclair Computer. Synchro-Sette carried a similar article in March. Your publication was quick to denounce such reports as unfounded rumor, and even to assert that […] | |
| Dear Editor | Query for business software; how are programs locked; custom keycaps. | |
| Dear Editor | Battery-backed power; errors in printing floating point numbers; using VU-File with Qsave; Sinclair microdrive; overload the TS1000 stack with a simple program; good service from a vendor; thanks to fellow reader; Byte-Back RAM unit. | |
| Dear Editor | HP 82954A thermal paper works with 2040; explain Syntactic Sum; transistor cross-reference; relocatable HOT Z from Sinware; DIY resolutions to various problems. | |
| Dear Editor | Custom keytops are available from MULE Electronics; high pitched whine from TV; beware of overvoltage conditions; use Atari 822 paper on TS2040; Memotech printers; Paul Hunter offers excellent service. | |
| Dear Editor | Problem with ZX printer listings in hot months; repair keyboard connection; using CAI devices with 64K RAM; solving loading problems; ZX81 ROM bugs. | |
| Dear Editor | Cleaning the ZX printer; secure the slot key in expansion devices; printing problems with joystick; avoid power supply related crashes; test tape head alignment. | Timex/Sinclair 1000, Type-in program |
| Dear Editor | User with ataxia seeks help; comments on Programmers Toolkit from Softsync; replacement transistors; repair traces on keyboard; technical information for 2068; problems loading. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Dear Editor | Letters about 2068; memory packs for 1000; keyboard problems; temperature problems. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Dear Editor | Problems with computers, printers, software; replacement keyboard. | Timex/Sinclair 1000 |
| Dear Editor | Letters about magazine index; resistor values; ordering from England; errors in books; TV interference; bad connections; memory problems; replacement parts. | |
| Dear Editor | Letters about 4K ROM; tape recorders; modifying the ZX80 cursor; TV interference. | |
| Dear Editor | Letters about languages other than BASIC; Syntactic Sum; stereo cassette players; MicroAce kit; hardware changes voiding warranty; constructing characters that are smaller. | MicroAce |
| Dear Editor | Using Firstloader; response to review of HOT Z-2068; information about Timex Sinclair User. | |
| Dear Editor | Cassette recorders; speed with 16K; jumping to program lines quickly; handling negative numbers; wirewrap edge connectors; replacing cassette jacks; techniques for saving memory variable space. | Sinclair ZX81, Type-in program |
| Dear Editor | ZX-Microfair in London; Microace 8K ROM has bugs; Microace regulator; floating point in 8K ROM. | MicroAce, Sinclair ZX80, Sinclair ZX81 |
| Dear Editor | How to make a program unlistable; program for linear regression; painting heatsinks; FORTH; problems with 8K ROM/keyboard upgrade for ZX80; MicroAce flicker-free kit; large keyboard; edge connector cleaner. | MicroAce, Sinclair ZX80, Sinclair ZX81 |
| Dear Editor | MicroAce 8K ROM and flicker-free video upgrade board. ZX81 glitches. RAM pack wobble. | MicroAce, Sinclair ZX80 |
| Dear Editor | Sinclair discontinues tech support. Inventory control program sought. Connect full size keyboard to ZX81. Improving ZX80 cooling. | Sinclair ZX81, Timex/Sinclair 1000 |
| Dear Editor | Letters from readers including a STOP/listing trick via POKE (Andrew Lederman), a linear regression program offer and byte-saving tips (Paul Ezra), a heat sink painting debate (Chuck Hutton), interest in FORTH for ZX80/81 (Rich Holmes), 16K RAM mechanical fixes and keyboard project (Larry Lockwood), and keyboard project with speaker and switches (Russ Gagnon). | |
| Dear Editor | Letters column covering: best cassette recorder recommendations (Jose Cabrera); direct composite video connection to monitor using TS1000 output (Samuel Levine); request for group message to Sinclair about reliability failures (Donald Shank); heat sink modification with a custom aluminum piece (Blase Sanzone); keyboard purchase advice (Jonathon Hodges); PCB mounting fix for picture stability (Robert Adams); Syntactic […] | Sinclair ZX80, Timex/Sinclair 1000 |
| Dear Editor | Letters covering: FAST/SLOW mode switching in machine code monitors (Clark Calkins, answered by KO); expanding ZX81 on-board RAM to 2K using Fujitsu MB8416 static RAM (William Jordan); disabling SPACE-key interruption and CONT screen clearing (C. Alfred Spencer, answered by KO); explanation of Syntactic Sum meaning (Julian Goldman); Syntactic Sum FAST mode requirement and SAVE anomaly […] | MicroAce, Sinclair ZX80, Sinclair ZX81, Timex/Sinclair 1000 |
| Dear Editor | Letters about expanding the Sinclair; software available from Banta; 16K RAM pack; reverse video; Sinclair repair department; parts from Radio Shack. | |
| Dear Editor | Letters about power supply ripple; keyboard labels; crashing; jack connections; where to get parts; saving programs. | |
| Dear Editor | Letters about tv/cassette recorder placement; crashes; static electricity; merging programs; suggestions for manufacturers; using extended RAM; tape head alignment; vendor complaints. | |
| Dear Editor | Drop of epoxy on keyboard as placeholder; problems saving and loading; solution to poor connector contact; learning BASIC. | |
| Dear Editor | Questions about the Spectrum; entering functions; upgrading a MicroAce; sound from the ZX81; RST 28; merging programs; diodes. | |
| Dear Editor | Question about noise during save; keyboard replacement; COBOL for ZX/TS; saving; internal RAM; overheating; loose connector problems. | |
| Dear Editor | Semantics about baud vs bits per second; keyboard conversions; solving heat build-up; Timex modem compatibility with ZX80; renumbering program; conversion to ASCII; install RAM pack inside ZX81; interface Selectric typewriter. | |
| Dear Editor | Alternative to flat ribbon cable for keyboard connection; question about how terminal programs work; connect video monitor; user pleased with Touch-A-Matic; computer crashes at end of load. | |
| Dear Editor | Keyboard audio tone; full-sized keyboard from Double H Electronics; detecting two keys at once; communicating via tape with someone in England; damaging keyboard leads; curing interference; RAM pack wobble; user-defined graphics on the ZX/TS. | |
| Dear Sinclair Research | It is with great displeasure that I am returning my Sinclair ZX80. Response from Nigel Searle. | Sinclair ZX80 |
| DeathChase | Review of the game, originally for the Spectrum and converted to the 2068. | Timex/Sinclair 2068 |
| Decimal to Floating Point Library | Use built-in floating ROM routine to convert decimal number to floating point format. | Timex/Sinclair 1000, Type-in program |
| Decimal-Hexadecimal Conversion Program | Utility converts values in decimal (base 10) from 0-65535 to hexadecimal (base 16) equivalents. | Timex/Sinclair 1000, Type-in program |
| Defective 8K ROMs | Defective ROMs and notes about power converter in 16K RAM pack. | Sinclair ZX81 |
| Defective Laserscan RAM Replacement Available | Laserscan Electronics discovered that some of their early model 16K RAM packs, produced until mid-January 1983, are defective. | |
| Defensive Awari | Improvements to author’s program. | Sinclair ZX81, Type-in program |
| Defensive Awari | Improvements to a previously published Awari game program, adding defensive move logic by modifying lines 330-400. Provides specific line changes to make the computer opponent play more competitively. | Timex/Sinclair 1000, Type-in program |
| Defining Functions on the ZX/TS | You sit down to type in a non-Sinclair BASIC program into your ZX/TS only to find in the listing a FN(A) statement. Should you forget about the rest of the program? No. We’ll simulate a defining functions feature. This versatile approach is actually better than other micros’ function defining feature. | Timex/Sinclair 1000, Type-in program |
| Design | Run this flashy program on a TV as a personalized store window ad. | Timex/Sinclair 1000, Type-in program |
| Detecting Multiple Keys | Detecting multiple keys on the TS1000. | Timex/Sinclair 1000, Type-in program |
| 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 |
| Dice Roll Program — 8K/1-2K | Program that randomly generates two dice (1-6 each) and displays them in a visual dice format. Version 1 fits in 1K RAM; Version 2 produces more elegant graphics with additional memory. Dice display persists for ~16.5 seconds before automatic re-roll. | Timex/Sinclair 1000, Type-in program |
| Different Strokes | Prestodigitizer, an 8-bit input graphics tablet available for several micros, will soon be ready for your ZX80. | Sinclair ZX80 |
| Digital Clock | This program operates as a digital clock, showing A.M. or P.M. and changing at 12:00. | Sinclair ZX81, Type-in program |
| Digital Logic Probe | Construction guide for a logic probe using half of an LM-339 quad comparator, compatible with both CMOS and TTL logic levels. Two LEDs indicate high/low/pulse states. Parts cost under $10. Includes circuit description and probe tip construction tips. | |
| DIM as Calculator Sum-to-Memory | DIM arrays can function as a sum-to-memory system found in many calculators. More importantly, it acts as a counter function and can be used where FOR-NEXT loops will not work. Moving Billboard, this illustrates the counter function. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Direct Character Code Output | Print ASCII characters through Memotech and AERCO Centronics interfaces and bypass the translation routines. | Timex/Sinclair 1000, Type-in program |
| Direct Input Horizontal and Vertical Line Graphics | Lets you draw lines by direct input and loops so you can draw until you run out of memory. | Timex/Sinclair 1000, Type-in program |
| Disable Auto-List | This routine tricks Sinclair’s auto-list mechanism into malfunctioning so new program lines do not appear on the screen. | Timex/Sinclair 1000, Type-in program |
| Distance | Computes the shortest distance and true bearing from any point on the earth’s surface to any other location. | Timex/Sinclair 1000, Type-in program |
| Do or Die | You are trapped in a Mayan maze-like tomb. A block pixel in the central chamber is the only escape route. | Timex/Sinclair 1000, Type-in program |
| Draw A Picture Program | Draw circles, diagonals and straight lines easily with this drawing program. | Timex/Sinclair 1000, Type-in program |
| Drive to Run CP/M In the Works | Kopak Creations and Aerco are working jointly on a ZX/TS disk drive to run CP/M (world’s most common disk-based microcomputer operating system.) Aerco says the drive will be available in 3 months. | |
| Dueling Devices | Problems related to incomplete I/O address decoding. | Timex/Sinclair 1000 |
| E-Z Key 60 Keyboard | The keyboard is well designed, comfortable to use, is completely consistent with the style of ZX/TS computers and improves entry. | Timex/Sinclair 1000 |
| E-Z Loader Software Bug Fix | Repair E-Z Loader with a few pokes. | Timex/Sinclair 1000, Type-in program |
| Easier Loading for MC Utilities | Load or enter the program your MC program will work on. | Timex/Sinclair 1000, Type-in program |
| Easy Math | Easy Math essentially turns your system into a calculator, with formulae storing ability and a 26 item user stack. | Timex/Sinclair 1000 |
| Edge Connectors Available | Kopak Creations of New York now offers 46-pin edge connectors for ZX80/81s. | Sinclair ZX80, Sinclair ZX81 |
| Editing Hints for Print Lines | Technique for creating many lines with PRINT statements. | Timex/Sinclair 1000, Type-in program |
| Education Workshop Series Expanded | Technical Education Research Centers, Inc. workshops were designed for professional development for educators, emphasizing hands-on experience with micros including ZX/TS computers. | |
| Educational Software Vendor | Edson Electronics offers educational programs for ZX80/81. | Sinclair ZX80, Sinclair ZX81 |
| Egg Timer | This simple, practical software timer sets off an alarm to let you know when your egg boils, your game finishes or time’s up. | Timex/Sinclair 1000, Type-in program |
| Emulator Boards Available | Doug Dewey called to let us know that he’s making Spectrum Emulator Boards using 27128 chips. | Sinclair ZX Spectrum, Timex/Sinclair 2068 |
| Entrapment | This game pits you against your computer. | Sinclair ZX81, Type-in program |
| EPROMS: What they are, what they do | Description of the chips. | |
| Equational And/Or | Many users are confused about the logical use of AND and OR in the 8K ROM. Here is a touchstone (demonstration) program illustrates various uses of AND and OR. | Sinclair ZX80, Type-in program |
| Estimate Heating Costs | Use these 3 programs to estimate heating costs for houses and other small buildings. | Sinclair ZX80, Type-in program |
| Etching Program | Draws patterns by itself. It traces a continuous line, starting at the left-hand center edge of the screen, bouncing off the edges, and stopping only if the line leads into one corner. | Timex/Sinclair 1000, Type-in program |
| Examining Machine Code | Look at any address in memory, leave it alone or change its contents, and automatically go to the next address. | Timex/Sinclair 1000, Type-in program |
| Exchanging Registers, Part 6 | In addition to the eight registers A,F,B,C,D,E,H and L covered in an earlier article, the Z80 (central processing unit in your ZX80/81) has a twin set of alternate registers. | Sinclair ZX80, Sinclair ZX81 |
| Exclusive ZX/TS Exhibition | ||
| Excuse Me, That’s Sir Clive | Queen Elizabeth II of England knighted Clive Sinclair on June 11, honoring his accomplishments as inventor of the ZX/TS computer. | |
| Expanding Existing 16K Programs | If you upgraded to 48K RAM for your ZX81, you may think it simple to add a few program lines and enlarge the variable arrays in existing 16K RAM programs to utilize the increased memory capacity. | Sinclair ZX81, Type-in program |
| Experiments in Artificial Intelligence | Review of the book by John Krutch. | Timex/Sinclair 1000 |
| Extended ZX80 Service Contracts | Sinclair now offers extended service contracts to ZX80 owners. $25 per year will cover all parts and labor and return shipment of the unit. | Sinclair ZX80 |
| EZUG Newsletter | The Educational ZX80/1 Users’ Group (EZUG) publishes a newsletter each month for ZX80 users. | Sinclair ZX80, Sinclair ZX81 |
| Faster Pseudorandom Numbers | Sequentially PEEK from the 8K ROM’s machine language operating system (essentially a pseudorandom number table) from a randomly selected starting point to provide “random” numbers. | Timex/Sinclair 1000, Type-in program |
| Fifteen Puzzle | 8K ROM version of game published in earlier issue. | Timex/Sinclair 1000, Type-in program |
| Fifteen Puzzle — 4K/2K | Implementation of the classic 15-piece sliding puzzle game for the ZX80 in 4K ROM with 1K+ RAM. Checks for solvable starting combinations (not all 20 trillion are), prevents illegal moves, counts moves, and congratulates the player on winning. Includes complete BASIC listing. | Sinclair ZX80, Type-in program |
| Find Clean Tape on 8K | Quickly find the unused section of tape for SAVEing 8K programs on multi-program tapes on any RAM size. | Sinclair ZX81, Type-in program |
| Firstloader — From ZX/TS to 2068 | Syntax commissioned a custom program, written by David Ornstein, to convert your existing programs for the 2068 or 48K Spectrums. This program translates input bytes from ZX/TS tapes to an equal number of output bytes in your 2068 that you must edit, and then save. Codes & program control structures differ in the two designs, […] | Sinclair ZX81, Timex/Sinclair 1000, Timex/Sinclair 2068, Downloadable, Type-in program |
| Fix for Excessive Charger Ripple | Diagnoses and fixes a display distortion problem caused by excessive ripple on the +5V supply, typically from a degraded charger. Solution: replace the 22MFD/16V capacitor (C3) with a Nichicon 220MFD/16V (Radio Shack cat. 272-956). | Timex/Sinclair 1000 |
| Flashing Prompts Subroutine | Sinclair ZX81, Type-in program | |
| Flower Plot — 8K/1K | Mathematical graphics program using the ellipse formula with a sinusoidal radius to generate flower petal patterns. Supports named flower types by adjusting the N parameter (N=8 Mayan Daisy, N=99 Rose, N=456 Chrysanthemum, N=999 Surprise). Runs in 1K RAM. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Flying Bird | Short 8K BASIC routine demonstrating animated graphics: displays a flying bird (or bat if PAUSE statements removed) by alternating two character patterns. Speed controlled by PAUSE statement values. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| For Syntax Readers Only | Sinclair now offers used ZX80s for only $49.95. According to Nigel Searle of Sinclair, most of these machines were sold in England as kits and assembled incorrectly. | Sinclair ZX80 |
| Frequency Histogram | Program tests how random the ZX80/MicroAce’s random number generator really is. | MicroAce, Sinclair ZX80, Type-in program |
| Frogger | Frogger helps Timex step up to the big time arcade with fast action, good medium resolution graphics and a challenge tough to beat. | Timex/Sinclair 1000 |
| From Other Basics – VAL and LEN | ZX80 Basic substitutions for LEN and VAL functions. | Sinclair ZX80 |
| From Sinclair Research | Sinclair ZX80 and Syntax ZX80 announcement. | Sinclair ZX80 |
| Full Annotated 4K ROM Listing | Sinclair’s complete 4K ROM listing with original designer’s annotations will be available from SYNTAX by August. | Sinclair ZX80 |
| Future History: 2068 | Lights of the City updated for the 2068. | Timex/Sinclair 2068, Type-in program |
| G Russell Developing New ZX/TS Products | Bill Russell tells SYNTAX he’s creating some new products for ZX/TS machines as well as for the 2068. | Timex/Sinclair 2068 |
| Game Changer Interface | Clever hardware construction, both mechanical and electronic, and a solid comprehension of both 6502 (the Atari 2600 CPU) and Z80 programming combine to produce the very powerful "Game Changer Interface". | Timex/Sinclair 1000 |
| Games for Your Timex/Sinclair 2000 | Games published include very clean listings of working programs. I was struck by the originality of the games presented. Even those with the usual game plans have unique twists and amusing graphics. | Timex/Sinclair 2000, Timex/Sinclair 2068 |
| Get Your System Together | Build a enclosure for your computer to keep everything organized. | Timex/Sinclair 1000 |
| 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 |
| Gladstone Electronics Announces New Products | ZXFORTH, Fast Load program, Speech Pack. | Timex/Sinclair 1000 |
| Golf Partner | Stores your golf scores and calculates your average and handicap. The program holds information for 100 rounds of golf, and calculates the statistics after your first ten entries. | Timex/Sinclair 1000, Type-in program |
| Goodbye, SQ | SQ and SYNTAX staffers regretfully announce that SYNTAX QUARTERLY magazine has ceased publication, due to financial difficulties. | |
| Gradebook for Teachers | Program helps teachers average grades at the end of the grading period. | Sinclair ZX80, Type-in program |
| Grading Program | Program includes 37 student names—enough to satisfy most classroom situations. | Timex/Sinclair 1000, Type-in program |
| Grandson of Big Characters | Update of John Filley’s ‘Son of Big Characters’ program for 8K ROM and 1K RAM. Displays 2 lines of 16 large characters. Uses Boolean-free logic for 8K ROM compatibility (AND/OR no longer operate as bit manipulators in 8K ROM). Supports inverse video with a single line change. | Timex/Sinclair 1000, Type-in program |
| Graphic Pointer | Use this machine code routine to quickly specify the PLOT position on the 2068 screen. | Timex/Sinclair 2068, Type-in program |
| Graphics: A to Z | Review of the book by Paul Bingham and Rick Goulian. Starts with BASIC PRINT statement graphics and goes to machine code graphic subroutines. | Timex/Sinclair 1000 |
| Green and Black and Read All Over | Connecting the ZX81 to a monitor. | Timex/Sinclair 1000, Type-in program |
| Grimm’s Fairy Trails | Review of Timex’s response to PACMAN. The maze-pursuit game has 6 levels of play, from crawl to very fast. | Timex/Sinclair 1000 |
| Hall of the Fractal Hackers | Based on the Sep.84 Scientific American computer software issue, the first of these programs creates fractal patterns using the method described on page 156. | Timex/Sinclair 2068, Type-in program |
| Hangman | ZX80 version of the 2 person spelling game, Hangman. | Sinclair ZX80, Type-in program |
| Hardware Hint – TS2040 | Paper for the Radio Shack 40-column thermal printer works on the TS2040. Both are made by Alphacom. | |
| Hardware Hint – TS2068 | Wire a 9v power supply to the printer (do not connect to edge connector) to use the ZX Printer with the 2068. | Timex/Sinclair 2068 |
| Hardware Hint – ZX-99 | 10 ohm resistor may prevent internal relay from sticking closed. | Timex/Sinclair 1000 |
| Hardware Hints | Potential solution to overheating; labeling keys on big keyboards. | Sinclair ZX80 |
| Hardware Hints | Techniques for preventing overheating, memory loss. | Sinclair ZX81 |
| Hardware Hints | Two hardware tips: an overheating fix using a steel block on the case (reprinted from EZUG Newsletter Jan/Feb 82), and a fix for memory loss caused by defective solder joints on 7805 voltage regulator pins. | Sinclair ZX81, Timex/Sinclair 1000 |
| Hardware Notes | Advice on DIP headers; edge connectors; video monitors; reset switch; cassette monitoring. | Sinclair ZX80 |
| Hardware Preview: RD8100 System | RD8100 motherboards and modules are building blocks that plug onto your computer or together to create instant systems. | Sinclair ZX81 |
| Hardware Project | This circuit will simplify loading and saving programs by eliminating ground loop noise without the need to pull out the earphone plug during saving and the microphone plug during loading. | Timex/Sinclair 1000 |
| Hardware Project: Simple 4K-8K ROM Switch | Step-by-step guide for building a piggyback ROM switch to run both 4K integer BASIC and 8K ROMs in the ZX80 without swapping chips. Uses a single-pole switch mounted inside the ZX80 case, with both ROMs soldered together except at pin 24 (Vcc), which is switched to activate one ROM at a time. | Sinclair ZX80 |
| Hardware Report | Potential solution to problems with LOAD. | Sinclair ZX80 |
| Hardware Review: Buffered Buss/Development Board “Expansion Board” | Computer Continuum’s buffered expansion board kit is a buffered backplane, providing four 44-pin edge card connectors with the same pinout as Sinclair’s except the slot. | Timex/Sinclair 1000 |
| Hardware Review: Joystick Adaptor | Zebra’s plug-in joystick adaptor, a small module, lets you attach an Atari-style joystick to your ZX/TS. | Timex/Sinclair 1000 |
| Hardware Review: Marex ROM Switch | Review of a 4K/8K ROM switch for the ZX80 from Marex Electronics, Valley City OH. Available in kit or assembled versions at $24.95-$49.95. Covers assembly experience, problems found (static sensitivity, PC board short), and usage tips for switching between ROMs. | Sinclair ZX80 |
| Hardware Review: Quicksilva Hi-Res Graphics Controller | Review of the Quicksilva hi-res graphics board for the ZX81, providing 256×192 pixel resolution with 14 new BASIC commands. Requires at least 4K RAM. Uses the QS connector and motherboard. Drawback: hi-res and normal display modes cannot be combined. Standard ZX81 power supply insufficient. | Timex/Sinclair 1000 |
| Hardware Review: The Parrot, Voice Synthesis Module | The Parrot, produces 64 separate allophones. R.I.S.T. used Voicetech’s general purpose speech development kit combined with chips and software to produce a cost effective ZX/TS speech unit. | Timex/Sinclair 1000 |
| Hardware Tip: Keyboard Conversion | Use a DIP socket to create connectors for a keyboard conversion. | Timex/Sinclair 1000 |
| Headscan | Program to read and reveal the information from the 17-byte header of a program. | Timex/Sinclair 2068, Type-in program |
| Hidden REMs | Use this trick to hide information in your REM statements. | Timex/Sinclair 1000, Type-in program |
| High Line Numbers | Poke to create line numbers above 9999. | Timex/Sinclair 1000, Type-in program |
| Hog Heaven – ROM Entry Points | Complete list of global subroutine calls for the 4K ROM’s eigh software modules. | Sinclair ZX80 |
| Home Energy Analysis | Takes into account the effectiveness of both heating and cooling systems and other factors affecting energy usage in your home. | Timex/Sinclair 1000, Type-in program |
| HOT Z-2068 | Once again, Ray Kingsley has brought out one of the most powerful machine-code monitors I have ever seen. Everyone planning to write machine code routines on the 2068 owes it to himself to buy a copy of this package. This latest version of HOT Z includes disassembly and data displays, ROM floating-point code display, four […] | Timex/Sinclair 2068 |
| House Rules at the Last Chance | Comments about buying products in wake of Timex departure. | |
| Household Finances — 8K/16K | Personal finance program for tracking household income and expenses in up to 10 user-defined categories (8 expense, 2 income). Includes monthly and yearly summaries, a self-saving option, and protection against accidental erasure. Requires 8K ROM and 16K RAM, leaving ~12.6K for data. | Timex/Sinclair 1000, Type-in program |
| How Many Bytes to the Line? | Subroutine determines the exact number of bytes used for each line of program instruction as well as an entire program. | Sinclair ZX80, Type-in program |
| How to Buy a Timex Computer | “We do not have a primary plan to sell computers by mail. The 800-24-TIMEX number provides referrals to stores,” said Timex VP Dan Ross. | Timex/Sinclair 1500, Timex/Sinclair 2068 |
| How to Wire a Big Keyboard | Although the ZX80 has many fine features, some people complain about the small pads of the touch keyboard that comes with it. But this is not a serious problem. The ZX80 uses a matrixed keyboard, so you can easily add a bigger, parallel keyboard. | Sinclair ZX80 |
| Ian Logan Wins First Annual Rosetta Stone | ||
| IC Inventory | This program, written for the CD4000 series of ICs and using the 4K ZX80 ROM and at least 2K RAM, can be adapted for any series of things following consecutive numbers. | Sinclair ZX80, Sinclair ZX81, Type-in program |
| Improved 4K Sine Calculation | Use these lines in 4K programs requiring sines between 0 and 90 degrees. | Sinclair ZX80, Type-in program |
| Improved Data Input | Subroutine for improved data input using INKEYS, providing a blinking block cursor at the current screen position, RUBOUT support, and return of entered data in variable C$. Replaces the standard INPUT statement to allow data entry at arbitrary screen positions. | Timex/Sinclair 1000, Type-in program |
| Improving Display | One problem with creating graphic displays on the ZX80 is users’ inability to interact with display. This program allows you to manipulate a cursor on 14 screen lines and to insert characters where desired. | Sinclair ZX80, Type-in program |
| In and Out of Machine Language | When you use machine language programs, you have no keys to press directly. So we need to tell the machine to RUN a machine language program, and to tell it to STOP. | Sinclair ZX80, Sinclair ZX81 |
| Income Tax | Program to help prepare a tax return. | Timex/Sinclair 1000, Type-in program |
| Income Tax — 8K/16K | Full BASIC program for preparing a US income tax return (Form 1040 and Schedule A). Menu-driven with data entry, calculation, review, record, and erase functions. Requires 16K RAM. | Timex/Sinclair 1000, Type-in program |
| Increment, Decrement For-To’s | Use LET to increment or decrement loops in 4K BASIC. | Sinclair ZX80, Type-in program |
| Input Port | Capture data through a port, place it into a CPU register. | MicroAce, Sinclair ZX80 |
| Integer BASIC Compiler | If you have lots of experience programming in languages that don’t tell you about errors, JRC has a BASIC compiler that you may be able to use. | Timex/Sinclair 2068 |
| Interface to the Real World | Add an 8-bit latch to the ZX80 or MicroAce, mapped to 3000H (12288). Includes schematic. | MicroAce, Sinclair ZX80 |
| Intro to Machine Language | Start of series on machine language programming for beginners. | Sinclair ZX80 |
| Inventory | Program helps you keep track of household or business items. | Timex/Sinclair 1000, Type-in program |
| Inverse Big Characters | To print 8x size characters in reverse video, change these lines from Big Characters (Dec. 80). | Sinclair ZX80, Type-in program |
| Inverse Cryptology | Challenging code breaking game for 2 uses 4K ROM and 1K RAM. | Sinclair ZX80, Type-in program |
| Is Timestar a Dark Star | After months of very loud speculation, plenty of wishful thinking, and innumerable missed deadlines, where is the Timestar? What ever became of the Trinity Magnum Co? Well, Timex says they get the odd phone call, but no real proposal, no funds to bind a deal, nothing to regard seriously. In short, no negotiation. | |
| JK Audio Model JK-310 I/O Board with Real Time Clock | JK-310 is ideal for your applications and projects that require a real-time clock. JK-310 uses an OKI MSM5832 real-time clock chip. | Timex/Sinclair 1000 |
| K-Power to Fulfill TSU Subs | Subscribers to ECC’s ill-fated new venture into North America, Timex-Sinclair User, should have received postcards by now, offering K-Power to complete their subscriptions. | |
| Kaleidoscope | I resorted to machine code in an effort to write a fast program to display a kaleidoscope pattern on the ZX/TS screen. The resulting images may be viewed on the screen and printed out at will. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Key Support Operations Will Stay | Announcements of support from SoftSync, Byte-Back, Microsync Services, Thomas B. Woods, Banta Software, Kopak. Timex will honor warranties. | |
| Key-finder Card | Some things turn out more useful than you would at first think – this card is one of them. When I first got it, I stuck it on the 2068 test setup—what harm could it do? But I shift computers all day using the entire Sinclair family plus Osbornes and TRS-80’s. I save a few […] | Timex/Sinclair 2068 |
| Keyboard Beeper | Review of Burnett Electronics’ keyboard beeper. | Sinclair ZX80 |
| Keyboard Scanning | Tutorial on reading the TS1000/TS2068 keyboard directly. | Timex/Sinclair 1000, Timex/Sinclair 2068, Type-in program |
| Keyboard Scanning from Machine Code | Explains how to scan the ZX80/81 keyboard from machine code in SLOW mode using the LAST K system variable (16421-16422). Covers key-value demonstration, FAST/SLOW mode selection from machine code using ROM addresses, and presents a complete machine code keyboard scanning routine that mirrors Sinclair’s own BASIC keyboard feel. | Sinclair ZX80, Timex/Sinclair 1000 |
| Know Your Gas Hogs | Use your ZX80 to compare fuel economies and estimate total gas expenditures. | Sinclair ZX80, Type-in program |
| KOPAK Creations Opens Retail Store | Retail location was at 119 Peter St., Union City, NJ. | |
| KOPAK Introduces New Keyboard | Kopak Creations’ new keyboard, ready in 15 weeks, plugs into internal ZX/TS keyboard connector. | |
| Landing a LEM on the Moon | This ZX80 version sets a LEM 2,530 meters above the moon with only 300 liters of fuel. You must land without crashing or running out of fuel. | Sinclair ZX80, Type-in program |
| Late News | Laserscan wants to liquidate their limited 16K RAM kit. | |
| Learning Timex/Sinclair Basic | Review of the book by David Lien. | Timex/Sinclair 1000 |
| Letter From The Editor | ||
| Letter Recognition Train | Children learning to read must first master skills of letter recognition and discrimination. This simple program teaches that skill, with little help from adults | Timex/Sinclair 1000, Type-in program |
| LI Group Loads and Modifies TT | The Jun. 84 issue of L.I.S.T.ing, the monthly newsletter of the Long Island Sinclair Timex Group, contains full instructions for converting the Spectrum program Transylvanian Towers to operate on the 2068. | Sinclair ZX Spectrum, Timex/Sinclair 2068 |
| Life Expectancy | Program calculates your life expectancy based on data you input on habits and family history. | Timex/Sinclair 1000, Type-in program |
| Light Control Interface | Interface Technology will adapt “The Microcommander” to the Sinclair ZX80. | Sinclair ZX80 |
| Lights of the City | This program uses the 8K ROM’s graphics and animation capabilities to generate an ever-changing video pattern like a growing city. | Sinclair ZX80, Type-in program |
| Line Recharacterizing — 4K and 8K | Technique for replacing characters or keywords in a program without retyping, using FOR-PEEK-POKE loops to scan program memory and substitute character codes. Example replaces all AND keywords with OR, with separate versions for 4K and 8K ROM address spaces. | Sinclair ZX80, Timex/Sinclair 1000 |
| Line Renumbering | Two approaches to renumbering program lines, one in Basic, the other in machine code. | Sinclair ZX81, Type-in program |
| Line Renumbering | This program renumbers the line numbers in any other program in memory. | Sinclair ZX80, Type-in program |
| Lines | Program that produces a random display of fans of color. | Timex/Sinclair 2068, Type-in program |
| Linesum | Locating errors made in typing from printed listings is easy when they include a checksum for every statement, and you have Linesum loaded. | Timex/Sinclair 1000, Type-in program |
| LJH’s Keyboard | Ad says “wired keyboard hooks up in minutes,” but this project may take beginners 1-2 hours. | MicroAce, Sinclair ZX80 |
| Loading Hexadecimal Listings | This program converts the hex and stores it into a space explicitly for it. | Sinclair ZX81, Type-in program |
| Loading One ZX/TS from Another | Send programs from one computer to another directly by wire from the sender’s monitor driver to the receiver’s ear jack. | Timex/Sinclair 1000 |
| Loading Problems with ZX81 Kits | If you have loading problems with a kit ZX81, see if you cracked C10 during assembly. Some machines LOAD fine with 1 (or 2)K internal memory, but not with 16K. | Sinclair ZX81 |
| Loading Registers with Data (Part 4) | Fourth installment of the machine code programming series, covering Z80 load instructions: loading immediate data into registers (LD B,6), loading from memory via register pair (LD A,(HL)), and working with numbers greater than 255 using register pairs. Includes a worked example of adding 1000 and 450 in machine code. | Sinclair ZX80, Timex/Sinclair 1000 |
| Loading with Syntactic Sum | How to use the program. | Timex/Sinclair 1000, Type-in program |
| Loan Amortization Revisited | Sinclair ZX81, Type-in program | |
| Loan Amortization Schedule | Program gives you monthly payments and loan amortization information. | Sinclair ZX81, Type-in program |
| Logic Chip Failure Symptoms | Reader deduced that his ZX81 logic chip (ICl) had failed from the keyboard line and diode matrix. | Sinclair ZX81 |
| London Microfair Show Guides Available Again | Limited supply of show guides available. | |
| Look Angles | Program to calculate look angles (azimuth, elevation and heading) for satellite dish antennas. | Timex/Sinclair 2068, Type-in program |
| LPRINT Bug Bypass for TS2040 | Method to avoid the printing bug in the TS2040. | Type-in program |
| M-16 Memory Module | Review of the RAM pack. | 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 Graphics Demo | Program provides an unusual display of machine code (MC) graphics. It alters the I register, which contains the high order address of the graphics table. | Timex/Sinclair 1000, Type-in program |
| Machine Code Monitor | Utility program enables you to edit and execute hex Z80 machine code. | Sinclair ZX80, Type-in program |
| Machine Code Print Routine | Machine language (ML) permits you to print characters anywhere on the screen. Harness the ZX80’s own print routine with RST 0010. | Sinclair ZX80, Sinclair ZX81, Type-in program |
| Machine Code Programming – Multiplication and Division | Multiplication and division require more thought and attention to detail. | Sinclair ZX80 |
| 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 Programming: #9, Testing Bits for Branching | You can test any bit in any address simply by loading a register and choosing the right instruction code. | Timex/Sinclair 1000 |
| Machine Code Screen Fill | Simple 16-byte machine code program fills the screen with any character. | Sinclair ZX81, Type-in program |
| Machine Compatibility | A beginner wrote to ask: All of the following computers have the designation 80 — ZX80, Z80, Z80A, TRS-80. Are programs or software usable between each of these computers? Also there is a Z80 Softcard to apply Z80 programs to the Apple II. Is it reversible? | Sinclair ZX80 |
| Machine Language Programming – Logical Functions | Differences between 4K and 8K ROMs can be overcome with machine language. | Sinclair ZX80, Sinclair ZX81 |
| Machine Language Programming Made Simple for Your Sinclair ZX80 and ZX81 | Sinclair ZX80, Sinclair ZX81 | |
| Macronics Announces Floppy Disk Interface | Run a 5 1/4″ disk drive with your ZX/TS and Macronic’s new FIZ 1.1 interface. Interface plugs into rear edge connector with an expansion bus. | Timex/Sinclair 1000 |
| Maggie Bruzelius Leaves Sinclair | Facing an offer too good to refuse, Maggie became Director of Marketing for Alpha Software (Burlington, MA). One of the few growing software houses. Alpha sells an integrated package with database, spreadsheet, word processor & communications for IBM PCs, JRs & XTs “We’re steaming full ahead on business productivity software. Electric Desk is easy to […] | |
| Magic Square | Short program to generate magic squares for any number 35-99. | Timex/Sinclair 1000, Type-in program |
| Mail Order Big Keyboard | Keyboard available from Southern California Optical. | Sinclair ZX80 |
| Make-Do Connectors | At SYNTAX we use a Radio Shack connector. Their solderless edge-card, 40-pin connector (#276-1558) usually picks up all the contacts we need. We also use 40- conductor, insulation displacement, ribbon cable and mount the connector with a metal-jawed vise. | Sinclair ZX80 |
| Manipulating Strings | Routines broaden your ability to use strings in interesting ways. | Sinclair ZX80, Type-in program |
| Mastering Machine code on Your ZX81 | Review of the book by Toni Baker. | Sinclair ZX81, Timex/Sinclair 1000 |
| Mastermind | Number guessing game. | Sinclair ZX80, Type-in program |
| Math | Use Math to introduce your children to the ZX/TS and give them experience with basic skills of addition, subtraction, multiplication and division. | Timex/Sinclair 1000, Type-in program |
| Math Function Execution Time | User-tested timing of math functions. | Timex/Sinclair 1000 |
| Matrix Drawing | Draws characters on a 13×20 matrix. | Sinclair ZX80, Type-in program |
| Maximize Display File for MC | Poke RAMTOP to create a full display file. | Timex/Sinclair 1000, Type-in program |
| Maze Options | Otis Imboden’s 2-line Maze-O-Graphics inspired several readers. Here are their 4K ROM maze improvements , offering different methods. | Sinclair ZX80, Type-in program |
| Mazo-O-Graphix | Short program to create a maze. | Sinclair ZX80, Type-in program |
| Mazogs | Review of the game from Softsync. | Timex/Sinclair 1000 |
| MC Inkey$ Subroutine | Machine code routine returns the CODE value of the key pressed to your BASIC program. | Timex/Sinclair 1000, Type-in program |
| MC Programming #11: Storing MC Subroutines in REM | While you can store machine code subroutines anywhere in your BASIC program, the best place is 1 REM (& 2 REM, if you have two subroutines) . | Sinclair ZX80 |
| MC Programming #12: Calling and Returning | Tutorial on machine language programming. | Timex/Sinclair 1000 |
| MC Programming #9: Jumping Around | Most of the machine code subroutines held in REM will be be short around 100 instructions and data. Consequently, you won’t need the “JP nn” instruction. | Timex/Sinclair 1000 |
| MC Programming: PUSHing and POPping (Part 7) | Seventh installment of the machine code series, covering the Z80 PUSH and POKE stack instructions for preserving register pairs during machine code subroutines. Explains how to avoid crashing the ZX80/81 by PUSHing registers before use and POPping before returning to BASIC. Includes three rules and FAST/SLOW mode notes. | Sinclair ZX80, Timex/Sinclair 1000 |
| MD-1 Direct-Connect Modem and RS-232 Port | Review of Byte-Back’s modem. | Timex/Sinclair 1000 |
| MD-2 Modem | Review of the Byte-Back modem for the TS1000. | Timex/Sinclair 1000 |
| Memory Decoding Above 16K | Sinclair made the ZX81 RAM easy to decode up to 16K, but you may want to add memory beyond this point. To add more than 16K memory to your ZX80/81, you must do more than just: /A13 AND /A14 AND /A15 = /ROM CS. You’ll also need to account for the behavior of the display […] | Sinclair ZX80, Sinclair ZX81 |
| Memory Tester | MEMTST writes all zeroes into a byte, confirms that all bits equal zero by reading the byte, writes all ones in the byte, confirms that bits are all ones by re-reading the byte, then moves to the next byte. | Timex/Sinclair 1000, Type-in program |
| Memory Window | Display 16 consecutive bytes of memory in hex, decimal and character format. | Sinclair ZX80, Type-in program |
| Memotech 32K-Timex Incompatibility Reported | Readers report their Memotech 32K RAMs do not work with TS2040 printers. Memotech knows about this problem and sent a TS2040 to its British office for testing. | |
| Memotech 64K Memopak | The Memopak is undoubtedly the ultimate memory expansion for the Sinclair. Try DIM A(9500)! | Sinclair ZX80, Sinclair ZX81 |
| Memotech Announces New Computer | Memotech Corp. has announced a new computer which will reach stores in October. The 16-color Z-80 based unit, known as the MTX 512, holds 80K RAM, uses CP/M, Apple, IBM and Memotech’s own software, | |
| Memotech, Printer Incompatibility Solved | Memotech reports the cause of Memopak/TS2040 printer incompatibility—3 unneeded printer capacitors (C4-C6). | |
| Memotext Specifics | User’s notes on the program. | Timex/Sinclair 1000 |
| Memotext Word Processor | Review of Memotech’s word processor. | Timex/Sinclair 1000 |
| Merry Christmas | Display a Christmas message. | Timex/Sinclair 1000, Type-in program |
| MicroAce 8K ROM Replacements from Sinclair | If you bought MicroAce’s defective 8K ROM, send it to Sinclair Research with $10. They’ll send back a good 8K ROM. | MicroAce |
| Microace interface to MM57109 calculator chip | R.B. Turner plans to interface his 4K/2K MicroAce to the MM57109 programmable calculator chip to provide many scientific calculations. | MicroAce |
| MicroAce Out of Business in US | “MicroAce will cease trading in the US” in December, Kevin Hawkins of MicroAce just announced. No legal action forces the withdrawal, he said. MicroAce cannot compete with Sinclair’s ZX81. CompShop, the parent company, continues to do business in the UK. | MicroAce |
| MicroAce to Discontinue Kits | MicroAce is phasing out its computer kits. According to Bill Clark of MicroAce, Sinclair didn’t renew MicroAce’s license. The company also scrapped plans for a kit using larger ROM. “We can’t compete with the ZX81 in price,” Clark said. Other projects continue, however. MicroAce plans upgrade kits for machines, and video boards are in production. | MicroAce |
| MicroAce-ZX80 Component Equivalence | Chart showing part numbers and designations between the two computers. | MicroAce, Sinclair ZX80 |
| Microcommander Interface | Interface Technology has resumed plans to adapt the TRS-80 Microcommander to the ZX80. The device gives the computer direct control of up to 256 lights and appliances. | Sinclair ZX80 |
| Microperipheral Abandons Modem | Gave up plans to produce ZX80 modems because they had to add many hardware features not in the ZX80. Modem would have cost more than the original computer. | |
| Microsync Speaks | Interview with Bob Allen, service manager with Microsync. | |
| ML Scroll Routine | In 1K ZX80s, large programs easily overfill the 24 available screen lines. This machine language routine deletes the top line from the screen so you can add lines to the bottom. | Sinclair ZX80, Type-in program |
| Mod to Use Hunter RAM with > 32K | Hunter boards require a modification to work on systems with more than 32K RAM. | Timex/Sinclair 1000 |
| Modem Change Improves Temp Performance | SYNTAX had heard that 2050 MODEMS stopped at high temperatures, but the manufacturer says this problem no longer exists. Westridge, the maker, points out that the failures at 160F ambient were above the rated range anyway. | |
| Modifying Hex Monitor for 4K | Hex Monitor (May 81) stores ML programs without shielding them from BASIC. These changes load ML to reserved space. | Sinclair ZX80 |
| Money Talks; Timex Listens | Timex withdrew from retail sales of home computers and will employ their resource in other product lines. | |
| Monsters | Avoid four monsters (represented by Xs). You must go through a randomly generated maze, get to the other side and land on a black bar without being caught by a monster. | Timex/Sinclair 1000, Type-in program |
| Monthly Calendar | Displays a calendar for any month in any particular year. | Timex/Sinclair 1000, Type-in program |
| Monthly Income Graph | Creates a monthly income graph for a year. It lets you see which months your income rises and which months it falls. | Timex/Sinclair 1000, Type-in program |
| More 16K RAM Solutions | Brief hardware tip reporting two defects found in Sinclair 16K RAM packs: cut leads in the internal ribbon connector causing intermittent contact, and a misaligned grounding strap shorting the +5V and +9V supplies when the case is squeezed. | Timex/Sinclair 1000 |
| More Hardware Hints | Polish the board edge contacts for the RAM almost to bare copper. Otherwise grit gets in the solder and causes intermittent contact. | Sinclair ZX80 |
| Moving Billboard | This program continuously scrolls up to 23 (and more) lines of characters. Do not print more than 32 characters in any PRINT instruction, such as line 150, or the scrolling will fail. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| MULTIFILE — A Data Storage System | Review of the program available from Gladstone Electronics. | Timex/Sinclair 1000 |
| Multiple Regression Analysis | Review of the program from Programmers at Large. | Timex/Sinclair 1000 |
| Multiplication Exercise | This program asks for the multiplier (any number up to 3276) and then presents 5 problems, randomly choosing a number from 1 to 10. You get two tries to answer correctly. After the second try, the machine gives you the right answer with the next problem. At the end, it displays the number correct and […] | Sinclair ZX80, Type-in program |
| Multipurpose Memory Expansion | SABRE Systems has developed a multipurpose memory expansion board to use in a variety of RAM/EPROM combinations. | Sinclair ZX80 |
| Music Library | Music Library provides database management program with a convenient format for organizing your music collection. | Timex/Sinclair 1000 |
| National TS User’s Network to Form | Don Barnard of TSS is forming a new club that promises to provide the following services for $30/year. In addition, the network will provide product registration to eliminate duplication of titles and provide dealers with information on sources of supply and discounts. Dealers and local user’s group leaders will be allowed to sell memberships once […] | |
| Need fast ZX80/ZX81 service? | Service firm repaired partially-assembled ZX81. | Sinclair ZX80, Sinclair ZX81, Timex/Sinclair 1000 |
| Network Interface for Spectrum | Sinclair Research announces the ZX Interface I, enabling 64-machine, 100 Kbaud local area networking and modem transmission. | Sinclair ZX Spectrum |
| New 8K ROM Features | Updated list of the redesigned 8K ROM features not available on the 4K ROM and a brief explanation of their functions. | Sinclair ZX80 |
| New 8K ROM Plus Printer | Sinclair is revamping the ROM. The new chip will support the low cost printer Sinclair plans to introduce next year. | Sinclair ZX80 |
| New 8K ROM Potpourri | Sinclair’s first 8K ROM had a few bugs; list of changes to the 8K ROM map. | Sinclair ZX81 |
| New 8K ROM Routine Addresses | Here are the starting addresses for routines in the corrected 8K ROM. All addresses are hex. | Sinclair ZX81, Type-in program |
| New Features on TS2000, TS1500 | Advance publicity photos from Timex show some interesting features of the new TS2000 and TS1500. | Timex/Sinclair 1500, Timex/Sinclair 2000, Timex/Sinclair 2068 |
| New Magazine | Announcement of Creative Computing’s SYNC magazine. | Sinclair ZX80 |
| New Modem | MicroPeripheral Corp. will introduce a modem for ZX80 and MicroAce machines by 1 January 1981, enabling you to connect to other computers by telephone. | MicroAce, Sinclair ZX80 |
| New Prices from CAI | CAI Instruments announced new prices for their ZX peripherals. | |
| New Product Announcement (Syntax v3 n6) | ZX FORTH, battery back-up units. | Sinclair ZX81 |
| New Product Announcements (Syntax v3 n5) | Darkstar from F/22 Press for photographers; products from RKL Systems, Memotech. | |
| New Product Updates | Updates on the 8K ROM; printer. | Sinclair ZX80 |
| New Product Updates | Updates from Sinclair on 16K RAM units; MicroPeripherals on its modem and CAI. | |
| New Product Updates (Syntax v2 n1) | Prestodigitizer requires 8K ROM; Cognivox requires 16K RAM; MicroPeripheral modem held up. | Sinclair ZX80 |
| New Product Updates (Syntax v2 n2) | CAI is accepting orders for their products. | |
| New Products (Syntax v3 n11) | New products from R.S. Panwar, Wisconsinc Electronics, Sinware, P. Pollack, Nanos. | |
| New Products and Services | AFR Software announces ZX-Calc; Raedata announces Micro-ROOTs, a journal for people interested in genealogy. | |
| New Products and Services (Syntax v3 n10) | New products from Tom Woods, Hunter, Miller-Zamis, International Publishing and Software, King Software, Hamrich International, P. Pollak, E-Z Key. | |
| New Products and Services (Syntax v3 n12) | New products from Matthew Zenkar, G. Russell Electronics, MicroSync Services, Stephen Adams, E. Alvarez, Norris Electronics, Gladstone, Kopak, M.C. Hoffman, Stuart Software, Dale Lipinksi, TSG Enterprises, QZX Newsletter, Intercomputer, Lamo-Lem, JACYN Electronics. | |
| New Products and Services (Syntax v3 n9) | New products from f/22 Press, NIM Electronics, Stuart Software, Norris Electronics, G. Russell Electronics, Lyon Ware, Fulcrum Products, Martin Irons. | |
| New Products and Services (Syntax v4 n1) | New products from KSOFT, D. Lipinksi, ZX Software Team, M.C. Hoffman, Run-it Software Club, Startext, Expense Cutters Products, Computa-Dek, Bytesize Computer Products, Computer Continuum, Martin Irons, Rose Aircraft. Charles Durang will not publish ZX Newsletter, focus on books instead. | |
| New Products and Services (Syntax v4 n10) | New products from UAS, John Carson, A. Rodriguez, Williamware, ROMPAK, Intercomputer, Micro-Load, Soft Magic Corp., Larimar Inc., Robotec, Simulsion. | |
| New Products and Services (Syntax v4 n11) | New products from Hawg Wild, Z-West, 2-Bit Software, Phoenix Enterprises, Warren Imports Group, Russell Brewer, Goldwater Manufacturing, John Carson, Labsoft, Occam Research, Golden Stair, E. H. Enterprises. | |
| New Products and Services (Syntax v4 n12) | New products from TAG Software, Gesang Associates, Intercomputer, ACE Software, Thomas B. Woods, Delphic Enterprises, Sinware, E. Arthur Brown, Softsync, Macshak Software. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| New Products and Services (Syntax v4 n2) | New products from Expense Cutters Products, JPR Software, Biocal, Memotech, R.S. Panwar, Wisconsinc Electronics, Calliope Software, Practical Computer Products, Melear Marketing, SofTek, RAMSTRAP, Syncware,f/22 Press, Hunter, Friendly Computer, M.C. Hoffman, Integrated Data Systems, Softsync. | |
| New Products and Services (Syntax v4 n3) | New products from Compuwiz, R.I.S.T., Banta, Software Unlimited, Z-West, Synergistic, Sinware, Spectra Computer Products. | |
| New Products and Services (Syntax v4 n4) | New products from Artisan Electronics, Spectra Computer Products, Jim Giddings, L. Harmon, Cosmonics, Memotech, Hawg Wild, Electronic Specialists, Sinware, Cottage Technology, Advanced Interface Designs, Software Unlimited. | |
| New Products and Services (Syntax v4 n5) | New products from Timex, J.V. Kane, Silicon Valley North, ZX-Panding, Computer Engineering Services, M-Ware, W.D. Maples, Kaltek Calculator Technology, J.J. Castillos, Florida Creations, Stuart Software, Laserscan Electronics, International Publishing & Software, 2-Bit Software, LINC. | |
| New Products and Services (Syntax v4 n6) | New products from Daydesign, Compuwiz, G. Russell Electronics, SofTec, DJM Software, Compucraft, DK’tronics, Timeworks, Toptronics, Florida Creations, ZX/TS Software Exchange Club, Busyness, SyncWare, Memotech, Stuart Software. | |
| New Products and Services (Syntax v4 n7) | New products from Tom Woods, Kopak, L. Harmon, f/22 Press, 2-Bit Software, Barlog Software, Celestial Software, SyncMaster, CRC Software, Timeworks, K.D.V.H.E. Publishers, Starburst Software, Intercomputer, Hawg Wild, D. Lipinski Software, Polymath, Russell Brewer, Bob Fingerle. | |
| New Products and Services (Syntax v4 n8) | New products from Magic World Software, Hawg Wild, Bob Fingerle, Gladstone, CompuTech, Pyramid Software, Ultimate Blackwood, SyncWare News, H. R. Brady, Timeware, Biocal, Robotec. | |
| New Products and Services (Syntax v4 n9) | New products from Matthew Zenkar, SyncMaster, John Carson, I.M.S. Enterprises, Banta Software, ZX-Panding, Syber Inc., KSOFT, E-Z Key. | |
| New Products and Services (Syntax v5 n1) | New books from Prentice-Hall, Hayden; SRS Speech Recognition System from G. Russell Electronics; DO-CALC; Software from Banta Software; RAMPAGER from Robotec. | Sinclair ZX81, Timex/Sinclair 1000, Timex/Sinclair 2068 |
| New Products and Services (Syntax v5 n10) | Cryptic Gold; fifth generation computing; ZX-Calc accounting system; budget robotics; graphics tablet from Zebra; programmer’s market; monitor tuners; Oddball Software Magazine. | Sinclair ZX81, Timex/Sinclair 2068 |
| New Products and Services (Syntax v5 n11) | Tom Woods sells enhanced Mscript; Byte-Back offers new A/D converter; Tom Bent’s 8K ROM; Powerful Projects with Your Timex/Sinclair; D. Lipinski’s buyer’s guide; Spec-Tax; control your computer with brain waves; green screen monitors. | |
| New Products and Services (Syntax v5 n2) | New products from Pheonix Enterprises, D. Lipinski Software, Robert Fingerle, A&J Microdrive, Maples Enterprises, Cottage Technology, JK Audio, Interface Design, Apropos Technology. | |
| New Products and Services (Syntax v5 n3) | Updates and new products from Thomas B. Woods, ROMPAK, JRC Software, Games to Learn By. | Timex/Sinclair 2068 |
| New Products and Services (Syntax v5 n4) | New products from Len Harmon, Bob Fingerle, International Software Database Corp, Andre Baune, John Kuhn, Sharp’s, RAM Products. | |
| New Products and Services (Syntax v5 n5) | Biocal Software (167 Wilson St., Petaluma, CA 94952 707/7634348) announces new software for the ZX/TS: Rebound (paddle ball game). Life (Conway’s classic simulation) , Bomber (fly over a city and destroy), Z80DA (disassembler and machine code monitor with CAI/ESF and CAI/P40 options). Backgammon (version updates $2 + original copy). Blackjack (up to 4 players), Bar-Dice […] | |
| New Products and Services (Syntax v5 n7) | AFR Software announces new programs; Zebra operates bulletin-board system for T/S users; Soft Images offers the 1983 cumulative edition of Literature Analysis of Microcomputer Publications, an index of 130 periodicals. | |
| New Products and Services (Syntax v5 n8) | Forth from Hawg Wild; Spectrum ROM kit; Multi-Draw 2068. | Timex/Sinclair 2068 |
| New Products and Services (Syntax v5 n9) | Peech II Productions supplies 2068 educational software titles ranging from VERBS to DRAWING priced under $10. For details write them: 6333 Parkman Pi, Cincinnati, OH 45213. Magic World Software is sole source for INVO-STAR inventory management system. Cassette data storage and menu-driven functions let you print pick lists & packing slips on your 2068 + […] | Timex/Sinclair 2068 |
| New Products in Development (Syntax v5 n6) | SoftSync’s 2068 version of Arctic’s disassembler expected midsummer. Hawg Wild’s FORTH and graphics packages for 2068. And an expander for 2068s, expected to provide RGB & RS-232 output, disc controller, & 64K of addon memory. Plus a source of Chameleon ROMs. | Timex/Sinclair 2068 |
| New Publications | QZX newsletter serves amateur radio operators who own ZX80s, published by Martin Irons. | |
| New Timex Configuration | OUT (ROSS): IN(X): NEW: GOTO start: seems to be the BASIC command line issued by Timex’ visionary chairman, T. Fred Olsen. | |
| New ZX/TS Publication | Timex-Sinclair User, a monthly magazine imported from the U.K., debuts in N. America in May. | |
| New ZX80 ROM and RAM Soon | Product announcement for 8K ROM for ZX80 and 16K RAM expansion modules. | Sinclair ZX80 |
| New ZX81 Hardware/Software Vendor | Mindware Co. will introduce Barscan for ZX81s in the next few weeks. Barscan uses bar code technology to process collected data on attendance and job costs and can produce standardized printed reports. It provides 16K RAM and self-prompting programs for nontechnical users. | Sinclair ZX81 |
| News from MicroAce | MicroAce offices are open after 3 week holiday; will soon market a book called The ZX80 Magic Book. | MicroAce |
| News from MicroAce | MicroAce plans to sell plug-in 16K RAM boards with 3 extra connector slots. The extra connectors will be 50 pin, not 46 (as the rear edge connector is), because of the unavailability of 46 pin plugs. MicroAce is still without a full-time manager, but Bill Clark, engineer, is serving temporarily until they find a full-timer. | MicroAce |
| News From MicroAce | MicroAce and ZX80 owners who want the flicker-free feature of the ZX81 can get it with an add-on board from MicroAce. The board contains only 6-7 chips and solders onto your PC board. The cover fits over the machine with the board installed, although the fit is a little tight on a ZX80. | MicroAce, Sinclair ZX80 |
| News, New Products | News column covering the Rosetta Stone Award (Ian Logan wins first prize for ZX80 ROM disassembly), the Timex license to sell Sinclair computers in North America, Memotech 64K RAM availability, and MicroSync as authorized repair service. | Sinclair ZX81, Timex/Sinclair 1000 |
| News, New Products | News section covering: Timex plans for TS1000 retail in major department stores with 14 software titles; Mindware introducing the MW100 16-column dot-matrix printer for 8K ZX/TS1000; National Electronics III closes; various new products including Data-assette tape controller, EconoTech 16K RAM, VOTEM analog interface, and LJH keyboard enclosures. | Timex/Sinclair 1000 |
| 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. | |
| News: Sinclair News and New Products | News column covering: Sinclair ZX80 PCBs sold out; ZX printer still in FCC approval; mismarked cassette tape issue; Mindware Co. announcing exclusive UK software/hardware distribution; Byte-Back ZX81 modems and memory modules with delivery delays; and the S&S Company announcing SYNCHRO-SETTE cassette/magazine publication. | Sinclair ZX80, Timex/Sinclair 1000 |
| Nigel Searle Shows QL at BCS | Searle demonstrated the QL’s features and power to the General Meeting of the Boston Computer Society. | Sinclair QL |
| No News About No Deal | No persons knowledgeable about the bulk sale of Timex inventory or any proposals from any potential buyers were available at Timex. Doug Smith verifies that all computer hardware inventory is sold, and a bulk buyer bought much of it. | |
| Nonauthorized ZX81 Sales and Service | National Electronics III of Concord, TN, has become a nonauthorized reseller of new assembled ZX81 systems. | Sinclair ZX81 |
| Norris Electronics Back in Slidell | We reported incorrectly that Norris Electronics moved to Metairie, LA (Apr.83). | |
| Not Entirely Clear | Enter this line by hitting 1, CLEAR, cursor back, REM, NOT, /. Execute via RAND USR 16514. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Not Out of the Woods Yet | Tom Woods promises you will get PRO/File’s manual, but he is not yet finished. Work on the 100-page book proceeds regularly despite Tom’s new SyncWare News responsiblities. | Timex/Sinclair 2068 |
| Note on copyright; REM skips next line | REM statements with copyright notices do constitute legal protection; a blank REM causes the interpreter to skip next line. | Sinclair ZX80 |
| Notes on the ZX80 Display File | Brook Mick’s letter (Oct. 81) recalls our early experience with our ZX80. We tried the exercise in the manual, p.24. In the 15th line, every character typed made another disappear from the screen! The answer appeared in an article by David Tebbit, reprinted in Sync. | Sinclair ZX80 |
| Nuclear Decay Simulation | A popular lab exercise uses special dice to simulate radioactive decay. Marked die faces show the decay probability. After shaking and throwing the dice, replace those with marked sides showing with spheres (stable atoms) or dice with different decay probability (radioactive daughters). Use over 200 atoms for a smooth graph. This program throws, examines and […] | Sinclair ZX80, Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Numbers Held Inexactly in the ZX81 (Part 2) | Second part of the series on ZX81 floating-point representation, focusing on positive integral powers of 10. Explains that powers of 10 from 10 to 1E13 are held exactly, while 10**N forms are slightly inaccurate. Includes method for manually verifying accuracy. | Timex/Sinclair 1000 |
| Numbers Held Inexactly on the ZX81 | First in a series of articles on numerical errors in the 8K ROM. | Sinclair ZX81 |
| Numbers Held Inexactly on the ZX81 | The largest is really this 39-digit number: 170141183420855150474555134919112130560. | Sinclair ZX81, Timex/Sinclair 1000 |
| Numbers Held Inexactly on the ZX81 (Part 1) | First part of a series examining floating-point representation errors in the ZX81 8K ROM. Focuses on integer powers of 2 and how the ZX81 stores them, with programs to examine raw floating-point bytes and demonstrate inaccuracies at specific powers (13, 26, 27, 31, 52-54, 61, 62, etc.). | Timex/Sinclair 1000, Type-in program |
| Numbers Held Inexactly on the ZX81 (Part 5) | Fifth and final part of the series, covering FOR-NEXT loop counter behavior with non-integral step values. Explains why floating-point imprecision requires slightly overstating loop limits and rounding with INT(N+.5). Also notes a subtraction quirk in the ZX81’s ROM and its source. | Timex/Sinclair 1000 |
| Numbers Held Inexactly on the ZX81, Part 4 | The ZX81 doesn’t hold simple decimals like .5 & .25 exactly. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| NY Out of Numbers – Zebra AC Changed | Zebra reports 1400 calls during the first 8 weeks of operation. This level of activity encouraged them to upgrade from the TRS-80 Model I to a Model 4 with 4 disk drives. | |
| Odd Reports From All Over | Computers, like humans, often give confusing answers, doing the best they can to tell you what’s wrong. | |
| Office Manager | Office Manager creates and stores three separate files: a phone directory, report file (each 150 lines max) and memo file (20 lines max). | Timex/Sinclair 1000, Type-in program |
| Ohm’s Law | Program to calculate values based on Ohm’s law. | Timex/Sinclair 1000, Type-in program |
| Ohm’s ZXlaw | ZXlaw calculates 4 functions of Ohm’s law: Power (P) in Watts, Current (I) in Amps, Voltage (V) in Volts & Resistance (R) in Ohms. | Timex/Sinclair 1000, Type-in program |
| Okay – So It Comes In Baggies | In our vendor reports last month, SYNTAX said Timex software doesn’t come in baggies. Yes it does, and honest stuff, too. Yes it does, and honest stuff, too. As Marty Warner-DuBay pointed out to us after getting a flurry of phone calls from her dealers for the licensed programs she sold in baggies, with photocopied […] | |
| On Goto Statements | Mimic ON GOTO with an array variable. | Timex/Sinclair 1000, Type-in program |
| Out Front to Stay | Prediction of staying power of Sinclair ZX80. | MicroAce, Sinclair ZX80 |
| Pause Without Flash | Techniques to avoid screen flashing during PAUSE in SLOW mode. | Timex/Sinclair 1000, Type-in program |
| PEEK, POKE & CHR$ for Beginners (4K) | Explanation of the commands and functions. | Sinclair ZX80, Type-in program |
| Penny Gambler | Have some fun playing poker with your computer-naive neighbor. | Timex/Sinclair 1000, Type-in program |
| Personal Net Worth | Track of your personal finances and figures your current net worth. | Timex/Sinclair 1000, Type-in program |
| Phone Dialer | Circuit and program to turn the ZX80 into a phone dialer (mechanical). | Sinclair ZX80, Type-in program |
| Phone Number Word Generator | What does your phone number spell out if changed to letters? A friend’s phone number, 438-5678, spells GET LOST. A bank’s auto loan department answers NEXT CAR. | Sinclair ZX80, Sinclair ZX81, Type-in program |
| Pi | This program can calculate PI to over 8000 decimal places— but don’t hold your breath. It takes over 12 hours for 512 digits! The algorithm uses base 100 arithmetic, storing each digit in one byte of a character string (codes 0-99). It is based on the Taylor series for the arctangent. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Pie Chart Graph and Display | Program draws a pie chart graph with up to 10 sections. | Timex/Sinclair 1000, Type-in program |
| Pie Chart: A Refinement | Refining Ron Oblander’s chart (Nov. 82) makes it run faster and puts table and chart on 1 display. | Timex/Sinclair 1000, Type-in program |
| Placing USR Calls in 4K, 8K | Differences between both ROMs and machine code locations. | Sinclair ZX80 |
| Pledge Keeper | Simplifies recording pledges and can be especially helpful during telethons or other fund raising events. | Timex/Sinclair 1000, Type-in program |
| Poke Down and Abbreviated Save/Load | Poke to limit RAMTOP and have shorter save/load times. | Timex/Sinclair 1000 |
| Poke Graphics | Speed up graphics and save memory by using POKE. | Timex/Sinclair 1000, Type-in program |
| Poke: Small Change for Machine Language Pokers | Short “monitor” program. | Timex/Sinclair 1000, Type-in program |
| Price Rise Coming | Subscription prices must rise for SYNTAX. We can’t hold the line any more. Cost increases force us to charge more. | |
| Prime Numbers | Program lists all prime numbers between 1 and 1000. | Sinclair ZX80, Type-in program |
| Printer with Mini-Interface | CAI has introduced a stand-alone printer with a mini-interface for the ZX/TS computer. It works only with 16K and is $139.95. | Timex/Sinclair 1000 |
| Printing on the 8K ROM | One of the 8K ROM’s nicest features is its increased printing capability. | Sinclair ZX81 |
| 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 |
| Problem-Solving Circuits | If your power line voltage is 120V or higher and you use a 16K RAM, heat build-up in the ZX81 is a problem. | Sinclair ZX81 |
| Problems Solving Principles for Programmers: Applied Logic, Psychology and Grit | Review of the book by William Lewis. | |
| Production 1500s and 2068s Sold in US | Early shipments of TS2068s are selling well — Sears reordered 4000 units according to Dan Ross, Timex VP. A few units available at the Boston Computer Society TS Celebration disappeared quickly. Buyers snapped up 1500’s as well. Early tests suggest 1500 compatibility with most peripherals. | Timex/Sinclair 1500, Timex/Sinclair 2068 |
| Program Access Security System | Short machine code program prevents program access without a code after you LOAD your program. | Timex/Sinclair 1000, Type-in program |
| Program Clarifications | Corrections to Golf Partner and Weather Forecast. | Timex/Sinclair 1000 |
| Program Corrections | Corrections to programs from previous issues: corrected Blackjack listing (Clifford Efaw), Hex Math 8K fix (Leo Morgan), Flags Register article error (Jon Bobst), and Income Tax program corrections (Lane Lester). | Timex/Sinclair 1000 |
| Program Corrections and Improvements | Corrections to previously published programs: Phone Number Word Generator (Lawrence Souder), simultaneous equation solver (Lori Olson), Digital Clock improvements (Tom Finley), Hexadecimal Math 8K ROM changes (Leo Morgan), and 4K Blackjack 8K ROM changes (Clifford Efaw). | Timex/Sinclair 1000, Type-in program |
| Program Impovements | Correction to Banner Writer. | Timex/Sinclair 1000, Type-in program |
| Program Improvement | Improve video effects in Letter Recognition Train. | Timex/Sinclair 1000 |
| Program Improvements | Corrections to ON GOTO, Office Manager. | Timex/Sinclair 1000, Type-in program |
| Program Improvements | Improvement to Syntactic Sum, MC Video Invert. | Timex/Sinclair 1000, Type-in program |
| Program Improvements | Improvement to Spelling word Game; simplify Set Ramtop Automatically. | Timex/Sinclair 1000 |
| Program Improvements | Improvement to program in Numbers Held Inexactly, Mar and Apr 1982. | Sinclair ZX81 |
| Program Improvements | Improvements to Big Characters, Line Renumbering and Powers of Negative Numbers. | Sinclair ZX81, Type-in program |
| Program Improvements | Improvement to Reusable Loops. | Timex/Sinclair 1000, Type-in program |
| Program Improvements | To see more ROM calls in Marty Iron’s program translated for the 2068, you must change lines 100 and 210 to use 14446 instead of 7679. Expect run time of about 1 hour. Cassette Labeler needs changes in lines 27 0 and 370 if you want to use full 30-character lines on a 2068 version. […] | Timex/Sinclair 2068, Type-in program |
| Program Improvements | Improvements to READ-DATA-RESTORE, Flower Plot, Income Tax program. | Sinclair ZX81, Type-in program |
| Program Improvements | Stop Firstloader before it translates. | Timex/Sinclair 2068, Type-in program |
| Program Improvements | Corrections to 8K Digital Clock, Hexadecimal Math and 4K Blackjack. | Sinclair ZX80, Sinclair ZX81, Type-in program |
| Program Improvements: Sort Routine | Shortened version of Leo Morgan’s string sort routine from Oct. 1981, reducing it by two lines by using an inverted space character (higher code than any standard character) to eliminate boundary-checking lines. | Timex/Sinclair 1000, Type-in program |
| Program Improvements/Refinements | Comment on Math Execution Time. | Timex/Sinclair 1000, Type-in program |
| Program Improvements/Refinements | Improvement to Harold Miller’s MC screen fill program. | |
| Program Improvements/Refinements | Improvement to Sine Name, Hexadecimal Math, Bytes Remaining, Bar Chart. | |
| Program Improvements/Refinements | Correction to Star Hunter, Composer by Lamo-Lem, Solar Program, Etching. | |
| Program Improvements/Refinements | Change to Blackjack. | Timex/Sinclair 1000, Type-in program |
| Program Improvements/Refinements | Improvement to Sweetheart. | |
| Program Improvements/Refinements | Prevent Syntactic Sum from wiping out program. | Timex/Sinclair 1000, Type-in program |
| Programmable Moving Display | At last you can know the secret of true flicker-free continuous display through software! If you’re a 4K ROM user envying the ZX81’s continuous display, envy no more. For about $10 you can code a rock-steady, moving display into your 4K ZX80. | Sinclair ZX80 |
| Programmed Responses – Latin Roots | Drill for students of Latin and Greek. | Sinclair ZX80, Type-in program |
| Programming Contest | Computer Engineering Services is sponsoring a Sinclair ZX programmers’ contest. | |
| Programming Language Terminology | Definition of terms. | |
| Proprietary International Announces ZT21000 | Details of their new co-processor for ZX/TS computers, the ZT21000. | Timex/Sinclair 1000 |
| Publications Guide | Lists over 350 computer, technology, electronics, and business magazines, newsletters, and report/database services. | |
| Putting Forth on ZX80/81s | Although BASIC is the most common language for programming microcomputers, it is not the only one. Your ZX80 or 81 can learn FORTH, another high level language. | Sinclair ZX80, Sinclair ZX81 |
| QSAVE | Aids in loading balky tapes and the time saved in loading long programs is certainly worthwhile. | Timex/Sinclair 1000 |
| QSAVE Cuts Save/Load Time | QSAVE, a 2-part package, drastically cuts your ZX81 SAVE/LOAD time. The software increases the baud rate, or data transfer, of ZX81s to 4000, saving or loading 16K in 29 seconds. | Timex/Sinclair 1000 |
| Quick Tape Loading and Saving by Mindware | QUICKLOAD software loads/saves 6x faster than current ZX/TS software and verifies whether the program loaded properly. | Sinclair ZX81 |
| Quote Without Comment | Timex Computer order form. | |
| RAM Decoding for ZX81 | Last March we published Al Salt’s plans for adding external RAM to ZX80s. To adapt his Build Additional RAM (SYNTAX 02/03/02) with ZX81s, you can take ne of three approaches. The second two of these plans do not require you to modify the insides of your ZX81. | Sinclair ZX81 |
| RAM-Drive | RAM-Drive is a machine code utility program that gives you powerful program editing comands. | Timex/Sinclair 1000 |
| RAND and Autorun | RAND will not work properly on ZX/TS machines if the program RUNS automatically when LOADed. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Random Functions in 4K, 8K | Compare RND (4K, 8K), RAND (8K), and RANDOMISE (4K) . | Sinclair ZX80, Sinclair ZX81 |
| Random Pixel Plot | Two line program to randomly plots points. | Sinclair ZX81, Type-in program |
| READ-DATA-RESTORE Subroutine | Technique for simulating READ, DATA, and RESTORE statements (absent from ZX81 BASIC) using a string variable as a data container and subroutines as READ and RESTORE equivalents. Includes both integer and decimal data variations. | Timex/Sinclair 1000 |
| Reader’s Report on MicroAce Video | Not for neophytes– that’ s John Strain’s assessment of the MicroAce Flicker-Free Video Add-on Board. According to John, “The flicker-free mod circuit board does not physically fit inside the ZX80 case. The components supplied completely prevented mounting the circuit board inside the ZX80.” Also, you can’t use the top display line; you must add components […] | MicroAce, Sinclair ZX80 |
| Reading Machine Code Assembly | Beginning machine language (ML) programmers sometimes have trouble deciphering all the numbers that make up an assembly listing. | Sinclair ZX80 |
| Real-Time Soft Clock | Creates a software clock from the 3.25 MHz ZX/TS logic clock using the system variable FRAMES at decimal addresses 16436 and 16437. | Timex/Sinclair 1000, Type-in program |
| Recipes for 2068 Advanced Video | Programs that demonstrate the 64 column mode. | Timex/Sinclair 2068, Type-in program |
| Redesigned Telephone Dialer | Revisions to the telephone dialer available from a reader | Sinclair ZX80 |
| Reduce 4K Loading Noise | 4K ROM users: instead of building our Cassette Eavesdropper (Dec. 80) to reduce loading noise, try a dual mini-plug from Radio Shack. | Sinclair ZX80 |
| Reference Card for the ZX80, ZX81 and Timex Sinclair 1000 | Review of the card from Nanos Systems. | Sinclair ZX81, Timex/Sinclair 1000 |
| REM Statements | REM statements can be useful tools for beginning programmers, REM stands for REMark. You can also think of it as REMinder or REMember. The computer does not execute REM statements. It will ignore anything you write after REM in any line. Use REM to write notes to yourself about the functions of various parts of […] | Sinclair ZX80 |
| Removing ICs safely and cheaply | Instead of buying costly tools for IC removal, get binder clips (with springs). | |
| Renumber | Utility programs for renumbering the lines of BASIC programs facilitate merging with other programs, spreading out line numbers to make room for additional lines, and neatening up finished programs. Changing line numbers is easy, but a useful renumbering utility must also fix the destination line numbers in GOTOs and GOSUBs, a more difficult task. This […] | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Report from the 3rd ZX Microfair | The third ZX Microfair was held 30 April-1 May 1982 in London. Besides Sinclair’s new Spectrum, we saw some new ZX81 products. | |
| Retrace Your Steps | This program lets you draw on your screen using arrow keys and stores your drawing in an array. | Timex/Sinclair 1000, Type-in program |
| Return on Investment | Program computes compounded annual rates of return on single investments and monthly annuities. | Timex/Sinclair 1000, Type-in program |
| Reusable Loops | You can shorten and clarify some of your programs by using one loop and several flag variables to perform related operations. For a sample, let’s take a utility that creates, modifies, moves, checks, and prints a ten-byte MC routine. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Reverse | The object of this game, rewritten from one published by Creative Computing, is to get the numbers in ascending order from left to right. | Sinclair ZX80, Sinclair ZX81, Type-in program |
| Reverse Video for ZX80 | Letter to the editor describing a reverse-video circuit for the ZX80. | Sinclair ZX80 |
| Reverse Video Monitor Driver | This circuit, using the concept published in Electronics, drives a video monitor and reverses video on demand. | Timex/Sinclair 1000 |
| Reversi | Review of the program published by Zeta Software. | Timex/Sinclair 1000 |
| Rhythm-Fun | Teaches basic rhythm timing and sight reading for quarter notes. | Timex/Sinclair 1000, Type-in program |
| ROM List Delay | 4K ROM assembly listing has been delayed for a couple of weeks. | Sinclair ZX80 |
| ROM V. RAM | Explanation of the difference. | |
| ROMPAK ROM Card | ROMPAK permits you to use many programs instantly—cartridges in the rough. An adaptor plugs onto your ZX/TS and provides a socket to contain the program ROM. A simple machine code routine in the ROM moves the program into RAM in under a second, and you’re ready to go. | Sinclair ZX81, Timex/Sinclair 1000 |
| Rosetta Stone Nominations Being Accepted | Nominations are open for the 2nd annual Rosetta Stone award, given for the best independent product (application, software package, peripheral) for ZX/TS computers. | |
| Rounding off Routine | The 8K ROM’s floating point decimal is great, but sometimes you don’t need 9 decimal places. | Sinclair ZX81, Type-in program |
| Routine Elimination | If you PEEK the code from the REM line and POKE into protected memory for running, you can eliminate the loading routine by writing the REM line in hex equivalents to ML decimal codes. | Timex/Sinclair 1000, Type-in program |
| Rubbing It In | Technique for typing on typing on membrane keyboard. | Timex/Sinclair 1000 |
| Rumors Persist, But Still No Deal | Despite many persistent rumors, Timex says no group has emerged to take over their computer business. SYNTAX can find no evidence of a credible buyer even at the stage of serious negotiations — despite what you read elsewhere. | |
| Running MC in a String Variable | You can place and execute machine code (MC) in three places: REM line, memory reserved above RAMTOP, and a string. | Timex/Sinclair 1000, Type-in program |
| Salary Scheduling Cost Computation | This 8K/16K program computes salary schedules for two or three classes of teachers (or other workers). For a two column schedule, enter all zeros for the prompts about the third class (Mast+). At the end of the second column, it will ask if you want another. Enter NO and touch NL. The computer will give […] | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Save on Save and Load | Collapse screen memory before saving. | Timex/Sinclair 1000, Type-in program |
| Saving Unsaveable Programs | This trick LOADS any program and then returns to BASIC, without activating the error detector. | Timex/Sinclair 1000 |
| Screen Background for Games | A dark or solid background often gives a better effect for printing or plotting in games. With an 8K ROM and 16K RAM, an almost instant background is possible in BASIC. | Sinclair ZX81, Type-in program |
| Scroll Call – Everybody Up | Alter ZX/TS SCROLL commands to USR 2361 for the 2068, or USR 3582 for the ZX Spectrum or Emulator. | Sinclair ZX Spectrum, Timex/Sinclair 2068, Type-in program |
| Season’s Greetings | Here is our personalized holiday greeting to you, courtesy of your ZX80 or MicroAce. With a little clever substitution in lines 450- 640, you can adapt this listing to produce your own video Christmas card. | MicroAce, Sinclair ZX80, Type-in program |
| Second Annual Rosetta Stone Award | Sponsored by Mindware Inc. is for outstanding achievement in ZX/TS hardware or software development. | Timex/Sinclair 1000 |
| Self Running Programs | Making a self-running program on the ZX81 is very simple. Just insert a SAVE statement at the place you want the computer to continue from. | Timex/Sinclair 1000, Type-in program |
| Set RAMTOP Automatically | Progam automatically sets your machine up for machine code routines in high memory by moving RAMTOP. | Timex/Sinclair 1000, 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 |
| Side-Scrolling Billboard — 8K | Machine code program that scrolls a user-entered message across the screen using 8×8 large characters. Decodes the first 63 characters of the character generator. Requires more than 1K RAM. Includes step-by-step loading instructions and checksum verification (9231). | Timex/Sinclair 1000, Type-in program |
| Significant Figures Subroutine | Display the significant figures of a number. | Timex/Sinclair 1000, Type-in program |
| Simulate READ, DATA for Strings | Although your ZX80 (both ROMs) or ZX81 does not have READ, DATA or RESTORE functions, you can easily mimic them with other functions. | Sinclair ZX80, Type-in program |
| Simulating Integer Arrays | Technique for simulating integer arrays using PEEK and POKE in ZX81 BASIC, storing values 0-255 in REM-reserved memory rather than floating-point variables. Demonstrates significant memory savings: a DIM V(8,8) float array (320 bytes) reduced to 64 bytes with this method. | Timex/Sinclair 1000 |
| Simulsion Releases 16K ZX/TS Software | Simulusion, now located at Box 2382, La Jolla CA 92038, now offers 11 cassette packages for ZX/TS machines, including 2 with recipes for drinks and party snacks. All do home tasks or play games. Write for free catalog. | Timex/Sinclair 1000 |
| Sinclair 8K ROM Software | Sinclair now offers cassette programs for the ZX80 and ZX81 with 8K ROM. | Sinclair ZX80, Sinclair ZX81 |
| Sinclair Announces QL; Plans US Mkt Re-Entry | Sinclair Research, Ltd announced in London a new machine—the Sinclair QL—using the 68008 processor running at 7.5 MHz. Late February should see initial shipments in the UK, with production building to 20,000/mo by summer. Introductory price in the UK is $599, but the US price will likely be $499 when the machine arrives here, perhaps […] | Sinclair QL |
| Sinclair Announces ZX81 Computer | Sinclair Research unveiled a new computer at a press conference in England in mid-March. The ZX81 comes with the same 8K ROM that will be available for ZX80s and 1K RAM and sells for 30% less than the original ZX80. Sinclair does not plan any export sales so far, and has not submitted the ZX81 […] | Sinclair ZX81, Timex/Sinclair 1000 |
| Sinclair Clarifies Parts Position | Sinclair only sells replacement parts to kit owners who received damaged parts with their kits. | Sinclair ZX81 |
| Sinclair Considers Selling Spectrum+ in US | Sinclair informs SYNTAX that they are considering selling Spectrum+ in the US. | Sinclair ZX Spectrum |
| Sinclair Develops 1-mbyte Memory Wafer | According to reports in EE Times, Sinclair Radionics has developed wafer-scale, serial-access memory with battery backup using a 12-year-old technique to connect low-power NMOS dynamic RAM cells in a redundant logic structure. | |
| Sinclair Discontinues Tech Info Line | Nigel Searle of Sinclair just announced that Sinclair would no longer staff their technical information line in Boston. | |
| Sinclair Drops US ZX Prices as of 1 June | Sinclair Research lowers the prices on their ZX products in the US 1 June 1982, according to Margaret Bruzelius of Sinclair. New prices: Assembled ZX81, $99.95; ZX81 kit, $79.95; 16K RAM pack, $49.95. ZX81 owners will receive a new software brochure this month. ZX80 owners should write to receive a copy. | Sinclair ZX81 |
| Sinclair Expands Eastward | Sinclair Research Ltd., is building up its presence in the Middle East, where its key markets are Saudi Arabia, Egypt and the Gulf States. | |
| Sinclair Fall Computer Show | Sinclair Research plans to hold computer shows to introduce its ZX81 this fall. Response to the first show, to be held in Boston, will determine later sites. No dates have been announced, but Sinclair’s Nigel Searle said that the Boston show will closely follow the Federal Communications Commission’s approval of the ZX81 (expected shortly). Sinclair […] | Sinclair ZX81 |
| Sinclair Forecast | ||
| Sinclair News – ROMs and RAMs Here | By the time you read this, Sinclair will have delivered all 8K ROMs and 16K RAMs on order, according to Nigel Searle of Sinclair. | Sinclair ZX80 |
| Sinclair Printer by 1982 | Sinclair engineers will redesign the printer to meet US requirements at the end of September, 1981. | |
| Sinclair Product Updates | Sinclair’s ZX81 computer reaches the US on Oct. 7, 1981. | Sinclair ZX81 |
| Sinclair Shipments Pick Up | Sinclair caught up with their ZX80 shipping schedule in November because production rates are up to meet the demand. | Sinclair ZX80 |
| Sinclair Stops Production of ZX Accessories | No more RAMpaks and ZX printers will pour off assembly lines. Even the fabled ZX81, once made at the rate of one every 10 seconds, will now be produced only to order, and then mostly for export. | |
| Sinclair Tech Line Over, Plans Think-Tank | Sinclair Research no longer provides technical information by phone. | |
| Sinclair to Concentrate on QL in US | Sinclair QL | |
| Sinclair to Replace Faulty 8K ROMs | A new ROM supplier produced 8K ROMs with a bug, and Sinclair has stopped shipping until a supply of perfect ROMs arrives. | Sinclair ZX80 |
| Sinclair UK Unveils New Computer | Besides the new machine, Sinclair announced a reported 100K Microdrive for the end of 1982. | Sinclair ZX Spectrum |
| Sinclair ZX81 ROM Disassembly Part A: 0000H-0F54H | Ian Logan has disassembled and annotated the ZX81 Monitor, easing your access to the improved 8K ROM. | Sinclair ZX81, Timex/Sinclair 1000 |
| Sinclair-MicroAce Legal Dispute | Sinclair Research and Compshop, Ltd., (MicroAce’s English parent company) may go to court in England over their license agreement. According to Nigel Searle of Sinclair, Compshop has violated the terms of their agreement. Andy Fisher of MicroAce denies Sinclair’s charges. No word yet on the outcome and possible impact on Sinclair and MicroAce customers. | MicroAce |
| Sinclair’s 10-page technical manual … | Sinclair’s 10-page technical manual has materialized as a 4-page manual with ZX80 schematic. | Sinclair ZX80 |
| Sinclair’s Printer Shown in US | Clive Sinclair of Sinclair Research demonstrated his ZX81 printer at the the US introduction of the ZX81 computer in Boston on Oct. 7. | Sinclair ZX81, Type-in program |
| Sine Functions on 4K | Closely approximate sine functions on your 4K ROM with a few BASIC statements. | Sinclair ZX80, Type-in program |
| Sine Name | Print any string in the form of a vertical sine wave. | Sinclair ZX81, Type-in program |
| Sinking Fund | How much money do you need to save each month to have a certain sum accumulated at a certain time? That is a sinking fund calculation. | Timex/Sinclair 1000, Type-in program |
| Smart Term II Delayed | Upgraded performance for Westridge’s 2050 modem will have to wait a tad longer, but we do not know quite when. The death of Stuart Lotwin seems to have thrown the company into chaos—phone calls unreturned, information unavailable, and people answering the phone who seem not to care. | |
| Smart Term II Package in Testing | Those of you waiting for the advanced modem software should soon be able to get it for the 2050 modem. | |
| Snake | Review of the game published by Zeta Software. | Timex/Sinclair 1000 |
| Softsync Ready with TS2000 Software | Softsync says it’s ready whenever Timex is, with TS2000 software now for sale. | Timex/Sinclair 2000, Timex/Sinclair 2068 |
| SoftSync Software | Softsync offers ZX80 Invasion. | Sinclair ZX80 |
| Software Catalogs Available | Software catalogs for ZX80 and MicroAce owners available from Image Computer Products. | MicroAce, Sinclair ZX80 |
| Software Company Seeks Programmers | Pegasus Micro Systems is currently looking for programmers to write new software. | |
| Software Hint | One-line programming tip: using GOTO to a specific line number to trigger SAVE at the end of a program, enabling automatic save on program exit. | Timex/Sinclair 1000, Type-in program |
| Software Hint – TS2068 | Put TS2068 in caps mode (C cursor) with POKE 23658,8. POKE 23658,0 to reverse. | Timex/Sinclair 2068, Type-in program |
| Software Review: Computacalc and Video-Plan | Comparative review of two ZX81 spreadsheet programs: Computacalc (Mindware Co., $39.95, 16K) and Video-Plan (Video Software Ltd., UK, £9.95). Both run in BASIC and are slow. Computacalc preferred; Video-Plan has serious bugs including incorrect subtotals. | Timex/Sinclair 1000 |
| Software Review: ZXAS-ZXDB | Review of ZXAS (Z80 assembler) and ZXDB (disassembler-debugger) from Bug-Byte, distributed by Gladstone Electronics. ZXAS supports 256 labels, standard Z80 mnemonics via REM statements; ZXDB offers 10 single-key commands including breakpoint and single-step execution with register display. | Timex/Sinclair 1000 |
| Software Reviews: Moi Othello and The Fast One | Reviews of two ZX81 programs from UK publishers. Moi Othello (Mine of Information, £19 US) is an advanced Othello implementation with 9 skill levels and machine code AI. The Fast One (Campbell Systems, $30) is a general-purpose filing and reporting system with menus, record management, and sorting. | Timex/Sinclair 1000 |
| Software Tips | Tips for saving multiple copies of a program automatically using a self-repeating GOTO/SAVE loop, and for making programs auto-run after loading by embedding a GOTO to the first line within the SAVE sequence. | Timex/Sinclair 1000 |
| Solar Program for Flat Plate Collectors | If you’re using solar technology to reduce your energy bills, a computer can help maximize your benefits. SOL will help you orient that flat plate collector. | Timex/Sinclair 1000, Type-in program |
| Soldering Hints | Even if you’re not a hardware person, you can connect external devices to your computer without fear. You only need a few hints to successfully solder your ZX80. | |
| Solving Simultaneous Equations | This 8K/1K program uses Crout’s reduction to solve simultaneous equations. The number of variables you can use is limited only by your available memory; in 1K this program solves up to 4 equations in variables | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| Son of Big Characters | Print 4x size characters. | Sinclair ZX80, Type-in program |
| Sort Routine | This routine can sort 20 words of 20 characters in about 8 seconds. | Sinclair ZX81, Type-in program |
| Spaces in REM Statements | If you put your machine code in large REM statements, you need not laboriously type in spaces or digits. | Sinclair ZX81, Type-in program |
| Spectrum Machine Code on 2068 | Some Spectrum MC tapes will run on your 2068, The Fruit Machine, for example. Your chances are better if the program is written for 48K. Programs that call keyboard scan routines—as IN 64510, 61438, 32766, or 65278—will run if you change these to INKEY$ or STICK commands on your 2068. Also programs written with MC […] | Timex/Sinclair 2068 |
| Spectrum MC on 2068 | The Ocean State Users Group reports that they successfully entered and used Spectrum machine code programs from the UK magazine Your Computer. | Timex/Sinclair 2068 |
| Spectrum Shown at London ZX Fair | SYNTAX editors saw Sinclair’s Spectrum at the 3rd ZX Microfair in London (see May 82). | Sinclair ZX Spectrum |
| Speech Pack | Speech Pack gives you computer-generated speech through your ZX/TS. Speech Pack is a black box with a special processor and ROM containing words. It has three other sockets so other word ROMs can plug in. | Timex/Sinclair 1000 |
| Speech Synthesis | Voice or speech synthesizers combine hardware and software into systems that let your computer talk to you. | |
| Speed Up PRINT Lines — ZX81 | Tips for making PRINT statements execute significantly faster by adding an AT-based padding line after SCROLL operations. Demonstrates a ~47% speed improvement for short programs and dramatic gains for programs with large arrays. | Timex/Sinclair 1000, Type-in program |
| Speed Up Your Programs | Most Sinclair users are new to the programming game. Many will use lines like: 350 GO TO 710. In most cases this is fine, especially in a short program. But in a long program with many GO TO statements, the computer takes a long time for each TV display. | Sinclair ZX81, Type-in program |
| Speed VU-CALC Keying | Eliminate half second delay after each keypress in VU-Calc. | Timex/Sinclair 1000, Type-in program |
| Spelling Word Game | Program to help students learn spelling words. | Timex/Sinclair 1000, Type-in program |
| SQ-UP | John Oliger reports an error in his 64K RAM board project in Summer SQ. Schematic 1, p. 47 (MC mod), shows pins 1 & 13 tied to GND. Tie both to Vcc to make the circuit work. | |
| SQ-UP | In David Ornstein’s premier issue article (SQ Winter 82 p. 29) Using Extra Keys on Big Keyboard, add a symbol A atop the D1 lead toward the right-hand edge of the page. | Timex/Sinclair 1000 |
| Star Count | After each complete scan of the star field, you must make an estimate of the total number of stars visible on the view screen. | Sinclair ZX80, Type-in program |
| Star Hunter | In Star Hunter, you control a laser cannon. Your ship is stationary on the left side of the screen as stars move towards you. The object is to shoot a star before one of them hits the left side of the screen. | Timex/Sinclair 1000, Type-in program |
| Stop Auto-Run | Stop an auto-RUN program (a program that automatically RUNS when LOADed) before it RUNS. | Timex/Sinclair 1000, Type-in program |
| Stop Autorunning Programs | To convince the ZX/TS machine not to RUN after LOADing, we CALL the LOAD routine in machine code. | Timex/Sinclair 1000, Type-in program |
| String Function Translation for 8K | Equivalents of LEFT$, RIGHT$, MID$ and TL$. | Sinclair ZX81, Type-in program |
| Style and Speed in BASIC | When you write a BASIC program, the order in which you carry out your tasks affects the speed of your program. This routine lets you see simple examples that show how the same task can take 42 seconds at the front of a program , but 78 at the end. When you’ve seen these results, […] | Sinclair ZX81, Timex/Sinclair 2068, Type-in program |
| Subroutines — Super Step-Savers | Subroutines are mini-programs; they execute a series of steps apart from the main program. In essence, you tell the computer, “Go do those steps and then come back here and proceed with the main program.” The ZX80 remembers where it was and returns to the following line after executing the subroutine. You can call the […] | Sinclair ZX80 |
| Sun KD-81 full-size keyboard conversion for the ZX/TS | Review of the keyboard kit. | Timex/Sinclair 1000 |
| Super Joystick | Use readily available hardware to create a full-function joystick compatible with the ZX81. | Timex/Sinclair 1000 |
| Super Monzxer | This adventure game of survival challenges you with man-eating spiders, giant bats, pits and monzxers. You are in a cave with 5 levels of 20 rooms each. | Sinclair ZX81, Type-in program |
| Super ZX80 Invasion | This game creates impressive continuous graphics on the ZX80, but limited memory imposes severe limitations on convenient play. | Sinclair ZX80 |
| Superposition | Program models superposition by graphing two sinusoids, waves of constant wavelength and amplitude, and their combination. | Timex/Sinclair 1000, Type-in program |
| Surplus Keyboards Plus Directions | The $20 surplus keyboards from John J. Meshna Jr., Inc., mentioned in the Dec. 81 issue, now come with wiring instructions for ZxX80s. | Sinclair ZX81 |
| Sweethearts | Draw a heart with a valentine message in the middle. | Timex/Sinclair 1000, Type-in program |
| Syncware News Reorganizes to Continue | Thomas B. Woods will take over publication of SyncWare News as volume 2 begins. The final arrangements call for the newsletter to go to a full-size, 16-page format with spinwriter type and remain bi-monthly. Fred Nachbaur will provide technical input, and Tom Bent will take over editorial chores. | |
| Syncwars-16 | Improved version of SYNCWARS game. Runs in SLOW mode and shows more spectacular displays. Otherwise, the program plays just as the 2K version | Timex/Sinclair 1000, Type-in program |
| Syns of Omission | Corrections to programs in prior issues. | |
| Syns of Omission | Error corrections to articles in prior issues. | |
| Syntactic SUM – TS2068 | Program to calculate checksum for TS2068. | Timex/Sinclair 2068, Type-in program |
| Syntactic Sum Loader | Machine code routine to help assure correct program entry. | Sinclair ZX81, Type-in program |
| Syntactic Sums | Checksum program for programs in Syntax. | Sinclair ZX80, Type-in program |
| Syntactic Sums for Past 4K ROM Programs in Syntax ZX80 | Corrections to Cryptoquote, 12 Days of Christmas, Big Characters, Multiplication Exercise, Season’s Greetings, Compu-Calendar, Bubble Sort, Basic Salary Sched, Memory Window, Bytes to the Line, Computer Model. | |
| Syntax Buys Timex-Sinclair News | This issue, with its new banner, inaugurates the combination of Timex-Sinclair News into our publication. | |
| Syntax Error | Correction to 4K Phone Number Word Generator. | Sinclair ZX80, Type-in program |
| Syntax Error | ||
| Syntax Error | Joe Chaiet’s Bar Chart program contained an error. | Sinclair ZX80 |
| Syntax Error | To get correct Puerto Rican and Washington, DC, zip codes in ZIP-TO-STATE… (Sept. 83), delete lines 5140 and 5150 and add the following lines. Also, delete line 5110 (a repetition). | Timex/Sinclair 1000, Type-in program |
| Syntax Error | Two errors in Machine Code Print Routine. | Sinclair ZX80, Sinclair ZX81 |
| Syntax Error | Corrections to ZX80 Checkbook; Improving Display. | Sinclair ZX80 |
| Syntax Errors | Last two POKEs necessary for Expanding Existing 16K Programs. | Timex/Sinclair 1000, Type-in program |
| Syntax Errors | Correction to Banner Writer. | Timex/Sinclair 1000, Type-in program |
| Syntax Errors | Correction to Return on Investment. | Timex/Sinclair 1000 |
| Syntax Errors | Corrections to Loan Amortization and 30 Programs for the Sinclair ZX80. | Sinclair ZX80 |
| Syntax Errors | Errors with Martin Iron’s line renumbering program. | Sinclair ZX80 |
| Syntax Errors | Correction to program 1 in Recipes for Advanced Video. | Timex/Sinclair 2068 |
| Syntax Errors | Correction to Ohm’s ZXLaw. | |
| Syntax Errors | Change Firstloader’s translation table to 32 at 44125 and 14 at 44126. Some Upload tapes from E-Z Key share the error. This doesn’t affect translations, and both programs run correctly. Use a Winky Board II to load ZX/TS tapes. Connector diagrams in this issue supercede information published in SYNTAX Dec. 83. | Timex/Sinclair 2068, Type-in program |
| Syntax Errors | ||
| Syntax Errors | Using Program 1 in Frank O’Hara’s Numbers Held Inexactly, Apr.82, 1E13 gives 172 17 132 231 42. | |
| Syntax Errors | Jon Passler noticed an error in his 8K Roundoff routine (Oct. 81). | Sinclair ZX81 |
| Syntax Errors | SABRE’s address is 1718, not 1719, Autrey (Nov.81). Lance Ward’s 8K Slalom program (Dec.81) contained 1 error. | Sinclair ZX81 |
| Syntax Errors | Peter Ulrich, New York, sent corrections for Paul Ezra’s Brownian Motion program (Dec. 81). David Ornstein corrected his New 8K ROM Routine Addresses list (Jan. 82). Jon Passler sent some improvements for his 8K Bar Chart program (Jan. 82) to speed up program execution. | Sinclair ZX81 |
| Syntax Errors | Correction to Phone Number Generator (Feb 82). | |
| Syntax Errors | Error corrections for previous articles. | |
| Syntax Errors | Corrections to Printing on the Bottom Line. | |
| Syntax Errors | Correction to Machine Code Screen Fill. | |
| Syntax Errors | Corrections to Grading Program, Unit Pricer, Monthly Calendar, Hex Math. | |
| Syntax Errors | Corrections to Monthly Calendar Program, Black Box, and Hex Math. | Timex/Sinclair 1000, Type-in program |
| Syntax Errors | ||
| Syntax Errors | ||
| Syntax is not Donne, nor Browning | Syntax will continue; will publish smaller issues until ad base rebuilds. | |
| Syntax Labs Load Spectrum Software | SYNTAX tried following the LI user group’s instructions with 3 German programs from Profisoft. | Sinclair ZX Spectrum, Timex/Sinclair 2068 |
| Syntax Quarterly Debuts | Syntax Quarterly debuted at the Northeast Computer Show, Boston, in Nov. SQ offers in-depth hardware and application stories, reviews and programming techniques. Several other distributors and manufacturers of Timex Sinclair computer products exhibited. | |
| Syntax Quarterly Debuts Nov. 82 | SQ, The Syntax Quarterly, will be available by subscription and on newsstands Nov. | |
| Syntax Survey Returns Flood In | Early readings say that SYNTAX needs ZX/TS applications & utilities, for which we need submissions. | |
| Syntax ZX80 Updates Name | SYNTAX ZX80 now answers officially to its abbreviated name, SYNTAX. | |
| TAB Subroutine | Short subroutine to simulate the TAB function. | Sinclair ZX80 |
| Talk to Your ZX80 | Cognivox, produced by Voicetek of Goleta, CA, is a speech I/O peripheral for personal computers . It uses both speech recognition and vocal response, so you and your ZX80 can talk to each other. Cognivox maintains a vocabulary of up to 32 words or short phrases (requiring less than 3 seconds of speech time) and […] | Sinclair ZX80 |
| Taming Output | Techniques for formatting numeric output. | Timex/Sinclair 1000, Type-in program |
| Tape Level Indicator | Bar-graph level indicator using LM3914. | Timex/Sinclair 1000 |
| Tax Return Helper | Review of the program from KSOFT. | Timex/Sinclair 1000 |
| 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 |
| Tech Manual Shipments Slow | Timex says it’s shipping 2068 manuals, but BCS members say they haven’t gotten them, despite having ordered in May. | Timex/Sinclair 2068 |
| Technical Details for ZX Printing | Discusses how the ZX printer works. | |
| Technical Details for ZX Printing | In-depth technical reference covering the ZX printer interface: PR-BUFF signal, Z80 I/O port address (OOFBH), data bit meanings, stylus/belt mechanism, encoder disc operation, and key ROM routines (0802H-0918H). Also explains how to move the COPY routine to RAM and create custom character sets. | Timex/Sinclair 1000 |
| The Architect | This brief program produces an interesting, constantly changing display and demonstrates an interesting point about ZX/TS graphics. | Timex/Sinclair 1000, Type-in program |
| The Beginner Learns to Load | Trials and tribulations of loading. | Sinclair ZX80 |
| The Essential Guide to T/S Home Computers | This book has useful programs galore. There are exercises for you to practice on. There are games and ways to apply general programming skills to specific problems. | Timex/Sinclair 1000, Timex/Sinclair 2000, Timex/Sinclair 2068 |
| The Expandable ZX80 and ZX81 | Author offers seven documented projects and several ideas for additional projects. | Sinclair ZX80, Sinclair ZX81, Timex/Sinclair 1000 |
| The Flags of the 8K ROM Program | The ZX81 manual states that the three system variables FLAGS, FLAGX and CDFLAG hold various flags to control the BASIC system. But a study of the 8K ROM program discloses 12 separate flags. | Sinclair ZX81, Timex/Sinclair 1000 |
| The Flags Register | Part 3 of series on machine code programming. | Sinclair ZX81, Timex/Sinclair 2068 |
| The Flags Register (Part 3) | Third installment of a 12-part machine code programming series. Explains the Z80 Flags register bits (Sign, Zero, Half-carry, Parity/Overflow, Add/Subtract, Carry), with focus on the Zero flag and the combination of bit-test and branch instructions. | Sinclair ZX80, Timex/Sinclair 1000 |
| The Ins & Outs of the Timex TS/1000 and ZX81 | Review of the book by Don Thomasson. | Sinclair ZX81, Timex/Sinclair 1000 |
| The Math Program | Program that presented tailored study, using ZX80s, to those who want extra help in math. | Sinclair ZX80, Type-in program |
| The Sinclair ZX81 Programming for Real Applications | This book is aptly billed as being for people who want to get down to business with their ZX81s. | Sinclair ZX81, Timex/Sinclair 1000 |
| The T/S 2068 Explored | This book’s cover quotes Clive Sinclair: “Teaches skills of programming which, without its aid, might take years to aquire.” Those who have struggled with the lack of advanced programming information in the TS2068 manual should take note. | Timex/Sinclair 2068 |
| The Timex Sinclair Computer Made Simple and Mastering Your Timex Sinclair Personal Computer | Review of the two books. | Timex/Sinclair 1000 |
| The ZX/TS and 2716 450ns EPROMS | You may run into trouble using 450ns 2716 EPROMs on your ZX/TS. | Timex/Sinclair 1000 |
| The ZX80 Companion | Review of the book published by LINSAC. | Sinclair ZX80 |
| The ZX81 Companion | Bob Maunder’s new book is very different from The ZX80 Companion. It aims to appeal to every ZX81 owner, but more to “students” of computing whether at home or at school. | Sinclair ZX81, Timex/Sinclair 1000 |
| Three How-Tos | How to Market Your Timex/Sinclair Software; 1984 Programmer’s Market; 1983 Software Writer’s Market. | |
| Tic Tac Toe — 4K/2K | Two-player Tic Tac Toe game for the ZX80 in 4K ROM with at least 2K RAM. Player vs. computer; computer uses a mix of strategic and random moves. Checks for legal moves, detects wins, and allows replaying. Includes complete BASIC listing. | Sinclair ZX80, Type-in program |
| Timex 800 Number Still Active | Timex says you can still buy 2068s and software from them via their 800 number. | Timex/Sinclair 2068 |
| Timex at the Heart of the Kidney | TS1000 plus peripherals can make life easier and less expensive for artificial kidney patients and US taxpayers. Artificial kidneys used by dialysis patients cost $20-50 each and patients can use each only once. Each kidney patient must dialyze, using a new kidney, three times a week. Medicare, through our tax dollars, bears 80% of this […] | Timex/Sinclair 1000 |
| Timex Makes Medical Waves | Medical science utilizes T/S power in a joint venture between MIT and Harvard Medical School, according to Stephen Burns, technical director of MIT’s Biomedical Engineering Center. | Timex/Sinclair 1000 |
| Timex Printer and Modem Info | Timex’s 40-column thermal printer will be available in Dec.82 for $99.95, says Timex VP Danny Ross. Despite its 40-column format, it LLISTs in screen format (32-col). Ross also said Timex’s new 300-baud modem will be ready first quarter of ’83. | |
| Timex Printers on Their Way | Timex printers are en route to distributors, according to a Timex source, and should be in retail stores in March. | |
| Timex Releases 2068 Manual | Just at press time, Timex began to deliver copies of its comprehensive technical manual for the 2068 computers. Every owner should buy this book — if you don’t need it, you add to the resale value of your machine with the extensive documentation provided. Those of you trying to locate or decipher ROM routines will […] | Timex/Sinclair 2068 |
| Timex Says No Deal | Timex says no proposal has been received to take over retail sales of their computers. Judging from newspaper ads, they continue to sell off inventory via mail and phone. | |
| Timex Shows New Peripherals | Timex displayed new products at the 1984 Consumer Electronics Show in Las Vegas. | |
| Timex Shows T-Dock and Cartridge Adaptor | Cartridge software for TS1000/1500 owners will be available by using a $19.95 T-Dock to feed buss signals through and connect the ROM plug-in—which uses chip-on-board technology. | Timex/Sinclair 1000, Timex/Sinclair 1500 |
| Timex Sinclair 1000 | Timex, the watch company that has always built Sinclair computers, will market and distribute Sinclair-based products in North and Central America and the Carribean beginning this year. Note the new name — Timex-Sinclair 1000. This computer is a virtual twin to the ZX81, except for an extra 1K RAM under the hood (2K total). Watch […] | Sinclair ZX81, Timex/Sinclair 1000 |
| Timex Sinclair Celebration in Boston | To commemorate their 2nd year, the Boston Computer Society’s 800-member Sinclair Timex User Group will bring together TS owners, user group reps from all over and hardware, software, publication and service vendors for a day-long show and workshops. | |
| Timex Sinclair User Restructuring | Organization of ECC’s North American magazine will be restructured, according to observers close to the scene, but no decision has been taken to stop printing. Changes will delay issue 8, for which ECC apologizes. | |
| Timex Slashes Price | Timex lowered their TS1000 price to $69.95 and extended the $15 rebate deadline to April 30. The TS2000 release date is slated for the second quarter but most observers agree this is optimistic. | Timex/Sinclair 1000, Timex/Sinclair 2000 |
| Timex Tech Manuals Shipped | Timex shipped its initial stock of photocopied 2068 Tech Manuals and has orders for its scheduled print run. | Timex/Sinclair 2068 |
| Timex to Market SR Products in North America | Sinclair just announced a license with Timex to manufacture and retail Sinclair computers, peripherals and software via Timex outlets in N. America. | |
| Timex to Offer TS2068 Technical Information | Timex Technical Memos 1-9 and the 3rd Party Software Guide will be amended, correct and distributed. | Timex/Sinclair 2068 |
| Timex to Sell Replacement Parts for TS1000 | You will be able to get Timex replacement parts for your TS1000 sometime this spring. Timex repair facility will sell parts and schematics. | Timex/Sinclair 1000 |
| Timex: 16K TS2000 Scrapped; Software Deals | Timex will produce only 48K RAM versions of the TS2000, called the TS2068, says Timex spokesman Carl Folta. The $199 TS2068 will experience further delays, with release now set for the middle of September. | Timex/Sinclair 2000, Timex/Sinclair 2068 |
| Title Framing and Centering | You can dress up displays by adding the following listing to the beginning of your programs. | Timex/Sinclair 1000, Type-in program |
| Tone Generator | Generate tones on your ZX/TS by building this circuit and using a machine code routine with it connected. | Timex/Sinclair 1000, Type-in program |
| Towers of Hanoi | This program demonstrates the use and manipulation of a 3-dimensional string array, N$(R,C,9), by tracking occupancy with a numeric array, P(R,C). The program runs in slow mode; you can see blocks move. | Timex/Sinclair 1000, Timex/Sinclair 2068, Type-in program |
| Translating BASICs — What Won’t Work | With all the software available for other computers, many ZX80 owners want to convert programs from Microsoft BASIC (used in PETs, Apples, and TRS-80s) to ZX80 BASIC. Sometimes this proves futile due to inconsistencies between Microsoft and ZX80 BASIC. | Sinclair ZX80 |
| Translating Programs: On … Go To | Techniques for translating programs from other BASICs. | Sinclair ZX81 |
| Translating Programs: ON…GO TO | Tutorial explaining how to translate ON…GOTO and ON…GOSUB constructs (not supported by ZX81 BASIC) into equivalent ZX81 BASIC, presenting three methods: using a list, computed line numbers, and DIM array indexing. | Timex/Sinclair 1000 |
| Travel Package to London ZX Show | Mindware Co. is sponsoring a travel package to the ZX80/81 Micro Fair show in London. Leaving Jan. 28 from Logan airport in Boston and returning Feb.1, the trip costs $439 per person ($489 single occupancy). | |
| Trouble-shooting Your MicroAce | You’ve put together your MicroAce and examined the PC board solder connections — everything looks good. Power up — you get a white screen and no cursor. What do you do now? Here is a chart compiled by removing each IC chip from a working MicroAce and observing the effect. It may provide you with […] | MicroAce |
| TS User NL (Yagsee) Folds | Yagsee Publications stopped producing TS User newsletter with the Apr. 84 issue. According to Derek Stubbs, Timex’s exit, followed by others, left a market without new customers as old ones moved to other machines. Renewals and subscriptions dropped, and Yagsee’s informal survey projected poor financial performance. | |
| TS1000 in Canada This June | Timex Canada plans to market TS1000s sometime in June, with customer sales starting in late June or early July. The company projects an initial 100,000 unit release, says a Timex spokesperson. | Timex/Sinclair 1000 |
| TS1000 Service Center and Computer Hotline | Contact information for both. | Timex/Sinclair 1000 |
| TS1000 Test and Review | Syntax purchased and tested the TS1000. | Timex/Sinclair 1000 |
| TS1500 RAM Trouble | Industry sources inform SYNTAX that testing of several RAMs—Memotech, Byte-Back, Gladstone, Persona, and D’ktronics—shows they will not work with current TS1500 demos. | Timex/Sinclair 1500 |
| TS1500, Modem Delays | Timex manufacturing chief Carlos Dragovich says Timex now plans late August releases of both TS1500 and TS2000 models. Timex said last month it planned July sales for TS1500s, and August sales for TS2000s. | Timex/Sinclair 1500, Timex/Sinclair 2000, Timex/Sinclair 2068 |
| TS2068 Connector Pinouts | This information, from TIMEX Technical Memo #6, is supplied by TIMEX for publication by SYNTAX. | Timex/Sinclair 2068 |
| TS2068 Device Independent Input/Output | Redirect input/output to other devices. | Timex/Sinclair 2068, Type-in program |
| TS2068 Personal Computer Technical Reference Manual | If you need to know about how the CPU, ROM, RAM, sound chip, joysticks, keyboard, display hardware, cassette ports, or any other facet of the hardware works, or you need pinouts for any of the connectors inside or outside, or you need to understand how the ROM cartridge software gets loaded, or how the operating […] | Timex/Sinclair 2068 |
| TS2068 Port Assignments | Timex provided SYNTAX with the following chart, referred to on page 214 of your 2068 manual. This chart is what you would receive if you contacted Timex Corporation for port assignments. | Timex/Sinclair 2068 |
| TS2068 Specifications | Preliminary specifications on the computer. | Timex/Sinclair 2068 |
| TS2068 Update | TS2068s may grace your mailboxes by the end of September. Timex says Reagan’s FCC cuts delayed approval. | Timex/Sinclair 2068 |
| TSTIS Products Catalog | Timex/Sinclair Training Information Service sells this cassette not as a program so much as a catalog: each biweekly update lists over 180 different books, software, and hardware packages from major TS2068 suppliers. | Timex/Sinclair 2068 |
| TV Sync Solution | Dim lines and horizontal distortion moving up or down the screen are signs of the computer not syncing with horizontal sweep. | Sinclair ZX81 |
| TV, Recorder Recommendations | Advice for TVs and tape recorders. | |
| Two Inexpensive Power Backup Supplies | Both SVR-2 and UPS-1 prevent power loss from transients or total power failure. | |
| Two Numbers in One Byte | Storing two integers (0-15 range) in one byte. | Timex/Sinclair 1000, Type-in program |
| 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 |
| UK Products Listing | Want to know first-hand what’s happening with British ZX hardware, software and publications? We have a limited number of official show guides from the 3rd ZX Microfair, held 30 April-1 May in London. | |
| UK Source for Spectrum Manuals and Parts | Bob Dyl of the Ocean State Users Group in RI tells us that you can get manuals and repair parts for the ZX Spectrum. | Sinclair ZX Spectrum |
| UM-64 Memory Module | Using bigger memories creates opportunities for greater losses in a crash. Byte-Back’s battery-back-up scheme cuts this risk. You’ll also get the possibility to have your operating system in RAM (all but the characters), compatibility with the TS1500, switch-selectable banks in the 8-16K area, an EPROM socket you can switch-select into 8-16K, and reasonable documentation from […] | Sinclair ZX81, Timex/Sinclair 1000 |
| Unit Pricer | Program calculates the unit price of two similar products. | Timex/Sinclair 1000, Type-in program |
| Unjumble Word Games | Program unscrambles any word. | Timex/Sinclair 1000, Type-in program |
| Upcoming Shows and Exhibitions | ||
| User Friendly Legal Advice | Copyright as a tool to prevent piracy. | |
| User Friendly Legal Advice, Part II | Should you sell or license your program? | |
| User Report: Insight’s 16K RAM Pack | At first glance you might ask, “Is that all there is to it?” I opened the shipping box to find a small black plastic case that obviously plugs into the rear of a ZX80/81 or MicroAce computer. | Sinclair ZX81, Timex/Sinclair 1000 |
| Users’ Groups | ||
| Users’ Groups | Listing of newly formed ZX80/81 user groups in Los Angeles CA, San Francisco/San Jose CA, Seattle/Tacoma/Everett WA (Dan Gallery), Denver CO, Fort Wayne IN, Lynchburg VA, Central Pennsylvania, and New York NY. | |
| Users’ Groups | Listing of ZX80/81 user groups, including Seattle (Sinclair Program Exchange), Pacifica CA, Pomona CA, Houston TX, Idaho Falls ID, Prince County MD (ham radio group), Tampa Bay FL, and Merritt Island FL. | |
| Users’ Groups | Listing of recently heard-from ZX80/81 user groups in Central Virginia, Pittsburgh PA, North Suncoast FL, Atlanta GA, Milwaukee WI, Chattanooga TN, and San Diego CA. Includes Gladstone Electronics contact for the Toronto area. | |
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| Using Extra Keys on Big Keyboard | Additional logic to implement shifted keys. | Sinclair ZX80, Type-in program |
| Using the 8K ROM, 16K RAM on MicroAces | According to Andy Fisher of MicroAce, Sinclair’s 8K ROM and 16K RAM pack are completely compatible with MicroAce machines with minor modifications. | MicroAce |
| VAL$ on Your 2068 | This feature demonstrated is one of the subtleties implied by the statement “Sinclair machines always call the expression evaluator”, and plays a role in the sometimes odd report codes that result from failures at intermediate steps. | Timex/Sinclair 2068, Type-in program |
| Vendor Report | Starburst Software has changed its name to Vessellware. | |
| Vendor Report | E-Z Key (711 S. Artery Suite 75, Quincy, MA 02169 617/773-1187) and Knighted Computers (707 Highland St., Fulton, NY 13069 315/593-8219) now have modems (that would have been TS2050’s) available for $119, including Smart I terminal software on cassette and a free membership in the Source. As mentioned in SYNTAX Apr. 84, T.E.J. Computer Products […] | |
| Vendor Report | Updates on Biocal Software, Knighted Computers. | |
| Vendor Report | Timex will not produce the 2060 Interface, 2065 Microdrive or 2080 printer. Hawg Wild, Tom Woods, Simulsion and Quicksilva will continue support. | |
| Vendor Report | Updates about Frog Software, Sinclair Computing, Mindware, Pegasus Microsystems, Memotech, C-20 Magazine, Starburst Software, Kopak. | |
| Vendor Report | Updates from Synergistic Designs, E. Arthur Brown, G. Russell Electronics; about Timex Sinclair User and KOPAK. | |
| Vendor Report | PleasanTrees Programming continues to supply ZX/TS software and will introduce new 2068 titles. They are closing out the last copies of “Graphics A to Z,” see classifieds, this issue. You can get it later, but photocopied & 50% more costly. Our report from Canada proved sadly true: Gladstone’s Toronto store sold copied software that Games […] | |
| Vendor Report | Byte-Back has nearly cleared up its backlog of 2068 modem orders; Ray Kingsley of Sinware believes that some of you may have purchased bootleg copies of an early version of HOT-Z with a bug in it; allegation of Gladstone copying software. | Timex/Sinclair 2068 |
| Vendor Report | Updates from/about Proprietary International, Norris Electronics, SMUG, Gladstone Electronics. | |
| Vendor Report | Updates from Sinclair Midwest Users Group re SMUG software; Norris Electronics; Aerco backlog; Gladstone shipping current stock; M-Coder does not work as advertised. | |
| Vendor Report | Memotech reports only RAM packs are incompatible with TS1500; Radio Shack printers work poorly with Memotech interface; EZ-Loader contains a bug; TS2040 printers slow buss timing; HES no longer supporting ZX/TS. | |
| Vendor Report and Notes | Norris Electronics is out of business; Byte-Back memory units might not work with TS2040 printer. Frog Software is distributing May-June issue of Sinclair Computing. | |
| Vendor Report and notes | Bob Berch changed his business name to Cinagro Software; DJM is now Starburst Software. | |
| Vendor Report and Notes | Updates from Barlog Software, Tom Woods, Biocal, Quicksilva, Memotech. | |
| Vendor Report and Notes | Updates from John Oliger, Timex. | |
| Vendor Reports and Notes | Frog Software appears to have disappeared; Brainchild backordered on Kolorworks; Memotech RS232 not in stock; first issue of Ramblings out. | |
| Vendor Reports and Notes | Updates from Brainchild, Kopak, Paul Hunter. | |
| Video Artist | Timex/Sinclair 1000, Type-in program | |
| Video Artist — 8K/2K | BASIC drawing program with real-time cursor control using keys 5-8, supporting both plot and edit modes with the ability to save artwork to tape. Runs in 2K RAM. | Timex/Sinclair 1000, Type-in program |
| Video Artist Modification | Modified version of Lance Ward’s Video Artist drawing program (published v3n3), compressed to 1K RAM by using common integers, eliminating redundant lines, adding ABS function to prevent plotting reversal, adding boundary error prevention, and adding picture titling. | Timex/Sinclair 1000, Type-in program |
| Video Display Notes | Article describes the gut workings of the MicroAce/ZX80 video display. | MicroAce, Sinclair ZX80 |
| 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 |
| Video-Plan, Computacalc | Review of two spreadsheet programs. | Timex/Sinclair 1000 |
| Videograph | Editor for user defined graphics characters. Edit four characters at a time on a 16×16 grid. | Timex/Sinclair 2068, Type-in program |
| Visibell | Reverses every character on the screen. | Timex/Sinclair 1000, Type-in program |
| VOTEM interface board | VOTEM stands for voltage and temperature, and that’s what this new interface from Down East Computers is all about. | Timex/Sinclair 1000 |
| VU-CALC | Only the name of this program resembles the ZX/TS VU-CALC. This version occupies 37K when resident without any data. Due to its design, large tables use very little additional memory. | Timex/Sinclair 2068 |
| Wanted: Assembly Language Programmers | Proprietary International needs assembly language programmers for their unreleased ZT21000. | |
| We-They Scorepad | Keeps score for two-person or two-team games. | Timex/Sinclair 1000, Type-in program |
| Westridge 2050 Modem | This product would have been the TS2050 Modem if Timex had sold it. | Timex/Sinclair 2068 |
| What Does This Program Do | Flash screen by switching between FAST and SLOW. | Timex/Sinclair 1000, Type-in program |
| When You Forget Syntactic Sum | Short routine to calculate the sum when you’ve forgotten to load the program. | Timex/Sinclair 1000, Type-in program |
| When Your Computer Gets Full | Techniques for saving on memory. | Timex/Sinclair 1000 |
| Where to Move RAMTOP? | Many programs that put machine code routines above RAMTOP tell you to lower RAMTOP first. This program calculates just what decimal numbers to POKE to put RAMTOP where you want it. | Timex/Sinclair 1000, Type-in program |
| Will Jackintosh Jump on QL? | Sinclair QL | |
| Winky Board II | Winky Board’s designer bills it as a tape sound conditioner that lets you save bad tapes and copy any ZX/TS tapes, but Winky copies better than it saves. | Timex/Sinclair 1000 |
| Winter Consumer Electronics Show Report | Timex’s TS2040 thermal printer will hit the stores this quarter. Timex will deliver TS2000S, the US version of the ZX Spectrum, during 2nd quarter 1983. | Timex/Sinclair 2000 |
| Wish I Were, Wish I Might | Timex and Dave Higgenbottom exchanged letters preliminary to deciding the terms on which they may want to talk. As of this writing, no negotiations or talks are taking place. Unofficially, we understand negotiations will be publicly announced if they actually come to pass. Right now, the field remains open. | |
| Writing Game Programs | How do you start writing game programs? | Sinclair ZX80, Type-in program |
| Your Timex Sinclair 1000 and ZX81 | Review of the book by Douglas Hergert. | Sinclair ZX81, Timex/Sinclair 1000 |
| Zebra Light Pen | Zebra’s pen consists of a wand about 6″ long with photocell assembly. It plugs into a board containing input jacks for the pen and ZX/TS 9V power supply, output plugs to power your computer and send the pen’s signal to the EAR port, and hardware to condition the pen’s output. | Timex/Sinclair 1000 |
| Zeta Software | MCD Name Changer. | Sinclair ZX81, Type-in program |
| ZETAPAK #3, SciFi Fantasy | Review of the games from Zeta Software. | Timex/Sinclair 1000 |
| Ziff Davis Loses SYNC – Picture Unclear | SYNC magazine ceased publishing with the March/April 1984 issue. At the time, it served nearly 40,000 subscribers. | |
| Zilog Policy Change | Zilog manuals are free from the manufacturer. | |
| ZIP-to-State, State-to-ZIP | Technique we used at SYNTAX to make sure our zip and state match in our mailing list. | Timex/Sinclair 1000, Type-in program |
| ZX PRO/FILE | ZX PRO/FILE uses one of the most sophisticated and efficient data storage and retrieval systems I ever expect to see for the ZX/TS. | Timex/Sinclair 1000 |
| ZX Scramble | Review of the game from International Publishing & Software. | Timex/Sinclair 1000 |
| ZX Spectrum Sold In China | Sinclair Research, Ltd. will sell 600 48K Spectrum computers to the computing and automation department of China’s North East Technical College. | |
| ZX/TS Looks for Trapped Minds | Clover Bottom Developmental Center, a state facility for the mentally retarded, uses the ZX/TS to collect real-time data and, at the end of each session, to analyze the data. | Timex/Sinclair 1000 |
| ZX/TS RAM Pseudo Disk | If you have a 64K RAM on your ZX/TS, you can recover from crashes by periodically saving your work in high memory, as a snapshot of your current 16K environment. You need a reset button (a momentary contact normally open pushbutton between edge connector pins 21A and 4B, with a 10 ohm 1/4 watt series […] | Timex/Sinclair 1000, Type-in program |
| ZX/TS Related Books in Print Available in the United States | Timex/Sinclair 1000, Timex/Sinclair 2068 | |
| ZX/TS Related Companies Still Actively Supporting Timex/Sinclair Computers | List of companies with contact information that support Timex/Sinclair computers after exist of Timex. | |
| ZX/TS Subset of 2068 Pins | Aligned with the slot, you will find the pins correspond exactly to the ZX/TS pinout with three exceptions. RAM CS, ROM CS, and 9V are missing and the corresponding pins are empty. Pins outside the ZX/TS connector span perform 2068 functions—GND appears on 4 more pins (30 & 32, top & bottom) and +15V on […] | Timex/Sinclair 2068 |
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| ZX/TS Weather Forecast | Forecast tomorrow’s weather, and calculate actual temperatures based on wind chill and humidity readings with this easy-to-use program. | Timex/Sinclair 1000, Type-in program |
| ZX80 and MicroAce Bus Pinout | MicroAce, Sinclair ZX80 | |
| ZX80 Budget | Can keep track of expenses. As written, program keeps addition totals on 18 accounts. | Sinclair ZX80, Type-in program |
| ZX80 Check Book | Program records up to 10 transactions at a time. Keep them on file by storing the program with the variables intact. | Sinclair ZX80, Sinclair ZX81, Type-in program |
| ZX80 Double Breakout | Review of the game from Softsync. | Sinclair ZX80 |
| ZX80 Pocketbook | THE ZX80 P0CKETB00K is now available from SYNTAX. | Sinclair ZX80 |
| ZX80 Prestel Model | Model of the British Prestel data base tree structure. It can be used with your own data for display to show how Prestel data is accessed. | Sinclair ZX80, Type-in program |
| ZX80 Table | Constructs number tables with columns lined up. | Sinclair ZX80, Type-in program |
| ZX80/ZX81 Users Club | The ZX80/ZX81 Users Club in Surrey, England serves all users, beginner to expert. | Sinclair ZX80, Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81 – The New Standard | For only $149, you now get 8K BASIC, continuous display, the choice of channel 2 or 3 and a newly styled case. | Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81 and 16K RAM Schematics | A new company, Heuristics, is the exclusive distributor of ZX81 and 16K RAM pack schematics. They also plan ZX81 hardware and software. | Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81 Basic Book | Review of the book by Robin Norman. | Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81 Calculator | Use the Sinclair’s expression evaluator to make a calculator. | Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| ZX81 Home Computer Package | Lamo-Lem’s Home Computer Package of 4 machine code programs offer a good variety. | Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81 Intro | Subroutine for use at the beginning of user-friendly programs. | Sinclair ZX80, Sinclair ZX81, Timex/Sinclair 1000, Type-in program |
| ZX81 Keyboard from Memotech | The keyboard duplicates Sinclair’s keyboard, but with full-travel keys and an extra shift key in the top right corner. | Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81 Logic Signals | Reference signal levels for troubleshooting. | Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81, Sinclair Printer News | Sinclair has submitted the ZX81 to the FCC for approval for sale in the US. Nigel Searle of Sinclair expects to ship American ZX81s this year, maybe September. | Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81/Timex Programming in BASIC & Machine Language | Takes up where your ZX/TS manual leaves off; the book assumes you know the basics of ZX/TS hardware and software. | Sinclair ZX81, Timex/Sinclair 1000 |
| ZX84 In the Works | Sinclair Research plans in mid-1984 to introduce the ZX84, a new microcomputer using Sinclair’s flat 8″ CRT and microdrives. | |
| ZX99 Tape Control System | Review of the system available from data-assette. | Timex/Sinclair 1000 |
| ZXDIS Disassembler | Review of the program Scientific Software. | Timex/Sinclair 1000 |
| ZXLR8 Fast SAVE/LOAD System | ZXLR8, a versatile and reliable fast SAVE/LOAD cassette storage system, not only quickly SAVES programs, but also arrays, graphics and binary data (machine code). | Timex/Sinclair 1000 |
| ZXMAN | Review of the program from Atto-Soft. | Timex/Sinclair 1000 |
Last updated: December 31, 2023