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| \ I I /\ j £ Serving Timex-Sinclair 
| I I Personal Computers 

A PUBLICATION OF THE HARVARD GROUP 

VOL - 4 NO. 6_ ISSN 0273-2696 JUN., 1983 


IN THIS ISSUE 


COLOR TS2000, 16K TS1500, MODEM THIS SUMMER 


8K Programs 

Checkers for Two.8 

Design.14 

Egg Timer.14 

Letter Train.16 

Book Review 
Your Timex Sinclair 

1000 and ZX81 .10 

Classified Ads.21 

Dear Editor.12 

Defining Functions 

on the ZX/TS.6 

Disable Auto-List.7 

LPRINT Bug Bypass 

for TS2040.4 

LOADing ZX/TS-ZX/TS_20 

MC Video Invert.21 

New Features 1500/2000..8 
New Products 

and Services.2 

News.1 

Program Improvements.... 4 
Software Review 

Frogger.17 

Syntax Errors.4 

Users' Groups.4 

Vendor Report .16 


Index of Advertisers 


Byte-Back.8 

Discount Software.9 

E-Z Key.20 

Expense Cutters.21 

Ganhart/Ear things.16 

Hawg Wild.17 

Kopak.11 

Melbourne House.6 

Memotech Corp.18 

Pegasus Micro Systems..10 

People's Computer.20 

Suntronics.5 


Timex Sinclair User....15 


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 ca¬ 
pabilities and bank-switching. With bank¬ 
switching the computer can potentially use up 
to 256 blocks of 64K memory one at a time. 
Color capabilities include an eight-color 
range, flash command and brightness control. 
Sound broadcasts in an eight-octave scale. 

Users can individually address 256 hori¬ 
zontal and 192 vertical dots that provide 
high resolution graphics. The TS2000 fea¬ 
tures a display area of 24 lines with up to 
64 characters and allows monitor connections. 

Other features include a built-in time 
clock, moveable keys, upper and lower case 
letters, repeat feature on all 40 keys, and 
instant-load software cartridges that plug 
into the computer, at $12.95 to $29.95 each. 
TS2000S will run ZX Spectrum cassettes. 

Sales of $79.95 16K TS1500S with move- 
able keys will begin in July with compatible 
modems and software cartridges available in 
August. Existing Timex peripherals will run 
with both new computers. TS1500S will sell 
with a rewritten, user-friendly manual, says 
Timex' Sue Mahoney. 

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 Canada says it also 
plans a Canadian nationwide toll-free Sin¬ 
clair information line sometime in June and a 
newsletter similar 'to US Timex' Ramblinas . 

MEMOPAK-TS 2040 CURE—SEE PAGE 17 


1 






























NEW PRODUCTS AND SERVICES 


Secrets of Better BASIC by Ernest 
Mau offers programming, debugging 
methods, contains five appendices 
of BASIC information. $14.95. Mi ¬ 
crocomputers Can Be Kid Stuff by 
Anna Mae Walsh teaches kids BASIC, 
Pilot, games, problem solving. Pbk, 
$8.95. (Books do not use Sinclair 
BASIC.) Hayden Book Co., 50 Essex 
St, Rochelle Park, NJ 07662. 

MY TYPE teaches touch typing on 
your Big ZX81 Keyboard. Mistakes, 
WPM listed at end of each lesson. 

$8 per 16K tape. Daydesign, 790 
E. Big Beaver Rd., Troy, MI 48084, 
313/528-0469. 

COMPUWIZ SOFTWARE offers discount 
for new customers—3 tapes with 8 
games for $12 plus $2 P&H until 
Dec., CA residents add 6.5% tax. 
COMPUWIZ SOFTWARE, POB 390078, Mt. 
View, CA 94039. 

UCLA Extension offers Introduction 
to Computer Programming with the 
Timex 1000 . a course for adults 
with no programming background, by 
Roger Palmer, UCLA School of Libra¬ 
ry and Information Science. Course 
notes from CIBBARELLI, 11684 Ventu¬ 
ra Blvd., Suite 295, Studio City, 

CA 91604, 213/760-8110. 

Free to teachers— TEC News , a quar¬ 
terly newsletter for Timex educa¬ 
tional applications. Includes get¬ 
ting started, teacher reports, les¬ 
son plans, programming tips. From 
TS Educators User Grp., Texas Wes¬ 
leyan College and Timex Computer 
Corp. M. Mark Wasicsko, Associate 
Dean, School of Education, TWC, Ft. 
Worth, TX 76105. 

Hi-Res Printer Graphics 16K tape 
uses machine code routines to print 
high resolution graphic plots of 
192x256 pixels. High speed line 
drawing routine and demonstration 
programs. $10 PP. G. Russell, RD 
1 Box 539, Centre Hall, PA 16828. 

I 


TAX BREAKS FOR COMPUTER BUYERS by 
Vernon Jacobs, CPA, gives info on 
how to deduct up to $5,000 yearly 
for computer use in business, in¬ 
vestment management, program devel¬ 
opment, some personal uses. 26- 
pages, $9. Research Press, Box 
8137-P, Prairie Village, KS 66208. 

Universal Software Market Identi¬ 
fier, an international software 
product registration system, iden¬ 
tifies software publisher, software 
package, computer model, minimum 
hardware configuration. USMI Mar¬ 
ket Directory with listings dis¬ 
tributed to software dealers. Soft¬ 
ware publishers listed free. Up¬ 
dated bimonthly. Technique Learn¬ 
ing, 40 Cedar St., Dobbs Ferry, NY 
10522, 914/693-8100. 

SofTec offers three computer-aided 
design programs to automatically 
calculate component and circuit 
values for amplifier and power sup¬ 
ply configurations. All CAD pro¬ 
grams in BASIC. $10.95 amplifier 
CAD, $12.95 power supply CAD. Sof¬ 
Tec, POB 432, Fairport, NY 14450. 
Send SASE for free brochure. 

DJM Software Grand Opening offer, 
Graphit! Pie Chart Generator 16K 
$9.95, 16K and Memopak HRG $14.95. 
Each $5 off regular price. Opening 
June 15. Orders must be postmarked 
by July 15. DJM Software Co., 2214 
Horine Road, Festus, MO 63028. 

1983 Software Writer's Market by 
Christine Leu contains information 
on selling software and books for 
Timex Sinclair markets. Lists pub¬ 
lishers, shows, distributors, manu¬ 
facturers. $19.95, $2 P&H, Kern 
Publications, 190 Duck Hill Rd., 

POB 1029, Duxbury, MA 02332. 

SIFT, Statistical Interactive Sys¬ 
tem For the TS1000 and ZX81, in¬ 
cludes statistical routines such as 
linear regression, T-tests, analy¬ 
sis of variance. $25. COMPUCRAFT, 
POB 149, Hinsdale, NH 03451. 


2 


Avoid losing programs during crash¬ 
es with Flexible Ribbon. Stops 
movement between computer and RAM 
pack during white-outs or crashes. 
Comes with six inch ribbon and two 
connectors. $15, DK'Tronics, Unit 
2, Shire Hill Industrial Estate, 
Saffron Walden, Essex CBll 3AQ, UK. 

Computer Control Center work sta¬ 
tion eliminates cable clutter, pro¬ 
vides sleek, professional look to 
computer area. Holds RAM packs, 
tapes, 13" screen. 20"xl4 1/2". 
$29.95. TIMEWORKS, 405 Lake Cook 
Rd., Bldg. A, Deerfield, IL 60015, 
312/291-9200. 

Sinclair Full Travel Keyboard with 
high quality keyswitching. $54.81. 
Bulk order discounts over 25. Top- 
tronics, 4018-A W. Chandler Ave., 
Santa Ana, CA 92704. 

User group discounts on printers, 
paper, ribbons. Call collect with 
user group name for special buying 
status. Midwest Micro-Peripherals, 
119 S. Springfield, St. Paris, OH 
43072, 513/663-5488. 

BUY-PHONE electronic yellow pages, 
free videotext service for West Los 
Angeles area. Contains over 10,000 
listings of products, services, en¬ 
tertainment. BUY-PHONE, POB 29307, 
Los Angeles, CA 90027, 213/279- 
1074. Access number 213/474-0270. 

Heart of Texas Computer Show, Sept. 
16-18, includes Sinclair products, 
emphasis on small business systems, 
educational applications and medi¬ 
cal office use. Bud Houston, Heart 
of Texas, POB 12094, San Antonio, 

TX 78212, 512/226-4636. 

Music/Sounds Package includes in¬ 
structions for broadcasting music 
and spaceship noises to a nearby 
radio. No hardware mods required. 
Controls ZX/TS RF interference. 

Five BASIC program listings $3. 
Florida Creations, Dept. P, Box 
16422, Jacksonville, FL 32245. 


Hand-held DBH Converter easily con¬ 
verts dec, hex and binary, ho need 
to load a program. $3.50 assem¬ 
bled, includes P&H. Rois Harder, 
995 Shakespeare Ave, N. Vancouver, 
BC, Canada V7K 1E7, 604/980-4167. 

Computer Show & Office Equipment 
Expositions, includes 4-hr. seminar 
using TS1000, $89.95 for seminar 
and TS1000. Mid-Atlantic, Wash¬ 
ington Convention Center, Wash. DC, 
Oct. 27-30; Southeast, Civic Cen¬ 
ter, Atlanta, GA, Dec. 8-11. Com¬ 
puter Expositions, POB 3315, Anna¬ 
polis, MD 21403, 800/368-2066, 800/ 
492-0192 in MD. 

Increase your ZX/TS library—join 
an exchange club, find a Compu-Pal 
to share ideas. ZX/TS Software 
Exchange Club, Box 5021, Suite 100, 
Spring Hill, FL 33526. Send large 
SASE for prompt reply. 

BUSYNESS, a new magazine for busi¬ 
ness/professional TS users. Sub¬ 
scribers, new products, reviews 
needed. Shaun Ralston, Busyness, 
POB 421773, San Francisco, CA 
94101, 415/861-7741. 

ONLINE '83 conference for database 
users. Palmer House, Chicago, Oct. 
10-12. Jean-Paul Emard, Online, 
Inc., 11 Tannery Ln., Weston, CT 
06883, 203/227-8466. 

Four fast-action 16K MC games, NFLX 
Football, Storm Lander, Miner's 
Revenge, Super Slide. $9.95 each, 
includes P&H. SyncWare, POB 5177, 
El Monte, CA 91734. 

Save $100 from Memotech when you 
order any product and printer pack¬ 
age together. Memotech Corp., 7550 
W. Yale Ave., Denver, CO 80227, 
800/662-0949. Until June 30 only. 

MAA, Multi-Attribute Analysis, a 
decision aid to help make complex 
decisions, $19.95, $2 P&H, Stuart 
Software, 25381-G Alicia Pky, Suite 
316, Laguna Hills, CA 92653. 


3 




SYNTAX ERRORS 


PROGRAM IMPROVEMENTS 


Add line 250 COPY to BANNER WRITER 
(May83) to send message to printer. 

The correct address for QZX news¬ 
letter from the Sinclair Amateur 
Radio Users' Group (Dec.82) is: 

Alex Burr, K5XY, Box 3D, Physics 
Dept., New Mexico State University, 
Las Cruces, NM 88003. 

LPRINT BUG BYPASS FOR TS2040 

LPRINT prints some wrongprint 
on the TS2040, due to an 8K ROM 
problem. SYNTAX (Dear Editor, May 
83) describes a hardware solution. 
We found a way to bypass the bug 
with a simple programming trick. 

In this demo program, lines 20-40 
print the error, 0.0XYZ1. Lines 50 
-60 avoid this error to get the 
correct printout, 0.0001. 



Use this two-line procedure 
for any number from 0.01-0.00001: 
Assign the expression to STR$, then 
LPRINT the string. 

STR$ does not always work with 
other string functions used with 
LPRINT. These five LPRINT commands 
print the wrong results or give 
incorrect error messages: 

LPRINT (STR$ 100)(2) gives 100 
(should be 0, gives error code 3). 
LPRINT LEN STR$ 10 gives 100 
(should be 2). 

LPRINT STR$ 100 AND 0 gives 100 
(should be blank line). 

LPRINT VAL STR$ 100 gives 100 
(correct but stops with error C). 
LPRINT CODE STR$ 100 gives 1000 
(should be 29). 

ZX Users Group of New York, NYC 


Avoid confusion between the 
variable LEN and function LEN in 
lines 30 and 50 of BANNER WRITER 
(May 83) with these two steps: 
DELETE line 30 and EDIT line 50 to 
read FOR L=1 TO LEN M$. (Use the 
LEN function on the K key.) 

Robert L. Doud, Woodland, CA 

ZX/TS USERS' GROUPS 

Check our latest list of new user's 
groups to find one in your area. 

To check for a local group that's 
not listed, or to announce a new 
group, call 617/456-3661 or write 
SYNTAX, RD 2, Box 457, Harvard, MA 
01451. Send SASE if requesting 
name of group in your area. 

Montreal: Montreal Area Users 

Club, Serge Montmarquette, 509 
Notre-Dame, Joliette, P. Que., 
Canada J6E 3H6, 514/756-6688. 

St. Louis, MO: Jefferson County 
Users Group (subgroup of St. Louis 
Users Group). Larry Ross, 937-4550 
All computers, non-users welcome. 

Orleans, MA: The Wizards of Cod, 
Richard Andrews, POB 234, So. Or¬ 
leans, MA 02662, 617/255-4290. 

Southeast Florida: ZX Southeast 
Region, Ralph M. Coletti, 869 Le¬ 
vitt Parkway, Rockledge, FL 32955. 

Hurlburt Field, FL: Tom Bair, 12 
Mayo St., Hurlburt Field, FL 32544. 

Dallas, TX: T. Taylor, 2936 Long- 
meade, Farmers Branch, TX 75234. 

Kansas City, MO: Col. Ralph H. 
Goodell, Jr., 913/381-9443 or 
913/648-6696. 

Springfield, MA: If interested 
in forming users group, contact M. 
Dale White, 20 Frost St., Spring- 
field, MA 01105, 413/739-2350. 


4 










FULL SIZE KEYBOARD 
CONVERSION 


FOR 

YOUR 

ZX-81/ 

TS-1000 


Fully Warranteed 
For 90 Days! 


SUN KD-81 


If you're tired of not knowing whether your data got entered or tired of pok¬ 
ing data in with one or two fingers, then it’s time to upgrade your ZX-81 to 
a full size, professional keyboard. The SUN KD-81 KEYBOARD offers all 
the ease and comfort of imputting your programs and text on a fast and ef¬ 
ficient professional-sized keyboard! 

KD-81 FEATURES 


INSTALL 

• No Soldering 

• No Modifications 



GET A BETTER PICTURE WITH SAMWOO MONITORS 

FOR YOUR SINCLAIR COMPUTERS F oat „r OC - 

The SAMWOO provides a much better picture than your TV reaiureb. 
monitor. Includes easy-to-follow instructions for a simple * Composite \ 
modification. _ Input/Outpu 


9" 18Mhz BANDWIDTH 

Green. $121.00 

Orange. 125.00 


12" 12Mhz BANDWIDTH 

Green. $130.00 

Orange. 134.00 


Add $7.50 Shipping and Handling for this item. 


Features: 

• Composite Video 
Input/Output 

• Switchable Input 
Impedance 75 or 
lOKohm 

• 750 Line Resolution 
at Center and 500 
Lines at Corners 

• Dimensions are 
12.13" x 11.34" x 
11.65" for the 12" 
model and 8.66" x 
8.54" x 9.05" for the 
9" model 


And enjoy the comfort and 
ease of inputting your data 
on a full size keyboard! 


1. Remove 4 screws securing ZX-81 case 
and remove 2 screws holding ZX-81 PCB. 

2. Unplug the 2 ribbon cables from the 
ZX-81 keyboard. 

3. Plug the 2 ribbon cables into the con¬ 
nectors on the KD-81 keyboard. 

4. Attach the ZX-81 PCB to the KD-81 
case with 2 screws, close case and install 
remaining 4 screws into the bottom of the 
KD-81 Keyboard case ... 


• Full size keyboard with 41 keys 

• Two color silk-screened key tops 
for easy reading 

• Key tops have commands and 
graphics spelled out the same as 
ZX-81 

• Extra shift key for real keyboard- 
style typing 

• Full size space bar 

• Allows touch typing 

• Rear cutout allows any RAM or 


expansion module to be plugged 
in 

• Keyboard comes with own cables 

• Keyboard case holds both 
keyboard and computer with room 
to spare 

• High impact plastic case with 
vaporized metal shielding 

• Easy assembly — no soldering, 
no modifications 

• Measures 10%" x TU” x 


Check out these 
simple 



SUNTRONICS CO., INC. 

12621 Crenshaw Blvd., Hawthorne, CA 90250 

STORE HOURS: MON.-FRI. 9:00 am to 6:00 pm 
SATURDAY 10:00 am to 5:00 pm 


CALIFORNIA OUTSIDE CALIFORNIA TOLL FREE 

213 - 644-1149 1 - 800 - 421-5775 

(for Tech Info and Calif, orders) (Order Desk Only) 

Mail Order — Minimum Order $10. Send Money Order or Check to P.O. BOX 1957 — 
DEPT. B, HAWTHORNE, CA 90250. VISA or Mastercard (please include expiration 
date). Add $4.00 postage and handling to order. CA residents add 6% sales tax. 











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. 

Assigning the function to a 
string and calling it by using the 
VAL command executes the function. 
Although the ZX/TS manual briefly 
explains the procedure, you can use 
and expand this ability to satisfy 
a variety of programming needs. 

For those not familiar with 
the VAL command, it takes the ac¬ 
tual numeric value of any numbers 
or numeric phrases in a string 
variable. The ZX/TS expression 
evaluator looks at the formula 
assigned to the string and performs 
all the incorporated calculations. 
Example: If your borrowed program 


contains these lines: 

100 DEF FN (A) =X/. 023 *SIN (X-2) 
200 LET X=X-FN(A) 
change them to: 



Like other computers' FN(A) 
statement, when you call the func¬ 
tion on your ZX/TS the variables in 
the formulas must have some pre¬ 
assigned value; no 0 default exists 
for unassigned variables. 

You can also put USR calls 
(machine language subroutine call) 
in the function without affecting 
the answer. Suppose you want to 
clear the screen each time you call 
a certain function. Try this demo 
program to see it work: 




At last a reference manual 
which covers all the hardware 
aspects of the TS1000- includes 
complete circuit diagrams! 


Orders to: MELBOURNE HOUSE SOFTWARE 

Dept. CS 347 Reedwood Drive, Nashville, TN 37217 

Dealer orders and queries: 800/251-5900 
(ask for a Melbourne House operator) 

Visa and M/C orders 

can be phoned in: 615/361-3738 

BOOKS: 

□ 25895 The Complete Basic Course $34 

□ 25957 Machine Language Programming 

Made Simple $ 14 . 

□ 20922 The Complete Timex/Sinclair 

ROM Disassembly $19. 1 

□ 26025 Not Only 30 Programs $9.' 

□ 25913 Understanding Your ZX81 ROM $14. ( 

□ 51539 InsandOuts $12! 

TAPES: 

□ 13941 Gamestape1:li Programs-IK $14! 


Enclosed is my check or money order for $_ 

Please charge my □ Visa or □ MasterCard Card # 


Gamestape 2 3Games-16K 
Gamestape 3: Catacombs 
Adventure-16K 

Gamestape 4:3D Monster Maze-16K 
Gamestape 5:3DOrbiter-l6K 
Space Trek-16K 
Super Invasion-IK 
Wall Busters-IK 
10 Exciting Programs-IK 
Reversi-IK 
i Toolbox-IK 

| Basic Course 2 cassette pack 
Combat Flight-16K 

TOTAL: $ _ 
Residents of CA,MD,TN 

please add sales taxes: _ 

Add $2 for Shipping & Handling, 

foreign orders add $6: _ 


expiration date 


MELBOURNE HOUSE SOFTWARE 


6 


















(RUN it in SLOW or you'll miss the 
show.) Lines 10-30 fill the screen 
with black lines. Line 100 assigns 
a value to variable A$. Line 110 
tells the computer to calculate the 
VALue of A$. It performs the math 
in the first part of the formula. 
When it comes to the USR 2602, it 
goes to the machine language rou¬ 
tine at that memory location. The 
8K ROM clear screen routine resides 
at location 2602. In ZX/TS BASIC, 
a USR command returns the contents 
of the BC registers. So if you 
enter 100 PRINT USR 2602 and RUN, 
the screen clears and whatever 
value is in the BC registers prints 
on the screen. So we multiply the 
USR command by 0 to nullify the 
number it would otherwise return. 

Save time and space by includ¬ 
ing conditional statements in your 
functions. The ZX/TS expression 
evaluator scans the function, in¬ 
terpreting true conditionals as 1 
and false conditionals as 0. You 
don't have to check everything with 
IF-THENs. For example: 

100 LET G=10 
200 LET X=3 
300 LET Y=G*X 

400 LET A$=(Y<X) *2+2** (Y> (G)) " 

500 PRINT CHR$ VAL$ A$;"AAAA" 

Since the first expression is 
false (30 is not less than 3), the 
ZX/TS evaluates it as 0 and multi¬ 
plies 0 by 2. The second expres¬ 
sion is true (30 is greater than 
13), so it evaluates as 1. The 
computer raises 2 to the first 
power, yielding 2, and adds it to 
results of the previous operation, 

0. Line 500 thus prints the char¬ 
acter whose code is 2, the graphic 
symbol on the 2 key, before the 
string "AAAA". 

If you know ZX/TS BASIC fairly 
well, you probably understand its 
string slicing ability. Suppose 
A$="ABCDEFG" and you want to print 
the first four characters of A$. 

You enter 100 PRINT A$( TO 4). 

Using this principle you can exe¬ 
cute certain parts or sections of a 
function exclusively. For example. 


add to our previous program: 

105 LET A$=A$( TO 6) 

Now the computer evaluates only the 
first six characters of A$. Your 
answer in line 120 is different, 
and you don't get the screen clear¬ 
ing, because everything after the 
first six characters is sliced off. 
Be sure not to slice a function 
after an operation symbol. 

Dave Straub, Petaluma, CA 

DISABLE AUTO-LIST 

Automatic line listing of pro¬ 
grams takes too much time when you 
type in long programs. This rou¬ 
tine tricks Sinclair's auto-list 
mechanism into malfunctioning so 
new program lines do not appear on 
the screen. Disable your comput¬ 
er's auto-list function using this 
procedure with or without a loaded 
program. If you have machine code 
stored in line 1, you must move it 
to line 2 with POKE 16510,2. The 
MC's starting address then increas¬ 
es by nine, so call it with USR 
16523 instead of USR 16514. 

1. Press LIST then ENTER. 

2. Type 1 REM 123 then ENTER. 

3. Type POKE 16514,118 then ENTER. 

4. Type POKE 16515,118 then ENTER. 

5. Type POKE 16516,118 then ENTER. 

Now press ENTER to try to 
LIST. The only thing that should 
appear is 1 REM. You can see pro¬ 
gram lines after line 1 by entering 
LIST line number. 

Restart auto-list by DELETEing 
line 1. Or LIST N, where N is any 
program line number greater than 1. 
Then POKE 16419,N. Press ENTER and 
the program will auto-list. (The 
program will not auto-list by pres¬ 
sing LIST then ENTER.) Disable 
auto-list again with POKE 16419,0 
or LIST then ENTER. The top pro¬ 
gram line number in automatic 
listings lives at address 16419. 

Gary S. Preston, Glade Hill, VA 


7 



MODULES FOR: 

TIMEX-Sinclair 


MODEM $119.“ 



$149 * ASSEMBLED 


(RS-232) Port & Software 
Included) 


64-K MEMORY $129. 9 K ? T 

the “ULTIMATE MEMORY” 

FEA TURES: * 139 “ assembled 

• Battery backup ^ 

• PROM/ROM socket 

• Reset Switch 

• BYTE-BACK EXCLUSIVE FULL 64-K 


The 0-8K area is available You can execute a copy routine (provided) to 
copy theTIMEX ROM into the 0-8K area of RAM then flipa switch and you 
have your operating system in RAM You can modify it and create your 
own customized operating system 


WHY PAY MORE FOR LESS FEATURES? 

GET THE “ULTIMATE MEMORY" BYTE-BACK UM-64 


A COMPANY YOU CAN DEPEND ON 

BYTE-BACK CO. is the oldest and one of the world’s largest 
suppliers of modules for the ZX81 and TIMEX-Sinclair 1000 
computers. There are thousands of BYTE-BACK modules in use 
with a track record of proven reliability. 

RS-232 PRINTER INTERFACE Only $59“ KIT $69.“ ASSEMBLED 
CONTROL MODULE 8 Relays, 8 Inputs, $59“ KIT $69“ ASSEMBLED 

16K MEMORY UM16 $59 , 95 KIT $69 * ASSEMBLED & TESTED 
Battery backup, reset switch, PROM/ROM socket PLUS. . . 

1 year, 100% trade-in credit towards the UM-64. 

BYTE BACK CO. 

Rt. 3, Box 147, Brodie Road 
Leesvllle, S.C. 29070 
ORDER PHONE 803-532-5812 Wg* 

Add $4.95 shipping & handling to all orders, 

90 Day Warranty On All Modules. 10 —Day Return Priviledge 



NEW FEATURES ON TS2000, TS1500 

Advance publicity photos from 
Timex show some interesting fea¬ 
tures of the new TS2000 and TS1500. 

TS2000 functions changed from 
Sinclair's ZX Spectrum (TS2000 UK 
predecessor) include: 

Key TS2000 Spectrum 
P RESET (c) 

A FREE ~ 

S STICK I 

F ON ERR { 

G SOUND 3 

Silver-colored TS2000S sport a 
full space bar, a larger ENTER key 
and a separate BREAK key. A 3" 
covered compartment holds a TCC— 
Timex Command Cartridge (plug-in 
ROM cartridge). The keys appear 
hard, unlike Spectrum's soft keys. 

Another photo shows the TS1500 
case—now rectangular, resembling 
the TS2000, but smaller. Keyboard 
layout seems identical to the TS 
1000's, but with moveable keys that 
look like Spectrum's soft keys. 


CHECKERS FOR TWO—8K/16K 


Play this game just like board 
checkers. To automatically SAVE 
the program, type in the listing, 
start the recorder and press RUN 
then ENTER. The checkerboard takes 
about 20 seconds to appear. Press 
S as soon as the board appears (be¬ 
fore the display blinks and the 
"L" input appears). The program 
saves under "CHECK." 

At the bottom, a square shows 
which player moves next. Moving a 
piece takes 4 steps. First, type 
the coordinates (first horizontal, 
then vertical) of the starting and 
landing squares for each move. Se¬ 
cond, press either 1 or 2. Press 1 
for single moves and final jumps of 
multiple moves. Press 2 for all 
but the last jump of multiple moves 
(You must enter each jump of a mul¬ 
tiple move separately). Third, hit 
space for a regular move or type C 
to crown your piece when you get to 
your opponent's baseline. Last, 
ENTER the move. For example: type 
FGEHl ENTER to move a black checker 
from space FG to space EH one sin¬ 
gle move (shown by 1) without a 
crown (shown by the space). 

Make sure your move is correct 
before ENTERing. The program stops 
with an error code after some wrong 
entries forcing you to reset to the 
beginning of the game. 

CHECKERS uses about 6K RAM. 


Thomas Shields, Franklin, NC 


f—: 




8 


















TIMEX 1000 


BUSINESS 


Budgeting. 

Inventory Control 

Financial Analyzer 

Stock Analyzer 

Critical Path Analyzer •« 
Bookkeeping. . . . 

39*95 

39.95 

39.95 

39.95 
l2# 95 

14.95 

GAMES 


leap Frog . 

Star Voyage .. . 

Fungaloids. ### * 

Invaders .. _ 

Chess ...».. 

Snakebite.... 

Packman ... T 

*9.95 

59.95 

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Shipping extra. No tax out of state. 

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PEQASUS MICRO SYSTEMS 

SOFTWARE & HARDWARE ENGINEERS 
P.O. BOX 397 

CHESTERTOWN, MD 21620 
Phone 301-348-5865 

SEND FOR FREE CATALOG 

ASTRO MAP & CONVERSION: 2 powerful and 
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constellations, find stars, nebulae & 
galaxies. (16K; 48K expanded help section 
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cover all your list needs. SAVINGS & LOAN 
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advice on wise investment decisions, 
reveals hidden costs. (16K, 48K expanded) 
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16K programs--$9.95; 48K programs--$14.95 
Includes P&H. MD. res. add 5% sales tax 






Title: 

Author: 
Publisher: 


Price: 


Your Timex Sinclair 
1000 and ZX81 
Douglas Hergert 
SYBEX Inc. 

2344 Sixth St. 
Berkeley,CA 94710 
$6.95 


As the latest and best of the 
new wave of Timexploitation books, 
Your Timex Sinclair 1000 and ZX81 
provides clear information about 
Timex computers. Hergert leads you 
by the hand from unpacking the com¬ 
puter to programming complex string 
functions. His patient writing 
style and apparent familiarity with 
the computer make this a required 
Timex Sinclair reference book. 

One key to Hergert's success 
lies in his tidy use of demonstra¬ 
tion programs. This elegant exam¬ 
ple introduces line numbers, key¬ 
words, PRINT, PRINT AT, functions, 
DELETE, editing, FOR-NEXT loops and 
graphics in just 13 lines. 



© SYBEX, Inc. 1983 
(Note: line 50 is graphic S and H; 
line 70 is inverse HELLO.) 

Other programs show consider¬ 
able stand-alone utility as well as 
simplifying graphics and strings. 
SYBEX's computer book experience 
helped produce a well designed for¬ 
mat. An effective teaching tool 
shows what the TV screen looks like 
after a demonstration program runs. 

Hergert's work serves as a 
valuable asset for any TS owner. 

John Connell, Neptune Beach, FL 


lO 




























Creations Inc. 


ACCOUIO 


Your own PERSONAL OR SMALL BUSINESS ac¬ 
counting system. Contains refinements not usually 
found in this type of program. “200 Transaction file” 
can be SEARCHED, PRINTED or DISPLAYED. This 
program has been throughly tested, and improved 
through extensive use. . 4nnE 

ORDER No. 03-1022 515)95 


AUTOFILE 


BREAKOUT 


Fast MACHINE CODE arcade-type game. If you 
haven't tried THIS version, you haven’t played 

00 °- $1495 


“BREAKOUr on the ZX81/TS1000. 
ORDER No. 03-4028 


PUCKMAN 


‘TOUCH-A-MATIC’™ 


An ELECTRONIC FILING SYSTEM that can be used 
for ANY type of data. Set up your own DATA-BASES 
with this easy to use, menu-driven program with 
AUTO-SEARCH facility. . 4Aen 

ORDER No. 03-1021 *1:) 5U 




ORDER No. 01-0007 
KOPAICS “TOUCH-A-MATIC” 
type more accurately and faster. It requires NO 
WIRES, NO SOLDERING. It’s as easy as removing 
the adhesive backing and pressing it into position. 


’ gives you the power to 


LOADS & SAVES 16 K file in 26 seconds instead of 
7 minutes! Cleans up signal for a cleaner load. 

• STRONGER, SHARPER DIGITAL SIGNAL 

• CLEANER, FILTERED POWER • ENCODES YOUR 
PROGRAM AND/OR DATE • Save time/Save energy 

• Baud rate increases from 250 to over 4000 bps. A 

must for all ZX81/TS1000 owners. *onnc 

ORDER No.04-1010 5^5)90 

Dealer Inquiries Invited 


COMPOSER 


Enables you to play any tune through your T.V. 
speaker, your cassette recorder or through an A.M. 
radio. With ‘COMPOSER’ you can control the dura¬ 
tion of each note. And you can save your song on 

ORDER No. 03-3012 $1995 


G R A F I X 


Draw and store complex images. Permits you to 
create, mix, and save your own screen artwork. You 
can mix graphics created with GRAFIX into another 
program. By itself or on tape. This program is a 
“must” for the CREATIVE PROGRAMMER.*., - oc 
ORDER No. 03-6005 $1495 


Z-99™ (Improved ‘M’-Coder) 


Now you can write MACHINE CODE PROGRAMS on 
your ZX81/TS1000 with Z-99. The best true MA¬ 
CHINE CODE COMPILER for the ZX81/TS1000 com¬ 
puter. Simply write your new program in BASIC (or 
load an EXISTING PROGRAM), press a key and Z-99 
will automatically compile it into MACHINE CODE for 
you. Give all your programs that SUPER—FAST pro¬ 
fessional look. Order Z-99 NOW to revolutionize your 
programming. Once you try Z-99 you’ll never write 
basic programs again! 

ORDER No. 03-5271 $ 19 95 


Superb fast moving MACHINE-CODE fun. Have an 
exciting time playing this EXCELLENT version of the 
popular arcade game. *4 age : 

ORDER No. 03-4027 * 14 a!) 


ORDER FORM 

TO AVOID DELAY PRINT CLEARLY 

STOCK NUMBER AND DESCRIPTION 

SSS, ™al 


13RBB 























NAME 

Sub-Total 

$ 

ADDRESS 

Add sales tax 

$ 

CITY STATE ZIP 


$ 

wft from $25.00 to $29.99 add $3.45 

w«P\T^ upto$9 " to $ 14 " add 52.00 from$30.00to$39.99 add$3.70 
from $15 0010 $19 99 add 52.50 from $40.00 to $49.99 add $3.95 
from $20.00 to $24.99 add $2.85 over $50.00 add $4.25 

Total amount 
enclosed or to 
be charged to 
my credit card 

$ 

CHARGE 

VISA 1 1 




MASTER 

CARD 


Q 


INTERBANK NO 


EXR DATE 


MO YEAR 


In Canada call Datronics (416) 496-2243 

















DEAR EDITOR: 


We found that Hewlett Packard 
82954A black print thermal paper 
works well in the TS2040 printer. 
Although 2 mm narrower than Sin¬ 
clair's, HP's paper feeds well and 
produces sharp text. Print heads 
show no wear after limited use. 
Stores carrying HP85 computers also 
stock HP paper. It comes in 400- 
ft. rolls which we respool to fit 
Sinclair's printer. We wind the 
paper onto 4 1/4" lengths of 3/4" 
dowel and mark the last 12- 18" to 
let us know the end is near. 

Andrew Banta, Orangevale, CA 


Please explain exactly what 
Syntactic Sum is. For long pro¬ 
grams, the machine code Syntactic 
Sum does not yield the same answer 
as Lloyd Painter's BASIC program in 
the SYNTAX circular. Painter's pro¬ 
gram gives a much larger number and 
takes much more time to calculate. 
Why is this? 

Richard Boltuck, Hammond, IN 

Syntactic Sum provides a number re¬ 
lated to keystrokes to check for 
changes in programs. It helps when 
saving and loading long programs, 
because you can lose some bytes in 
the transfer from page to machine. 

Lloyd's BASIC version can give 
a different result from the MC ver¬ 
sion, which adds values until it 
hits 65536, and then rolls over to 
start with 1 again. The BASIC 
version does not need to roll over 
because the ZX/TS holds numbers 
larger than 65536 in BASIC. When 
the MC and BASIC versions don't 
agree, subtract 65536 repeatedly 
from the BASIC version until you 
get below 65536. The two numbers 
should now agree.—AZ 


Thank you for helping me iden¬ 
tify the transistor in my Sinclair 
RAM pack. Cross reference and re¬ 
placement manuals do not list the 


transistor, marked ZTX750. 

I used an SK3262 RCA PNP 7W 
audio frequency driver transistor. 
You must change the 2.2K Ohm base 
resistor. I used 4.7K Ohms. The 
replacement comes in a T05 package 
and fits nicely inside the RAM 
pack. Sylvania ECG129 or General 
Electric GE244 should work as well. 

Chuck Goldwater, Sandy, UT 


Sinware announces you can now 
relocate the big version of HOT Z. 
This works nicely with John Olig- 
er's mod that opens up the 32-48K 
block (SQ, Winter 82). We also 
discovered the TS2040 printer in¬ 
terferes with the high memory ver¬ 
sion when used with some memories. 
As far as I could tell with one of 
my systems, the 32-40K block was 
messing up. Plugging the printer 
in behind a fully decoded EPROM 
board cured my problem. 

Ray Kingsley, Sinware, Santa Fe, NM 

We also cannot get the system up 
with both a 64K RAM and TS2040 
plugged in. When the display file 
prints a character, it calls an 
address 32K higher than the ROM 
addresses (in the region 32-40K). 
Memories greater than 16K must 
decode this region. It seems the 
TS2040 also uses this area, causing 
the display file to crash.—KO 


After almost 20 months of 
heavy use, my ZX81 developed frus¬ 
trating hardware problems such as 
strange graphics with subsequent 
crash on RUNning, perfectly good 
tapes not LOADing, crashes while 
SAVEing, and unsteady TV pictures. 

I discovered a cheap, simple cure: 
Q-tips and Archer cleaner/degreaser 
(from Radio Shack). Spray a small 
amount of cleaner into the can cap 
and liberally soak both ends of the 
Q-tip. Scrub both sides of the 
ZX81 edge connector without disas¬ 
sembling. Spray the female side of 
the 16K RAM pack and scrub TV cable 


12 



connectors and game adapter. 

This procedure takes less than 
10 minutes and results in no more 
crashes, a steady picture, and an 
end to SAVE/LOAD problems. 

Herman Geschwind, Greensboro, NC 

R.H. Miller reminds us of another 
maintenance tip: Apply Cramolin 
Red and Blue to contacts on your 
computer expansion ports and memory 
connectors to avoid crashes.—LV 


Paul Crecca (Dear Editor, May 
83) and your other readers should 
know that QSAVE programs work with 
self-running programs. A non- 
QSAVEd program may contain: 

9000 SAVE "P" 

9010 GOTO start line 

With QSAVE, the routine becomes: 

9000 FAST 

9010 PRINT USR 32383 (16K) 

9010 PRINT USR 8505 (64K) 

9020 GOTO startline 

GOTO 9000 SAVES the program, 
and RUNS it after LOADing. Change 
the start line to CLS to clear the 
number QSAVE prints. 

Jack Ryan, El Dorado, AR 


Many programs don't take ad¬ 
vantage of this memory-saving tip: 
Always substitute N*N for N**2. 
Because Sinclair's math routines 
keep you from raising a negative 
number to a power, you must use 
(ABS N)**2 in most cases, which 
runs 3 bytes longer and uses sev¬ 
eral more steps than N*N. For odd 
exponents, such as N**3, you get an 
error when N<0. To get around it, 
use (SGN N)*(ABS N)**3. Again, the 
substitute N*N*N does the job fast¬ 
er. This will not work for N**M, 
where M equals an undefined expo¬ 
nent that becomes defined only when 
the program runs, or when M differs 
with each execution. Variable and 
non-integral exponentiation do not 
lend themselves to substitution. 

David Taber, Menlo Park, CA 


I had a similar experience to 
Sidney Parker's (Dear Editor, May 
83) with Byte-Back's M-16 RAM kit. 
Some tips to add to his procedure: 
The best place to cut the trace is 
near pin 9 of IC U3 (74S74 flip- 
flop) where it's clear of other 
traces, and an easy place to patch 
if the change fails. IC U3 is the 
top IC with the connector at the 
bottom. Viewed from the foil side, 
it's the left IC. Make the connec¬ 
tion between pin 9 and 10 on IC U14 
(74LS10 gate). On the foil side, 
just solder a jumper across the two 
pin tips, being careful not to con¬ 
tact the trace. The pins are num¬ 
bered #1-7 and #8-14, starting at 
the bottom left if the notch is on 
the left, looking at the IC top. 

Beware of Sidney's second fix. 
I made the connector pin high as 
suggested and plugged the module in 
with perfect results using VU-CALC. 
But the computer would not work 
with the TS2040. Removing the pin 
21A connection solved the problem. 

D.F. Wagner, Canby, OR 


I changed a bad Sinclair power 
pack with a homemade 9.2 VDQ 1 Amp 
regulated and bypassed the VHF mod¬ 
ulator, branching the TV set in 
composite video. It now works bet¬ 
ter, but I have a gray stain over 
2/3 of the screen. How can I fix 
this? Also, please comment about 
improving load reliability, and the 
correct input level for MIC plugs. 

W. Brandao, Rio de Janeiro, Brazil 

Amplify the video or clamp video 
white level to remove the gray 
stain. Improve load reliability by 
changing the orientation of the TV 
to the recorder (try 90 degrees) as 
well as experimenting with distance 
between the TV and recorder. Plac¬ 
ing the TV close to the recorder 
creates a problem of induced noise. 
Use short, medium-quality audio 
tapes. The correct input level for 
MIC plugs is 5mV peak to peak.—KO 


1 3 




DESIGN—8K/16K 


Run this flashy program on a 
TV as a personalized store window 
ad. The program listed displays 
the slogan SYNTAX and SQ among mov¬ 
ing designs. First RUN the program 
to see how the slogan is centered, 
then EDIT line 130 to insert your 
specific message. 

RUNning the program displays 
several options first. Start as 
directed on the lower half of the 
menu. RECORD A DESIGN consists of 
two options: RECONSTRUCT A DESIGN 
freezes a design (without your slo¬ 
gan) for which you enter codes, and 
CREATE A DESIGN randomly generates 
designs around your slogan. 

Syntactic Sums vary with the 
message in line 130. DESIGN uses 
slightly more than 2K RAM. 

Thomas Warner, Philadelphia, PA 




EGG TIMER—8K/2K 


This simple, practical soft¬ 
ware timer sets off an alarm to let 
you know when your egg boils, your 
game finishes or time's up. 

Type in the program, including 
the four commas ending lines 1, 5, 

8 and 9. Turn your TV volume up 
and press RUN then ENTER. 

Type in the boiling time and 
hit any key except BREAK to start. 

EGG TIMER works best with just 
your computer and TV. Removing any 
add-ons minimizes background noise, 
making the alarm easier to hear. 

Change the last number in line 
13 to create different alarm tones. 

Dan Tandberg, Albuquerque, NM 










































































Use the POWER within your reach! 




12 issues 
only* $29.95 
Save $5.45! 
Plus receive 
free 

{ software 
\cassette! 


Name 


Address 


A new and unique magazine for the world’s 
most popular personal computer 


TIMEX SINCLAIR 1000: the price and 
technology breakthrough that finally 
made computers affordable. 

TIMEX SINCLAIR USER: the magazine 
that helps you use the power of this 
revolutionary computer. 

*U.S. dollars 


( ) Money order. Or charge to 


( ) Yes, I want to subscribe to TIMEX 
SINCLAIR USER at the special rate of*$29.95 
for 12 issues delivered to my door. In addition I 
understand I will receive the FREE software 
cassette with my first issue, i-- 


TIMEX SINCLAIR USER covers the full' 
spectrum of user interests. Education. 
Business applications. Home manage¬ 
ment. Games and family entertainment. 
And TIMEX SINCLAIR USER does it in an 
easy-to-understand style that’s 
authoritative yet friendly. 

Each issue is packed with articles and 
information that help owners make use 
of the power of their computer. News 
about software releases. Reviews. Hard¬ 
ware developments. Reader question 
and answer column. Eight pages of pro¬ 
gram listings in every issue. New and 
unique user applications. How to pro¬ 
gram. Interviews. Special money saving 
offers to readers. 

In fact, all the latest ideas and informa¬ 
tion to ensure that new owners and ex¬ 
pert users never tire of their computer. 


A good reason to order now! Receive a 
software program cassette of an ex¬ 
citing, new arcade game! “Packrabbit” 
is a regular $15.00 retail value. Free with 
subscriptions for a limited time only. 


Mail to TIMEX SINCLAIR USER, 49 La Salle Avenue, Buffalo, New York, 14217 


The best add on 
value for your ZX 81 or 
TIMEX SINCLAIR computer 


Now that you’ve got a TIMEX SINCLAIR 
computer make sure you get the new 
magazine that helps you to get the most 
out of it... TIMEX SINCLAIR USER! And 
take advantage of our special bonus of a 
free software cassette ($15.00 retail 
value) with each subscription. 

TIMEX SINCLAIR USER is published 
monthly. It keeps you totally up-to-date. 
It helps you make full use of the power 
of your computer. 


TS1000 

ZX81 


FREE BONUS WITH YOUR 
SUBSCRIPTION 


SUBSCRIBE NOW and take advantage 
of our special offer. Only*$29.95 for 12 
monthly issues postage paid. This 
represents a $6.00 saving over regular 
newstand prices. And remember, you 
receive a FREE BONUS with every 
subscription, a “Packrabbit” software 
cassette ($15.00 retail value). 


To order call 

800 - 543-3000 


“Packrabbit” 
Retail value 
$15.00 


Remember: the TS1000 was designed 
precisely for you. Whatever your age and 
experience in computers, TIMEX 
SINCLAIR USER can help you use the 
power of your computer. 


Ask for Operator 243. In Canada call 
(513) 729-4300 and ask for Operator 243. 


These numbers are for orders only. Have 
your VISA, Mastercard ready. 


For any age 
or experience 










LETTER RECOGNITION TRAIN—8K/2K 


VENDOR REPORT AND NOTES 


Children learning to read must 
first master skills of letter rec¬ 
ognition and discrimination. This 
simple program teaches that skill, 
with little help from adults. You 
won't need to encourage your kids 
to learn their letters with this 
eye-catching locomotive. 

Chugging across the screen, 
the train stops at a wall facing a 
randomly chosen letter. The train 
continues on its way if the child 
pushes the correct letter. A wrong 
choice keeps the train from moving. 

Short practice sessions total¬ 
ing one hour a month dramatically 
improve letter recognition. Assist 
the child who frustrates easily by 
showing which row of keys contains 
the correct choice. Give examples 
of letter sounds and usage. 

One last word—expect bright 
children to rub the keyboard ran¬ 
domly instead of poking the let¬ 
ters. Explain this isn't fair and 
show that it's quicker to use the 
right key. Good luck! 

Gene Alvarez, Oviedo, FL 



Norris Electronics of Slidell, LA 
is out of business. Tracy Norris 
states he has filled all customer 
orders and cannot return any units 
received after June 10. 

Timex reports printer paper now in 
stock at Timex Products Service in. 
Little Rock, AK 501/569-4873. Also 
from E. Arthur Brown, Alexandria, 

MN 612/762-1631. Call 800-24-TIMEX 
for distributors in your area who 
may carry printer and/or paper. 


Byte-Back M-64 RAMS shipped before 
May 20 do not work with the TS2040 
printer. Call Byte-Back any time 
at 803/532-5812 for advice on easy 
repairs (one cut and one jumper) to 
insure compatibility. M-64 RAMS 
shipped after May 20 and UM64K RAMS 
do work with the printer. Cause 
relates to "unorthodox" data bus 
timing problems when using TS2040S, 
Jerry Minchey of Byte-Back reports. 



TS 1000™/ZX8V M OWNERS. 


• Improve programming and game playing, too! 

• Easy to install - no wiring or soldering required 

• Clear Vinyl with key-shaped openings and 
adhesive backing. 

TYPEX/81™ Keyboard □ 

$5.95 + $1.50 P&H □□□□□□□□□□ 

[□□□□□□□□□□ 

Order by mail or phone. 

216/234-2662 • VISA & MASTERCARD welcome. 

GANHART/EARTHings 

115 N. Rocky River Dr.«Dept.X1 
Berea, OH 44017 


DEALER/DISTRIBUTOR 
INQUIRIES INVITED 





























XFORTH© 

WRITTEN IN ENGLAND BY 
PROFESSIONAL PROGRAMMERS 

• Sinclair ZX-8T 'Timex 1/S 1000* 

• Very full FORTH-79 sub-set 

• On cassette for 16K (or more) 

• Loads in one pass (unlike some 
versions which require up to four extra 
editor loads) 

• Compact coding - 10K+ still available 
for user code. 

• Sinclair specific look up tables (uses 
Sinclair code instead of ASCII) 

• Extra utilities - CLS, PLOT ... 

• BASIC call - return to BASIC with simple, 
one word inst. 

• Only $25.00/tape + $1.00 P&H. Arkansas 
residents add $1.00. 

Formerly distributed only by ZETA' V 

SOFTWARE, we have the original FOOTBALL 

FORECASTER with 1983 data base. 

Available for 16K ZX-81, T/S1000 or 16KTRS-80 

Color Computer. Specify NFL or College. Only 

$19.95 each or $29.95 for both. Add $1.00 

P&H. Ark. residents add 4% Tax. 

HAWG WILD SOFTWARE 

P.O. Box 7668 

Little Rock, Arkansas 72217 


Cure Memopak incompatibility with 
your TS2040 printer by increasing 
the power supply, reports Memotech 
chief Said Fateh. Memotech's test¬ 
ers found that at least a 2-Amp 
power supply will successfully ope¬ 
rate your TS2040 and Memopak 32K 
RAM pack together. 

MicroSync Services, a ZX/TS repair 
business in Keene, NH, provides 
technical assistance Tues. and 
Thurs. 12-3 PM only. Speak with 
service representatives Mon.-Fri. 
3-6 PM for nontechnical problems. 

Frog Software assures us they are 
still in business, but extremely 
behind schedule. They are now 
distributing the May-June issue 
of Sinclair Computing . 

SyncWare will not carry its battery 
backup units after June 30. They 
will not fill individual orders 
after that time, but will consider 
quantity orders by contract. 


SOFTWARE REVIEW 

Program: Frogger 

Price: $19.95 

ROM/RAM required?: 8K/16K 
Printed listings?: No 
Program listable?: No 
Language: Machine Code 

From: The Cornsoft Group 

6008 N. Keystone Ave. 
Indianapolis, IN 37217 

Frogger helps Timex step up to 
the big time arcade with fast ac¬ 
tion, good medium resolution graph¬ 
ics and a challenge tough to beat. 

You start with five frogs who 
must safely reach the far side of a 
busy highway and then cross a pond 
to get back home. You must first 
avoid six countercurrent vehicles 
as the frog moves up the screen. 
Keyboard controls let you move your 
frog in four directions to avoid 
oncoming cars. Mistakes here pro¬ 
duce some cute squashed frogs. 

Once across the highway, a 
swamp full of crocodiles, snakes 
and diving turtles confronts you. 

To get your frog home you must 
safely hop from one creature to 
another as they swim. 

Special features in this sec¬ 
tion give you insects to eat and 
points for escorting lady frogs. 

Complaints: Cornsoft provides 
terse instructions. Frogger loads 
in an agonizing four minutes and 15 
seconds. Because of machine code 
programming, you cannot BREAK out 
of the game unless you use their 
break code 5T. This leaves the 
keyboard locked up, forcing you to 
reload to play again. (Cornsoft 
advises going easy on the keyboard 
to avoid RAM pack wobbling.—Ed.) 

This software, like others, 
cannot accept different joystick 
codes. Frogger, of course, has no 
sound, a slight annoyance. 

Despite these negative points, 
Frogger's fine game action earns 
Cornsoft an A for effort. 

P.J. Donnelly, Centerport, NY 


17 






MEMOTECH INTRODUCES THREE NEW 
SOFTWARE PACKAGES FOR YOUR 
TIMEX-SINCLAIR. 

All Memotech software is compatible with both the ZX-81 and 
TS-1000 computers and comes in its own Memopak case that plugs 
directly into your computer. 

MEMOCALC 

Now there’s a powerful tool to assist you with reports and financial 
forecasts. Memocalc, our spreadsheet analysis software, on EPROM, 
enables TS-1000 and ZX-81 users to perform complex number crunching 
routines with ease. With Memotech’s 64K RAM a table of up to 7000 
numbers with up to 250 rows or 99 columns can be specified. Quick 
revisions can be achieved by entering new data to your formula. Then, 
by entering the command CALCULATE, the information is reevaluated 
and displayed. 

Spreadsheet analysis started as an aid to cash-flow analysis, but 
this powerful tool has now been generalized and Memocalc with it’s 
special ability to perform interactive calculations is invaluable in the 
performance of numerical tasks. 

MEMOTEXT 

The Memotext word processor, on EPROM, brings commercial 
standards of text editing to your computer. Text is first arranged in 32 
character lines for the screen with comprehensive editing facilities. On 
output the user simply chooses the line length for printing and the 
system does the rest. Used with our Memopak printer interfaces, it 


enables output with 80 character lines, upper and lower case, and single 
and double size characters. 

MEMOPAK ASSEMBLER 

The Memopak Assembler, on EPROM, is for those who want to roll 
up their software sleeves and get down to controlling precisely the power 
of their computer. It lets you code and edit a source program in the Z80 
language, and then assemble it into machine code. You can now write 
flexible and economical programs, tailor-made in every detail to your own 
needs, and free from the extravagant use of time and space that goes 
with the basic high level code. 

The editor mode allows you to code directly in the right format, 
manipulate individual lines and control the exact placing of source and 
machine code. Routines may be merged or listed (even to a commercial 
printer with our printer interfaces). 

The Assembler mode handles all standard Z80 mnemonics, 
numbers in hex or decimal, comments and user-selected labels. Be an 
expert software engineer through this pack and it’s clear documentation. 

ORDER AT NO RISK. 

All Memotech products carry our 10 day money back guarantee. If 
you’re not completely satisfied, return it within ten days and we will give 
you a full refund. And every Memotech product comes with a six month 
warranty. Should anything be defective with your Memotech product, 
return it to us and we will repair or replace it free of charge. Dealer 
inquiries welcome. To order any Memotech product use the order 
coupon or call our toll-free number 800/662-0949. 

TS-1000 is a registered trademark of Timex Corp. 


SOFTER 


Mail To: Memotech Corporation, 7550 West Yale Ave., Denver, CO 80227 


code: STX-6 

Price* Qty. 

Tbtal 

Memocalc 

$49.95 


Memotext 

4995 


Memopak Assembler 

4995 


Shipping and Handling 

4.95 

$ 4.95 

Tax (Colorado residents only) 

TOTAL $ 

‘All prices quoted in ILS. dollars. Prices and specifications subject to change without notice. 


□ Check □ MasterCard □ Visa 



Account No Exp. 

( ) 

Nan* 

Phone number 


Address 

City State Zip 


iitnuittn 

CORPORATION 

7550 West Yale Avenue, Denver, Colorado 80227, 303/986-1516, TWX 910-320-2917 










TIMEX MAKES THE 
COMPUTER, 

BUT WE MAKE IT TICK. 


If you own a TS-1000 or ZX-81 computer and want to bring out the power within it, you’ll want Memotech. From easier input to high 
quality output and greater memory, Memotech makes the add-ons you demand. Every Memotech peripheral 
comes in a black anodized aluminum case and is designed to fit together in “piggy back” fashion enabling you 
to continue to add on and still keep an integrated system look. 

MEMOPAK RAM All Memopak RAMs are directly addressable, user transparent, are neither switched nor 
paged and no additional power supply is required. You can also choose the Memopak RAM which is just 
right for your needs. From economy to power. 16K RAM The Memopak l6K RAM is the most 
economical way to add memory to your TS-1000. It is fully compatible with the Timex or Memotech l6K 
RAMs to provide you with up to 32K of RAM. The 16K RAM also offers additional add-on capabilities 
through its “piggy back” connection. 32K RAM The 322K Memopak enables you to execute 
sophisticated programs and store large data bases and like the l6K RAM is fully compatible with Timex’s or 
Memotech’s l6K RAMs to give you a full 48K of RAM. 64K RAM The 64K Memopak is powerful 
enough to turn your TS-1000 into a computer with capabilities suitable for business and educational use. It 
accepts such BASIC commands as 10 DIM A (9000). MEMOCALC Memocalc, our spreadsheet analysis 
software, enables TS-1000 users to perform complex number crunching routines with ease. With 
the 64K RAM a table of up to 7000 numbers with up to 250 rows or 99 columns can be specified. 

Quick revisions can be achieved by entering new data to your formula. 

MEMOTECH KEYBOARD For ease of operation, the Memotech keyboard is a high quality 
standard typewriter keyboard, with TS-1000 legends. The keyboard is cable connected to a buffered 
interface which is housed in a standard Memopak case and plugs directly into the back of the 







TS-1000 or other Memopaks. MEMOPAK HRG The Memopak High Resolution Graphics, with 
up to 192 by 248 pixel resolution, enables display of high resolution “arcade game” style graphics 
through its resident 2K EPROM, programmed with a full range of graphics subroutines. 
CENTRONICS PARALLEL AND RS232 INTERFACES 
Memotech’s Interfaces enable your TS-1000 to use a wide range of 
compatible printers. The resident software in the units gives the 
complete ASCII set of characters. Both Memopak Interfaces provide lower case character capabilities and 
up to 80 column printing. The RS232 Interface is also compatible with modems and terminals. 

SEIKOSHA GP lOOA PRINTER The Seikosha GP 100A uses a 5x7 dot matrix printing format with 
ASCII standard upper and lower case character set. Printing speed is 30 characters/second with a 
maximum width of 80 characters. The printer uses standard fanfold paper up to 
9-1/2 inches wide. The GP 100A is offered as a package including cable and 

interface. Other printer packages are also 
available through Memotech. 

ORDER AT NO RISK. All Memotech 
products carry our 10 day money back 
guarantee. If you’re not completely 
satisfied, return it within ten days and we 
will give you a full refund. And every 
Memotech product comes with a six 
month warranty. Should anything be 

defective with your Memotech product, return it to us and we will repair or replace 
it free of charge. Dealer inquiries welcome. To order any Memotech product use 

the order coupon or call our toll-free number 800/662-0949. 

TS-1000 is a registered trademark of Timex Corp. 



[Mail To: Memotech Corporation, 7550 West Yale Ave., Denver, CO 80227 

Code: STX-6 

Price* Qty. Tbtal | 

| 16KRAM 

$ 49 95 , 


| 32KRAM 

99 95 


| 64K RAM 

14995 


| Memocalc 

4995 


| Keyboard with Interface 

99 95 


j High Resolution Graphics 

99 95 


1 Centronics Parallel Interface 

74.95 


RS232 Interface 

99 95 


_ Printer Cable 

1995 


[ GP 100A Printer Package** 

39900 


' Shipping and Handling 

4.95 

$ 4.95 | 


CORPORATION 


7550 West Yale Avenue, Denver, Colorado 80227, 303/986-1516, TWX 910-320-2917 


Tkx (Colorado residents only) 


*All prices quoted in U.S. dollars. Prices and specifications subject to change without notice. | 
**Please add an additional $5 00 for printer shipping charges 
□ Check □ MasterCard □ Visa 


1 Account No Rvn 

1 

< 

) 

1 Name 

1 


Phone number 

j Address 

1 City 

- 

State Zip 


I_ 























THE PEOPLE'S 
^COMPUTER 

SUPPLY 


MAKE YOUR TIMEX/SINCLAIR ZX80/81 do everything 
FROM PLAYING GAMES TO SERIOUS BUSINESS 
APPLICATIONS WITH HARDWARE & SOFTWARE FROM 
THE PEOPLE'S COMPUTER SUPPLY. 


MEMOTECH PRODUCTS OUR PRICE 

#1 64KMEMOPAK.$14495 

#2 32K MEMOPAK. 9595 

# 3 16K MEMOPAK.49 95 

# 4 "MEMOPAK ASSEMBLER" "MEMOTEXT" 

"MEMO CALC". 49 95 

#5 HIGH RES GRAPHICS. 9595 

# 6 PARALLEL PRINTER 

INTERFACE . 7495 

#7 RS232 INTERFACE FOR 

PRINTER & MODEM.9595 

#8 PRINTER CABLE SPECIFY 

RS232 0R CPI.19.95 

#9 NEW DIRECT CONNECT 

FULLSIZE KEYBOARD.99.95 

No soldering, plugs into edge connector 
#10 SEIKOSHA GP100A DOT 
MATRIX PRINTER. . 325.00. . 39995 
SE I KOSHA GP250X DOT 
MATRIX PRINTER. . 369.95. . 44995 


OTHER PRODUCTS 

#1 ZONX 81 SOUND 

GENERATOR.$49.95 

#2 USI PI 1 9" GREEN 

PHOSPHOR MONITOR.S134 95 

Requires Direct Video Mod to ZX81 
FREE Plans with order, simple in¬ 
stallation 

#3 WILLIAM STUART SYSTEMS 
LTD 

SPEECH SYNTHESIS 

UNLIMITED 

VOCABULARY FOR ZX80 81 
TIMEX.99.95 

#4 BIG EARS SPEECH RECOGNI 

TION SYSTEM.99.95 

CRASH GUARD PROTECTION FROM 
ACC I DENTAL CRASHES.19.95 


CALL OR WRITE FOR OUR CATALOG. 


VISA, MASTER CARD & AMEX 
& MONEY ORDERS 


PERSONAL CHECK 
ALLOW 2 WEEKS 


Foreign Orders Please Add $5.50 
U.S. Orders Please Add $3.00 
Printer & Monitor Orders add $7.50 

THE PEOPLE'S COMPUTER SUPPLY 
P.O. Box 664, Sidney, Nebraska 69162 
Order Phone: Tel. 308-254-3208 


A LARGE 60 KEY TACTILE FEEL KEYBOARD 
(MEASURES 10" x 4") THAT PLUGS INTO THE SAME 
CONNECTORS AS EXISTING KEYBOARD ON YOUR 
ZX81 OR TIMEX SINCLAIR 1000. IT HAS ALL 
SILKSCREENED LEGENDS IN 3 COLORS ON THE 
BASE; MOLDED LEGENDS & GRAPHICS ON KEY TOPS; 
8 AUTOMATIC SHIFT KEYS (NO SHIFTING REQUIRED) 
FOR EDIT, DELETE, SINGLE & DOUBLE QUOTES, 
COLON, SEMI-COLON, FUNCTION & STOP; 5" SPACE 
BAR; 2 SHIFT KEYS; NUMERIC KEY PAD. 


MASS. RESIDENTS ADD 5% SALES TAX 
SHIPPING & HANDLING $4.00/UNIT 

DELIVERY 4 - 6 WEEKS. QUANTITY DISCOUNTS. WE 
WILL ACCEPT MC/VISA. PLEASE INCLUDE #’S, EXP. 
DATE AND SIGNATURE. FOR MORE INFORMATION 
SEND SASE. SEND INQUIRIES, CHECK OR MONEY 

order TO E-Z KEY SUITE 75B 


711 SOUTHERN ARTERY 
QUINCY, MA 02169 
617/773-1187 


LOADING ONE ZX/TS FROM ANOTHER 

Send programs from one compu¬ 
ter to another directly by wire 
from the sender's monitor driver to 
the receiver's ear jack. Either 
SYNTAX'S video inverter or Random 
Access's DVC-2 work using normal 
video. Transfer occurs at normal 
cassette speed. 

Connect the monitor output of 
your driver (Apr.83) to the EAR 
jack of the machine you want to 
load. Use LOAD '"' ENTER to put the 
listening machine in receive mode. 
Then SAVE "name" ENTER on the send¬ 
ing machine to transmit the pro¬ 
gram. After transmission of a 
normal program, both screens show 
0/0. Press ENTER on the listener 
to see the program listing. 

We tried the following connec¬ 
tions to the listener's EAR jack, 
with these results: 

Sender Output Result 

MIC output of Signal too small, no 

ZX/TS LOAD 

Tape recorder Signal too small, no 
as amplifier LOAD 

Unbuffered Signal too small, no 

video from ZX/ LOAD. Monitor/TV 
TS modulator display dims 
input 

Unbuffered LOADS OK. Monitor 

video from pin dims, single dots 
16 IC1 disappear 

Video output LOAD OK w/normal 
from SYNTAX video, inverse does 
monitor driver not LOAD 
or Random 
Access DVC-2 

All experiments used 12-foot 
stereo cables (Radio Shack 42-2368) 
to transmit between machines and 
adaptors to convert from RCA plugs 
to miniature phone plugs. 

We got reliable loading from a 
64K machine (RAMTOP at 16K) to a 2K 
machine and reversed direction with 


20 
















no problem. We also successfully 
sent programs in auto-save mode. 
Both machines run the program si¬ 
multaneously when loading stops. 

8K MC VIDEO INVERT ROUTINE 

This machine code program can 
almost instantly change everything 
on the screen to inverse video. If 
your computer has 4K or more RAM, 
the entire screen, including the 
bottom two lines, reverse. With 
less memory, only printed charac¬ 
ters and spaces to their left 
change; the rest of the screen 
remains white. 

To use this program, enter: 




RUN, then enter these numbers left 
to right and top to bottom: 

42 12 64 237 91 16 64 1 

118 128 126 185 40 2 128 119 

35 124 186 32 245 125 187 32 

241 38 0 201 

You can now delete the program 
lines. Call the routine with: 



Enter this program to see the 
routine work. Don't RUN it! Use 
GOTO 10 to avoid wiping out vari¬ 
able 1$ that holds your MC. 



Try this again without a RAM pack 
to see the difference. 

You can store machine code in 
a string with any MC program that 
does not print characters to the 
screen. Note that it doesn't use 
the first byte. 

Jason Harper, Sylvester, TX 


TIMEX 1000 COMPUTER 
* OWNERS * 

IF YOU OWN A 16K RAM MODULE 
THEN YOU NEED A “CRASH GUARD” 
TO HELP SOLVE YOUR WOBBLE AND 
CRASH PROBLEMS 


* NO DANGER BUMPING THE MODULE 

* PROVIDES A SOLID WORK BASE 

* MADE OF HEAVY GUAGE ACRYLIC 



VISA OR MASTER CARD ACCEPTED 

EXPENSE CUTTERS PRODUCTS, INC. 
P.O. BOX 9543 RAYTOWN, MO 64133 
(816) 353-1690 

10 DAY TRIAL PERIOD 
"SATISFACTION GUARANTEED" 


CLASSIFIED ADS 


Tell your message to nearly 10K ZX/ 
TS users for just $9/line. Send ad 
typed 35 char./line exactly as it 
should appear with check to arrive 
by the 15th for next month's issue. 
Include a phone no., even if it 
isn't in your ad. Send a new order 
for each month's ad. No phone or 
credit card orders. SYNTAX, RD 2 
Box 457, Harvard, MA 01451. 

EASY TO USE 8K EPROM PROGRAMMER- 
Plugs onto back of computer and 
has slot for RAM pack etc. Holds 
two 4K 2732 EPROMS which you load 
with BASIC or M/C. Can be loaded 
back to RAM for programs that fail 
safe load instantly. With instruc¬ 
tions,software,and on EPROM for 
$64.95+$3.00 S/H. Extra EPROMS 4.95 
WA rsdnts add tax. MAV MICRO¬ 
PRODUCTS Box 31256 Seattle WA 98103 

BUSINESS GRAPHS, 9 Springbrook Cir. 
Sacramento, CA95831. Cassette $15. 


21 
















ANIMATED FUN *CAVES OF ZULU, CALVIN 
Glomb's Exciting Animated Adventure 
Is Now Available For 16K Timex/Sinc 
Only 19.95 + 2.00 S/H VISA/MC OK 
STUART SOFTWARE 25381-G ALICIA #316 
LAGUNA HILLS CA 92653 (714)855-4753 

.**TIMEX 2040 PRINTER**. 

.**IN STOCK WHY WAIT?**. 

Send $93 for immed. UPS delivery 
80 column printers from $229. 
Memotech products for 10 0/0 
off of list. All major softwar 
e houses 15 0/0 off list Timex p 
aper $6/3 rolls Send check to: 
Simply Sinclair PO Box "S" WDBG, 

VA 22194. (703)690-3798 

* * * CUSTOM PROGRAMS * * * 

Made to your specs. Affordable. 

Send Your Requirements With A 


SSAE To: G.K. Software, 

24 IRMA AVE., PORT WASH., NY 11050 

IN-LINE LOAD MONITOR : Load 

software tapes Ike a pro!-12.95 

PLASTIC RAM CLIP -2.00 

DIGIT GUIDER : Clear overlay-6.95 

* LOST IN SPACE -11.95 

UNIVERSAL INVENTORY FILE -16.95 

* UNIVERSAL MAILING LIST -10.95 

UNIVERSAL COIN COLLECTION -10.95 

UNIVERSAL STAMP COLLECTION -10.95 

UNIVERSAL RECORD ALBUM COLL—10.95 
♦Requires 16K RAM.GUARANTEED.Please 
add $1.50 S&H per order. NJ 6% tax. 


M.C.HOFFMAN COMPANY, DEPT.SX6, 

P.0. BOX 117, OAKLAND, N.J. 07436 

!!!! CUSTOM PROGRAMMING SERVICE .Send 
FULL description of needs and $30 
Chk/MO(Refunded if I am unable to 
produce working program)to:Scott 
Wolf.4949 Webster Rd.,New Haven, 

In. 46774(Please allow 1-6 weeks) 

*16K programsILow priceslBuisiness, 
♦home,and gamesllnfo,SASE to SHM,21 
***Brookview Drive,Macedon,NY,14502 

Forecast weather up to 48 hrs. in 
advance, no instruments. $5 prgrm., 
instrctns., cloud charts. Weather 
Data Network, c/o'K. Buckley, 58-63 
246 Crescent, Douglaston, NY 11362. 


******* NEW FROM BOB BERCH ******** 
Software on EPROM (half-blown 2764) 
ZX INTEGER COMPILER $30.00 

ZX ASSEMBLER/DISASSEMBLER $25.00 
For 2732A or 2-2176's, add $5.00 
For cassette version, subtract $5. 
CARTRIDGE KIT for above EPROM-holds 
any 2716, 2732,or 2764,mapped 0-16K 
Complete parts & instructions $18. 
BOB BERCH 19 JAQUES,ROCH. NY 14620 

NFLX FOOTBALL-The first all-graphic 
M/C Football game,with full feature 
action,avail, now. Send only $9.95 
SyncWare, POB 5177 ElMonte CA 91734 

450 BLocks*SCREENCALC*120 Functions 

-10- -11-12-13- 

$19.95 /NOV. _DEC. TOTAL 

BANTA SOFTWARE 16K /06.37 26328.45 

8088 Highwood Wy Orangevale CA95662 

ZX DATA FINDER : "...the best most 
economical data handler yet!" SYNC 
is now available on cassette-$14.95 
Tom Woods Box 64 Jefferson,NH 03583 

* COMPLETE KEYBOARD KIT w/detailed 
instructions, $37 incl. shipping. 

* Write for info on other add-ons! 
4-SINC POB 715 BLADENSBURG.MD.20710 

Dynamic Electronic Formulas and 
Computer-Aided Design Programs 
from Softec, P.O. Box 432, 
Fairport,NY 14450. All in 
BASIC with comprehensive 
instructions. Send SASE for a 
list of all programs and prices. 

MY TYPE teaches touch typing, over 
60 lessons. $8/16K cassette.(gaur.) 

BIG-KEY LEGENDS are dry-transfer, 
graphics for std. 1/2" keycaps, red 
& blk. to match ZX-81/TS-1000. $7./ 
set-SASE for free sample. DAYDESIGN 
790 E. BIG BEAVER, TROY, MI. 48084 

***** METAGRAPHICS ***** 
USE THE FULL GRAPHICS POTENTIAL OF 
Your ZX81/TS1000 (16K RAM). 2048 
CHARACTERS !! BASIC + M/C Gives You 
Total Artistic Control. Send $12.95 
********* CALLIOPE SOFTWARE ******* 
4130 COE DR. NE, ALBUQ., NM 87110 


22 












M- ~Z LEDGER -A must for small busi¬ 
nesses and household finances 
M^Z. LIST-For anyone that has items 
to list from coins to household 
inventory 

Send $21.95 for cassette or SASE 
for more information to M-Z SYSTEMS 
1003 Southcliff; Portland, TX 78374 

ZX/TS SOFTWARE Send SASE: John 
Anunti, 3309-20th St., S F, CA 94110 

OUR POLICY ON CONTRIBUTED MATERIAL 

SYNTAX invites you to express opinions related to any Sinclair computer or 
peripheral, or the newsletter. We will print, as space allows, letters discussing items 
of general interest. Of course, we reserve the right to edit letters to a suitable length 
and to refuse publication of any material. 

We welcome program listings for all levels of expertise and written in either 
Sinclair BASIC or Z80 machine code. Programs can be for any fun or useful 
purpose. We will test run each one before publishing it, but we will not debug 
programs; please send only workable listings. Programs submitted on cassette can be 
tested more quickly and with less chance of error. 

In return for your listing, we will pay you a token fee of $2.00 per program we 
use. This payment gives us the nonexclusive right to use that program in any form, 
world wide. This means you can still use it, sell it, or give it away, and so can we. 

We will consider submissions of news and hardware or software reviews. Please 
keep articles short (350-400 words). Again, we reserve the right to edit accepted 
articles to a suitable length. We will pay 7 cents per 6 characters, including spaces 
and punctuation, for accepted articles. 

When you send in programs for possible publication in SYNTAX, please 
include the following information: 

• How to operate the program, including what to input if it does not contain 
prompts. 

• Whether you can run the program over again and how. 

• How to exit the program. 

• The Syntactic Sum (program published in Feb. 81 and Jun. 81; send SASE 
for a free copy). 

• What RAM size program requires. 

• What ROM program uses. 

We pay for this explanatory text at the same rate as for articles in addition to 
payment for the program itself. 

If you want us to return your original program listing or article, please include 
a self-addressed, stamped envelope. Otherwise, we cannot return submitted material. 


**** UNBEATABLE SOFTWARE OFFER **** 
3 QUALITY CASSETTS FOR $12 + $2 S&H 
BLACKJACK,MASTERMIND,ESCAPE+5 MORE I 
COMPUWIZ POB 39078 MT VW, CA 94039 
Send SASE and get FREE MC program!! 

***SIMPLE MATH CHEM ENGR PROGRAMS** 
PREPARED TO YOUR INPUT/OUTPUT SPEC. 
SEND $25 TO MATCHES,2740 W.SAN JUAN 
TERRACE, TUCSON,AZ, 85713.SATISFAC. 
GUARENTEED. 4 TO 6 WEEKS DELIVERY 

COMPUSETTE is a Norelco-boxed and 
labeled C-10 cassette which is 
especially designed for micro¬ 
computer application by TAPEMASTERS 
25 for $20.00 100 for $70.00 

COMPUSETTE+ is a C-20 cassette 
25 for $22.50 100 for $80.00 

COMPUDISK is a SS, DD, Soft Sector 
5 1/4 In. Disk 10-$23.00 50—$110 

VISA MASTERCARD C.O.D. 

TX 214-349-0081**OTHER 800-527-1227 
10% Discount for Check with Order 
PO Box 38651W Dallas, Texas 75238 
FREIGHT PREPAID*DEFECTIVES REPLACED 

******** Father's Day Gift ******** 
KEYSTROKE MANAGEMENT. tm Four 2K 
Games. $14.95 (6% tax CA res.) FREE 
color catalog. 2-BIT SOFTWARE, SY5, 
P.O. Box 2036, Del Mar, CA 92014 
*** Charge Orders (619) 481-3629*** 


SYNTAX is published 

monthly by a wholly-owned 
subsidiary of The Harvard Group. 

Syntax ZX80, Inc. 

RD 2, Box 457, Harvard, MA 01451. 

Telephone 617/456-3661. 

12 issues, $29. Single issue, $4. 

Publisher: Kirtland H. Olson 
Editor: Ann L. Zevnik 
Assistant Editor: Lisa Fass Vivat 
Editorial Assistant: Karen Brody 

© Syntax ZX80, Inc., 1983. All rights 
reserved. Photocopying prohibited. 
ISSN 0273-2696 


YES! Please send me 12 issues of SYNTAX for $29. 6 . 83 

□ My check for $29 is enclosed. □ Please charge my □ MasterCard 
Make checks payable to: □ Diner’s Club □ American Express 

SYNTAX ZX80, INC. □ VISA Q Carte Blanche account 


account number 


exp. date 

bank number (MC onlv) 


signature 

Name 

Title 



Organization 
Address_ 


City 


State 

Zin 

Day PhoneJ_ 

) 

Evening Phone ( ) 

I own a □ Sinclair ZX80 

□ Sinclair ZX81 

Telephone orders call 



□ TS1000 

617-456-3661 


23 





Kayde 16K RAM $51.28, Kayde Graphic 
Board $58.64, ZON X-81 $49.28, RIST 
Parrot $90.30, Graphicomp education 
software $11.92. + $1.50 P&H/ord. 
CDN prices on request.Call VISA to 
416-466-5571. l-4wk deliv. FREE cat 
INTEGRATED DATA SYSTEMS 
11 Brighton Av Toronto M4M 1P3 

Business and Home Software 
12 years experience.Satisfaction or 
your money back. All programs $7.95 

Dome Bookkeeping.Fast Checking 

Word Processing.(none faster) 

64k bookkeeping.. (Dome++checking++) 
80 char, printer driver 64k / M.C. 

Same day ship with large S.A.S.E. 
Send order to: C.E.D.C., PO Box 222 
Salem, Wi. 53168 

TRY WINKY BOARD II interface! Copy 
ANY ZX/TS cassette, make LOADS easy 
+ more. No mods. $24, $18 kit PPD.. 
KEY CASSETTE LOADS & merges many 
programs into one, SAVES ANY ZX/TS 
cassette.$10 PPD. G. RUSSELL-ELEC. 
RDl Box 539S, Centre Hall PA 16828 

"MUST-HAVE" UTILITIES 
For Serious Programmers — On Cass. 
Save/Merge/Erase BASIC; Cass. Copy; 
Data Tape I/O; Swap/Overlay BASIC; 
Hex Asmblr w/ Symbols & Relocation; 
more. SASE for info. SIRIUSWARE 
6 Turning Mill, Lexington, MA 02173 


****** TREK TRIVIA ****** 
EXCITING 16K TREK LORE TEST TWO 
Sided Tape: Side 1 Multiple Choice 
Direct Answer On Flip Side. 

Send $12.95 CK/MO To:F & J SOFTWARE 
P.0,BOX 124 GREEN VILLAGE,N.J.07935 

COMPUTER ENGINEERING SERVICES HAS 
IT ALL! Blank C-12 cassettes ideal 
for 16K programs. Top quality data 
cassettes. 20 for $18.95. 100 for 
64.95. P&H; 20-1.75, 100-4.25. ALSO 
complete duplication services and 
more. Write for brochure. We have 
SOFTWARE! MUTUAL FUND ADVISOR will 
help you to buy and sell STOCKS & 
BONDS. $12.95* COMPUTE will help you 
with any math need. $14.95* BIQRYTHM 
9.95* SAVE YOUR COUNTRY a blow em up 
game. 8.95*RUBIK£ MASTER solves the 
"cube"$15.95 Coming soon, IBAL 
STOCK TRADER, PROJECT PHOENIX, MX- 
1000, A WORDPROCESSOR, and much 
more! (P&H on software$1.25 1st cl) 
P.O.BOX 1222 Show Low Az. 85901 

*********************************** 
*********************************** 
TS USER IS NOW READ BY 1000'S FOR 
1000'S OF GOOD REASONS. If you are 
a serious user then send $16.95 to 
TS USER, Box 155, Vicksburg, MI, 
49097, and get 12 super-savers. 
*********************************** 
*********************************** 


X 

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THE 

H\R\ARD 

GROLP 


Bolton Road, Harvard, Mass. 01451 
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First Class 


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william Tomlinson 

3635 RIVEREDGE DR. 
JACKSONVILLE FL 32211 


38 68 


U.S. Postage 
PAID 

Harvard, MA 
Permit No.8 
01451