T-S Horizons

APRIL

No. 18

$ 2.00

ETCH-AH1-SKETCH

A Drawing Program for the 2068
by Richard Watts

2068 1000

Computer Security More on Keyboards
Screen Scroll Partial Pascal
Greeting Card Designer Z X Disk Drives

239 16*27

Rod Humphreys

2006 Highv.ew P' V3H 1N5

For t Moody , b . u . , Postal Patron Local

AI SO AVAIlABi:-- F OR THi^ T/S 2o6 '«

POWERFUL AND INEXPENSIVE BUSINESS SOFTWARE
FOR ZX81, T/S1000 and T/S1500 COMPUTERS

ZX-TEXT ZX-CALC ZX-CALENDAR

A word processor is lo a computer user
what a typewriter is to a typist, except that the
lormer has more advantages than the tatter
ZX-Text can operate in 16-64K RAM providing
from 1300 lo 6500 woros per document it
leatures 6 different options write, read, edit,
print, save and clear text Text is written on a
perline basis with quick speed and with
horizontal back-space and delete capabilities
being available You can also access the
editor directly Irom write mode and vice-versa
Text can be prool-'ead on a per-iine basis
allowing lor enough lime to determine i< any
editing is needed The text editor allows a line
ol text to be deleted, inserted, replaced and
listed lor editing You may also change a word
or expression within a line stop or start text
while n IS scrolling up the screen, begin
reading text Irom the lira) line ol the life, re-
can read-edit two Hies simultaneously The
print option takes text displayed in 30-column
format on the screen and outputs to Bither the
ZX/TS printer (With Memolechs Centronics
Parallel Interlace 80-column and lower/
higher - case output is possible I Files may
be saved on tape cassette with the use ol
one single command, or by the same token they
can be erased Irom memory / storage so that
the lull capacity ol the program can be used
lor other purposes such as composing letters

instructions, ads graphs telephone
directory, lists ol customers, members
Iriends etc Also copies ot Hies are always
less expensive and easier lo run than using a
photocopier Other advantages are savings in
time, paper, ink correcting mistakes and
adding afterthoughts more efficiently than
doing them through either handwriting or

fundamental basic toot lor summarising, reporting,

mathematical or scientific manipulation ol nt
bars ZX-Calc operates in 32-64K RAM and alto us
a maximum of 3360 characters / spreadsheet The
entire matrix consists ol 1 5 columns (tetters A-O)
and 30 rows Inumbers 1 30) with 8 characters/
call Unlike otnei popular ESCs, ZX-Calc uses in
calculations and within cells all 1 4 math functions
on the ZX-81 /TS1000 It otters a unique ’SUM
function that totals one or more rows /columns
simultaneously Parenthesis can be used within
equations There is no tixed limit on how many
equations may Be entered Formulas may be
stored in all 420 cells ol the spreadsheet The
display affords 1 5 rows/colums Loading ot data
into more than one call can occur across/down
one or more row/oolumn simultaneously With

umns m any order, or practice using tixod-variatXe-
alignment display lormats The menu oilers 6
options enter /erase, move, calculate, print, save
and dear the spreadsheet Enter /erase allows
tne entering, delelion or data alignment wtlhm a
cei' through ths use of a mobile cursor With the
move option you may move around the entire
sreadsheot lo access any row column or celt
The calculate option allows youloenier labels

equations thai will act upon the data already wit hm
the spreadsheet You can also enter bar graphs
into a cell in this option Absolute / relative replica-
tion, down/acrossacol umn/row. is alsoallowod

malic calculation o' the entire spreadsheet with
one smgiecommano Pnnl allows youtooutputto
either the ZX/TS printer the enlirespreadsheel by
column-sets and row-pages through use ol tne
COPY command The enltre spreaosheet maybe
saved on cassette tape or you may clear all data
Irom it or erase the program trom RAM entirely
The most salient advantage provided by an ESC
over specticaiiy vertical applications software is
that an ESC prov-dosa reusable framework with
which you can compose any specific financial
model rather than just be limrledtoonly one stati-
cally lived formal tor stonng displaying and
manipulating numerical data

T tme management is an important aspect ol
any serious business and personal agenda
Planning how to spend our time leaves us better
prepared before and while we are spending it

spending it ZX-Calendar operates in 16-64K
RAM affording 25 appointments in 16K, 100 in
32K or 180 in 48K and 84K Each
appointment record holds a maximum ol 220
characters The mein menu includes enter,
search/cneck/sort. change save, clear and
print any and all appointments mada on a
specific date or with any party Output to either
tne ZX/TS printer is permissible This program
will permit you lo remember to do something or
lo be somewhere Important by cataloging your
answers to six questions mat you must account
tor in ofdei not lo waste time when it is scarce

where and what are you going to discuss and
conclude when you gel together with someone
else’ The program lets you permanently
originate record, classity. search, sort,
calculate, modify summarize, obtain a written
report and store your answers to the preceding
questions so that you will not lorgat what you
decide lo do with your lime This program
identities your time according lo when you are
going to spend it and with whom you aia going
to share it Through these toms ol labeling
appointments you are able to verity or modlly
now your time is budgeted without wasting ink.
paper or more lime trying to remember what you
saio to yoursel! or what someone else said to

messages that you now can't find With tms
program you will know where you can Hnd
exactly what you naed to know Bbout where you
want to and nave lo be, O' where you have been,
before you get and alter you got there Thus, ZX-
calondar wilt let you plan your lime so that you will

came before, lor you will always know, by using »,
to never be caught astray By any lime-lrame

$16.95 $16.95 $16.95

$3.00 SHIPPING AND HANDLING /PROGRAM

A.F.R. SOFTWARE - 1605 Pennsylvania Avenue, No. 204 - Miami Beach, Florida 33139

DEALER INQUIRIES WELCOME (305)531-6464 FLORIDIANS ADD SALES TAX

2

April

No 17

TS HORIZONS

ENTER
Try These

Alpha Strlngs-Letters
Computers for Convicts
Leave my Stuff Alone (2068)
by Will lam Pedersen
Making 2068 Back Ups on the
A&J Mlkrodrlve - by EABrown
Etch-Ah-Sketch (2068)
by Richard Watts

Rlght-to-Left Pixel-by-Plxel Screen
Scroll (2068) by Dick Scovllle
Filler Up (1000) by W. Coleman
TextwrlterlOOO Enhancements
by John Ezlke

Surplus Keyboard Improvements
For Extra Shifted Keys (1000)
by Walter Komlosy

ZX 81 News and Resources
by Peter McMulltn

Part-Way Down the Road With Partial
Pascal, by Tex Faucette
Reviews for the NonProgrammer
by A. Gindin

Greeting Card Designer (2068)

Rev. by Bill Ferrebee
Soft-Aid, Reviewed by Tex
The “Horace” Saga (2068)
by Doug'Gangl
TS News
Classified Ads
Computer T erms - Humor

18

22

23

2 A

26

27

29

29

30

«1 Nov*63 Oti ting /Saving Files
(Johnson), Repeat Key end Unint-
erruptible Power Supply Project*,
Numerical Analysis, Load /Save
Problems, Reviews, end eiore 1

•2 Dec'83 Natm/Cursor Jrput
(Johnson), Uaer-Friendliness,
Reset Switch Project, Memory
Reduction, Rule of 78, ZX Cash
Register, Graphics Tutor ial,etc'

« 1 1 Jan'85-40 Pages, lowti
TS 1000, 2048 Word Process
Bar Graph, Experimenting v
Modem, BanK Switdiing-7, INDEX
issuee 1 to 10, Reviews, and

86 June '84 TslOOO As Church Aid,
Interfacing Boohs, Num. Analysis,
Hardware Tips, •WORM"-2, Switch-
ing-3, Good News From EA Brown,

Six Reviews, and more 1

#7 July/Aug'84, Telecommunications
Issue, 2068 Program Tips, How A
Compiler Works, Rotating Globe,

Byte-Back Modem, TC -for Beginner,
Switching-4, WORM-3, S.I.N., etc.

88 Sept '8 4 TS 1000 Music Program,

2048 Plotter, 2068 Character Set
(Young), Address Program, Nine
Reviews, Telecommunications
Column, TS News, and more!

89 Oct/Nov '84 - ANNIVERSARY ISSUE,

TS 206E Spirograph, Dave Higgenbottom
interview, FORTH for T/S Computers,
Spectrum section, Bank Switching -5,
Telecommunications, Reviews, etc.

810 Dec '84 - 40 PAGES, Making Backups
of 2048 Software, Banner Programs, Ql,
TS1000 Program Tips, Christmas program,
RS100vs.TS1000,HTermII/Horuon Awards,

Switching-6, TSUGs, New Column, more!

Cas. on the « 12 Feb/Mar 85 - 2048 Mass Storage, 8 13 April 84 - Compute 2048 W.P. 8 14 May/June '83 Special HARDWARE

X- Eval.-Pt.l, Software iron England, Program Tips listing, TS1000 Simulated READ-DATA Issue, TS1000 Keyboard Add-on, 1X81
ui. Byte Back (or TS1000, 2048 W.P. Eval.-Pt.2, Worm Enhancements, User Defined Rampacks on the 2048, Surge Suppressor

Bank Switching Concluded, HTERH Graphics for 2088, "Try These*, Project, User Group Report, W.P, Eval.

Patches, 2048 Tutorial, Programs. Changing *Fonts"-2048, Reviews. Concluded, QL Report, Cassette Tips.

8ack issues (? $1 50 e,

Subscription t P>c
Name

le Order form

*2 *3 *4

*6 *7 *B

'10 *11 *12

*14 *15 *16

T ctai enclosed $

NOTE: RATE CHANGE effective April 30. 1986.

New rate will be $ 15 for NINE lssue3,

$21 Canada. $28 Foreign. Back issues $2.00 ea

3

I ENTER ~l

Dear Readers,

The excitement continues to mount as the
First Annual Timex/Sinclair Computer Fest
comes closer to reality. Just over a month
from now hundreds, if not over a thousand
Timex and Sinclair computer users will be
meeting in Cincinnati for two days of
learning, sharing, and working together.
From tne point of view of the planning
committee for the event, it has met all or
our expectations at this point: enough
funds have come in to pay for the room and
other expenses incurred. One interesting
aspect of the Computer Fest is that ir
there is any surplus of funds after the Fest
is over (and it appears there may be), the
money will be saved for future T/S
Conventions. This can be to help start an
event in another area, or for a repeat of
the Cincinnati Fest. The board will strive
to see that the" excess funds are used
wisely. Eventually if the money is not used
it will either be distributed to various
user groups or perhaps given to a worthy
charity. At any rate the money will not
just be going to line somebody's pockets.

I have personally heard from people as far
away as Kansas City and Iowa who will be
attending the Fest. Reservations have been
made for people coming in from Atlanta
GA, Annandale VA, Decatur GA. Pittsburg
PA, and Toronto, Ontario.

Some of the companies who will be
represented there are:

Zebra Systems, Aerco, E Arthur Brown,
Knighted Computers, Budget Robotics, RMu
Enterprises, Budget Computer Services,
Russell Electronics, Curry Computer, Ham
Helper, Sync Ware News, JRC Software,
DAMCO Enterprises and of course TS

Horizons. If you have ever wanted to meet
some of these people this may be your only
chance.

User groups who will be represented are:
Cleveland, Columbus, Cincinnati, Dayton,
and Milwaukee.

The Schedule of Events has yet to be
finalized but we already have some very
well-known speakers lined up. Mark
Fendrick, columnist for Computer Shopper
will be speaking on Timex Word
Processing. Jerry Champkis will be
discussing CP/M for Timex computers.
Jack Roberts of TS Connection will be
speaking on basic computer literacy. And
I'm not sure that it is definite yet, there is
a good chance that Tom Woods, author of
the Pro-File programs will be discussing
filing programs. Other planned events
include sessions on telecommunications,
machine language, music programs, disk
and tape drives, the QL, and Forth. Other
events that should be very informative are
three planned round table discussions: one
each for the ZX/TS family and the 2060
family and one to discuss general issues of
concern to TS consumers, such as national
unity and future prospects for the Timex
community.

Another aspect of the Computer Fest is the
planned swap session. Also valuable door
prizes will be given away. While several
people on the commitee for this event have
been very active, I believe two of these
people deserve special credit. One is the
very modest Jack Roberts and the other is
Frank Davis who conceived the idea to
begin with.

If you would like more information about

On a recent trip to
England my mother ran
into one of my favorite
Englishmen. It was Sir
Clive Sinclair sitting and
enjoying his favorite i
show on his pocket telly.

Actually this photo was
taken by my mother at
Madame Tussaud's Wax
Museum on Marylebone Rd
in London. The museum
was started in the 18th
Century and contains
very realistic represent-
ations of such people as
Humprey Bogart, Jack the
Ripper, the Beatles,
Ronald Reagan, and - Boy
George,

this event write to:

Midwest T/S Computer Fest
3832 Watterson St.

Cincinnati, Oh 45227.

Registration is $5 per person and $8 per
family. Hope to see you there.

RENEWAL RATE EXTENSION

Mostly because I haven't gotten around to
sending out new ad copy to magazines like
Computer Trader that print subscription
ads for TS Horizons, we are extending the
deadline for subscribing at our current
rates to April 30. After that date our
subscription rate for new and renewal
subscriptions will be 115 for 9 issues
Instead of the current $ 1 5 for 12 issues.

FREE CLASSIFIED ADVERTISING FOR
SUBSCRIBERS

Beginning with this issue of TS Horizons
we will be running FREE classified ads for
subscribers. These ads are for individuals
(i.e., non-commercial) to get rid of
unwanted equipment, obtain used equip-
ment, find help from other readers, form
user groups or whatever. Please feel free

to send in as many as you want (within
reason) and we'll get them in as soon as
possible.

Well I guess that does it for another issue.
By the way If you think the advertising in
this issue is pretty sparce you're right. If
you don't like It you, the reader, are the
one who can do something about It.

Whenever you buy something from someone
that advertises In TS Horizons tell that
you saw their ad here. That Is a great help
to companies that are trying to decide how
best to spend their advertising funds.
Perhaps I don't emphasize that enough, but
It is Important.

See you in six weeks. Sincerely,

Rick Duncan

P.S. If you are in a user group that pub-
lishes a newsletter, make sure to read
"COMPUTERS FOR CONVICTS" In the letter
section. Thanks.

Cover Date Issue No. Ad Deadline

May /June 1 9 May 2

July 20 June 1 3

August 21 July 25

September/October 22 September 5

November 23 October 17

November 14

'After having gotten my feet wet writing
some software, It became a challenge
Kopresent Introductory or Instructive text
sequences in an interesting way

'I spotted the cover screen for an IBM soft-
ware package which was a real eyecatcher:
gach line of text appeared to scroll outwards
Into place from the centre of the screen. The
Sinclair BASIC string handling features lend
themselves well to this sort or thing.

"A trivial routine like this must (and this one
does) fill 3 requirements: 1) Executes quickly
enough to achieve a specific effect. 2) Easily
coded In BASIC. 3) Uses very few bytes.

“If you use the subroutine In a long Basic
program, put It near the start of the program,
where it will execute more quickly. The
listing should be self-explanatory - the text
Input string A$ must not be longer than 32
characters. An additional benefit Is that the
routine centres all text on the screen.

"Can you see why line 1000 Is necessary? If
not, delete line 1000 then run and see what
happens with odd length strings. Here's the
listing, have some funl

10 LET LINE=2

20 PRINT "> ENTER A TEXT STRING <32 CHRS -
30 INPUT A*

40 IF LEN AS >32 THEN LET A*=A* ( TO 32)

50 GOSUB 1000

60 LET LINE=LINE+-2* (LINE<20)

70 GOTO 50

1000 IF LEN AS/20INT (LEN AS/2) THEN LET AS=A$+"
1010 LET END=LEN A*

1020 LET MID=END/2
1030 FOR N=1 TO MID
1040 PRINT AT LINE, 16-N
1050 NEXT N

1060 RETURN 5

I: AS ( TO N) +AS (END+l-N TO

Dear Misters Duncan.

Thank you for the February /March issue and
our renewed commitment to TS Horizons. I
ave very much enjoyed your magazine and
look forward to continuing to receive it even
if it's somewhat less frequently. So keep it
coming.

Bill Ferrebee's program "Label Maker", that
appeared in your Feoruary/March issue and, I
think, every other TS magazine I receive, is
a handy program. But many printers do not
respond to LPRINT TAB and some readers
may have difficulty getting the program to
work right. The enclosed listing shows my
modification that works with the Aerco
interface and the Olivette PR 2300 Printer.
Maybe it can help some other reader to
utilize this fine program.

Thank you again for a very good magazine in
the past and in the future.

Sincerely, T. L. McCorkle, Monticello, IL

Thank you for the program modification, it
is printed elsewhere in this section R.D.

Dear Rick:

I tried some of those goodies by George
Mockridge that you printed in the middle of
[issue 17] and some of them worked pretty
good. Some of them need a little more
explanation on how to use them. Some of the
things appear to be usable only with the TS
2040 printer. If I entered 0PEN*2 as a
BASIC line the computer would not enter it.

I recalled that I had come across an article
of a similar nature. After a search I found it
in SYNTAX of April 1984, page *3. That
article showed it had to be entered as
0PEN*2,"P". Entering it that way enabled it
to work. The computer would allow no other
punctuation mark for entry other than the
comma. The SYNTAX article showed "P" for

E rinter, "5" for screen, and "K" for the
ottom of the screen. The "copy screen
without using the COPY" command would
work on an 80-column printer but would not
limit Itself to 32 columns. The way I got
around that was to place an LPRINT after the
NEXT X. I also found I could indent the whole
copy by placing LPRINT TAB 8; after the
FOR 1-0 TO 21 statement.

James Brezina, Elmhurst, IL
Thank you, James, for that clarification For

more information on OPEN* and CLOSE* see
Doug Gangi's article in TSH no. 12, page 15.

Dear Sir,

Your "Little Goodies’ for the 2068 was
great. I hope we can get more important
information like this. I don't understand the
vertical line in *13 and *14. It doesn't seem
to make sense as the variable i.

Keep up the fine work,

Cordially, Byron DeFries, Bonduel, Wl

/ can certainly understand why *JJ and *H
didn't make sense to you and several othei
readers. Actually the vertical lines in both
instances should have been the upward-
pointing arrows that are used to indicate
exponents in 2069 BASIC. (This arrow is
identical to the double asterisk **) on the
TS 1000 and some other computers.) In Mr.
Mockridge's original article they were
correct. Also we made additional mistake in
*U, which should read:

(13) LET X = INT ( X * 10T y *5)1 lOTy
Number 14 is correct if the lines are
replaced with arrows. Here is an example
which may help to clarify the use of this
routine, fn conventional algebraic notation,
the above equiation would read:

x r = I NT (x* I0 y *.5) t I0 y
where x r is the rounded number.
Substituting J. 14159 for x and J for y (i.e., J
three decimal places):

x r = INT (3.1 4159* 10 3 + .5) / 10 s
X r = INT (3141. 59* .5) / 1000
x r =INT (3142.09)/ 1000= 3142/1000

|* r = 3.142|

So there you have it. This is a handy routine ;
for many financial proorams, for example, to 1
round off to dollars and cents. NOTE. \
Negative values of y can be used, say -J to ,
round off to the nearest thousand. R.D. \

One more clarification is in order while we i
are on the subject. In "goodie “ *17 ("Gives i
line feed to print statement") the i
punctuation following PRINT is three i
apostrophes. This command causes the 'ft
computer to print one blank line for each i
apostrophe: J blank lines in this case. The ^
same technique works for L PR/ NT - only the p
blank lines are printed on the 2040 printer, i
R.D. |i

it

Dear Rick, P

4

I live in an area that is devoid of a User's t
Group. That is it was till last Christmas- i
New Years holidays and I put an ad in the i
paper. Now we have a User's Group, four i
people Including myself. Our third meeting

6

ts coming up March 23. Last meeting two
members worked on a machine code program
for the 2068. Just listening I am picking up
a little. It is hard to learn when some
simple thing Is not clear and It takes
months to rind an answer. Now I have
several friends to call up and ask.

Sincerely, Donald Lambert, Cedar Rapids IA

Dear Donald, as your experience proves even
a small group of people can create a very
■ successful user group. Some of the most
active TS user groups have only a handful of
members.

TS Horizons is starting a couple of new
services that perhaps can help user groups
like yours. First if you are interested in
contacting other Timex users in your area
we can provide you with the names and
addresses of our subscribers who live
i within the Zip Codes you request.

Secondly, with this issue TS Horizons is
starting a free service to our subscribers.
FREE classified ads. The classified section
will be a great place to attract interest in
your user group. See this issue's ENTER
section for details. R.D.

'COMPUTERS FOR CONVICTS’ DEPARTMFNT

No, this is not some sort of tacky April Fool's joke. A
Californio user group matte a gift of two Timex computers (a
1000 and a 1500) and some software to some inmates in a
Nevada prison. Currently ten inmates are taking turns with
the two computers and a computer literacy course that was
also donated.

The January '86 issue of Timeline? contained a letter from
one of the inmates . To quote a small part of it: "When I came
into prison over a decade ago, there were no such things as
microcomputers and user groups, or nice folks who would
share such a wonderful thing...This is something I have
wanted to learn for so many years, but have been unable to,
because of the rigid fincial restrictions imposed by a prison
setting.. .You can believe that the gracious gift you supplied to
us is being used to the fullest extent."

George Mockridge is the president of the Peninsula User
Group (263 Gateway, No. 107, Pacifica Ca 94044). He and
his user group have been co-ordinating this effort and he
brought it to our attention here at TS Horizons. George has
asked user groups to provide free newsletter subscriptions to
the men. In his words “Imagine how much it would mean to
these computer beginners to receive S to 10 newsletters
from around the country dealing with their new and
sometimes confusing T/S endeavors."

The address to send newsletters to is:

Robert Kelly *124 15,

P.O.Box 208-SDCC, Indian Springs NV 89070.

Their TSH subscription begins with this issue. TSH

10 CLS : INPUT "Program Tit la:”; a*

12 IF LEN a* >32 THEN GO TO 10
14 PRINT TP8 16-CLEN a*x2 3 ; a*

20 INPUT "Line #2 Inro:";bt
22 IF LEN fa* >32 THEN GO TO 20
24 PRINT TPB 1&- CLEN b*x2 3 ; b*

30 INPUT "Line #3 lnfo:";c*

32 IF LEN c# >32 THEN GO TO 30
34 PRINT TPB 16-CLEN c*x23 ; c*

38 PRINT : PRINT PRINT PRINT :
f^RINT

40 INPUT "Bottom Line :";d*

42 IF LEN d*>32 THEN GO TO 40
44 PRINT TPB 16-CLEN d*x23 ; d*

50 PRINT PT 21- S; FLPSH i;"Correct
Cy-'np "

52 IF INKEY*="" THEN GO TO 52
54 IF INKEY*="n" THEN GO TO 10
100 PRINT PT 21-8;"

INPUT "Humber of copies. :";x
110 FOR i=1 TO *

115 FOR i = 1 TO C32-LEN a*3 STEP 2
iPRINT " "; : NEXT j

120 LPRINT a*

121 FOR 3 = 1 TO C32-LEN b« STEP 2
iPRINT " "; : NEXT 3

122 LPRINT b*

123 FOR 3 = 1 TO C32-LEN c *3 STEP 2 -
iPRINT " "; : NEXT 3

124 LPRINT c*

126 LPRINT LPRINT : LPRINT : LPRI
IT : LPRINT

127 FOR 3 = 1 TO C32-LEN d« STEP 2
‘.PRINT " "; : NEXT i

123 LPRINT d*

130 LPRINT : LPRINT
132 NEXT i

140 INPUT "Nora? Cy^nD : " ; x*

142 IF x$="y" THEN GO TO 100

150 INPUT "Rnother title? Cyyn 3 :";x

*

152 IF x*="y" THEN GO TO 10
160 CLS : PRINT PT 10 - 8 ;"PJork Comp
lete3": STOP

9382 REM GOTO Here to save BPSIC P
rogram and machine code PRINTDRIUER
on t ape
9983 REM

9334 SPUE "PRINT" LINE 9990: SPUE "P
RCODE 1 'CODE 64256 ,1111
9385 REM

9936 REM Jump to start of your BPS I
C program
9387 REM

9988 GO TO 1

9989 REM

9938 REM GOTO here to initialize BPS
IC and load machine code PRINT DRIU
ER

9991 REN

9392 CLEPR 64255: LET PRINTORG=64261
: POKE 26704- INT CPR I NT ORG72563 : PO
KE 26703 - PR I NT ORG— C I NT CPRINT0RGx25
633*256: LET MODE=6425& : LET TRPSH=
NODE+1: LET POS=TRRSH+ 1 : LET UIDTH=
POS+1: POKE MODE-1: POKE POS-0: POK
E TRPSH-0: POKE WIDTH- 79. LORD ""CO
DE 64256-1111

3333 BORDER 5: PPPER 6. POKE 23609-2
0

9994 REM Jump to start of your BPS I
C program
3335 REM
9936 GO TO 1

9338 CLS : PRINT PT 8 - 0 ; "Looking tor
program from tape . "Star

t Tape Recorder". LORD

7

2060

LEAVE MY STUFF ALONE I
by William J. Pedersen
The WIDJUP Co.

1 120 Merri field S.E.
Grand Rapids, Ml 49507

EGAD! This is the world's longest REM
statementl There Is no limit to the length
of a statement, except it is impossible to
EDIT any that create more than 768
characters on the screen.

In all of us there is a deep desire to keep our
property safe from observation, damage,
theft, and plagiarism. It is human (and
corporate) nature. As disturbing as it might
be, our fondest hopes are doomed to failure!

Students of cryptography are well aware
that few approaches meet the needs for
secrecy. All codes can be broken in time.
That is quite all right if it takes longer than
you need to keep the secret.

Computer programs are code. Anything you
write Is therefore a form of cryptography.
How about that?

Let's take a case in point. Issue *14 of TS
Horizons had on Scott's cluttered desk the
ubiquitous:

10 ON ERR CONTINUE
Is It breakable? No sweat.

Under the conditions assumed It works very
well, but suppose we change the conditions?
Don't load it as a program. Load it as
machine code instead.

HOW? You might groan. Well, take it from
someone who made a lot of mistakes,
Including erasing parts of tape records —
make a new header. It should specify that
machine code Is expected, where to load it,
and how much. Put it ahead of the old
header. When loading, skip the portion of
tape for the old header and continue. You
will get a tape error message, but the data
has most assuredly been loaded. Now you
can look at it, change It, and even print It
using appropriate utilities.

Why not read the header? It Is "protected",
I will not bore you with the how and why of
this, nor the way around It. You can say
bye-bye to concealment from observation.
Unless you can hide the computer from
itself, nothing can be hidden. It wouldn't be
a computer any more, would it?

For those of you who have damaged your
precious and only tape records, there is
some hope.

If you have been paying attention, you have
learned that you can write tape headers
separately. Ail you need to do is stop the
recorder at the one second gap between
header and data record.

So far so good. . .but what kind of header do
we write? Assuming that if you're still
with me, you have the smarts to figure out
the others — here is an immediate instruc-
tion set which will almost always work for
programs.

R % I' 300 00 :•

POKE 5e?ie

: POKE 267

KE S6712.4S:POKE 26713,50:

- - -714. , 234. .

POKE S671S,13_

Remember that control characters don't
show on the screen and tokens generate
more than one character, CriR$(234)
generates "R", "E", "M", and “ ".

The REM statement has completely replaced
A$(30000). VARS now points to an empty
variable list.

SAVE "Flxlt"

This will write the new header, and a very
long REM if you let it. We'll settle for just
the neader.

This header expects a program from PROG to 1

VARS- 1, and variables from VARS to E LINE

(but there are none). We have extablished
these with our long REM statement and by
poking VARS.

This header gives an error when it fails to
find CHR$( 128) at VARS- 1, EJJNE-I, a valid
CHECKSUM byte, or finds an erased sectfon.
Any program smaller than the REM state-
ment will load. This Includes programs with
damage due to accidental POKE'S which
destroy the line structure. These don't run,
but can be mixed using methods similar to
the one used here, immediate commands
usually work, even when programs don't.

Programs with erasure gaps and intact
headers already load up to the point of the
gap. You can save this much by finding the
CHRK13) at the end of the last intact line,
and poking a pair of CHR$(l2B)'a after it.
Then poke VARS to point to the first
CHR$(l28)and enter CLEAR. (Examine it as
machine code. You have already seen how.)

Rescuing the part of the program following
an erasure gap can sometimes be done by
splicing. A machine code program borrowing
routines from the EXROM can read anything.
If you had it, you wouldn't need any other
technique.

Now you have diagnostic, and surgical tools
for fixing damage.

About plagiarism --. Nobody in their right
mind cares to copy GARBAGE It must have
SOME meaning.

If you really want and need security, there
is one reliable way. Encrypt your code using
a "public key” scheme. This is a method
based on a longer Integer which is the
product of two prime numbers. The "public

P Rt-'T CF- I

l

t

s

e

1“

L

8

u

s

rr

to

m

ci

w

ol

U

fr

Ir

m

te

cc

cc

up

lo

th

ac

lo

yc

fr

co

5 «

key' Is the long product. The "private key" Is
either of the primes. The largest binary
integer usable with the 2068 Is 32 bits. A
CRA computer might break a 32 bit code In a
few minutes, but why would anyone try?

Theft (or loss if you can't prove It) hurts
just as much when the stolen item Is
useless to the thief as If it were jewels.
Always . . . ALWAYS . . . keep backup copies,
stored away from the cleaning lady, the
jelly fingers, the compulsive button pushers.

What has been presented here is not in-
tended to let you penetrate deep secrets for
criminal purposes. It is for self-help when
things get sticky.

What bugs me is that computer manufac-
turers have advertised and sold security

systems that my dog could open. Then they
try to prosecute the poor guys who pene-
trate them. It Is hard to see who Is the
bigger thief. TSH

PD BOX 1 13, MAYVILLE, NY 14757

TSHG8D-I5GD-ZX8I

SOFTWARE

Making 2068 Back-Ups
on the A & J Mikrodrive

By E. Arthur Brown

Using Thomas Woods' 2068 Profile has proven
to be the most convenient data base for our
supplier and media contacts. (I've found it
even better than Microsoft's FILE for the
Macintosh... a $200 fiasco software package.)
Using it with our 2068 Mikrodrive (same as A
& J Mikrodrive), nas further enhanced it's
utility with extra speed and reliability in
saving and loading. I did, initially, have some
misgivings about the Mikrodrive versions
because there were no easy instructrions for
making back-ups. I've since figured a
convenient method myself and thought it
would be a good idea to share my method with
others.

LOAD the Mikrodrive version of 2068 Profile
from cassette and configure it as per
instructions. (If you plan Lo use the internal
mikrodrive printer port, you'll need a patch
tape from us which we'll supply for $5 to
cover coots.) This will give you one blank
copy of Mikrodrive profile. Now, to make back-
ups, you'll need to configure a re-usable
loader With no wafer in the Mikrodrive, LOAD
the Mikrodrive version from cassette once
again. You should get an error report after the
loader has loaded. LIST the Loader program to
your screen. Now, DELETE lines 1000-2000
from the Loader program. Next, FORMAT a
couple of 5-10 foot wafers using the SAVE
"@l, + " command. NOw, insert one of these
wafers and SAVE >, pfile" Save the same
thing on the other formatted wafer You have

just made a Loader which you'll use to prepare
other wafers to save Profile and its data
Now, Format as many 35ft or longer wafers as
you want to have for Profile back-ups. Then,
LOAD "@pfi)e" LINE I : VERIFY "@pfile". This
saves and verifies an auto-run version of the
loader to file I of each wafer. You now have a
set of wafers that are ready to back-up
Profile and it's data

To use these back-ups, you start a file with
your original empty Mikrodrive version of
Profile. When it's time to SAVE your work,
you remove the original wafer and insert one
of your prepared wafers. Since the SAVE goes
to files 2 and 3, your Profile and data will be
readily saved and verified. To make a back-
up copy, just SAVE again onto another
prepared wafer.

NOTE: Besides speed, the 2068 Mikrodrive

should be consistantly reliable. If you have
frequent tape errors, there is something
wrong. After a year of no problems, mine
started having frequent tape errors. I used a
swab and the cleaning solvent from our
computer maintenance kit to clean the head
and rollers and the drive returned to its
previous reliability.

I hope this back-up procedure is helpful to
your readers. If any are confused or have
questions, they're welcome to call or write
for help

Sincerely, Eben Brown, E. Arthur Brown Co.
3404 Pawnee Dr, Alexandria, MN 56308
(612)762-8847.

ETCH-AH-SKETCH

For the TS-2068
by: Richard E. Watts

It's hard to come by a good drawing program
with the capabilities represented In this
one.

This program was originally written for my
uncle's Atari 400 but, arter many
modifications, I converted It for the 206s
and thought I would share It with other
users. I worked on this program two years
off and on. so I hope you like it.

Type It In Just as Is and when you type in
the last line, type in RUN 9988. Once this Is
done compare the output to the output at the
end of this article. If they are not the same,
find which line or lines the errorts) are In
and fix them. (For more information on the
"Llnecheck" program, see TS Horizons no. 12,
page 10.)

Once this is done DELETE lines 9988 through
9999 and then CLEAR and SAVE "etcher’ LINE
0. At this point it would be wise to VERIFY
the program as well.

HOW the program WORKS: Put a Joystick in
the left port of your computer and RUN the
program. After a STOP THE TAPE intro
followed by a fanfare with credits on a
yellow screen (for color TV) For
black-and-white TV's, change state- ment 4
to "BORDER 7: PAPER 7" ;it cuts down on
glare. You will see a flashing dot in the
center’ of the screen with a Xj coordinate
at the bottom.

The numbers at the bottom of the screen
represents the location of the cursor
(flashing dot) on the screen. The number
after the "TO:" represents how long the
cursor Is set by the W key.

Move the joystick in the direction you wish
to go and If you wish to leave a dot or line
behind, press the button on your joystick.
To erase a line, retrace It without pressing
the button.

The INKEYS letters are decribed below:

A->Draws an ellipse on the screen.

This may take a while depending on
how small the ellipse is.

B->This copies the picture to the
printer, if one is attached.

C->This clears the screen but don't
worry if you accidently hit it
because it asks if you're sure you
want to do It.

D->Thls draws a vertlcle or horizontal
or an angled line and places the
cursor at the end of it.

F->Thls fills in a certain area but make
sure that the cursor Is at the lower
left or upper left of the area to be
filled.

l->Th1s changes the Ink color.

M->Thts pauses the cursor so it can't be
moved unless another key Is hit.

0->Thls draws a circle using the circle
command built Into the computer.

P->This enables you to print something
to the screen. Anything, anywhere.
Flashing or not.

Q->Thts quits the program. *(See note
below).

R->Thls loads a picture from a tape.

S->Thls saves a picture to a tape.

W->Thls changes the width of the cursor.

Z->This "Centers’ the cursor l.e. X»128,
Y-88.

4->Th1s sets the increments of the arrow
keys. This Is set at 8 at the
beginning of the program.

ARROW KEYS->Go In respective directions
incremented by the four key.

* NOTE: After hitting the Q key the
program Is still in the memory of the
computer and a poke 23635,86 Is
needed to restore the program
followed by an INK 0. You will see
only a "2>" at the top of the screen.
You need to edit the line.

66 26

63 4-55

70 372

72 188

-303

318

-151

136

102

56

293

262

114.

254-

273

154

94

343

-320

-323

-326

-325

340

-264

164

286

80

-522

158

262

180

102

104

106

103

110

112

114

116

113

119

120
122
124
126
128
130
132

186

137

-17

222

200

241

198

251

231
119
126
-64
293
76
-10

232
241
175
101
1804
96
41

7

202

116

241

740

-232

134 399

136 363

138 -318

140 -57

142 3

144 2

146 551

143 36

150 -736

152 159

154 241

156 214

153 2

160 85

163 67

164 217

166 245

167 204

168 121

169 -51

170 173

130 241

190 -172

200 -536

9933 210

9989 236

9990 188

9991 -71

9992 176

9993 322

9994 29

9995 146

9996 111

9997 113

9998 178

9999 169

mo wsGS

1 REM

CREATED BY R.E.

2 ON ERR 60 TO 4

URTTS

4 POKE 23561,20: POKE 23609,1
8- POKE 23562,1: POKE 23658,8: F
OR 0=0 TO 2: CLS : BORDER 6: POP
ER 6: NEXT O

6 PRINT RT 11,9; FLRSH 1; "STO
P THE TAPE : " : FOR X=0 TO 100: BE
EP .005,32: NEXT X: PRUSE 60: CL
S

8 GO SUB 118

10 LET H=0: LET 1=8: LET X=128
: LET Y =88 : LET U=0

10

134. INPUT "SPUE OS ? ";N*: PRIN

T ttl; AT O,0;"SRUIN6 PS ";N*. SPU
E NS SCREEN* : RETURN
136 INPUT "LORD UHPT PICTURE ?

" ; N * : PRINT »l;OT 0 , 0 ; "LORDING P
ICTURE ";N*: LORD N$ SCREEN* : R
ETURN

138 OUER 0: INPUT "X DIRLRTION

FACTOR ";R: INPUT "Y DIRLRTION

FRCTOR " ; B

14.0 FOR T=0 TO 6.3 STEP .01
142 LET 0=R*C0S (T)

144 LET R=B*SIN (TJ
146 LET 0=1.1040
148 PLOT G+X,R*Y

150 PRINT ttl; RT 0,0; "X="; PBS ((
INT (O) +X) ) ; TRB 10;RT 1,0;"Y=";A
BS ((INT (R) +Y) ) ; TPB 10;" -
152 NEXT T
154 RETURN

156 INPUT "UHAT COLUMN (0-31) ?

“;c

158 PRINT RT L,C;AS: FLASH 0
160 GO TO 103

163 INPUT "FILL HOU MANY SPACES

TO THE (+) RIGHT ?";LR

164 INPUT "FILL HOU MANY SPACES

(+)UP/ (-)DOUN UD

166 IF LR<0 THEN LET INC=-1

167 LET INC=1

168 FOR A=X TO X+ (LR*INC) STEP
INC

169 PLOT A.Y: DRAU 0,UD

170 NEXT A
180 RETURN

190 ON ERR RESET : STOP
200 ON ERR RESET : FOR X=0 TO 2
. CLS : BORDER 7; PAPER 7: NEXT
X: PAUSE 30: OUT 2SS,1: PAUSE 60
: OUT 255,0: PRINT ttl; AT 0,0; "©
1983 Sinclair Research Ltd";flT 2
,0;”© 1982 Timex Computer Corp”:
POKE 23635,0: INK 7: PAUSE 0: C

LEAR

9988 REH

9989 REH by John Bell

9990 LET IOC =26710

9991 LET total=0; LET linum=PEEK
10C4256+PEEK (loc+1)

9992 LET length=PEEK (lOC+2)+PEE
K (lOC+3)*256

Smart Text TS-2068

and the new

Smart Text OS— G4
( For the Zebra OS-64 Cartridge )

With Universal Intfc/Printer Patch
For all Corif igurat ions

Three Integrated softwares that does
■ost all administrative functions
Word proc - Data files agt - Nailing
List - Fora Letters - Nailing Labels
Repeat printing - fluto Letter Heads.

Supports all Printers, plus TS-2343.

29.95 ♦ 43.33 sailing to: Bill Jones
Gulf Nicro, 1317 Stratford five,

Panama City, FL 32434

hfl? STEp a | tlOC+4> T ° tloc+len ’ t

9994 LET tota l =tOta l +PEEK (a) -PE
EK (a + 1)

9995 NEXT a

9996 L PR INT linum;TAB 6; total

9997 LET lo c =loc ♦ leng th+4

9998 IF linum=9999 THEN STOP

9999 GO TO 9991

Remember The Babies

Each cross-mark represents 50,000 people killec
The war casualties represent all American combi
and combat-related deaths.

Revolutionary War (25,324) . . 1

Civil War (498,332) . . . t+tt+t+t+t

World War I (116,516). . t + 1

World War II (545,108) .. ... ++++++++++1

Korean War (54,246) +

Vietnam War (56,555) +

WAR OF ANOTHER KIND - WAR

++++++++++

killed by legalized abortion,

The U.S Supreme Court legallzedtttttttttt
abortion on 22 January 1973, for all i r i i • i , , . ,
nine months of pregnancy. ; ■ '

++++++++++++++++++++++++

+t+++++t++++t+++++++++++

tttttt+ttttttttttttttttt’

tttttttttttttttttttttttt

++++++++++++++++++++++++

tttttttttttttttttttttttt

++++++++++++++++++++++++

++++++++++++++++++++++++

tttttttttttttttttttttttt

tttttt+ttttttttttttttttt

++++++++++++++++++++++++

tttttttttttttttttttttttt

ttttt

Statistics from 1982 World Book.

Updated by Ohio Right to Life 1986

Distributed by:

Ohio Right to Life Education Foundation
718 South High Street
Columbus, Ohio 43206
(614) 445-8369

12

A RIGHT-TO-LEFT

PIXEL-BY-PIXEL

SCREEN SCROLL by Dick Scovllle

As you can see, the following machine code
program can be located anywhere you wish.
The ideas involved won’t be new to readers
of my earlier articles in the Triangle
Sinclair Users' Group newsletter. (I only
hope I haven't given you exactly the same
thing already!)

It is very easy to double a number that is
given in binary, Just as It Is very easy to
multiply a number by 10 if it Is given in
decimal— in each case, you Just ado a 0 on
the right. That is, twice the number

x 7 x 6 x 5 *"4 x 3 X 2 X 1 x 0
is the number

x 7 *6 x 5 X 4 X 3 X 2 X 1 x 0°*
where the variables x 7 through x 0 represent
ones or zeroes.

Since our object is to shirt bits to the left,
this is a quick way to do it. If our number
were In the A register, the instruction

ADD A, A

would "double" it by adding A to itseir. or
course if the result is too Dig, that is. If X7
is I the new contents of the A register will
be

x 6 x 5 x 4 x 3 x 2 x I x 0 °-

and the carry flag would be set (reset if X 7
were 0).

ADC A, A

This instruction is similar to ADD A, A— it
will add A to itself but also add one more to
the answer if the carry flag was set
previously. It will then adjust the carry
flag depending on overflow. Here are some
examples showing what happens to A and the
carry flag after an ADC A, A instruction:

old old new new

A carry A carry

00000001 0

00000010

0

01001001 1

1001001 1

0

01001001 0

10010010

0

101 10000 1

01 100001

1

xabcdefg y

abcdefgy

X

Here is the program:

DDOO LD HL.FF57

' 2IFF57

1

DD03 LD B,20

0620

2

DD05 AND A

A7

3

DD06 LD A, (HL)

7E

4

DD07 ADC A, A

8F

5

DD08 LD (HL) , A

77

6

DD09 DEC HL

2B

7

DDOA DJNZ FA

IOFA

8

DDOC LD A, 40

3E40

9

DDOE ANDH

A4

10

DDOF LD B, 20
DDI1 JRNZ, F3
DDI3 RET

0620 1 1

20F3 12

C9 13

Line I loads HL with the last byte of the
display file (which runs from 4000 to 57FF).
We will poerate on each pixel row of the
screen by looping through Its 20 (32
decimal) bytes, we use register B as an
index since that is the register that DJNZ
uses. Line 3 has the important purpose of
making the carry zero. (All the logic
operators— AND, OR and XOR— do this.)

Lines 4 to 8 form the actual loop. When we
enter the loop, HL will point to the
right-most byte of a pixel row, and the
carry will be 0. Keeping in mind how ADC
A,A shifts bits to the left, you can see how
we have entered a 0 on the right and moved
all the other bits to the left. When we
leave the loop, that is, when B has finally
been decremented to zero, HL will point to
the right-most byte of another pixel row,
and tne carry flag will contain the
(unwanted) value of the pixel that has been
shoved off the left margin. Of course at this
point we might be done, having gone through
all the pixel rows. Lines 9 and 10 decide
that for us— we will be done only if HL holds
a number less than 4000,

4 0 0 0

0100 0000 0000 0000

..H L

that is, only if the bit in H indicated has
become 0, that is, only if (H AND 40) is 00.

Line 10 has the further happy effect of
resetting the carry flag, which Line 1 1 does
not ruin. Thus in Line 12, if the result of
the AND was not zero, we jump back to Line
4, the beginning of the loop, with the carry
flag reset.

If you would like to have a
Scroll-to-the-Right routine, not very much
has to be done— you will want to start at
4000, and increment HL. The lest for the
end of the screen is a bit messier, but recall
that RRA (whose code is IF) is the perfect
analog of ADC A, A. Only the direction of the
shift changes. I'll end the article with a
simple illustration of the routine in use
(DD00-56576dec) :

10> LET y- 1 00

20 LET y=y+2*INT (2*RND)-I
30 PLOT 255,y
40 LET abc=USR 56576
50 GO TO 20

If you think about how RANDOMIZE and USER
work, you will understand why replacing
LINE 40 with

40 RANDOMIZE USR 56576

is not such a good idea. TSH

13

STEP 3 : Enter and run this tistinq to demon-
strate FILLER UP

For the TS 1000 / ZX 61

by Walt Coleman

Have you ever had a use for a partial screen
clear or a rapid screen fill with a specific
character? Then FILLER UP is for you It's a
short (24 byte) machine code routine that
can be stored in an opening REM statement
or relocated to any of your favorite M/C
storage spots (no absolute addresses are
used).

To use this routine from a basic program
two lines are required. First a PRINT AT
row, column; This will set the point on the
screen we wish to clear from (HM with
spaces). Then a RAND USR 16514 or LET
X=USR 16514 call will execute FILLER UP.

Using the PRINT AT statement allows us to
use two Sinclair System Variables in our
program. The variable DF.CC at 16398
contains the address that the next byte of
the display file will be written to. Likewise
variable S.POSN at 16442 contains the line
number for the PRINT position. This line
number, however, does not correspond to our
usual convention (top line being 0, bottom
line being 24) but instead numbers the top
line as 24 to the bottom line at I

For M/C lovers:

1 PcM E; RNDFUURNDCHfi$ ■- T
RUN ' PRINT TAN
10 FOR TO 21

20 PRINT 1,1,-flT 1 ,30; I

SO NEXT I
10 FOR 1=1 TO 30
50 NEXT I
60 PRINT OT 3 o,
re RAND USR 1*514

Line I contains M/C program from steps
1 and 2

Lines 10 to 30 fill the screen.

Lines 40 to 50 provide a delay
Line 60 sets the exact screen position
from which we wish to fill
Line 70 calls FILLER UP

To change the fill character POKE 1 6524, —
with a number between 0 and 63 or
betweenl28 and 191 consulting your manual
for the desired character code To chanqe
the fill point change the PRINT AT
statement, but be sure to end it with the ,

Isn't it amazing what such a "little toy" can
do The only 7/5 1000 limitation is our
ingenuity and imagination If you have any
comments or problems, I'm always glad to
hear from you.

Walt Coleman
728 Seville Avenue

Wilmington, DE 19809 TSH

MNEMONICS COMMENTS

LD HL,( 1 6398)
DEC HL
LD A,( 1 6442)
SUB A, 2
LD D, 128

LD B.A
INC HL
LD A,(HL)

CP 118
JR Z+3

LD(HL),D
JR-9
DJNZ-I I
RET

Load HL w/ PRINT AT pos'n

Load A w/ number of I ines
to be filled

Load D w/ character to be

used for fill

Set up loop counter

Is next character an end of
line marker

If yes skip it and decre-
ment counter

If no load w/ our character
And go to next display char
Have all lines been done
If so return to BASIC

So much for explanations. Lets get to the
keyboard and see how it works.

STEP 1 : Enter and run the following llscmg

1 REN 12345673901234.567390123
10_LET A $ = ' 2A0E402B3A3 A40P502 1

'237EFE762303-

20 LET fl*=AS.

T 7 10^509 “

30 FOR 1=1 TO 24
40 POKE ( 16513 + 1? , 16

"...received my moneys worth with just one
issue..."

—J. Trenbick

.always stop to read CTM. even though
most other , magazines I receive (and write tor )
only get cursory examination..."

—Fred Blechman. K6UGT

515 00 lor 1 year
" \ $25.00

S35.00(land) ■ $55.00(air)

Mexico. Canada
Foreign

Permanent (U.S. Subscription) $100.00

Sample Copy S3.50

CHET LAMBERT, W4W0R

1704 Sam Orive • Birmingham. AL 35235
(205)854 0271

STEP 2 : Delete lines 10 to 60 being careful
not to delete line ), which now contains
FILLER UP,

14

TEXTWRITER 1000 ENHANCEMENTS
By John Ezike

One of the best word processors around for the
ZX/TS computers is TEXTWRITER 1000 by
Robert Fingerle (see review In Sync Jan/FeD
84). However, there are a few enhancements
that I found which make it even easier to use.

In type mode, screen flicker can be a bit of a
problem. If you have a video inverter board (see
Popular Electronics 5/63) it is not so bad. The
following lines will eliminate screen flicker,
enable auto repeat when any key is held down,
without affecting the normal operation of the
program. Deleting characters will be slightly
slower. LOAD and after the menu comes up
enter STOP (5HIFT-A) to break out of the
program. Enter LIST 135 then type and enter
160 to delete the line. Add the following lines.

140 SLOW

173 IF AS-” THEN GOTO 170

The following lines simplify the task of
printing multiple copies of your file. If you
enter option 4 or 5 from the main menu a
prompt will require that you enter the number
of copies you want. The familiar prompts
requesting the start and final lines will then be
displayed. Enter LIST 80 and using the down
cursor (SHIFT-6) and edit key (SHIFT- 1 ),
renumber line 97 so it is now line 98. Also
renumber line 95 so it is now line 97. Add the
following lines:

86 IF LN-4 OR LN-5 THEN GOTO 95
95 PRINT 9 AT I6,0;"ENTER NUMBER OF COPIES' ILAISRlSSf

mm mm r

CONTROLLER BOARD FOR TS 2068
SPECTRUM EMUL A TOR COMP A T/BLE

- High speed loads 32k bytes in 7 5 seconds
-commands are LOAD SAVE DIRECTORY DELETE

FORMAT COPY MOVE and BAD0LOCKS

- Uses iBM PC compatible 5 1/4 “ double sided
diik drives (SHUGART 3A455 or compatible)

- Disk capacity 160 k bytes

- Dos is on a bank switched 2K eprom

- Only 1 USR call is required

- Assembled and tested ,all cables and connectors
supplied

- Single drive version is available now out a second
drive can be easily added (tms mod will be available
before FEB 36)

- 60 day money back guarantee

- Made in CANADA , many already in use
Price

$95.00(US) + 56 00 shipping

From LARKEN ELECTRONICS
RR*2 NAVAN ONTARIO
CANADA K4B-IH9

yo iinkui ini*

5535 FOR 0=1 TO NC
5595 NEXTO

In lines 5535 and 5595 the "0" used
as a variable is the letter and not zero.
Enter GOTO 35 and select option 3 from
the menu to save. DO NOT USE RUN !!
Happy computing!

JOHN EZIKE

1619 GRANT ST. APT. 6

BERKELEY, CA. 94703 TSH

\ % <
‘ \

w

15

Surplus Keyboard Improvements
for Extra Shifted Keys I by waiter

Komlosy

The Tl 99-4A keyboards, still widely For other keyboards with many extra keys,

available, are an Ideal unit for the you can use as many 40)6 I.C.5 as you need

ZX8l/Timex 1000 computers. Recent and to wire up other shifted keys you want

not so recent articles have shown how the Each 4016 will handle three shifted keys,

shifted keys on the KB-0 line can be since one CMOS switch of each I.C. used

connected using two diodes. This method must control the shift line from D6 to KB-0.

can give you four useful and often used
shifted keys: EDIT, DELETE, quotation

marksO, and FUNCTION. It can also give you What to do with your TI99-4A key tops.

STOP and '* , which are not of so much use.

Revising the above keyboard for the ZX8 1 /
However there are other shifted keys, that Timex 1000 has been well documented in the

are very often used, which can be hooked up past; however, not much has been written

using the diagram shown in figure I. As you about what to do about the key tops. This

will see one CMOS 4016 I.C. can provide you article Is about my solution to the above

with any 3 shifted keys you want by proper problem,

connections. For the T I 99 keyboard only one

4016 is used and I have connected my own Years ago, when I received my first ZX0I kit

keyboard as per the diagram to give me from Sinclair, it arrived with a bad stick-on

graphics and the move left and move right keyboard, which was promptly replaced and I

arrows on keys 5 and 8: these three ended up with two. I kept the bad unit in a

additional keys make program entry much sealed poastic bag and years later used it to

easier and faster. cover my first full size keyboard from Tl

surplus.

Since the Tl keyboard has a 15 pin connector

attached and only 13 pins are used for the That tells you the where; now here is the

keyboard on the computer, the two how:

additional pins can be wired to carry the

needed +5V and ground to power the 4016

from the computer.

i used double-sided foam tape to WlR£ AND "t" to thftwo onused Ddnictj

mount the 4016 at the top corner OF 15 DoNoT CONNfctoR ARRAY- ToP o F KEY&oARb.
of the Tl P.C. board, behind the 0
key. Before mounting, bend all
14 leads straight out from the
body of the 4016 so it looks like
a fiatpack I.C. This will make
the mounted assembly less than
1/4“ high, and should not inter-
fere with your own method of
mounting your keyboard. Connec-
tions and the six diodes and four
I OK resistors are now wired as
per the diagram. Finally wire up
the two unused pins on your
keyboard (first isolating them by
cutting any traces to the pin
donuts at the 15 donut connector
array at the top of the Tl board).

Run two wires of appropriate
length to the computer +5V and
ground traces (you will have to
trace them out first) and the
revision will be complete.

Should you find that your
keyboard works erratically on
some shifted keys (mostly on the
A-S-D-F-G line), then the fix is
to connect a 27K 1/4W resistor
from the +5V pin 14 to the KB-0
pin II of the 40 1 6. It might be a
good idea to include this resistor
as part of the revision, since it
will do no harm and may avoid
shift problems.

16

Assuming you have a bad keybaord due to the
mylar connection strips and your computer
Is apart for repair.

First you must assemble what you will need
for the job. Get a piece of slippery backing
paper from self stick labels, etc. large
enough to cover the membrane keyboard. You
also need a metal straight edge ruler, a new
blade in your exacto knife, a clean, sharp
scissors, a sharp miniature flush cut pliers,
small thin screwdriver, small pliers with
serrated jaws and some cleaning solvert
that leaves no residue.

Take the screwdriver and pry up the two
lower edges of the membrane keyboard.
With the serrated pliers grasp those edges
and slowly pull the membrane from the case.
Do not allow the pliers to touch any areas
with keys and do not touch the stlcfcy back
of the keyboard. When it is free of the case
place it carefully, sticky side down, onto
the slippery side of tne backing paper.
Press it firmly to the backing paper all
around so that dust can not get to the sticky
surface. Now you can cut off the mylar
connecting strips at the top.

Get a piece of cardboard (not corrugated)
and lay It on a flat, stable surface; then
place the membrane keyboard with its
backing, printed keys face up and using the
metal edge ruler, held very firmly in place,
cut the bottom edge off the membrane about
1/64" below the white function legends at
the bottom of the lowest line of keys. In a
straight, clean cut.

Now you must cut off the top edge of the
membrane. Here you have no printing to use
as a guide. Mark off 3/32’ above the white
portions of the top row of keys and use
those marks as a guide to cut tne top edge
off. You should end up with 3/32' of black
membrane above the top row of keys and the
same black area should be left on the bottom
row of keys where no legends exist below
the white part of the keys.

Next you must make three cuts, very , very,
carefully; cut between each row of 10 keys,
making sure not to cut Into the small white
printing above and below each key. You
should end up with four strips of 10 keys,
three of which will have small printing
above and below in white and the top strip,
which should have a black border along the
top and bottom of the strip.

Now, with sharp scissors, separate the keys
in each strip by cutting them apart exactly
in the center of the black space between
each key. Do this for all four strips and you
will end up with 40 key tips with backing
paper on each key. Set them up in rows as
they were on the Timex and take your Tl
keyboard and clean off all the Tl key tops
with the solvent cleaner. When they are
clean and dry, take out each membrane key
top, peel off the backing and press It in
place onto the Tl keys. Line them up
carefully before pressing them firmly into
the curved contour of each key. Start with

the lowest line of keys at shift, work
across, then start the second line at the
left. Caution: do not touch any of the Tl keys
with your fingers after cleaning them.

Depending on how you configured your Tl
keyboard, certain right side keys will be
moved around. Space and enter will have
been moved to the large space bar and the
one large space bar will make those changes
to fit your format.

Once you have all your membrane tops
aligned and firmly pressed ot the Tl keys
you must remove each key from the keyboard
by prying them off gently with a
screwdriver; begin with tne top row and
work your way down. No need to remove the
lowest row or four keys.

With your sharp flush cutting pliers, flush
cutting edge against the keys, trim off any
excess membrane along both sides of each
key and round off all four key corners. You
should end up with an easily readable
keytop, with all the Timex legends Intact,
that will not abrade or deteriorate with
constant use.

After trimming push the keys back on the
key switches and admire your new keyboard.

For my own extra keys 1 used self stick
white labels with 1/8 Datak red lettering
coated with Datakoat protective coating.
Much use tends to wear off the coating and I
now cover those keys with transparent
yellow mylar tape which has a tough and
durable surface and makes the shifted keys
prominent.

My two Tl keyboards have functioned
beautifully and have stood the test of time
well. None of the membrane tops have fallen
off or lost any legibility after years of
constant use. TSH

* * Aerco FD-68 Software * *
Disk File Manager'- Lists detailed directory and
occupied tracks. Checks disk. Copies single or all
flies on 'disk, even it you have only ONE disk drive.
Optional printer output. S.25 DO disk or tape. $16.00
Omni Disk- Conversion prograa for Omnicalc (v. 640001.
Customize al I colors and keyboard buz2. Supports both
tape and disk save/ioad. 5. 25 OD disk or tape. $9.00

MSDIsk: Conversion program for MScripl
paper/ink and various default values,
tape and disk save/load. 5.25 OD disk

tape. $9.00

TSIOOO and 2068 Program
Vocabui Ider: Vocabulary learning program. Requir
16K* RAM. Tape only. VB-1000, $12,00 VB-206B,

Uord Teister- Design your ovn word-search puzzle.

16K* RAM. Tape only. VT-1000, $10.00 VT-2068, $13.00

Prices include shipping. Specify tape or disk.

Please send SASE for Information or check/eoney order
to: Chia-Chi Chao, 73 Sullivan Dr., Moraga, Ca. 94556

17

ZX 8 1 NEWS
AND RESOURCES

BY PKTER McMULLIN

This column is, once again, devoted to a
lengthy product review. I'm planning a
catch-up on resource/supplier listings next
issue, but a couple of items deserve
immediate mention:

HARDCORE HARDWARE HOBBYIST HANDBOOK

ZX8I hardware expert Bruce Taylor, of
Budget Robotics & Computing, Box 18616,
Tuscon, AZ 85731, has announced the
release of his book, BUILD A MICRO-
COMPUTER CONTROLLED ROBOT AND OTHER
COMPUTER CONTROL PROJECTS. (QUITE A
MOUTHFUL).

TAB Books had owned the rights for over a
year, then decided not to publish. After this
runaround, Mr. Taylor's company bought back
the rights and is now publishing the book.
This Dook presents the design of an
award-winning robot in thoroughly
documented project form, and promises to
be a valuable reference on interfacing just
about anything. Printed circuit boards will
be available from Budget Robotics for every
project in the book. Chapter topics include
Adjustable Power Supply, 8255 PIO Board,
Digitalker Voice Synthy, Stepper Motor
Drivers, Optical Encoders, Polaroid
Ultrasonic Ranging kit, and others. Over 200
8.5"x! I" pages, 80+ illustrations, 60+
tables, loosebound. Price: US $13 ppd.

For a sample of previously published work,
see "Robotics on a Budget, p. 18, SYNC Vol.
3 No. 4; Also "Home Control on a Budget," p.
31, SYNC Vol. 4 No. I ; both by Bruce C.
Taylor.

Budget Robotics holds rights to an improved
version of the Computer Continuum buffered
expansion board, as well as the Zodex RX8),
an inexpensive general purpose parallel I/O
board. Write for details - Bruce replies
promptly.

HOLY MODEM, BATMAN

Westridge 2050 Modems, tested, with phone
cables but no case or power supply are
available form Dave Clifford, 13910
Halldale Av., Gardena CA 90249, 213-516-
6648. The price? $25.00 for one, three or
more for $22.50 each, ten or more for
$20.00 each. Including delivery. At time of
writing Dave indicated that ne had about
1500 left. However, he also has an undis-
closed number of untested boards which are
missing a couple of minor parts (an LED and
resistor). Plans are to sell these as-is at an
even cheaper price, including a complete
schematic and parts ID for the hacker

Needless to say I ordered my modem the
same day I heard about Mr. Clifford, as well

as a copy of MlNI-XMOD 1.7, at $20.00 from
WEYMIL corp., Box 5904, Bellingham WA
98227-5904. 3

MINI-XMOD is terminal software which is
said to be the best available for the
ZX8I/TSI000 (or the 2068). Dave Clifford
indicated that he would be working on a
version of MtNI-XMOD for the 2068, first a
32-column version, then a 64-column
version. It would be an interesting challenge
to work up a 64 column version for the JLO
Video TS 1000!

HARDWARE REVIEW

Subject: Aerco FD-ZX Floppy Disk System
Source: Aerco, 7606 Robalo Rd,

Austin TX 78757

FD-ZX Floppy Disk Controller Board and DOS :
$179.00

Auto Boot ROM Board: $ 59.00

Auto Boot ROM Board with Centronics l/F:

$99.00

Complete packages are also available.

NOTE: See "Bug Alert", last issue for a
discussion of the Boot ROM/ Centronics
board.

BASIC TECHNICAL SPECIFICATIONS

Drive type: Shugart compatible 3", S' or

8" drives, I or 2 side.SD or DD,

35 or 40 tracks per side.

* of drives: up to 4.

DS/DD Capacity: 400K bytes.

Disk Format: IBM readable, 10 sectors per track,

5 12 bytes per sector.

*Flles per disk: up to 20 (as 4-track pages)
up to 6 (as 1 2-track pages)

Memory use: 2K DOS in EPROM , and FDC all 2- 1 4K

FDC I/O is memory- mapped.

F ormat DSDD: approx. 35 seconds.

CopyDSDD-DSDD: approx. 1 minute, 5 seconds.

Avg. LOAD/SAYE: 3 sec. (20K page)

5 sec. (60K page)

Error Reports: WRITE PROTECTED; INSUFF. RAM;

DISK ERROR.

Physical size: Circuit board is approx. 4.5 x 6", gold

finger extensions.

Special ICs: 1797 FDC (Siemens): 9216 Data

separator.

What do you see when you open the box
containing your newly arrived AERCO FD-ZX?
One uncased controller board, a computer
bus ribbon cable, one floppy disk, and a 16
page manual. What else do you need? Disk
drive(s), drive cables, cases and power
supply. Aerco's manual gives reasonably
easy- to-follow instructions for hooking up
your system, and has several useful
illustrations. The power supply must provide
+ I2V at 2-3 amps and +5 at 3 amps. The
drive cable required is a standard IBM/
Shugart 34 conductor pc-edge type. If you
follow Aerco's instructions to the letter, I
you will likely void any warrentee on your
new drives. The FDC board gets its +5V and
+ I2V supplies via pins 2 and 34 on the disk
drive edge connector. Pin 34 is normally
unused, but pin 2 is connected on some
drives. Aerco recommends you cut any
traces going to pins 2 or 34 on the drive and

18

jumper these over to the power supply pins.
This way you connect the power supply only
to one drive, and the FDC board and other
drives get powered through the ribbon cable.
The result is tidy but I hate to hack up a new
drivel The alternative would be to cut wires
2 and 34 adjacent to the contoller card, and
run separate power lea^s to everything. I did
It Aerco's way.

Having hooked up drives and power supply,
the FD-ZX plugs into the supplied ribbon
cable; then the RAM pack, etc. onto the
ribbon cable's male edge extender, and we're
ready to see what's on Aerco's ‘master" disk.

On application of power, the K cursor
appears. Following Aerco's instructions, the
master disk is placed in drive A. The
command RAND USR 13303 initialises the
DOS, and loads "page I" from the disk. The
following menu appears on the screen in
about 3 seconds:

RAND USR (12720 ♦ PAGE) to SAVE a spec-
ified page or RAND USR (12290 ♦ PAGE) to
LOAD from a specified page. After loading
the program from tape, the DOS must be
Initialised by the command RAND USR
12865. This command initialises the FDC
and loads certain DOS parameters into bytes
16507/16508. Thus the lines:

9900 SAVE "PROGRAm"

99I0CLS
9920 RUN

...would be replaced by the lines:

9900 RAND USR 12865
9905 RAND USR 12722
9910 CLS
9920 RUN

In this example, a GOTO 9900 would save the
program to page 2 on the disk, and autorun.
When the program is reloaded, It will come
up in the same mode (SLOW/FAST) as when
it as saved. To save the program on, say, page
6 instead of page 2, line 9905 would read
"RAND USR 12726.-

WELCOME TO SADOS+ I6K 8/83

C COPY DISK (REQUIRES 2 DRIVES)

D DISK UTILITIES
E ENTER NAMES IN DIRECTORY
F FORMAT DISK IN DRIVE A
H HEX MONITOR
L LOAD MEMORY FROM DISK
0 QUIT

S SAVE MEMORY ON DISK

Nothing too surprising here. Some further
explortion of the manual reveals some
interesting facts. All DOS functions are
accessed via RAND USR commands. The “DOS"
program supplied on page I of the master
disk serves two purposes: I) It is a
"user-friendly interface" (oh cliche, cliche!)
to the DOS USR routines, and 2) It contains
the Disk Directory.

Two different DOS control programs are
supplied: a “I6K" version and a "64K"
version. (All capacities specified here are
for a 40 track, DSDD drive.)

The 16K DOS permits 20 programs or data
files to be saved on a disk. The disk is
divided into 20 4-track pages. Any program
saved occupies one page, regardless of
whether it is a IK program or a full I6K
program. Each "I6K" disk page will actually
hold up to 20K full of data. Thus it is
extremely unlikely that you will ever use
the full potential storage capacity of the
disk. The 64K DOS assigns 6 pages per disk,
each page having a capacity of 60K bytes. It
is otherwise rdentical to the I6K DOS
program.

Having saved a program, it must be entered
in the directory. So, entering RAND USR
1 3303 brings up the SADOS menu. Pressing E
gets a prompt asking which page you want to
name, followed by tne entry of tne program
name. Having done this, you must re-save
the updated directory to page I. This Is
offered as a Y/N option when you finish
making directory entries, or it can be done
by pressing the S at the main menu. Now if
you hit L at the menu, the directory
appears, listing pages I through 20 and their
contents. Any program may be loaded by

The Aerco D05 does not record a filename
with each program, nor does it

automatically maintain a directory.

Programs are loaded and saved by page
number. It is the user's responsibility to
keep the directory on page I updated.

_ . ,, , * The price Is just *10.95 + *2.05 shipping CS13.00 *

Converting a breakable program to a disk * total), send yoU r check or n on ey order t D; budget *

version is quite easy. Aerco uses sequential * robotics & computing, box ie6i6 , tucsoh. kz 85731 *

USR calls for SAVE and LOAD commands: ^*,***,„**„,„,*„„,******«»**»***»»*»********»*i

19

TS 1 0OP Pro grams from HCS SERVICES. P.O.Box 1754. Portsmouth. OH 45662
Price (add $ 1 .'-^-P&H per order). Money back guarantee.

Quantities limited. Please specify second and third choices as alternates.

Games

Mixed Game Bag
Supermaze-"pacman"

Hangman- just like the childrens' game
TS Destroyer / Space Raider*

Space Commando*-adventure game
Strategy Football
Fortress of Zorlac
Meteorites*-! ike the arcade game

Finance

Stock Market Technical Analyzer

Stock Option Analyzer

Real Estate Investment Analyzer

Stock Market Calculator*

Statistics

Money Analyzer I

Money Analyzer II

Critical Path Analysis

Manufacturing Control

Inventory Control

Education

College Cost Analyzer
Teachers Grade Book
Punctuation Master

Quiz Kit**- create your own computerized multiple choice quizzes
Alpha Vowel Tutor*-for younger school-aged children

Miscellaneous NOTE: Most programs require 1 6K RAM

Home Asset Manager Stamp Col lector

Coupon Manager Biorhythms* All programs by Timex-Sinclair except.

Guitar for Beginners Carpooler *bySoftsync, inc.**by Time Works, Inc.

Timex / Sinclair Owners..

TAKE A LOOK!

TiMeH

»eSijhS

Hr

COMPUTED CREATIVITY

ONLY
$15 year
SIX ISSUES

’ Readers nationwide
(and Canada too!)

‘ 36 Illustrated Pages

• Published "On Time"

’ Interesting Articles / Programs

• Current Information

• Exclusive "T/S Shopper "
Guide

SUBSCRIBE TODAY!

i SAVE S3 00 Oil Newstand Price Send Coupon (or a copy) i

I wild Check or Money Order lor $15 (U.S. Funds Only) lo |

address posted below We will slarl your subscription right
I away upon receipt of your order

I'M! (X SIGNS MAGAiINf COMPANY
wrilNurioo •Couon.O-.gonWOi?

Address:

Oly I Stale Zip .

20

s

U

M

The Sinclair/Timex

User’s Magazine

Hardware Projects • Hardware Reviews
Software Reviews • Product Comparisons
Published Monthly • Back Issues Available
Free Personal Ads (or Subscribers

SUM Magazine is aimed at Sinclair and Timex users who
want to learn what is available for their computers, how to
do things no one else is doing, and what is just over the
horizon. Examples of recent articles include: Reviewing
the Portuguese Disk Drive System; Rotronics Wafadrive
Review; Hi-Res Graphics (or TS-1000; Build Your Own
Printer Interface; & a series on Beginner’s Programming.

SUM Magazine invites articles, reviews, and projects for
possible publication. We pay lor articles publlshedl
Hardware and software producers are invited to submit
their products for review.

Annual Subscription/12 Issues (U.S.) $15

Sample Copy— $1.00

SUM Magazine

3224 NW 30 Avenue — Gainesville, Florida 32605
904/378-9000 or 462-1086

entering its page number, or you may copy
the directory to your printer.

D, for DISK UTILITIES, provides selection of
PROGRAM or DATA mode, of Disk Drive A, B,
C, or D; Single or Double Density, and also a
Clear Directory command. In Data mode all
variables are saved and loaded, without the
Basic program.When re-loading data, no test
is made for variables space. Variables must
already have been dimensioned or declared
so there is enough room between VARS and
E-LINE for the disk file to load into. With an
understanding of these limitations, the Data
mode can be very useful. I've successfully
programmed a version of WSII.5 which loads
and saves data files ONLY; up to 20 16,000
byte text files, each saved with a filename
string. The program will sequentially search
a disk for any named file, and print an
automatically maintained directory. I'm sure
that versions of ZX PRO-FILE(or other file
handling programs) could be modified to
sequentially search a whole disk, if
necessary to find a entry.

CPUs and BUS LOADING: I had lust gotten a
few programs saved to disk, and was
marveling at the speed of program access,
when I realized l had problems- random load
errors galore. Bytes were simply dropping
out of programs. Suspecting bus
speed/loading problems, I singled out 2
possible culprits: my CPU, and the ribbon
cable provided by Aerco. The NEC D760C
CPU in my computer is a notoriously
substandard Z80 chip, so I replaced it with a
new Zilog Z80B. The Z80B is designed for
operation at up to 6MHz., thus has lower
intrinsic capacitance, and "stiffer" bus
drivers than the slower versions. At the
same time, I nixed the ribbon cable, and
plugged everything into my new JLO 6-slot
motherboard. A ribbon cable can have 5-10
times the capacitive crosstalk as a
motherbvoard the same length, so I figured
this would help. Not so simple, though. The
male edge connector on the FD-ZX is a
mirror-image of that needed by the JLO
motherboardl Thus, I had to fashion a
"side-swapper" adapter to plug everything
together. Having sone all this, the problems
completely disappeared, and the disk system
has been 100% reliable ever since. I don't
know whether the CPU or the motherboard
was the significant factor, but the
combination licked the problem.

IN CONCLUSION, the AERCO FD-ZX system has
made a “disk convert" out of this ZX81
hobbyist. The hardware is of good quality
and is well assembled. The DOS control
program is certainly utilitarian, although
some resourceful programming can make it
do many impressive things. The existing
DOS control software simply doesn't take
advantage of the FD-ZX hardware's potential.
Aerco's documentation is quite thorough, and
provides a few clues to accessing more
sophisticated DOS commands thru machine
code. The incredible speed of reliable
access to a large number of programs or
files makes it easy to overlook the short-

comings of the DOS.’

FROM ACROSS THE POND

Thanks to colleague Larry Chavarie of
Ottawa, (who subscribes to even more
publications than I do), I will be listing a
number of British concerns which continue
to support the ZX8I aftermarket. MAPLIN
ELECTRONIC SUPPLIES LTD., P.O. Box 3, Ray-
leigh, Essex, England SS6 8LR, tel. (0702)
554155, is the U.K. dealer for Heathkit. but
that's only part of the picture. Maplin offers
no fewer than 9 hardware project kits for
the ZX8I, including a full-sized keyboard,
sound and speech generators, a TV sound/
inverse video kit, modem interface, extendi-
RAM, and hi -res graphics module. Prices are
very reasonable. Most of these are male-only
cards which are also compatible witn
motherboards available in the U.5. from John
Oliger and Budget Robotics and Computing.
Maplin still offers over 15 books about the
ZX8I (with something for everyone), and
publish their own electronics project
magazine, 12 issues are currently available,
and almost every one has a ZXBI projectl
(How about a ZX8I navigation/autopilot
system for your yacht?l)

Larry tells me Maplin gives prompt, reliable
service. 450 page catalog is LI. 35. If you
wish to exercise the plastic, Maplin accepts
Visa and Mastercard (called BarclayCard and
Access in the U.K.). Check this company out.

TSH

curry

computer

P.O. Box 5607

Glendale, Arizona 85312-5607, U.5.A.

Telephone: 1-602-978-2902
Telex (Via WUI): 6501267701

"We have had a QL for about one week now
and are just beginning to appreciate the power
and versatility it contains. Keep in mind thatfor
the price . . . There is nothing that compares
with it."

The QL Report

published by Curry Computer
February 1, 1985

We know the QL . . . we've been appreciating it
longer.

Write for our free catalog.

21

Part-WayDown the Road With
Partial Pascal
by Tex Faucette

Partial Pascal from Semper Software (585
Glenn Ellyn Place, Glenn Ellyn, Illinois 60137)
was the subject of an earlier review. This Is a
follow-up which Includes a book review plus
other "adventures' with Partial Pascal.

First, the book:

“FROM BASIC TO PASCAL" by Ronald W.
Anderson. Copyright 1982 by Tab Books, Inc.,
Blue Ridge Summit, PA 17214. ISBN 0-&306-
1 466-4 Cpbk).

Ronald W. Anderson Is “my kind" of writer, and
FROM BASIC TO PASCAL- Is "my kind" of book!
Read on.

In the authors own words the book, "..has been

PROGRAM PRIMESIU l INPUT, OUTPUT) ;
URR
MAX,

PRIMPTR,

J ,N,

INTER Uh-
COUNT ,

HALFMAX,

5EARCHLIM INTEGER,

PRIME -ARRAY ( .1. ,0000.)

OF BOOLEAN,

FUNCTION SORT (NUMBER : INTEGER >
INTEGER ,

CONST
IN IT =4. ;

MAR

RESULT

GUESS; INTEGER,

BEGIN

RESULT *XNIT
GUESS .

UHILE ABS (.GUESS-RESULT) >1 DO
BEGIN

GUESS. = (RE5ULT+GUE5S' DIU 2
RESULT =NUMSER DIU GUESS.

END;

SORT- =GUE55,

END ; •

BEGIN
URITELN ,

WRITE ( "MAXIMUM NUMBER?”; ;

READ (MAX');

URITELN ( "PRIMES TO" , MAX : 6) ,
URITELN;

HALFMA.X: =MAX DIU 2,

5EARCMLIM =30RT (MAX) +1,
INTERUAL : =3 ;

PRIMPTR: =2;

“'OR N : =1 TO HALFMAX DO
PRIME f ,N . ) , =TRU£;

WHILE INTERUAL < SEARCHLIM DO
BEGIN

J = INTERUAL + i IMTERUAL+1! DIU 2

WHILE U < sHALFMAX DO

BEGIN

PRIME ( , J . ) =FALSE;

J; =j+interual;

END:

PRIMPTR: =PRIMPTR+l;

WHILE PRIME ( .PRIMPTR. j =FALSE DO
PRIMPTR. =PRIMPTR+l;

INTEP.UAL : =PRIMPTR*2-1 ;

END:

COUNT: =2,

WRITE l" 1 2"),

FOR N =2 TO HALFHRX DO
BEGIN

IF PRIME UN.) THEM
BEGIN

WRITE (N *2—1 7) ,

COUNT aCOUNT+l;

IF COUNT MOD 10 =0 THEN

URITELN

END .

END

URITELN,

URITELN,

URITELN (COUNT S . "PRIMES 1 ■

prepared primarily for those with a knowledge
of Basic and little or no formal training in
Computer Science. " That fits. Later on he
states, "[you] may be annoyed by the compiler
being so picky *. On the subject of compilers he
also notes that, "..by the time you have gotten
your Pascal Program to compile without any
detected errors. It Is pretty close to running
(though not necessarily correctly)."

AMEN, Brother, tell It like It Is!

Heeding those and other warnings, I proceded to
aPP Y ,Mr. Andersons text and programs to
Partial Pascal... or was it vice-versa?
Whatever, the results of my excursions were
Interesting, Informative, frustrating educa-
tional, and Just plain fun. Successful? Well,
maybe.

Since the book had made some mention of the
variety of compilers available, and variety of
results they sometimes yielded. It as not really
a surprise to me when Partial Pascal detected
errors where none were visible. Or that
supposedly error-free object code occasionally
behaved In a strange manner. The biq surprise,

MAXIMUM NUMBER7PRIMES TO 50

16PRIME3

MAXIMUM NUMSER?PRIME3 TO 1000

229 233 239 241

251 25? 2B3 269 271

277

231 233 293 307

31.1 313 317 331 337

’349 353 359 36?

373 3T9 333 339 39-

401

409 419 421 431

433 439 443 449 457

461

463 467 479 437

491 499 503 509 521

523

541 547- 55? 563

569 571 577 '537 593

”601 607 613 617

619 631 841 643 64?

' 653

659 661 673 677

633 691 701 709 719'

727

'33

751

761 769 773

797

309 Sll 321 , 323

62? 329 339 353 357

359

863 377 331 333

337 907 911 919 929

937

941 947 953 967

971 977 933 991 997

169PRIME5

22

B

^e

?r

le

sn

"y

"9

to

to

1?

re

and a pleasant one, was when one of the sample
programs actually worked. J think.

Bear In mind that I am a bottom-of-the-ladder
novice In Pascal Bear also In mind that I have
avoided higher mathematics, like a plague for
more years than I care to remember. Now,
Imagine my elation when I obtained both a
compilation and an execution of a prime seive
program! Sure, I got It out of the back of the
book, so what? I still had to translate It to
Partial Pascal! Listing and Prlnt-out are
submitted with this review.

The ‘source code" compiled rapidly, once I got

It right. Sorry. I was too excited to time it
exactly. Execution of the 'object code' was
timed fairly accurately. Primes to 1000 was
done (on screen) In 30 seconds. Same operation
to Timex 2040 printer took 4 seconds. Going for
primes to 2000, 1 had It on screen (304 primes)
In 55 seconds and I learned that I need a better
understanding of proper formatting when l
ported the same to the printer. OH well, back to
the drawing board.

All Jokes aside, PARTIAL PASCAL remains
Interesting, and FROM BASIC TO PASCAL is the
best tutorial I have found to date. Thanks guys,
I have enjoyed the experience. T5H

REVIEWS

of for the Non-Programmer

iy (TS 1 000)

?d

at

ly by Art Glndln

Expensive computers have a built-in
procedure to check the system when
starting, whereas we have only a "K*. To
remedy this situation 1 am supplying the
following program. Don't panic, I did not
write a program. The 16 K test Is from the
directions that come with the Sinclair RAM
and the Joke used to fill out the program is
suitably referenced.

Notes on the program:

Line 130 and 140: These call up the

ZXLR8 program to load the next part of
the tape.

Some alterations would have to be made for
a 64K RAM but I have never been able to get
one to work on my system.

Something of more use Is a zapper. This Is a
device to remove electrical spikes from
your telephone line. 1 didn't think they were
necessary either until we were struck by
lightning and It took me a year to get my
system back together, zappers are avaiiame
from Spaceport Products, Box 927, Sharpes,
FL 32959 and were about $ 1 1 each a year or
so ago. Unless I were renting my telephone I
would have one there too.

Line l: SLOW Is needed at the beginning
of all programs loaded with ZXLR8.

Line 25: CLS removes the ZXLR8 mess-
age.

Line 1 1 0:1 r the 16K Isn't all there, 1
suspect the program will crash anyway.

1 SLOW

10 REM OOOOFFICEOOO

20 REM <><><> I NTRQOOO

21 REM A. KOHLENBERG-SYNTRX 5/32
25 CLS

30 COSUB 160

90 REM OOOMEMORY TEST O'.: : >

100 REM 00016K TESTOOO
161 POKE 19090,33

102 POKE 19001,11

103 POKE 19082,0

104 POKE 19003,5?

105 POKE 19004,63
166 POKE 19005,7?

19? POKE 19006,201

,108 LET L=< U3R Cl 9000 >-16373 VI 024
169 PRINT Li "K"

(110 IF L< 15. 9 THEM STOP
■120 PRUSE 150
1125 CLS

.130 PRINT RT 4, li "ENTER ""OFFICE"" P

140 PRINT USR 14336
150 GOTO 0

160 PRINT RT 10,5;"*** HI I RM 2X31 'ft"

165 PRUSE ISO

170 PRINT RT 12,3, "I RM R PERSONAL COMPUTER"
130 PAUSE 150

190 PRINT RT 14, 3; " I CRN DO MANY THINGS AND"
195 PRINT RT 15,7; "THE BEST IS TTY"

200 PAUSE 150
210 CLS

220 PRINT ,,"I NEVE MAKE MISTAKES"

230 PAUSE 100

240 PRINT RT 2, 7; "WHOOPS"

245 PAUSE 100

250 FOR Y=25 TO 7 STEF: -l

260 PRINT RT 2,Y,"r"

270 PRINT RT 2, Vi" "

230 NEXT Y

290 PRINT RT 1,6; "r"

303 FOR R=13- TO 1 STEP -1
310 PRINT RT R,6; "R"

328 PRINT RT fi,6, " "

338 NEXT R

340 PRINT RT 1,6; "R"

345 PAUSE 100

356 PRINT RT 10,3; "WELL, ALMOST NEVER"

360 PAUSE 150
378 CLS
33Q RETURN

r THE PROMPT" 23

2068 REVIEW: GREETING CARD DESIGNER
Reviewed By Bill Ferrebee
MOUNTAINEER SOFTWARE

PROGRAM: GREETING CARD DESIGNER
COMPUTER: TS2068 (80-col. printer required)
PRICE: $19.95

AVAILABLE FROM: E. ARTHUR BROWN COMPANY
3404 Pawnee Drive
Alexandria. MN 56308

One of the most popular software programs to
emerge In the past few years is PRINT SHOP.
PRINT SHOP is a graphics program that lets you
design banners, letterheads, and greeting cards
with your computer and print them out with a
dot-matrix printer. Almost everyone has
received at least one greeting card or
Invitation produced with this program.

But, PRINT SHOP is only available for the
so-called "real" computers... IBM, Apple, and
Commodore. Does this mean that we T5 2068
owners have to do without again?

No! Thanks to Zebra Systems (the same great
folks that brought us Tech-Draw... ZPRINT80...
and many other fine products), we now have...
GREETING CARD DESIGNER!

GREETING CARD DE5INGER works with any of the
more popular TS2068 parallel printer
interfaces (AERCO, Tasman, A &J), and any of
the following dot-matrix printers...

Epson RX/FX
Gemini I0X/SG10
Memotech DMX80
Panasonic 1090/1091
Prowriter 8510

GREETING CARD DESINGER comes with a 16-
page manual, and a cassette tape with 2
programs on one side, and a library of 23
graphics on the other.

The two programs are the greeting card design
program itself, and a graphic design program
This program enables you to design and save
your own graphics for later use.

I found out how well the graphic design
program works by necessity. The graphic
library side of my review copy would not load (I
tried 3 tape players!), so I had to design my own
graphics.

Putting the program (and my lack of artistic
ability) to this test proves how well this
program is put together. I was printing my
first card in minutes.

GREETING CARD DESIGNER gives you a variety of
options to choose from. There is a menu of 8
different borders (you can use any 2 in one
card), 2 type fonts and 2 type sizes. Also,
using the graphic design program , you have an
unlimited choice of designs. You are only
limited by your imagination!

I believe in this program so much, I will be
providinga new graphic for you to use in each
issue of T-S HORfZONS. The first one is in this
issue!

24

SOFTWARE REVIEW
by Tex Faucette
BAND-AID TRUST
c/o Stoy Hayward
8 Baker St.

London, Wi.

Reviews
b V ^

Available from CURRY COMPUTER, 5344 West
Banff Lane, Glendale, Arizona 85306 ($9.95)

I would assume that all readers are aware of
the famine in Ethiopia, and of various
cooperative efforts to provide relief to the
victims.

The 50FTAID tape is one such cooperative
effort, and provides a rather painless method
for one to make a small contribution by way
of its purchase.

The SOFTAID tape contains an audio segment
at the beginning of each side (unplug the ■'ear”
connector if you want to hear it), followed by
five different game progarms. Documetation
with the SOFTAID tape includes an index count
for each game and playing instructions. There
is also a listing of numerous persons and
companies involved in its production.

SPECTRUM ROM IS REQUIRED!

All of the 10 games included on the SOFTAID
tape are excellent examples of British
Spectrum programming. The graphics are
imaginative, tne action thrilling! All games
may be executed by keyboard input only but
several contain menu selections for utilizing
various joysticks and interfaces. Listen to
me now, Vern, these are some of the
top-rated games from across the Pond! Here's
the lineup:

SPELLBOUND (Beyond)

5T ARB IKE (The Edge)

KOKOTONI WILF (Elite)

THE PYRAMID (Fantasy)

HORACE GOES SKI ING (Melbourne
House/Psion)

GILLIGAN'5 GOLD (Ocean)

ANT ATTACK (Quicksilva)

3D TANK DUEL (Real-Time)

JACK AND THE BEANSTALK (Thor)
SORCERY (Virgin)

Being somewhat less than a "Dedicated
Gamester" ( a polite term for "arcade freak"),
l hesitate to apply comparative ratings to

games. I consider all of these ten to be
excellent, but must confess to slight
addiction to KOKOTONI WILF and JACK AND
THE BEANSTALK.

At only a buck per game, this is an amazing
bargain. It could become a "Collectors Item
All proceeds go to aid Ethiopian Relief.

BUY IT!

#############################$

# the: *

* KRUNCHER $

* IS *

$ ! ! HERE ! ! *

# $

# HAVE YOU EVER RUN INTO $

# THAT BRICK WALL CALLED *

# "OUT OF MEMORY”? *

# $

# HAVE WE GOT THE ANSWER FOR *

# YOU! A PROGRAM THAT WILL *

# “BYTE” INTO YOUR BASIC %

# PROGRAM, CHEW ON IT FOR A $

# FEW SECONDS, AND SPIT IT $

# BACK OUT WITH FROM 10 TO *

# 407. OF THE MEMORY EMPTY! *

# . $

# SOUND GOOD' SURE IT DOES!! $

# WE HAVE TESTED IT, AND IN *

# ONE CASE, WE WENT FROM 239 *

# BYTES FREE, TO 12400 FREE! $

# $

# 2068/SPECTRUM - #9.95+1 *

# 1000 VERSION COMING SOON! *
$ $

# JUST CALL OR WRITE: *

$ $

# RMG $

# ENTERPRISES $

# 1419 1/2 7TH STREET $

# OREGON CITY, OR 97045 $

# <503) 655-7484 $

# S.A.S.E. *

# FOR FREE CATALOG *

# SEND THIS AD OR COPY WITH $

# ORDER-GET COUPON GOOD FOR $

S #5 OFF NEXT ORDER FOR #25 #

# OR MORE! *

**#**$$#$*****$#############**

TS 2068 REVIEW
The "HORACE" Saga

there are 3 programs in Che Horace saga:
HORACE AND THE SPIDERS, HORACE GOES SKIING,
and HUNGRY HORACE. Having all three, I think
they are quite entertaining.

First let me tell you about Horace. He looks
like a little ghost and he is easy to get
hooked on because he is so cute. Even the
cassette covers will make you chuckle.

HORACE AND THE SPIDERS is a game in which you
have to guide Horace through 3 scenarios.
You can either use the joystick or the
keyboard. You must keep Horace away from
those spiders because he has only 5 lives!

The first scenario is just one where you have
to jump over the spiders at the right time.
The second one is a little harder!

In the second scenario, you must get Horace
across a pit. But you must jump onto the
rope that each spider holds onto. When you
are on the rope, the spider will then start
pulling it up so you must be quick.

The third scenario is like Space Panic (or
Apple Panic). You must make holes in the web
so the spiders get stuck in them. Then you
have to jump up and down on one until he
falls through and dies.

HORACE GOES SKIING is another good game. In
this one, Horace must cross a road with heavy
traffic in order to rent his skis. Then he
must cross back again. Some of those drivers
are maniacs!!!

Once across, Horace can start skiing. He
must ski between five flags (it's a slalom
course) to get points. There are trees in
the course which you must avoid. If you hit
a tree three times with the same pair of
skis, you break them and you must go back
across the street for another pair.

Horace has $40 in the game. It costs him $10
to rent skis each time and $10 for the
ambulance fee (if he is hit by a car).

And finally, HUNGRY HORACE is another PAC-MAN
type game. It is much harder though. In
each maze there is an exit where Horace can
exit into another maze (3 in all). It is a
fun game.

In all three Horace games you can use a
joystick. My favorite is probably HORACE
GOES SKIING.

Doug Gangi

Editor's Note: All three programs are
available from "Games To Learn By", P.0. Box
78, 28 Clairhill Road, Collinsville, CT 06022
(203) 673-7089. TSH

The "Horace Trilogy" : Hungry Horace, Horace and the
Spiders, and Horace Goes Skiing.

27

28

T-S NEWS

ITEM: "Zebra Systems, Inc, announced that
the price on their Zebra-Talker has been
reduced and the software Is compatable
with their disk drive. My notes say $35.00, 1
hope I got It right. They are now ready to
market t/PM for the disk drive system. They
will have WORDSTAR and Microsoft BASIC
available. They currently have M-SCRIPT and
UTILITY PGM 5 available on disk for the
built-in T-DOS system. Both Letterwrlter/
Bufferwrlter and M-Scrlpt are available on
tape for use with OS-64. For anyone who has
their Greeting Card designer program they
have announced that they are going to be
releasing data tapes with many cut-and-
paste designs. If you submit (on tape) a
design that they can use you will receive the
tape that yours Is on. (From Mile High
Chapter TSUG newsletter, 914 S. Victor
Way, Aurora CO 800 1 2)

Classified Ads

INDIANA TS/ZX USERS; Let’s start a users
group. Write to Frank Davis, 513 E. Main St.,
Peru, IN 46970. Open to beginners as well as
pros. ZX80, ZX8I, TS 1000, TS 1500, Spectrum,
and TS 2068 users.

Aerco FD-68 w/b - 150. Aerco C/P IF w/s - 50.
Timex 2068 (no RGB) - 50. Timex 1000-20.
TS 2050 w/MTII - 50. All ♦ S/H. (M/0 only). D.
Gustafson, Old Corry '1501, Pens., FL 32507.

FOR SALE; Portuguese 2068. Never used. Make
offer. H.C.S. POBox 1 754, Portsmouth, OH 45662.

ITEM; A new book of over 200 hundred
programs for Timex and Sinclair
computers. That's rightl The author Is Joe
C. Smith, jr., a current writer for
Computer Trader Magazine, and soon to be
a writer for TS Horizons. The cost of the
book is just $7.95 (plus $1.50 P&H) and
contains all kinds of programs from a Word
Processor, to an NFL Prediction program.
Other programs include "Sundial",
"Couponing", 'Supergraph," and much more.
Order from BIT/S Software, 3202 W.
Fillmore, Phoenix AZ 85009. Plus free
mechanical drafting pencil while supplies
last.

ITEM; Howard Sams Co., 4300 W. 62nd St.,
Indianapolis IN 46268, has just published a
new reference book for TS 1000/ ZX8I
maintenance and repair. It is part of their
series of "Computerfacts” manuals that
cover a wide range of microcomputers. The
cost is $19.95. Call 1 -800-428-SAMS for
more information.

ITEM: The Timex 2068 Technical Manual is
now available in its second edition. The
book is said to contain many improvements
over the original poorly produced version
including spiral binding, professionslly
printed text, and a full color cover. Over
300 Pages. $25 postpaid from Time
Designs, 29722 Hult Rd, Colton, OR 97017.
Tell'em TS Horizons sent you.

ATTENTION: 2068 owners. If you don't have a
ZX/81 or TS 1000. Then you probably didn't
read Pete McMullln’s news about the
Westrldge 2050 Modems (without power
supply or cases, but with phone cables) for
only $25 each from Dave Cllford, 13910
Halldale Av., Gardena CA 90249.

And If you didn't read that, you probably
didn't read about Weymll Corps MINl-XMOD
modem software for the 2068 and the ZX81.
Only $20. Maybe now's the time to get into
telecommunications. See Peter's article,
"ZX8I News and Resources."

C5C5C5C5C5C5C5C5C5C5C5C5C5C5C5C5C5C5C5C5C5C 5C5C5C5C5C5C5C 50405

ITEM: The Sinclair C-5 electric vehicle
is now available for sale in the United
States. Newpower, Inc., 64 Foundry St.,
Keene, NH 03431 Is the exclusive U.S.
Importer. The price is $595 assembled
or $395 in kit form (plus $95 shipping).
The Sinclair C-5 is battery-powered,
inexpensive to operate, and cruises at up
to 15 mph. You can order by calling

1-800-543-8000, operator 865. You can
return it in ten days if not satisfied (you
still pay shipping charge.)

Length

5'9”

Width

2'5"

Height

2'7”

Weight (without battery)

66 lbs.

Luggage capacity

leu ft

Max. speed

15 mph

Tires pneumotic

Range Up to 15 miles

29

ITEM: "Thomas Woods has developed a 32K
Bank-Switched programmable Memory cart-
ridge for the TS 2068. It Is battery-
protected to retain Its programs when the
computer Is switched off. A wrlte-protect
switch lets you use memory like an EPROM.
Therefore you can run your own plug In
programs, or extend your memory by 32 K.
with detailed Instructions for bank
switching and data transfers. SI 10.00.
Inquire to T. B. Woods, P.O. Box 64, Jefferson
NH 03583. 603-586-V734." (From RAMTOP,
Cleveland TS Newsleter, .)

COMPUTER TERMS

The following computer terms appeared in ZX
Computing (Feb/Mar '85, page 40). The author
Is Jim Lock of Surry, Great Britain. Larrv
Chavarie sent a copy of the list to TS
Horizons and we picked out our favorites.

Array - what you shout when your program
works first time.

Artificial Intelligence - what you think your
com- puter has and it thinks you have.

BASIC - a standard language most suitable for
newcomers to computing as it uses simple
words and Instructions such as ABS, OPEN *,
L PR I NT, USR, DEF FN and CHR$.

Computer tape - used to attach a Sinclair
RAMpack to a ZX8I.

Cursor key - what you often do when you
accidentally move your laser base In the
wrong direction.

DIM - how you feel when you see programs
written by you seven year old daughter.

FOR...NEXT - short extract from conjuror’s
patter, "For my Next trick".

IF.. THEN - conditional statement, as in “IF you
try to copy this program THEN your computer
will explode."

LEN and VAL - the married couple who live
around the corner.

Listing - what your computer Is doing to one
side, having lost one of It’s rubber feet.

Microdrive - car-racing arcade game for your
computer.

NOT - used to tie two STRINGS together.

RAMpack - device you plug in to the back of
your computer so that It can unplug itself
whilst you are typing in the last line or a very
long program.

REM - put at the beginning of a line to REMind
ou to remember it and the computer ignore

Screwdriver - instrument for invalidating
guarantees.

Sound chip - good golf shot

STRING - used to attach a Sinclair RAMpack to
a ZX8I.

Uncopiable cassette - blank cassette. TSH

SHARP'S INC.

Rt 10 Box 459
Meehan i c&vi lie, Va. 23111
<804) 746-1 £64 9am to 5 pm
<904 ) 730—9697 5pm to 11pm

SOFTWARE FOR T/S 2068:

WAR IN THE EAST EACH *19.95

FALL OF THE 3rd REICH 2 FOR 34.90
ARDENNES 3 FOR 49.85

BRITAIN INVADED!

FALL OF ROME
REDCOATS

These are military strategic wargames.
Write or call tor more information.

QL COMPUTER *289.00 Includes shipping
Software ?/. Hardware available for QL,
Write for catalog.

VISA & MASTER CARD accepted

AFR

Beaver Computer Prod. 26

Budget Robotics

19

Byte Back

31

Chla-Chl Chao

17

CTM

IT

Curry Computer

2$

Gulf Micro

12*

Haltronlcs

15

HCS

20,28

Larken

15!

RMG Enterprises

26:

Sharp's

30

Slmulslon

15

Softgems

9

SUM

20

Time Designs

20

Weymll

32 1

30

Controls 1-4 drives

3 inch to 8 inch drives
Shugart compatible

Single or double sided

$199 FD-68 Interface

$99 Drive 40T/DS/DD
5 inch/400 kilobyte

40/80 tracks per side

64K RAM (256K opt.)
& 8K ROM on board

VISA/MasterCard add 5X

RGB monitor output

Enhance the performance of your TS 2068 with the AERCO Disc System. All of the
speed and convienience of a full-out floppy disc system. Save, load and copy programs
at the industry standard of 250,000 bits/sec. Fully compatible with all Shugait type
drives, including those already in use with the AERCO 1000 Disc System. The 64K of
on-board RAM can be used as a second bank of system memory or for a full-blown
CP/M System (version 2.2). The RGB output is crystal clear and rock steady. The
power supply is a 5-amp high efficiency switcher. We offer a variety of other hardware

NOW AVAILABLE: 256K UPGRADE $50(2-dm

TS/2068

Floppy Disc Interface $199

Disc Drives from 79

Power Supplies 99 .

Centronics Printer I/O 69 . . . .

Dual RS-232C Serial 1/0 99

C IT0H 8510 Printer 375

C IT0H 7500 Printer 275

ROM Bd. with Auto Disc Boot n/a

RGB Cable (specify monitor) 30

CP/M (V. 2.2) 25

0 $80 (4-drive max)
TS/ 1 OOP- 1 500

$179

from 79

Box 18093 Austin TX 78760
Ph (512) 451-5874

31

WEYMIL CORPORATION

. . .makes a serious commitment to the Timex user in the development of high-quality, innovative,
and user-friendly software, complete with layman-oriented documentation, and all at affordable
prices. We are proud to offer you:

* THRUST •

Finally, real graphics power for your TS
10001 THRUST, the last word in
cursor-controlled hi -res graphics for screen
or printer output, is a software package
composed of SincArtist HR and SincArtist
1.3. Examine this sample for an idea of the
powerful versitility of THRUST.

SINCARTIST 1.3 - The original! Fantastic

hi-res graphics delivered to the 2040
printer. SincArtist 1.3 boasts excellent
user-group reviews and is simply the best
non-hardware system available. Note these

features: 1 ■

- 192 X 256 high-resolution file displayed in a 48 X 64 screen window

- Circles, triangles, rectangles, quadrilaterals, rays, inversing, and more

- 40 rede finable patterns and a variety of draw and fill nodes

- Cursor or joystick control

- No system modifications required

SINCARTIST HR - The last word in cursor-controlled high-resolution screen graphics. Copy artwork,
to the 2040 printer and save to tape. SincArtist HR requires a TS 1000 with a socketed 2K RAH,
less than $10.00 in parts, and a few minutes with a soldering iron. Super user-friendly
documentation and instructions included. All modifications are fully transparent to other
peripherals. HUNTER BOARD OWNERS: All you need is the FREE hardware upgrade that we provide!!!!!

THRUST includes SincArtist HR and Sine-Artist 1.3 (these programs are not sold separately). Die
Ultimate Hi -Res Tape is available exclusively from Weymil Corporation far only $20.

* MINI XMOD *

MINI XM3Q - Allows your Wes bridge or Byte-Back modem to up and download Timex programs to any
XModem protocol BBS.

- Fully documented with easy-to-follow instructions for the layman

- 16K and 64K versions included

- Ideal for storage in Hunter Board

- Produced on high-quality casette for the ZX 81, TS 1000, and TS 1500

MINI XMOD is available from Weymil Corporation for only $20. Please specify Westridge or
Byte-Back version.

WEYMIL CORPORATION
BOX 5904
BELLINGHAM WA
98227-5904

i

(Write for a free catalogue of other TS 2068 and TS 1000 products)

32