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The independent magazine for the independent user
September 1982
r
171
,
1
10071
11
-7171
Getting to
grips with
Spectrum
programs
1,_
Programming Tip
••••••,,,••• - - - , • • •
•
•••••••wwww•
Prestel
adaptor
to be
launched
We profile
Eric
Deeson
of EZUG
Schools
software
reviewed
ZX-8I
sails
to the
South
Atlantic
A
Spectrum
anger grows.
Plus: Eight p
of progra
rs, helplit
'nindgames
MICHAEL ORWIN'S ZX81 CASSETTES
THE BEST SO FTWARE ( BY VAR I O U S AUT HO RS) AT LO W PRICES
Qt.:(.)
. 1 "Mic hael O nNin
10 stolid well designed games which work, offer
EIt contains
S'
plenty
and choice, and are fun."
S of£ variety
5
C a From
s s the
e t ZX Software review in
t e Your Computer, May '82 issue.
T
"I h a dw y o u r Invaders,' React c as s ette
I
was
o
delighted
with this first cassette."
P. Rubython, London NW10
i
s
v"I havee been intending to write to you for some days
r howy muc h I enjoy the games on 'Cassette One'
to say
o
whichg you supplied
me with earlier this month."
o
d
E.H,, London SW4
v•• • Iapreviously bought y our Cassette O ne and
l
consider
ituto be good value for m o n e y "
e
.
Richard Ross-Langley
Managing Director
Mine of Information Ltd.
CASSETTE 1
(eleven l k programs)
machine code:
React, Invaders, Phantom aliens, Maz e of death, Planet
lander, Bounc ing letters, Bug splat.
Basic:
I Ching, Mas ter mind, Robots , Bas ic Hangman. PL U S
Large screen versions o f Invaders and Maz e o f Death,
Ready for when you get 16k.
Cassette One costs £3.80
CASSETTE 4
CASSETTE 2
Ten games in Basic for 16k ZX81
Cassette Two contains Reversi, Awari, Laser Bases, Word
Mastermind, Rec tangles , C r as h, R oulet t e, Po n t o o n ,
Penny Shoot and Gun Command.
Cassette Two costs E5.
CASSETTE 3
8 programs for 16k ZX81
ST ARSHIP T RO JAN
=
IN1:2D
Repair
o u r S tHaz
a r s ards
h i p binclude
ef o re
disaster ystrikes.
asphyxiation, radiation, escaped
biological specimens and plunging
into a Supernova.
STARTREK T h is v er s ion o f t h e w e l l k n o w n s pac e
adventure game features variable Klingon mobillity , and
graphic photon torpedo tracking.
PRINCESS OF K R A A L An adventure game.
BATTLE Strategy game for 1 to 4 players.
KAL ABR I ASZ World's silliest card game, full of pointless
complicated rules.
CUBE R ubik C u b e s imulator , w i t h lo t s o f func tions
including 'Backstep'.
SECRET MESSAG ES This message c oding program is
very txlp (lex' jf,
M AR T I AN C R I C K E T A s imple b u t addic tiv e g a m e
(totally unlike Earth cricket) in machine code. The speed is
variable, and its top speed is very fast.
Cassette 3 costs £5.
8 games for 16k ZX81
ZX- SCRAMBLE (machine code) w ith 3 stages.
Bomb and shoot your w ay through the fortifi ed caves.
a
.
G UNFIG HT
INVADERS
( mac hine c ode) ( m a c h i n e c ode)
•
Na A N A N
a a • a
a P i .
p
a -
a.
4. 4
a . M i Ae
G ALAXY IN VA D ER S (machine code)
f t
O
P
, THE'
Fleets of swooping and diving alien crdtt to fi ght of f .
. , pe.,” TNESKYTHEY
.1
SNAKEBITE (machine code)
-0, ANT-IFUNGUSEONS.
Eat the snake before it eats you. Variable speed.
,
O
N
(very
fast at top speed).
PDC
LIFE (machine code)
E
O
A ZX81 version of the well k nown game.
e
3D TIC-TAC-TOE (Basic)
L, D
Played on a 4 x 4 x 4 board, this is a game for the
E
A
brain, it is very hard to beat the computer at it.
T
FRA 7 of the 8 games are in machine code, because this is much faster than Basic. ( So me
LOD of thes e games w er e pr ev ious ly av ailable f r om J . Steadman) . Cas s ette 4 c os ts £5.
YNL
Rec orded on qualit y c as s ettes , s ent by fi r s t class pos t, f r o m:
E. Y Michael Orwin, 26 Brownlow Rd., Willesden, London NW10 9QL (mail order only please)
S
R
T
P
A
H
O
N
E
. U N G A L W I P F T I V
I
I V
I
L I N O
A
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t
GE r
•
,
• % 4
,
0 1
1
0
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N GU S
Or 4 '
sinaair
user
t imagLat ir
Editor
Nigel Clark
Consultant editor
Mike Johnston
5 S I NCLAI RV O Y ANCE Schools could soon be a thi ng of the past. We consider the
dangers of this idea.
Production editor
Harold Mayes MBE
6 PROFI LE We speak to Eric Denson. who has firm views on the future of computers in
Design
William Scolding
Editorial director
John Sterlicchi
Advertisement director
Simon Horgan
Advertisement manager
John Ross
Editorial/production assistant
Margaret Hawkins
Managing director
Terry Cartwright
Chairman
education.
9 E DUCATI O N USES Keith Jammer looks at the advantages of the ZX-8I compared to
other computers in education.
1 2 TE ACHI NG HARDWARE A number of add-ons have been produced for the schools
market. Tony Dutton investigates.
1 5 S CHO O LS SOFTWARE Dave Sayers r epor ts on how commercial softwar e is
helping to teach traditional subjects.
1 9 N E W S Clive Sinclair runs in the Cambridge half-marathon; price cut for the ZX-81
and much more.
2 1 Y O UR LETTERS You keep us in touch with your thoughts on the world of Sinclair_
Richard Hease
2 3 S TARTI NG FROM SCRATCH Our guide on how to learn to use your Z.X-81.
Sinclair User is published monthly
by ECC Publications Ltd. II is not in
any way connected with Sinclair
Research Ltd.
2 7 P RO G RAM PRI NTOUT Eight more pages of our popular programs.
Telephone
4 1 FIELPLINE Andrew Hewson looks at a variety of problems facing readers.
All departments
01-359 7481
If you would like to contribute to
Sinclair User, please send typed (or
beautifully hand-written) articles or
programs to:
Sinclair User
ECC Publications,
30-31 Islington Green.
London Ni 8/31
We will pay El ° for each program
printed and E50 for each article.
which should be approximately
1,000 words long.
.,'*Copyright 1982
Sinclair User
ISSN No. 0262-5458
Origination by
Outline Graphics.
Printed by
Eden Fisher (Southend) Ltd
Distributed by
Spotlight Magazine Distribution Ltd
1 Benwell Road,
Holloway.
London N7
01-607 6411
SINCLAIR USER September 1982
3 7 H A R D W A R E WORLD Our reviewers look at what is new in add-ons.
4 5 SOFTWARE SCENE Pac-man games have been produced for the ZX-el in large
numbers. We assess some of the earliest attempts.
4 7 SINCLAIR USER CLUB More news from our rapidly-expanding club and a new
offer to members.
5 1 c o m p u r r n o N Another of our great competitions in which we offer a 7.X.-99.
5 3 M I N D GAMES Anagrams and crosswords are considered by Philip Joy.
5 6 SPECI AL OFFER We repeat our amazing offer of E20 off the cost of the kit for the
ZX-131.
FREE I NSI DE — the first edition of our new Spectrum User section. devoted to news
about the Spectrum, its uses and problems.
NEXT MONTH
• We look into the future and how
microcomputers are likely to play a big
part in our lives.
3
M E L B O U R N E H O U S E • ZX111 • S P E C T R U M
111111iy is
this m a n
s m i ing?
You'd be smiling too if you were Dr. Ian Logan.
Dr. Logan is shown receiving the Rosetta Stone Award for
his perceptive insights into the way the ZX8 I ROM
operates. Melbourne House are proud to be the publishers
of Dr. Logan's books.
Melbourne House are Sinclair specialists, publishing books
that are winners in every category. Whether you are a
beginner or an experienced programmer, you'll need
Melbourne House books.
If you've got a Spectrum on order (or better yet. if you've
already got your Spectrum). then you'll be glad to know
that Dr. Logan is working on Understanding Your
Spectrum, sure to become the definitive book on the
Spectrum.
•
So if you want to smile like Dr. Logan, you can do one of
two things: Order one of our books from your bookseller
or fill in the coupon and really understand your Sinclair, or
you can write a great book or program and send it to us.
Who knows? Your smile may be in this ad next year!
O Machine Language Made Simple For Your Sinclair, 1
.O Understanding Your ZX81 ROM. by Dr Ian Logan. t 8 9 5
8 9 5
O Z7(81 RO M Disassembly Part A, by Dr Ian Logan, t7.00
O ZX81 RO M Disassembly Part B. by Dr Ian Logan and Dr Frank O'Hara, U3,00
O Not only 30 Programs for the ZX81: K 6
9O 5The Complete Sinclair Z.X81 Bask Course, ):17.50
1=.11 = M N
B
NMI M E I
l
l
E
M
M
O r d e r
Melbourne House Publishers.
!MEW
1 3 1
Trafalgar Road,
5
t
I T
Greenwich
o
M
London SE 10
O Please rush me your new Spectrum2X81 catalogue 'Please specify.)
P Pease send me books as marked above Note: Please add 80p for post. pack & VAT
1
Name
0
Address
1
1
1
.
NNE
Correspondence to Glebe Cottage.
Station Road. Cheddington,
Leighton Buzzard.
BEDS LU7 7NA
Postcode
MELBOURNE HOUSE • Z X 8 1 • S P E C T R U M
sinclairvoyance
Home schooling is a
dangerous dream
the day would come when th e computer
I replaced the school. He did not elaborate but
N that computers would eventually become
said
better
A
teachers than human beings.
That
conjures images of a special room in the
R
home
with a system permanently set up with a set of
E
cassettes which have to be worked through. There
C
would
be examination cassettes which have to be
completed
E
in a set time for a qualification to be
obtained.
N
With even Sinclair having sold into only two
T
percent of the homes in Britain. it will be a long time
i
before
computerised home education is the most
usual
n
system throughout the country. It is. however.
something
which can be introduced gradually, with
t
parents
being
offered the option o f choosing
e
traditional schooling or learning at home.
r In the initial stages that could be expensive, as
Government
v
help to buy the necessary hardware
would
be
needed,
together with an investment in
i
the
The cost would be on top of normal
e cassettes.
educational
costs.
wOnce the home schooling idea was accepted,
C
however,
the costs of providing education would
fall
l dramatically. Almost the whole of the present
system
would no longer be needed, with consequent
i
savings in wages and building and maintenance
v
costs.
Teachers would be replaced by a handful of
e
people
responsible for setting and updating the
cassettes
and marking the examination cassettes.
S
None
o f the thcusands o f anciliary staff —
i
caretakers,
cleaners and cooks — would b e
n
needed. School transport would become a thing of
the
c past and crossing patrols would no longer halt
traffic
at the busy times of the day. Additionally,
l
vast areas of land would become available for
a
development.
i Clive presumably visualises Sinclair Research
r
playing
a leading role in those developments. The
ZX-131
has long been a favourite machine for
s
introducing
children t o computers an d their
a
educational possibilities. The Spectrum has now
i
received
Government blessing by being placed on
d Department of Industry Micros in Schools
the
Scheme
for primary schools.
t
Sinclair
alread y provides a package o f
h
a
SINCLAIR USER S e p tember 1982
t
educational software a n d t h e moves in t o
telesoftware will make the transmission of courses
much easier. In addition, Sinclair has long had the
declared intention of developing the educational
side of its business.
With the first clues to the Z.X-83 being that it will
take Sinclair further up-market, that could be the
one which will begin the move to home schooling.
The only hints available so far are that it will have
its own screen, using the flat screen developed for
the television set, use two of the forthcoming
Microdrives, and be easily portable.
With the cost of hardware falling steadily, it
would allow everyone at last to enjoy cheap, highquality education in a form which is already
achieving good results.
It all sounds too good to be true. It is.
Schools are much more than places for learning
the subjects which appear in the curriculum. They
are a major stage in learning social skills. All
children make friends in their neighbourhood but
most friends are made at school. They also gain by
having contact w i t h others f ro m different
backgrounds. There are sufficient problems in the
world caused by a lack of understanding between
groups of people without increasing the divisions by
removing an effective way o f bringing people
together.
Human beings have achieved their development
through being able to co-operate with each other, to
do things which would have been impossible
individually. Anything which reduces the ability to
work together will work against that continued
development.
With the swift advances which have already
been made in computer-aided education, i t is
unlikely that the development will not continue. At
the moment, however, the problems of transferring
learning t o th e home seem too great t o b e
surmounted.
5
In a rare spare
moment, Eric
Deeson speaks to
Claudia Cooke.
The best man
for the jobs
convincingly a u th o r i ta ti v e
E
glare and announces: " I n 10
R
years
everyone w i l l h a ve a E l ( )
computer
and in 50 years there will
I
be
no
need
fo r schools". Such, he
C
believes,
w i l l b e th e impact o f
D
computers
on our lives and he finds
E
the whole prospect exciting.
E The 40-year-old science teacher.
S
who happens to have written some
O
30 books and to be studying for his
PhD, is forceful i n his views — so
N
fforceful that my initial reaction was
ito wonder whether he might be an
xegomaniac.
He lives and breathes work and
elets you know that he has a finger in
salmost every p i e — because h i s
yfingers are the best for the job. The
otrouble was that after 90 minutes I
ubelieved him. L too, was convinced
there was no better person to fill the
w
irole o f h e a d o f s c i e n c e a n d
tcomputing a t H i g h g a te Sch o o l ,
Birmingham.
h No better person to hold the fiveayear honorary p o st o f e d i to r o f
Physics Education; mind you, even
Deeson admits that is "th e biggest
honour I have had in my life".
No b e tte r person t o h e a d th e
Educational ZX Users' Group, w i th
its 1,500 members world-wide and
its b o a st o f h a vi n g t h e l a rg e st
Sinclair so ftw a re l i b r a r y i n t h e
world.
No b e t t e r p e r s o n t o a c t a s
consultant to so many people in the
field o f computing, or to lecture at
their conferences, o r t o squeeze
time for his own PhD on the side.
Certainly he is justified in having
six computers in his home, although
6
s
m
i
his three school-age children can be
a problem w h e n th e y a r e
programming w i t h a vengeance
when he needs to use the machines.
Deeson is puzzled by the concept
of holidays, free evenings and spare
time; i t is one o f the few things he
admits is not his forte.
" I d o n 't think I ' m i n danger o f
having a nervous breakdown o r
a n y th i n g ; I h a v e t h e r i g h t
personality to cope with all that! do;
b u t! admit that my family suffers; I
don't give them enough time.
"Yet we have a really big, superexpensive family holiday about once
every 18 months. Last time we went
to the States and I thought I would
hate it, taking no work with me, but!
found I could still switch-off and I
wasn't bored at all. I loved it,
" I never take a day off, even at
weekends; there is just so much to
do. I read computing books instead
of n o v e l s a n d I r a r e l y w a t c h
television — perhaps occasionally
the news".
Deeson l i ve s w i t h h i s w i fe , a
maths teacher, their children and a
dog and a cat in a large, comfortable
house i n a l e a f y s u b u r b o f
Birmingham. We know now about
many of the things he does, but why
does he do them all?
It a ll began in 1968. Deeson a
graduate o f Ke e l e University i n
physics and economics, had trained
as a teacher a nd wa s b y the n
working as a teacher-trainer, a job
to which he hopes to return one day.
" Pe ople d i d n o t s e e t h e
applications f o r computers i n
education a t that time but I could
see they were beginning to influence
c
L
A
our lives", he says. It was computer
awareness which he found important, far more so than a grasp of the
technical side.
By the late '60s, terminals were
entering some schools and in 1969
Deeson wr ote a n article o n the
impact o f computers i n th e n e xt
decade. He describes it as more of a
sci-fi piece than anything else and
even he could not have foreseen the
microchip; b u t th e potential even
then w a s exciting, a n d i t i s th e
potential which still intrigues him.
" I m u c h p r e f e r te a ch i n g
computer awareness courses. The
e xa mi n a ti o n s t r y t o i n c l u d e
technical facts as well as concepts
but i t becomes v e r y diffi c ult,
because those facts are changing all
the time.
m
USER September 1982
AO
" When t h e S i n c l a i r Z X -80
emerged i t was v ery ex c it ing
because at last schools could have
computers in sufficient quantity for
them to explore. It was a very crude
computer but i t had advantages
over the ZX-81 and the Spectrum
because of its very simple range of
facilities.
" The o t h e r t w o a r e v e r y
sophisticated but, particularly i n
junior schools, the keyboard is a
problem. I b e l i e v e S i n c l a i r
greatness lies in the fact that one
key has so many functions".
Deeson owns all three Sinclair
models, as well as a BBC home
education machine and an Acorn
Atom. They are indispensible to him
for his work , enabling hi m t o
develop programs, writ e reviews
SINCLAIR USER S e p t e mb e r 1982
and produce books. "It is really encouraging to find that my children
and all their friends love playing
with the computers. When the Spectrum arrived, I could not get my
hands on it for two days.
"I find in school that most of the
children a r e interested i n t he
concept of computers, i f not the
technical side. It is the girls as well
as the boys, although it is important
to make sure the girls do not feel shy
at the beginning because they feel
the boys will know automatically
what to do with a computer".
For three years, from 1975 t o
1978, Deeson took his family when
he went to Nigeria as principal of a
teacher training college. There was
no electricity, hence no computers,
but surprisingly h e loved every
minute of it.
" I enjoy responsibility and I like
administration, too. I was in charge
of hiring and firing, selecting pupils,
arranging accommodation and all
kinds of tasks. The beauty of it was
that my bosses were thousands of
miles away".
He enjoys the challenge of the
classroom. too, and feels he has
sufficient experience t o b e i n
control o f almost any situation
which might arise but he also knows
that the traditional classroom scene
may not be with us much longer,
"I am sure that within the next 50
years, perhaps less, schools will no
longer be required. We wi l l get
away from the classroom with its
one teacher and 30 children and
find real freedom. I call it computerassisted freedom".
"Obviously I do not want to see a
police s t at e b u t I t hi nk w i t h
computers that all the problems of
discipline will disappear. I want the
children to wander round the room,
playing and talking to each other
and enjoying their discoveries. It is
all part of the learning experience".
Deeson is touching on the future
of our educational system in his PhD
but he is aware that, for the majority
of teachers, projections even a
decade ahead can seem little more
than suspect and disruptive.
"The majority of teachers, like
the majority of people, still have no
contact with computers. They do not
t hink a b o u t t h e l o n g - t e r m
implications; I do not think they
want to but I don't think computers
will go away".
Deeson, who is chairman of the
West Midlands committee of the
As s oc iation f o r S c i enc e i n
Education, has s o muc h w o r k
outside his school job that it would
be fair to assume he was p _.nning to
cease being a teacher soon. That is
not so.
"Apart from the fact that I love
teaching, t h e r e a r e a l l t hes e
changes on the horizon which will
affect schools as much as anything
else. The best part of it all is that I
shall still be around to see them".
7
Use your computer in the case...
Foam rubber gives complete protection...
Purpose-built forthe ZX system...
•
us
NE
Znal & Spectrum
Custom Cases.
Just E 3 4 •
95
=r)
l
a
•
•
10
PO
:3 0
40
0
a l
•
MEM
•
• •
• •
•
• EI-111
Erm .M
•
F O R 1 •1 T O 2 2
PR I N T /
N EXT 1
PR I N T AT I I
Turn your ZX system
into a portable computing centre!
Your LX hardware -ZX81 or Spectrum is designed to work together as a system,
And now there's a simple way to make
the most of the fact.
The portable computing centre
in a briefcase.
A ZX Custom Case holds all your
hardware in the most ergonomically
,
c
n
s
i
b
l
e
p
o
s
i
t
i
o
n
s
f
o
r
e
a
piece of equipment is gripped securely by
shock-absorbing foam. Each connecting
lead fits under the foam, so there's no
chance of tangles. And as each piece is held
firmly, connections are excellent.
You can forget wasted time setting up or
unhooking the system, too. When you've
finished, simply tuck in the mains and TV
leads and replace the hinged, lift-offl id.
And of course, if you're taking your ZX
system to college or the office, ZX Custom
Cases are a lot less cumbersome than a bag
or rucksack. And a lot more protective and
professional.
Designed by ZX enthusiastsfor ZX enthusiasts.
Both the ZX81 and Spectrum Custom
Cases were designed by a group of ZX
system users and manufactured by Britain's
leading case makers. Made from impactresistant ABS, each case holds every piece of
Sinclair hardware available for the
respective computers- plus Learning Lab,
manual, software cassettes and any cassette
player up to 10' 2
"the
X hardware,
5 ' 2 simply leave the pre-cut
foam
in position, then remove it as you get
"
-"extra pieces of equipment.
. And
I when
f
brand pun
y introduced,
o
u
or
you upgrade from ZX8I to
,
h
a
v
e
Spectrum,
h a rsimply
d w contact
a r e us for a replacement
foam
n 'i insert
t s foriust Q1,95 (+p&p).
a
l
l
7
Send for your ZX Custom Case- now!
ZX8I and Spectrum Custom Cases are
guaranteed for two years, and cost just
£34
9pay more for an ordinary briefcase.
5 To order, simply use the FREEPOST
coupon. Or if you have a credit card,
( +
telephone 0276 62155, Mon-Eri, 930-5.30.
p
&
p )
e
a
c Computex Cases (IBS), Stanhope Road,
Camberley, Surrey, GUIS 3PS.
h
Plea,e allow 2ti d a , tor de I men 14 da y m melt • back undertaking
.
1R1(..amberley. Surrey, GUIS 3BR.
71
e Please send mc
,
7 . . X 8 1 Custom Cases) at
7 :L36.95
inc. L 2.00 post, paciting. inliUntri4;C each 01.
m
C Please send mc
c i t y ,•Spei. trum Custom t
oe at
- (36 95 , in 4 2 00 post. packing, insurance each.
m
m•aIsCrldOkt
e f s l a cheque/PO. 1or
p made p %ratite to Computce Cases
ub • Please debit my Act: ssss Nisi*
account no
te
•Please delete ak appropriate. PLEASE PRINT
er
' Signature
y
C Name. Mr/Mrs/Miss
ao
tu Addreks
ec
s
o
j
S
U
S
208
lu Kee in England ncr 91288.
Il
COMPUTEX
CASES
education
uses
Although omitted from the Government
support scheme, Sinclair is making an
impact in schools. Keith jammer investigates.
clair Research has succeeded
R
in its campaign for inclusion in
E
the Micros in Schools Scheme.
P The MIS scheme has always had
its critics, among whom are, o f
O
course. Sinclair users, It has been
R
claimed frequently b y teachers
T
that,
des pit e t h e exclusion o f
Sinclair
from the original scheme,
S
there are more ZX-Ells in use in
aschools than all other micros comrbined.
e Cost is the reason as much as
aanything else; one can buy six ZXs
for the price of the cheapest version
pof the machines in the scheme.
p The inclusion of the Spectrum in
ethe Government list of machines apf o r s upport i n primary
aproved
schools is. of course. a victory for
rSinclair and a recognition of comimonsense arguments. Does it imply
nthat Sinclair micros are not suited to
work at secondary level and above?
g I would like to reject that implicattion by looking at the educational
huses of micros at all levels. The
t o a i r must simply be
aquestion
whether the ZX range can cope with
teducational needs. If the machines
Scan, their remarkable cheapness is
i an added bonus, in that several can
be us ed instead o f one l arger
nmachine.
- Educ at ional u s e s c a n b e
broken.-down i nt o a number o f
categories:
• Computer awareness - the aim
Cost boosts the use of
ZX-81 in education
maximally-effective teaching i n
most subjects.
• Administration - with the com-
puter aiding the general running of
a school, as in the case of any other
business.
being to maximise familiarity with
computers, their use, their uses and • Data capture and process control
their abuses. Many schools include — again helping, as in any other
at least a few hours of such work in relevant business, with equipment
general courses followed by a l l interfacing.
Computer awareness concerns
pupils.
the
provision of courses and ex• Computer studies - the use of
perience
designed to make all future
computer hardware as t he apcitizens
familiar
wi t h computers
paratus of the formal examinationorientated c om put er s c ienc e and t h e i r s t r e n g t h s a n d
weaknesses. It is surely potentially
teaching.
• Computer-assisted learning - in the most important aspect of work in
which computer power is one of the primary schools as well as at seconmany res ourc es av ailable f o r dary level: all other applications afSINCLAIR USER September 1982
fect only the minority of pupils but
this is essential for every one.
It is also important in the sense
that it can, and must, involve a large
proportion of the staff of a school; at
the moment there are surprisingly
few teachers who know much about
computers.
Computer awareness almost explicitly excludes hands-on ex perience and programming skills.
Many schools wi t h no computer
power available have developed
successful schemes of this nature in
the last few years. It is a pity that
happens and now there is no need to
teach about computers wit hout
showing one in use.
continued on page 10
continued f rom page 9
Which one to show in use? The 1K
ZX-81 m ay b e programmed to
emulate every aspect of computing
one m ay wi sh t o discuss i n
awareness classes. The 16K ZX-81
or Spectrum, with printer, can do so
even better and at more depth but
the programs need more effort to
write.
Courses of that level need to deal
with such things as the principles of
data processing. the databank.
number-crunching, interfacing.
Computing i n situations such as
hotel booking, banking, office work
and the laboratory can al l b e
modelled adequately and cheaply
by the ZX micros.
Some com puter awareness
courses introduce programming.
both as a logical concept and to
provide the basis fo r voluntary
computer cl ub activities. T h e
Sinclairs are peculiarly suitable for
such work, being surely by far the
best beginners' machines available.
I am not certain if that applies to the
Spectrum; the exceptional features
of single key-word entry and syntaxchecking mean that even seven-
privately-owned equipment on loan.
Perhaps t h e b e s t w a y o f
consolidating computer awareness
is for the majority of teachers to use
computers as a resource in their
teaching.
That takes u s t o th e broad
important a r e a o f computerassisted learning. The success and
significance of Sinclair micros may
be gauged from the facts:
• There ar e about 25 software
houses specialising in ZX learning
products; t w o o f them , A V C
Software and Rose Cassettes, are
well-established and successful.
• The educational MUSE software
Library — administered by EZUG —
contains some 50 Z X cassettes,
after only six months more than are
available for any other micro.
• The first software and the first
publication in the Spectrum market
were both for education, both from
AVC Software.
The majority of all those products
can be classified as computer-aided
learning material; between them
they offer assistance in 12 school
subjects. Eric Deeson of EZUG has
estimated that a complete library of
'It has been claimed by teachers that
there are more ZX-81s in use in schools
than all other micros combined.'
year-olds can quickly produce
pleasing routines.
I still bemoan the demise of the
ZX-813, in fact: it was remarkably
effective even for advanced work
and, o f course, involved a less
daunting t a s k o f keyb o ar d
familiarisation.
Having introduced the subject of
computer club work. i.e., the unstructured playing with micros, I
can note yet another area in which
Sinclairs deservedly reign supreme.
There is the added advantage that
probably all schools have at least a
few pupils by now with Sinclairs at
home. The resulting facility o f
enabling school i deas t o b e
developed at home is of great value.
So too, conversely, is the possibility
of upgrading school facilities with
10
S
I
N
CAL programs covering the needs of
children aged from five to 16 would
need to contain upwards of 5,000
titles.
Any assessment of the validity of
a given micro for education must
rest in particular on its ability to
cope with the formal needs of formal
computing courses at CSE level and
above.
Those needs are two-fold. First,
the students have to undertake a
fairly lengthy programming project.
assessed as up to one-quarter of the
marks for the examination. Second,
they must have equipment available
with which they can practise and
explore t h e various concepts
studied.
There is little difficulty with the
project; t h e s t u d e n t m u s t
C
L
A
I
By kiwi permission of Griffin and George
demonstrate his programming ability and that will be restricted to some
extent, whatever machine he uses.
This year. for the first time. ZX-81s
have been used for computing projects even at advanced level.
The equipment involved needs to
be easy to use and readily available
and must include a printer. The ZX
is by far the best in that context as it
meets the requirements so cheaply
that schools can readily have a fair
number of keyboards available. The
aim must be at least one between
each two students.
If one spends money on ZXs for
formal school projects, one must be
sure that they also meet the needs of
the theoretical components of the
course.
The Z X
suitable
there. Its major lack is the
ability
to
handle files meaningfully
8 its
1 omission
but
of direct READ
i
s
DATA, arguably unnecessary i n
real
o lni f e b u t p a r t o f school
syllabuses,
an d easy entry a t
l y
machine-code level have also been
j
quoted
as precluding its effective
use.
u
sI would
t not go so far; with the
ZX
a
facilities
adequately enough to
b the necessary demonstration
allow
81
and
o exploration. Certainly many
o
schools
had no choice but louse this
u
micro
as the basis of much, if not all,
n
t
of
e their practical work.
Still, we now have the Spectrum,
ceasier to use and more versatile and
areliable — and not much more costly. That is indubitably able to meet
n
all formal school needs to advanced
e
level and, once the Microdrive and
m
network interfaces are available, is
ualmost certain to become the main
lmicro for everyday use in British
schools.
a
t
R
USER S e p t e mb e r 1982
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SINCLAIR USER S e p t e mb e r 1982
11
continued from page 9
Which one to show i
ZX-81 m a y b e p r o
emulate every aspect
one m a y w i s h t o
awareness classes. T
or Spectrum. with pri
even better and at rni
Tony Dutton looks a t the expanding
market for hardware add-ons available
for primary and secondary schools.
Peripherals can boost
uses in education
prices have put the ZX-81 a t
E
the top of the class, according
„to informed sources in the field o f
.educati on. R e a s o n a b l y - p r i c e d
.hardware mu st b e th e cri te ri o n
VDUs a n d p r i n te r s . F r o m t h e
,when a n education a u th o ri ty o r summer of 1981. just a few months
-buyer in the profession is buying a after the introduction of the LX-81,
system. It must also be versatile and
,easy enough, too, for primary school Sinclair h a d a l re a d y planned t o
7and senior school use.
chalk-up the education market on its
, That permits mo re children t o blackboard o f success. Following
,b e n e fi t f r o m a n u m b e r o f that line o f thought, i t mounted a
teconomically-priced machines than h i g h l y - s u c c e s s fu l s u b s i d i s e d
yonly o n e m o r e e xp e n si ve t y p e computer purchase scheme for U.K.
secondary schools. The result was
.serving fe w e r students. Al so th e that more than 2,300 schools took
lower-priced systems release more
kmoney f o r peripherals, s u c h a s advantage o f the o ffe r to buy one
l
i
n
d
e
c
o
n
o
m
i
c
ZX-81 and 16K RAM pack, each at
half-price.
"In al l , approaching 20,000
ZX-81s have been sold to schools, at
normal a n d su b si d i se d p r i c e s ,
making i t t h e m o s t widely-used
computer i n U .K. education. Th e
company developed its commitment
to the schools sector in November by
sponsoring a special award scheme
for Z X e d u ca ti o n a l s o ftw a r e ,"
Sinclair said.
The company has also not been
slow in developing, of all places, the
Japanese educational computer
hardware market. The ZX-81 i s
selling by mail order from Mitsui
and through selected dealers to the
key student market. The company
projects sales of 20,000 units in the
first full year and 50.000 in the
second.
Peripherals for the ZX-81 for the
educational market are limited and
few, with the majority of the few
being adequate f o r tu to r i al
purposes. That is with the exception
of the ZX printer offering full alphanumerics across 3 2 columns a n d
sophisticated graphics, if used by
commerce students for operations
such a s p r i n ti n g ready-gummed
labels.
The fa u l t lies w i th th e special
aluminium-coated paper supplied
with th e unit. Thi s situation,
however, can easily be overcome by
attaching a p r i n t e r i n te r fa c e ,
allowing the system to operate a
conventional printer. Nevertheless.
that limitation does not outweigh a
reasonable price of E59.95 Inc VAT.
A range of the interfaces supplied by Grif fi n and George.
12
A very useful feature is the 8K
basic ROM allowing flicker-free
graphics. Although it is generally
accepted that graphics play a small
SINCLAIR USER September 1982
part, if any. in school computer use,
it is worthwhile to have available.
Also for any ZX-80 systems in the
classroom it is equally expedient, as
a drop-in replacement chip. I t is
supplied w i t h n e w k e y boa r d
template and operating manual. At
£19.95 the c hip provides a ll the
features o f t h e ZX - 8 1 e x c e pt
graphics. If , however, a graphics
facility is required on the ZX-81, the
graphics m ode func tion o n t h e
40-key k e y b o a r d a l l o w s 2 0
graphical a n d 5 4 inverse v ide o
characters to be entered directly.
Recently Griffin & George introduced two new interfaces for the
Z.X-81. They interface the computer
to external peripherals so that the
system can talk to the outside world.
Simple programs permit control of
equipment, such as motors, lights
and buzzers. Even conventional laboratory experiments can be monitored, data collected and manipulated by the Z.X-81 Results can then
be displayed in graphic or numeric
form on the TV screen or printed-out
permanently using the ZX printer.
Three interfaces a r e available.
The first, the RAM-I/O Pack, plugs
straight into the expansion port on
the back of the Z.X-81. It contains
SINCLA IR USER September 1982
4KB. s o r e a s ona bly c om ple x
programs can be written without
running out of memory space. I n
addition to that memory, the unit
has a separate 8-bit input and 8-bit
output port.
That p o r t c a n b e accessed
directly f r o m t h e ZX-8 1 B a s ic
without the need to use the machine
code routines to input and output
information. The eight input a nd
output lines, along with a + 5V and
ground line, are taken to two independent 10-pin connectors on the
rear of the module.
The output lines are capable of
driving LEDs directly, so using the
RAM-I/O e na ble s t r a f fi c - light
sequences to be produced with LED
switches to be monitored and other
electrical items t o be controlled.
The opportunity for experiments is
enormous.
A second unit, called the Control
Pack, contains eight relays each
capable of switching I A a t up to
30V. The Control Pack uses mechanical relays, so the external circuitry
is isolated from the ZX-81, with a
high degree of protection provided
for the computer. The unit plugs
directly into the rear of the RAM-I/0
Pack, from which it draws its power
1
supply. A l l external connections,
both input and output, are via 2mm.
sockets.
The t hir d i n t he range i s a n
Analogue Pa c k . A ga in i t plugs
directly into the rear of the RAM-I/O
Pack. T h e unit w i l l convert a n
analogue input voltage in the range
0 to 2.55V to a digital signal to feed
to the computer.
When outputting from the computer, it will convert a digital value
from 0 to 255 to an analgue output in
the range 0 to 2.55V. External connections to the Analogue Pack are
via 2mm. sockets.
All three packs are housed in a
robust plastic case. The Control
Pack and Analogue Pack are used in
conjunction with the RAM-I/O Pack
and not on their own. Full operating
instructions are supplied with each
pack. Prices are CRA-720-H ZX-81
RAM-I/0 Pack, E35-54; CRA-724520D Analogue Pack, E18.69; CRA724-540U Control Pack, E28.05.
To keep together a ll Z X equipment in a neat working package, a
desk console is supplied by G&G. It
provides security, as all the pieces
are stuck on the console, so that they
Desk console,
are difficult to remove, and it can be
seen at a glance that all equipment
is present.
All pieces are stuck with doublesided tape, which prevents bad connections a nd prevents the equipment moving. The unit can also be
transported easily between classrooms. The console accommodates a
ZX-81 computer, 16K memory expansion unit, Z X printer, powe r
supply, cassette recorder, c a s settes, and pens and pencils. Electr ic a l c onne c tions a r e m a d e
through t he console v ia 3.5mm
jacks.
3
Fe
-
N e w Fr om F u l l e r
FD System f o r the
Z X SPECTRUM
E39•95
+ E2.50 p & p.
Professional Keyboard & Case —
This unit has the same high standard as our ZX81 unit.
Tough A.B.S. Plastic case encloses our Keyboard, the Spectrum Printed Circuit Board and
the Power Supply.
Our own Power supply is available:- 9 volts DC at 2 amps.
Mains either 110v or 240v AC at E5.95 8 0 p , p & p.
The Keyboard has 42 keys with all the spectrum functions printed onto them, the full travel
key switches have gold plated contacts and a guaranteed life of 1 0
INSTALLATION
6 o p e r a t i -oSimply
n s . unscrew the ZX printed circuit board from its case and screw it
into the FD case. plug in the keyboard and that's it. No technical know how or soldering
required. the built unit is tes ted and c omes w ith a money bac k guar antee.
Spectrum Keyboard and Case Kit E33.95
Our Mother Board for the spectrum has 2 slots at E15.95 or 3 slots at E19,95, this unit also
fixes inside the case p & p 80p.
SPECTRUM S OU N D A MPLIFIER E5.95 + 8 0 p p & p.
Complete w ith leads . v olume c ontr ol and loud
speaker in tough ABS Plastic case measuring
5" x 3" x 1" just plugs into your spectrum MIC
input.
SPECTRUM P LU G PLANNER — E18.95 + V I M p 81
Complete with 3 metres of cable, three 13
amp sockets for TV, Tape etc AND 9 volt
at 2 amp power supply with power jack to
fit Spec tr um or ZX81
The ever popular FD42 Keyboard and case
for ZX81 0 9 .9 3 including VAT & Post
FD42 as a ki t 0 3 .9 5 including VAT & Post
FD42 Built only E24.95 including VAT & Post
FD42 Keyboard Ki t E18.95 including VAT & Post
GUARANTEED 14 DAYS DELIVERY FROM RECEIPT OF ORDER, OR CALL TO THE ZX CENTRE.
Mail to FULLER MICRO SYSTEMS,
The ZX Centre, Sweeting Street, Liverpool 2. England, U.K.
AD Code
fl
Please Supply:Name
Address
SAE f or mo re det ails — E n q u irie s T e l 0 5 1 -2 3 6 6109
14
SINCLAIR USER September 1982
As t h e ZX-81 becomes m o r e popular
in education, m o r e software i s being
written. Dave Sayers tests a sample.
computers in schools is growing
T
rapidly i n both the secondary
H
and primary sectors. The increase in
the use o f micros i n education has
E
been stimulated by two things — the
N
part funding o f th e purchase o f
U
computers b y th e Department o f
M
Education and Science and the many
B
keen and interested heads of school
E
and teachers who have introduced
R
computing i n t o th e i r classrooms,
ooften using their own machines and
fprograms
m Yet th e re lies th e irony; w h i l e
were being bought there
imachines
was little o r no software available
ccommercially w h i c h w a s w r i tte n
rspecifically f o r school u se . T h e
oprograms reviewed show th a t th e
-need f o r s o f t w a r e h a s b e e n
recognised and is being filled.
There a re several points which
have to be borne in mind; loading the
programs has to be made as simple as
possible and instructions should be
clear and concise, i n booklet fo rm
where n e c e s s a r y , w i t h a n
explanation of what the program does
and h o w i t i s o p e ra te d , s i n c e
instructions included a s te x t a r e
often sparse and uninformative.
The programs should run without
bugs, use graphics i f possible, and
have interesting content together
with excellent error-trapping.
Rose Cassettes sent six tapes fo r
review. Junior Maths 1 and 2, junior
English 1 and 2, Champion Quiz and
Arithmetic f o r t h e under-eights.
Junior English 1 and 2 and Champion
Quiz are all quiz type programs and
as such, because o f th e l i mi te d
content a n d vocabulary, l a rg e l y
unsuitable for regular classroom use.
Champion Quiz, however, is better
than most of its type. Junior Maths I
includes l o n g multiplication a n d
division, fractions I and 2 and two
other programs. Th e level s e t i s
difficult but the children are taken
through each stage o f working the
answer.
SINCLAIR USER S e p t e mb e r 1982
Programs can help to
brighten school-days
Junior Ma th s 2 includes areas.
perimeters, sets and Venn diagrams.
as well as two other programs. The
standard o f the tape is really very
high, w i t h g o o d d i a g ra ms a n d
instructions. I t w a s, moreover, a
winner with the children.
Arithmetic for the under-eights is a
superb c a s s e tte , d e a l i n g w i t h
addition, subtraction, multiplication
and division. The level can be set at
units; tens and units; o r hundreds,
tens a n d units. Th e numbers a r e
shown i n l a rg e characters, w e l l suited to a classroom monitor, and
carrying is illustrated on screen, i n
stages. A really good, worthwhile
1
tape f o r classroom use, w e l l p u t
together a n d , l i k e a l l t h e Rose
software, properly error-trapped.
Junior M a t h s I a n d 2 a n d
Arithmetic for the under-eights look
like essential buys fo r a n y school
using the DC-81 i n the classroom. I
hope they will also be available for the
Spectrum, too. The tapes cost E4.50
each and each cassette runs itself
from loading.
The F u n t o L e a r n cassettes,
available from W H Smith and direct
from Sinclair by post at E6.95 per
cassette were the next t o be examined. Eight titles were reviewed,
continued on pure 16
5
104.
continued from ptige 15
English literature 1 and 2, History 1,
Mathematics 1, Music 1, Inventions 1,
Spelling 1 and Geography 1.
Spelling 1 i s an interesting idea
which unfortunately is not suitable
for school use. Words are played from
tape, listened to by the child and the
child's spelling of the word is checked
by the computer. The only trouble is
that there are too many sets of words
on each side of the cassette. 15 to be
precise, a n d th e ti me involved i n
searching for sets, as well as the fixed
nature o f th e w o rd s, renders i t
unsuitable for schools. Nevertheless.
any parent interested i n helping a
child with spelling should consider it.
Geography 1 is very good indeed,
with tw o programs — cities a n d
countries in Europe and towns in
England and Wales. When run, the
relevant m a p s appear, although
borders in Europe are not marked.
An atlas would help. The children
enjoyed it and I felt it was useful to
them, as it can teach them as well as
quiz them. A good buy.
Ma th e ma ti cs I i s a f a i r l y
ordinary mathematics tester. Th e
Rose cassettes d o th e sa me j o b
better, I feel, although this one deals
with decimals as well.
Apart from Spelling I. Geography
1and Maths 1. the other programs
are si mp l e quizzes. T h a t a g a i n
beats and note times. The four clef
programs cover alto and tenor/bass
and treble. When run, notes appear
one at a time on a short bar, which is
suitably large for use on a classroom
monitor; the graphics are very good.
The children are then quizzed on the
notes shown. A h e l p fa c i l i ty i s
included.
Beats a i m s t o te a c h ch i l d re n
rhythm b y h a vi n g t h e m fo l l o w
moving graphics. In mystery beats
the graphics a r e s ta ti c a n d th e
children have to discover the beat
for themselves.
As i n Arithmetic fo r the undereights the large graphics fi t these
programs well fo r use in front of a
class. A t E 12 fo r three they must
rank a s good value, essential f o r
music te a ch e rs. T h e y a l s o r u n
themselves fr om loading, a good
'Instructions w e r e poor. Educational
software should b e supported b y
comprehensive instructions'.
renders them, on account of content
and a g e le v e l, uns uita ble f o r
schools. Geography 1 is very good
value f o r m o n e y a n d h i g h l y
recommended. A l l t h e programs
were well error-trapped, although
they did not r un themselves from
loading.
ZX-81 Software, published b y
Brian Negus of 19 Westfield Drive,
Loughborough, Leics, LEH 3QI. has
three music teaching cassettes on
offer.
These cassettes were well errortrapped, tw o o f them dealing w i th
the various clefs and the third with
16
feature. Negus informs us that these
programs will soon be available for
the Spectrum.
AVC Software of PO Box 415,
Harborne. Birmingham. B17 9 T T
submitted two programs for review,
Tables Countdown and Geography
Hangperson, at E3 per program. The
programs a r e c l a i m e d t o b e
completely error-trapped b u t one
girl still managed to crash one when
she typed RUN NEWLINE instead of
GOTO 5 0 . Th a t w a s because, i n
using R U N , s h e c l e a r e d t h e
variables loaded fro m th e tape. I
feel th a t A V G should reconsider
that p a r t o f i t s p r o g r a m m i n g
policy.as o n e h a s t o re-load th e
program to re-start it.
Tables C o u n td o w n i s s l i g h tl y
expensive fo r what i t does, as the
Rose cassette arithmetic f or the
under-eights offers fo u r programs
of b e tte r presentation f o r £4.50.
although a simple graphics reward
is included. It tests the four rules,
without he lp, a t f o u r levels o f
difficulty.
Geography Hangperson te s ts
knowledge of locations in the British
Isles with the aid of graphics clues.
The locations are not well-thoughtout and the contents of the program
are lim ite d b u t t h e c lue s a r e
amazing — " Is there a town that
makes frisbees. Sir? It looks like a
man with his head on the wrong way
round".
I cannot recommend either o f
those two programs for school use.
The r e a r e b e t t e r p r o g r a m s
available a n d a t l o w e r c os t .
Although the A VC programs can
produce a printout of scores, so can
the Rose so ftw a re , o f w h i ch th e
children thought very highly, and so
did
They were better thought-out and
far more comprehensive than other
products, with the exception of the
Negus cassettes, which were also
very good.
Loading i n a l l cases w a s fi rstclass a n d only proves th a t good
cassettes are vital for easy loading.
Cheap tapes just will not suffice.
Instructions were poor for all the
programs reviewed; educational
software really should be supported
by comprehensive instructions i n
booklet form.
SINCLAIR USER September 1982
A U T O M A T I C TAPECONTROLLER
Z X 9 9 FORTHESINCLAIR Dall
•DATAPROCESSING
The ZX99 gives you software co n tro l o f up to fo u r tape drives
(two for reading, t wo fo r writin g ) a llo win g merging of data
files. This is achieved b y using the remote sockets of the tape
drives, controlled by USR statements or commands.
•RS232CINTERFACE
E59•95
plus
E2•95p+p
The ZX9 9 has an RS232C output allowing connecting with
any such printer using the f u ll ASCIIcharacter code (you can
now print on plain paper in upper or lo we r case, and up to
132 characters per line) at a variable band rate up to 9,600.
•SPECIALFEATURES
There are so many special features it is d if fi cu lt to list them
all, fo r example:
A UTO MA TI C TAPE COPY: Y o u can copy a data file regardless
of your me mo ry capacity as it is processed through the Sinclair
block b y block.
TAPE BL OCK SKIP: With o u t destroying the contents of RA M
DIAGNOSTIC I NFO RMA TI O N: To assist in achieving the
best recording settings.
The ZX 9 9 contains a 2K RO M which acts as an extension to
the fi rmwa re in the Sinclair ROM. The ZX9 9 's RO M contains
the tape drive operating system and the conversion to ASCII
for the RS232C output.
There is an extension board on the rear t o plug in yo u r RA M
pack (larger than 16K if required). The u n it is supplied wit h
one special tape drive lead, more are available at fl each.
• ZX99SOFTWARE
We n o w have available " E d it o r 9 9 " , a q u a lity wo rd processing
program including mail-merge, supplied on cassette fo r 19.95.
Also fo llo win g soon:
* Stock Co n tro l
* Order Processing
* Sales Ledger
• Debtors Ledger
* Business Accounts
• Ta x Accounting
Dept. SU5 Data — Assette, 44 Shroton Street,
London NW1 6UG. 01-258 0409
•E399CASSETTERECORDER
E25 inc. P 81 P.
44 Sn ro t o n Stre e t
London N WI
Tested wit h ZX81 and Acorn. Ideal f or recording
and loading your programs, Features: Cue and
Review, Din socket, tape counter, tone control.
built-in mic, autostop, mains/battery operation,
auto-record level_ 12 mont h guarantee.
Tel 01-258 0409
Please enquire about our BBC recorders,
• S T A R DP8480S
E299 p l u s E6 Securicor delivery
\
R5 2 3 2 C interface, bi-directional. 80 CPS,
• 8 0 COluMn printer. Works wit h ZX81 and ZX99
also BBC, At om, Tandy and most otndr malor
\
co M p u t e rs.
•E690REVOLVINGCASSETTERACK
Single £ 2 . 9 9 IhoIds 32 tapes or 20 in cases I
Double E 5 . 9 9 (holds 64 tapes or 40 in casesi
Treble E 8 . 9 9 'holds 96 tapes or 60 in cases!
Quad — E11,99 (holds 128 tapes or 80 in cases)
•13BCCASSETTELEAD
7 pin plug to t wo 3. 5mm plugs and one 2.5rnm plug.
Only E2 inc. P & P
COMPUTERCASSETTES
FRDERFORM
•
111,
No.
Item/Code
I-ugh quality, screw assembled cassettes supplied
with library boxes. Any lengths available.
C5 — 35p C 1 0 — 37p C 1 2 — 38p
C15 — 39p C 2 0 — 41p C 2 5 — 45p
C30 — 44p
.
•
•
•
•
•
Dept. SU5 Data — Assette, 44 Shroton Street,
London NW1 E UG . 01 2 5 8 0409
Price inc
. P
&
P
Total
Cassettes. Add min El 50 or 10% P & P.
Cheques PO made payable to Storkrose Lt d.
••••
• C h a r g e my Access/Visa No.
,
Signed
L
N
a
m
e
Address
,• • • =• =,
SINCLAIR USER September 1982
• • • = E l ,
e
l
n
•
_J
17
J.K. G R E V E
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SOFTW
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i Cin Th. games which sorra o f our competitors
J
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GAM EST APt 2 fee i i
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against a b a c k g to u n d c l i tv a nk ling s ta r s , w i t h s tu n n i n g
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esplosrons — i f you cart het the enemy
,allyelAMID Can you move the Pyramid? Make a rhestake and
C
it will colia,,z1 A Thinkers garne
A m i n The ultimate Graphic Designers ayd 8 Direction% I n
Memories. SAVE C OPY e u so u t , C LS, etc
GAPOIESTAPE 3 tor 1114
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CCM
'C ATAC OM BS A M ulti-Le ve l Graphycs Adve nture Ea ch
level con contain u p to 9 Rooms. 8 Passage. 7 Monsters,
Food. Gold. Tra ps. Phantoms, i n Exit I t o the ne st
and &W e l an infinite number of levels
NOTE T h i s is NOT one of the necessarey limited le st
MICRO SHOP
(NEXT TO STREATHAM STATION)
NEW SOFTWARE SHOP EXCLUSIVELY FOR
ZX81
PROGRAMS, GAMES, " ADDO NS "
MOST OF THE MAIL ORDER ITEMS ADVERTISED IN
THIS MAGAZINE AVAILABLE OVER THE COUNTER
LOADING PROBLEMS' TRY OUR INTERFACE
BUSINESS 81 TECHNICAL DATA HANDLING PROGS
PROPER KEYBOARDS; CONSOLES; V DUS
Adventures as SOld elsewhere
"An • m
-tot hoots " C O M P t l i f & V IDE O GAM E S
ca d e
nt
GAM ESTAPI 4 for INC
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l
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a d
ilnbe lie ,a bla Graphics' C a n y o u fi nd y our w a y thr ough th e
d i c
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t i v
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it s e lite YOU
,
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towards
,T A
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i inn lull perspective'', you've neve. seen anythrng
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like this before.
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'3 0 M ONSTER M AZE .1 the best gigee I ho•nt se e r
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m home planet. ba ckdrop o f Sta rs. M e te ors. Explosions.
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• BREAKOUT Supe r Fa st Full Screen Cleaohno Ga me . Your
, CCtime Favourite with an added twist Se e how much Monet
e
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h
us
byou ca n win and wa tch the pounds convert t o Dollars. A t
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e
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u
s
u in Machine Code for Fa il Action with 3 Speeds, 2 Be t Sizes
tc
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r
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t end three angles ot tebOundl The best BREAKOUT around
'i
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and at M a price you can't go wrong
t
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GAMES MARKE
D • I NCL. MACHI NE CODE
s
t
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Prices
o inc lude V A T and U. K , P, 8r P
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u (A d d aPProor,ate i POslacte on Fo re ig n O rders ). Chedues /P.O.s t o
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16
Brendon
Close,
Oldland Common, Bristol BS15 6 0 L
F
a
t
l
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h CREDI T CARD SALES: Phone 0 1 9 3 0 - 9 2 3 2 (9 a.m. - 7 p.m.)
eFOR I NS TANT DESPATCH
e
x
f
m
.
a
'
it you ve tte to see before buying. Our range oi o a m E r r Ar e s
v
are stocked by the following stores
Y
o
3
BUFFER M I CROSHOP
,24 Gloucester Rd Brighton,
GAMER
u
1
GEORGES
89 Perk St Bristo l, Ave ".
r
A
MICROSTYLE
29 Belvedere. lansdrown Rd .Bath, Avon,
i
d
MICRO WARE
1 3S 1 M eltonR dLe ice ste r,
i144 Sr Georges Rd Cheltenham. Glos.
it
SCREEN SCENE
e
W H SM I TH
O vr e r 200COnrouletBranches,
s
ZECIXTRA
5 e S c hoolL e n s K i n s o n . R our ne m Outh,D o r n i t
Y
p
a
lo
TRADE
r
b
u
a
s
a
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&
a
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i
18
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J.K. G R EVE S O F T W A R E LTD
P O
g
374A STREATHAM HI GH ROAD,
LONDON S W16
Tel: 01- 769 2887
S,A.E APPRECIATED FOR CATALOGUE
-
M OV IN G AHEAD
WITH
ZX SOFTWA R E
ZX CHESS Et ADVENTURES
PROGRAMS FOR T
HE
ZX-FORTH
D 0 3 1
.
8 0
16K
RAM
PACKS
I N C L U
£29.50
D I N G
1K ZX-CHESSII
E2,95
ZX CHESS I
reduced to £6.50
ZX CHESS II
now only E9 95
ADVENTURES
ADVENTURE 'A'
E6.00
ADVENTURE 'B'
ETOO
ADVENTURE 'C'
E8.00
GALAXIANS
£3.95
ZX BUG
£7.00
Full implementation of FORTH for the ZX — 10 — 26
time faster than BASIC. 'Simplicity of BASIC with
speed Ef machine code.'
BYGBYTE RAM PACKS, no wobble problems. 1 year
guarantee on each RAM PACK. The best you can boy
Immediate delivery.
We didn't think it was possible, but the game plays
against you, TWO opening rnoveS, Only 1K of menxify
needed
Very popular machine code program, with its levels of
play and an analysis option. Unbeaten except by
A new improved version with a faster response fi rm,
seven levels of play. and in addition a recommended
move option.
Exciting machine code games with Instant response.
choose f ro m t he range below Y o u fi nd yourself
stranded on an alien planet
Can you reach your ship and escape?
In a fungle clearing you come across an Inca temp*.
You must break in, collect treasure and escape alive.
Beware. Includes a cassette save routine.
You are unfortunate enough to be drawn to an alien
cruiser. Can y ou reach the control room and free
yourself or will they gel you testIn
tvroutn
sa
e
d
clu
i e.
All the features at the acarde game in a fast machine
code program. Swooping attackers, explosions arid
personalised scoring.
A 30 in 1 machine code tool and disassembly, allows
access t o all registers and t o search through, and
morditY ITIETTIOny. with cassette routines.
and many mote Fat a catalogue giving full details, please send a S.A.E to
Artic Computing
Dept EE
396 Jarnes Reckitt Avenue
Hull HUB WA.
SINCLAIR USER September 1982
ZX-81 price cut
to keep sales
THE PRICE of the ZX-81
has b e e n r e duc e d t o
E49.95. It is believed that
the move was prompted by
the need to keep sales moving in Britain, since there
has been a big fall in the
number of orders since the
announcement of the Spectrum.
It was felt that the gap
between the prices of the
7A-81 a nd the Spectrum
was n o t b i g e nough.
Sinclair Research ha s
always maintained t ha t
there wa s a market f or
both machines.
13
FACES IN THE CROWD: Clive Sinclair, left, and Nigel
Searle, head of Sinclair Research computer division, in
the crowd of runners at the start of the Cambridge
Festival half marathon. The men's race was won by Ian
Thompson with Carol Gould coming first in the women's
section.
It is also thought it is a
reaction to the announcement by Binatone that it
will b e selling a micro
costing less than EN . The
machine is being imported
from the Far East and the
launch date depends on
tests of the machine proving s a tis fa c tor y . I t i s
hoped to have it on sale
before Christmas.
The ZX-81 will soon be
available thr ough m or e
retail outlets. This follows
the signing of a n agreement wit h Prism Microproducts_ for sole distribution rights for the machine
in Britain to small retail
organisations with fewer
than 20 outlets.
Add-on guarantee gamble
ANYONE attaching a ddons t o t h e i r S i n c l a i r
machines whic h require
opening the case or removing t h e k e y b o a r d
automatically invalidates
the guarantee.
Tha t m e a n s t h a t
Sinclair is not obliged to
repair the machine should
anything g o wr ong. A
spokesman f o r Sinc la ir
Research said tha t once
the case had been opened
the guarantee no longer
obtains but in some cases,
where nothing ha d been
disturbed i n s i d e , t h e
repairs might still be free.
That came to light after
a reader wrote to Sinclair
User of his experience. PI
Shaw of Basingstoke Road.
Reading wrote that, lik e
many other ZX-81 owners,
he had bought a full-size
keyboard. The model r e quired the removal of the
computer board from its
casing and fixing it into the
new keyboard. I t w a s
a great improvement and
Shaw was very happy with
his machine.
Science dominates contest
ENTRIES for mathematics
and science applications
dominated the educational
software awards organised by Muse, the educational computing association. The r e we r e m or e
than 100 entries but the
science bias resulted i n
prizes being awarded in
only fi v e o f t h e s i x
categories.
Many o f t h e e ntr ie s
have now been accepted
into the Z X
-the Muse library which,
with
8 1 nearly 50 programs,
is
s now
e c the
t ibiggest section.
Prizes o f S i n c l a i r
o n
o
f
SINCLAIR USER September 1982
Prism is a sister company to ECC Publications
which publishes Sinclair
User. Its future plans include increasing its distribution of hardware and
software ite m s i n t h e
Sinclair market.
Winner of the
Spectrum
is announced
printers w e n t t o D a v e
Fisher of Coventry in the
primary maths/science
section f o r Bomber; t o
Charles Rowbotham o f
"Then, o n e da y , m y
Manchester under other
ZX-81
developed a fault.
primary f o r For e ns ic ;
to worry, it was fully
under secondary maths/s- Not
gua
r a nte e d, o r s o I
cience to John McMullan
thought.
of Stechford for Forensic;
"According to Sinclair
under other secondary to
Research
I had inR ic ha r d M a r i o t o f
Kenilworth f o r Bigspell; validated my guarantee by
and under othe r t o I a n opening and removing the
Souter of Tunbridge Wells computer board from its
casing," he said.
for 110G.
No award was made in
The necessary r e pa ir
the a d m i n i s t r a t i o n work w i l l c os t h i m a
minimum of E20.
category.
1
THE W I N N E R o f t h e
Spectrum and printer we
offe r e d i n o u r J u n e
competition is S j Churchman of Blandford Camp,
Dorset. F r o m a h i g h quality entry the judges
decided that his version of
an EPROM blower was the
best.
We will print an outline
of t he hardware a nd a
review of its capabilities in
our next issue.
9
N ot.-1.,rat
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oGOBBLERS
RICKMAN FOR 16K Z3C81
BEAT THA T HI GH SCORE!
GOBBLE THOSE DOTS
BEFORE THOSE MEANI ES
GOBBLE YOUI YOUR ONLY
AIDES ARE FOUR "POWER
PI LLS" WHI CH MAKE THE
MEANI ES EDI BLE. BUT
NOT FOR LONGI
P 4
5
PO R T RI P L
, 1
2 R A M packs o w w m e near 4 8 S plash( ' Cale
Booh
7
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TS umatra with foa m suer connecrof to Improve
ton& 2 7 • 4 7 • 7 0 onto,.
metlyarorcal statodet
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An enhanc ed l y ets io0 of our tor . s c a l i n g GA LA X Y INV A DE RS P R OGR A M N o n
e, t e p ro v e d i n ve rS e r S h a g "
o e
n gheS
a t e tr Scores
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•kagoe tables t ,o t dThe
sikr hr
obtained a t eac h o f 3 c lifftic ulty (Feels
o nS • as cn r de einstructions (minimum Ak R AM I
GALAXY I N VAD*ER
wt i
S tiO av attablA et o n l y
(
3
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t ctultyu levcels , 2 0 inv ader s i n 4 r o w s 01 F.
M ac hine r o d iei fonr I Di diffi
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Fun Nno ll cassette/mei instructions R A M ?
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te tcn e s th e lX
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FAMILY FUN NoP11116 R AM only
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I n e I o na gam es C a s s e tte and M anual With intr uc hons . itattngs . pr ogr am
note-%
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2 3116k R AM naadadl
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A I t , n n l y rrl et n u n t -, t e rt p . , k a g y 01 o t o c e c t u re s g e t i n g y r . t o i l e t : 3
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SUPERlNVAOER5C.I5St*.
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GRAPHICS STARTER PAC K (Pour lk Gra phics programs1
V
95
95
E
4
,
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• M A CHINE CODE D FOR
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50
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the BEST yet
from M.C. Associates
PELOPONNESIAN WA R
— a br a nd n e w 1 6 K g a m e
Your ultimate goal is a final victory over the Spartans but
you will need to deploy all your skill in a combination of
diplomacy and military force before you even stand a
chance!
Price E5.95
also
20
A L IV E A S L O N G A S P OS S IB LE I N OP E N SPACE F I L L E D IN ITH F L Y I N G R OC K S
SCORE B Y S H OOTIN G TH E M W H I C H A L S O CA US E S TH E M T O B R E A K I N T O L OTS
EAST ACTION
ZX81
TYRANT OF ATHENS
ROMAN EMPIRE
oASTER 11DS
OF LI TTLE BI TS AND M AKES LIFE EVEN WORSE!
90
I
C tO tS
,
and
te w l i s C o m p u te r m eans . S Os , iiationee, tegtek s ion I and t te ,IS
rt l eSt a nd a .
a
n
E ur
. ope a n CUS famdTS ple a s e a d d 30p pa r s o ftw a r e omen. wor le ha r de 7
c u l r o r n w s w r i te te f de ta r ls o f ha r dwa r e rnarlenv chatcrof
0d PfOversees
o r
8
BRIDGE SOFTWARE ISO)
p f u r t
IS
FERNWOOD:
M AR PLE BRIDGE, STOCKPORT. CHES SKS SHE
a h e r
,,
g d
a
p n q u i 0 c3 Pe Rte rktu rtty
,
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AN ANNOYINGLY FRUSTRATING GAME FOR ONLY E5.95
FOR 16IPE
ZXEll
,Cam el te ann 12 page ilk ottatec t book l e tw i ttl l i s ti n g s n e tA IR O tec hnic al nOteft
0
the pr ogr am s explairang the use ot P LOT. U N P L O T. P RINT SPACE A T I N K E TS,
1
GOS
UB P E E K . Th e ZX 81 r her ac lpr tables etc
ot
t h e
z
x
a
I
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THIS GAME ISASJUST AS BAD - AND ONLY E5.95
AN OFFER FOR REALHI MASOCHISTS-BOTH TAPES FOR E9.95
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MAKE CHEQUE/ PO PAYABLE TO
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ANew release " Wa rlo rd " E 4 • 9 5
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M
• Can you rule a warring village to survive fo r 30 years?
• Can you defeat the armies and samurai of other
warlords?
ZX81 16K
LOMA:MIEN
COMPUTERGAMES
• A challenging game where all results are dictated by
your own decision.
"SAMURAI WARRIOR"
Could you survive in 13th century Japan?
• In combat with other Samurai
• Fighting bandit groups
• Assisting villages
or will you co mmit ritual suicide?
Buy more than one cassette and deduct 50p from the
price of each.
Become engrossed in this game of skill f o r only £5.95
Cheques or POs please — made payable to:
M.C. ASSOCIATES
4 GRANBY ROAD, CHE ADLE FRAME
CHESHIRE SK8 6LS
LOTHLORIEN C OMPU TER GA M E S
94 Flixton Road, U r m s ton,
Manchester M31 3 4 0
Cheques or POs please, payable to:
SINCLAIR USER September 1982
Mains filter
advisers
WITH REGARD t o Pa u l
Coker's l e tte r i n the July
Over-heating stops printer
MY ZX-81 w i th 16K and
printer a r r i v e d i n m i d May fro m Sinclair. A fte r
two days I stopped 1 6 K
RAM wobble by putting a
large tea-tray into an old
cushion cover. The ZX-81,
RAM a n d p r i n t e r l i v e
permanently o n th e tr a y
and there has never been
any fu rth e r trouble w i th
wobble.
Nearly every time I tr y
to LUST a long program,
however, the power supply
pack becomes very hot and
eventually the printer goes
dead, w i t h white-out o n
screen. Moreover, i t does
not come alive again fo r
several hours, i .e ., u n ti l
the power pack has cooled.
This is no glitch or mains
fluctuation. It happens a t
any time o f day o r night
including 3 a m — n o
K-cursor a n d n o p ri n te r
for several hours.
Since my R AM pack is
now free fro m wobble —
and a n y w a y , w i t h o u t
touching anything except
to unplug fr o m th e w a l l
socket, a m e m o r y t e s t
shows 16K available when
switched o n again a fte r
the cooling period — the
fault can be ascribed only
to the power pack, which
seems unable to cope with
the printer f o r L L IST o f
more than 1K programs.
My o n l y so l u ti o n a t
present is to copy long programs, screen b y screen.
with a long cooling period
between each screen copy.
Marion Stubbs,
Southampton.
•Sinclair Research sa ys
SINCLAIR USER September 1982
that i t has never met this
problem p re vi o u sl y b u t
issue of Sinclair User, Display El e ctro n i cs h a s a
mains fi l t e r w h i c h i t
recommends f o r c o m puters. F u r t h e r d e ta i l s
obtainable f r o m 6 4 - 6 6
Melfort Road, Th o rn to n
Heath, Croydon, Su rre y.
Tel. 01-689 7702.
T Dawson
Prestwick, Ayrshire.
WITH REFERENCE to the
letter from Paul Coker on
mains spike suppression,
in July, what is required is
a tr a n s i e n t suppressor.
They can be obtained from
a radio dealer and are supplied by Radiospares: the
mains v e r s i o n i s c o d e
238-457. It is a small component w h i c h r e q u i r e s
soldering across the mains
at the input to the transformer in the power supply
u n i t, w h i c h m u s t , o f
course, b e disconnected
from the mains before dismantling.
Although the loading of
the Spectrum i s f a r su perior t o th e ZX-81, th e
Spectrum has a slight idiosyncrasy. Y o u c a n have
saved yo u r programs o n
tape and loaded successfully many times when i t
apparently refuses to do
so. The remedy is to ensure
that your batteries are a t
full voltage: a p p a re n tl y
when t h e voltage d ro p s
below the control voltage
for t h e t a p e r e c o r d e r
motor stabilisation circuit,
the speed of loading drops
and the Spectrum notifies
a ta p e loading fa u l t. Replacing the batteries w i l l
cure the fault.
F Harrop,
Hollingbury,
Brighton.
deal w i th th e points you
make in future editions.
thinks it might be due to a
heat-sensitive component
Better munch
saves battles
in either the mains adaptor
or t h e c o m p u te r . D o
readers h a ve o th e r suggestions?
MY S ON S a n d m y s e l f
enjoy Sinclair U se r b o th
for articles and programs
— which I input and they
use. The Monster Munch
by Ti m Hartnell — Ma y,
1982 — however, almost
resulted in a full-scale war
when o n e o f th e m d i scovered h o w t o escape
from the maze.
If you are at either side
of t h e b o a r d , y o u c a n
escape using a tw o -p a rt
instruction, i .e ., " N W " .
That transfers the 'H ' to
the E side of the board but
the monster cannot follow.
He is therefore safe so long
as he travels " N " or
By adding the following, I
cut off that escape route:
217 LET BS = BS +
"(SPACE)"
218 IF BS (2) = " E " AND
P>9 OR BS(2) =
AND P< 2 THEN GOTO 215
Now the monster always
munches.
Harold Cather,
Yate, Bristol.
Contact made
with flicker
TH A N K Y O U f o r t h e
machine code survey but I
make two points:
A ti p ? Wh e n typing-in
programs i f the machine is
in FAST mode, the screen
flicker tells one if a key has
made " c o n t a c t " m o r e
cheaply than buying beep
systems — a n d j u s t a s
effectively. The only thing
is not to forget to revert to
SLOW before SAVING, or
you might produce a blank
screen when the program
is RUN.
I w a n t t o kn o w mo re
about what machine code
does. I want a better feel of
what an address means —
not just jargon by way o f
definition. I w a n t t o g e t
behind the feel of hex and
the mnemonics s o th a t I
can understand what I am
doing.
So h o w a b o u t s o m e
articles fro m people who
can co mmu n i ca te t h e i r
knowledge before I go out
and buy another book? 1
want to be sure o f understanding what I read.
Bevil Redrup,
Truro, Cornwall.
Appeal for
pen-friend
I WOULD like a pen-friend
who h a s a ZX-8 1 w i t h
whom I c a n e xch a n g e
programs a n d o t h e r
things. I can be contacted
at Mollagatan 16. 50246
Boras, Sweden.
Magnus Nygren,
•Thank you for your com-
ments o n machine co d e
and we will be trying to
2
1
NOW FROM AFDEC
ZX81
RAM PACKS
16K
E25.00
Inclusive and post free.
Well proven design. Simplicity itself — Just plug in and
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MAKE THE MOS T OF YOUR MICROCOMPUTER WITH
OUR POPULAR RANGE OF PROVEN BOOKS:—
GETTING ACQUAINTED WITH YOUR Z X81 b y Tim Hannell Eighty
Plus programs in this 128-page book including draughts. E 5 . 9 5
= 2 0 SIMPLE ELECTRO NI C PROJECTS FOR THE Z)(81 and other
computers by Stephen Adams
(
6
.
4
5
— MAS TE RI NG MACHI NE CODE ON YOUR ZX81 O R ZX80, by Toni
Baker 180 pages, teaches machine code horn first principles.
E7.50
49 EXPLOSIVE GAMES FOR THE ZX81, edited by Tim Hartnell
E5.95
34 AMAZI NG GAMES FOR THE 1K ZX81 by Alastair Gourley
E4,95
El T H E G ATEWAY G UI DE T O T H E ZX.81 A N D Z U G b y Mar k
Charlton Over 6 0 programs and routines. ZX BASIC explained ,n
detail
E
6
.
4
5
'A LE ARN PASCAL O N ZX 8 1 Z X S P E CTRUM O R BBC M I C R O
COMPUTER WI TH 'PASCAL FOR HUMAN BEI NG S'. by Jeremy
Ruston, which contains a 12K compiler so you can run a limited version
of Pascal on your ZX81, ZX Spectrum or BBC Mic roc omputer Book.
plus compiler listing.
E
4
95
0 L E T YO UR BBC MI CRO TE ACH Y O U TO PROGRAM, by Tim
Hartnell. over 4C.
,
THE BBC MICRO REVEALED. by Jeremy Ruston The full story on
p
g rMa icrocomputer
m
ther o
BBC
tor the serious user
E
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GETTING
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A programs
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E6.95
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0 Sf Y MP rHO NY FO R A MELANCHO LY CO MPUTER by Tim Hartnell
o
24 gre am
t Vic ga me s
£
6
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9
5
fi
39
PROGRAMS FOR THE ACORN ATOM Best of Interface
r TESTED
s
£
6
.
4
5
tedited by Tim Hartnell
pGETTING
r
i ACQ UAI NTED WI TH YOUR ACORN ATO M. by Trevor
nSharpies
c
ia n d Tim Ha rt n e ll 1 8 4 pages . 8 0 programs . inc luding
E
7
.
9
5
pdraughts
l
e
s
INTERFACE, the monthly magazine published by the NATI O NAL
E
ZX USERS' CLUB is Just £950 (U E 12,50 (Europe) tor 12 issues
6Semple copy, with many programs tor your ZX computer, hook
,software a n d hardware reviews, education, contact addresses,
4just El .
5 •AN M i t books now COMtion S OK from supp/ement mod avedlabk• w a n i n g ) ,
Au o u r
M I
p r o g r w r i s A O ru n o n y o u r / X Sp e Cfri d rn
Please send me the items marked I enclose E
Name
Address.
.
...... . . . . . . . .
Please make cheques payable to INTERFACE and send the above form
or a copy. to: I NTE RFACE . De pt. SC 4 4 - 4 6 Ear ls Cour t Roa d.
London WEI SEJ
Rome Moot up to 28 days tor nal hient
22
Ingenious flush mounting design eliminates 'Wobble and
accidental memory loss.
Special feature — LED O n/ O ff indicator.
Coming soon — A professional keyboard at an affordable
price.
Send the coupon TODAY for your Rampack. Allow 14-21
days for delivery.
AFDEC ELECTRONI CS LTD. 318 Kempshor t Lane
Basingstoke, Hants.
Please s u p p ly .
1 6 K
Rampac k s at E25,00 inc lus iv e
Ch
ePlease
q
Print Clearly.
uName
e
P
Address
.
O
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/
M
o
n
e
y
O
r
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I Please specityl
e
INCOME
TAX
n
Checks
PAYE coding by offering you all likely allowances -c
displays
and prints your coding and its make-up, the n
l
powerful
facilities automatically calculate NI a nd PAYE
deductions
o
to five years net pay for next week or month.
Options
for overtime, salary increases, etc. Plan your income
s
for
e E6.50.
BRIDGE
d
C
Ideal
for all bridge players. Enter contract bid and made.
BRIDGE
does the rest for you. All over — trick, slam,
.
doubled
points
etc. Displays and prints scorecard, totals for
.
5. rubbers a nd all hands played. A high-class program
Z
X
E
m
Serious Application Software
for your
16K ZX-81/SPECTRUM
excellent value at £6.50.
SALES LEDGER
Excellent small business system, prints cash received/sales
day books on monthly basis, maintains ledger for 5 0 +
accounts, prints statements, names and addresses, etc.
Only fi l l
Also RE TAIL ACCO UNTI NG lE81. INDEX/RETRIEVAL
SYSTEM (E6.50)
" E2 off any 2 " E5 off any 4 • •
*Tailor-made software developed — please contact us
for a prompt quotation
Z X
S A S
(sae forNew
more
details)
42/45
Broad
St, London EC2M 10Y
SINCLAIR USER September 1392
starting from
scratch
Come to the ZX-81 with a clear mind to
make the best use of your new machine.
Lifetime's obsession can
easily be acquired
start o f a lifetime obsession
B
with home computing. I t i s
U
e a sy,h o w e ve r. t o b e c o m e
discouraged
i f everything does not
Y
go
to
plan
from
the beginning.
I
For
th
o
s
e
w
i th o n l y a l i ttl e
N
knowledge
o f computers and their
G
capabilities, t h e b e s t w a y t o
aapproach the ZX-81 i s to abandon
Z
any ideas for special uses. While the
X
basic machine is ideal for learning
-how to use computers, it is too small
8for any major uses. I t i s better to
1become accustomed t o th e ma n y
facilities and then decide how you
cwish to ue them.
a Begin by unpacking the machine,
novercoming your surprise at its size
band w e i g h t a n d , fo l l o w i n g t h e
emanual, set u p the system. I f you
tcannot g e t th e K o n th e screen.
hcheck th a t everything i s plugged
into its correct socket and re-set the
e
machine b y pulling-out the power
plug for a second and try tuning-in
again. If still nothing appears, check
the power supply unit by shaking it.
If it rattles, return it. I f i t is satisfactory, check your system with that
of a friend.
Once the K appears you are ready
to begin learning about the Z.X-81. It
can save family arguments i f you
can afford a separate television set
for your system. I t also makes life
easier if you can find somewhere to
leave your equipment set u p permanently. You w i l l fi nd that a few
power sockets a re needed and a
four-way block connector on a short
length of extension cable will help to
SINCLAIR USER S e p t e mb e r 1982
tidy trailing leads.
The manual i s w ri tte n i n great
detail a n d i s reasonably easy t o
follow. Some of the chapters may not
seem immediately relevant but it is
worthwhile reading th e m a s yo u
might m i s s something w h i c h i s
important.
Patience is needed at that stage to
learn t h e w a y s i n w h i c h t h e
computer will accept information. It
is tempting to try to enter programs
before you are really ready but that
is l i ke l y t o l e a d t o e rro rs. F o r
example, words like AND. THEN,
and AT should not be typed-in letter
by l e tte r. B y th e ti me yo u have
reached ch a p te r 1 1 , y o u should
have accumulated sufficient knowledge to b e able t o type-in o th e r
people's programs, such as those in
Sinclair U s e r a n d Si n cl a i r Pro grams, without too much difficulty.
It is important that when using the
machine it is not jolted. Some of the
connections can easily work loose
and everything which has been put
in will be lost.
The manual is not to everyone's
taste and i f you fi n d i t di ffi cul t to
follow, a number o f books on th e
market can help you. Find the one
which suits you best.
As a way of relaxing. you can buy
some o f t h e g ro w i n g r a n g e o f
commercially-produced so ftw a re .
That can be loaded directly fro m
cassette b u t make sure th a t your
machine is big enough to take the
tapes yo u b u y. Th e re a r e some
programs f o r th e unexpanded 1 K
machine but most of them require a
2
16K R AM pack. The tapes vary in
quality. I t is advisable to read the
reviews i n Sinclair User and use
your judgment to find the best.
An alternative method to learn
about the ZX-81 is to plunge in at the
deep end and see what the computer
will do. Refer to the manual when
you have difficulties. You can ignore
the fu n c ti o n s a n d ca l cu l a ti o n s
initially and experiment with PRINT
statements to obtain the feel of the
machine.
You m a y h a ve h e a r d a l re a d y
about t h e p ro b l e m i n vo l ve d i n
SAVEing a n d LOADing yo u r o w n
cassettes. The manual again gives
detailed instructions b u t many o f
the e a r l y ma ch i n e s w o u l d n o t
accept tapes fro m some recorders.
That problem is said to have been
overcome but there can still be difficulties.
Th e y u s u a l l y o c c u r w h e n
LOADing tapes recorded by other
people. One simple method to overcome this is to wind the tape to the
middle o f th e program a n d typ e
LOAD" " followed b y NEWLINE:
then slowly increase the volume of
the recorder with the tape running
until th e television screen shows
four o r fi ve thick horizontal black
bands. If you then re-wind the tape,
the program should LOAD normally.
Finally, a health warning. Apart
from any practical uses, computing
with your ZX-81 can be a very entertai ni ng h o b b y a n d i s a l m o s t
certainly habit-forming. Yo u m a y
easily fi n d yourself crouched over
your machine, red-eyed, in the early
hours of the morning, thinking that
in another five minutes you will sort
out the problem.
Try to break that habit by getting
into the fresh air and meeting other
Sinclair users.
By obtaining a ZX-81 you find that
you have joined a not very exclusive
club w i t h m a n y th o u sa n d s o f
members, many of whom would be
only too happy to advise you i f you
have difficulties.
Make sure of your regular copies
of S i n c l a i r U s e r a n d S i n c l a i r
Programs a n d you can be guaranteed many happy hours w i th your
Sinclair machine.
3
ZXEIL E D F
NIGHT
GUNNER
M I M E
TURN YOUR
ZX131
INTO CASH!
E ne m y a i r c r a f t a p p r o a c h i n g f r o m t h e r e a r !
Ca n y o u de f e nd your pl a ne a ga i ns t enemy attack ?
Beware, the mor e you shoot down, the faster they get
An exciting machi ne code vi deo game wi th impressive
graphics. Features include: best scor e of t he day, a ut orepeat on t h e c ont r ol k e y s . auto-r etur n t o the s e l f
demonstr ati ng ti tl e page.
Requires 16k RAM S u p p l i e d on tape, wi th instructions
Send details of your equipment with S.A.E.
for latest prices
1
Action packed fun for only E 4
45
FIGHTER P I L D T
15 fe e t.... 7 feet.... Touchdown!
Another successful i ns t r um e nt l a ndi ng Appoa c hi ng
at 1 5 0 knots is not al ways as easy as thi s. You are i n
ful l contr ol f r om t a k e - of f t o l a ndi ng dur i ng t h i s
r eal -ti me fl i ght si mul ati on of a j et fi ghter . T h e s k y
is the l i mi t! F l y a di ffer ent mi ssi on every time Endless
scope for i m pr ov i ng your i nstr ument fl y i ng skills
16k RAM Required. S u p p i e d on tape, with full instructions.
why start with lk?
S upe rv a lue a t C4-45
Buy secondhand and get more for your money
All prices inclusive (Overseas add E0-55 p&p per lapel
All products guaranteed, refund it not satisified
ZXBis RAM packs etc. S.A.E. for prices list
Digital Integration.
SEC ON D H A N D SIN C LA IR S
23 The Bourne, Brimscombe, Str oud.
Glos. GL5 2RP
22, Ash Church Road,
Ash, Aldershot.
Hants, GU12 6LX.
KEMPSTON (Micro) ELECTRONICS
P
:
Z
X
8
1
K
l
i
KEMPSTON (Mic r o) ELECTRONICS
k
K
0e Quantity D e s c r i p t i o n
U n i t Price A mo u n t
$.$
y
b
o
24
a
•:::
-:-:
•::
•:,.
:•:•
•:•:
•.::
This is a lull, forty key, moving keyboard
which fits into the recess left after
peeling off the existing 'touch •
sensitive' keypad Consider
the following advantages:
• Positive feedback from
keys
• Fits onto the ZX81
• N o trailing wires
• No special case needed
• Elegant design with two colour
legends.
The fully built keyboard requires absolutely no soobeong since two fl exible
connectors plug into the Z.Xl31 sockets. Alternatively, the keyboard is available es
an easy build kit at a considerable saving.
Now available with 41 keys, the extra key can be USW to give a repeat facility.: :
(22.50 Nit/ C 2 6 . 0 0 (built)
41 key version: C Z .50 (built) 1 2 3 , 0 0 (kit)
All prices inclusive of VAT, but postage must be added at 70 pence for a single
•
item, 100 pence for 2 or more items Payment by cheque or P.O.
••
••••
•
••
Av ailable by mail order from:
•
••••
?.BO Adamson Court. Hillgrounds Road, Kampaton, Bedford MK112 8 0 Z
•:::
Please allow 21 days for delivery. S.A.E. in all correspondence.
See us at the PCW Show (also ZX Microfairt
* Your Name end Addrpms
S
I
A
S
•:-:
•
M i t KA Keyboard kit (40 keys)
ZX81 Klik-Kavboard but MO keys)
ZX81
Data
P a 5 ! 1 ? 9 9 . ,
y p t a l
•:.•::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::-=•:::::::::::::::::::::::::::::::::•:•:;:;:;::::::::::::::::::::::::::
MAIL ORDER ONLY
tz'
•e
s ()* *
DEALERS — WE HAVE
4 43
A FEW TABLES LEFT
Contact:
C 4,1 .
MIKE DONNACHIE
v•
4t
4- 0
4,
WEST YORKSHIRE LS 2 8 6NZ
4 4
1 t
Northern
Premier Exhibitions
1 4
4
6 4
proudly announce their 1st
S t
4
ZX fair
O
on
U 1
Saturday, 2nd October
T
10 a.m. till 5 p.m.
H
Admission: Adults 75p.
P
Children under 14 50p.
A
PUDSEY CIVIC CENTRE,
R
DAWSONS
CORNER, STANNINGLEY,
A
NR. LEEDS.
D
(midway between Leeds 81. Bradford)
E
,
Hardware, Software, Books and Magazines —
P
everything for the ZX User.
This Fair is exclusively for ZX Computers,
U
so
come and enjoy A DAY OUT among friends
D
S
E
SINCLAIR USER September 1982
Y
,
Great games packs for I6K ZX81 •
PACK 1
AS T RO-I NV ADE RS
-lust look at these features
then look at the price!
•Superior machine code programming
•ffapid-fi ring with explosive on-screen kill effect
*High-scoring saucers 1154 aliens eac c eleratin
00estructable
g a t t a c k defence shields 00n-s c reen kill count
* High score update
*Fast action space graphics
—a new dimension in 1X81 value
AVM-1111(80M is yours on cassette for ONLY 0. 65 with
FOUR BONUS GAMES:
ARCADE G RAND - PRIX d r i v e four levels of machine code skill
PENALTY - defend your goal against the sharp shooting ZX81
GOLF - judge your shot-strength, angles, bunkers
plus machine code insect fun with SWAT
PACK 2
A
0
A
0
F
Ilultra-dynamic machine code action * hos t ile alien waves
*fast responsive controls; ship up/down, thrust, laser bolt, and smart bomb
*comprehensive sconng
Illaxplosivegraphics
•
• explosive price'
1 S u p e r b book of Revision Notes
2 P r o g r a ms of problems using random data different each time' Answers given
3 P r o g r a m H i n t s on "How to Revise"
4 P r o g r a ms of Multiple choice questions
"Most original and useful"
J
R. DERBYS.
"Very pleased with 'Physics'. please send A
P"i s t r y A
.
A. SUSSEX.
C S.A
hem
Physics " 0 " , Chemistry " 0 / C" , Biology " 0 "
E7.50 + 50p p&p
Maths "0" Part I £ 5 . 5 0 + 50P p&p
: JUNIOR SCHOOL PACK:
PLANET DEFENDER
— blast aliens in planet orbit
S C I
S
:OSTUDY
PACKS:
F
Taking
T Exams next year?
A
for
£10.00 + 50p p&p
Contains
1 T e a c h e r s "PAARKBOOK" (also suitable for sec
schools)
E
4
50
2. N e w improved version of
"JUNGLE MATHS"
5, Minster
"One of the best Junior programmes
available S . J. Lanc as t er ( E 4 50)
Gardens,
3 " M A G I C S P E LL". A versatile Nevithorpe,
Eastwood,
spelling test program ( E 4
Notts.
Planet Defender comes on cassettes for O NLY 13.55 with machine code
STO RM
through
space. BREAKOUT [machine code) r a c e against the clock, plus
GRAPHIC HANG MAN
FI G HT
16K ZX81 cassette packs l and 2 are 13.66 each I post free in U.K.). Fast
E
RS
despatch
from
John Prince
c o
29 Brook Avenue, Levenshulme,
m b
Manchester M19
a t
5
fl
e
e
t
s
o
f
s
w
o
o
p
i
n
g
a
l
i
e
n
Cassette
based
sClear "menu" operation
a
Facilities include sort, search, list, delete, change, total numeric field, save
s
Complete
with demonstration file and full instruction! application leaflet.
y
Requires
16K
Ram pack.
o
uApplications: Recipe file
Stamp/coin collections
b
Inventory Control
l
Employee Data
a
Record Collections
s
Magazine article catalogue
t
X
8
soon for B.B.C. + SPECTRUM!
The ultimate
SINCLAIR ZX 81 (16K)
DATABASE FILING SYSTEM
by DALE HUBBARD
Fed up with boring games — make your ZX81 work for you!
The one you've been waiting for!!
and load file, line print, etc.
May be used for any application where fast access is required to stored information
Access accepted
Send cheque or P.O. or credit card number to:
GEMIN I MA R K ETIN G LTD .
9 Solartron Road, Ex m outh, Devon EX8 2BR.
OR telephone us wit h yo u r cre d it card o rd e r
on Exmouth (03952) 5832
DESPATCH BY RETURN
SINCLAIR USER S e p t e mb e r 1982
ONLY
E5.95 FULLY INCLUSIVE!
c) \cfc_c.G‘tog
•„,,0
,
oe0
9
c
p
25
MICROWARE
ZX HARDWARE....
Retail Shop In LEICESTER
for S I NCLAI R Com puters
Keyboards/Ram Packs, 1 /0 Po rt s,
Monitors, G / Roms; Games, Serious,
Home/Business. Education Programs;
Books Er Magazines.
PROFESSIONAL
40 KEY KEYBOARD
• All legends and graphics in 2 colours
• N o soldering to ZX81, just plug in
•Proper typewriter keys
•RAM/Printer compatable.
Kit £19.95 Built [24.95 Case E10.213
Repeat key add on TBA.
Range of in 'out ports, music boards, motherboards, D to
A converter boards write for catalogue.
Also — N o w stocking Bo o ks a n d
Software f o r SPECTRUM, B B C an d
VIC 20.
MICROWARE
131 Melton Road
Leicester
Tel: 0533 681812
Closed
Thursday
Open
9.30
5.30
MICROWARE
23 Wa y double sided, g o l d female e dge connector,
wirewrap type E2.95
Male connector E1.25
Ribbon cable £1.40 per metre
Mastering Machine code book E5.50
Programming for real application E6•50
Tape for real applications £11.25
HARRIS Et LOCKYER A SSOC IA TES
(Sole distributors for Redditch Electronics)
Dept VC, 33 Pedmore Close,
Woodr ow South, R e dditc h, Wor c s .
Tel (0527) 24452
Prices included VAT + P + P. Overseas add (7. 80 postage.
Delivery 3 days for in stock items else allow 28 days
Official orders welcome. Send sae tor FREE catalogue,
ZETA TEACHING PROGRAMS
1X81 and SPECTRUM Top Quality Softwar e from
ZX81 1 6 K
2E51
A Range of Professionally Produced
Programs for Junior Er Middle Schools
Ages: 8
1 2 on the Space Invaders theme, this
S P E L L INVADERS -: based
encourages children to improve their
spelling.
ZSK1 R E A C T i O N TEST : improves key board familiarity.
ZNIG1 G R A P H S
:
used as an electronic blackboard to draw
bar charts 'level 1 5 M.P.),
ZMCI D E P T H CHARGE : practice in ordered triple co-ordinates in
3 dime nsions while hunting e ne my
subma rine s.
ZIVIC2 Z I G O L
ZMA1 O X 0 +
M A2 O X 0 lha A3 O X 0
Price Each Tape
Full Set
:
practice in ordered pair co-ordinates in
2 dimensions on a space-ship theme.
:
addition test.
:
subtraction test.
:
multiplication test.
E5.75 incl. VAT
Please add El for post Er packing
E42.00 incl. VAT
Please tick which cassette requited
SPELL INVADERS
ZMC2
ZIGOi
ZSK1
REACTION TEST
ZMA1
O X0 +
2MG1
GRAPHS
ZM A2
O X0 -
ZMC1
DEPTH CHARGE
ZMA3
0)(0 4
2E51
CAMPBELL SYSTEMS
ZX81 16K GULP II "The best computer game I have ever played
it beats many actual arcade games! BRI LLI ANT. " says John
Fox of Osset, Yorkshire. Endless fun even just in demo mode, and
huge numbers of variations.
E
4
.
7
5
ZX81 16K-64K THE FAST ONE the best general-purpose business
filing system around. Includes sorting, totalling, fully user definable
data and reports. All m/ c, comes with 11-page manual. £ 1 5 . 0 0
SPECTRUM SPDE self-relocating machine code Disassemble(
and Editor, shows all Z80 ops and operands, helps you develop your
own int c D r Ian Logan uses it.
E
5
.
9
5
SPECTRUM G ULP MAN This is GULP II plus colour and sound,
and has to be seen and heard to be believed. Totally machine coded.
and with scope to POKE your own joystick control.
£
5
95
All programs are supplied double-recorded on cassette, sped 1st
class return post. Prices include VAT. Dealer enquiries welcome.
Sae for full catalogue.
Name
Address
Please make cheque" PO payable to Scieni Software Engineering Ltd. and
post to' SSE1, Brookvale, Waterworks Road. Otterbourne, Winchester
502
1
2
26 D
P
CAmPRELLSYSTEMS, Dept SLI,15 Rous Rd. Buckhur st Hill.
Essex IG9 6BL. England.
SI NCLAI R USER September 1982
will l i k e Flycatcher. A bugI eating reptile squats a t the top
Fof the screen, hungry for the flies
Ywhich buzz past below it. Pressing P
causes its long, dripping tongue to
O
Uslide out and if a fly is caught on its
ltip, the tongue is retracted and the
player scores 10 points.
i There are two snags. One is that
kthe flies reduce speed when they see
ethe tongue moving in their direction.
cThe other is that the tongue cannot
rbe retracted until it bags the blueebottle; missing causes i t t o hang
ehelplessly u n t i l a nothe r v ic tim
into its clutches.
pstrays
You lose one point for every fly
ywhich starts a nd the game ends
- when the tongue touches line 1 6
cwithout c a t c h i n g a n y t h i n g .
rGraphics notes;
a60 — Graphic W. graphic 8, graphic
w5.
70 — Graphic Q, graphic R, graphic
l 4.
i 130 — Space, shifted N. shifted M.
e190 — Graphic 5.
s
ySINCLAIR USER September 1982
FLYCATCHER
l e L E T S u e
20 GOTO 5 0
30 CL S
40 L E T 5=54.10
50 L E T R = 2
0
5
70
0
8
f 0
l9 e0
100
1 01 0
1A
2 0p
130
1.10
150
150
170
180
190
2e 0 0
210
2l 21 0;
2- 3 0
240
2 5 0
260
• •
• •
P R
R II N
NT
T A
A T
T O
P
1 , 1 "
L E T C = I N T I R N D * 1 5 )
I F C 4 3 THE N GOTO 8 0
P R I N T A T o fl a ; s
L E T 5 = 5 - 1
iL tE T D = 0
P R I N T A T C , D ; " ) 4 "
L E T D= D4 1
I F D = 1 8 THE N GOTO a o
I F I NKE Y $ = " P " T HE N GOTO 1 8 0
GOTO 1 3 0
L E T T = 2
P R I N T A T R
L E T T = T - 1
L E T A= A+ 1
" I 1F 1 T = 0 T H E N G O T O 1 3 0
I F C 4 › R THE N GOTO 2 5 0
I F D ) 8 AND D 4 1 4 THE N GOTO 3
I F )4 )1 6 T HE N
GOTO 1 9 0
• T o P
27
Once the window i s reached, a
LIMB the ladder to success in
our Wi n d o w Cleaner g a me n e w ladder is started with less time
C
f BramptonBierlow,SouthYorkshire. a t t h e t h i r d w i n d o w ." Gra p h i c
r Niel explains the idea: n o t e s :
" I t involves manoeuvring a rung 4 0 - Graphic shifted E. graphic
o
to the top of a ladder in the hope of s h i f t e d 7, graphic shifted R.
mreaching a window above. Keys M 6 0 — Graphic shifted 5.
N and N are used for right and left and 7 0 - Graphic shifted 5.
i the full stop moves i t up. Hitting a 8 0 — Graphic shifted 5, space; two
e part of the ladder kills you and after s p a c e s ; graphic shifted 5.
l three lives, or running out of time, 9 0 — Graphic shifted W; 12 graphic
F
l1 th
2 LE T Hs
e:: e
r e t
mg
iri
na m
Ng I CI TP:"--. P
g7 L E T R = 5
30
SL e
mfi i
i. r
tc t i
50 P RI NT RT 0 , 0 ; 3CORE=---5
h4 s
5; 60 P R I N T R T 0 , 9 ; 1 1 1 1 1 1 - - 3 C0 k E =- ; H
o. r ,
70 P RI NT RT 0 , 2 2 ; - # T I H E = - ; T ; fo u
8 0 P R I N T FI T 1 , 9 ; 1 1 OI NDOW-. 5=";I J
ts
; "
1
hh
g
- 100 P RI NT RT ) 4 , 8
0
ai
- 10 I F I NKE V $ =
11
n
-1 ; . . f
L1 7 L O R L 1 1 1 7 2 5 = 6
5 .) - at
-R 3 0 I F R < 2 0 T H E N L E T R = R + 1
I 1N
kI t i N it e
t
Y S =
K 1AE4 0 N L EDT 1 3) 0 4
-N4 . f fR
d
N
D ) . 5
YDl7i g 0) " T3r R
N
(
R
LT=Ni !i D 5
HT A"
N
D
i
6
1$F1T=680= 0PH
E
T R R T R , LT.0 4
- 1
; - 0 4 0 3 0 0
TH
EN
Rt
m 4R. I1 NnO
N- 1 r8 o
="I DN
n
o1
l
z NTT=RTT- 1 0 , 2 0 ; T
" 1070171
R
) P LR
= E TI 0
„
,T149 0 2sI; F 6 R =- C - 1 A N D E t . D
R
t
2Nn 5 GgO T O 1 0 0
.r
D
f
A
E s
J aE
4
5 e > np
:2"
L
4
ehE T 1 . 1 = + 1
.a
T
H x
i
2E
LET V=U+1
E
N
T
t
c
G
C
rs
O
T
a
Ka=s
3-4 0 I Nhp u r R s
3O
'
i
THEN S TO P
3" 4
3
3
7 0 Gm
0
f
"I 6
0
7
10
C
at
F
s
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ne
S
l
'd
$
i5
,
s.
.
SI NCLAI R USER Sept em ber
.
g
FLET a .
ig LET n fl
,a ULT T 2 2
12i7274117-7211.:1,-x: ; MILT"RT„ z i , v
; 11
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28
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251
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1982
SLNCLAIR USER S e p t e mb e r 19132
29
CTU o
Sea -King heading tor Ilertnes
through
10agale.
if with
you• - t
I f Seay
u r as force
e l f in
returning
cannot, aid your imagination from
1
te
P R I N T - t A E L I c o p l • E l a 5 1 . , O UL_ RTI O
2 0 P R I N T - e “ T e p . FUE . O N
1 GPLLONS" F
30 I t i p u l - _ , _
3e
4.0
4.1
-,--
LeT F , , , . ue
P R I N T ...,,,
I N P U T .i_
CL-5
,7---.0 t_eT x - l w
0 . I" 4 - e
62
--'? I . r
T"" L -,.poo(3)-1
this lielcopter Landing game
,
ik G fosberry of Bognor Regis.
i
s
for the unexThe program
pancied 7.)(-80 and involves
selectding
ing both gale strength and amount of
fuel on board, then gui y o u r
craft to a pad on the left of the
screen. Graphic notes..
120—Graphic, graphic b. Q.
z ; l o -CHCr l i t, t c r T--,1-- , - ,
6,
+
C
1- 0 5 F O R 1 - t = 1 : 0
1
t r1 r0 P R I N T .
I l s o e x T 1 -1 , _ . . .
iI tao
- pp-1141r_,,,se .,x.
1 3 0 F o P J .-.A. 1
- 14-0
-- ppINTJ
s; 0 NE )c , T _ . 1 0
- I-'.I.V.2
FPoRpI N T .
:
a
156 t-lex-t_
- 1 5 5 P. P T I O _A-I R1_,
c _
_
r 11 6 0 F O R t i , . . . - A l s
4
t i c1
' e rl, i n . 1 - x = i 5 Roo Fses Ti-teN 1,%.
L ,
r
r _'DOS I FF %.4
t 4 " - - 7 - T HT e o L E )
F . P
-1°. 1 -, 1 E . . _ - s - T HeN L e, p . . . p 4. 1
, a l l I r - ' - - s - i l i er4 L e T
,
1
212 1- 1 :'''
4
2,:,C1
20 F
F P° ,PI N 2- r. .
t i
.-A.e r4e)41. c'
t ,
- , -. 1 P R I N T
. 320 P R I O T
5 p
i j F .
t :
4
Z g 2-%,:,0 P R I N - r
I
F34-0 P P I A r c *
4P
e 2 41,5 I tC1
-5 . . - . 4 , . , - r r i e o G o T
P
345
o
1.q
p
l
1
35° . .
,
p
, , l
S
. W - . 3 3 r 1 -1 - t t l t 4 e p T I
f
. tc t
l
v l
o
4
"
i e T
41t tgf
7
I
30
SI NCLAI R USER September 1982
ATIETER
VOLTMETER
CONVERSION
version isa program for thel K
A z x -61 w h i ch calculates the
value
M
M o f a re si sto r re q u i re d t o
convert
any meter to a voltmeter or
E
T
ammeter
of known range.
E R
The
program
will fi rst ask i f you
a
require conversion to voltmeter or
nammeter — you need type-in only V
dor A. It then asks for the resistance
V
of th e me te r a n d th e Fu l l Scale
oDefll ection c u r r e n t a n d t h e n ,
on whether you entered
tdepending
m
V
o
r
A
.
w
i l l a s k e i th e r f o r th e
e t
reading of the converted
emaximum
r
meter.
C
o
n
-
RIFLE
RANGE
fo r w a r d b u t e n te r ta i n i n g
R
game, submitted by Eve Gorton
I of Stockport. It involves blasting at a
Fmoving r o w o f ducks, fairground
Lstyle.
You have 16 ducks to kill and an
Eunlimited number o f bullets. Once
Ryou have run out of ducks, you can
Apress S fo r your score and sharpNshooter rating,
G "To date," she reports, "no-one
Ehas managed to shoot all 16 targets
i in only 16 shots." Graphics notes:
s85 — Graphic shifted A.
90 — Alternate spaces and graphic
ashifted Vs, 16 of each.
s
t SINCLAIR USER S e p t = ber1982
r
10
20
30
ER? •
40
50
60
70
SO
NT? 90
100
105
110
120
130
140
150
160
170
180
190
200
3 0 0
PRINT
"V OLTM
t F t
O R
AMMETER
INPUT A $
PRINT R $ ,
'
R
E S I S T
P
I RINT R ,
A
C TE F
I-NNNP U
IF A $ W = " V " T HE N G O T° 3 0 0
O
F
SID
PR
P
NT F,"RE OUX RE D FS D CURRE
F
C
U U R
M
I N PE U TN S
R
T
P
RINT
E
T
?
R
L
E
T T R = k R * F l i k S - F X
LET 6 $ = -5 HLI NT"
LET 1 2 $ =
P
- RINT l e f t
PRINT - c o m w f c r
" , S $
AR
C I RN O
P
T S" S
O F -,P R
RINT C $ ; " T H E ME TE R
-O
PA
RU
I HN
SE
T ,M
4 . 4 1S. , , " P R E S S A N Y K E Y ”
CLS
RUN
P R I N T F,'"MAXIMUI4 A F A Z I N G ?
310 3
I 2
N 0P P R I N T M
330 L E T R = ( M - ( R * F 3 ) , ' F
3U 4T0 L E T B $ =
M5 0 L E T C $ =
-3
3
1 3 0
- 5U0 LG TO IT O
M
P L I
I NR "
E
S E R I E
•:q0 P R I N T T A B 1 0 , " R I F L E R A N G E "
S2 5 P R I N T A T 5 , 0 ; " Y O U M U S T H I T
A LU L T IH E TT A R G E T S T O L E A R N Y O U R S H
AR
H P S H" O O T E R R A T I N G 30 P R I N T A T 1 0 , 0 ;
K E Y- T O F I R E . P R E S S 0 T O S T A R T
3
5R IE FS S
I N K E Y $ < )
P
4
-T 0 CHL 5 E
75 L E T s = e
0
8
F0 L E T D = 0
T
H
E
N
8
5
P
R
I
N
T
A
TO 2 0 , 1 5 1
R I F L E "
G
O
T
3
9 2 P R I N5 T A T 8 , 1 5 ; " F I R E "
95 P R I N T A T 1 0 , 0 ; A $
100 I F I N K E Y $ =
0 105 L E T R $ = A $ ( 2 TO )4 4 1 $ (1 )
F
105 I F A $ = "
T
H
E
N - THE N OOTO 2 0 0
1 1 0 OG O TSO 9 U5
G
120 I F A $ ( 1 5 ) < ) " " THE N L E T D = 1
B
125 I F D= 1 T HE N L E T A $ ( 1 5 ) = " * "
11 3 0 P R I 2N T A T 1 0 , 0 j R $
135 I F D= 1 THE N P R I N T A T 8 , 1 5 , "
GOOD S H O T "
140 I F D = 0 THE N P R I N T A T 8 , 1 5 ,
M -I S S E D
- 145 FO R J = 0 T O 1 0
146 NE X T J
150 I F D = 1 THE N LE T R $ ( 1 6 ) =
-1 5 5 - P R I N T A T 1 0 , 0 ; 1 4 $
160 I F I NKE Y $ = " F " T HE N GOTO 1 6 0
165 P R I N T A T 6 , 1 5 ; " P R I M I N G
170 FO R Y = 1 T O 1 5
175 NE X T Y
180 P R I N T S T 8 , 1 5 ; " F I R E
185 L E T D = 0
190 L E T 5=54.1
195 RETURN
200 CLS
205 L E T A $ = " A L L GONE-PRESS 5 F
OR Y O U R S C O R E "
210 P R I N T A T 1 0 , 0 , R $
215 I F I NKE Y $ < > " 5 " T H E N GOTO 2 1
5
220 CL S
225 P R I N T A T 1 0 , 0 ,
I T- W I T H ; 25 36, 0 " I F 5 > = 3 6 T H E N L E T R $ = " O H D E
S1
R. W H Y N O T T R Y A G A I N ? "
ST
2 3HA
5 OIRF T G5 >E= 2T1 SA N D 5 < = 3 5 T H E N L E T
S 1R $ = " *- S E CtO N D C L A S S * "
- 240 I F 5 • = 2 O THE N L E T R $ = • * * * F /
RST C L A S S * * "
250 P R I N T A T 1 2 , 0 :
R
- A T I N G : - " ; , R $
2
T OP P5 H O O T E R
S 6H0 AS R
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15.;
grams we have received. It is
106
"
an aid to .teaching geography,
T
r,
2 0 0 D I M- N $ ( 2 2 , 1 5 )
14111
,
2 1 0 L E Ta aNi $ ( 1 ) = " 4 5 1 6 5 1 R N I N G H A H "
with vivid flashing displays and a o n
01
220 L E T N$ (2 )="4 4 0 5 BOURNEHOUTH"
‘I
0
1neat map.
2 3 0 L E Tr n N $ C . 5 ) = " 4 2 0 B R I S T O L
11
1A
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2
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=
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2 5 0 L E T --N $ & 5 ) =
11
. Newham o f Wo r c e s te r P a r k ,
260 LET N
$(6)="4717COUENTRY"
Surrey. a n d w e cannot better his L 114.
A4 S :
2 7 0 L E T 5-N $6 ( 1
7 )6= "C6 2 0 7 D O V E R "
3
6
1
2
8
0
L
E
T
N
$
(
A H B81R) C=I
description:
2
9
0
L
E
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$ D
( 9/ ) =
2
,
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4
4
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-A G
"The p ro g ra m i s designed t o
D
300 L E T
'lii
N
$ ( 1E0 ") = " 5 5 1 1 L O N D O N
F
F
4 7$ 2A 81 L 1 ) =
teach, or test knowledge of, the loca1
iZz' 3 1 0 L E T N
....
320 LE T N
4
1$ (2A. 5l' 2
L ) =
E
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r•
lion o f towns a n d th e spelling o f
,
330 LE T N
$V( 1E 3 R) =P" 6 2 1 9 N O R W I C H "
1
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3
340 LE T N
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place names. I t c a n r u n i n t w o
O
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4
3HL57E
350 LE T N
k1
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T8 1 3 0 X FO RD"
modes — Easy, in which town names
? .rf•360 LE T N
$C( 1A6 8
) = " 3L 4 0 2 P L Y H O U T H
W
E
R
"21 I7 NT
are listed on the screen and, when a
4
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370 L E T
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=
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380 L E T
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$T (T1 I 6N) =
map location flashes. are identified 4 4 '411
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by number; or Hard, in which only
4 0 0 L E T -O
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the map appears and the name o f
O
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the flashing town must be entered.
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and spelt correctly without help.
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1
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45/
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s
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4
guesses are made, i n either mode,
71
411
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pto6,4•tx.k
the co mp u te r g i ve s t h e c o r r e c t
R. 1.K.„./ ••••,,„•,
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answer. There is a scoring system to
i i
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notes — all entries are for graphic ,
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4111'
,
shifted keys. except spaces which
N
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are inverse:
.
4 44 0 L E T L , ; = 0
100 — Q; Q. space, 5; three spaces.
1t
P=R" I• NT T
A 1T 4 5: . 1
4 aiiee
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e
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. =. 0
spaces. W. 6; 2.8 five spaces, 1./V: Q,
four spaces. R. space; 6, two spaces,
510 LET R= / NT (RND* 2 2 )+ 1
5 2 0 L E T X . m--UAL N S ( P , T O 2 )
• E . two spaces. W. 4: 2, 8. five spaces, k/
54
30 U
LN
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• W ; Q. four spaces. R. space; 6, two o
spaces. E. two spaces, IN , 4:R, seven
550 I F INKE-v *="‘s T H E N GOTO s e e
spaces; 8,6,6,5.W. space, Q. space, cs-r'
'v S = -0 " T H E N OOTO 7 6 0
1_ 1 ; •
A'
I
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X E, Y
r4 .
5 g7 e0 OI O
F T ION K
E
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Q.
three
spaces:
3,
ten
spaces,
1;
7,
S
5
4
0
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8. six spaces. W, two spaces. 6. Q,
,
c
two spaces. W : 8 . fo u r spaces. E. ,
600 PR I N T A T 0 , 5 "ER S' Y". ; A T ' ,.E,
e
s
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6
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ATU - S
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t 061.04.4
c„.
r ,
four spaces. R. to W spaces, 5; 6, Q.
44441.
i
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a
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fourteen
spaces;
Q.
7.
E.
six
spaces.
t
1444441.1
6 3 0 I F I N K E Y S = - H " T H E N 0 0 T O 6 c de
7
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Q,
fi
ve
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1
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2
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B..,
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.
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4
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1 • 4 1 .,
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S ( / , 5 T O ),;
P ERXI N
spaces, E. 1; Q, five spaces. T, 7, 2, 2, •
77 32 00 N
T TI A T I - 1 , 0 1 . ; A T / - 1 , 7 4 i N
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25?
740 PPINT AT 0 , 2 4 - P R E S 5 - " 0 " - " ;
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•
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.
760 I NP UT 8
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'
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7
70 I F 5 = R THE N OOTO SOO
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1780 I F 8 c R THE N COTO 1 0 0 0
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O t-8 P E Ltz T H E NAME
a l e FOR Y =1 TO 2 0
eae PRINT AT 2 , 0 "
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4"
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SINCLAIR USER September 1982
39
14.,111
Pb
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36 P RINT P T a , 0 , — F
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1120 P R I N T P T R-1 , 0 ;1 1 1 1 W1 1 3 0 P R I N T A T R - 1 , ;0 ; R ;
;
1140 NEXT V
1150 LE T U= U4 1
1160 P RI NT A T 7 , 1 7 ; V ;
1170 GOTO 5 0 0
1200 P RI NT AT 3 , 2 7 ;-S O ARY " ;TA6
• • •
71210 P R I N T A T 1 9 , 2 ; N S ( R ; 5 T O
1220 FOR Z = 1 TO 4 0
1230 P RINT AT 19,0,"101V;
1240 P RI NT AT 1 9 , 0 ; "
- ;
1250 NEXT Z
1260 P RI NT A T
1270
GOTO
1 1 5 0
1 B I R M I N G H A M
2 BO URNE MO UTH
3 B R I S T O L
4 C A M B R I D G E
S C A R D I F F
• C O V E N T R Y
7 D O V E R
8 L E E D S
9 L I V E R P O O L
10 LONDON
11 MANCHESTER
12 NEWCASTLE
13 NO RWI CH
14 NO TTI NG HAM
15 OXFORD
18 P LY MO UTH
17 P O RTS MO UTH
18 RE ADI NG
19 S HE FFI E LD
20 SOUTHAWI TON
21 SWANSEA
P2 Y O RK
6
rA
SINCIAMURM September m a
L
2
P RE S S
THEN
I NPUT N O
e* N E U L I N E
.
33
best invaders games we have
S
seen for the unexpanded DC81.
P You blast through a scrolled-up
hyper-space
A
attempting t o a v oid
colliding
wit
h • the dreaded black
C
inverse
spaces.
On the way you must
E
do
T your best to trawl up as many
comets and asteroids as possible.
R As the program stands, it is more
aAquestion of space dodgems than of
W
amassing
a high score but that could
be
L amended easily by reducing the
size
E of the black holes.
R Congratulations to D Pickering of
Bordon,
Hampshire for cramming so
i
much
into so little.
s
o36
n,
e
o
f
t
h
e •1•
1 L E T
3 L E T H = 16
2 0 L E T H =H + t $ 7 1
30 P P L T F•T
H
-4 -0 L
" E 8T "P = P E E N
). i P E E K 1 8 a 9 6
5 6
P E E—
N. 1 6 3 9 9 )
5E 0 L ENT 5 =' 5 + t 1 0 R t - I D P = 2 7 ) + 5 0 F t
ND 1
3 S O I F P = 1 2 8 Tk -(E N GCITCI 5 0 0
9 0 P R I N T t " 0 " r• Nts
"
)
4- I
=" 4_2• F I N D / W t . E V $ = " 5 " ) + I " P 1 )
57 Y) $ = " 8 ) R T 1 0 „ MA O * 3 C H R $ 2 7 R T
F
1 0 „ RND * 3 / C H P R N E .
4 D3 , H ; C H P lt A r T
T
,
P N D
s 1 0 _s FO I L
, 1
+ 2. 02 5
7 C; P O• L L• 1
130 GOTO 1 0
5 0 0 P P I ts I T A T 3 „ " a r s R T 1 8 , 1 .4
•
••
•
P
•
SFUE
34
SINCLAIR USER September I 9t12
THE EXPLORER'S GUIDE
To The ZX81
20 ZX S P E CTRUM P RO G RAM S
The Book f or the ZX81 Enthusiast.
PSYCOL personality assessment
500 ust del O r s generat or
Tank bat t le/ Alien chase
* P LUS LOTS M ORE *
By Mike Lord, 120 pages.
£4.96 inc V A T + P&P on cassette
Programs for 1K RAM, and programs for
16K RA M. Games, Business and Engineering
Applications. RA M Et I/0 Circuits. Useful
ROM Routines. Hin ts and Tips.
40 essential PEEKS + P OKE S for your
Spectrum and ZX81 including BREAK I N g e t
int o
any ZX81 aut o run program
Book let — 12. 00p.
f4 95
Wh at Can I Do wi th 1K?
h .. Ho g e
,iho h a n d e d t) ( 8 1
V a i e
h
n
o
A
•Wttn OK ROM
i
, F
e
5
'1 M1 I
S t
a
rB y T o n i B d A i l t N g g ag e s a t w n r n e r s . W A N t o b • g t o n e r a n d e x p e rt al i k e
4
The ZX80 Magi c Book
ECM
Mastering Machi ne Code on your ZX81
,
d
P P I m n a
c
n
o t
.$
y
,
.
b
o
o
k
,
u
r
r
o
.
1
,
9
4
.
0
p
r
o
g
r
a
m
s
a
n
d
,
C
l
u
t
i
r
.
.
,
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VISA
.
ZX AS TE ROI DS (ZX81 only)
Spec t rum v ers ion c oming s oon)
More attractive features than
Raquel Welch — E4.96p.
fT51)
ALL PRICES INCLUDE U K. P Et P AND
15% V A T W H E R E APPL I C ABL E
OVERSEAS CUSTOM ERS AD D E l 50
CARRIAGE PER ORDER
TIMEDATA LTD Dept H 5 7 Swallowdale, Basildon,
Essex SS16 5JG Tel: (0268) 411125 (MON-FRI)
2c.imEDliza
5K m/ c cassette — s imply t he best!
ELECTRIC PENCIL COMPANY
1 Mount Vernon, Hull
N. Humberside. Tel: 0482 825234
Tr a d e e n q u i r i e s we l c o me .
•
a
"THE BEST ZX81 B O O K "
If you have a Sinclair ZX81 and want to use it to its full potential
then, as the experts have all agreed, this is the book for you_ It
contains detailed guidelines and doc ument ed programs in the
areas of gaming, inf ormat ion retrieval and education, as well as a
unique listing of the 8K ROM for machine code applications
'Far and away the best o n c e again Linsac has produced the
book for the serious end of the market' - Your Computer
Nov ember 1981.
The ZX81 Companion is a most professional product w i t h many
good illustrative programs, tips and warnings
Equipment.
October 1981
. - E d u c a t i o n
'Bob Maunder's at t empt to s how meaningf ul uses of the
mac hine is brilliantly successful t h o u g h t f u l l y written, detailed
and illustrated wit h meaningf ul programs T o conclude - the
book is defi nitely an outstandingly useful second step for the ZX8 1
user'. - Educational ZX80/ 81 Users' Group Newsletter. September
1981
Send your cheque for E7,95 (includes UK p&p) to:
UNSAC
I S B N0 9 0 7 2 1
1 0 1
1
SINCLAIR USER S e p t e mb e r 1982
S
)
brough
5 5ES
6Middles
8 Barker
Road,I S
Linthorpe,
Price E7.95
35
160
ZX81
from
L I J A ; i r j a b ..b,1
t hi n
e ZX
leaders
games
Scramble
4r
1
,p
,
TAS WORD
WORD PROCESSING ON THE ZX81!
Your ZKEll bec omes a word processor wit h TASWORD. Ty pe in
letters, doc uments and pictures, s tore them on tape, and edit and
update existing documents. Wit h a printer, whic h is not essential.
you can print y our documents
TASWORD FEATURES INCLUDE
'DOVER 3 0 0 LINES of tex t in a tex t fi le.
•CURS O R CONTROL and auto repeat on all keys
•SCRO LL up and down through the text fi le.
• AUTOMATIC word-wrap and right-ius tilic ation.
• FULL ZKEll c harac ter set inc luding inverse characters and
graphics symbols.
• INSERTION A ND DELETION of hnes and characters.
CA HELP PAGE onto the screen at the touc h of a key.
•CENTRE tex t on the screen, and mov e tex t left and right.
• REFORMING of edited tex t t o a neat lay out wit h a single
keystroke
TAS WORD TUTOR
We send you a manual and a cassette. One side contains
TASWORD, The other side contains TASWORD and TASWORD
TUTOR. This teaches you word processing using TASWORO N o
programming k nowledge is required to use TASWORD.
[ 6. 50
Mail order only
A
l
fully inclusive
l
o
w
up to 14 days delivery
Please make cheques/P.O. payable t o
TASMAN SOFTWARE
17 HARTLEY CRESCENT, LEEDS LS6 2LL
The high-speed arcade
game. Easily the fastest
available. 3 2 zones.
thrust and altitude
controls.
Supplied on cassette
with libirarv case
ONLY0.95
OthergreatZXgamesandadd-ons
fromMikro-Gen:
AIDConverterBoard
SpaceInvaders
the t es t you can get, with
ever-mcreasing rate of play
Breakout
with seven bat angles to make
it really difficult
Bomber
positively addictive
I / Chess
The original-and still the best!
Sorcerer's Castle
takes you into a world of
magical adventure
Ap
o t h .o p t y
wI
,
c
L
,
,
C
1
s
e
t
t
e
ASO
1195 each ge ChessE6-501
Lets you connect analogue
joysticks to the ZX81 digital
inputs. Suitable for many other
applications, easy to c onnec t and it improves RAM pack
stability'
ONLYE18.50
Joysticks
Connect via our ND Boardmakes your ZX81 a true
programmable games
machine
ONLYE9.50EACH
Disassembler/Monitor
An absolute must when
learning machine code lets you enter and run your
own code
ONLYE.3.95
Write for full details of the Mk t o
ayaitable
from local stockists or direct from the manufacturers 'please make
rhequew
POns payable
to Mikro-Gen and add 40p post & packing)
G
en r a
g e
s.pokers or Software to &nick,
o
f
p r o g r a m s
p
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z4 A a r r eSCent Bracknell Berks RG12 2Eif
,Tel B r a c k n e ll1 0 3 4 4 I 2 7 3 1 7
36
E
C
O
M
P
U
T
A
C
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C
Jcoott i c .
167
° P i
HONE
G A
2
G E
/
L EC T
6
7
AR
1
IN
65UR
7
Pi,
167
167
31'
-62
43
7
1
15
, 35
4
1
2
1 2
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35
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61 ,
,12
la
76
65
•1 2 ,
12
264
27
-235 :
R T E5
C TR L. 2 8 4 . 2 3
544
275
An advanced spreadsheet program for the Sinclair D031
with 16 K
This
versatile s of t ware allows manipulat ion and inspection
of
R Adata
M . in t he mos t convenient way ever. Ideal for fi nancial
planning, personal budgeting, c as hfl ow analysis and countless o t h e r bus ines s , h o m e , s c ient ifi c a n d t ec hnic al
applications.
The screen acts as a window on a muc h larger grid (up to 38
x 38) of titles and numbers (up t o 9 digits). Change one
number or f ormula and all dependant results change automatically. Save on tape or printout for a permanent record.
Tasks t h a t w o u l d t a k e h o u r s w i t h penc il, p a p e r a n d
calculator c a n b e p e r f o r m e d i n s e c o n d s w i t h
COMPUTACALC ZX
Cassette and booklet - (7, 95, Available f rom W. H. Smit h,
Better Computer shops and mail order from SILICON TRICKS,
Dept S7 2-4 Chichester Rents. London WC2 1EJ. I T e 01-603
6074)
NO W
I •
S L L L S
A
P
V
A
I
L
E
C
T
R
I t
A
B
L
E
AAll C 1 A6 LK Cfl 48K
for
and
l l more
features
M of
I 6computacalcZX
mail order
v irif
SI NCLAI R USER S e p t e mb e r 1982
hardware
world
tialb
U.S. firm makes
a new printer
AN AMERICAN company,
Mindware, has produced
a blue-ink-on-plain-paper
printer f o r t h e ZX - 8 1 .
Having 16 characters per
line, it cannot produce the
full screen picture like the
Sinclair printer but t he
user can set various modes
to giv e t h e display h e
wants b y P OK E ing a
system v a r ia ble 1 6 4 1 7
with the mode required.
After tha t the printer
will react like the Sinclair
printer t o COPY. LLIS T
and LPRINT. The port used
is the same as the Sinclair
printer and an EPROM in
the pr inte r controls i t s
operation without takingup any memory space.
Mode 1 i s the screen
split in half, the left-hand
side being printed before
the right-hand side; Mode
2 will be used for extra
character s e t s i n t h e
printer. Mode 3 is for a
16-character l i n e L I S T
and Mode 0 is used for
LUST.
The paper used is the
same type as for till rolls
and the ink cartridges are
easily a v a i l a b l e . A l l
graphics are printed. The
printer costs E65. Mindware is at 70, Boston Post
Road, Wayland, MA 01778
U.S.A.
of the EPROM is E9.95 from
d'Ktrontics. 2 3 Sussex
Road, Gorleston. Gr e a t
Yarmouth, Norfolk. A keyboard is also available for
the Spectrum complete
with numeric pad for E30,
stantly by typing-in RAND plus E15 for the case, but
USR 16025.
you have to add 0 .5 0 for
It will then provide faci- postage and packing.
lities such a s a f ull r e number of GOT0s, as well
as GOS U B s a n d l i n e
numbers. Find, Insert, Delete. Move, Copy and Keep
Basic lines within a pro- CHESHIRE Mic r o Design
gram. K e e p a n d Ins e r t has produced a temperastore program lines above ture sensor for the Z.X-81.
RAMTOP t o be Inserted The device, called the 1R3,
into a not he r pr ogr a m . plugs into the EAR a nd
Alter allows you to search power sockets of a ZX-81
the program for a string of and can measure tempera-
ZXED is now
on EPROM
ZXED d ' K tronics B a s ic
editor is now available on
EPROM for those with the
graphics board from the
same fi rm. Instead of a
Long wait for the cassette
to load. it is available inSINCLAIR USER S e p t e mb e r 1982
VC
temperature
81
t
e
s
t
s
t
h
e
Mindwure printer
.characters a n d replace
them. A help instruction is
also included, giving instructions on using Z.XED.
The 4K EPROM is in the
RAM socket provided on
the graphics boa r d a nd
does not affect the use of
the other EPROM. The cost
tures fr om - 5 t o + 100
degrees centigrade.
The measurement time
is one second and a USR
machine code routine is
provided as a listing or on
cassette. T h e u n i t i s
hermetically-sealed a n d
the probe can be up to 35
metres long: two metres is
provided.
The pr obe r etur ns a
number between 500 and
2000. Accuracy is claimed
to be to one degree centigrade.
The Z R 3 c a n b e
obtained f r om Cheshire
Micro Design, 6 6 , Close
Lane, Alsager, Stoke-onTrent S T 7 2 T R . T e l :
093-63-6196. I t c os t s
E17.50 including post and
VAT for the U.K. Foreign
orders should add postage
for 240 grammes.
Ad-Lib plot
for graphics
A GRAPHICS plotter sheet
for the ZX-81 is available
from Ad-Lib for formatting
your screen display. It consists o f a plastic-coated
paper sheet 8 by 111/2in..
with t h e screen PR IN T
squares on one side and
the PLOT squares on the
other.
On the PRINT side there
is also a list of the graphics
symbols. The sheets a r e
supplied with an overhead
projection pen which must
be used. They can be reused by erasing the drawing with a damp cloth.
The cost of five sheets
and one pen is E2.50 and a
pack of coloured pens for
formatting o n the Spectrum is available at E4.75
from Ad-Lib, 2 A Grovelands Avenue. H itc hin,
Herts. Tel: 0462-56074.
Twin EPROM
from Taurus
TAURUS Computer Design
has p r o d u c e d t w o
EPROMs on a board for
fitting inside the ZX-81.
The first contains a monitor plus a n a dde d dis continued on puke 38
37
%k V
the character set EPROM
assembler i n 4 K . T h e E10, a nd t he assembler
second contains an assem- EPROM E12. Cassette verbler for rapid translation sions — monitor E8.75, disof machine code programs assembler E6 .5 0 , c ha r into bytes on which the acter set E6.50, assembler
E6.50: a u s e r m an u al i s
1-80A can run.
Together they make a pr ov ide d w i t h e a c h .
very powe r ful machine Taurus is at 47 High Street,
code f a c ilit y w h i c h i s Baldock, Harts SG7 6BG.
available at switch-on by Tel: 0492-893900.
using a USR routine. The
board fits underneath the
keyboard a nd resides i n
the memory from 8K-16K.
There is also a word pro- GORDON Electronics has
cessing EPROM (4K) which produced a keyboard in a
will provide u p t o fi v e case whic h requires n o
character sets, including soldering to attach it to the
lower-case c ha r a c te r s . ZX-81. The pins provided
The m o n i t o r , d i s - on the end of the ribbon
assembler, assembler and cable push into the keycharacter s e t a r e a ls o board sockets on the ZX-81
available on cassette.
printed circuit board.
The board and monitor
The cost of the keyboard
disassembler costs 0 0 , is E25.50 and in its case it
continued from page 37
Gordon
keyboard
is E37.50. including VA T
and postage.
Gordon Electronics, 7 6
Mountbatten Road, Braintree, Essex CM7 6TP. Tel:
Memotech — added to give
48K of usable memory.
The black box is a Centronics-parallel port plus
driving software to run a
printer. T h e 3 2 K R A M
costs E 4 9 . 9 5 . H i - r e s
E61 .80, Centronics por t
0376-26048.
Memotech
expansion
E41.90.
Memoteeh Ltd, 3 Collins
Street, Oxford 0 X 4 1XL.
Tel: 0865-722102.
N1EMOTECH ha s a dde d
three new black boxes to
its range. A hi-res board —
192 x 256 pixels — can
have its memory page anywhere in RAM and it can
also have more than one of
the 6 .5 K pa ge s s tor e d
in m e m or y f o r r a p i d
graphics. The hi-res can be
used w i t h a n y o f t h e
company's RAM packs. including the new 32K.
The 32K RAM pack can
have an existing 16K RAM
pack — not only f r om
Mansfield
printer paper
MANSFIELD Computers
and Electronics now supplies pr int e r pa pe r a t
£10.95 for six rolls, as well
as software and books for
the Z X user. Mansfield
Computers and Electronics
is a t 7 6 Ratcliffe Gate.
Mansfield, N otts N G1 8
2113. Tel: 0623-31202.
N e w for ZX81 users
EVENMORE MEMORY WITH OURBYGER BYTE
32K+ RAM PACK
Why put aside your 16K RAM Pack when you can use it
together with the new Byger Byte 32K + Ram Pack to give
you 48K of memory.
No trailing leads or wires — all you need do is plug the existing
16K Ra m Pack into the back o f the n e w Byger Byte
32K + Ram Pack and Bingo 48K of memory.
Name
Address
Make cheques payable to Phoenix Marketing and I enclose
my cheque/ PO for E
Please debit my Access/ Barclay Card
11 I 1 I I I 1 I I
Date
Uses existing power supply. New 32K Ram Pack is tested and
guaranteed with the following 16K Ram Packs-Byg Byte,
Sinclair, Downsway.
Also available: 16K Ram Packs 122, new 32K + Ram Pack
139.50, Standard 32K Ram Pack 135, 64K Ram Pack 153.95.
Tape loading interface for trouble free loading of program
19,50. New high quality keyboard with bleep and reset 149.96.
All prices are inclusive of VAT and free postage and packing.
Signature
•New32K Ram Pack
E22•03
• Standard 32K Barn Pack
£39.50
•64K Ram Pack
653.95
1850
• Tape boarding interface
• New high-quality, fully cased
149.95
keyboard
*Please indicate otder by ticking boxes
0
0
PHEONIX MARKETING
OAKLANDS HOUSE, SOLARTRON ROAD, FAR NBOROUGH, HANTS.
TEL: (09552) 514990
SINCLAIR USER September 1982
GREAT NEWS for ZX81 AND Spectrum owners!
H I R E
ZX Educational
Software
z x just
cassettes
for
El each!
Why pay up to El 0 or more for a s ingle cassette& programs — whic h
may only interes t you for a while— when you can hire f rom a vast
range of 130 programs for just El (plus 25p p ip ) for a f ort night !
Software Library caters for users of ZXEll (1K and 16K) and Spec trum
—and it 's ideal if y ou're think ing of upgrading, for you can s witc h to
tapes s uitable tor your new hardware at any time, at no ex tra cost,
knowing you hav en't tied up your money unnecessarily.
Subjects inc lude exciting machine-code games, educ ational, toOlkit
and home/ club! business utility programs . A L L cassettes are genuine
commercial originals , and a free quarterly news letter packed wit h tips
keeps you up•to-date with new introductiOnS.
SPECIAL OFFER! Join NOW and get your first tape on FREE hire
,
iws
SL
The Sinclair Owners'
SOFTWARE LIBRARY
SU
Heat her Cottage, Warren Road,
Liss, Hants GU 33 7DD.
/e •
a
)
p,r to join the Software Library for the next 12 months, and enclose my
membership fee of E5. Please send my fi rst program tape on free hire, plus
a list of others available. I understand that I am under no obligation to hire
spy minimum number of further tapes, and that if I'm dissatisfied with my
first tape you will refund my money in full and without question.
NAME
ADDRESS
•
T
e
l
No
own a Sinclair Da il I K ; LX111 16K I ZX Spectrum (delete as appropriate)
Spec t rum J unior Educ at ion
E
5
.
5
0
Use your Spectrum to help your children wit h their school work
This cassette contains eight attractive, easy-to-use programs for
the 7 to 11 age group.
Topics include English comprehension, spellings, homophones,
junior science, maths and history.
Entering your own questions and answers allows you to adapt two
of these programs for exercises in any subject area.
Moving colour graphics and sound are extensively used to improve
motivation.
Suitable for 16K and 48K machines, User documentation supplied
with the cassette.
0-Lev el Chemis t ry (Cl)
E
5
.
5
0
This cassette c ont ains f our clearly presented revision/ tutorial
programs. The subject matter has been carefully structured to cover
the most important aspects of:
* Elements, compounds and mixtures.
* Structure, bonding and properties.
• Redox, electrolysis and the activity senes.
* Acids, bases and salts_
48K Spectrum and 16K ZX81 versions of the cassette are available.
Please specify which you require
Professional Computer Assisted Learning materials from:
CALPAC CO MPUT ER SO FTWARE
108 Hermitage Woods Crescent, St Johns,
Woking, Surrey GU21 1UF.
Overseas orders: C6•50 ($1 I 60) per cassette, includes AI RMAI L
. pos t age
-
E' Z X 8 1 / 1 6 K SOFTWARE
LI " S T A R T R E K "
£ 4 . 9 5
16K S T A R T R E K : E x c it in g s pac e a d v e n t u re g a m e in c lu d in g
klingons starbases, phasors, 8 8 galaxy, 4-levels of play, long
and s hort range scanners, etc .
Li " S U P E R - W I M P U S " E 4 . 9 5
i s K S UP E R W U M P U S : Ca n y o u h u n t a n d c at c h t h e
my s terious wu rn p u s in h is u n d e rg ro u n d laby rint h? I n t rig u in g
underground adv ent ure
Li " G R A P H I C — G O L F " £ 4 . 9 5
16K GRAPHI C GOLF: Try out your golfi ng expertise, on the
computer's golf course, 18-different graphically display holes.
Haz ards , inc lude lakes, trees , win d , ro u g h etc ,
Li " G A M E S PACK 'I " £ 4 . 9 5
16K GAMES PACK 1: Fantastic value for money, nearly 50K of
programs on one cassette. Five games including "Real Time
G raphic " L u n a r L a n d e r , S t a r wa r s , H a m m u r a b i , M in e fi e ld ,
Mas t ermind.
ZX-ARCADE ACTION
El N E W ! ! "MUNCHER!!" E 5 . 9 5
At last Pacman f or your 2X-81, all the arcade features plus!?
software for the OS character board,
"SPACE-INVADERS" £ 4 . 9 5
Simply the best yet, t he closest thing t o real Invaders on the
ZX81. Full arcade features! including 1 or 2 player option and
software to drive the OS character-board.
1_1 " A S T E R O I D S "
£ 5 . 9 5
Authentic representation of the arcade game including 1, A,
thrust and fire controls, 5-levels of play and alien spaceships.
Ii " D R O P O U T '
£ 5 . 9 5
Exciting NEW arcade game. Can you destroy the aliens before
they build up in their atomic plies and overwhelm you,
Dealers enquires welcome, generous discounts.
When ordering 2 or more deduct E1.00 Send S. A E lop Catalogue.
Tick boxe(s] required.
Cheques: POs payable to ''SILVERSOFT"
Name
Address
W A N T E D
D u o . Spectrum B B C Micro Software
E•celirni Olovaito, S
t o r delads
All Ar e i (l e ga m e s r un i n 4K
SI LVERSOFT I Dep_ SU7)
35 Bader Park, Bovverhill,
elksham, Wiltshire.
SINCLAIR USER S e p t e mb e r I 9 82
.39
HILDERBAY LTD
GAMES PACK
De ar m a ?or a wo r • Fred tag
Congdon 5
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1City
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Professional Software
He w te p e e s e ase s c o e d , •
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GOTO'l soci GOSIoll • lnCitoCiall in
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l i s t s 5O4 y, e r, ! w e c o n t e m n '?
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from tape first time every time! E5.95.
ZX-81 16K RAM packs, comprehensively tested
(for bad bits, addressing faults, printer, saving)
£30.
c
0
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1
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SCREEN KIT 1 M O R E POWERTOYOURSCREEN
inBasic programs
BORDERS- anysize anywhere onscreen
SCROLL• inALLFOURdirections
FILLSCREEN any graphic or character
CLEARandREVERSEPARTOFSCREEN - anypart
FLASHINGCURSOR- anywhereonscreen- simulatesINPUT
£20 until 21 September
E9 (2 programs)
each
Financial Pack I
Gold
SPECIAL GRAPHICS
ROUTINES
p
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ZX Software
L
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withDATAFILES
S
SUPERBVALUEE5.70co
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I E7.50
P
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S
Hidarbay Loading Aid. Load your microcomputer
Time Ledger
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s e ai n • R E M S l a t • f n • S t
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Tape recorder suitable for microcomputer use,
aligned and tested on computer signals122 + E2 p&p.
Budget Iftli
W a w a * . taa
G RAPHI CS
TO O LKI T
Details from us.
48K Payroll f25 until 21 September
Optimax
TOOLKI T
ALL ON ONE CASSETTE EOITI
ONLY Ee 95 et9 90j
SPECTRUM
SOFTWARE
now available!
Beamscan (beam analysis)
Payroll
Stock Control
• 2 9 5 i T ?AL t a t r a . a re to w
te e RAU 2 .dar
SAVEBASICVARIABLESoncassette
LOADback intoANTprogram
all al DOUBLESPEED
andMEMORYLEFT
OHO PylesGI incline code gwesINSTANTANEOUSSCREENRESPONSE
•Becomes girl of your Basicprogram
•
•Nc, need lo load segirilMY
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m
codeand Sbiiefttry
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ZX-MC M A C H I N E CODEDE-BUGIMONITOR
These programs have been described and reviewed
previously (or we can prove details).
SPCOffighellatUft5101 5 Detug COBIRIVICIL Inreodirri IWOcrupes 2'•rA RAM In B ow area
REGISTERSDISPLAY&BREAKPOINTS • S u o p i e d i onset* wit. 36 me insovai
All prices include VAT, and are post free. Sale prices are valid
until 21 September 1982. Fre e updates, comprehensive
telephone and personal support, and competition prizes are
not available for summer sale purchases.
•SAVE,LOAD.VERIFYATDOUBLESPEEDfromanypartofRAM
wait mactimecode ravines operating
fromBISICarea of RAN
some your WCprogramsaboveBasicarea
Screenmeencer Of AEInevermoves
• SELFcowTAINEDeteuln 10
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S e sc aunnotmbe vset,
, *Ile B a wl:. perms C 0
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C.W.O.
HILDERBAY LTD
Professional Software
REM-LOAD MACHINE CODEENTRY/DE-BUG
8/10 Parkway
Regents Park
London NW1 7AA
Tel: 01-485 1059 T e l e x : 22870
•
40
XI 1
4A10 641(
11 SPECTRUM
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anu
t al
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SINCLAIR USER September 19B2
m
f
a
bi
•11111111111111
NI, l i n I I goilting . 1 0 1
II die e l
M
IN PPP' IN 1 1 1 1
11 1 1
-NIL OMNI
M I L 11111110
.
1
111 V I1M1 *NON
111
aMnI M
gI Mat
":1;
-
A
CONSTANTS"
60 DIM B(3,10)
70 FOR I = 1 TO 10
80 FOR J = 1 TO 3
90 INPUT B(LI)
100 NEXT
110 NEXT I
120 PRINT "INITIALISATION
COgrwin
No', 4 4 6 .
soiO •
COMPLETE"
130 GOTO 10
1,
•
•'
a.;
Andrew Hewsnn.
Data handling can be
achieved on ZX-81
has a theme this month, as the
I
letters in my postbag have been
C varied: i t must be something to
too
A with the weather. John Perry of
do
N Mai den, Su rre y, w ri te s: " I
New
have
N been trying to convert a program
O written for the TRS-80 but the
program
u se s D A TA a n d R EAD
T
statements which are not available
c
on th e Z X
l
jumping
on the machine because i f
acannot handle data it is useless."
it
81..
i
I There is a solution to the problem
but
m fi rst let me explain that DATA
a
m
and
t READ statements provide a
cmethod
o n fo r declaring the value o f
h
s i d at the time the program is
variables
a
e
r i to save the user from enterwritten,
t
n gt h e i te m s a t ru n -ti me . F o r
ing
t
example,
the lines:
h DATA 1. 2, 3
10
20
e READ A. B. C
will
c assign the values 1.2 and 3 to A,
Boand C respectively every time the
program
i s RUN. The same effect
l
could,
o
f
course, b e achieved b y
u
using
m LET A = I
10
n LET B = 2
15
20 LET C ,, 3
The r e a l p o w e r o f D ATA a n d
SINCLAIR USER S e p t e mb e r 1982
2000 PRINT "SAVE ROUTINE",.
"ENTER PROGRAM NAME"
2010 INPUT i s
2020 SAVE Z$
2030 GO TO 10
For the purposes o f the demonstration I have assumed th a t th e
important part of the program lies
READ statements is that they allow
the p ro g ra mme r t o change t h e
between lines 200 and 1999. The
initialising routine at lines 50 to 130
asks th e user to enter the values
which simulate th e D A TA sta te ment. Those values need only b e
entered o n ce , because t h e sa ve
values of variables during execu-
routine at line 2000 saves both the
tion. For example:
10 DATA 1, 2, 3, 4, 5 ,6
20 READ A, B. C
program a n d t h e va ri a b l e s o n
cassette and then jumps back to the
beginning of the program.
Next time the program is loaded
from ca sse tte i t w i l l "c o m e i n
running" and jump back to line 10
with the values of all the variables.
in particular the values in array B.
1000 READ A. B. C
will cause A. B, C to take the values
1. 2, 3 initially and then 4, 5, 6 at line
1000. Once again, the same effect
could be achieved using LET statements and So the ZJC-B1 Basic programming ma n u a l i s c o r r e c t i n
pointing out on pages 145 and 146
that READ and DATA are more or
less superfluous Instructions.
To prevent Perry jumping on his
ZX-81. here is a method of simulating READ and DATA:
10 PRINT CALCULATE
I N I T I A OR SAVE1I,C,S)?"
20
L IINPUT
S E . Z$
30 GOTO 10 + 40*(Z$ = " I " )
+ 190*(Z$ " C " ) +
1990*(Z$ = " S " )
50 PRINT' IN ITIA L IS E " ,,ENTER
TEN SETS OF THREE
4
still intact. H e i s t hen f ree t o
transfer the values out of the array
later in his program.
In fact, once the values of B are
established, lines 50 to 130 are re
dundant and could be deleted by
entering each line number in turn in
the usual way — see my answer to
Mike Chandler l a te r f o r a mo re
interesting method. It is important,
however, not to start a program by
using RUN if you want to retain the
variables. You should use GOTO I
or some ot her appropriate l i ne
number ins tead.
John Randall of Woking, Surrey,
should note the use of GOTO instead
of RUN. He writes: " C a n y ou
suggest a programming technique
so th a t i n i ti a l s a n d a sco re a r e
continued on puge 42
1
continued from page 41
keyed-in and retained during saves
to enable a best-score system to
operate for games?"
I have been asked that kind of
question a surprising number o f
times. The answer is that so long as
you do not use RUN, NEW or CLEAR,
all y our variables a r e retained.
They are also copied on to cassette
during SAVE and copied back into
memory during LOAD.
"Deleting lines by entering their
line numbers in turn is a nuisance.
Is the r e a method f o r deleting
blocks o f line s ?" a s k s M i k e
Chandler of Glasgow.
There is, because the length in
bytes of each line is held in two locations immediately following the line
number a nd w e c a n manipulate
them to our advantage. To see the
e
_5
20
30
4-0
F
se
RIACt " A
t • Ve,s-. i ' l : t 1 S /i153-4
a
1
4
1 .e 1N U
M
I
. 0
.. P C
'R A e , ( 1 1
PR %
14I 2N1•4Is \ 5
: 1
0
;t 1e 2e0 , 16 - 1
8
0
,lF T1311V\
,aEF
0 t 0I - .'
7
rt
' --,„ 10,
93r 0;-932
(
..
'
,
,
0
0
?" - a 3
1T
c1. .‘3.t40e 2
. .O
% - -j '
rr
1
+C
T
,
1.4•0
E
6
'
t ( ' 10
e -t ,
,
0
€2.
.
l c s1F 4 A
.
0
0
'
3
w
i ., t1 ZX-81
' ‘o cA
line length, clear
1.your
0by
1
6
0
0 4
.othen
entering N EW tand
A
enter
the
1 0
2
2
7
e
,
following line:
.
10 REM
.- 2
,
Then PEEK at.Fthe
, first few bytes
9
1
in the program area
, . .which starts
% at
16509 and you will
1
r c,see:
Address Contents
4 Meaning c
16509 0
l i- n1 e number =
16510 1 0
= 10
1 256*0 + 10e
1
.
4
16511 2
line length =
16512 0
2 + 256*0 =s2
16513 2 3 4
code for REM
_
16514 1 1 8
code for
newline .
Notice tha t the line length excludes the four bytes required: for
the line number and the line length.
t
The following routine fi nds t h e
address of the first byte of two lines
entered by the user:
9000 DIM B (2)
9101 LET START = 16509
9020 PRINT "ENTER FIRST AND
42
6
LAST LINE NOS"
9030 INPUT B (1)
9040 INPUT B (2)
9050 IF B(1)< 0 OR B(2)<
OR B (1) > 9999 OR
B (2) 9999 THEN GOTO 9020
9100 FOR I = 1 TO 2
9110 LET L = PEEK (START + 2)
+ 256*PEEK (START + 3)
9120 LET LINEND = 256*PEEK
START + PEEK (START + 1)
9130 LET START = START + L + 4
9140 IF LINEND < B (I) THEN GOTO
9110
9150 LET B (1) = START —
(L + 4)*(I = 1)
9160 NEXT I
The routine finishes with the two
addresses held in B (1) and B(2). The
next trick is to fool the ZX-81 into
thinking that all the lines between
and including the two line numbers
0
:t ot P •
v'S. ‘ 0
1e t
A, • 5f5 6 '
1 0t
0i line by POKEare just one monster
/t
ing the difference between
B(2) and
B (1) less 4 into the0 slot for the line
length o f the fi r s1t line . Tha t is
—
yr _ e x c e .)
achieved by adding the lines:
9200 LET B(2) = B(2) — B(1) —4
9210 POKE B(1) + 2 . B(2) —
256*INT (B(4256)
9220 POKE B(1) + 3. INT (B/2)/256)
The monster line c a n then be
deleted in the usual way, by entering the line number alone.
Derek Chadwick o f Kingston.
Surrey, has an interesting question.
He asks: "Is there any way of liningup figures by the right? I am calculating interest amounts t o two
decimal places".
The following routine will round
to t w o decimal places t he da t a
entered at line 20 and right-justify
the figure printed at line 80. Notice
that 0.5 is added in the calculation
to round the number in line 30 be-
MN U M
M N ME I
MI 11111 • m o o r = I l b.
N
1 I 1M • 1 1 1 .
OM
I 1 1 1 1
4
1 1
▪
1I 1 0,
1
11 1111 INNIS
•U4M
M
EP1'7-L. M I N I P M M V I N
1
M i l l i " If 1
M •1.111G WINO
1
ME
1M IMMO N M I
I
S
M
MEM D M
O
a1 l 4 N M N M I
m
E i n = MN
I•l N mow NNE/
MI
• NE NE M •
• 11111No
1•
14•
11
1T
8a
0a
1cause t he I N T function a lwa y s
1rounds-down. I f the 0.5 were not
1
present, then 9.877, for example.
1
would
b e rounded-down t o 9 .8 7
1
when
it should be rounded-up t o
1
9.88.
1
1 The print position is determined
1
by converting the value of I to a
string and then calculating where
the de c im a l p o i n t oc c ur s ; i t
functions correctly even if I is an
integer and hence has no decimal
point.
10 LET lin =
20 INPUT I
30 LET I = IN T (100*I + 5)/100
40 LET ZS = STR$ I
50 IF ZS (I) = DS THEN GOTO 80
70 NEXT J
80 PRINT AT 21, 16-J; Z$
90 SCROLL
100 GOTO 20
Janet Peterson of Grove asks: "Is
it possible for a cassette tape to
wear out? I am a teacher and my
class has used a commercial cassette of games many times but I am
finding it increasingly difficult to
load."
Yes, magnetic t a p e w i l l f a i l
eventually. T h e r e a r e s e v e r a l
problems. First, simply reading a
cassette degrades the signal stored
on it by a small amount so if you
LOAD from it many times the signal
will become weak. Second. i f you
leave a cassette untouched t he
signal from each layer of tape will
print through on to the next, causing
an eventual degradation of the tape.
Finally, i f y ou a lwa y s stop t he
cassette at the same place and then
re-wind it, the tape will stretch.
My advice is always to make a
second copy of important cassettes.
If you have a commercial cassette
which you cannot copy because you
cannot break the program while it is
running. t h e n " e x e r c is e " t h e
cassette regularly by re-winding it
completely. That will help to avoid
print-through and stretch.
(Heui son Consullnifis, 1982
• Please addres s problems a n d queries t o
Andrew Hows on. Heipline. Graham Close,
Biewbury. Oxfordshire.
SI NCLAI R USER S e p t e mb e r 1982
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s wit c hed nor paged and is direc t ly addres s able. The unit is user t rans parent and ac c ept s c ommands such as
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Break down of memory areas...0-8K-Sinclair ROM. 8-16K-This area can be used t o hold mac hine code for
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These t wo packs extend and c omplet e the Memot ec h RAM range (for the t ime being! ) A not able f eat ure of the
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takes about 6.5K RAM) • I nstant inverse video ontoff gives flashi ng characters • Vi deo pages can be
super i mposed • Vi deo page access is similar to Basic pl ottunpl ot commands • Contai ns 2K EPROM monitor
wit h f ull range of graphic s s ubrout ines c ont rolled by mac hine code or USR f unc t ion
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Main Featur es — • Interfaces ZX8I and parallel printers of the Centr oni cs type • Enabl es use of a range of dal
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SINCLAIR USER September 1982
43
ZX Spectrum
LTEXT AND Z T E X T
ZX81 WORD PROCESSORS
20 Programs E6.95
l o we r c as e c h a r a c t e r s
on the ZX printer!!
The ZX Spectrum has brought advanced
computing power into your home, The
Cambridge Colour Collection, a book of
20 programs, is all you need to make it
come alive.
No experience required. Simply enter the
programs from the book or load them from tape
(E
.
Amazing
e f f e c t s . A l l p ro g ra ms a r e f u l l y
animated
using
hi-res graphics, colour and sound
2.
wherever possible.
9
Entirely original. None of these programs has
5
ever been published before.
eProven Quality. The author already has 30,000
xsatisfied purchasers of his book of ZX.81 programs.
t
Hours of entertainment
r• Lunar Landing. C ontr ol the angle of descent
aand jet thrust to steer the lunar module to a safe
)landing on the moon's surface.
a• Maze. F i n d your way out from the centre of a
nr a n d o m ma z e .
d• Android N i m . P l a y th e Spectrum a t th e
ancient game of Nim using creatures from outerrspace.
u• Biorhythms. P l o t t h e c y c l e s o f y o u r
nEmotional, Intellectual a n d Physical activity.
.Some would say this is not a game at all.
No longer ne e d y ou b e confi ned . a c e genies. be ttle ihr os a nd the like W i t h h p ,
programs y o u r ZX 8 1 be c om e s a v ia ble c om m e r c ia l m a c hine , Z T E X T !uppe r
charecters
, r , t u only I and L
TE X T
incorporate
a te s t editor and a 'formatter gaunter. The te tt &M oe allows you to type test
and
( u epditpit eT hr e tornsatter .• printer takes the te a t and sends it to be screen or ZX p r i n t,
lust
it
a dying
n
d end Inirmaltirig according to commands embedded in the le s t Inc lude d el Itcommands
lr a mop of w
e
r are such useful opeoattoos as string search. string replacement and
merge facility enabling a skeleton c loc une nt to be fi lled with variable •111011"18110n L
c
a
s
T E X tor both upper and lower case characters. N o, tha t re not a misprint. e v utninen
caters
e
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graphics feature of the ZX printer Graham Asher has busti a complete set
g I Nresolution
.
c
h case
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r
a
lower
The s e posoarri come complete with a detailed manua
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• Morse. A complete morse-code training kit.
This program will take a complete beginner to
R.A.E. proficiency.
• Maths. Ad j u sta b l e t o various levels, th i s
program is an invaluable aid to anyone trying to
improve their arithmetic.
Run your life more efficiently
• Home Acco u n ts. Ke e p i n g tra ck o f yo u r
finances w i th t h i s easy-to-use program w i l l
enable you to see at a glance where the money
goes and plan your spending more effectively.
• Telephone Address Pad. Ins ta nt access to
many pages of information.
• Calendar. D i sp l a ys a 3 month calendar past
or future, ideal f o r planning o r tracing p a st
events.
ZX81 Assembled
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E69.95
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Wide range of books, software
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1111111•••11111•1
I I I • • • • • • •
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ORDER FORM:
Send Cheque or P.O. wit h order t o: Dept. D., Richard Francis Altwasser, 22 Foxhollow, Bar Hill.
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Please send me
O Copies Cambridge Colour Collection Book only E6.95 each.
O Copies Cambridge Colour Collection Book Et Cassette
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CambridgeComputerStore
Name:
Address:
1 Emmanuel Street, Ca mbridge C8 1 1 NE
Phone (0223) 358264/65334
Also A c o rn A t om • VIC-20 • Tandy TRS-80
44
S
I
N
C
L
A
I
R
USER S e p t e mb e r 1982
7
Pac-man hits the
Sinclair scene
PAC-MAN, t h e colourful
chomping video game from
the U . S . . h a s h i t t h e
Sinclair s c e n e w i t h a
vengeance. N o t co n te n t
with having a book a n d
even a hit record about it,
no f e w e r t h a n t h r e e
co mp a n i e s h a v e d e veloped versions f o r th e
16K LX-81.
The DJL Software Zuckman i s w ri tte n i n 10K o f
machine code and has all
the addictive features o f
the original within the limitations posed by the ZX-81
character set. You are the
gobble-man ( " 0 " ) b e i n g
chased b y th e ghosts —
inverse commas — as you
make your way round the
29x21 ma ze , e a ti n g t h e
dots in your path.
One o f the reasons fo r
the enormous popul ari ty
of Pac-man is the w a y he
hunter can be eaten by the
game; i f you eat one of the
fo u r c o r n e r " e n e r g y
posts", the ghosts change
their appearance and you
can then chase them and
win a bonus i f you catch
them.
You have to be careful,
as, a fte r a fe w seconds,
they r e v e r t t o th e i r o l d
nasty selves.
DM made a n unusual
ch o i ce o f k e y s f o r
movement — Q and P fo r
left and right, M and X for
up and down — b u t th e
kn a ck c a n s o o n b e
acquired. Zuckman costs
E5.95 from DX Software, 9
Tweed Close, Sw i n d o n ,
Wiltshire.
In the Babtech Zedman,
you are a mouse in a 19x19
maze; the standard cursor
SINCLAIR USER S e p t e mb e r 1982
controls a r e u s e d f o r
movement. The four ghosts
move f r o m t h e c e n tr a l
area one after another and
roam the maze in search of
their p r e y . E a ti n g t h e
dollar signs in the corners
makes the ghosts edible for
a short time but Babtech
w a rn s t h a t t h e y a r e
slippery c r e a tu r e s a n d
may pass you if you rush at
them.
You have three lives but
if you fi n d i t all too easy
you h a ve 1 0 ski l l levels
arcade games f o r E5.95.
Babtech is a t 3. Bakerton
Mains V i e w . Edinburgh,
EH14 3BR.
The third Pac-man lookalike i s t h e A b e r s o f t
Mazeman, which also uses
the standard cursor controls, this time on a 30x20
maze. Once the mazeman
starts moving he continues
until he hits a wall or you
change his direction. The
ghosts have fo u r possible
shapes; A means i t i s i ts
own n o r m a l unpleasant
and d a n g e r o u s s e l f ,
moving ra n d o ml y r o u n d
the maze: B means yo u
have e a t e n a c o r n e r
"power capsule" and the
ghosts a r e vu l n e ra b l e ;
inverse B means they are
about to turn nasty again.
Wri tte n i n 5 K o f
machine code, th e game
also p ro vi d e s a n e x t r a
mazeman i f y o u s c o r e
10,000 points. Mazeman
costs E4.45 from Abersoft,
7 Ma e sa fa l l e n , B o w
Street. Dyfed, SY24 5BA.
from w h i ch to choose to
keep you on your toes.
The 4 K machine code
Zedman i s complete w i th
Spacers, an invaders-type
program, g i v i n g t w o
Playing at business
IF YOU FANCY yourself as
a financial whizz-kid, test
your skills w i th tw o new
business games from CCS.
Airline has good animated
bar charts and histograms
and is fu l l o f unexpected
hazards.
We were hi-jacked by the
PLO but managed to make
a p ro fi t a t the end o f the
fi rst year. In the next year,
however, we overspent on
sta ff a n d f a c e d t h e
prospect o f r e s i g n i n g .
There are some pertinent
decisions to be made and
the game provides a useful
i n tro d u cti o n t o t h e
business w o r l d a n d i t s
terminology. T h e a i m o f
Airline i s t o ta ke -o ve r
British Airways as soon as
possible.
In Au to ch e f, i t i s t o
buy Trusthouse Fo rte b y
the judicious management
of a chain o f restaurants
and f a s t f o o d o u tl e ts .
There are three levels o f
difficulty, although e ve n
on the easy level we lost a
fair amount of money, and
it helps to have a pen and
some paper to keep tra ck
of cost forecasts, rent, and
other vital factors.
The games co st E4.75
each, a n d a r e available
from C C S, 1 4 L a n g to n
Way, London SE3 711.
• • • • • • • • • • Wp o o r-
-.••••••••
-r
4
Pixel makes
use of space
TWO INTERESTING new
space games, both in 16K,
are f r o m Pi xe l Pro d u ctions. In Subspace Striker,
you are the captain of the
Swordfish, which lurks in
h yp e rsp a ce s h o o t i n g down enemy vessels w i th
its deadly Antimat torpedoes. A f a i r l y fa m i l i a r
theme is enlivened by some
splendid graphics o f th e
various spaceships a n d
excitement is added by the
capacity o f the Swordfish
to su rfa ce a n d d i v e t o
avoid enemy fire.
An especially good destruction sequence c o m pensates f o r t h e m i s continued on page 46
5
continued from page 45
fortune o f s uffe r ing a
direct hit. The instructions
are a little confusing a t
first but stay wit h it. I t
costs E5.50 for the ZX-81
version.
There a r e outstanding
graphics i n Trader, too,
many of them animated,
and t h e s t or y l i n e i s
original and entertaining.
You are a n inter-galactic
trader trying t o make a
profit on your wares while
escaping a variety of pitfalls on your journey from
moon to moon.
You will need to do some
quick thinking and it helps
to have pe n a nd paper
handy to keep tabs on your
stocks. We made a killing
on Synthomunch, a yukky
kind of staple food popular
in the Meridien area, but
ZX81
cannot guarantee i t will
work for you.
The game is i n three
parts, so that it is in effect
a 48K saga, with plenty to
keep you absorbed to the
end. The complete thing
costs E10.50. Both games
are available from Pixel
Productions, 3 9 R iple y
Gardens, London S W1 4
BHP.
Adventurous
Synacroop
SYNACROOP S of t wa r e
has produced a cassette of
four games, all in 16K. Two
are s hor t a n d s im ple .
There i s a two-pla y e r
gambling game, Up against
the w a l l , a n d a
straightforward shoot-out
with a l i e n s pa c e c r a ft
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oxygen r u n s o u t i s
pr oble m a tic b u t n o t
impossible.
The other adventure is
Curse of the Aztec tomb,
based mainly on graphics,
depicting fiendish dangers
such a s falling boulders
and bridges which close as
you are about to jump on to
them. You will need nimble
fingers on the control keys
and perhaps a practice
game or two to earn a high
score. The cassette costs
E4.95 and is available from
Synacroop Software, 6 3
Cedar A v e nue , Cosely,
West Midlands.
called Revenge o f the
flying saucers.
Each side also features
a m o r e s ophis t ic a t e d
adventure, one of which is
called Escape f r om t h e
Pyramid o f Mars. There
the aim is to collect four
keys from the depths of the
pyramid wit hout be ing
annihilated by a mysterious fl a s hing de f e nc e
mechanism. The graphics
HEWSON CONSULTANTS Z X SPECTRUM
HINTS A N D T I P S F O R T H E
ZXEil by Andrew Hewson £ 3 . 9 5
48+8K N E W
are lively and because the
hazard is a random one.
the suspense builds-up.
especially when safety is
in sight.
E79.00
Z80 O P CODES
C 1 _ 4 5
A r n o . • l o t I h 0 . , w o r , n • I A n d i n s • . p . r no nue d p . u 9 r w fl m . r
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•• B e a t t e e b e l l K m . O o d . t •
PROGRAMMERS £ 6 . 5 0
TOOLKIT 2 X 8 1
PILOT *
ZX81 E 5 . 9 5
o
o
PUCKMAN N EW ZX81 E5.95
• 541100 c p . p e K • a t . . .
,• w
a aw
d o c • S t . . W a d Na l
l e eO x
• boa
• ,
• d
20 BEST PROGRAMS FOR
THE ZX SPECTRUM £ 7 . 9 5
BY AN D R EW H EWSON
• Ha ve tun with your Spectnom
• F u ll length programs
• Learn by esampla
• Full colour graphics
progfarns lit the 16K mac- lane owlet:07o-
Index File Music Sketch Duckstroot Cromer( -
U
s
L e
C o n
Machine code editor
neoble tiling program tot your
address book, he r* account etc
Write your own Wren, save them
bond them. alter therm end otirr
them
e
your computer as a chewing
tablet
a r n how to disrepute* tho
attributes file and have I n tool
v e c t pictures to • digital Mem
and M e e thorn
- Write , alter and load trio code,
name routines and ca t them by
name, rowel and delete machme
code
SPACE INTRUDERS FOR THE
ZX SPECTRUM
Features m de de
Full sound and colour ACUOI)
3 laser bates, 4 defences
M C super fast achon
High score display descending aliens, e4 ',bent in each
squadron
Squadron after squadron attack your position
ALL THIS YOURS FOR ONLY E 5 . 9 5
Cheque with owlet or quote ACC1101 or Barclaycard numbei
to H EWSON CONSULTANTS, Dept SU BOA St M a rys
Street_ WalInglord, Oxon OXIBBEL
E
C
M
9
SINCLAER USER September 1982
sinclair user
club
Honorary club member served on HMS Hermes
during the conflict in the South Atlantic.
DC-81 sails to Falkland Islands
DURING t h e Fa lk la nds
crisis we received many
programs simulating some
of the events in the South
Atlantic. We have decided,
however, to print only one
special submission.
The listing overleaf was
produced by a sailor on
HMS Hermes while he was
on active service with the
Task Force.
In recognition of his part
in the action we have decided to make Chief Petty
Officer Tr e v or Wa lhe n,
36, an honorary member of ZX-81 with him to provide
the Sinclair User Club. He relaxation from the strain
received the news when he of the conflict — "I used to
returned t o Britain wit h work during the night from
Hermes towards the end of 8pm to Sam and when I
July. " It was marvellous." came of f I would spend
he said, "It made my home- about two hours at a time
with the ZX-81."
coming even better,"
He has ha d his ZX-81
He adds tha t h e ha d
since Ma r c h a nd ha d a ordered a 16K RAM pack
Z X -80 p r e v i o u s l y . from Sinc la ir Research
Although h e is a n elec- but as it had not arrived,
tronics engineer i n t he he used to borrow one from
Royal Navy, in which he a colleague, who also had
has served for 20 years, he his ZX-81 on board.
did not start taking a deep
He sent his fi rst pr ointerest in computers until gram to Sinclair User in
he saw a colleague with a May but while he was in
ZX-80.
the S out h A t la nt ic h e
" I r e a d a bout t he m improved it twice before
when they were first on he submitted t h e fi n a l
sale but I was not really version, which is printed
interested until I saw one here a n d t i t l e d H M S
and saw what it was cap- Hermes. I t takes 5 K o f
able o f doing," Wa lhe n memory.
"Because of its topicakeyboard, is also available says.
When the Task Force lity. gr e a t interest wa s
in this exclusive offer to
members. T h e nor m a l moved south, he took his
continued on page 48
price is E26.50 but members c a n obta in i t f o r
E23.85.
The other pa r t of our
offer involves the range of
software f r o m C a r ne ll
I wish to join the Sinclair User Club and enclose
Software. Members c a n
my subscription of E12
save 2 5 percent o f the
normal price of the three
Name
cassettes sold by Carnal!.
That reduces the cost of
Address
the Volc a nic D unge on/
Hangman fr om E4.50 t o
E3.40 and Alien Intruder
and Wumpus Adventure
from E5 to E3.75. All prices
include VAT.
Which computer do you own?
As us ua l, t o pe r m it
members t o t a k e
ZX-81 U S p e c t r u m E
advantage of these offers,
Send y our coupons t o Sinclair User C lub,
you can include an order
ECC Publications, 30-31 Islington Green. London
with y o u r membership
N i 813j. Cheques should be made payable to
application. A f or m i s
Sinclair User Club,
printed below.
25pc off Kempston
Spectrum add-on
CONTINUING t he policy
we began last month, we
are again making two exclusive offers to members
of the Sinclair User Club.
This m onth i t involves
C a m e l! S o f w a r e a n d
Kempston Electronics.
To link with the start of
our ne w Spectrum User
section we are offering a
discount of 10 percent off
the add-ones developed by
Kempston f o r t h e n e w
machine. They include the
24-line user I/O port which
allows you to have 24 individually-controlled lines.
Normally i t costs E16.50
but c lub members c a n
obta in i t f o r E 1 4 . 9 0
including VAT.
Two items which have
been produced for the time
when t he Microdrive i s
ready towards the end of
the year a r e also being
offered. A Z X motherboard w h i c h nor m a lly
costs E16.95 is available
for E15.25 and a ZX stackable connector, costing
E5.50, will cost members
E4.95.
Kempston's other major
product, its 41-key click
SINCLAIR USER September 1982
MEMBERSHIP 1
FORM
4
7
c onanuedf rompage47
shown by other members
of the crew and i t helped
ease the tension," he says.
Now he is home. Walhen
is looking fo r w a r d t o a
little relaxation and considering w h i ch computer
to buy next.
In t h e g a m e , a n
A r g e n ti n i a n S u p e r
Etendard aircraft is fi ring
at Hermes, which is fi ring
back. T h e a i r c r a f t i s
armed w i t h Exocet mi ssiles and bombs, which are
re l e a se d a t r a n d o m .
Hermes h a s fo u r Seacat
missiles, w h i ch a r e a l so
fired at randeom.
The c a r r i e r ' s o t h e r
defence is its chaff device
for decoying th e Exocet.
That i s controlled b y the
player, w h o m u s t p re ss
INKEY$ C a s soon a s i t
a p p e a rs b e l o w t h e
aircraft. Th e player also
controls the movement o f
Hermes b y th e 5 a n d 8
keys.
To win, the player has to
knock o u t 1 0 a i r c r a f t
which can win by sinking
the Hermes. That needs a
score o f 12. which can be
achieved b y r e c e i v i n g CPU Trev or Wit then as he crosses the equator on his way south.
three fo r every Exocet hit Due to lack of space we have not been able to print our
and tw o fo r every bomb usual lis t o f us e r groups. W e apologise f o r this
hit. Hermes i s also being omission and will attempt to include it in October.
attacked by a submarine.
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R
USER S e p t e mb e r 1982
.
THE PROFESSIONAL ONE
ZX81 THERMALPRINTER
The Computer Printer high speed matrix printer combines
contemporary printer mechanism design with advanced
microprocessor based VLS I control electronics
and distinctive functional styling.
• Professional high performance
40 column line printer.
• Attractively styled durable
housing.
• Tot a l interfacing.
• Quie t operation.
• Graphics capability standard.
• Uses Olivetti dot matrix thermal
print mechanism.
• L o w cost thermal paper supply.
• Pr ic e includes ZX interface and one roll of paper.
.29450
inclusive o f ZX interface and one ro ll o f paper.
Please add f 16.47 to cover postage, packing and
VAT (total E110,97)•
Please allow ma ximu m of 28 days fo r delivery.
ARE3S177
7MAESAFALLEN,BOW ST, DYFED.SY245BA
ZX81 & Spectrum
Games
Now NEW LOW prices!!!!
PROGRAM
O L D
N E W 81 SPECTRUM
Chess 1.4 1 0 . 0 0 8 . 9 5
10 levels rn•c
Adventure
8 10,00
9
5
9
140
locations
eased
o
n
the
originai
(At r10.00 well worth the money
Sinclair User Issue 2 review)
Invaders 5 , 0 0
4 45
Fast m c arcade action
Mazeman 5 , 0 0
4 . 4 5
All the features o f the original
arcade version rri•c
All prices are inclusive
Return o f post service
S A L E
95
It Sr I
P E RS o NA L S O r i v i R R E S E RV I CE S 1 1 ? O U V E R S T R , ; ,
161(S F T WA E
s p ac e 5100NRE
o n ly
4 . 9 5
'requires 48k Spectrum
d e
DEANELECTRONICS LIMITED
Glendale Park Fernbank Road A sco t Berkshire England
C
Telephone 0344 885661
T e l e x
849242
O
M
PSS
P
U
T
AS PART
E OF OUR CONTINUING POLICY OF U N BEATABLE VALU E FOR
M ONEY W E AR E OFFERING FOR THI S M ONTH ONLY OUR R AN GE OF
PROGRAM S I N PAC KAGE FORM AT UNBELI EVABLE PRICES
R
Includes PUCK
P PACK* MAN
I*STAR
lePROGRAMMERSPACK11
"Ind MAZE
ZX COMPILER end N H AN C ED BASIC
DRAG RACER, the se ere the best arcade
R
The compeer ha s helped ma ny people
garnes availabse
and are written tn superwrite rn MACHINE CODE - ENHANCED
fast machine code to grve unbelievablv
BASIC la ke s the strain out of programgood results - absdliantpackagra - hoghes
I
ming So m e of rts many features erscludis
recommended
£
4
. 1
6
auto renumberong, b lo ck deletion e t c
14.15
N
r'SPACE
PACK*I All t h e be st
T
lePROGRAMMERSPACK 21
in o n e p a cka g e - in clu d e s SPAC E
DEFENDER, S T AR T R EK. ALI EN a n d
WOROFIX e n d G R A M A comple te
• te xt manipulation twe e t Eise n
TAI LGUNNER
E A m a z i n g va lu e d r image
URI for those who need comp* . images Or
te*rE in their programs
f
t
%
R
Includes
excellent
['GAMES PACK 21 STOCKS
I*GAM
DESPACK'I Anselectson
of
Et SHARES. BREAKOUT (M . C). D AY AT
games including GRAND PRIX, NIGHTTHE PACES, PONTOON a nd TOWERS
MARE PARK,
I SUPER-BREAKOUT IM
OF H AN OI Qu a lity programs a t o a rs
and HIGH RISE I M .C I f 4 , 1 5
price
£
4
.
1
6
V
PERSONAL SOFTWARE SERVICES, 112 OLIVER STREET, COVENTRY CVS 5FE
I
These packeges C r. a ll aveilable a t (4.96 each. EC % for two or ES SO for three Al l
prices C r. inclusive of VAT end carriage by re turn of poet.
S
Send cheque/PO to. PSI , 112 Olive r Street. Co...entry CV6
0 SEE , send two le t class
stamps
psIforori p y of our fully detailed catalogue
'STOP PRIESS• N O W AVAI L ABL E • C I S A V E • T H E H AR D WAR E- SOFTWARE
COM BI
NATI ON PAC KAGE TH AT LETS YOU L OAD AN D SAVE A FULL 16K I N
O
ONLY 26 SECONDS FOR LESS TH AN 120.00 S AE FOR DETAI LS
N
E
t
%
4'4
Now! For the SPECTRUM UK!
P e g i M i t i k ILL
EDUCAT IONAL C O M P U T I N G
1
or, the
Soil
children
ages 5
11
ego
COitechot
otters
i
so much
for so hide
Ault
Hero a t M E A l o t o l ottogr a r nm os t o W e n y o u r
S l i d e , t r a i l m k t a p o • r k tfu l ook ,c oh0 0 0 t t o o t
A n d , 0 1 0 d o n ' t e v e n n e e d t o krwi De
, d
Thom
O r o c l o o t i n s tr i o c o o n s A A O p l e n t y
,1 odyteo
O r t l i b M c n e l ,
for
FRO
a
m
MCEIREMBIE ,17/5EATIPIRMI.
IM It i: E P A IIN A ILTE r a .v - v e m
10111:11Mr=
e
I I I I M I Eu r a r d i t i v a m m r e m i a r i m
_ . _A I,MR
oiLT
s
-
0 1, a te e ndte totor nino S tr om e ' tr te tr ig U011 a c lia c ov illy
D o
Includes
s i o
TORTOISE
n o
0
A simplif sed
All p r o g r a m m e s
t
version of the
lit fl<
o
famous Tur tl e
p
Creative use- of
p ro g ra m m e
o
g ra o llI C S
'
COOED MISSILE
,
Com bines t he
M a n y in n o va t ive
e
fun of ar cade
ideas
r
games w i t h
n
Fully documented
e
le a rn in g
d
I n c lu d e s m a n y
r
a
games
md p 8 p
t
Greon-olotter • liestogran • aSimon-speli• S k t , I
p
Set.es
,
e
q
I •uuiazi da Upstairs.
Angles
•
Downstairs
T i m oe s• Music-notes
- r a b l e• Sef U M • W•pe-out •Seell
c
•Temperature • Clock
S
• eMoney
t S Snake
s
t
X
Mastelmied
Number ouoii • + 25 more E D U C A R E
Y
c
o
—
c o
Z se i
SPECTRUM
TAS80
viD t o GENIE
W
I Z
= EI •E1 T1 1
1 1T .,• N M E M P F I N i r n t i r i U M M I A M I n i
•
••
—
•"
TE-1M FOR V I CH MA T C H
t
P*
1 1* PI
is l l l l l l l l l 11111111 l l l l l l l rrisi
1111117
Z This
I 111
M N OT
M a me
I re simulation_ rhos i• e n e xciting and highly e nioyible game in
which you p la y the pa rt Ot a Footba ll M a na ge r coping * nth I n s penelems a nd
U 'NM
16140111
I M
involve
I d in n a m in g yo u r clu b T h e re a t e s o m a n y te a time s i t i s
to list the m here but include d are town hop te a ms N OR M ALLY Wink
N impossible
t
o
t
t
pisni-killings, wage bills 10 pay, and you can eyen be sacked! II a a game
i requiring
t
a gre a t de a l o t skill, a nd pe ople pla y I I tot lite ra lly hours on me t lore
P R O O F lk
w have
WE GU AR AN T EE th a t t h is i s one o l t h e b e st com pute r p if fl e s yo u 've e ve r
e pla y e d
E. this ga me is e xtre me ly a ddictive '
al l l ,Bl lUTi lBEWAR
lllll
I
l
to
=
mud,
,
pukidlit Jo 4 1 0 1 )K I ' M C AW %
£4.95 only
S
I
N
C
IMME.
1M.
MO.
Spectrum
T A S 8
ABK RAM
V I d O 0
0
/
f ° o p t . S t.
mr.
N O X 178
i ONNlat
v,
Aftl.
TON N I W A N PVE
r
P
IR fRAO %
N T A U (
i
O
,. W P L . '
e
flr R
GM *
Z X81 L E V E L
16K S
RAM
1 5 1 (
RAM
1 HAttiMARE
REQUIRED
,
.
'
n
i
l
I
i
r
.
t
P
U
t
?
Make sure you
What is the best way to guarantee that you
never become bored with your Sinclair
computer?
The answer is to subscribe to Sinclair User,
written specifically for owners of ZX-80s,
ZX-81s and Spectrums. Sinclair User is the
latest montly from ECC Publications —
pioneers of Practical Computing, WHICH
COMPUTER?, and Computer & Video
Games, Whether you bought your system
yesterday or are an old hand, you are probably
an enthusiast for your machine ad your biggest
problem is likely to be obtaining all the
information to satisfy your interest. Sinclair
User is devoted to quenching your thirst for
information,
As the name suggests, the content is geared
specifically to helping you, the user. There are
pages of information on available hardware
and software. Our aim is to make Sinclair
User invaluable and we chronicle applications
which are of special interest,
50
ifsarricg
tthiorml
MM.
e n c l o s e c he que pos ta l or der f or f
o1 E
r DUCARE T
1139a Sl oane S P
t Nam e
d i
.
1
nI a S WI X 9AY li 'Addr ess
L
e
t e
a v i m . • r m ui
so
Let
s
•n
e
Cd
s
oo
e
un
n
n
d
t
m
•
e
E
i
q
_
u
u
a
p
t
i
i
t
o
b
n
E
s
d
•
u
A
L
r
o
e
r
a
a
s
h
•
5
G
7
u
1
e
s
s
a
V
o
l
u
r
n
e
User
,
g
e
t
i
t
e
a
c
.714dictive
A
GREAT
GAME
of 1
isaratedile
L
Can you continue to obtain the most from
your Sinclair without reading Sinclair User
every month? So why not fill the subscription
order form t oday ? Send it to Sinclair User,
ECC Publications, 30-31 Islington Green,
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1
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USER September 1982
•
Win a ZX-99
by filling
the screen
Our competitions have proved so popular that we are to continue them,
despite having awarded the last of our printers in last month's contest,
the winner of which will be announced next month.
We have decided to continue our policy of offering major prizes and
this month we will be giving the winner a ZX-99 tape control system for
the ZX-81.
This month our competition is based on an idea from a reader, Tony
Poulter, of Meopham, Kent. The aim is to write a program for the 1K
ZX-81 which will display a full screen of 748 characters. As that is
regarded as impossible, it may be necessary to award the prize to the
person who manages to achieve the greatest number of characters. We
shall be looking also for the most elegant and flexible solution.
As a tie-break, should one be necessary, we want you to write a slogan
beginning with the words: "I would like a Spectrum because. • ."
Entries should reach us by September 13.
The usual rules about the editor's decision being final and employees of
ECC Publications being ineligible apply.
WOO dIMIN EW
f ORM
wo n l o w p a s o n o m o o m o o 1 1 1 .1 WI M P I n g e O N O IM M O
•ffia 0
01
—
—
—
.
.
.
.
.. .
1 . 1
.
.
1 1
1 .
O
N
IMPS ONO o we yams snob wo e i
I
1
ed as a tie-breale I would I
I
r
s slogan, which will be us. .. . . . . . . . . . . . . . • • . . . . . ..
. 1I
I comp
..... •••.•
......
i
ilII l i k e a Spectrum because ..
.e1 N a m e . . . . . . . . . . . . . . . • . . . . . . . . . . . . • . • • . . . . . . . . . . . .
.............. •. ................. I
t1I
. . . . . . . . . . ...
I
O
eA
d1 . . . . . . . . . . . . P u b l i c a
.t dthI i loSend your entries to ECG n I s , 30-31 Islington Green, 1
re1 L o n d o n NI.8B1 to arrive not later than S 1 3 .
- ep t e m b e r
Ess
SI NCLAI R
I L
o
w
t
o
n
USER
o September
w
1982
51
SPECTRUM
C.INE LL
3 2 K R A M . Upgr ade your 16K Spec trum to
full 48K. Easy to fi t. No soldering needed. Full
instructions supplied.
(S32)
£
3
9
.
9
5
ZX81
Uniquely expandable to 32K by the addition of our
16K Expansion Module.
£25. 00
Basicl6K RAM Pack (8116)
1'19. 95
16K Expansion Module (8116E)
£3.9. 95
Full 32K RAM Pack (8132)
All pric es f ully inc lus iv e of V A T and P&P.
Send now to:
STONECHIP ELECTRONICS
UNIT 4, HOSKINS PLACE,
WATCH ETTS ROAD,
CAMBERLEY, SURREY.
Tel: (0276) 681131
ZX SPECTRUM CITY
Within a few weeks of getting out first 7...X
version
of "MONOPOLY". We did not think it would sell so we
scrapped
81 w e it . h Wae hav
d e been
a k ic k ing o n e anot her ev er since!
However,
it
was
developed
in parallel to a mainframe game called
g o o d
"CI TY" which was an enhanced version of "MONOPOLY" played
w o r k i n g
on a street map of London rather than the standard board. The
street map took up a few hundred kilobytes and thus was not easily
put into the ZX-81. The basic mechanics of the game are available
for the ZX-81 but the game is played on a blank map. The streets are
constructed wit h the buildings. Now, along came the SPECTRUM
with 48K of RAM and in went the street map, not London but an
imaginary t own. The colour facilities made the program simpler
than the mainframe version because much more information can be
displayed to the player on one screen. In the end 'CI TY" is not at all
like the game that inspired it. Everyone that we have invited to test it
says that it is much better!
16K ZX-81 CI TY E6. 4 8 K ZX SPECTRUM CI TY 18
ZX ASSOCIATIVE
DATABASE SYSTEM
Ma ke cheques o r P.O's payable to STONECHIP LTD.
S 8 1 C
A variable format database in which nothing need to p r e
adapts
to your needs as you use it. Conventional searches, sorts,
updates,
d e fi n e merges,
d.
I ett c , bec ome a t hing o f t he past. Our local
"EXPERTS SYSTEMS" expert is quite worried about it.
8116E 0 8132
ENCLOSE E
16K ZX 81 ADBS f9.
NAME
ADDRESS
1 6 or 48K ZX SPECTRUM A DB S 114
DOCIMODUS
1
ALLOW 28 DAYS DELIVERY
S
E
The abov e aim als o av ailable F l u F
,
F I R M i C R O S 4 - 4 0 r
,
S
T R
F A
T H
A
l
v
i
C
O
N
E
:
I
O
N
r-
16K Expandable RAM.
52
R
Al W U M P U S ADVENTURE FOR 1 TO 4 PLAYERS. Seek the famous
creature in the mos t dangerous Wurrtpus hunt ever. A ll the usual
features are there:
SUPERBATS * P I TS * TREMO RS * S W A MP S * MA G I C ARROWS
PLUS Exciting new features EVIL GOBLINS that will try to sacrifice you
to the Wumpus.
* G I A NT SERPENTS * WUMPUS MUCK * MAGIC SPRINGS *
FULL 164( PROGRAM * * RA NDO M Et PRESET CAVE p A rrE n Ns
* * Y O U CONTROL THE LEVEL OF DIFFICULTY * GREAT FUN
FOR YOU AND YOUR FRIENDS *
BI MO V I E MOGUL: Guide your fi lm through the often hilarious traumas of
production. Us e your budget wisely and you may make a fortune
Success depends on many factors end not iust luck.
FULL 16K PROGRAM * * *
ORDERS: Plus SOp PEW or large S.A.E. for lis t to:
-CARNELL SOFTWARE
4 STAUNTO N ROAD, SLOUGH. BEAKS. SL2 1NT
Use your ZX81 Rampacks and other ZX81 units on
your new Spectrum in addition to your Spectrum
add-ons.
1'15.00
(S81C)
0
A
C4: WUMP US ADVENTURE/ MOVIE MOGUL M O O
Spectrum Z X 8 1
Converter.
S S U
W
Al A L I E N INTRUDER: You awaken to find you are the only survivor on the
Explorer Class 3 Starship Can you escape before you also fall victim to
the Alien monstrosity that devoured the crew? There are many wave to
end this adventure but only one way to survive!
FULL 16K PROGRAM * *INTERACTIVE GRAPHICS
* SAVE GAME ROUTINE a
8) HEIROGLYPH1CS: Decode
the ancient 39 symbol alphabet in time to
u.
save the famous explorer, "Wullie M a k e r from a sandy grave.
FULL 16K PROGRAM * * A NI MA TE D GRAPHIC DISPLAY
* RANDOM CODE *
E22, 50
0 8116
T
C3: ALI EN I NTRUDER/ HI EROGLYPHI CS £ 5 . 0 0
Add on unit for your Spectrum. Amplifi es the sound
output. Separate tone and volume controls.
Eliminates hum loops when saving to tape.
Eliminates plug swapping when loading or saving
programs on cassette. No extra power supply
PLEASE SEND ME 0 S 3 2
F
A) V O LCA NI C DUNGEON. Rescue if you can the Ellin Princess. Mythical
monsters, pits, fiery caverns, diminishing strength and water make your
quest anything but easy.
FULL 16K PROGRAM * * S A V E GAME ROUTINE
* SINGLE KEY ENTRY *
"Volcanic Dungeon is terrifi c value and I would recommend it to
anyone"
M
r
s
Thomas Cornwall
BI HA NG MA N: Delux version o f t he classic game. Play against an
opponent or the computer's 400 word vocabulary. Good graphics.
Sound Amplifier and Tape
Switching Unit •
required.
(S S W
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ZX81 A DV E NTURE SPECI ALI STS
C2: VOLCANI C DUNG E O N/ HA NG MA N ( 4 , 5 6
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161 Walmers ley Road, Bury . Lanc as hire BI 9 5DE.
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Philip Joy considers a pair of old mind
games, anagram and crossword, a n d
finds them diffi cult f o r computers.
Good use of screen
by rare word games
details a b o u t t w o th i n g s, a
I Hreview
A V E ofd e
c i dprograms,
e d t o i n cwhich
lude
two
are old mind games, Anagram and
Crossword. T h e second th i n g i s
adventure games, on which I have
received so me v e r y i n te re sti n g
comments.
First. Anagram and Crossword,
both on one cassette and sent fo r
review. I t i s o b ta i n a b l e f r o m
Warren Newman, 3 Thalia Close.
Greenwich. SE10 9 N A. Th e ta p e
arrived w i th a b r i e f description
about both games.
Crossword was diffi cult to load.
with the volume level critical. b u t
that i s common and i s something
ZX-81 o w n e rs expect. Newman's
letter says: " I t is, so fa r a s I a m
aware, the fi rst electronic version
of a crossword puzzle".
I am not sure about i t being the
first but they are not very common.
One reason is that they can be done
only once; apart from changing the
clues and answers, nothing else can
be done when you finish it. You need
someone else to make up and type
the crossword. otherwise you w i l l
know th e answers. Fo r th e same
reason you must not list the program
or the answers will be shown and
the puzzle ruined.
SINCLAIR USER September 1982
It has a fast response time, using
the fast mode of the ZX-81, and uses
the screen well. One point is th a t
there i s a n option t o display th e
crossword. I f you did that, surely
the whole puzzle would be ruined?
The cl u e s a r e re l a te d t o ZX-81
computer terms and so will appeal
to enthusiasts.
On the B side of the tape. Newman
money and i f you like that kind o f
puzzle, you will like these programs.
My thanks also to Leo Amatino, who
looked a t these games a n d gave
unbiased remarks.
I would like to mention another
game I r e c e i v e d o n t a p e . a n
"unbeatable" version o f multiplepile Nim. I say unbeatable in quotes.
because no-one I have asked to play
it has beaten it, including me. It has
won some games and drawn some.
but h a s n o t b e e n b e a te n — a
remarkable achievement.
With some o f th e rubbish programs on the market for the ZX-81.
this program. I think, should be sold.
but the sender has no plans to do so,
so far as I know.
My favourite type of mind game is
the adventure type, a game which is
a to ta l mind game like chess, b u t
with more fun and general appeal.
Adventures are the type of game in
which you are projected into some
castle/forest and you have to solve
some problem. like finding the longlost treasure.
Al o n g t h e w a y t h e r e a r e
numerous problems and each has an
e x c e p ti o n a l s o l u t i o n . M o s t
microcomputer a d ve n tu re s h a v e
completion times of around a month.
The idea is derived from the large
mainframe computers, where large
'Crosswords can be done only once; apart
from changing the clues and answers,
nothing else can be done.'
says t h a t a sta n d a rd g a m e o f
Anagram i s o ffe r e d w i t h t h r e e
levels o f play. Again, though, th e
game was diffi cult to load, but once
in you can make a back-up for your
day-to-day use. One thing about this
type o f game i s th a t i t becomes
uninteresting a fte r playing ma n y
games. Again, as in Crossword, the
screen i s well-used; not a l l games
make good use o f th e screen b u t
these two certainly do.
My t h a n k s t o N e w m a n f o r
supplying the cassette fo r review.
The cost is E4.95 and you will need
16K I think it is reasonable value for
5
disc packs a r e used to store the
game and your progress. It is a fact
that some computer centres stopped
work while the workers tr ied t o
finish a problem.
Of course, th e ones o n microcomputers like the ZX-81 are not so
complicated, but just as much fun to
play, and there are many for the 16K
ZX-81. They often produce much
frustration b u t t he r e i s gr e a t
satisfaction when a month of work
produces a result.
Please s e nd de ta ils o f M i n d
Games to Philip Joy. 130 Rush Green
Road. Romford, Essex, RM7 0C2A.
3
NewlX811 Software
from Sinclair.
A whole new range of software for
the Sinclair ZX81 Personal Computer
is now available - direct from Sinclair
Produced by ICL and Psion, these
really excellent cassettes cover
games, education, and business/
household management.
Some of the more elaborate programs can only be run on a ZX81
augmented by the ZX 16K RAM pack.
(The description of each cassette
makes it clear what hardware is
required.) The RAM pack provides 16times more memory in one complete
module, and simply plugs into the rear
of a ZX81. And the price has just been
dramatically reduced to only E29.95.
The Sinclair ZX Printer offer full
alphanumerics and highly-sophisticated
graphics. A special feature is COPY
which prints out exactly what is on the
whole TV screen without the need for
further instructions_ So now you can
print out your results for a permanent
record. The ZX Printer plugs into the
rear of your ZXB1, and you can
connect a RAM pack as well_
Games
Cassette Gl: Super Programs 1 (ICL)
Hardware required - ZX81.
Price - E4.95.
Programs - Invasion from Jupiter
S
. kittles. Magic Square. Doodle. Kim.
Liquid Capacity.
Description - Five games programs
plus easy conversion between pints/
gallons and litres.
Cassette G2: Super Programs 2 (ICI)
Hardware required - ZX81.
Price - E4.95.
Programs - Rings around Saturn.
Secret Code. Mindboggling. Silhouette
Memory Test. Metric conversion.
Description - Five games plus easy
conversion between inches/feet/yards
and centimetres/metres.
Cassette G3: Super Programs 3 (ICL)
Hardware required - ZX81.
Price - L4,95.
Programs - Train Race. Challenge.
Secret Message. Mind that Meteor.
Character Doodle. Currency Conversion.
Description - Fives games plus currency
conversion at will - for example,
dollars to pounds.
Cassette G4: Super Programs 4 (ICL)
Hardware required - ZX81.
Price E4 . 9 5 .
Programs - Down Under. Submarines.
Doodling with Graphics_ The Invisible
Invader. Reaction. Petrol,
Description - Five games plus easy
conversion between miles per gallon
and European fuel consumption figures.
54
Cassette 65: Super Programs 5 (ICL)
Hardware required - ZX81 + 16K RAM.
Price - E4.95.
Programs - Martian Knock Out
Graffiti. Find the Mate.
Labyrinth. Drop a Brick_
Continental.
Description - Five
games plus easy
conversion
between English and
continental dress sizes.
Cassette G6:
Super Programs 6 (ICL)
Hardware required - ZX81 + 16K RAM.
Price - E4.95.
Programs - Galactic Invasion, Journey
into Danger. Create. Nine Hole Golf.
Solitaire. Daylight Robbery.
Description - Six games making full use
of the D e l' s moving graphics capability.
Cassette 67: Super Programs 7 (ICL)
Hardware required - ZX81.
Price: - E4.95.
Programs - Racetrack. Chase, NIM.
Tower of Hanoi. Docking the Spaceship.
Golf.
Description - Six games including the
fascinating Tower of Hanoi problem.
Cassette G8: Super Programs 8 (ICL)
Hardware required - ZX81 + 16K RAM
Price - E4.95.
Programs - Star Trail (plus blank tape on
side 2).
Description - Can you, as Captain
Church of the UK spaceship Endeavour.
rid the galaxy of the Klingon menace?
Cassette G9: Biorhythms (ICL)
Hardware required - ZX81 + 16K RAM.
Price E6 . 9 5 .
Programs - What are Biorhythms?
Your Blohythms.
Description - When will you be at your
peak (and trough) physically,
emotionally, and intellectually?
Cassette G10: Backgammon (Psion)
Hardware required - ZX81 + 16K RAM.
Price E5 . 9 5 .
Programs - Backgammon. Dice.
Description - A great program, using
fast and effi cient machine code, with
graphics board, rolling dice, and doubling dice. The dice program can be
used for any dice game.
Cassette G11: Chess (Psion)
Hardware required- ZX81 + 16K RAM,
Price - E6_95.
Programs - Chess, Chess Clock.
Description - Fast, effi cient machine
code, a graphic display of the board and
pieces, plus six levels of ability, combine
to make this one of the best chess programs available. The Chess Clock
program can be used at any time.
Cassette G12:
Fantasy Games (Psion)
Hardware required - ZX81 (or ZX80
with 8K BASIC ROM) + 16K RAM
Price - E4.75.
Programs - Perilous Swamp. Sorcerer's
Island.
Description - Perilous Swamp: rescue
a beautiful princess from the evil wizard,
Sorcerer's Island: you're marooned. To
escape, you'll probably need the help
of the Grand Sorcerer.
Cassette 613:
Space Raiders and Bomber (Psion)
Hardware required - ZX81 + 161< RAM
Price - E3,95.
Programs - Space Raiders. Bomber.
Description - Space Raiders is the ZX81
version of the popular pub game.
Bomber: destroy a city before you hit a
sky-scraper.
Cassette G14: Right Simulation (Psion) •
Hardware required - ZX81 + 161< RAM
Price - E5.95.
Program - Flight Simulation (plus blank
tape on side 2)_
Description - Simulates a highly
manoeuvrable light aircraft with full
controls, instrumentation, a view through
the cockpit window, and navigational
aids_ Happy landings!
Education
Cassette El: Fun to Learn series English Literature 1 (ICL)
Hardware required - ZX81 + 16K RAM
Price - E6.95.
Programs - Novelists Authors.
Description - Who wrote *Robinson
Crusoe'? Which novelist do you
associate with Father Brown?
Cassette E2: Fun to Learn series English Literature 2 (ICU
Hardware required - ZX81 + 16K RAM.
Price E6 . 9 5 .
Programs - Poets, Playwrights. Modern
Authors.
Description - Who wrote 'Song of the
Shirt'? Which playwright also played
cricket for England?
SI NCLAI R USER S e p t e mb e r 7982
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Cassette B3: 1/11-CALC (Psion)
Hardware required - ZX81+ 16K RAM
Price - E7.95.
Program - VU-CALC.
Description - Turns your ZX81 into an
immensely powerful analysis chart.
VU-CALC constructs, generates and
calculates large tables for applications
such as financial analysis, budget
sheets, and projections. Complete with
full instructions.
•
.
Cassette B4: VU-A LE (Psion)
Hardware required - ZX81 + 16K RAM
Price E7 . 9 5 .
Programs - VU-FILE Examples
Description - A general-purpose information storage and retrieval program
with emphasis on user-friendliness and
visual display. Use it to catalogue your
collection, maintain records or club
memberships, keep track of your
accounts, or as a telephone directory.
‘
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e
e
Cassette E3: Fun to Learn
series - Geography 1 (ICL)
Hardware required - ZX81 +
16K RAM.
Price - E6.95.
Programs - Towns in England and
Wales. Countries and Capitals of Europe.
Description - The computer shows you
a map and a list of towns. You locate
the towns correctly. Or the computer
challenges you to name a pinpointed
location.
Cassette E4: Fun to Learn series History 1 (ICL)
Hardware required - ZX81+ 16K RAM.
Price - E6.95.
Programs - Events in British History.
British Monarchs.
Description - From 1066 to 1981, find
out when important events occurred.
Recognise monarchs in an identity
parade.
Cassette E5: Fun to Learn series Mathematics 1 (ICL)
Hardware required - ZX81 + 16K RAM,
Price - E6.95,
Programs - Addition/Subtraction.
Multiplication/Division.
Description - Questions and answers
on basic mathematics at different
levels of difficulty.
Cassette E6: Fun to Learn series Musicl (ICL)
Hardware required - ZX81 + 16K RAM.
Price - E6.95.
Programs - Composers. Musicians.
Description - Which instrument does
James Galway play? Who composed
'Peter Grimes'?
Cassette E7: Fun to Learn series Inventions 1 (ICL)
Hardware required - ZX81 + 16K RAM
Price E6 , 9 5 .
Programs - Inventions before 1850.
Inventions since 1850.
Description - Who invented television?
What was the 'dangerous Lucifer'?
Cassette E8: Fun to Learn series Spelling 1 (ICL)
Hardware required - ZX81 + 16K RAM
Price - E6.95.
Programs-Series A1-A15.Series 51-B15.
Description - Listen to the word spoken
on your tape recorder, then spell it out
on your ZX81. 300 words in total
suitable for 6-11year olds.
SINCLAIR USER September 1982
Business/household
Cassette B1: The Collectors Pack (la.)
Hardware required - ZX81 + 16K RAM.
Price - E9_95.
Program - Collector's Pack, plus blank
tape or side 2for program/data storage.
Description - This comprehensive program should allow collectors (of stamps,
coins etc.) to hold up to 400 records of
up to 6 different items on one cassette.
Keep your records up to date and
sorted into order.
Cassette B2: The Club Record
Controller (ICI)
Hardware required - ZX81 + 16K RAM.
Price - E9.95.
Program - Club Record Controller plus
blank tape on side 2 for program/data
storage.
Description - Enables clubs to hold
records of up to 100 members on one
cassette. Allows for names, addresses,
'phone numbers plus five lots of
additional information - eg.type of
membership.
r
- at,
-
How to order
Simply use the FREEPOST order
form below and either enclose a
cheque or give us your credit card
number. Credit card holders can order
by phone - simply call Camberley
(0276) 66104 or 21282 during office
hours Either way, please allow up to
28 days for delivery, and there's a
14-day money-back option, of course.
ZX81
SOFTWARE
Sinclair Research Ltd,
Stanhope Road, Camberley. Surrey,
GU15 3PS
Tel: Camberley (0276) 66104 & 21282
To: Sinclair Research, FREEPOST, Camberley, Surrey, G1115 3BR
Please send me the items I have indicated below.
Item
Item
Code price Total
Code price Tote! oty Ceeeette
45
E6 95
30 E4 95
E2 English Literature 2
Cl Super Programs 1
4e £695
31
£4.95
E3
Geographyl
62 Super Programs 2
47
t e 95
32 £4.95
E4 Hustoy 1
63 Super Programs 3
443 L6 95
E5
Mathematics
33
£4.95
64 Super Programs 4
49 E8 95
E6: Music 1
34 £4.95
65: &ger Programs 5
E8 95
E7
Inventions
1
35
E4
95
G6
5
E 8 95
38
E4
95
E8
Sp
e
llin
g
1
- Super Programs 7
G7
1
52
E9 95
1
3
1
Collectors
Pack
S
37
E4.95
Glit Super Programs 8
E9 95
B2
Club
Record
Controller
53
u
£6.96
30
GO:Biorhythms
E7 95
pGla Backgammon
83 VU-CALC
30 £5.95
eG11 Chess
55 E7 95
84
40 £895
r
L29 95
41 L4 75
z x lei( RAM pack
012
P
27
E59 95
ZX
Printer
42
£3.95
r013: Space Raiders & Bomber
43
£5.95
Post
tt
packing
F
o014: Flight Sim ulabon
E2 95
only it ordenng hardware
a
44 £6.95
6.
gEl English Literature i
TOTAL S
n
r
t
a
a
I enclose
a cheque/postal order to Sinclair Research Ltd for E
m
s
Please
s charge my *Access/Barclaycard/Trustcard no.
y
I I
6
*Please
delete as applicable. L
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LAsictress
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Cassette
so
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55
2
.
Build your own
Sinclair
Special ZX-81 Kit Offer
ONLY L29•95 (plus p&p)
SAVE E20 on a Sinclair ZX-81 kit. A special
offer open only to readers of Sinclair User
has been negotiated with Sinclair Research,
which means you can buy the world-beating
ZX-81 for just E29.95 (plus post and packing).
Stocks are limited, so be sure to place your
order soon. Allow 28 days for delivery.
Maximum four units per applicant.
•
E
To: Sinclair User Special Offer,
ECC Publications, 30-31 Islington Green, London, N i 81Ij
Please send me_ Z X - 8 1 kit(s) at the special Sinclair User price of
E29.95 plus E2.95 p & p.
Please tick if you require a VAT receipt El
*I enclose a cheque/postal order payable to Sinclair Research Ltd for E
*please charge to my Access/Barclaycard/Trustcard account no.
*Please delete/complete as applicable
Signature
Name Mr/Mrs/Miss
Address
56
S
I
N
C
L
A
I
R
USER September 1982
S O FDRAW POKER M A
S un intha c r e dnol 1 0 and becomea multi
X etairathing• An Athr- tyre
millionaire or lose
'tome ba uid on mathematical probabilits
and inc ludm e recognisable gr a ph" si
t assent' only I 3 SIS
SINGO
M i n t be unsociable' S hare your ifX111 w i th
lamity a nd for r e t, in a pleasant game of
bongo T h e computer produses as m a in
tickets as 1.013 c a nt and displairs thr ntimlier,
hoard a nd draw Wringer regmredl
rassene only it3 kS
R uh programs on one cassette onlii l e 44k
All pr om i m p i t h
Ebeques or I ' l l ; to
S OFIltaX ( Dypt S
26 T h u d
fladh
total
M
a
i
*FROGGER
it•
IX 81 i t6 L j los t'
e M oving Cars, Logs, Turtles
4
*
•
*
A lliga tor s . OIVI4N1 Turtles
Thr e e •Screen-a' o f A c tion
A l l Arcade Features
E ntirely M achine- Code
ONLY l b 951nr, P h P
•
•
*
*
•
a
ZUCKMAN
First A uthe ntic 1X 51
Version o f 'P U C K M A N '
* A L L M achine Code ttOk t
* F O U R Inde pe de nt Ghosts
• b a d , E n e rg y P o st s e tc.
• E legh score 'Hall of Fa m e
• A uthe ntic Arcade A c tion
l
older on h
ONLY 15.95 inc. PEP P
S end P O or cheque to
DJL SOFTWARE
ZX-81 16K ADVENTURE GAME.
Full 16K used. Plenty of Action map supplied, plus detective game
of Logic 12-4 players). B o t h o n
cassette only 0 5 0 , S. Taylor, 2
Greenway, Elt ham, London SE9
5SZ.
9 T w e e d C los e , S w i n d o n .
Wilts S112 3P U
D EEPR OM - AD D EPR OM POWER
TO YOUR ZX COM PUTERS
2716 VA•Eprom Progra mme t, with LIE
stored i n E p ro m S i m p l e t o u se ,
SI NCLAI R BUI LT ZX-81. i - Bi pac sound box. Original packing +
manual l e a d s p o we r - p a c k , 3
cassettes f o r 1 6 K + Z X - 8 1
companion E80 o.n.o. Phone Oxted
2834.
EDUCATIONAL SOFTWARE
2X-S1 I 56K/
G .C .E . " 0
-R E V IS ION : 3 te a c h a n d te s t Gr a m m a r
programs
L E V plus 3 Vocabulary programs.
EI.C_E. "0 " LEVEL M ATH S REVISION:
E
I le eLc h and test OfOgfaWn plus 2 programs
F
R
of generated
questions / rpm "0 " le ve l
syllabus
E
N ( with e x pla na tions t
JUNIOR
M
ATH
S 1: Long Multiplication.
C
H
Long Dnision, HCF. L CM, Frachons 11
- I, FractiOnS 2 ( E t + I .
J U N I O R M A T H S 2 : Areas, P erimeters,
S imple E qua tions . P e r c e nta ge s , S e ts ,
Venn Diagrams.
JUNI OR EN G L I SH 1 M e a n in g s I .
Meanings 2 Ihardeti. Pa rts o f Speech.
Prok,erbs, Sondes. Anagrams
JUNIOR ENGLISH 2; Idioms. Opposites
I, Opposites 2 thaw:let/. Group Terms. Odd
Word Out. S pellings
ARITHMETIC FOR T H E U N D ER I ' s:
A dd. S u b tr a c t, M ultipis i D i v i d e A l l o w s
lot antrir of unit; fi rst 3 levels.
EDUCATIONAL QU I Z . 4 programs on
General K nowle dge , R e a s oning, E nglis h
and M a th s , A l l q u e s ti o n s u s e R N D
function.
14.50 pa n ca e se tte o r se n d sa e f o r
catalogue to R O SE C ASSETTES. 148
Widnay Lane. Solihull. We st M idla nds
891 3 LH.
SI NCLAI R USER S e p t e mb e r 1982
25V Sta bilise d supply tor I A/ 17.75 QV
,Eprom-read ca rd 18.25 CO.
Eprom Progra mme d wit h Bre a ko u t.
to o l k i t ' r e n u m b e r , r e a d , d a t a ,
restore bloc k - fi ll, bloc k - de le te , s i te o f
program. fr e e memory, decimal hem, hex decimal, M C E prom Read Card'.
P rogrammer a n d R e a - d c a r d c o n n e c t
cleecly to z x• el /80.
P • P on A and B i t ( U .K .' , ( 2 overseas
ZX - S P E C TR U M ? P lease enquire
ORME ELEC TR ON I C S, 2 Bia rrippe r
R d.. C e m bor is it C o r n w a l l .
sinclair
supermart
BI NGO ON 1K 13 line listing calls 1
to 99 random order and displays
tabulated check-back. Cheque or
P.O. El to C. Jefferies, 280 Whitefields Rd, West Midlands B91 3PA.
ZX-81 I N C U S T O M - B U I L T
CASE. 16K RAM. Power supply.
Full size keyboard, leads, manual
240V out let e x t speaker, Ta p e
power outlet, Fully fused, must be
seen. Plus programs E100.
CAR LOG
A new USEFUL suite of proletztonai
programs lot the 2X81116K).
1 V e r y simple t o us e wit h f ull
instructions.
2. C o m p l e t e ca sse t t e r e c o r d o f
mileage a nd ite mise d e xpe nse s.
3. A l l conceivable ratios, totals and
projections computed.
CAR LOG is suitable for your car, your
c l a d ; c a r or y our w h o l e fl e e t o f tr u c k s
Only E8.95
NI MRO D SORPNARE
4 Stanley Rd., London SW14 7132.
SPECTRUM AN D lX•111 SOFTWAR E
COSM OS. Sa ve your fle e ts horn the
marauding aliens in Moo n e w rm'c specs
game w i t h dr e m a nc gr a phic s o n y o u r
ahip's sensor screen
(
4
. 1
1
QU A LITY GAM E S O.J i ) N (
TABLE TUTOR. A complete menu driven
• EVOLVE
senoce for the uncle" 10's.
CASSETTE FOR DUD
course i n m u l ti p l i c a ti o n ta b l e s w i t h
exemiales, m a l l - hom e wor k o w l a ns we r
FULL SCREEN INTERACTIVE "LI FE"
• BRE AKO UT
• NI M
QUARTE T. A c om pe ndium o l
crosswords, puz z le s a n d m e m or y ga m e
ImultiployerI with up to 10 difficulties.
CCU
4 S K ILL LE V E LS Er U N B E A TA B LE
METEOR S TO RM
FA S T M O V I N G G R A P H I C S G A M E
T R I A D . Three new puz z les 10 perplex and
In/strata even the Cubists c 3 . 2 *
S upplie d on cassette S AE for c e ta logue
VORTEX SOF T WAR E 2 6 C ra wford
SEND
CHEOUE.• P O WITH ORDE R T O
Road. H a tfi e ld, H a r tfor da llior A LIO OPQ
ROWLANDS Et SI M M ON D S
SI NCLAI R ZX-81, 16K RAM, 9
months old, c omplet e. Excellent
condition. E80. Marmer, Whitehall
Co t t a g e , R h o d e s M i n n i e .
Canterbury, Kent CI 4 6YA. Tel:
Lyminge 862604.
45 M e r r ie fi e ld A v e . B r oa ds ione . D or s e t
ONLY E3•954I11CPEIP)
S ocket, low cost Cl ( 2 7 .7 5 IA)
Enables M C a n d ba s ic m utinie s t o b e
instructions and s oftwa r e supplied.
S P E CTRUM P R O G R A M S .
BOMBER - high quality compulsive basic program plus PAINTBOX
- sketch, draw, print , save and
load f o r cartoons, displays et c .
MOO on cassette. D R Pope, 62
Cockereil Close, Wimborne, Dorset
BH21 1XT.
ZX 16K
MARVELS 4
ZX-81 G A M E S F R O G G I N G
larcadefroggerl. Guide y our f rog
across the river. Becomes harder,
crocodiles etc. MI NO TA UR. Beat
the mons t er t o ma z e ex it . £ 4
cassette! D. Warrington, 1 Haddon
Drive, Bakewell DE4 1 BD.
16K/81 G A M E S TAP E includes
Ch i n v a d e r 1 , C h i n v a d e r 2 ,
ChScramble, ChCent ipede
Maze,
All in mic , very
r C hChStartrek,
3 - D
fast and addictive. On tape for only
E5.
WANTED. WANTED. Top quality
16K ZX•E11 a n d S p e c t r u m
programs. Hi g h e s t c ommis s ion
paid. P l e a s e s e n d t a p e a n d
instructions to: Scorpio Research,
24 Geary Drive, Brentwood, Essex.
10 ZX-81 1 K G AME S TAPE.
including: UFO, Air Battle, Doodle
Bug, Demon Kill, + sock on soft
keys S e n d E4.00 (Post Free) t o
Jackett Sof t ware, 4 8 Fairwat er
Ave, Welling Kent
DOM - 16K
FOOTBALLPOOLS PROGRAM
• I m t s out i n order ot pr efer enc e, i t * 18 m os t
Skalt s c or e- dr aws , a l s o t h e 1 5 m o s t
homes. draws and aways,
• P icks o u t th e results o n th e bookmakers'
Amid Odds coupons ihm have bum given oSAIN
cipomxi5. m ils Calculates your expected profi t
,• A llows the USW to update the tables weed, by
week as resort* come in
For a cassette of the program, pips err rostrocPoo le a fl e t g n a w a br ie f explarratron o f the
reet
, H A R T L A N D S O FTWARE
t
iD e pt. S I
s PENZANCE
c
PLACE. LONDON W11 4 PA
o r
i
t
5
9
5
Independent
researcher c learing
r
Out
o current/on-going project files.
ZX-81 /SATELLITE
T V
(Ot her c o mmi t me n t s p r e v e n t
c o mp l e t i o n . ) S a t e l l i t e T V
Documentation i n t h e f o r m o f :
Original material - phot ographic /
phot os t at ic r e p r o d u c t i o n s computer listings - programme
c as s et t e. I n c l : T e c h n i c a l
De s c r i p t i v e l i t e r a t u r e
"buz z word" jargon dic t ionary what's what / who' s who directory
- satellite disposition schedule dish antenna parabolic curve/form
generator. A vast amount of facts,
figures etc. giving a valuable insight
into t omorrows "b o o m" business
of t he electronics industry. Send
cheque/ PO to the value of E5.00 to:
A. J . Innes, 82 St Pauls Parade,
Cus wort h, Do n c a s t e r , S o u t h
vorkshire DN5 8LP,
Is u p e r m a r t
sMA ZI NG N E W B R E A K O U T
A
FOR 16K ZX-81. Features: s uper
fast
machine code speed, on screen
is c oring,
ex c ellent graphic s ,
Bef ore/ Af t er g a me r a n d o m
n
graphic s p a t t e r n s . A l s o t w o
versions of Star Smash. You whiz
c
past fl ying stars. Also in machine
code. Just send E3.95 to Autosoft,
5
Burnside, East Bolden, Ty ne Er
lWear
NE36 OLS. PO/ Cheques t o
M. Watson,
a
i sPoRTIM; 1-011ECAS1
r
I SINCLAIR DtS1 16K
Rroforwor Fr a nk Ge or g' ' , wadi
k n o w n F o o t f a l l P ools F a / a : m u m
P rolltern is now available cm the
tr ,r n ver non w o n
A N or m risco Forecast Program
Fr, praparstress,
Writs to P r ofa m or F U . Georgie
Sorsa,u o f i n fo r m . , ton
C o r n r o w . Helms, H igh 5 . 0 0 . .
Charlont S t, Grine, a o , k a
SPECTRUM AUDI O AMPLI FI ER
- really hear t he keyboard and
BEEPs, jus t plugs in, only E9.95
complete. A . Pennell, 14 Swey n
Rd., Cliftonville, Kent.
57
SPECTRUM — 1X81
BUSINESS
GAMES
- DWI/SPECT RUM
•P S.E GAM ES TAPE ( 1 8 KI - Towe r of
Wipe-out. liksailia Attach, Stopwatch,
-Brahma,
Space Adventure and Depth Charge,
e3.,71141nc. PEW'
• P S E G AM E S T AP E 2 116K) F r u i t
Machin*, Ba ttle ships, Fighte r Pilo t . N ig h t
Fighter, Defender. Missile Command
E4-1151inc.PEsIP/
'Arcade games on Games Tape 2 written in
fast. action machine code, I
P.S.E. GERM AN LANGUAGE EDUCATION
SYSTEM 1600,
Children ta king ' 0 ' o r ' A
&brood?
Wa nt t o improve your
. l e v Perilnerids?
e rs?
current
B u sstandard?
i n e Syste
s s m cove rs grammar.
verbs. vocabulary. hints and aids for learning.
Inducting random tests to test progress and
drive le ssons h o rn .. 4 ta pe s. G ER M AN
GRAM M AR I , 2 , a n d 3 . a n d P S E.
DATAPH RASE a computeroad phresobook
for essential phrases in common usage
Each lo p e E5,511 o r Ell, SO for a ll 4. Price s
include P&P.
•P S E FRENCH LANGUAGE EDUCATION
SYSTEM (18K I. - - Available shortly.
P S.E language tapes produced in conjunction
with e local school. Special terms can be sent
on request for school usage
Profe ssiona lly-produce d t a p e s a n d
doc um e nt/M on b y m a d o r d e r o n l y f r o m
Precision Software Engineering, 2 0 Shelton
Ave N e w a rk, N one N G2 4 4 N X. S AE f o r
P E RS O NNE L R E C O R D
SYSTEM. Co n t r o l s rec ords o f
holiday s a n d s i c k n e s s w i t h
management r epor t s _ • M e n u
driven •Displays records on screen
or direct to ZX Printer ' High speed
machine•code save and load facility
to create data files, Two programs
on one cassette priced C9.95. Send
cheque or postal order to!
Warren Newman, 3 Thalia Close,
Greenwich SE10 9NA.
SPECTRUM?
AUTOCHEE As MG you must negotiate
lor teases. decide on menu prices. hive' of
wages, a dve rtising a nd devidancht a nd
forecast levels of inflation liyo u are not
successful you will he made to M inn I
AIRLINE. You must decide on number of
aircraft to operate, loan and fuel contracts.
whether to buy or charier, and levels of
NEW GAM E • 2 PLAYERS •
116X S
• • • STELLAR
pet
DUEL • • •
Only one Sta rsho
will survi, r
n u r Captain
r
to command the
Inve
r's'
Reel
il
WILL IT BE YOU?
• L AN D ON PLANETS
• PH ASOR S
• SEN D IN ASSAU LT TROOPS
• W AR P b su e LIGHT SPEED
• C OLOU R SO U N D C AR N AGE'
SPECRUM ON I TS WAY?
s ta l fi n g
Have this S UP E R N E W GAM E ready
a n d
m a inte na nc e .
PRINT SH OP. As owner o f a printing
,:ompany you have to deLiclis on staffing.
000fIr SIOCCS, quota tions , wor k schedule
dInd cash requitenvents•
re 75 f o r one , 1 8 .0 0 f o r a n y t w o o r
E12,00 for throe .
14 Langton Wa y.
London SE3 7TL
Tel 0 1 858 0763
BI NGO ON 1K • 13 line listing calls
1t o 99 random order and displays
S P E CTRUM
W O R D
tabulated
check-back. Cheque or
PROCESSOR. On•screen edit —
PO C l t o C . J e t t e r i e s , 2 8 0
insert, replace, scroll. Word-wrap, Whitetields Rd, West Midlands B91
justification, fi le-handling, double- 3PA.
space p r i n t i n g . Ca s s e t t e a n d
manual £15. L-GAME, new, based 10 A M A Z I N G 1 6K Z X - 8 1
on de Bono, CS. Brian Hebbes, 6a G A M E S , I n c l u d e s s t a r t r e k ,
Newlands Avenue, Southampton.
Pacmaze and vampires. Very good
graphics. $8 o n cassette.P .0. o r
cheques t o Mic hael Bredbury, 25
ZX81 (16k)
Brynhedydd Road, Rhy l, Clwy d,
educati onal s of t w a r e
North Wales LL 18 311H.
Easy load cassette 15 75 Inc poet etc
TRICODER C AM BR I D GE
(M oil orde r'
75, Oxford Rd
Cambridge C8 4 3PH
Z X S P E C T R U M 16K
GAMESPACK 1 . Fa s t movi ng
asteroids, B a t n u m, B o m b r u n ,
missile c ommand a n d def ender
only, £5.50 the lot_ Sae for details.
R. Bhattacharya, 3 Wensley Close,
Harpenden, Herts.
OMEGA* SOFT. The last word in
educational and games programs
for t h e SPECTRUM a n d ZX-81.
Maths1 o r Englishl 19-14) onl y
£3.95 f or 5-prog cassette_ Sae for
catalogue. 299 Laburnum Grove,
Portsmouth,
further details,' up to dale price list,
ZX-81 + 1 6 K R A M S I NCLAI R
BUILT. Leads, adaptor manual all
box ed. H a r d l y u s e d , p l u s
computable ZX and phone pad etc_
C70. Writ e Harrison, Flat 933, 19
Newport Court , L o n d o n WC2 H
7JS.
ZX81 + ME MO TE CH 64K. Cost
f150 but will acceptC110 o.n.o. J D
Peel, 1 0 Cr o f t l a n d s B i g r i g g
E g r e mo n t C u m b r i a , P h o n e
Seascale 28333 ext. 23393 in day.
ON YOUR MARKS?
: Primary arithmetic in the
::. form of games • •••
Five routines on one cassette
accessed by menu selection.
Superbgraphicsenhancement:i::
•:•
Price: €6.95
Computatutor
3 Thalia Close.
Gr eenwi ch SEW
Sell your used computer or per i pher al s thr ough Sinclair
S upe r m a n at l ow cost ... up to 30 wor ds for only f 5.
Have you updated your computer or do you no longer use that add-on ' Ins tead of
leaving it lying around, turn it into cash be pla cing a cla ssifie d advertisement in
Sincla ir Superman t and ma th around 4 0 .0 0 0 irSerft Of the Sin cla
ir Z Xwrite
Please
s your
y s advertisement
t e m s
in the boxes be low. one word per box Unde rline
war ds required in bold type Your name a ddre ss a nd/ or telephone number
Should be included Please print in block camtals
Note—this se rvice is open only to priva ir a t Ivor tisets The advertisement Vied
appear in the earliest possible issue
.
.
ADVERTISEMENT INDEX
ABERSOFT
4
9
ADDICTIVE GAMES
5 0
AFDEC
2
2
ARTIC COMPUTING
1 8
BUFFER MICRO
1
5
CALPAC
39
CAMBELL SYSTEMS
26
CAMBRIDGE COMP. SHOP 44
CARNELL SOFTWARE 5 2
CLASSIFIED
5
7
Et 58
COMPUTEX CASES
8
13_1C TRONICS
1
1
DATA ASSETTE
1
7
DEAN ELECTRONICS 4 . 9
DIGITAL INTEGRATION 2 4
DOCI MODUS
5
2
EDUCARE
5
0
ELECTRIC PENCIL CO. 3 5
FULLER MICRO
1
4
GEMINI MARKETING
2 5
HARRI S& LOCKYER
2 6
HEVVSON CONSULTANTS 4 6
HILDERBAY
4
0
INTERFACE
22
40
J.K. GREVE
18
KAYDE
60
KEMPSTON
2
4
LINSAC
3
5
MC ASSOCIATES
2
0
MELBOURNE HOUSE
4
MEMOTECH
4
3
MIKRO GEN
3
6
MICROWARE
2
6
MICHAEL ORWIN
2
NORTHERN PREMIER 2 4
OASIS SOFTWARE
4 4
P.S.S.
4
9
J.G. PRINCE
2
5
PICTURESQUE
4
0
PHOENIX MARKETING 3 8
READOUT
5
9
RI CHARD ALTWASSER 4 4
SCISOFT
2
5
SOLENT SOFTWARE
2 6
SILICON TRICKS
3
6
SOFTWARE FARM
2
0
SOFTWARE LIBRARY 3 9
SILVERSOFT
3
9
SECOND-HAND SINCLAIR 2 4
36
TASMAN
TI MEDATA
35
22
ZX SAS
Name
Address
Tel
Have you include d the fee of C S'
C. . 1 1 . . M . I n
I I . Aot•nrI l i k a ma nt Pi tan•gl er N O P . % rne ,
. . . G P . , a n t I '. . . g•I
Ar l w a . . 1 . . . . . . . 4 • • .br re e na . " W M .
w . . . • n i t . . . O M to ON. • ,,,,b i p t I na &doe . 1 . . . . . . . . M a n e . . lel 0 . t e , I 1.
,
. . .. . .P
.. M
, , , M , , ro. . 1 . . . l a m a r•ne , twe . o p e mi ni s i v . WO , Ab . • ,
, fr.... a , , INS. • • • • •
I “ . . . 1 1 . , . . . A. t . . . . . , e - i m i , •overell f 11•1 gh. U
. .n. . . 1 0 1 . I MO . owl.wywa, I n . I NI fi r. W•e tt tr. r, i , o , g a ,on. i a . m. , . . ge n r a p . . . .
I .r 4 tP P 4 .4 .. 4 . 10.
• L.E
. . ,
,
, . a . ,
. o ,, s
r rome. . . . . . . . . . c l I m I I . . . 0 1 , , , , s h •
•gng, ally
, • • • • • • • • . . . of , n g , V A p . a . 1 •• I .m o . * P r o m a4 n . p r . . , . a nii c c . , ro.
, 0 tar d m a r t . d Iv. ha . a l ( V P . - . - . • I
11 • i • k a r
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58
SI NCLAI R USER September 1982
THE ZX BOOK CLUB
DUE SEPTEMBER 1982
written by the man who helped write
the documentation for the ZX Spectrum:-
An .
d i 441
4
•
1 P4 h ..
f t ,
LEARNING TO USE
-1
0 0
10
16.
4
Mori
:
o n l y
THE
ZX SPECTRUM
COMPUTER
1 6 E
. g•
%
by Robin Bradbeer. 1 0 0 pages fully illustrated.
SIMPEEELECTS?
PROJECTS()111C
__Fp
rotxsinotoic.
'? .puters
M A r To
* o
c t - vl
af et
*
tap
ei
A I _ Z )3
r
N E 0 14("
e
,
1
0 8
3
e 1
1
This book has been written specially to help new and prospective
owners of the ZX Spectrum to easily understand the operation and
full capabilities of this amazing new microcomputer.
• Pro vi d e s clear descriptions o f the hardware and functions,
describing use of the new keyboard, command keys and editing
facilities.
• Exp l a i n s simple programming using Sinclair BASIC.
• D e scri b e s graphics and colour facilities in detail.
• In c l u d e s many programs, including animation.
• Ap p e n d i ce s cover technical details and a glossary.
A L S O D U E SEPTEMBER 1982 — and also by Robin Bradbeer:-
LEARNING TO USE THE o n l y z
ZX81 COMPUTER
by Robin Bradbeer, 100 pages fully illustrated.
a
E
5.95
In the same series as the Learning to Use the ZX Spectrum, this new
book follows the same format, style and content and will prove an
invaluable guide for new (and experienced!) ZX81 owners.
Other bestselling titles:-
Byteing Deeper into Your ZX81 by Mark Harrison
20 Simple Electronic Projects for the ZX81 by
Stephen Adams
Mastering Machine Code on your ZX81 by Toni Baker
The ZX81 Pocket Book by Trevor Toms
READ-OUT PUBLISHING COMPANY LTD
8 Camp Road, Farnborough, Hampshire, GU24 6EW Telephone: 0252 510331/2 Telex 858001 GOWER G
READ-OUT PUBLISHING C O M PA N Y LTD r
8 CAMP ROAD, FARN BOROUGH, HAMPSHI RE GU24 6EW
24 hour ans wering service. Telephone: 0252 510331 2
Name
Please reserve my copy/ies of
Learning to Use the ZX Spectrum
£5.95
ElLearning to Use the ZX81 E 5 . 9 5
Addres s
E l Please send me c o p y / i e s of
Byteing Deeper into Your ZX81
£645
0 20 Simple Electronic Projects for
the 2X81 f 7 45
Make cheques payable to Read-Out Publishing Com pany Ltd
I enclose my cheque for
Please debit my Access r i
......11.111.111111.1111111.111
0 Mastering Machine Code on Your
Signed
Dais
ZX81 i Ell 50
The ZX81 Pocket Book f 6 95
KAYDE Electronic Systems
ZX80/1
Z X KEYBOARD WITH
R E P E AT K E Y
Fully cased keyboard 0 7 . 9 5
Uncased keyboar d
E 2 7 . 9 5
Keyboard Case
E 1 0 _ 9 5
• a hignly professional keyboard using ex ec uit , uuttons as f ouild ;,r. t op • d l i t y
I t em It has a repeat key and comes complete in its own luxury case- This is a genuine
professional keyboard and should not be confused with toy keyboards currently available on
KAYDE 1 6 K R A M PA C K S
•
T
pebble
with all accessories and needs no extra power and therefore it will run quite happily on your Sinclair
h
power
supply.
It does not over-heat and will not lose memory at all As you may know some makes go down
e
to I l k after being on for a while.
1 16K RAMPACK is very stable and will not wobble or cairc.r.
This
6 and tested with a complete money back Guarantee.
built
K
R
A
Stops m ovem ent of RAM P ACK and other accessories
M
P(Not needed with a KAV DE RAM PACK)
A
C
K
/WOE Graphics Boar
S
4K Graphics ROM. This will give nearly 450 extra graphics ark/ with there
,-re ,with
, oa pre-programmed
b a b l
i • • m a k e s a total of over nine hundred.
in
y
,
m KAYDE Graphics Board has facilities for either 2K or RAM (for user definable graphics/ 4K of ROM or
The
s
A
i
s
Our
p 4K Tool Kit Chips that will be available shortly. All the graphics are completely software controlled,
t
therefore
they can be writ t en into your programmes. Here are a f ew examples: A f ull s et of s pac e
l
invaders
y — R u d m a n — Bulits, Bombs — Tanks — Laser Bases end Alien Ships.
y
y
e
p
t
l NO EXTRA POWER NEEDED
I
u
t
g
t
i
sPeck
• only true ZX version p o p u l a r arcade game.
t
•sall I think this is the best presented moving graphic p
sCentipec
e
I • "a n
ce
t
a Invaders:
t Thel a n y w h e r e .
r
' '• • c ar
l
y
a
i
n
i
s
i
g
•
d
e
h a oy
3D
Labyrinth.
A Cubit Maze that has corridors which may go left, noht, up, down.
t -eckmen
!
(the
latest
addition in 81 gamesi
o
i f ap
WHY
WAI
T
TO
PAY
MORE
u
n c ee
EAST
r I MMEDI ATE DELIVERY
E
t
1
Z
to:
D
E
P
T
.
o Post
,
X SU
Dept
S
U
S
t
a
8
Electronic Systems Ltd
h Kayde
l
1
The
Conge
e
l
.
Yarmouth
V
I
S
A
I
enclose t:
u Great
I
I
Norfolk
NR30
1P„I
i
l
k
A
l
N
a
me
s
t
t
e Tel:
h 0493 57867 (Dept SU)
A d
d
r e
s s
c
r
i
o
Don't
Forget you can always order
p
n
m
o onk the telephone with your credit card •
e
Please add 1'1.50 Pi P for all hardware and 50p for all software.
r Allt products include V A T all hardware
s
Please make cheques payable to Kayde Electronic Systems Ltd.
t comes
h
L.
fully built and tested with
a
• 1i 4 (
t
s
t - i
h fl sy
e mt
r
h
KAYDE F L E X I B L E RIBBON CONNECTOR
KAYDE 4 K GRAPHICS BOARD
KAYDE 1 6 K GRAPHICS BOARD SOFTWARE
KAYDE 1 6 K 81 S O F T WA R E