A PUBLICATION OF THE HARVARD GROUP
FEB , 1983
IN THIS ISSUE
WINTER CONSUMER ELECTRONICS SHOW REPORT
When You Forget
Mastering Machine Code
on Your ZX81.14
49 Explosive Games
For Your ZX81.18
Machine Code Programming
Mod To Use Hunter RAM
with > 32K.18
News, New Products.. 1,2,3
On GOTO Statements.5
When You Forget Syntactic
Index to Advertisers
Brainchild Computer.... 18
Kopak Creations, Inc...15
Sinclair Research, Ltd..9
Timex's TS2040 thermal printer will hit the
stores this quarter. Priced at $99.95, it
matches both TS1000 and TS2000 machines in
color and styling and works with either one.
Timex will deliver TS2000S, the US ver¬
sion of the ZX Spectrum, during 2nd quarter
1983. Priced at $199.95 for 48K RAM, this 8-
color computer sets a tough value standard
for others to meet. You'll also see a 16K
version for $149.95. Timex also announced
tiny (1 1/2 x 2 x 1/8) TS2000 cartridge
software up to 32K ROM, priced below $25.
SYNTAX thinks TS2000S will differ from
Spectrum machines by more than TV scan rate.
We expect Sinclair BASIC listings will be
mostly compatible and programs with ROM calls
or systems variables will need modification.
TS1000 tapes need special software to load
into TS2000S and then need modified system
variables and translation to ASCII.
As others hawked TS1000 clones for March
or June delivery, Timex countered with a $15
rebate on TS1000S during the first quarter.
Mindware printers are in stores now and
Mindware showed full screen dump on the MW100
Sidewinder using 1 3/4" wide tape plus 132
column x 12 line printouts printed lengthwise
on the tape. We also saw Quickload operate—
impressive, reliable and fast.
For those who must check out competitive
machines, you'll want to see these: B/W—TI
99/2, Sanyo PHC20, and VZ200; Color—Mattel
Aquarius, Sanyo PHC25, Spectravideo SV 318, &
Panasonic JR 200 (Highest-priced last; all
$99-299 at retail, available midyear).
FORTH enthusiasts—look at the Jupiter
ACE, designed by Stephen Vickers and Richard
Altwasser. Available in the US from Data-
Assette of Oxford, PA, this machine has FORTH
in ROM with the Z80A processor bus available
at the rear. Many ZX/TS accessories will
work with special cables.
Sinclair has discontinued kit sales.
NEW PRODUCTS AND SERVICES
Crash Guard, made of heavy acrylic,
protects your 16K RAM from acciden¬
tal unplugging. $19.95, 10-day
trial, satisfaction guaranteed.
Expense Cutters Products Inc., POB
9543, Raytown, MO 64133.
Free machine code wall charts.
Send mailing tube/large envelope
with name, address, zip and 35
cents for postage (stamps O.K.).
Henri Poche', 5751 River Rd., New
Orleans, LA 70123.
Zip-sorted, adhesive-backed mailing
lists available: US user groups
(about 60), $6 ppd; software sup¬
pliers (about 200), $11 ppd; hard¬
ware suppliers (about 85), $6 ppd?
ZX/TS owners being compiled, to
add your name send it with address
and zip. TSG Enterprises, 54
Richwood PI., Denville, NJ 07834.
Domino arcade game now available.
Program on cassette, $9.95 check or
MO. More info: JPR Software, Box
4155, Winter Park, FL 32793.
Biocal Software has a new free
catalog. Send legal-size SASE to
Biocal Software, 340 Cypress Drive,
Fairfax, CA 94930.
Plug-in MEMOCALC gives spreadsheet
analysis of any table of numbers.
Screen acts as a window to table.
Maximum size of table is determined
by memory capacity? with 64K, you
get up to 250 rows or 99 columns.
Performs iterative calculations and
re-evaluates. Memotech Corp., 7550
W. Yale Ave., Suite 200, Denver, CO
Blank C-5, C-10 and C-12 computer
tapes, labels, packaging and mar¬
keting, data cassette duplication.
PC board layout and manufacture for
your hardware. Limited disk and
EPROM duplication. Free brochure.
Computer Engineering Services, P.0.
Box 1222, Show Low, AZ 85901.
Loan Analysis Program (needs 16K)
reduced. Helps analyze loans, cal¬
culate compound interest and depre¬
ciation. Also calculates monthly
payment for existing or new loan?
duration of pay back on loan; af¬
fordable loan amount? amortization
tables and more. On tape $9.95
plus $1.50 P&H. R.S. Panwar, 2035
Kentland Dr., Houston, TX 77067
32K plus I/O unit gives 4 parallel
I/O ports and 32K memory to ZX/TS.
Unit plugs into back of ZX/TS and
connects to other devices. Can
interface to A/D converters and
temperature probes through ports.
Complete unit (4 ports, 32K, cables
for ports, documentation) is $155
+$4.95 P&H. Partially populated
board (I/O ports and room for 32K
expansion later) is $50+$4.95 P&H.
Wisconsinc Electronics, POB 332,
Milton, WI 53563.
METAGRAPHICS creates drawings with
over 2000 graphics characters and
backrounds, $12.95. Needs 16K, on
tape. Calliope Software, 4130 Coe
Dr. NE, Albuquerque, NM 87110.
GRAPHPAK features bar graphs, line
graphs, pie charts and area graphs.
Plots data and helps in financial
planning. 10K BASIC program on
tape is listable. $14.95 with
P+H. Practical Computer Products,
21111 Strathmoor Ln., Huntington
Beach, CA 92646.
Decision Maker helps you decide by
helping you evaluate options. It
scores points statistically and
ranks options in order of benefit.
Career Path is based on psychologi¬
cal theory linking personality to
career decisions. Both need 16K,
are user friendly, documentation,
$14.50 each plus $1.50 P&H. Melear
Marketing, 3615 Saxon Way,
Marietta, GA 30062, 404/977-1295.
SixPac includes FORTH interpreter/
compiler, spreadsheet, inventory
management, calendar, household
budget, and data base management
programs. Each program includes
documented source listing and in¬
structions; needs 16K. Package,
$24.95+$3 P&H. SofTek, Box 4232,
Santa Fe, NM 87502.
Prevent memory module "wobble and
die" syndrome. RAMSTRAP holds RAM
pack in place. $3, $3.50 outside
US. RAMSTRAP, 104 Ridgeway Ave.,
Louisville, KY 40207.
TS1000S with built-in rechargeable
battery back-up protect against
temporary power loss, also power
16K RAM pack (not supplied). Power
on/off switch and indicator LEDs
provided. TS1000-B30 ($129.50 ppd.
in US) runs on battery up to 30
minutes, TS1000-B60 ($142.50) pro¬
tects against power loss up to 1
hour. FOURIER Analysis and Synthe¬
sis evaluates harmonic content of
repetitive waveform. Inverse oper¬
ation, constructing wave that re¬
sults from known harmonics, is also
possible. Comprehensive data re¬
view, editing and graphing routines
included. Tape includes sample
runs and memory saver version for
higher resolution. Needs at least
16K; listing and documentation $12;
listing, documentation, tape $17
ppd. MULTIPROGRAM gives multiple
program storage and assumes no pre¬
vious knowledge of MC programming;
step-by-step instructions take you
through block transfers. Needs at
least 16K, tape and instructions
$10 ppd. Battery back-up plans
with schematics and parts list, $10
ppd. Syncware Co., POB 5177, El
Monte, CA 91734.
f/22 Press cuts their 16K Darkstar
darkroom package (Oct.82 New Pro¬
ducts) to $400. Tape with instruc¬
tions, $49.95. f/22 Press, Bx 141,
Leonia, NJ 07605, 201/568-6250.
Hunter's 8K nonvolatile RAM board
kit now comes supplied one 6116LP3
(150ns) CMOS RAM at no extra cost.
Low power 6116 chip means lithium
should last 10 times longer—fully
populated board should retain mem¬
ory for about 2 years. Assembled
and tested version, $46.90; Kit,
$31.90 with P&H. Hunter, 1630
Forest Hills Dr., Okemos, MI 48864.
Draw and Recall lets you draw on
your TV screen and store picture
for later recall. Similar to Tur¬
tle graphics, enter an angle and
distance, and program draws the
line. Includes erase, move without
drawing, delete, display screen
position. Needs 16K, tape with
directions $6.95 +$1.75 P&H. Plan
displays with 8 1/2" x 11" graphic
grids, with line and column num¬
bers, X and Y coordinate numbers.
Pack of 100 $3.95+.75 P&H. New
newsletter for ZX/TS owners, first
issue free to SYNTAX readers; send
SASE. Trig Teacher program teaches
basic trigonometry, includes exam¬
ples. $6.95+$1.75, on tape with
directions. Needs 16K. Friendly
Computer, P.O. Box 122, Walling¬
ford, PA 19086.
In-Line Load Monitor helps you load
taped software every time. In-Line
Voltage Dropper lowers computer
voltage so computer and RAM pack
run cooler. Assembled with direc¬
tions, $12.95 each plus $1.50 P&H;
add 6% tax in NJ. M.C. Hoffman
Co., POB 117, Oakland, NJ 07436.
Big selection of ZX/TS-related US
and Canadian products. Free mail
order list for customers and full
product listing for prospective
dealers. Integrated Data Systems,
11 Brighton Ave., Toronto, Ontario,
Canada M4M 1P3, 416/466-5571.
16K tape programs: Math Raiders,
Superchess, Alpha and Vowel Tutor,
and Night Gunner. The Adventures
of Quest for the Holy Grail and The
Elusive Mr. Big K give you a new
version everytime you load. $14.95
each except Superchess, $19.95.
Softsync, 14 East 34th St., New
York, NY, 10016. 212/685-2080.
Our latest list of new users'
groups is presented below. To
locate or announce a group not
listed, drop us a line (please
include self-addressed stamped
envelope) or give us a call at
617/456-3661. SYNTAX, RD 2,
Box 457, Harvard, MA, 01451.
Chateauquay, PQ, Canada: H. Oeder,
305 Radisson, Chateauquay, PQ,
J65 1W6 Canada, 514/691-4433.
Holly Hill, FL: Richard Sirekis,
941 Oleander Ave., Holly Hill, FL
Lubbock, TX: Wayne Hamlin, Box
6342, Lubbock, TX 79413.
Manhattan Beach, CA: J. Petersen,
2316 Walnut Ave., Manhattan Beach,
CA 90226, 213/545-9581.
Milwaukee, WI: The ULTRAGROUP,
6808 N. Park Manor Dr., Milwaukee,
Gainsville, FL: Timex Users Group,
3708 Newberry Rd., Gainsville, FL
32607, c/o Skipper's Electronics
Glen Aubrey, NY: Sinclair Computer
Users Society, P.0. Box 92, Glen
Aubrey, NY 13777.
Groton, MA: Sinclair users group
for people under 16. Aarre Laakso,
74 Ames Rd., Groton MA 01450.
M-64 $119. 9 £ t
129.95 WIRED & TESTED
IN STOCK. SAME DAY SHIPMENT
All standard features included, plus lower 8K
of RAM can be disabled in 2K segments to
allow PROM or peripherals to be added.
EXPAND YOUR 16K SYSTEM $59.95
If you have a Sinclair 16K RAM module and neecT
more memory, expand it to 32K and beyond by usinq
BYTE-BACK M-16 MEMORY MODULES.
You can’t connect two Sinclair 16K RAM modules together,
but you can connect one Sinclair 16 K and one or more BYTE-
BACK 16K modules to get all the memory you need
THOUSANDS IN USE WITH PROVEN RELIABILITY
M-16 $59 . 95 Kit. $69.95 wired and tested.
_ IN STOCK. SAME DAY SHIPMENT
BB-1 Control Module, with 8 relays, 8 leds
& 8 inputs. $59 Kit. $69 wire and tested.
__ IN STOCK! SAME DAY SHIPMENT
MODEM with RS232 Port $119.^,
90-Day Warranty On All Modules.
10-Day Return Priviledge
ORDER PHONE 803-532-5812
Add $4.95 shipping & handling to all orders.
BYTE-BACK CO. CHECKS
Rt. 3 Box 147 Brodie Rd. I
LEESVILLE, SOUTH CAROLINA 29070
Puerto Real, PR: ZX/TS Users'
Group, Sergio Perez Davila, Box
38, Puerto Real, PR 00740.
Santurce, PR: Max Ramirez de
Arellano, Box 6759, Santurce, PR
SYNTAX ERRORS: Crash Guard, Jan.
New Products, was listed at $10.95.
Actual price is $19.95.
John Jarrett of Computer Engineer¬
ing Services called to say that his
video upgrade kit (adds SLOW mode
to 8K ZX80s) does in fact work with
new (bug-free) 8K ROMs if installed
properly (Dear Editor, Jan. 83).
Hint: the wire from point G must
be separate and as short as possi¬
ble. C.E.S. no longer sells com¬
plete kits. Printed circuit board
plus parts list and directions now
$12.95. Computer Engineering Ser¬
vices, POB 1222, Show Low, AZ
M.C. Hoffman's catalog, Jan. New
Products, costs $1 (refunded with
order). The clip is free.
Richard Cox sent this change
to speed play and add headings to
BLACKJACK (Jan.-Apr. 82) :
©05 PRINT RT
506 PRINT RT
755 PRINT RT
18,0; * YOU" ;TfiB t*;
Draw a heart with a valentine
message in the middle. You can
change the message with 210 PRINT
AT 6,11?"I LOVE YOU" and add your
name at the bottom with 220 PRINT
AT 18,20? "xxxxx" (replace xs with
your name). To run, GOTO 30.
Larry Allen, Owensville, IN
1© PRINT RT R,B;CHR$ 151
30 FOR R = 1 TO 4-
4-0 FOR B=ll-R TO il+R
50 GOSUB 1©
60 NEXT B
70 FOR B =20 —R TO 2© +R
S© GOSUB 10
9© NEXT B
10© NEXT R
110 FOR R=5 TO 9
120 FOR B=7 TO 21
13© GOSUB 1©
14-© NEXT B
15© NEXT R
16© FOR R~10 TO 17
17© FOR B=R—2 TO 33-R
18© GOSUB 1©
19© NEXT B
20© NEXT R
210 PRINT RT 6, 13; “HRPPV"; RT 7,
11; " URLENT INE **
SYNTRCTIC SUM: 224-3©.. 8K ROM
Combining Robert Nappi's Star
Hunter (Nov.82) and Dan Tandberg's
Blast Effects (Aug.82) with my own
programming resulted in Blast.
You fire your cannon by hitting
0. Hit 7 to aim the cannon up and
hit 6 to aim down. To RUN, GOTO 2.
Inverse video lines are:
2 "BLAST—A SHOOT OUT"
60 "(space, 27 times)"
420 "YOU STINK—I WON"
60 LET R*=
7© LET B $ = ** XXXXXXXXXXXXXXXXXXX
30 LET G* = " ***********3-****-***
IQ© LET 1$ = **
11© LET u* = "
120 LET R=ll
130 LET B=©
14-0 LET 0 = INT CRND+20J +1
15© LET U =0+8
16© IF O—R >W—B THEN GOTO 14-©
IB© PRINT RT 8,25;P
20© PRINT RT R,B;"^»“
21© PRINT RT R + l ,B; "
22© PRINT RT R-i,B; **
23© IF INKEY$ = **6* ! THEN LET R=R —
24.0 IF INKEY$="7" THEN LET R=R +
258 PRINT RT O, «;"<+>"
26© LET U=U-R
27© IF U<2 RND RBS CR-OJ <2 THEN
26© IF U <2 THEN GOTO 12©
290 IF INKEY*="0" THEN GOTO 31©
30© GOTO 20©
31 © PRINT RT R,B+3;R*;RT R,B+3;
B*;RT R,B+3;G*;RT R,B+3;H*;RT R ,
32© PRUSE 5
34-0 IF R=0 THEN GOTO 350
35© SOTO 200_
36© PRINT RT 0,U;K*;RT 0,U;U$;P.
T 0,U;K$;RT 0,U;U*;RT 0,U;K$;RT
O, U; U*; RT 0,U; K*; RT 0,U;U$
37© LET P=P+1S©
38© PRUSE 2©
390 IF P > 150© THEN GOTO 4-5©
4-00 GOTO 12©
42© PRINT RT 0,U;"|
43© PRUSE 10©
44© GOTO 2©
46© PRINT RT 15,©;"YOU UGN",,,,
"WITH 9^1© LUCK RND l.«'l© BRRIN" ,
47© PRUSE 20©
49© GOTO 2
SYNTRCTIC SUM: 11515, BK ROM
ON GOTO STATEMENTS
James Eischen, Windsor, CT
1 SRUE "BLRS3"
2 PRINT RT 10,5;
3 PRINT RT 17,4;"PRESS RNY KE
Y TO STRRT"
4 IF INKEY*="" THEN GOTO 4
2© LET R=©
3© LET P=©
4© LET R=R+1
Many BASICS give useful ON...
GOTO...statements which, unfortu¬
nately, ZX/TS BASIC lacks.
Let's tell our computer ON A
GOTO 125, 385, 720. It goes to 720
if A=3. The computer goes to the
line which lies Ath in the list.
One way to mimic this command
is to substitute IF A=1 THEN GOTO
125, IF A=2 THEN GOTO 385 and so
on. These multiple IF statements
eat memory, but replacing ON A GOTO
with GOTO G(A) can work.
DIMension numeric array G with
as many elements as line numbers in
the ON...GOTO list; assign each
element in G with a line number.
Our example uses LET G(l)=125,
LET G(2)=385 , LET G(3)=720. Do
this in immediate mode (with no
line number) to save memory, then
remember to use GOTO 1 instead of
RUN to avoid erasing G.
Robert Nee, Maplewood, NJ
WHEN YOU FORGET SYNTACTIC SUM—8K
If you have just entered a pro¬
gram from SYNTAX or SQ and want to
check Syntactic Sum but neglected
to load the program, add the fol¬
lowing program and RUN 9600. You
can use either FAST or SLOW mode,
but SLOW takes some time. To check
that you have entered it correctly,
enter Syntactic Sum by itself and
RUN. "S" equals zero.
Lloyd Painter, Quakertown, PA
9600 LET 5=0
9601 FOR R=16509 TO PEEK 16396+2
9602 LET 5=5+PEEK R
96©3 NEXT R
9604- PRINT **S = '*; 5-7323
SYNTRCTIC SUM: 7323, 6K ROM
CONCATENATING MACHINE CODE—8K/IK
When you want to use two or
more machine language routines
in one program, there's no need to
load them separately. Since each
machine language routine is com¬
plete within itself, it can be
placed one after another in one
routine and individually called by
referring to their beginning ad¬
dresses. Converting machine code
to hexadecimal and writing the
resulting hex in a REM line makes
concatenation easy. The example
program contains the hex repre¬
sentation of the Syntactic Sum
program (Jun.81) and the Renumber
Before you typing or loading
(regardless of attached memory),
POKE 16388, 198
POKE 16389, PEEK 16389-1 and NEW
to reserve memory for ML routines.
Type SAVE, RUN and write down
the displayed values. The first
value shown is the beginning ad¬
dress of the first routine (Syntac¬
tic Sum). PRINT USR that value to
get Syntactic Sum. The second
value represents Renumber's start¬
ing address. RAND USR that value
Renumber makes the first line
of the program 10 and increments by
10. It does not renumber GOTO and
GOSUB destinations. You must edit
In line 4, 16628 was calculated
by adding 2 less than the number of
characters in REM line (114) to the
address 16514 (16514 is the address
of the first byte of machine code
in line 10). In line 5, 16576 is
the number of characters in the
first routine (62) added to 16514
and marks the beginning of the
second routine. Number 198 in the
above POKE is 256 less half the
total number of characters, 58.
Line 2 gets the beginning
address of the first routine and
line 5 gets the second routine.
Line 6 PEEKS hex from the REM line,
and converts it to decimal, then
POKES it to reserved memory.
Rolf L. Miller, Ventura, CA
1 REM 217D4.0ED5B0C4-0DD2100007
2 LET R=PEEK 163S8+PEEK 16389
3 PRINT R
4- FOR X = 16514- TO 16626 STEP 2
5 IF X=16576 THEN PRINT R
6 POKE R, (PEEK X-23> +16+PEEK
7 LET R=R+1
6 NEXT X __
SYNTRCTIC SUM: 14-&84-, SK ROM
giimgMB s ®f m m m
HARDWARE AND SOFTWARE PACKAGES
MAKE THE MOST OF YOUR TIMEX SINCLAIR 1000
• 16K RAM # PL7002 $ 59.95
• 32K RAM # PL7003 $109.95
• 64K RAM # PL7004 $179.95
• HIGH RESOLUTION GRAPHICS (16K RAM)
# PL7007 $144.95
• PLUG-IN KEY BOARD # PL7011 $99.95
• CENTRONICS PARALLEL INTERFACE # PL7005
• MEMOTECH RS232 INTERFACE # PL7006
• SEIKOSHA GP-100A PRINTER The revolutionary low-
cost dot matrix impact printer—Uses up to 9.5” paper
# PL7008 $349.00
• SEIKOSHA GP-250X PRINTER The most intelligent
programmable graphic printer—Uses up to 9.5” paper
# PL7009 $449.00
• PRINTER-INTERFACE CABLE #PL7010 $19.95
• MEMOCALC Software on plug-in EPROM cartridge—
Spread sheet analysis—Up to 7000 numbers (when
used with 64K) # BS200C $59.95
• BILL ORGANIZER Keeps track of bills, amounts due,
date due, finance charges, payments made, etc. Sum¬
marizes all data for tax purposes. # HM5001
• CHECK BOOK Balances and maintains your
checkbook. Finds all checks written to one payee easily.
Add a printer and it will even write checks for you.
# HM5002 $14.95
• ADDRESS BOOK Store, update and retrieve names,
addresses, and phone numbers. With a printer attached,
it will print mailing labels, sorts entries alphabetically
by name, or by Zip Code. Only remember part of a
name? It will find records from incomplete informa¬
tion. Code the entries for special purposes, i.e.
Christmas Cards, Party Invitations, etc. # HM5003
• OCCASION CALENDAR Keep track of birthdays, an¬
niversaries, meetings and special events. Have your
calendar appear on the screen at the touch of a key.
# HM5004 $14.95
All programs use 16K RAM.
QSAVE A Hardware-Software Combination—
Allows a baud rate of 4000 to be achieved com¬
pared with only 250 on the normal SINCLAIR
ZX81—Loads and saves a full 16K in only 29
seconds—Works with 16K and 64K. # PL7001
Dealers and Distributors Inquiries Welcome
| Mail to: Intercomputer, Inc., P.O. Box 90, Prudential Center, |
| Boston, MA 02199 |
PART # QTY. UNIT U.S. $ TOTAL
PART # QTY. UNIT U.S. $ TOTAL
Shipping and Handling
Shipping and Handling
Memotech Products and QSAVE
Mass. Residents Tax
□ Check □ Mastercard □ Visa
City State Zip
• EDUVENTURE I Answer the questions encountered
in each classroom until you make it outside for RECESS
and the surprise that awaits you there. (Grade level K-3)
# ED3001 $12.95
• EDUVENTURE II Each new situation requires either
your ingenuity or knowledge (or both) to avoid being
sent to the principal’s office. (Grade level 4-6)
# ED3002 $12.95
• EDUVENTURE III Solve complex puzzles to outwit
your teacher and achieve the highest scores. (Grade
level 7-9) # ED3003 $12.95
• EDUVENTURE IV An agile mind and quick reflexes
will get you through this maze of mysterious situations-
to your DIPLOMA. (Grade level 10-12) # ED3004
All programs use 16K RAM.
NEW products coming soon: Software on ROM/EPROM
CARTRIDGES—SOFTBOXtm . A software library which
can contain several ROM/EPROM programs. Plug in your
computer and instantly call any program from your
SOFTBOX — A full line of software and peripherals
for the "colorful ZX SPECTRUM/TIMEX
For more information, Free Brochure, and
Special Package Discount, write or call:
IC INTERCOMPUTER INC.
P.O. Box 90, Prudential Center
Boston, MA 02199 Tel: (617)437-1190
Telex: 951141 COFAR
•MISSILE LAUNCHER Challenge the enemy by
destroying his ammunition stored in different locations.
# FG1002 $12.95
• KRAZY KONG A new version of the popular arcade
game. This program has all the features of the original
and is every bit as fast. # FG1013 $12.95
• GHOST HUNT Gobble your way through a maze of
Ghosts, Power Pills, etc., etc., very fast. # FG1014
• MAZE DRAG RACE Drive through a giant maze 9
times the size of the screen, watch out for other cars,
rocks, oil and ice. A really superb machine code
game. #FG1015 $12.95
• DEMOLISHER Design an intelligent strategy to
demolish a growing wall before it crushes you.
# FG1005 $12.95
• MCODER Compiles a BASIC program into machine
code—Extremely simple to use—Write and debug your
Basic programs—Enter the MCODER—the Basic pro¬
gram will be compiled into machine code as you
watch. # PT4001 $18.95
• RETURN FROM SPACE # FG1001 $12.95
•JEOPARDY # FG1003 $12.95
• VEGAS # FG1004 $12.95
• AIR ATTACK # FG1006 $12.95
• GUARD THE PRESIDENT # FG1007 $12.95
•SUBMARINE #FG1011 $12.95
• COMBO PACK I Contains Return From Space and
Missile Launcher # FG1008 $18.95
• COMBO PACK II Contains Vegas and Jeopardy
# FG1009 $18.95
• COMBO PACK III Contains Demolisher and Air Attack
# FG1010 $18.95
• COMBO PACK IV Contains Guard The President and
Submarine # FG1012 $18.95
All programs use 16K RAM.
Limited warranty—Defective Software will be replaced if returned within
30 days.—Memotech Products: 180 days—Seikosha Printer: 90 days
Price: $19.95 plus $2.50
ROM/RAM required: 8K/16K
Printed listings? No
Program listable? Yes
Zeta's Reversi offers many im¬
pressive features. Machine code
makes it quick and responsive. You
choose among three modes of play
and ten functions. You can play
against the computer or your ZX/TS
can play both sides.
One function calls a list of
possible moves giving coordinates
and a rating of + (plus) or -
(minus) 0 to 9. This list can be
used by both computer and player
The keyboard you have
been waiting for!
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
and lets you see how your ZX/TS
decides what move to make. This
function takes from 6 to 40 seconds
depending on the number of possible
moves and your choice of FAST or
SLOW. There are ten levels of play
but the response time is about the
same for each? 3 seconds in FAST
mode and 12 seconds in SLOW mode.
Entire game listings of com¬
pleted moves may be called up on
screen at any time. Or if you are
unable to complete a game you can
save your game that's in progress
for later play.
It says in the catalog you can
take back moves but, I found this
somewhat misleading. With each
move, your choice appears on the
display board with an option to
enter or delete your choice. You
also can alter your position by
entering coordinate and color one
disk at a time. This can be tedi¬
ous if you want to enter a middle
or end game position.
If you were a U.S. Othello
Association member you might be
disappointed in Reversi. Starting
disk placement is off by a 90 de¬
gree rotation. Also its style of
play seems to have been taken from
refuted strategies of Hasegawa's
book How to Win at Othello . Your
ZX/TS computer takes an opportunity
to take the lead as soon as possi¬
ble and flips way too many disks
for opening and midgame play.
Playing Zeta's Reversi against
Fidelity's Reversi gave interesting
results. With Zeta's Reversi at
its highest level in all games it
lost as black and white against
Fidelity's Reversi at its lowest
level. But with Fidelity's Reversi
at level 10 (of 18 levels) Zeta's
Reversi did much better losing as
black 31-33 and winning with white
by a wipeout at move 30.
For those players who have not
studied or played Othello exten¬
sively, Zeta's Reversi provides
David Ratliff, Magee, MS
Games that chalknge you at a price that won't
01 E2-E4- E7-E5
02 B1-C3 B8-CB
03 F1-C4 D8-G5
04- B 1 —R3
04- D1-F3 G8-F6
05 F3-D3 G5-G2
06 C3-R4- G2-H1
07 H2-H4- Hl-Gl
'OUR MOUE WITH THE 6|
a EETO KNOTS oil
8CN R -
GESR HQ p|l
MIXED GAME BAG
Look to Sinclair for the only $79.95
computer and the first Serious Games Package.
A special limited time offer. Call toll free today.
What could be more challenging than creating
your own games on a personal computer? Or being
intellectually challenged by serious games where
you match wits with a computer or another
opponent in a fierce trial of skills?
The Timex/Sinclair 1000* is a fully program¬
mable computer with a powerful BASIC language
and complete instruction manual, all for only
$79.95. The moment you sit down with the
TS1000 you can learn how to program your own
games. Maybe you want to create a stock market
game, a word game, a mathematical game.
The challenges are endless.
For this one low price, the TS1000 comes with
everything you need for connecting the computer
to your color or black-and-white TV.
Of course, you might also want pre-programmed
software cassettes for your $79.95 computer.
You’ll have a wide choice with our free software
catalog which comes with the TS1000. And the
software cassettes play in any cassette recorder.
The 16K Memory Module. More power to you.
Let’s say you want to go one step further. The
16K Memory Module allows you and your family
to be challenged by even more sophisticated
games. Not mindless arcade games, but serious,
intellectually stimulating games which are both
fun and educational.
The Memory Module costs only $49.95 and
plugs onto the back of the TS1000 for 8 times
more memory capacity. A whole new world of
software is available to those with the 16K
The Serious Games Package.
_ A $75 value for only $50. _
For those who want a lot of serious 16K games,
Sinclair announces a special software offering
with a $25 savings! Now, for the first time, you
can receive all five games shown above at the
reduced price of only $50.
Chess: You can play with another opponent or
you can match wits with the computer.
Flight Simulator: Maneuver and land a light
aircraft with full cockpit controls, instrumenta¬
tion and navigational aids. You have to allow for
wind velocity and direction, rate of descent and
Cube Game: Every bit as mind-baffling as
Backgammon: Everyone’s favorite. Again, you
can play against another opponent or against the
computer. Complete with a doubling cube.
Mixed Game Bag: A series of memory and con¬
centration tests including Robot Wars, a version
of “Master Mind’.’
There’s never been a better value on a serious
games package. And to think it all starts on a
_ Why order today? _
In addition to saving $25 on software, there are
other reasons to buy your TS1000 today. Com¬
puters costing hundreds and even thousands of
dollars rarely offer you games this serious or
Another reason to order today is convenience,
by toll-free phone. No crowds, no waiting lines,
no parking worries. It’s never been easier to get
started in the world of computers. Or more
How to order today!
Just call our toll-free number and use your
MasterCard or VISA. Or send the coupon with a
check or money order. Then try out the Timex/
Sinclair 1000 for 10 days at no risk. If you’re not
entirely satisfied, we will refund your money. It’s
as easy as that. (Sorry, no refunds on software.)
Call toll-free: 800-543-3000. Ask for operator
509. In Ohio call: 800-582-1364. Ask for operator
509. In Canada call 513-729-4300, operator 509.
Have your MasterCard or VISA ready when
calling. Phones open 24 hours a day, 7 days a
week. These numbers are for orders only.
If you simply want information, please don’t
call, write Sinclair Research, Ltd., 2 Sinclair
Plaza, Nashua, NH 03061.
Call toll free 800-543-3000
Rd code: Mail to: Sinclair Research, Ltd.
j B2SX One Sinclair Plaza, Nashua, NH 030611
| □ Check or Money Order enclosed
16K Memory Module
(5 games valued
$ 5.00 |
**U.S. Dollars Total: |_
Cassettes for 16K Memory Module: ,$15.00 each.
Check the boxes of all the cassettes you want.
□ Flight Simulator #6 □ Mixdd Game Bag #26
□ Chess #7 □ Ill take all 5 cassettes
□ Backgammon #8 included in Sinclair’s
* Sinclair technology is the heart of both the ZX81 and the
Timex/Sinclair 1000 computer.
I noticed several letters
indicating dissatifaction using
a flat ribbon cable to add an
As an alternative, use number
28 or 30 wire-wrap wire. It posi¬
tions nicely between components and
exits at most any location between
Paul Hise, Jeffersonville, IN
If you hook your ZX/TS to an
on-line system or service such as
CompuServe, do you still have your
cursor system available? Will the
first key you press be the command
word above it?
Christopher Fickett, Burlington, MA
When you add a modem to your compu¬
ter, you use it with a program that
defines the behavior of your compu¬
ter. You can compare your ZX/TS
plus modem plus software to a game
program—while you use the game,
the program controls the behavior
of the keyboard and screen. Thus,
availability and utility of the
ZX/TS cursor system depends on the
software you use. Generally com¬
mand words will not be the first
response, nor would that be useful
since other systems would not read
the byte sent as a keyword.—KO
In the event anyone wants to
connect a video monitor to the
ZX/TS, the procedure is:
1) Open the case and expose the
side of the board with ICs and RF
2) Open lid of the RF modulator.
3) Remove all connections from
output of the modulator.
4) Leave the three connections
removed, tied together.
5) Solder plastic coated copper
wire (solid) to center pin of
output on the modulator (where the
three connections used to be).
6) Solder the other end of the
bare wire input to modulator (wire
closest to board edge).
7) Replace lid on the modulator
and close case.
This procedure is quick and
easy. The video monitor must be
set on "Hi-Z" only. The picture
is clear, sharp and stable.
Gerry Rolle, San Jose, CA
When I read the premier issue
of SQ, I was upset by the hardware
review of Touch-A-Matic keyboard
overlay. I use my ZX81 every night
for my users group, and find it
hard to type on a regular keyboard.
When I saw Kopak Creations' ad in
SYNTAX, I ordered it. Two days
later I received my Touch-A-Matic
in a neat envelope with directions.
What a difference Touch-A-Matic
made on my ZX81. I've encouraged
group members to purchase Touch-A-
Matic, and I'm happy to say we're
pleased with this fine product.
Michael Wilson, ZX Users of
America, New York
When loading a program from
tape is complete, my computer bombs
out. I played around with my tape
and found a recording flaw. Is
there some way of entering a fake
END statement so the ZX/TS thinks
that it has the whole program?
I have a long program that I
don't want to retype. The computer
takes 90% of it before it bombs
out. Would it work if I hit break
before the flaw and enter END? I
don't know machine code well enough
to try it.
John Broussard, Tucson, AZ
I don't know how to enter an END
statement to solve this problem.
But, with a ZX-99 Tape Controller
(Sept.82) you could read material
in, edit it, re-record it and load
the edited version. Check with the
Phoenix user's group, 602/846-2882;
't^o* '•°gS&* of »33i
sa# 3 *^
^pt^C ° u \\^ c °roP ^ te spo^ or0 e rA' ^s * 'o?c0^^osW c ' ( - 0 u\o^°' C dp'°^'
I sgSEsg^ss*^,- 'S«Sr^sJ?^ s
° ?e ^ese^'sSde^P o!
otw^S p- 3 "' 6 _ , 0 u< '“§go«ffSb?'
IS A MEMOPAK
If you own a Timex-Sinclair 1000 or
ZX81 computer, you should have a
Memopak behind it. From increased
memory to high resolution graphics,
Memotech has a Memopak to boost your
system’s capabilities. Every Memopak
peripheral comes in a black anodised
aluminum case and is designed to fit
together in “piggy back” fashion to enable
you to continue to add on and still keep an
integrated system look.
High Resolution Graphics
Order at no risk
All Memotech products carry our 10
day money back guarantee. If you’re not
completely satisfied, return it in 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 Memopak, return it to
us and we will repair or replace it free of
charge. Dealer inquiries welcome. Tb order
any Memotech product call our toll-free
number 800/662-0949 or use the order
7550 West Yale Avenue
Denver, Colorado 80227
1 64K RAM
J 32 K RAM
Centronics Parallel Printer Interface
1 RS232 Printer Interface
* High Resolution Graphics
I Shipping and handling
*4 95 1
, * All prices quoted in U S dollars
. ** Colorado residents please add sales tax
J □ Check □MasterCard □ Visa
' Account No
I Addrot 1
Memopak 64K RAM The 64K RAM extends the
memory of your Sinclair by 56K to a full 64K. It
is directly addressable, user transparent, is
neither switched nor paged and accepts such
basic command as 10 DIM A (9000). The
Memopak 64K turns your Sinclair into a
powerful computer suitable for business,
recreational and educational use. No additional
power supply is required.
Memopak 32K RAM The 32K RAM Memopak
offers your Sinclair a full 32K of directly
addressable RAM. Like the 64K Memopak, it is
neither switched nor paged and enables you to
execute sophisticated programs and store large
data bases. It is also roily compatible with
Sinclair’s or Memotech’s 16K RAM to give you a
full 48K of RAM.
Memopak 16K RAM The Memopak 16K RAM
provides an economical way to increase the
capabilities of your Sinclair. And at the same
time, it enables you to continue to add on other
features with its "piggy back” connectors. It is
compatible with the Sinclair 16K or a second
Memopak 16K or Memopak 32K to give 32K or
48K of RAM respectively.
Memopak High Resolution Graphics The
Memopak HRG contains a 2K EPROM monitor
and is fully programmable for high resolution
graphics. The HRG provides for up to 192 by 248
Memopak Printer Interface The memotech
centronics parallel or RS232 printer interface
paks enable your Sinclair to use a wide range of
compatible printers (major manufacturers’
printers available through Memotech at
significant savings). The resident software in the
units gives the ASCII set of characters. Both
Memopak printer interfaces provide lower case
character capabilities. The RS232 Interface is
also compatible with modems.
New products coming soon Memotech will
soon be introducing four new Sinclair
compatible products: a high quality, direct
connection keyboard, a digitizing tablet, a 16K
EPROM and a disk drive. Watch for our future
MEMOTECH INTRODUCES THE ZX81/TS-1000 KEYBOARD
The Memotech keyboard is a high quality standard (typewriter) keyboard, with Sinclair
legends. The keyboard is housed in a well engineered and elegant aluminium enclosure.
It is cable connected to the accompanying buffered interface which is housed in a
Memopak case and plugs directly onto the
back of the computer. As with other
Memotech products, the piggy-back tradi¬
tion is maintained, allowing other add-ons
to be plugged onto the back of the interface.
Priced at $99.95 (Plus $4.95 for shipping and
THE FOLLOWING PRINTERS ARE ALSO AVAILABLE THROUGH MEMOTECH
SEIKOSHA GP 100
The Seikosha GP 100 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. Character spacing is 10 characters/inch with line spacing of
6 lines/inch or 9 lines/inch. The printer uses standard fanfold paper up to 9i inches
wide. The GP 100 utilizes a standard parallel interface (Centronics compatible).
Priced at $399JOO including Centronics parallel interface & cable. (Plus $9.95 for
shipping and handling).
SEIKOSHA GP 250
The GP 250 is also manufactured by Seikosha, the leading company of the Seiko group
It uses a 5x8 dot matrix printing format with ASCII standard upper and lower case
character set. Printing speed is 50 characters/second with a maximum width of 80
characters. Character spacing is 10 characters/inch. The GP 250 also uses paper up
to 9£ inches wide. This printer utilizes either standard parallel Centronics interface
or serial (RS232, DIN connector) interface.
Priced at $449jOO including Centronics parallel interface & cable. (Plus $9.95 for
shipping and handling).
The Prowriter 8510 is a Leading Edge product. It uses a 7x9 dot matrix printing format
with ASCII standard upper and lower case character set. The printing speed on the 8510
is 120 characters/second with a maximum width of 80 characters. The 8510 utilizes a
standard Centronics parallel interface.
Priced at $649.00 including Centronics parallel interface & cable. (Plus $9.95 for
shipping and handling).
To order any of the above items, call Toll Free 1 800 662 0949 or write:
7550 W. Yale Avenue, #200
Denver, CO 80227
Mastering Machine Code
on Your ZX81
Reston Publishing Co.
c/o Prentice-Hall, Book
Route 59 at Brook Hill
Dr., W. Nyack, NY 10995
Many things bother me about
Toni Baker's book. But, this book
is invaluable if you want to expand
your programming potential and
stretch your ZX/TS to its limits.
If you're disenchanted with
sluggish ZX/TS graphics or limited
number of BASIC commands, then
you're ready to move into machine
language. Baker's book gives you
an easy intro to machine code and
focuses on your ZX/TS computer
rather than the Z80 microprocessor.
Toni Baker's book is written
for ZX/TS users who know BASIC but
A ZX-81 breakthrough!
• Load or store 27K
bytes in less than 30 seconds.
• Your existing cassette-stored pro¬
grams transfer easily.
• Menu-driven, access by keyboard
• Second drive easily added for greater
• For T/S 1000, ZX-81 and ZX-80.
• Requires CAI/O Board for interface $69.95
Order by phone or mail. Check, money
order, VISA or MasterCard (include
number and exp. date). Post, in U.S. $5
PO Box 2032, Midland, Ml 48640
©Copyright 1982 CAI Instruments, Inc.
517 - 687-7343
have no background in machine lan¬
guage. She begins with an elemen¬
tary explanation of hexadecimal
math and ends by disassembling the
ZX81 ROM. She occasionally pauses
to patiently explain instructions
and routines. She also illustrates
more difficult concepts by using
them in such programs as Life,
Spirals and Draughts. Baker also
includes a program that lets your
ZX/TS generate two whole octaves of
musical notes. In my opinion, this
program alone makes Mastering
Machine Code worth its price.
Toni Baker's writing, or more
correctly, teaching style is infor¬
mal, almost chatty. She encourages
you to experiment and modify pro¬
grams to reinforce newly acquired
skills. Although Baker's Mastering
Machine Code progresses slowly, it
encourages you to think through
each process before going on. The
end results are faster execution of
your programs and better use of
your machine's memory.
I found several aspects of the
book disappointing. It wasn't un¬
til Chapter 2 that I realized that
Mastering Machine Code was written
for both ZX81s and ZX80S. What a
surprise! No mention is made of
ZX80S in the title, introduction
or back cover blurb. Interruptions
in narrative to explain "old ROM"
and "new ROM" differences should be
mentioned earlier on.
It is painfully obvious that
Mastering Machine Code is some
kind of photo reproduction of typed
manuscript pages. For the $12.95
price I feel entitled to a properly
proofread, typeset book. I also
found local British idioms to be
disconcerting—and in places they
obscure Baker's meaning.
Mastering Machine Code covers
a difficult subject, but if you de¬
vote some time to your ZX/TS com¬
puter and Toni Baker's book you'll
end up speaking a language other
John Connell Jr., Middletown, RI
M Touch - A - Mat ic ”, Power
At Your Finger Tips!
KOPAK'S TOUCH-A-MATIC™ gives you the power to type more accurately
and much faster. It requires no wires, no soldering. Comes with complete
instructions. It's as easy as removing adhesive backing and pressing into
position. Positioning is easy. Once in position, you are ready for touch¬
typing with ease.
Our unique vinyl-key-hold creation will guide your fingers to the correct
keys. Finally, touch-typing now possible with your Sinclair* or Micro-Ace*.
This remarkable product, as well as other KOPAK items, are now available.
Call now to order through MC/Visa or send check/M.0. to Kopak Creations,
TM Trademark of KOPAK Creations, Inc.
Sinclair* is a trademark of Sinclair* Research LTD.
MicroAce* is a trademark of MicroAce*
$1.50 Handling Charge
KOPAK CREATIONS, INC.
Master Charge & Visa Accepted
KOPAK Creations, Inc. Dept.SXI P.O. Box 1076, New York, NY 10019 (212)757-8698
HARDWARE TIP—KEYBOARD CONVERSION
If you plan to try the keyboard
conversion shown in SQ (premier
issue. Winter 82), try using a 16-
pin DIP socket (wire wrap), cut in
half for plugging your keyboard
cable into your ZX board. Use this
simple plug as a connector to any
keyboard or joystick. (For a photo
of the board, see SQ Winter or the
chapter entitled "How the Computer
Works" in the ZX/TS manuals.)
You don't need to remove 5-
and 8-pin connectors shown in fig¬
ure 3 (SQ Winter 82, p.28). After
going to the trouble of saving the
double-sided tape when you opened
your case, it seems silly to void
your warranty and physically modify
your ZX/TS when you can use a $.50
part for a connector.
Original keyboard connector
sockets have pins on 0.010" cen¬
ters. This is standard DIP (dual
in-line pin) socket spacing. Get
a 16-pin DIP socket (preferably
wire-wrap type) and cut connecting
bridges to create two 8-pin single-
in-line packages (SIP). Strip the
5- and 8-wire cables from your new
keyboard and plug them into appro¬
priate pin holes on each SIP (dis¬
regard or remove the extra three
slots on one SIP), then solder in
place. Cut the long wire-wrap pins
off to about 1/4" and insert in
Paul Donnelly III, Centerport, NY
MELBOURNE HOUSE SOFTWARE
"THIS BOOK SHOWS JUST HOW
MUCH CAN BE CRAMMED
TINY RAM CHIPS!" &
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
□ 25895 The Complete Basic Course $34.50
□ 25957 Machine Language Programming
Made Simple $14.95
□ 20922 The Complete Tlmex/Sinclalr
ROM Disassembly $19.95
□ 26025 Not Only 30 Programs $9.95
□ 25913 Understanding Your 2X81 ROM $14.95
13941 Gamestapel:llPrograms-lK $14.95
13942 Gamestape2:3Games-l6K $14.95
13943 Gamestape 3: Catacombs
13944 Gamestape 4:3D Monster Maze-16K $14.95
13945 Gamestape 5:3D Orbiter-16K $14.95
26446 Space Trek-16K $14.95
26359 Super invasion-IK $14.95
26318 wail Busters-lk $14.95
26472 10 Exciting Programs-lK i $14.95
26284 Reversi-IK $14.95
1 26406 Toolbox-IK $14.95
] 26490 Basic Course 2 cassette pack $7.50
] 14026 Combat Flight-16K $14.95
Residents of CA,MD,TN,
please add sales taxes: _
Add $2 for Shipping & Handling,
foreign orders add $6: _
Enclosed is my check or money order for $
Please charge my Visa or r MasterCard Card#_ expiration date
Product: JK Audio Model JK-310
I/O Board with Real
From: JK Audio, P.0. Box 3295,
Escondido, CA 92050-0580
Price: $59.95 (assembled and
tested) plus $3.95 (P&H)
JK-310 is ideal for your appli¬
cations and projects that require a
JK-310 uses an OKI semiconduc¬
tor MSM5832 real-time clock chip.
It runs independently of your
computer and is addressed directly
from software when needed. Battery
backup is provided for, so you just
program the day, date and time once
and forget it.
JK-310 is an impressive piece
of hardware. It has its own 5-volt
regulator and an interesting multi¬
plexing scheme. It runs four memo¬
ry locations into both the clock
read and write ports and up to
eight 8-bit inputs or outputs. It
comes set-up with edge connector
access to control port for further
multiplexing, clock, one buffered
8-bit input port, a buffered 8-bit
output port, and direct access to
the data bus. JK-310's standard ZX
bus connector is compatible with
RAM packs, etc. The package uses
four memory locations, 16380-3.
MSM5832, running with a 32
kHz clock, keeps automatic track of
seconds, minutes, hours, day and
date, month, year and even leap
year. It is accessed by a POKE
which tells the hardware which
digit you want to know and a PEEK
which looks at the digit. JK
provides BASIC software (using 2K
RAM or less) to get time data and
then print it out.
Both clock and I/O ports use
74LS374 & 74LS139 logic chips to
decode 4 memory locations into
various port configurations and
simulate more expensive peripheral
I/F adapter chips. This decoding
scheme brings 6 more I/O control
lines to the 44-pin edge connector.
On the negative side, output
ports can only sink about 40 mA,
which isn't enough for common 5V
relays. This means another power
supply would be required. For
example, if you have another trans¬
former, a 24 volt relay would be
sufficient for 40Ma. (JK Audio
says Radio Shacks DPDT with 12VDC
coil, #273-213, works fine.—Ed)
JK-310 is professionally de¬
signed mechanically and electri¬
cally. Complete schematic and data
on the OKI time chip is provided.
Documentation, however, is sparse
and hard to follow. You'll also
need 3 NiCad AA batteries. Check
the supplied battery holder polar¬
ity; mine was backwards.
JK-310 is a powerful ZX/TS
addition. With simple interface
circuits (schematics provided), you
can use it for many applications
where exact time is important.
Paul Donnelly III, Cente rport, NY
Not just another newsletter, Sinclair Computing is a
typeset magazine with color illustrations, published
monthly. If you own a Sinclair or Timex/Sinclair
Computer you need Sinclair Computing. Every issue is
packed with informative Articles, New Products, Users
Groups, News Bits, Letters, Ask Sinclair Corp., Reviews,
Tutorials, Hardware Projects (many for under $10),
Programs, and Games.
FOR JUST $2.95 PER ISSUE
YOU CAN MAKE THE MOST OF YOUR
SINCLAIR or TIMEX/SINCLAIR COMPUTER.
If after your first Issue you are
not fully satisfied...cancel your
subscription for a FULL, refund.
Gtenmont New York 12077
□ I want one year for just 836.
□ I want two years for just 865
Enclosed Is my check or money order
TIMEX/SINCLAIR 1000 DISPLAY
TO FULL COLOUR GRAPHICS
LOOK AT THE FEATURES ! ! !
* Plugs into ZX81/1000 (edge connector)
* All text will run on the color tv
* Module contains it's own memory
* User defined characters & graphics up to
* Latest technology with TMS9918 VDP
(32 sprite levels)
* Module contains extension of basic commands
SPRITE/OUT/INP / etc.
Use your KOLORWORKS immediately with a
game cassette for $9.95
This delightful game is designed for hours of fun using some
of the color graphic capabilities of KOLORWORKS. The
cassette also contains a short program to familiarize you
with some of the commands and graphics.
MOD TO USE HUNTER RAM WITH > 32K
Hunter tells us that their
nonvolatile RAM board (reviewed in
SQ, Winter 82) requires modifica¬
tion to work in systems with more
than 32K conventional RAM.
Remove 74LS139 (IC5), bend pin
1 up and over pin 2 without con¬
tact. Buy a 74LS32 (available from
Radio Shack), bend pins 1 and 2
directly out, pin 3 out and under
pin 2, pins 7 and 14 sideways, and
cut off pins 4-6 and 8-13. Mount
the 74LS32 on top of the 74LS139
with pin 1 above pin 1 and solder:
Solder 1" insulated
flying leads to
pins 1 and 2
the two ICs into the
socket for IC5. Sold er o ne lead to
A15 and the other to MREQ on the
edge connector. This completes
decoding on the Hunter RAM board.
BRAINCHILD COMPUTER WORKS, INC.
P.O. Box 506
Pewaukee, Wl 53072
Price + Qty._Amount
Shipping and Handling
Wi. Res. add Sales Tax
My Dcheck D money order enclosed
City State Zip
Please allow six to eight weeks for processing. Thank you.
For further information - Send $2.00 (credited to order)
Joystick Ports / Sound / Cartridge Slot
Title: Explosive Games for
By: Tim Hartnell
From: Reston Publishing Co., Inc.
c/o Prentice-Hall Inc., Book
Distribution Center, Route
59 at Brook Hill Dr., W.
Nyack, NY 10995
(softcover, 140 pp.)
Any ZX/TS owner with children
or a limited budget for commercial
game software will want a copy of
this book. Tim Hartnell covers a
wide range of games providing some¬
thing for everyone.
49 Explosive Games is a dual
purpose book. The book's program
listings are also intended to
broaden your programming skills.
Hartnell says, "We've tried to en¬
sure that each and every program
contains at least one programming
technique which you'll adapt for
your own programs."
Hartnell lists games of all
imaginable types: mazes, adven¬
tures, racing and landing games,
and of course alien blast games.
He includes Life, Draughts (Chec¬
kers), and several unique pattern
generators. In some games you are
pitted against the logic of your
computer? in others your foe is the
insidious random number generator.
Hartnell's book gives many
hours of good fun in both playing
and programming "49 explosive
games." He is not overly concerned
with authorship pride. He invites
you to enjoy "...working with them,
altering them...deleting some sec¬
tions, improving others, and so on,
until the game carries your person¬
al stamp." In many cases he offers
hints on potential game improve¬
ments or ZX81 to ZX80 conversions.
When you consider the per game
cost is something less than 25
cents, you get a real bargain with
this book. Another bonus: IK and
16K games come with directions on
how to play them and programming
techniques used. ZX80 owners will
find 28 games for their machine.
One fault with 49 Explosive
Games lies in its visual presenta¬
tion. About two-thirds of program
listings are apparently reproduced
directly from ZX/TS printers. This
may build confidence that programs
are correctly listed and really
run, but it detracts from program
readability. Fortunately, Hartnell
foresaw this problem and repeats
troublesome keystroke patterns.
Inverse graphic and alphanumeric
characters suffer the most from
I strongly recommend this book
to any new ZX/TS owner and to users
who have children beginning to take
interest in programming. Some ZX81
veterans will find this book inter¬
esting too, but many will have al¬
ready progressed beyond the scope
of 49 Explosive Games.
You can reach almost 9,000 ZX80/81
and TS1000 users for just $9/line
in SYNTAX classsified ads. Send
your ad copy, typed 35 char./line
(exactly as you want it to appear)
with a check or money order (No
CREDIT CARDS OR PHONE ORDERS,
please) to arrive by the 15th of
any month. Your ad will appear in
the next month's issue. To repeat
an ad, send another ad order with
check by the 15th. We take no
responsibility for advertisers.
Include your telephone number,
whether or not the number appears
in ad copy. SYNTAX Classified Ads,
RD 2, Box 457, Harvard, MA 01451.
From the SYNTAX bookshelf:
Zilog Z80A CPU Tech Manual, $7.88?
Assembly Language Programming
Manual, $15.75? Crash Course in
Microcomputers, $21.45? ZX80
Pocketbook w/8K supplement SALE
$12.45, Expt. in Art. Intelligence,
$10.45, Back issues SYNTAX $4 each.
All prices include shipping.
SYNTAX, RD 2 Box 457, Harvard, MA
01451. For faster service use your
credit card 617/456-3661.
COMPUSETTE is a 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 $22.00 100 for $77.00
VISA MASTERCARD C.O.D.
TX 214-349-0081**OTHER 800-527-1227
10% Discount for Check with Order
P. 0. Box 38651*Dallas, Texas 75238
FREIGHT PREPAID*DEFECTIVES REPLACED
- STOCK OPTIONS -
ZX81/TIMEX 16K. Make objective
strategy decisions. Requires only
current option data. Program uses
Black-Scholes model for extensive
analysis. Ranking by: profit, loss,
expected return. Up to 9 options/
run? easy-to-use? full screen edit.
Tape,doc: $25 to Air Capitol Soft¬
ware, PO Box 12051,Wichita,Ks,67277
John Connell, Middletown, RI
SQ SPRING IS HERE! It's the
magazine for ZX/TS users $15/4 iss.
From SYNTAX, phone 617/456-3661.
M M M
ANALOG INTERFACE Read voltge & temp
High resolution ,00004V or.05 deg C
Requires no mods.C onnects to tapein
Add$3-US post==>Down East Computers
POB 3096.Dept F.Greenville,NC 27834
* PRICE SLASHED FOR 1983 *
*CUSTOM ATTACHE CASE formfit for *
*ZX80/81,TS1000 and hardware *
*As advertised in SYNTAX QTRLY. *
*$34.95 plus $3.50 P/H,send CK/MO *
*info send SASE COMPUTA-DEK 6009 *
*Kenwood Dr. Nashville, TN. 37215 *
"LOADSTAR" -RELIABLE PROGRAM LOADING
Unit For ZX-80/81/TS-1000 Computers
$40 (CA+6%) + $4 S+H To Cinevision
PO Box 546 Montebello CA 90640 Or
SEND SASE FOR MORE INFORMATION.
LAND THE SPACE SHUTTLE. (16K) VECtor
transformations simulate motion in
3-dimensions & test judgment/skill
Cassette$6.95 "DO LOOPS" WORKSHOPS
209 Maple, Harleysville PA 19438
Bill Organizer:Each$10.95Plus $1.50
P&H Send CK or MO To:DC ELECTRONICS
55 M ST NW #306; WASH DC 20001
* NEW C.R.C. * SMART* *SOFT FACE *
* INTERFACES PRINTERS TO SINCLAIR *
* Serial *Parallel* Uses No RAM *
* No User Routines ** Any Printer *
* Single Key Operation ** $109.95 *
* ******* C.R.C. SOFTWARE ******* *
* 16K PRACTICAL PROGRAMS FOR YOUR *
* Home And Family And Blank Tapes *
* Send $1.00 Refundable On First *
* Order For Catalog From *C.R.C. *
* 2901 AUBURN-AUBURN HTS. MI.48057*
STATES & CAPITALS*16K,DRAWS U.S.,
Quizzes State Name & Capital.Tape
$10 Or For Info,SASE TorKIMTECH
1608 23RD AVE NE MPLS,MN. 55418
MAZE MAN -fast MC maze chase S5/ LINE
RENUMBER(all MC does GOTO&GOSUB) $5
(SASE for info & free program)BROWN
SOFTWARE 53 CLIFF LANE LEV.NY 11756
M £1 T-SHIRTS 7.50 ppd S M L
Send check or money order to: Pecos
Star Co., Box 8348, Denton TX 76203
* C URE THE W OBBLES *
End RAM Crash, Easy Soldering Req'd
Fact.Compat. Send $12 RON PATTERSON
P.O. BOX 12134 ORLANDO FL 32859
DRIVE A VIDEO MONITOR WITH YOUR
ZX-81. Our DVC-1 direct video kit
is only $9.95. With the DVC-2 you
can switch select normal or REVERSE
VIDEO ; kit $20.45, fully assembled
$31.45, installed $44.95, Get super
sharp character definition with our
12" B&W video monitor,$98.45.Random
Access,Box 41770S,Phoenix,AZ 85080
AT LAST: REVERSE VIDEO FOR THE ZX81
WHITE LETTER ON A BLACK BACKGROUND
FITS INSIDE CASE-ONLY 4 CONNECTIONS
send check or money order $15.
SIGHT AND SOUND ELECTRONICS
1120 Bailey Hill Rd. #10
**FREE GAME PROGRAM! Send Stamped**
♦Envelope To:ZAMIS ENGINEERING,251*
**First St.,Perrysburg,Ohio 43551**
*********** R co TECHNICAL***********
save text using powerful editing
functions. Supports ZXpr inter .Great
for notes,reports. $9.95
DISTACALC -Calculates great circle
distance and azimuth between any 2
points on earth using lat/longitude
File area holds 200 cities.Great
for hams-remarkably accurate.$11.95
Tape&manual-16K req.Add $1 postage.
RCO PO BOX 733D ST ANN MO 63074
** ADD MEMORY THAT WON'T FORGET 1 **
* Now supplied with 6116LP-3 CMOS *
*Assembled & tested version $46:90*
* kit $31:90 SASE details: HUNTER *
*1630 Forest Hills OKEMOS MI 48864*
****** READ THE REVIEW IN £Q ******
SINCLAIR/TIMEX INTERFACING TO
ANALOG and DIGITAL Devices. J.V.
Kane And Co. 109 Ardmore Avenue,
ARDMORE PA 19003. 215-649-1782
*** THE DEFINITIVE TAX PROGRAM ***
Fr 16K ZX81/TS1000. EASY DATA ENTRY
AUTOMATIC TAX COMPUTATION FOR EACH
CHANGE, INCLUDING INCOME AVERAGING.
Info:SASE, Cassette:10.95. ** LQP
2365 Newcastle,Cardiff,Ca,92007 **
**ZX81/TS100 0...FINGERS SLIPPING?**
"ClearTouch" lets you feel your
keyboard, improves accuracy, speeds
input. No modificatons reqd. $9.95
$1.50 shp(Wa. res. 5.9% tax) chk,
MO, Visa/MC give No. & Exp. date.
CT, Box 1136, Anacortes, Wa. 98221
KEYBOARD CONVERSION, thorough instr
ZX 80/81, T/S 1000. Reset, Edit.,
etc. 10 shift key. $3. No shipping
charges. VIDEO UPGRADE ± DIRECT
VIDEO. $1. 16K GOT THE WIGGLES?
Send $1. IMPROVED HEATSINK $3.
W rite : Spectra, 2509 N. Campbell,
Box 295, Tucson, AZ 85719
* FREE NEWSLETTER 8 page
****** Send SASE to Friendly, Box
* 122, Wallingford, PA 19086
DISCOUNT PRICES: dir.import 16K
Rampak w/ edge connector 54+2
postage. Full size keyboard
houses computer 72+3 MINDWARE
printer 117 + 4 Q-SAVE 36 +2.full
size printer 325 + 7 Write for low
prices on EPSON,OKIDATA,AXIOM prin
ters. 10-15% discount on all
software from SOFTSYNC,DATA ASSETTE
GLADSTONE and others. Ask about
our disc drives and SPECTRUMS.
Send payment w/order to SIMPLY
SINCLAIR POB 480 WDBG,VA 22194
***** METAGRAPHICS *****
USE THE FULL GRAPHICS POTENTIAL OF
Your ZX81/TS1000 (16K RAM). 2048
CHARACTERS ! BASIC+M/L GIVES YOU
TOTAL ARTISTIC CONTROL. SEND $12.95
******** CALLIOPE SOFTWARE ********
4130 COE DR. NE, ALBUQ., NM 87110
24 ENTERTAINING & USEFUL PROGRAMS
On Top Quality Tape *REQUIRES 16K*
Listings Only $8.95 *TAPE $17.95
Send SASE for FREE Detailed info to
K-TOWN 16K SOFTWARE
4212 CROSBY DR.,KNOXVILLE,TN. 37919
WILBUR FROM WOX Cassette & Manual
Tested educational micro-movies
Four 16K programs for K-3rd grade
$9.95 pp USA. Send check/MO to:
***** MIDLAND MICRO MAGIC *****
RR#2 (291-A) Murphysboro IL 62966
*** QUALITY/AFFORDABLE SOFTWARE ***
1. Blackjack & Hi-Lo.$10.95
3. Escape, Snake & The Trap....$8.95
4.2K Game pack (5 games).$9.95
5.ZX/TS Quick Reference Card..$2.50
1,2&3-16K.Games use Video Graphics!
Cal Res add 6%Tax.CK/MO to COMPUWIZ
Box 390078, Mountain View, Ca 94039
Dealer inquiries welcomed.
MULTI-FUNCTION WINKY BOARD II**New
SAVE filter cuts rampac "noise" for
clean easy loading tapes.DUPLICATES
any ZX/TS cassette. Solves LOAD
problems AND MORE! Tiny lxl 1/2"
open board interface needs no pwr
no mod $24.PPD $18.kit US/Canada
G.Russell RD1 Box 539 Centre Hall,
KEY LOAD CASSETTE short ML program
SAVEs those unLIST/unSAVEable cas¬
settes fr bkup 16K TS/ZX81 $10PPD G
Russell RD1BX539 CentreHall PA16828
Z81/TS1000 CANADIAN FEDERAL IN¬
COME TAX RETURN. 16K RAM. $9.95+
1.50 P and H. JM SOFTWARE, 1852
Appleford St. Gloucester Ontario
*** ZX/TS TOUCH TAB OVERLAY ***
Feel center of keys for positive
entry. No visual interference.
Pressure sensitive attach quick
& easy. Really works. $5.00 and
SASE. L-P Overlays, 631 W. Main,
Madison, In. 47250.
* CINOUEDEA HAS YOUR ADVENTURE! *
Castles & Creatures II .$ 9.95
Titans & Trolls II . 9.95
Wizards & Warlocks II.9.95
- New Series Three Software -
Castles & Creatures III .16.95
Galactic Gladiator III .16.95
For 16K ZX81/TS. Cassette with load
& play instructions. Send check to:
CINQUEDEA SOFTWARE, 214 INDIAN
CREEK DR., PEKIN, ILLINOIS 61554
"UNIVERSAL COIN COLLECTION" Menu
more! 8KR0M,16KRAM. Tape + manual
$10.95 + $1.50 S&H. NJ add 6% tax.
M.C.HOFFMAN CO., DEPT. SX2,
P.0. BOX 117, OAKLAND, N.J. 07436
***for TIMEX/SINCLAIR computers***
NEW BOOK :the WATCHMAKERS GUIDEBOOK .
product directory & more!-3.95
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 COMIC BOOK COLLECT — 10.95
UNIVERSAL BASEBALL CARD COLL —10.95
UNIVERSAL RECORD ALBUM COLL -10.95
Each program on cassette + manual
8KROM, 16KRAM. Please add $1.50 S&H
$1 for cat. (Refunded with order.)
N.J. add 6% tax. M.C. HOFFMAN CO.,
P.O. BOX 117, OAKLAND, N.J. 07436
*** STOCK MARKET CASSETTE (16K) ***
PORTFOLIO MANAGEMENT: Maintains
Records Of Securities You've Bought
And Sold. Analysis Provides 12 Dif¬
ferent Listings(Gains, Loss, Dates,
Yields, Etc.) Holds 100+ Securities
SIDE 2-PROGRAM FOR MARKET FORECAST.
$9.95 TO TELETEK CO? #15 CENTRAL WY
SUITE 169? KIRKLAND, WA, 98033
I/O BOARD_PRINTER INTERFACE....
8255 Board for Sinclair/Timexl000
3-Ports: 1-in,2-out or 3-out.PortC
Printer Interface for Centronics
style parallel port printer.
requires I/O board. $60
Professional Electronics,109 Ches-
ney Lane, Columbia,S.C. 29209
//2K Programs from 2-BIT SOFTWARE/ /
//Mind vs. Machine $9.95/ Free //
//catalog games/educational soft-//
//ware. 2-BIT SOFTWARE, Dept SY1,//
//13674 Boquita, DelMar, CA 92014//
MARBLES > MAZES AND SINK HOLES
A simple non-destructive game of
skill and logic for all members of
the family. 15 levels of play, from
very easy to extremely difficult,
each with 4 different screen types
giving 60 full-screen displays.
Score displayed as time taken. Auto
clock enforces time limt? auto run
and return to basic features. 100%
machine code program for ZX81 or
TS1000 with 16K RAM. Cassette $15,
Mass residents add 750 sales tax.
CHARLES DRURY, 40 WESTGATE RD #5,
CHESTNUT HILL, MA 02167
LEARN DATA HANDLING TECHNIQUES with
ZX Data Finder, a versatile file
manager for 16K ZX81s. All routines
thoroughly explained. Concepts and
dozens of memory saving methods are
analyzed. List/text $9.95-free info
Tom Woods Box 64 Jefferson,NH 03583
* GAMES, BUSINESS AND EDUCATIONAL *
Software For The ZX81 & T/S1000
For A Catalogue Send A SASE To:
BRONZE STAR SOFTWARE
PO BOX 265, CHICAGO RIDGE, IL 60415
ENHANCE YOUR ZX81-TS1000 SYSTEM
Beautiful walnut/cherry cabinet
Large keyboard, 6 dedicated keys
Reliable ribbon/card connectors
Improved heatsink and audiojacks
Space inside for expansion boards
More extras. SEND $1 & SPECS for
detailed quote."DO LOOPS" WORKSHOPS
209 Maple, Harleysville, PA 19438
***** ZX81 - TS/1000 SOFTWARE *****
ENTERTAINMENT - EDUCATION
STRATEGY - MASTERCODE 16K 9.95
EDUCATION- MATH DEFENSE 16K 9.95
ADVENTURE- BERMUDA SHORTZ 16K 14.95
REFERENCE- ZX81 POCKETBOOK 10.95
Add $1.50 Shipping For Each Item
GAMES - TEXT ADVENTURES - BOOKS
Send $1 P/H For Catalog & FREE Game
PO BOX 147 GRANDVIEW,MO 64030
OUR POLICY ON CONTRIBUTED MATERIAL
NEW & UNIQUE IN CANADA
INTEGRATED DATA SYSTEMS
11 Brighton Av Toronto Ont M4M 1P3
ZON-81 $61.60; Kayde 16KRAM,or4KROM
900 char graphics $75.60; Software
Mugsy; $14.60 ea Tank Trap, Marine
Rescue, Alien Invasion, Red Alert;
Mazogs $27.90; ZX Chess II $29.30;
Software from Orbyte; Home Budget,
Home Inventory, Mega Mind, Salvo,
$18.70 ea; Execusoft Series $128;
from Timeworks; Star Battle, The
Money Manager, The Electronic Check
book, $23.48ea; Robbers of the Lost
Tomb $20.71. Min ord $25 w/MO+$1.50
P&H. Outside Canada less 20% & send
that amount as US$.Ont res +7% PST.
Deliv 5wk ARO.Send for N/C CATALOG.
i-IPRINT BIG on your ZX80/81
! ADS IN !ltrs/figs 5 times larger!
! SYNTAX iCursor w/Edit Functions !
! PAYOFF 1BASIC (List Learn/Change)
i-!8K ROM/16K RAM !-!
Cassette w/instructions ! IT'S A !
Great window displays ! ! BABY !
Send check or m.o. today ! GIRL !
$7.95+$l S&H($2 out USA) !-!
MT-SOFT, BOX 2638, Aurora,II. 60507
FREE!2programs on tape.Write:Prog¬
rams,3763 W. Crocus, Phx, Az 85023
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
• 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.
SYNTAX is published
monthly by a wholly-owned
subsidiary of The Harvard Group.
Syntax ZX80, Inc.
RD 2, Box 457, Harvard, MA 01451.
12 issues, $29. Single issue, $4.
Publisher: Kirtland H. Olson
Editor: Ann L. Zevnik
Assistant Editor: Pamela Petrakos-
Editorial Assistant: Pamela K. Vinal
© Syntax ZX80, Inc., 1983. All rights
reserved. Photocopying prohibited.
YES! Please send me 12 issues of SYNTAX for $29.
□ My check for $29 is enclosed. □ Please charge my □ MasterCard
Make checks payable to: □ Diner’s Club □ American Express
SYNTAX ZX80, INC. □ VISA □ Carte Blafiche account
exp. date_bank number (MC only)_
Day PhoneJ_)_Evening Phone_i_)_
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BUSINESS AND HOME SOFTWARE TAPES
* THE MOST COMPLETE SOURCE OF *
SERVICES I£ NOW AVAILABLE FOR THE
COMPUTER ENTERPRNEUR. From Data
More! WRITE FOR FREE BROCHURE. We
Still have THE EXPANDABLE ZX-80 AND
ZX-81/ TS-1000 Too! 9.95 + 1.25 P&H
Also, VIDEO UPGRADE KITS FOR ZX-80
w ith 8K ROM. 32.50 + 2.50 P&H.
COMPUTER ENGINEERING SERVICES
P.O. Box 1222 ShowLow, Az. 85901
ZX PRINTER PAPER ROLLS-Bolder print
Paler metallic base. Quality & fast
service. SAVE! 3pac/$12 ppd . E. Al¬
varez, PO Box 1025, Oviedo FL 32765
$3.50 PPD BUDGET/FINANCE SOFTWARE
PRGM LISTING with line for line
explanation . Educational,useful
application prgm for beginner,
continues where ZX81/TS1000 manual
leaves off. 8k/6k RAM. GROMBACHER
4564 QUEENS WAY, SIERRA VISTA AZ.
LASER WARS 8K/1K..! LOW!PRICES!.1.95
CHEWTER TM(like Pacmn) 8/lup....2.95
Plotting Work Sheet 8/16.6.95
Order,SASE,reSASE gets you GOO¬
DIES Catalog & !!!FREE!!! Program
..Dealer Queries Welcome
EZRA GROUP II POB 5222 SanDiego
EZRA GROUP II California 92105
5 BUSINESS PROGRAMS.$10.95
MACHINE CODE NIT-PICK.$10.95
LIST FOR TOP 3 PROGRAMS...$5.95e
Send SASE For Details
FREE COD Charges
Phone Your Order Today (24 Hour)
Call (414) 276-8787
FOR INFORMATION: (414) 843-3990
P/P FOR JIM UNTILL 10PM. C.S.T.
Mail Order: 5% Off for M.O.
Order From: C.E.D Corporation
P.O. BOX 222 SALEM, WI. 53168
**** EXPERIENCE SINCE 1970 ****
**AS DESCRIBED IN DEC.'82 POPULAR**
SCIENCE!!! THE SINCLAIR COMPUTER
FAMILY SOURCEBOOK gives 100 pg. of
detailed information about products
for YOUR computer! Only $6.95 + $1.25
P+H. Send check or MO to ATLANTIC
COMPUTER Box 936 Norfolk, VA 23501
** SUPER CMOS 2KX8 STATIC RAM SALE **
6116P3-150nS $24/4 $40/8,+$2 P&H
Send check or MO SASE FOR FULL LIST
BHPE 3473 WOODLAWN GURNEE IL 60031
Bolton Road, Harvard, Mass. 01451
MR WILLIAM TOMLINSON 58 68
3635 RIVEREDGE DR.
JACKSONVILLE FL 32211