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Cheats and 



•ZMZIM! K 



revealed! 




Compute a 
fun brew for 



EcJlovfii! 




For /-U.L. users 
of the Electron, 
BBC Micro, PC, 
Amiga, C64/128, 
Archimedes, 
Amstrad CPC, 
Atari ST and 
Spectrum 

No 3 October 1990 
A Database Publication 



10 



770960 



283003 






PRICES GO OFF THE RAILS! PRICES GO OFF THE RAILS! 



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DISC PRICES GO UP IN SMOKE! 



9 



o 



3.5" DISCS & BOXES 

n if 8188 ! H S! 8RH !§S SSSS3 tSSSItl TO! g =|| 

55 3 5" DS-DD 135 TPI WITH 100 CAPACITY LOCKABLE STORAGE BOX £32.95 

65 3 5" DS-DD 35 TP WITH 100 CAPACITY LOCKABLE STORAGE BOX £38.95 

75 3 5" DS-DD 135 TPI WITH 100 CAPACITY LOCKABLE STORAGE BOX £42.95 



100 3 5" DS-DD 135 TPI WITH 100 CAPACITY LOCKABLE STORAGE BOX £52.95 

50 35" DS-DD 135 TPI WITH 100 CAPACITY LOCKABLE STORAGE BOX £72.95 

200 3 5" DS-DD 35 TPI WITH 100 CAPACITY LOCKABLE STORAGE BOX £82.95 



OUR 3 5" DISCS ARE VERY CAREFULLY SELECTED TO GIVE YOU 100% ERROR 
FREE PERFORMANCE. EACH DISC IS OFFERED WITH OUR 100% MONEY BACK 

GUARANTEE AND IS SUPPLIED WITH LABELS 



5.25" DISCS & BOXES 

U & 81:88 fe 7?\ BSH Z g&SH ISSSffi USSJii gg ::::::|i| 

50 5 25" DS-DD 96 TPI WITH 100 CAPACITY LOCKABLE STORAGE BOX £24.50 

100 525" DS-DD 96 TPI WITH 100 CAPACITY LOCKABLE STORAGE BOX £29.50 

200 5 25" DS-DD 96 TPI WITH 100 CAPACITY LOCKABLE STORAGE BOXES ..£52.99 

OUR 5.25" DISCS ARE YEB1 CABEEUU1 SELECTED TO GIVE YOU 100% ERROR 

FREE PERFORMANCE. EACH DISC IS OFFERED WITH OUR 100% MONEY BACK 

GUARANTEE AND IS SUPPLIED WITH LABELS 



HIGH DENSITY 3.5" DISCS 

10 DS HD 3.5" DISCS IN LIBRARY CASE £14.99 

30 DS HD 3.5" DISCS WITH 50 CAPACITY BOX £39.95 

50 DS HD 3.5" DISCS WITH 100 CAPACITY BOX £49.95 

100 DS HD 3.5" DISCS WITH 100 CAPACITY BOX £89.95 



HIGH DENSITY 5.25" DISCS 

20 DS HD 1 6 MEG WITH LOCKABLE STORAGE BOX £14.99 

50 DS HD 1 6 MEG WITH LOCKABLE STORAGE BOX £27.99 

75 DS HD 1 6 MEG WITH LOCKABLE STORAGE BOX £39.99 

100 DS HD 1 .6 MEG WITH LOCKABLE STORAGE BOX £47.99 

200 DS HD 1.6 MEG WITH 2.100 CAPACITY BOX £89.95 



I QW LOW PRICES 
FOR BULK BUYERS 

For all you large users we have some 

unbeatable BULK RATES ON OUR 

SUPERB DS-DD 3.5 DISCS 

400 DS DD 135 tpi £160.00 

500 DS DD 135 tpi £195.00 

600 DS DD 188 tpi £229.00 

800 DS DD 188 tpi £295.00 

1000 DS DD 135 tpi £320.00 

AS ALWAYS LIFETIME GUARANTEEED 

UNQUESTIONALBLE RELIABILITY. EACH 

DISC IS SUPPLIED WITH LABEL. 



LOOK 

NEW EXCITING PRODUCTS 

NEW TecMink Mouse Inc Inage 72 software £29.99 

NEW Aero Moum inc. ft Halo £29.99 

Both above have Drwr Menu Maters, Mouse Pad fi Pocket 
NEW StaduWe Boxes 250 capacity 3.5 only £17.99 

NEW Ultra Sliniine V.P.S. Battery Back up systems 
(Ptease nng for pnees S speaficaoonst 

We also carry Cables, Data Switches, 
Disc Drives etc., etc 



T 



PRICE & QUALITY 
GUARANTEE 

We pride ourselves on 

offering you the very Highest 

Quality products at the best 

possible prices. If you 

should ever see a 

comparable product offered 

cheaper in this magazine 

DO NOT HESITATE give us 

a call because we won't 

match it. 

WE WILL BEAT IT 
GUARANTEED 




Trade Accounts Welcome 



M.D. OFFICE SUPPLIES 

1 8 CRESCENT WAY, FARNBOROUGH, KENT BR6 9L$ 
TELESALES HOTLINE: 0689-61400 

All prices include VAT and delivery UK only. E/OE 



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Education Orders Welcome {/J 



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3 GREAT CONTESTS 



NEW! 

The Games Gang 
reveal all the best 
cheats and passwords 

GOTO CENTRE PAGES i{ 



WIN the latest 
Amiga - and lots 
of other prizes 

GOTO 9, 17 and 43 



Pop Quiz 



'<S& 



GOTO 26 



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Get your computer 
to mix you a 
witches 1 brew 



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Published by Database Publications Ltd, Europa House, 
Adlington Park, Macclesfield ST10 SNP 

Teh 0625 878888 (All departments) 05 1-357 296 1 (Subscriptions) 
Telex: 94031191 Fmx: 0625 879966 MtcroLink: MAG001 



Managing Editor Derek Meakin 
Features Editor Peter Davidson 
Creative Editor Mark Nolan 
Ace Cartoonist Mike Goldberg 
Production Editor Peter Glover 
Ad Manager John Snowden 
Ad Sales Yvonne Benson/John Weir 
Circulation Exec Carolyn Wood 



O 1990 Database Publications Ltd No 
material may be reproduced in wtiole or in 
part without written permission While 
every care is taken, the publishers cannot 
be held legally responsible lor any errors 
in articles or adven:isements 

News trade distribution Comag. 
Telephone 0895-444065 

Database Publications l» a 
division of Europress Ltd 



m 



Regulars 



Final Front Ear 

Rom and Ram 

Gadget Shop 

Safe Scientist 

How a Computer Works 

Keyboard Kapers 

Logo Lowdown 



GOTO 8 
GOTO 1 1 
GOTO 14 
GOTO 18 
GOTO 20 
GOTO 27 
GOTO 35 






LETS COMPUTE' OQlOOer 1990 3 






I have discovered a bug in the 
Gingerbread roms program. I 
typed it in on my BBC Micro 
exactly as it is shown. 

But I received the error 
message: Mistake at line 260. 
When I examined that line I 
discovered that the command IF 
had been left out. 

The corrected line is: 

IF r<1 THEN PRINT ;"Three 
quarters";:R£TURN 

- Matthew Thompson (16). 
Kidlington, Oxford. 

We're sorry the word was 
missed. The listings are 
all well checked before 
printing but we missed 
that one. 

We're stepping up up 
our testing to ensure it 
doesn't happen again. 



you have any tips for other readers, send 

them in. If you have any questions about 

your computer or software just ask us. We'll 

try to answer them on the Noticeboard. 

Let us know what you want to see in future 

. And if we use your letter or ideas 

we'll send you a Let's Compute! 

baseball hat! 

Send your letters to Let's 

Compute! Europa House, Adlington 

Park, Macclesfield SK10 4NP. 

^"^ Remember to tell us your age. 




The second issue of Let's Compute! was great. Even better than 
the first. And that's high praise indeed! 

I like the electronic game in The Gadget Shop. We had one at 
our summer fair, and there's one at the Science Museum in 
London. I can do all three of them. 

The pictures in Al's Gorithms are really sweet. It's amazing what 

you can do with circles. 

The Back to the Future program is really useful. I always want to 
know what day things are on. whether I've got a piano lesson on 

my birthday and so on. 
The program now does it for me. I don't need to look at the 

calendar any more. 

And what about the football bit? It is probably interesting if 
you're interested in football. But I'm not. 

Finally, I think the competitions are great. Let's have even more! 

- Kathryn Price (12). Alfreton, Derbyshire. 



Winners! Winners! Winners! 
Winners! Winners! Winners! 

Hundreds of you wanted to personalise your computers 
with cute Computer Critters. But we only had four to give 
away and they're winging their way to the winners of the 
contest we printed In the August Lot's Compute! 
Congratulations to these lucky winners: Miriam (8) from 
Chigwell in Essex, Steaphnie Leack (11) from Lancaster, 
Jamie Radford (14) from Uplands near Swansea and 
Jason Cooke (10) from Bromsgrove. 

Hard luck losers. But we've even more prizes to give 
away in this issue of Lot's Computet So see if you can win 
one of those. 




Entries for the 
Alphabet Artist 
contest are still 
pouring in. But 
there's still time 
for you to send 
yours before 
November 30. 

The picture of 
Churchill shown here is by Martin 
Pegg (13) from Derby. He's just one 
of this month's five lucky winners 
who'll be receiving a copy of Art 
Studio from Impact Software. 

This month's other four winners 
are: 
John Pearce (15) from Knaphill, 

Surrey - a Spitfire 

Owen Williams (12), Haistead, 

Essex - a helicopter 

Richard Gubbing (10), Congleton, 

Cheshire - Fat puss the cat 

Gemma Hillman (7), Loughborough. 

Leics - a dog 

Don't forget, there are lots more 
prizes to give away: A voucher 
worth £50 for the overall winner to 
spend as you wish and TWENTY 
more vouchers worth £5 each for the 
next 20 best. 

Impact are also presenting £100 
for the best picture received with a 
school name on the entry form. 
You'll find entry forms in the August 
and September issues. 






B6HBWVWBBVBV 



(ejwjpejWvVQVvvvwwi 



4 LETS COMPUTE' October 1990 







Many congratulations on what would appear to be an excellent computer 
magazine for children! It's full of ideas for learning about IT that can be 
easily transferred to classroom situations. 

Would it be possible for us .to photocopy some of the material for use in 
school? Perhaps we could provide you with some field research in return. 

I was also wondering if you did any special promotions for schools I feel 
that your magazine is one that we could promote in school to the benefit of 
our own pupils. 

- Arnold Marchant, Boldmere Middle School 

We've received many letters like this from schools wanting to 
boost their funds. As always, LeVe Compute! does what its 
readers want. 

So, we'll give £1 for each subscription a school gets for Let'* 
Compute! For more details, write to Pete Davidson. 

All the material in Let s Compute! is copyright and must not 
be reproduced without written permission. Any school 
obtaining more than 10 subscriptions will automatically be 
given this permission. 

Thanks for the offer of field research. We value feedback 
from all sources. It's only by hearing what children and schools 
want to sea that we can give you exactly what you want. 



I have just had an idea for your comic: A high score table for games 
would be great! 

You could ask readers to send in their name, address, computer 
and the high scores they're reached . Then you could print them. It 
would give Let's Compute! readers something to compete against. 

- James Holiis (13), Wakefield, W. Yorks 

We'll be printing our first high score table next month. If 
you would like to see your name on lt v just fill in and 
send us the coupon below. Post it to High Scores, Let's 
Compute! Europa house, Adlington Park, Macclesfield 
SK10 4NP. 

We'll print the best. By the way, James. You didnt give 
us your full address. Remember that ALL writers of 
letters on the notlceboard receive a free baseball hat. 

Your hat's here waiting: Just send us your address. 

i- — — — — — — — — — — — — — _ _ __________ 

High score challenge 

a 
m 

Name 

***** * . • 

Address 



I am a Let's Compute! Club 
member and want to take part in 
the competitions. But I don't want to 
cut up my copy of the comic. 

Can I photocopy or draw the 
entry form myself? 

I find Let's Compute! easy to 
understand. There's only one word 
for it -BRILLIANT! 

- Laura Corney (13), Greenock, 

Scotland 

We don't mind how your 
entries are sent. But try to 
keep them about the same 
size as the ones we print. And 
make sure you tell us 
everything that's asked for on 
the original coupon. 

If you want to enter more 
than one competition you can 
send them all in one envelope. 

Just address it to Let'e 
Compute! Competitions! 
Europa House, Adlington Park, 
Macclesfield, SK10 4NP. 



I have just received my member's pack. I 
am very pleased with it, especially the 
software. 

However, I looked at Ihe ruler and 
decided to memorise which was Ram and 
which was Rom. On the ruler Rom wears 
the glasses, but in the first issue of Let's 
Compute! Ram has the spectacles. 

Could you please tell me which is which? 

- Simon Marwood ( 12), Richmond, 

North Yorks. 

Ram is the clever one with the 
glasses. Rom is rather thick, and 
always hungry. The cartoons are 
drawn by ace cartoonist Mike 
Goldberg and are therefore always 
right in the magazine. But when 
they were put on the ruler, 
someone got it wrong. 

Mike sent a special cartoon to 
the person who made the mistake. 
We're printing it here to help any 
readers who are at all confused 
between Rom and Ram. 



tfW 



r-iyee. 






Age 



Computer 

Game Score ... 

Game Score ... 

Game Score ... 

IjGame Score ... 




A 




Vie party season has 
arrived. And what 
better way to make a 




m 



veen party 



yomr-fioww 
fizz than to prepare 
an wmual cocfaail 

of firm fa? 



Here's a program that 
gives you a few ideas of 
what you could mix with 

what. 
But once you've created 

your tasty concoction, 

what do you call it? 

The program itself 
comes to your rescue. 
Along with the list of 
suggested ingredients you 
also get a name. 

As it's one made up by 
your computer it may look 
strange. And you may 
have trouble saying it. So 
be warned: With some of 
them you may tie your 
tongue in knots trying! 

Now type it in - and have 
fun! 

6 LETS COMPUTE' October 1990 




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How to make a Zuno 

2 Measures of Apricot juice 

3 Measures of Pear juice 
2 Measures of Bitter Lemon 
1 Measure of Soda Water 

add some lime peel 
add some dried peaches 



add some fresh pineapple cubes v$S?- 




•*« 




Is YOUR machine here? 



n* 



10 REN The Witches' Brew 




T "h"; 


20 (tEn (C) Let's Coipute! 




450 GOSUB 580 


30 DEF FNr(n)=RND(n) 




460 PRINT vS; . 


40 LET ul="aeiou" 




470 IF FNr(15)<2 THEN GOTO 450 


50 LET v$="" 




480 LET R=FNr(21):PRlNT AID$<c$,R,1); 


60 LET c$="bcdfghjklipqrstv*xyzn" 


490 IF FNr(15)=1 THEN PRINT NIDS(c$,R, 


70 DIM dl(3,50):DIN x<3) 




1); 


80 FOR A=1 TO 3:LET N=0 




500 IF R=12 THEN LET v$="u":PRINT v$; 


90 LET MH*1 




510 IF R=1 THEN IF FNr(20)=1 THEN PRIN 


100 READ dS(A / H> 




t V; 


110 IF d*(A, «)<>"" THEN 60T0 90 


520 IF R=2 THEN IF FNr(2)=1 THEN PRINT 


120 LET x(A)=N-1:NEXT A 




"k"; 


130 LET DUNHY ■ RND(-TIBE) 




530 IF R=15 THEN IF FNr(9)=1 THEN PRIN 


U0 CLS 




T "h"; 


150 PRINT "WITCHES' BREW" 




540 IF R<>12 THEN IF FNr(15)=1 THEN PR 


160 PRINT 




INT "r"; 


170 PRINT "Ho* to lake i ■; 




550 If FNr(5)<4 THEN 60T0 450 


180 GOSUB 400 




560 IF FNr(9)<5 THEN GOSUB 58*: PRINT v 


190 PRINT 




$;:IF FNr(15)=1 THEN PRINT "r"; 


200 FOR C=1 TO 3 




570 PRINT: RETURN 


210 GOSUB 270 




580 REN FIND A VOWEL 


219 NEXT C 




590 LET xS=v$ 


230 PRINT 




600 LET P=FNr(5> 


240 PRINT "Press a key for i 


mother drl 


610 LET vSMID$(mS,P,1) 


fl 




620 IF vS=xS THEN 60T0 600 


250 LET AI ■ GET 




630 RETURN 


260 GOTO 140 




640 REN Soft Drinks 


270 REN SORT OUT WORDS 




650 DATA "Leion juice", "Apple juice"/ 


280 LET LD=0 




Pineapple juice'/Toiato juice" 


290 LET T=FNr(3) 




660 DATA "Apricot juice", "Orange juice 


300 LET R=x(C)-LD 




", "Nixed fruit juice", "Liie juice" 


310 LET D=ABSCFNr(R+2)-FNr(R))+1+LD 


670 DATA "Vlaito cordial", "Pear juice", 


320 IF 0>x(C) THEN GOTO 390 




680 REN Fizzy drinks 


330 IF C=3 THEN PRINT "and soie ";:60T 


690 DATA "Coke"/V1ito"/7 Up"/Leiona 


370 




de", "Bitter Leion", "Tonic Mater" 


340 PRINT " ";T;" Measure"; 




700 DATA "Ginger ale", "Soda water"/" 


350 IF T>1 THEN PRINT "s of 


■ > 


710 REN Floaters 


360 IF T=1 THEN PRINT ■ of 




720 DATA "orange peel M /ice cubes"/cl 


370 PRINT dt(C,D) 




oves","leion peel"/liie peel" 


380 LET LD=D:G0T0 290 




730 DATA "cherries'/crushed ice"/app 


390 RETURN 




le slices"/raisins"/dried apricots" 


400 RER FIND AND PRINT NANE 




740 DATA "dried peaches"/fresh pineap 


410 LET R=FNr(21) 




pie cubes"/orange slices" 


420 PRINT CHRS<ASC(NID$(c$,li 


!,1))-32>; 


750 DATA " 


430 IF R=12 THEN LET vS="u": 


PRINT v$; 




440 IF R=15 THEN IF FNr(5)=1 


THEN PRIN 





BBCMicro/Archimedes/Electron 

The listing works as shown 

Am s trade PC I Spectrum 



Change the following lines: 

30 DEF FNr(n)=INT(RND*n*1) 
130 RANDOMIZE TINE 
250 WHILE INKEY$="":WEND 



C64/128 

Enter the program in capitals. 
Change the following lines: 

30 DEF FNR(N)=INT(RND(0)*Nt1) 
140 PRINT CHRSC147) 
250 6ET AS:IFAS="" THEN GOTO 250 
420 PRINT NID$(CS,R,1) 



Use 48k mode. 

Change the following lines: 

30 DEF FNr(n)=INT(RND*n*1) 

70 DIN d$(3,50,22>; DIN x(3): DIN sS(22) 

110 IF dS(A,H)o""sS THEN GOTO 90 

130 RANDOMIZE 

250 PAUSE 

310 LET D=ABS (FN r(R+2)-FN r(R))*WLD 

420 PRINT CHRS (CODE (c$(R))-32); 

490 IF FN r(15)=1 THEN PRINT c$(R); 

610 LET vl=«$<P) 



STstos, /Amiga 



(Amos) 



PC 



(GW-Basic) 



Change the following lines: 

30 DEF FNr(n)=INT(RND*n+1) 
130 RANDONIZE TIMER 
250 WHILE INKETS= NH :WEND 



Change the following lines: 

30 HODE0:HIDE 
130 LET a=RND(TIHER) 
250 WAIT KEY 
290 LET t=RND(2)*1 
310 LET D=ABS(RND(R*2)-RND(R))+1HD 
600 LET p=RND(4)+1 

AMOS: Use CLS Instead of NODE0 



LETS COMPUTE! October t990 7 



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YOU could be one of the first people to own the 
very latest sensation from Commodore - the top 
selling Amiga 500 with an EXTRA 512k memory 
booster. 

That turns it into powerful 1Mb machine. It will 
introduce the wonders of the Amiga to many 
thousands of new users during the next few 
months. 

For the package, Class of the 90's - First Steps - 
comes complete with a host of valuable extras: 



• ProWrite 2.5 - a word- 
processor that includes colour 
and graphics to let you to 
design you own pages 

• O-Paint II- a creative paint 
package 

• O-Print - a design program 
for you to make your own 
greetings cards and posters 

• InfoFile - a database 
where you can store information 
and pictures 



• MusicMouse - start learning 
to make wonderful music 

• Logo - your very own version 

• Talking Turtle - you can 

program your Amiga whatever 
age you are 

• Let's Spell at Home - 

helps you to spell by using 
pictures 

• BBC Emulator - use it to 

run the BBC Micro versions of 
programs in Let's Compute! 



WHAT TO DO 

We are looking for the person who can make 
the most words out of the letters in these two: 

COMMODORE AMIGA 

Write down all the words you find on a 
separate piece of paper. Then attach it to the 
entry form and send it to Let's Compute! 
before October 31. 



AMIGA CONTEST ENTRY FORM 

I found words 




PLUS 



• A video to teach you how to set up your new Amiga, 
use the programs and what to do next 

The monitor m the picture « not included m the prize The computer wtfl wort wfff> an ordinary television 



1 



Name 



Address 



Postcode 



Tel 



Age 



My present computer is a 



i 

I 

Now send this to: Commodore Competition, Let's Compute!' 
Europa House. Adlington Park. Macclesfield SK10 4NP. 






LETS COMPUTE' October 1990 9 







BBC & ELECTRON 



TTTLE BBC Of BBC CPCT 

Electron tape disc disc 

A Question ot Sport 195 10.50 14.95 

Arcade Soccer 9.95 12.95 

E-Type 9.95 14.95 

Elite 8 95 10.50 15.95 

Exile 8.95 10.50 15.95 

Hostages 7.95 9.95 11.95 

Mo*ed Om 12.95 14.95 

Wax {B8C only) 7.95 11.95 

last Nm»a 2 7.95 9.95 11.95 

Perplexity 7.95 9.95 11.95 

Pipemania 7.95 11.95 11.95 

Predator 6.95 8.95 10.50 

Repton Infinity 8.95 10.50 15.95 

Superior Soccer 7.95 9.95 1195 

Sporting Tnangto* 7.95 9.95 

Tanh Attack 8.95 11.95 

Ricochet 6.95 8.95 10.50 
Ptay It Again Sam Compilations 1 to 10 (each): 

6.95 8.95 10.50 
Play ii Again Sam Compilations 11 to 13 (each): 

7.95 9.95 11.95 

Superior Coll (BBC only) 6 95 8.95 10.50 

Superior CcJ2(BBC only) 6.95 8.95 10.50 
Superior CcJ3(Ele only) 6.95 

Call or wnte to ask for a full catalogue 
stating which computer you have - its FREE! 



JOYSTICKS 



For the BBC. 0+, Master 128 & Electron Plus 1 

Competition Pro (15 pin) £19.95 

Arcade quality micro switches, 8 directional 

control, 2 fire buttons on base. 
Superpro Auto (15 pin) E13.95 

Arcade quality micro switches, 8 directional 

control, triple action auto-fire and suction pads. 
Delta 3B Twins £19.95 

2 analogue, light spring action.wired to one plug 
Delta 3B Single £13.95 

Analogue, light spring action joystick. Can be 

used as either left or right-handed. 
Harrier £4.95 

Fire button on control handle, push bar fire and 

suction pads 

Delta Cat (For Archimedes) £26.95 

Or mouse eliminator. Light spring action. Will 
operate mouse-driven software such as Zarch. 
Quickshot II Turbo (9 pin Atari type) £1 2.95 
Competition Pro (9 pin Atari type) £19.95 




Mercury Games 




Software for the BBC Micro, 
Electron, Master Compact, 
Archimedes, IBM compati- 
bles and 16 bit machines! 






V* 







BBC/Electron tape SRP £9.95 
BBC 5.25" disc SRP £12.95 
Archimedes disc SRP £19.95 
Atari ST SRP £19.95 

Amiga SRP £19.95 

(Ait prices tre p*r age 




Offer price £7.95 I 

Offer price £9.95 

Offer price £15.95 

Offer price £15.95 

Offer price £15.95 

ring*) 



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(Due tor release November 1990) 

Archimedes disc SRP £24.95 Offer price £19.95 

(Due for release December 1990) 

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(All price* ere per age range: advance order* taken) 



AMIGA I ATARI ST 






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Amiga Mouse £29.95 
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Protext £79.95 

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Amiga 500 £3.95 



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Mouse £29.95 
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Plus £59.95 

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Full catalogues now available for BBC, Master Compact, 

Electron, Archimedes and IBM compatible computers. 

Please state which machine you have. Great discounts guaranteed! 
DETAILS OF ALL NEW RELEASES FOR CHRISTMAS! 




PRINTERS 



Full specifications are 
available on request 



Panasonic KX-P1081 

Panasonic KX-P 11 80 
Panasonic KX-P1 124 
Seikosha SP-2000 
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9 pin dot matrix 
9 pin dot matrix 
24 pin dot matrix 
9 pin dot matrix 
24 pin dot matrix 



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a -I 




STOP THIEF III 

Gadget Shop proprietor 
Mike Cook shows how 
his computer is 
linked to the 
outside world - 
to keep out 
unwanted 
visitors 




■U 






vr 






- -■ 



* 






a 



The program and computer terms used in this 
article relate to Acom micro*. Readers wtth 
an Amstrad CPC, Commodore 64; 1 28, Spectrum, 
Atari ST or Amiga who order a Gadget Shop pack 
will be sent complete instructions appropriate 
to their machines. 



There are lots of 

ways of making burglar alarms. In the 

Gadget Shop this month we'll see how to 

turn your computer into an electronic 

watchdog. 

And you needn't stop at burglar 
alarms. The switches we're going to use 
can just as easily perform other jobs. 
Such as keeping a check on the position 
of a model train. Or as the keyboard of a musical instrument. 

The link to your computer is through a connector strip. Remember 
we made one at the start of this series. Let's see what else we will 



Using this type of connector our computer can only detect If 
something Is switched on or off. What we have to do is to get our 
intruder to do this with some form of invisible switch. 

A reed switch Is ideal. It uses two contacts sealed In a glass 
envelope. When we bring a magnet close to it the contacts move 
together and complete the circuit. 

All we need do is mount a magnet on a door and a reed switch on the 
door frame. These must be placed so that when the door is closed the 
magnet is next to the switch. The magnet pulls the two contacts 
together and the switch is ON. 

When the door is opened the magnet moves away and the reed 
switch opens. Our computer will spot this happening and raise the 
alarm. 

If you are connecting your alarm to the User Port of an Acorn 
machine you have eight inputs and can monitor up to eight doors or 
windows at the same time. If you connect it to the joystick port of 
another micro you have five inputs. 

In fact you can alarm any number of doors or windows by Just 
chaining the switches together. In this way you'll know when one Is 
open. But not which one. J 

Other uses for the switches 

If you want to monitor the position of a model train put the reed switch 
near the track and the magnet on the train. The switch will close as 
the train passes over it. 

Or you can make a simple musical instrument by mounting eight 
switches in a row. If you connect them to your micro and write a short 
program you can play tunes by waving a magnet over the switches. 

There are lots more uses for this type of switch. For example you 
could design an electronic game. 

Let us know if you make anything unusual from these 
switches - there will be a prize for the brightest idea. 








IN THE SHOP SOON: UNIQUE ELECTRONIC GAMES 



Which switch do you need? 



On offer this month are three different 
types of reed switch and magnet. They're 
all mounted in white PVC cases and fixed 
in place with screws or nails. 

The surface mounting set can be used 
for windows as well as doors. The two 
recessed sets - one large and one small 
- are best tor doors. The diagram shows 
how to wire them up and the photographs 
show them fitted. 

You can connect several different 
switches to one computer. Just copy the 
wiring diagram fpr each one. 

Any unused inputs should be 
wired directly to the earth 
connection • 

The listing given is for a BBC Micro. It 
is a simple program to monitor the 
switches and raise the alarm. You can 
use it as a basis for your own routines. 

Remember to make the modifications 
shown below if you are using an Electron 
or Archimedes. 

Modifications for the Spectrum. CPC, 
Atari ST and Amiga are supplied with 
Gadget Shop Pack 2 - remember to state 
which computer you are using. 

WARNING 

Keep the magnets 
in the contact 
sets away from 
your discs. 
Magnetic fields 
can damage 
programs stored 
on them. 




Alarming a door on Pin and two on Pin 



10 HODE 7 

20 PftlNT"The Gadget Shop Intruder AU 



n' 



30 REPEAT 
40 CZ=1 

50 PRINT TABU, 4) 
60 At=?lFE6« 

70 fOR b:=« TO 7 

80 IF (CI AND AX)=0 THEN PRINT'Locatl 
on ";BZ;" is s«fe';$PC<1l) ELSE PRINT"In 
truder at Location ";BZ 
90 U*CP2 
100 NEXT Bl 

110 If Ai<>0 THEN SOUND 1,-15,20,1:500 
ND 1,-15,101,1 
126 UNTIL FALSE 

BBC listing - see text tor other computers 




The three types of contact you can get from The Gadget Shop 



^ 





IS THIS YOUR COMPUTER? 



BBC Micro: Use the program above. 

Archimedes and BBC A3000: You 

need an i/o podule. The program also 
needs to be changed. 
Replace Line 60 with: 

SYS "OS Byte", 151, (60 TO ,,AZ 

Note that the two commas after the TO 
are essential. 

Electron You need a Plus One and 
User Port expansion - available from 
Pres (0276 72046). The game and 
program work as they are described 
above except that the memory location 



which is accessed by the User Port is 
&FCB0. So wherever you see &FE60 in 
the program you use &FCB0 

t 

Spectrum: You need an Interface 1 
and the gadget connects to the joystick 
port*. 

Amatrad CPC, Commodore 
64/126, Amiga and ST: The gadget 
connects to the joystick port*. 

* The full assembly instructions are in 
Gadget Shop Pack 2 The short Basic 
routine to operate the gadget will be 
supplied when you order it. 



V 



mm 

'mm 



Make a gadget that 
tests how good you 
are at shaking a 
sauce bottle! 

Why ever should 
you want to do that? 
Well it could turn 
out to be a super 
electronic game! 

Find out what it s 
all about in Let's 
Compute! next month. 








ORDER FORM 



Pack 2 - Reed switch sets 

This contains all the bits you need to 
make your burglar alarm except for 
the connector cable. This is still 
available, and you can also use this 
order form to get one. 

□ Surface mounting reed switch 
plus resistor £2.60 
Recessed round type plus 
resistor £2.70 

Recessed square type plus 

resistor £2 60 
You'll also need Pack 1 - the 
User Port connector ceble: 

□ 20 way IDC plug, length of 20 
way ribbon cable. 12 way chock 
block, cardboard base. 2 foam 
sticky pads PLUS 2 spare 
connectors and a resistor £1.99 

□ As above but with IDC plug 
ready connected ...£2.49 

□ As above but with connector for 
Master Compact in place of IDC 
plug ...£3 99 

□ As above but with connector for 
joystick port of Spectrum, 
Amstrad CPC .Commodore 
64/128. ST or Amiga in place of 
IDC plug Basic program and 
instructions will also be supplied 
.. £399 

Please state your type of computer. 



Educational establishment orders 
accepted 

c * Make cheque* payable to 
Musbury Consultants and 
send to: Musbury Consult' 
ents, 8 Fairhill, Helmshore, 
Rossendale, Lanes BB4 4JX 



Name 



:.' 



Address 



Post code 



> AUTO MONEY BOX e WEATHER STATIONS 



LETS COMPUTE.' Cciober 1990 U 



This Is the original program: 




I 





* 



There's always a better 

way of doing things, and 

here's another program just 

waiting to be operated on. 

Our resident micro medic 

diagnoses several 

shortfalls. 



II PRINT "This is all the program does. 

21 PRINT "Do you Mint to finish?(Y/N>" 

31 k$=6ETS 

if IF k$o"Y" THEN RUN 



How the Doc altered it: 



1 REM Iff Program Doctor III 

2 REA 9U Version Two »tl 

II PRINT "This is all the prograi does 
21 PRINT "Do you want to f ini sh?< Y/M>" 
31 k$=GET$ 

41 IF k$o-Y- OR k$o"y" THEN RUN 
SI PRINT "Goodbye then" 



IS YOUR .MACHINE HERE? 

Electron/BBC/Archimedes 

The programs work as shown 

CPC/PC (GW-Basic) 

Replace k$=GET$ with. 

K$="": WHILE K$="-:KS=INKEr$:MEND 

Commodore 64/128 

Enter the program in capitals 
Replace fcl*6ETS with: 

SET K$:1F KS*" THEN 40T0 30 

Spectrum 

Select 48k mode 
Replace ks=6ET» with: 

«=INKEYJ:IF W»" THEN 60T0 30 

Amiga and Atari ST 

Use Amos or Stos 
Replacement withkU\H?\ju\) 



\ 




►member all those games 
rograms where, having 
lost all your lives all too 
ckly, the micro offers 
ou a chance to play the 
? Well, that's what the 
gram at the top of the page does. It 
prints out a simple message until you press N to finish. 
Recognise the standard question: 

Oo you want to finish?{Y N) 

Actually all that happens is that line 40 tests wether Y 
was pressed. If it wasn't it RUNs the program again. If 
you pressed any other key - including a small y - the 
program ends. 

But we can do a much better job. The second program 
shows how. 

Here are improvements that have been made: 

• You should always test for lower case letters as well 
as capitals - y as well as Y. That's what the OR is doing in 
the new Line 40. 

• It's also polite to let the user know that the program 
has ended. So Line 50 is there to round things off. 

Those are the programming changes. But you might 
notice something else - put in to make the program 
easier to read. 

It now starts with two lines of REMs. These don't affect 
the way it runs, but they act as a useful signpost. They 



tell you things like which version of the program it is and 
so on. Still, things could be even better. At the moment, 
any key except Y or y will repeat the program, despite the 
fact we've asked for a yes or no answer { Y/N). 

There is one way round this. Just add another IF ... 
THEN. Put in the following line and you've got a much 
more friendly program: 

45 ! f UoT OR kS<>V THEN SOTO 31 

All right, the main part of the program does nothing 
except print a bit of text. But the point is that WHATEVER 
someone types it is dealt with properly now. 

The program caters for every input so there can be no 
freak happenings when someone presses X, say. And 
that's what makes a more polished job. 

These routines will work - with the small changes 
listed - on most home micros. But there are more elegant 
ways of doing the same thing. 

The snag is that you need to use different commands 
for different micros. 

For example, on the BBC Micro you can use the 
command INSTR as part of your check for which letter 
was pressed. 

On Page 9 of the August issue of Let's Compute! the 
green part of the listing shows this. 

If you can write a super sophisticated bit of program to 
check for a Y/N reply on your micro, let us see it. 

We'll pin the best to the Noticeboard aw* 



73*mi> 






H C 




Software 
giants 

US Gold and 
Ocean have 
got together 
this month to 
offer a deluge 
of goodies. 
And they're 
ONLY for readers 
of Let's Compute! 



There ai 

185 prizes 

to be won in 

this great 

prize bonanza: 

Pens* 

Badges • 

T Shirts * 

Balloons * 

Keyholders * 

Baseball caps * 

PLUS, for those 

winners who 

have a CPC, C64, 

Atari ST, Amiga or 

r Spectrum, there 

are 10 copies of Ocean's 
superb Midnight Resistance 





ENTRY FORM 



■ 



Questions *;« vv :v > 



1 Kylie first appeared in which TV 
soap? 

a Home and Away 
b The Young Doctors 
c Neighbours 

2 Which country saw the first kites? 
a China 

b USA 
c France 



3 From which tree do we get conkers? 
a Horse Chestnut 

b Oak 
c Yew 

4 Which building did Guy Fawks try to 
blow up? 

a Buckingham Palace 
b The Houses of Parliament 
c 10 Downing Street 




My answers 
Name 



.□ ,□ ,□ .□ 



Address 



Postcode 



I 
I 
I 

I 

x 



My computer is a 

Send to 

Bonanza Competition. Let's Compute!, Europa House. 

Adlington Park, Macclesfield SK10 4NP 



Age 




This month's program is all about the 
scientific way off using pressure to do Bn 
everyday job. The program examines how the 
kind of jack used in garages for lifting up cars 
works. 

It's really just a couple of cylinders Joined 
together by a narrow pipe. 

Each cylinder has a well-fitting piston 
inside it and the whole thing is filled with 
fluid - usually oil. So if you push down on one 
piston the oil passes the pressure produced 
on to the other cylinder, which moves up . 

The clever part of the whole arrangement is 
that you can lift big weights easily if you 
choose the right size for your cylinders. 

In the program you can change the size of 
either cylinder and see what happens. You 
can also alter the weight of the car you lift - 
scientifically known as the load - and how 
hard you push - the effort. 

You may notice that units aren't mentioned 
in the program. They could be anything but, if 
you prefer, just think that lengths are in 
centimetres and forces and weights are in 
newtons. 

The program works well, but has been kept 
as short as posible. If you are a programmer 
you could enhance It yourself. 

For example, there's a procedure called 
PROCtap that checks for you pressing the 
spacebar. It was given that name because it 
was going to draw a tap in the pipe between 
the two cylinders - the tap would open when 
the spacebar was pressed. 

PROCtap was shortened to reduce the 
length of the listing, but you could write your 
own. 

You could also give the pipe a more unusual 
shape - machines like this will work even if 
knots are tied in the pipes. Also sound could 
be added. 

Alter the program to suit yourself and use it 
in any way you like. 

Just remember one thing. Science is meant 
to be fun, so start experimenting. 

16 LETS COMPUTE! October 1990 



21 REN By the Site Scientist 

31 UN (c) Let's Coipute! 

4f «QDE6:YHJl9,M;|;:M0Cinstruct 

51 •FIH,! 

61 BZ=8l2l2IA:PIQCsetup:REPEAT 

71 PtQCsetup:REPEAT:N0DE6 

II R0DE6:VDU23;82I2;M;M; 
91 lh:=5M:ehZ=5M:PROCaltervirs 
111 PR0CaLtervars:NQDE1 
111 «0«1:V0U23;82I2;I;I;I;I; 
121 PR0Cdra*press:PR0Cload(1) 
131 PROCtap:PROC«oriout:UNTIU:END 
141 OEFPROCsetup 

151 U=1MI:eZ=5M:UZ=2U:elX=1M 
161 LhZ=5M;ehX=5M 
171 VDU23,224,3, 4,8,63,127,255, 255,48 
181 VDU23,225,24|,136,132,254,127,127, 

255,12 
191 carl=CHR$224KHRS225 
211 VDU23,226,l,f,M,24,24,24,24 
211 VMI23,227,24, 24,24,24,255, 126,61,2 

4 
221 arS=CNRS226+CHRS8*CtiRS1ftCHRS227 
231 DEFPR0CdriMpress:GC0Ll,1 
241 N0VE2M,2H:MAV1»I,2M 
251 R0VE2M,2lf:DRAU2ll,7ll 
261 R0VE1MI,2«l:DMHlfH,7M 
271 NQVE2IMlZ,3ll:MAtMIM-elZ,3M 
281 R0VE2lltllZ,3H:DUU2fMtZ,7H 
291 H0VE1MI-elZ,3H:»A«1HI-elZ,7« 
311 6C0LI,2 

311 N0VE2»4,UX:DRAlM96*UZ,lnZ 
321 H0VE1H4-eLZ,5ll:DRAV996,5H 
331 ENDPROC 
341 DEFPSOCtoad(cZ) 
351 (C0LI,cZ:VDU5 

361 N0VEl68*UZ/2,lhZ*36:PRUTcar$ 
371 N0VE984-elZ/2,ehX«76:PRUTar$ 
381 VDU4:ENDPR0C 
391 DEFPROCtap 

411 PRHmAB(4,3l);"Press Spice to see 
what happens" 
411 REPEATUNTIL1NKY-99 
421 PRINTT*B(4,3l);SPC<31) 
431 ENDPROC 
441 KFPIOCMorkout 

458 »H15,I 

461 H=PPUlZ/2)*2:ea=PI«(tlZ/2)*2 

471 lp=tZ/la:ep=eZ/ea:st-lp-ep 

481 IF st<MH1 AND st>-MH1 Iff 

491 IFst>l NZ=-1 ELSE IF st=l NZ=I ELS 

E «=1 

5H ei=la/ea«NI 

511 PRINTTAB(4,1)-LOAO-TAB(3l,1)"EFF0R 







V 

521 PRINTTAB(17,3) tl UEUNT M TAB(12,S)"ri 
5T0N DIAREUfTABtH^J-PISTOR AREA" 

531 PRINTTAB(4,3>;lZTA8(3«,3>;eZ 

541 PIUTTAB(4 / 5);UlTAB(3l / 5);elX 

551 PRUTTAB(4,7);Li TAB(3l,7);e* 

561 REPEAT:PROCloid(|) 

571 lhZ=lM*RZ:eh:=eh:-ei 

581 PR0CLoid(1):GC0Ll,2 

591 H0VE2l4,lhZ:DRAlM96*llZ,UZ 

611 H0VE996,ehZ:DRAll1H4-eLZ,ehZ 

611 6C0LI,! 

621 H0VE2l4 # LhMlZ:m«196Mi: / lh:-li: 
631 NQVE996,ehZ»ei:DRAyiM4-ei:,ehZtei 
6M UNTIL ehZ>7« OR ehZ<3H OR lhZ<30 

OR rim 

65t GCOll,2:flOVE2f4,LhZ:DIIAV196*UZ,lh 

Z 

661 R0VE996,ehZ:DRA¥lM4-elZ,ehZ 

671 IF RZ=-tP«lNTTA8(2,27)-The car Is 
too heavy for the effort," 
681 IF HZ=1PRINTTAB(2,27>-Tlit effort h 

as lifted the car.' 

691 IF «=iPRIHTTAB(H,27)-BALA«ED!' 

711 PRINTTAB(2,3l)"Pre$$ Space to cont 
Inue." 

711 REPEATURTUimr-99 

721 ENDPROC 

731 DEFPROCinstruet 

741 PRHTTAB(12,1)-A HYDRAULIC JACK"TA 

B(t2,2> 

751 PRINT"-A hydraulic jack is used t 

o lift a car, ""The jack has two cylinde 
rs which are" '"linked. Inside each cylin 
der there""is a piston. The car rests o 
n one""piston. Effort is used to push o 
n""the other." 

761 PRIHT'-Tou can alter the sue of e 
ach piston'*'and cylinder, the weight of 
the car" ' "and how hard you push." 

771 PRIHT'-Soaetiies, all of the force 
< will""bilince and the car won't love 
up or""down. Try to find out why this h 
appens." 

781 PRINTTAB(2,22)'Press Space to star 
t" 

791 REPEATURtTILlNKET-99 

811 ENDPROC 

811 DEFPROCaltervars 

821 ^115,1 

831 PRINTTABdl^KCHANGE THE VARIABLE 
S"TAB(1I,4) 

841 PRINTTAB(2,6)"ieight of cir"TAB<2, 
8)"Effort-TAB(2,l»)'Diaieter of load pis 
torTTA8<2,12)*Dii«ter of effort piston" 

851 PRINTTAB<2,22>"Preis Return when r 
eady" 

861 PRINTTAB(2,18)"Press Space to sele 
ct" 

871 PRINTTAB(2 / 2l)"Press < or > to cha 
nge* 

881 15=6 

891 REPEAT 

911 PRINTTAB(3l,6);lZTAB(3l,8);eZTAB<3 
l,1l);llZTABl3l,l2);elZ 

911 IF INKET-99 1I=XI+2:IF XZ>12 HM 

921 IF IZ=6 AND IRKEY-1R3 AND IZ>1M I 
Z=IZ-1II 

931 IF XZ=6 AND UKET-114 AND IZ<5IM 

IWMM 

941 IF XZ=8 AND IRKET-1R3 AND eZ>1M I 
MMffl 
951 IF XZM AND INKET-1I4 AND eZ<5fll 

eZ=eZ*1ll 

961 IF lZ=1l AND INCET-113 AND UZ>8l 
UZ=UZ-1I 

971 IF 11=11 AND INKET-1I4AND HZ<3lf 
IU=UZ*1I 

981 IF U=12 AND INKET-113 AND elZ>5l 
elZ=elZ-1l 
991 IF IZ=T2 AND IHUMI4 AND elZ<3ll 
llX*tlMI 

1MI PRINTTAB(3I / H);SPC(9) 
1111 TIRE=I:REPEATUNTILTINE>5 
1121 UNTILINKET(I)=13 
1131 ENDPROC 




National Cu 
Attainment 



urn 

Its covered 



This program covers loads of thos< 
science attainment targets that all young 
scientists are working towards on the 
National Curriculum: 



Target 


Title 


Levels 1 


AT1 


Exploration of Science 


2.3.4.5,6 and 7 I 


AT10 


Forces 


2,3 and particularly 6 1 


AT13 


Energy 


3 and particularly 6 1 


AT17 


The Nature of Science 


5 1 




See If you can find 
how to balance 
the system so that 
the car goes 
neither up nor 
down. Don't just 
find one case 
see if you can find 
a pattern in what 
happens. 

If you do well 
you should be able 
to say what the 
result will be no 
matter what 

weights and sizes 
are involved. 

Incidentally, it's 
a good idea to 
work with a friend 
so that you can 
talk over your 
theories and swap 
ideas. 



19 LETS COMPUTE! October 1 






Part 2 





The brain of a computer is called the CPU - which stands for Central 
Processing Unit. But before it can start working things out for us we 
need to put some facts and figures into it. 

So this month let's look at how information gets from the outside 
world into our minature electronic world. This is usually done using a 
keyboard. 

The technical term for what you feed into a computer is data. And the 
keyboard is only one of many things we can use. 

It can be done in many other ways. 

You may have a mouse or a joystick. When you're using them you're 
also feeding information into the computer - just as when you're using 
a keyboard. They're all input devices. 

You can use a connector called a Midi interface to link a musical 
instrument to your computer. The instrument is then an input device for 
the computer. 

And there are still more - tracker balls, light pens and scanners. 

They all have one thing in common: They take information and turn it 
into electrical signals which represent numbers. 

On the very first computers the only way to feed data in was through 
a row of switches. Turning them on and off in certain patterns sent 
information to the CPU. Now computers are much easier to use. They 
are said to be more user friendly. 

But if you think the old idea of switches has been replaced by the 
keyboard think again. For this is still only a lot of switches - pressing a 
key just turns on a few at a time. 

A keyboard is a rather slow way of getting data into your computer. 
It's much faster if you use a a tape recorder or disc drive. 

These take data that has been stored as a magnetic pattern and 
change it into electrical pulses. 

The CPU can read these pulses and carries out the coded 
instructions that they make up. Whether it's just a single letter or a 
complete game, the data reaches the CPU in pulses. 

What it does with them will be revealed in the next 
month's Let's Compute*. 







\ 



Keyboard 

Pressing a key sends a 

coded number to the 

CPU. For example, 

W the letter A is 

sent as the 
number 
65. Each 
key has a 
different 
number - called 
it's Ascii code - 
between and 25S. 






Joystick 

Most joysticks 

contain five 

switches 

one for each 

direction and 

one for fire. 

Whenever a switch 

is activated it sends ^ 

number to the CPU. 

Diagonal movements are detected if the 

numbers add up to the same as two single 

movements. 



20 LETS COMPUTE' October 1990 



■SSI 



■ 










s 









BINARY BITS 



We count in Tens and Units. It 
works well - we can use our 
fingers (and thumbs) to count 
on. 

But a computer works with 
switches and electrical 
pulses. They're either on or off, 
there or not there. 

It's as if a computer has to 
count using only two fingers. 
So it uses Twos and Units. 

Just like the way we count 
has a name - the decimal 
system - so the computer's 
way also has a name. It's 
called the binary system and it 
uses just and 1 . 

When a switch is off it's 
called 0. When It's on it's 1. 



Here are the numbers from 
one to seven using binary 
numbers: 

1 10 11 100 101 110 111 

It looks impossible to under- 
stand, but it's really easy. 

Suppose you were told to 
count up to seven weeks using 
just zeros and ones. 

All you have to do is count in 
weeks, fortnights and months. 
The table below shows how 
you can think of it. 

So now you can already 
count up to seven in binary. In 
next month's L&t's Compute! 
we'll go further along this 
clever road of counting. 



months 


fortnights 


weeks 








1 


So 1 = 1 week 




1 





So 10 = 2 weeks I 




1 


1 


So 1 1 =3 weeks I 


1 








So 100 = 4 weeks 1 


1 





1 


So 101 =5 weeks 1 


1 


1 





So 110 = 6 weeks 


1 


1 


1 


So 1 1 1 = 7 weeks 1 



Counting 
up to 7 
in binary 



Mouse 

A lot of 
computers 
now have a 
mouse as well 
as a keyboard. 
It just converts move- 
ment in any direction into 
pulses which are decoded by 
the CPU. 




Scanner 

A scanner 

converts a 

picture on 

paper into an 

electronic image. As 

the scanner passes over 

the picture small electronic switches turn on 

and off depending on whether light or dark 

areas are detected. 



NEXT MONTH: We look at how the CPU does its tricks! 






LET$ COMPUTE' Octooer 1990 21 





24 Hours Orderline 
0597 87 784 



. . . for prices that appear to have fallen off the back of a lorry 



AT-286-12 COMPUTER 



1 2 MHz Speed 

512KB RAM. Space up to 40Mb 

2HD/2FD Controller 

5.25" 1.2Mb Disk Drive 

Hercules Mono Card 

Parallel and Serial Ports 

Space tor 3 extra Drives 

Enhanced Keyboard 

12" or 14" Monitor 

1 year wananty RTM 

OUR PRICE £595 

SUPER AT+ 

AS ABOVE WITH 1 Mb RAM 
20Mb HARD DISK 

OUR PRICE £795 










MICE 



Tecklink inc. Image 72 £29.99 

Aero Mouse inc. Dr Halo £29.99 

Aero Trackball inc. Dr Hak) £35.99 

Above Inc. Software & Accessories 

Atari Mouse £17.99 

Amiga Mouse £19.99 

Amstrad 1 51 2/1 640 £9.99 



DATA SWITCHES 



FOR USE WITH ALL COMPUTERS 

All metal case with rotary switch 

2-way 36 pin Cent £14.50 

2-way 25 pin D-Type £12.50 

X-over 36 pin Cent £19.22 

X-over 25 pin D-Type £18.22 



DATA CABLES 1 


IBM Parallel 2MTR 


£7.25 


25 to 25 M/M 2MTR 




25 to 25 M/F 2MTR 


£7.25 











BRANDED 
DISKS 




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70 3.5" DS/DD +80 cap. box £44.95 

All disks 1 00% certified & guaranteed 

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All boxes inc. lock and dividers 

25 5.25" DS/DD +100 cap. box £13.62 

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75 5.25" DS/DD +100 cap. box £26.28 

100 5.25" DS/DD +100 cap. box ,, ,£31.50 

All disks 1 00% certified & guaranteed 
All boxes inc. lock and dividers 





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14" Monitor Stand £13.99 

Universal Printer Stand £7.95 

Mouse Pocket £2.50 

Rigid Mouse Mat £4.50 

3.5" Library Case x 5 £4.75 

5.25" Library Case x 5 £4.75 



DISK DRIVES (External) 




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incPSU £69.50 

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All prices include VAT & P&P. UK orders only Telephone 0597 87 792 Fax NO. 0597 87 416 Educational and Government orders welcome 



i 



_ 



be one of 

the first to 

own one! 





• It will work on ANY computer 

• ANYONE can use it 

• It needs NO instructions 

• It is TOTALLY friendly 

But this is more than a piece of software, 
it's THE very latest computer add-on . . . 

I t's a C omputer Critter! 

There are four types of Critter - a rabbit, 
bear, bulldog and dragon. Each has a furry 
head, arms and legs - and the dragon 
even has a tail. These attach to your co 
puter by strips of velcro to become yo 
machine's cuddly guard and friend. 

Now you can adopt your own Computer 
Critter - with this special, money-savins 
offer from Let's Compute! 

Their shop price is £25 each. But we'll send 
you one for just £15 - a saving of £101 



These colourful, furry computer add-ons are beautifully 
made. They can be fixed to your monitor in seconds. 

They're all set to become the next big computer craze. 
Certainly you can expect to see a big invasion of them 
this Christmas. 

But the/re watting for good homes NOW! 

So the sooner you send off the coupon the sooner 
you'll have one standing guard over YOUR computer! 



Please send Computer Critter(s) at £1 5 each 

My choice: L Rabbit L Bear Bulldog Dragon 



3601 



360? 



3603 



3604 




I wish to pay by: 



Cheque Eurocheque made payable lo Database Publications LW 

E*p»ry 

AccessWaslefcard'Eu'OcafCiBafCiaycafoVVisaX^onect o*« 



/ 



Name 



Signed 



Address 



Postcode 



teytime telephone number in case of queries 



Send to: Database Direct, FREEPOST, Ellesmere Port, 

South Wirral L65 3EB (No stamp needed it posted in UK) 



Order at ANY time 
of the day or night 



Don't forget lo give your name. 

address end credit card number 



By phone: 051 -357 1275 

By fax 051-357 2813 

By MicroLink: MAG001 



General Enquiries. 051-357 2961 



AMowupto U days tor delivery 









Introducing 




Castle of 
Adventure 




Charlie's 
Cheats! 

Did you know that there Is a 
built-in cheat for CPC Treasure 
Island Dizzy? At the title screen 
hold down A P C and SPACE until 
Dizzy appears. If you then press 
C during the game and use 2 X K 
and M you can move from screen 
to screen. When you get to a 
screen you like press space and 
off you go. 



Watch out for Mirrorsoft's Cadaver. It's a 
role-playing game with a difference. 
Everything's joystick controlled so there's 
no need for boring typing in. 

You play a bounty-hunting dwarf 
searching a mysterious castle. It's stuffed 
with treasure, gripping puzzles and 
magical beasts. 

Solve all the problems and you might 
get to kill the Necromancer and become 
exceedingly rich. 

It's been programmed by the famous 
Bitmap Brothers. They're the team behind 
Speedball and Xenon 2. Due out shortly 
for the Atari ST and Amiga. 



Budget 
Bonanza 

Your pocket money doesn't stretch to full- 
price software very often? Don't despair - 
there are plenty of good budget games 
on the market. Some of the best are re- 
releases of old full-price classics. 

Among the best of this month's bunch 
are Encore's Ace and Ace 2 (£2.99). 
These two brilliant flight sims are rolled 
into one for the Spectrum, C64 and CPC. 

Conflict (£4.99), is a playable intro to 
wargaming. It's out on Virgin Master- 
tronic's 16-Blitz label for the PC. Amiga 
and Atari ST. 




24 LETS COMPUTE' October 1990 




BACK 
TO THE 
FUTURE 2 




Matt Browne from Potters Bar has come 
up with a poke for Alternative's Microball 
(BBC Micro and Electron). This blocks off 
all the holes so that the ball cant be lost. 
Just put your tape in the recorder and 
type the following: 

LOAD "PINBALL" 

160 GLS:PAGE=t1200 

RUN 

LOAD "LOADER" 

2007 fOR A=47C98 TO &7CDF:?A=127:NEXT 

2008 FOR A=*6AB0 TO 46ABF : ?A=1 26 : NEXT 

2009 FOR A=*6BC8 TO »6B07 : ?A=1 26 : NEXT 
RUN 



The eagerly awaited 

Back to the Future 2 

(Mirrorsoft £"14.99, 

disc) is now available 

for CPC owners. The 

gameplay is not bad. But the mono 

graphics in the main part of the game 

disappoint. 

It's nearly a year since Fighter Bomber, 
first appeared pn the PC. Now it's made 
it to the CPC screenson a £19.99 disc 
from Activision. 

It features welt produced 3D graphics 
amd mission objectives. A worthy 
successor to that old CPC favourite, After 
Burner. 

Do watch out though - some CPC 
owners may have a problem. The 
protection on the disc version prevents it 
from loading on some machines. 





Arc you £ liuUc Aiaiuc-c? 



Is there anyone out there who 
isn't a fan of Leonardo, Raphael, 
Donatello and Michelangelo? 

Those pizza-loving heroes in a 
half-shell are about to make their 
computer in a game from Image 
Works. 

First on the shelves will be the 



PC and Amiga versions. Others 
will follow except for BBC and 
Archimedes users. Seems like 
they'll be missing out. 

Teenage Mutant Hero Turtles is 
bound to be one of the hottest 
releases this Christmas. So get 
saving. Cowabunga! 



*iOOO 

Level -f Distance 4- 



PIPEMANIA 

Pam and her minions have been working 
hard on Empire's addictive puzzle game 
Pipemania. Here's the full list of 
passwords for the Amiga and C64. Can 
anyone help with the others'? 




Amiga 

Level 5. GRIP 
Level 9: TICK 
Level 13: DOCK 
Level 17 OOZE 
Level 21: BLOB 
Level 25: BALL 
Level 29 WILD 



C64 

Level 5: HAHA 
Level 9: GRIN 
Level 13: REAP 
Level 17: SEED 
Level 21: GROW 
Level 25: TALL 
Level 29: YALI 



Are you a follower of Fourth 
Dimension's Nevryon? Here are the 
Archimedes passwords as discovered 
by James Marshall and David Horner 
fromTollerton: 

Level 3: MIRADOR 

Level 5: ISENGARD 

Level 7 KRYNN 
Mathew Elliot from Royston has 
supplied the passwords for the BBC 
Micro version: 

Level 3: ARCHIE 

Level 5; STEREO 

Level 7: REBEL 




f you've got any hints, 
okes or cheats you'd 
ke us to print send 
lem in to us at Let's 
ompute! Europa 
louse, Adlington Park, 
icclesfieldSKKMNP. 



Think you know a lot 
bout pop music 
e's a program 

'est you out 





If you fancy being a quizmaster - now's your chance! 

Clever Tina Turtle has devised a Pop Quiz you can play 
on your computer. And she's made it easy for you to 
change It Into any type of quiz you like. 

After you've typed in the program and RUN It you'll be 
asked 1 questions. Get one right and you move on to 
the next. 

If you get one wrong, you'll be given the right answer 
before you move on to the next question. Note that as 
the data is all In capitals you must answer In capitals. 

Once you've answered all 10 questions you're given your 
•core and a message. 

At the moment there are two messages - printed by Lines 190 
and 200. You can easily change them or - by inserting more 
simitar lines - add messages of your own. 

If you want to add more questions change Line 330 to say 
how many there are in all. Then add more lines similar to 
those already at 350 to 440 at the end of the program. 

Start numbering the extra DATA statements at tine 450. 

Obviously, if you wish you can change all the data at the 
end of the program and put anything you want there. Geography, 
history, trivial pursuit - any type of question will do. Dont forget 
that if you change the type of quiz you'll also have to alter lines 
100 and 1 20. This simple quiz has many uses. H you come up 
with any novel questions mtui answers let us see them. There 
will be a prize for any DATA lines we pin to the noticeboard. 



REft Pop quiz 

REN (c)Let's Coipute! 

READ n 

DIH SS(R):DIH S(R) 

LET P=l 

FOR C=1 TO H 

READ $$(0,65(0 

NEXT 

CLS 

PRINT:PRINT "Let's Coipute! Pop 8 

FOR M TO n 

PRINT:PRINT "HMch group or art is 
ng ":PRINT SS(0;"?" 
INPUT AS 
PRINT 

IF A$=6S(C) THEN GOSUB 231 
IF A$<>GS(0 THEN 60SUB 271 
NEXT 

PRINT:PRINT:PRINT "You got ";P;" 
of ";H 
IF P>#.75*N THEN PRINT "That's no 

IF P<=I.75*H THEN PRINT "You tout 
better" 
PRINT 
END 

REN RI6HT ANSWER SUBROUTINE 
PRINT "Hell done, you're right" 
LET P=P*1 



261 RETURN 

271 REN WRONG ANSWER SUBROUTINE 

281 PRINT "Hard luck! You're wrong" 

291 PRINT "The right answer is: ";G$< 
C) 

3M RETURN 

311 REN DATA LINES 

321 REN NEXT IS NUNBER OF QUESTIONS 

331 DATA 11 

341 REN NEXT ARE SONGS, GROUPS 

351 DATA "1TSY BITSY TEENY WEENY","BO 
NBALURINA" 

361 DATA "TURTLE POWER","PARTNERS IN 
KRYM" 

371 DATA "LISTEN TO YOUR HEART","ROXE 
TTE" 

381 DATA "NAKED IN THE RAIN", "BLUE PE 
ARL" 

IH DATA "TONIGHT", "NEW KIDS ON THE B 
LOCK" 

411 DATA "YOU CAN'T TOUCH THIS","NC H 
ANNER" 

411 DATA "WHERE ARE YOU BABY?", "BETTY 

BOO" 

421 DATA "ENGLISHMAN IN NEW YORK", "ST 

ING" 

431 DATA "PRAYING FOR TINE", "GEORGE N 
ICHAEL" 

441 DATA "THIEVES IN THE TEHPLE'/PRI 

NCE" 



IS YOUR MACHINE HERE? 

Electron/BBC/Archimedes/ 
ST (stos)/Amiga (Amos)/ 

PC (GW-Baslc) 

The program will work as shown. 

Commodore 64/128 

Use capital letters throughout. 
Change line 90 to: 

9r PRINT CHRSM47) 




Spectrum 

Use 48k mode 
Change line 40 to: 



4| DIN SSIN*1,32):DIN G$(N,32): 
DIN AS(32) 

Insert a new line 

135 IF LENUS)<1I THEN LET *$=«♦' 
TO 135 



50 



2€ LETS COMPUTE' October 1990 

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Unit 4, B.D.C, 21 Temple Street, Wolverhampton WV2 4AN 

Tel: 0902 25304 



HIH/ia.lXIKON 



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COMPILATIONS 



PLAY FT AGAIN SAM 1 3 
PLAY FT AGAIN SAM 12 
PLAY IT AGAIN SAM 1 1 
PLAY FT AGAIN SAM 9 
PLAV FT AGAIN SAM 8 
PLAY IT AGAIN SAM 1 

PLAY FT AGAIN, 1AM 6 
PLAY IT AGAIN SAM S 
PLAY IT AGAIN SAM 4 



BARBARIAN 2. PERCY PENGUIN. HVPERBAU k PANDEMONIUM M/EL CASS 6 99 

M US OIK 8 99 M 3 5 DISC 9 99 

LAST NINA BY FAIR MEANS OR FOUL, SKIRMISH k BLAGGER BB/lL CASS 6.99 

SB 5 25 DISC 8 99 88 3 S DISC 9 99 

BARBARIAN. PIPELINE. BARON k MONSTERS M/U CASS 6.99 M 5 25 DISC 

8 99. BB 1 5 DISC 999 

CAMEIOT. STEVE DAVIS SNOOKER. SPVCAT fe THE UFE Of REPTON M/U CASS 

6 99 M S 2S DISC 8 99 

WINTER OLYMPIAD, QUEST, MR W12 h AROUNO THE WORLD IN fORTY 

SCREENS M/EL CASS 6 99 N S 2S DISC ■ .99 

(*E'RACK. BONE CRUSHER. SNAPPER k GHOULS. BB/U CASS 6 99 M 525 

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GALAFORCE 2. HUNCHBACK. HOPPER SENTINU (M ONIY). VIDEOS REVENGE 

(El ONLY) BB/El CASS 699. M S.2S DISC 8.99 

IMOGEN. ELIXIR, BUG BLASTER, FORTRESS (M ONLY). MOONRAIOER fU ONLY). 

M/U CASS 6 99 BB S 25 DISC ■ 99 

IRAK. GRAND PRIX CONSTRUCTION «T. SPULB4NOER k COSMIC 

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I9 99 BROM PLUS (EPROM) 

24 99 MOM PLUS DISC 

16 99 MACROM (IPROM) 

24 99 MACROM DISC 

16 99 BETA BASE 

32 99 BETA BASE UDUTKS 

27 99 BETA BASE PaC* COMPACT/ADfVDK 



COMPACT/ADFS/DFS 
COMPACT'ADFS/DFS 

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24 99 MR<U 

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17 99 MAN AT ARMS 

1499 MANCHESTER UNITED 

14 99 NEVRYON 

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1499 SUPERIOR GOLF CONSTRUCTION SET 

14 99 UIM 

1 7 99 WHITE MAG* 

9 99 WHITE MAGIC 2 * DESIGNER 



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ARCHIMIOKS VLI'I II.ITIKS 



ARCHMEDES TOOLKIT 
PRO ARTISAN. ... 
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ARTISAN UPGRADE 

ARTISAN CAUfRY (J OISCS) 

ARMADEUS 

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KNOWUDGE ORGANISER 

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37 99 
79 99 
47 99 
24 99 
1299 
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139 99 
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fOOTBAU DBHCTOR 2 (1281 J 
fOOTBAU MANAGER WORLD CUP ED 
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GHOULS ANO GHOSTS 

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INTERNATIONAL 3-0 TENNIS 

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MAX 

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MANCHESTER UNT 
MICROPROSE SOCCER 

NEW ZEALAND nORY 
OPERATION THUNDERBOLT. 

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PRO TENNIS TOURNAMENT 

RAP4BOW ISLAND 

RICK DANGEROUS 

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COMPILATIONS 



HEROES 

aCCO COLLECTION 
QUATTBO ADVENTURE 
WORLD CUP COMPRATION 
COMPUTE GAMES CENTRE 

QUATTRO POWER 

QUATTRO SPORTS 
THEBU 

MEGA MIX 
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IN CROWD 

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COLNOPHJTS 

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SUMMERTIME SPECIAL 

THR81TIME GCUD 1 
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STOJMLORD. UCAON. CYBERNCW) I k 2. CASS 2 99 

D1Z2Y, GHOST HUNTERS. SUPER ROBIN HOOO k VAMPM CASS 2 99 

KICK OFF, GARY UNEKERS HOT SHOTS k TRACKSUFT MANAGER- CASS B 99 

BRIAN CIOUGKS FOOTBAU fORTUNES, WIZARD'S LA*. HI Q QUIZ. <CE TEMPU. STEVE 

DAVIS SNOOKER. WOK PACK. SYNTAX. CAS TIE BIACKSTAR. POOL k PMBAU CASS 8 99 

MOTO CROSS SW r TWIN TURBO V8. POWERBOAT RACINC h ATV SM CASS 2 99 

PRO SNOOKER. GRAND PRIX SM, PRO SKI ANO BMX SM. CASS 2 99 

R-TYPE, OPERATION WOLF. DOUBLE DRAGON. BATMAN THE CAPED CRUSADER CASS 

999 

OPERATION WOLF. BARBARIAN 2. ORACON NR«A k REAL GHOSTBUSTERS CASS 9 99 

INDIANA fONES TEMPU OF DOOM. BLASTEROOS. UD STORM. THUNDERBIADE. *4P 

MISSION 2 CASS 9 99 DISC 1 3 99 

AfTEMURNER. LAST MN1A 2. WE C U MANS DOUBU DRAGON CASS 9 99 

RASTAN. FLYING SHARK, ARKANOO I ANO 2. SIAPUGHT BUMU BOMLL RENEGADE 

AND UGENO OF RACE CASS I 99 

KARNOV GRYZOR. BARBARIAN. CRAZY CARS. PREDATOR. COMBAT SCHOOL. PLATOON 

AND TARGET RENEGADE CASS 9 99 

PETER BEARDSUrS INT FOOTBALL. SOCCER SUPREMO fOOTBAU MANAGER, WORLD 

CHAMPIONS ANO PETER SHRTON'S HANDBALL MARADONA CASS 4.99 

ELITE. STABGUDER. ACE 2. SENTINU ANO TETRIS CASS S SO 

MATCH DAY 2. SUPERBOWL. WMER OlYMPVlD. NICK FALDO, CHAMPIONSHIP SPRINT. 

TRACK ANO f*LD. STEVE DAWS SNOOKER k SUPER HANG ON CASS899 

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999 OOC1399 

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SOLOMONS KEY. BRAVESTARR, CAPTAIN AMERICA TRANTOR. WORLD CLASS 

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ARTWOlf. SCOO»Y DOO. ■ATTLESHR»S. SABOTEUR El IRANK MUNO CASS 6 99 

COMMANDO. 1942. SPFThBE. COMBAT IYNX, DEEP STRM CASS 6 99 

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THUNOERCATS. BEYOND THE ICE PALACE. GREAT CURLANOS. HOPPING MAO k *ARl 

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BATTLE MASTER 19 99 

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BEV0ND THE KE PALACE 6 99 

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CHAOS STAKES MCA EDITOR 9 99 

CHASE H.Q I ! 99 

CHESSMASTER MOO SKOAL 0«fER N/A 

CMRONOOjUCST 2 19 99 

aOUOWNGDOMS SKOAL Of FEB N/A 

COO* NAME ICEMAN (1 MEC) N/A 

COLONELS BEQUEST N/A 

COMBO RACER 16 99 

COMMANDO ._____U99 



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DRAGON FORCE (t MEG) 

DRAGONS LAJR 29 99 

DRAGONS « f LAME 1699 

DUNGEON MASTER 16 99 
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FIGHTER BOMBER 19 99 

FIGHTER BOMBER MISSION DISC N/A 

FIGHTER SOCCER SKOAL OFFER 6 99 

F«( AND BRIMSTONE 1699 

FM BRIGADE <1 MEG) 19 99 

HJMROS QUEST N/A 

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FOOTBALL DIRECTOR 2 1199 

FOOTBALL MANAGER 4 99 

FOOTBALL MANAGER 2 H EXPANSION KIT 1 1 99 
FOOTBAU MANAGER WORLD CUR ID 1199 

FOOTBALLER OF THE YEAR 2 N/A 

IORMIAA ONE GRAND PRIX 4 99 

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GHOSTS AND GOBLINS (I MEG) 1199 

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16 99 

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UlSURESUtT LARRY 

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LEISURE SUTT LARRY J 

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THE LOST PATROL 



16 99 
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16 99 
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MANCHESTER UNITED 
MANHUNTER IN SAN FRANCISCO 

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NEW 11 99 

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-N/A 
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MATRB MARAUDERS 

MBDNTGHT RESISTANCE 

MIDWINTER 

MIGHT AND MACK 2 

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NEW N/A 
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MRDORUNRUN 

NEVERMIND 

NEW ZEALAND STORY 

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ORIENTAL GAMES 

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...NEW 16 99 

11.99 

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SUMMER OLYMPIAD 
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SWORD OF ARAGON 
T V SPORTS BASKETBALL 
TV SPORTS FOOTBALL 
TARGHAN 



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SIX TMKN BIT COMPILATIONS 



GREMLIN TRIPLE PACK 

HEROES 

PRtMCR COLLECTION 2 

STORY SO FAR VOL I 

WORLD CUP COMPRAIION 

ALL TB* FAVOURITES 

TRIAD VOL 1 

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GAUNTLET 2 STREET FCHTER, 1941 ft OUTRUN 

IT ANO AMIGA 19 99 



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MASTERCARD 
EUROCARO ACCEPTED 

LETSC10 





More objects means 
more fun. Our ace 
artist Mike Goldberg 




The last two month's listings gave you a basic game with monsters, a 
few objects to collect and hyperspace. If you've typed them In you're 
now ready to add this month's features. 

So what's new? Well, to start with you'll find the baddies laying 
bombs at random intervals. March Into one and you'll die! 

But If a baddie touches a bomb it only moves to another part of the 
screen. So beware! It could move right In front of you. 

Another object added by this listing Is a twin symbol. If a baddy 
moves over this it creates two clones of itself. You could end up with 
as many as 1 2 monsters. 

The idea Is to reach these objects before the baddies. There's also C 
symbols which give you a bonus when you collect them. 

And watch out for the yellow OFF switch. Run over It and 
the baddies will grind to a standstill for a few seconds. 

The final new object is the thumbs-up sign. When you run 
over one all the bombs disappear. 

Before adding the new features to your existing program 
you need to renumber It. How you do this Is explained on 
the right. Then just type in the listing and your program will 
be modified automatically. 

The lines printed in red are new ones. Blue indicates lines 
altered. And If you type in the line numbers shown in orange 
these old lines will be removed. 

The green areas show you all the new procedures and the 
REM lines explain what they do. 

When you've made these changes save the game using a 
different namm to the one you used before. 

Your game will now have all the extra features 

we've described. Enjoy playing until next month when 

we'll show how to give your game a final polish . 

30 LETS COMPUTE! October 1990 







J (J 



v~r~~ 



Horo's how to ronumbor last month'* 
program raady to ontor this month's 
extra bits: 

• LOAD last month's program 

• Type RENUMBER and press Return 

• SAVE the renumbered program (use 
a different name) 

• Type DELETE 10,1840 and presi 
Return so you're left with just the 
DATA lines. 

• Type RENUMBER 8000, (note the 
comma) and press Return. This 
renumbers the data lines so they can 
stay at the end of the program. 

• Save the data lines to tape or disc 
using the following commands: 

•SPOOL DATA 
LIST 



After the lines have listed 



•SPOOL 

• LOAD the renumbered program that 
you saved a few minutes ago. 

• Delete the existing data lines by 
typing DELETE 1850, (note the 
comma). M 

• Put the renumbered data lines (the 
ones you saved using 'SPOOL) on the 
end of the program by entering: 

•EXEC DATA 

• LIST the program to check that the 
main part is numbered from 10 to 1840 
and the data is from 8000 upwards. If 
it la, SAVE H. If not, try again - taking 
care to follow these instructions 
exactly. 





90 DimjX(12),VZ(12) 

I 

111 DIRdS(2) 

112 ©bZ=4:DlAo$(obX> 

113 noX=7:0maZ(noZ) 

1U F0RIZ=2T0noZ:READhaX(U):NEXT 

115 DATA7, 64,4,112, 241,1 

182 IFRND(50)=1PROCrnd 

201 IFstpX=0PROCbid 

292 IFstpZ=1:IFRND(100)=1ttpX=0 

461 VDU23,229,64,64, 32,16, 0,24,60,126 

462 VDU23, 230,102,106,102, 106,102,126, 
60,24 

463 ¥01123,231,1,5,37,43, 51,18, 28, 73 

464 V0U23,232, 255,140,28,22, 55, 237,137 

465 VDU23,233,0,0,0,10,50, 18,28,8 

466 V0U23, 234,60,12, 28,22,54,40,0,0 

467 VDU23, 235,0,0, 0,0, 0,16, 28, 8 

468 V0U23, 236,24, 12,24,20,0,0,0,0 

471 V0U23, 237,76, 82,82,50, 28,16,56,16 

472 V0U23,238,56,16,16, 112,152,148,149 
,98 

473 VDU23,239,126,255,189,255,231,231, 
255,231 

474 V0U23,243,231,231,231,255,255,189, 
255,126 

475 VDU23,244, 240,208, 247, 245,103, 103, 
242,247 

476 VDU23,245, 247, 247,247,247,247,247, 
247,0 

477 VDU23, 246, 16, 16,24, 28, 12, 118, 118, 6 

478 V0U23, 247, 246, 246, 6, 246, 246, 4, 112, 
112 

571 bS=KS*CHR$2*CHR$229+DS+CHRS230 

Ml dS(0>=K$KHRJ2*CHRS231*D$*CHR$232 

573 did )=K$*CHR»2*CHRS233*D$+CHR»234 

574 d«(2)=K$*CHRS2KHR$235*D*+CHR$236 

575 o$tl)=K$*CHR$1KHR$237*D$tCHR$238 

576 0S(2)=K$KHR$2+CHRS239*D$KHR$243 

577 o$(3J=K$*CHR$2KHR$244+DS*CHR$245 

578 oS(4)=KS+CHRS1+CHRS246+DS+CHRS247 
580 «X=4:lwZ=WZ:SZ=0 

601 eZ=10 
915 stpl=0 

1122 P2t=?<l5800*<(XXnZ>M6)t((YZ*yZ)* 
320)) 

1130 IFPZ<>0ORP2Z>0PROChit:IFhZ=0ENDPIO 
C 

1242 uZ=?U5800+((UZ(zZ)*DZ(RX>>*16)*<( 
vX(zX)*EZ(RX))»320>> 

1245 wZ=P0lNT(pZ,qZ> 

1250 IFuZ<>0PROCb»dhU:IFbhZ=0zZ>(zX*1> 
N0D(UZ):ENDPR0C 

1260 IFRND(eZ>:lNPS=bS£LSEMPS=BS 

1262 PRINTTAB(UX(zX),VZ(zZ))WPS 

1453 F0RIZ=2T0noZ 



a •» i i 


i -. e« ** : t ' 












co O c 


c 
cc 
1 , coo 

>iC 






Ills- 




c o 






CO C C 

o 

oo o o 

. OP 


> o 


o 




c c 


CO 






co cC 


* c 


1 "° 





BOMI 



SONUS 



switch 



OBJECTS 



Made from 
characters 

You 



Baddies 




227 and 228 



and ?30 237 and 238 239 and 243 



Collect them Die on contact Get bonus Turn off baddies 



1454 tFP2Z=h«Z(IZ)hZ=II 

1455 NEXT 
1460 

70 

1480 

1520 ]FhZ=1ANDLZ>0GO$UB1850:PROCdie:IFL 
X>0PROChs 

1532 IM=3«O$UB1850:PROCdte:iFLZ>0PROG 
hs 

1533 lFhZ=4SOUNO3,-13,0,1:PROCscorelRHO 
(1200)*5) 

1534 JFhZx5SOUND3,-13,90 / 1:stpZ=1 

1535 IFhX=7PR0Cuxb 

1590 IFbhZ=2$OUND2,-15,230,1:GO$UBl840: 
PRINTTAB(fZ,gZ)C* 

1595 IFbhZ=3SOUND2,-15,199,1:GO$UB1840: 
PRINTTAB(fZ,gZ)b$ 

1596 IFbhZ=6AN0MZ<12L«Z=WZ:WZ=WZ*2:F0RI 
Z=lwXTOMX-1:6OSUB1840:UZUZ)=fX:VX(lZ)=g 
Z:PRINT1AB<UZ(1Z),VZ(1Z))HS:NEXT 

1650 IFUZ(z:)*DZ(RZ) = nAHOVZ(zZ)*EZ(RZ) 
=YXbhX=1:ENDPR0C 
1660 
1670 
1680 

1682 F0RlZ=2T0noZ 

1683 IFuZ=haZ(IZ)bhZ=IZ 

1684 NEXT 
1785 VZ=4 

1850 LZ=LZ-1:COLOUR128:COLOUR2:PII«TTAB. 
(2,2);LZ:$OUND1,-12,90,1:RETURN 
2000 REN ••• DIE *« 

2010 OEFPROCdie 

2020 FORIZ=0TO2 

2030 PRINTTA6(XX,YX)dS(IZ) 

2040 PR0Cdelly(5) 

2050 NEXT 

2060 PRINTTAB(XZ,TZ)B$ 

2070 ENDPROC 

3000 REN "* RND *** 

3010 DEFPROCrnd 

3020 6OSUB1840 

3025 QZ=RND(obZ) 

3030 PRINTTAB(fZ,gZ)oS(QZ) 

3040 ENDPROC 

4000 REH *« UXB *•• 

4010 DEFPROCuxb 

4030 ieiZ=t5F90:ttZ=i»Z 

4040 F0RJZ=6T026STEP2 

4050 F0RIZ=U018 

4060 IF?te«Z=64PRINTTA8UX,JZ)BS 

4070 ieiZ=aeiZ*16 

4090 NEXT 

4100 ■■l=BiZ*640:ieiZ=u: 

4120 NEXT 

4130 ENDPROC 



HH'*/ IH 





THUMBSup 




?AA ir\H OAZ. 



Move them Move 1 



Erase them Erase them 



246 and 247 
■ Remo ve bombs 
Clone two more I Erase them 



SOMR/n 



host 



31 




9. 



Subscribe at the same 



ere's YOUR chance to become a member of 
the most exclusive club in computing - and save 
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If you become a founder subscriber to Let's 
Compute! by using the form below, you can also 
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As soon as we've registered your name we'll 
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In addition to your own Gold Membership Card 
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1 

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JfOT 



3'02 



Send me the next 1 2 issues of Let's Compute for the special 
introductory price of £12 (including postage and packing). 

Id also like to become a founder member of the Lets Compute! 
Club for the special price of £3 (instead of the regular £5) - so 
please send me the bumper Club pack with my first issue. 



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PleaseVsend 
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Compact Archil (3.5" cfcc) BBOBk (5.25" 40 T) I BBGEk (5.25" 80 T) D B8C/Ek (tape) Amiga (dec) CPC (disc) 



[LCIO 



Spectrum (tape) 
3oeo 



Spectrum (disc) 

306' 



C64.'128«iSC) 

308? 



□ C64/128(tape) 

J063 



ST (disc) 

30S4 



C PC (555*) 



CPC (tape) 

30S7 

PC (3.51 

MM 







and save £2! 







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airnMEHi 




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COM r .U«/ 



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• — 



rittUft 



I" 



!2__ f 



cam fin' 






i 






This l$ :h* BBC WUon - offer vtnJon* m// wy 




Your own logo disc or tape for £1 ! 




Turtle graphics is a 
vital part of any Logo 
program. And that's 
what Turtle Logo is. 
Specially written for 
the Electron, BBC 
Micro and 

Archimedes series, it 
is on the tape or disc 
that comes with the 
Let's Compute! Club 
bumper pack. 

You can find out 
how to join the Club 
on Page 32 - and 
about all the other 
goodies you can get 
with it. 

However, if you 
only want Turtle 
Logo we'll send it to 
you for just £1 if you 
complete and return 

the coupon below - 




ORDER FORM 



Please send me the Let's ■ 

Compute' Turtle Logo. I : 

: enclose cheque, postal order 

or stamps the the value of £ 1 . 

(Only suitable tor Electron, BBC '■ 
; Micro or Archimedes series I 

: Name 

Address . . 

Postcode 

: A 9 e 

Please send it on 

r :5.25in40Tdisc 
□ 5.25tn 80T disc 
C3.5indisc 
Cassette 

: SEND TO. 

Logo Offer. 

Let's Compute! 
I Europa House ■ 

Adlington Park 
1 Macclesfield K 
1 SK10 5NY 
j 

34 LETS COMPUTE! October 1990 




Oh 

yes 

It Is! 



LT 91 


FD (0 


FD 551 


RT 90 


BK 11M 


FD 30 


PU 


PU 


LT 90 


FD 20 


FD 111 


PD 


PD 


FD 150 


RT 90 


PU 


FO 11M 


FD 20 


BK 511 


PD 


LT 91 


FD 30 


PU 


RT 90 


FD 200 


FD 60 


PO 


LT 90 


RT 181 


FD 20 


FD 241 


LT 90 


PU 


FD 20 


FD 31 


PU 


PD 


FD 100 


FD 20 


PD 


IT 90 


FD 20 


FO 200 


LT 90 


RT 91 


FD 20 


FD 20 


LT 90 


PU 


FD 40 


FD 20 


RT 45 


PD 


FD 80 


FD 70 


RT 45 


LT 90 


FD 30 


FD 20 


LT 90 


LT 90 


FD 5 


FD 20 


PU 


PU 


FD 15 


FD 100 


PD 


PD 


FD 200 


FD 20 


RT 90 


RT 90 


FD 125 


FD 20 


RT 90 


RT 90 


FD 200 


FD 20 


PU 


RT 90 


FD 20 


FD 20 


PD 


LT 90 


FD 200 




%dfr*0> 

Here's 

another program 

written in the 

turtle's favourite language, Logo. Unlike the knot 

patterns in previous issues of Let's Compute! this one 

draws a REAL knot. 

It creates a Highwayman's Hitch. That's the kind of 
knot used for tying up horses or boats. 

It was sent in by Neil Melville (10) of Maidstone, 
Kent. Uses only very simple commands. 

But it shows how, with just one or two of the Logo 
instructions and a bit of patience you can create real 
diagrams. 

To try this program out yourself you first need to run 
the Logo Language. 

If you haven't got it and you're using an Acorn 
computer the Let's Compute! Turtle Logo is an ideal 
starting point - see the offer on the left. 

Then just type in the instructions and watch the 
knot draw move by move. If you already know how to 
define procedures you can put all the instructions in 
one. Then you can call it every time you want to draw 
the knot. 

If you don't know how to define procedures, keep 
reading Logo Lowdown. You soon will. 

If you can draw a knot - or anything else - in Logo 
let us see it. Send us a listing if you have a printer 
and also send us the program on tape or disc. Also, 
let us know which version of Logo you used. 

Send it to Let's Compute! Adlington Park, 
Macclesfield SK10 4NP. There's a super Let's 
Compute! baseball cap for the writer of every one we 
print. 



wonpsrS 

WHAT LO*0 < 4 
tC LIK6' 






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REPEAT 6 fgT6Q REPE^ 3 [fp2oo Rx ggjjg 



r THOS« TMRMj 

FORWARDS 

MffAN Wff MI*HT 
HAWC TMR£B SIDE* 
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REPEAT 6(flT 60 «KRT 3 (FD 200 RT 120]] 

' / WELL, we know That 

/ RT GO R&P6AT 3 fFO 2oo RT l2o]3 

I G'V^S OS A TILTCO TRlAN^LC 

\i£T's write Triangle instead 

THE BOARO IS 

RIPERT 6CTMANQLE3 






THAT'S GASY MISS, JUST 
J>RAW ^IX TRlAN<3iLES^. 



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BV A SIXTH or A TURNi 



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RT 60 REPEAT 3 [fO 2oo RT l2o] 




on youR. MICRO : 

?TO TRIANGLE 
>RT 60 

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/try it yoi/RE '—n n 

J BEIN<3 TEACHER NOVnA 
^7 TELUM^ "THe TURTLE \ 
V^AT TfttANCLH MEAj-JsJ 




To Triangle •• teacher -™b. TuR^n-e owe* 

TRIANGLE 



RT 60 
REPEAT 3 [FD 200 

ENO 



When/ever you give tu* o«.cefc 

OR COMMAND TRIANGLE THC 

TuctlE J>oes what you hav/£ 

TAUGHT IT- 

T T^ESE ARE TWe COMMAMPS 
YOU WAMT TUff TUKTUr "TO 
PO WWBKJ IT .SE£^ TME 

7^«n^OAoea triangle 



KTl20]j. 



IMS TFUS *7*E TURTLE. TWATS 

the £VP op th<s SEaes cf 

COMMAMPS 




TltlANGLE pcfimed 

MEANS I KMOW 
WHAT "Tt> PO WHe*J 

■ *■* 7*1 ANGLE 



LM*N f/R£T 

Tim* 







Wxwe THE TURTLE DOES WHAT tT'S Tt>UC> 

SVCNTHRiM^: 



WHEN 
I GIVE 

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TWiW^S 
vAfSPfEV/ 



CS TRlANGlB 

THEN ENTlSft: 
TRIANGLE 

AND AGAifJ i 

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T* (ANGLE 

SEE' WHAT 'S HAPPENING? 
NOW TRy: 

CS R6P6RT 6 [Triangle] 





CAN YOU DO TV«e SAME- -|HW40» 
WITH SQUARE. S ? 




TO SQUARE 

FD 200 
fcT 90 
PO 200 
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FD 200 

RT 90 
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WELL tOja TfcRESfl 
f NOTICE you HAP TD 

Repeat rr mor& Times 
TO "GET rdump tv*e circle " 
what happens ip y&j 
Tilt each square 



/LOOK WHAT 
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Ravens head, 

Nottinghamshire 

Age 12 






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Dalwinder Dhanjal, 

Normanton, 

Derby, 

Age 14 



***** 












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Dublin, Ireland, 

Age 12 






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St. Helier, Jersey, 

Age 7 



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3d LET'S COMPUTE' October 1990 







J 




MAcHtfe 




The turtle invasion has ended! Over the last 
couple of months the Let's Compute! office 
has been flooded out with the creatures - all 
because ace artist Mike Goldberg challenged 
you to design a Supa Turbo Turtle. 

• Pictured left is the winner - a magnificent 
effort from Neil Giggins (13) from Towcester, 
Northants. Mike's worked his magic on Neil's 
design and produced the stunning painting 
above. It will be given a fab frame before 
being handed over to Neil. 

• Among its many features are a 300,000 
decibel siren to warn animals out of the way, 
an arm to rub off splatted flies and a laser to 
blast non-moving objects to smithereens. 
This six wheel drive creature with spiked 
tyres has been designed to reach incredibly 
high speeds. 

• The five runners-up whose turtles arc 
pictured opposite will each receive Let's 
Compute! baseball caps. 

There's another Mike Goldberg 
challenge on Page 43! 

LETS COMPUTE' October 1990 39 







VAT INCL. ADD £2.85 P&P. ADD £9 NEXT DAY DELIVERY 



AMIGAS 

BATPACK £355 

FLIGHT OF 

FANTASY £357 

CLASS OF 

THEWS £493 



Mouse Mai £2X0 

Cleaning Kit £2 

Ram Pack £40 

+ clock £45 

Cumana ext 

drive £66 



\TARIS 

DISCOVERY £259 

EXTERNAL 

DRIVE + PSU £67 

ZIP STICK £11 

CHEETAH 125+ £6.90 



a 



* C64 WORLD CUP PACK £130 * 



I \M.OKM-M>4 HEQ1 KS Klll.l.vl III, 

349 DITCHLING ROAD, BRIGHTON BNI tJJ 

Itl: 0273 506269 (mobile phone: OS M 279084) 7 da>s 24 hours 




Mijas Software 



The New Issue of 
'A Book on C by 
Berry And 
Meeklngs 
ill inclusive. 



Small C System £69 (inclusive of vat p a p > 

Use Ibc Mijas Small C System m the BBC B or MASTER series computers 
for games, educational and industrial software. Small C programs run up 
to 12 times faster than in BASIC. Your code Is highly portable and can be 
recompiled to run on the ARCHIMEDES or RI40 using the Acorn ANSI C 
compiler (not supplied) and on many other machines. You can also use the 
power of the ARCHIMEDES for the rapid development and test of BBC B 
or MASTER programs. Manuals and post sales support included. 

This Small C System produces stand-alone programs with up to 40K of 
code in ROM and/or MAIN memory. Libraries, extendable by the user, 
provide memory allocation, multi-mode graphics, file handling, t'o 
formatting, string handling, and system calls. Full assembler interface. 

The system includes the V3.0 Small C compiler & Libraries", Oplimiscr, 
Assembler, Linker, Source-Level Debug^nd SHELL. SOURCE CODE is 
supplied for the compiler and all libraries. Using the MAKE facility and 
editable makefiles, C code is automatically compiled to assembler source, 
assembled and then linked with the minimum necessary library code. 

Available for the MASTER series Computers, BBC B* or B with sideways 
ram, and ARCHIMEDES. Software supplied on SOT double sided 5.25" or 
3.5" ADFS or DFS disk. The ADFS disk contains the SHELL source code. 
The system is also available for other hardware configurations, including 
systems for the Mitsubishi MELPS processors, please write for details. 



Laser Typesetting Program £23 



inclusive 



Low cost DTP for any BBC B, MASTER or ARCHIMEDES. Requires an 
HP Deskjet or Laserjet printer or emulation. Use for letters, booklets, 
forms and manuals with rules and shading, full multi-font justification, in 
single or multi-column. Fast printing using the printer's internal fonts. 
ADFS or DFS disk with rom image, £23 Inclusive of vat, p&p. Eprom 
(avoids the need for sideways ram on BBC B) £7 extra. 

Please state your computer system when ordering frorn:- 

MIJAs SOFTWARE, Winchester Rd. Micheldevcr, 

Winchester, Hants S021 3DG. Tel 0962 89 352. 

Official orders, ACCESS and VISA Welcome 

'Includes original Small C code supplied at the cost of distribution. 



Spell Book 4-9 Years 

Things To Do With Words 

Things To Do With Numbers 



Maths With Bill) Bear 



Puzzle Book 1 4-90 years 
Puzzle Book 2 4-90 Years 
Puzzle Book 3 4-90 Years 



Puzzle Book 4 4-90 Years 



Wl 



Lets Spell At The Shops 

Lets Spell At Home 
Lets Spell Out And About 



Ail of t*t j«»e art mo t.tttt <n frtneti 



$w£ 






■V' < wAHE 

19 QUARRY HILL ROAD, TONBRIDGE, 
KENT TN9 2RN 



Phone (0732) 351234 Fax (0732) 770234 
School and Government order* taken 



*•"' 



ta»bfc»i 



WHII 



•!• « 







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Leave £10 in a 
piggy bank and a 
year later you'll 
still have £10. But 
put it in a bank 
account and in 
the same time it 
could have grown 
by an extra 70p. 





This program teaches your computer how to work 
out your bank interest. 
And shows you how that nestegg will grow and 

grow. 

How much you can mako depends on two things: 
Tho present interest rate - which can chango at 
any time. And how long you loava your money in 
tho bank. 

To find out how much interest you're earning Just 
answer tho simple questions your computer will 
ask you. Have your bank book In front of you. You'll 
need to toll the computer about each time you put 
money in or took some out. 

First you'll bo asked to give tho date you did this. 
Typo it in as throe numbers, separated by commas. 



So, November 5 this year would bo entered as: 

»t11,*0 

Than you need to say how much you put in or 
took out. If you took money out, put a minus (-) fin 
front of tho number you typo In. 

Next, tell tho program what the interest rate was 
at the time. You're then askod if you want to enter 
any more. You can reply Y or N. 

If you answer Y you'll got tho same questions 
again. Like this, you can make as many entries as 
are in your bank book. If you answer N you'll be 
askod for today's date. 

Once you've typed this in, you'll bo told what 
interest you're now duo. 



11 REN Interest 

21 REN by Ken Hughes 

31 REN (c)ltt'l Coipute! 

41 DIR DC1M) 

51 DIR h-dffl) 

61 DIN Y(HI) 

71 DIN C(lll) 

SI DIN R(1II> 

91 CLS 

111 LET N=l 

111 LET N=N*1 

121 INPUT "What is 
,y)";D<N),N<N>,Y<N) 

131 INPUT-Ho* auch* 

ni INPUT "What interest rate\'R(N> 

151 LET R(N)=R(N)/1H/365 

161 INPUT"Do you want to enter aore (Y 

171 If AS="y" OR A$="Y" THEN 60T0 111 

181 IF ASo-n" AND A$o"N" THEN GOTO 1 



the entry date (d,a 
;C(N) 



61 

191 IF Td)<1M THEN Y(1)=Y(1>*19ll 

211 LET MM 

211 INPUT"Enter today's date: d,a,y "; 
D(N),H(N),r<N> 

221 LET TBAL=I 

231 FOR N = 2 TO N 

241 IF Y(N)<1II THEN Y(N)=Y(N)*19ll 

251 LET T1=D(N-1)*(N(N-1)*3I.5)*(Y(N-1 

)*12»3l.5i 

261 LET T2=D(N)»(N(N)*3l.5)*(Y(N)M2 i 3 

1.5) 

271 TENPDAT£=T2-T1 

281 LET TBAL=TBAL*C<".-1) 

291 LET TBAL=TBAL*(TBAL«R(N-1)*TENPDAT 

E) 

311 NEXT N 

311 LET TBAL=INT(TBAL*1II) 

321 LET TBAL=T8AL/1II 

331 PRINT:PIINT"You now have: ";TIAL 




Averaging it out 

To keep the Hating short we've told 
your computer each month has 30.5 
days rather than 28, 20, 30 or 31. 
This means that the results ave net 
awjtto ac c urate - but not that far out. 

IS YOUR COMPUTER HERE 

C64/128: Change line 90 to: 

90 PRINT CHRSIU7) 

ST (Stos) Amiga (Amos): Put # 

after all the vahable names that don't 
end in $. So D(100) becomes D#(100). 
TBAL becomes TBAL# and so on. 

M LISTING WORKS AS IT IS ON OTHER MICROS 



LETS COMPUTE' October 1990 41 



GAMES "*$ &93G& 

stems 




!Mt MW) at 33p p»* fl*n c^eap rat* and 44p pvt m»*i «f «n oft*' hm#^ 



( Ai* «noew pay* p*on» 0*1 ) 



Al COMPUTER SERVICES 

For your Computer Repairs 

and Supplies 

We are Authorised Amstrad Dealers and also 

an authorised Microvitec Service Centre. 

Used Equipment bought and sold. We also supply 

ribbons and discs at discount prices 

Leasing and credit facilities available 

9 PADDOCK MOUNT, DAYVLEY, TELFORD, 

SHROPSHIRE. 114 3PR bsssssssh 

Tel: 0952-502737 visa 

Fax: 0952 630110 



Access 




Cambridge International Software 

8 Herbrand St., London WC1N 1HZ 

071 833 4023 

ARCHIMEDES AUTUMN FAIR 

October 27 & 28 (Sat & Sun) 

10am - 5pm 

100's of Archimedes Products and 
demonstrations under one roof 

Hardware, Software, Games, Music, 

Educational, CAD, Books, Disks, 

Video, Printers etc etc. 

£1 entry - raffle - refreshments 
Exhibitors include: 



Dabhand 


A & B ■ 


CIS 


Arxe 1 


Ampsound 


Brainsofl 1 


Mijas 


Minerva I 


Apricote 


RTFM I 


Electronic Font Foundry 


Calligraph 1 


MJD 


Acorn 1 


and many more 








{ANSWERBACK 

Junior Quiz 




If you like quizzes this program is for youl 
There are 750 general knowledge questions for you 
to try. Each time you find the right answer you can 
have another turn in the game. Can you defeat the 
dreadful dragon and save the owner of the Castle? 

The program even lets you write your own quizzes 

and save them on disc or cassette 

- amaze your friends! 

BBC/Electron AmaU ad casa C9.95 Spectrum caaaotle C8.95 
BBC disc (40 or 50 track) £1 0.95 BBC 3.5" disc £1 2.95 
Arnatrad CPC 3" disc £13.95 Spectrum +3 disc £10.95 

IBM disc (3.5" or 5.25-) £19.95 Amiga/Atari disc £19.95 

Prices Include VAT and P&P 

Kosmos are specialist producers of Educational 

Software designed to help you enjoy learning from your 

computer over a wide range of subjects. 



Write or telephone fora FREE 20-page BROCHURE 
of our Educational & Leisure software 

Please state your computer type 



Kosmos Software Ltd, 1 Pilgrims Close, Harllngton 

DUNSTABLE, Beds. LU5 6LX 

Telephone 05255 3942 or 5406 

ntosmos 
a s_c r k a e * 




f 



• 



/ 



lit* Mflta Goldlzarz cfrzffffigfzl 





How to enter 

Study these two pictures. There are 
not exactly the same. On the right- 
hand picture circle all the differences 
you can spot. 

When you've found them all - and 
don't stop at 10! - fill in the entry 
form below. Then just cut out (or 
photocopy) this page and send it in 
before October 31 . 




. . . this unique, 
hand - painted 
jigsaw. It was 
specially made 
by cartoonist 
Mike Goldberg, the 
creator of Rom and 
Ram, and will be 
personalised with 
the winner's name. 





Postcode 



My computer is: 



Send this comple page to: Spot the Difference 
Competition, Let's Compute! Europa House. 
Adlington Park. Macclesfield SK10 4NP. 



- 



LET'S COMPUTE' October 1990 43 



An exit poll 
conducted at 
last year's 
Computer 
Shopper Show 
revealed that 95 
per cent of 
customers 
reported 
"substantial 
savings" from 
purchases - 
with individual 
figures ranging 
from £50 to 
more than 
£1,000! 



* One-stop shopping for ALL your 
computer Christmas presents! 

* Hundreds of stands packed with 
special show bargains! 

* Expert advice to help you make 
the right choice' 









mma^mm 



^^ 



HH 



^^■^V 





Please send me 

Adult tickets at £4 (save £1 ) 

Under 16s tickets at £2.50 (save £1 ) 

I expect to attend the Show on: 
□ Thursday D Saturday 

Friday D Sunday 

I would like to pay by: 
Cheque payable to Blenheim Database Exhibitions 

D Visa a Access 
L 



Family tickets - admits up to 2 adults and 2 
children -£12.00 (save £5) 



I am interested in: 
D Acorn C Amstrad 
IBM □ Other 



Atari Commodore * 



Name 



Address 



Signed, 



Please return your completed onter form to: 

Computer Shopper Show Ticket Office, 

PO Box 2, Eltesmere Port, South Wirral L65 3EA 




Postcode 



LC10 



RING THE SHOW'S 
24-HOUR HOTLINE 



051-357 1736 



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PONT MISS A THING! Take out a subscription: Page 32 Tell your newsagent: Page 42 





C Commodore 



Commodore A500 
Flight Of Fantasy 



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A500 BATMAN PACK 




The Commotio** A500 Batman Pick mu$1 
surety f enk as on* of the most popular com- 
puter packs aver 1 Th* pack feature* the 
Commodort Amiga 500 computer with 
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four lop software titles The aoftware in- 
clude* 'Batman The Movte ■ Rtd Gotham 
City of the cunnmg joker, in Ocean** lop 
selling title baaed on the blockbuster Bat 
man film; New Zealand Story -hfghquai- 
ty conversion of the leading arcade gam* p 
Interceptor ■ Dogfight with two F 16* *n 
this leading flight simulator. Deluxe Paint 
tt ■ top quality Amiga graphics package 
wh*ch set the standard for others to follow. 
Return the coupon for further details 



PACK INCLUDES: 

ASOO Computer & MouM C399.99 
A520 TV Modulator £24 .99 

Batman The Movie £24.95 

New Zealand Story £24.95 

Interceptor £24 95 

Deluxe Paint II £49.95 

TOTAL WP: £549 78 
Less Pack Saving £150 78 

PACK PPUCKi C9M-00 



INC 
VAT 




AMIGA 2000 




For the more serious or prof ess ional applica- 
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2000. at price* from C1?95*VAT. The A2000 
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FLIGHT OF FANTASY 



Fi*gm of Fantasy »s the very latest Amiga 500 pack from Commodore, 
featuring BRAND NEW software releases io make this the moet spec- 
tacular ASOO pack ***** The pack feature* the Amiga 500 computer 
with mouse controller and TV modulator as well as tour top software 
titles. These include the following; 



DCLUXC PAINT II 



Th*rvg*W*»YL 

Ml thf> HandSrd tor otft** AmtQ* art 

perflSQM OsHii* P*rt M >ACtud*ft 

pcmeMuJ s*sy lo uh loo's tfuf bong 

out the ftrtiot *ft you Cww maw 

poem pf*M*nta*om 3D i 

op lustoMtf* 



ESCAn *Q9QT UQHSTiRS 



H«tj t hommtorq c ompmsi i i 

a soence Keen #or> **r> comtc 
boot it*** fluprne* Ch* tmv% Jft*# 
#nd Du*» mrm on th# Pf*r»ft X re*cu 
trig Human* who ntv* D**p> c**Jtn f »0 
Dv !*»• Rood Uon*l»n» and forced to 
C3*#*i an aw Roooi Army lo DCSTROr 
EATTT K* Jwe and Ck**a fgM t*e* »■, 

ChfOUQ* hOfUS* Of *Yil RoOXKf 10 *•*!> 

the Mumirii **C4pa 



RAINBOW ISLANDS 



P29 RBTALIATOP 



Th* jfcna* m ISo/l fmuWon wff ■ onOKS 
of 1*0 a*tr an and lou' berti* •^wmant* 
*»fn OOMAA Of dmV»rtf tactical rrmt*om 
Aa**>£emt>aJ tir*t»e*c fcomemot ****** 
uy grooAj paaao batttes. •*«Q»ng camera 
ir>a :.■»! of W^N 4 and**** «*•! t*m* 
cocftpii display*. iftfvO'fto, vu* 'ada* 
•nnanc* in* ***p'«*C «*#» O* It** atanning 
f>muWil*on 



Sap on your fujpc **o** P'*C»*e 
growing s ra+nto* lAfl yQtf't nMO> 
Iogo-Hfcn<]no0i>»ng Fro»** tha l***r*c 
of Oon to Monw l»i*nd m **** «n 
countor Don nttTPMfff . *-nging n » C^ 
MW combat mftcn-nai m#ch«n4C4V 
•StfriiTtt lr^« ■o*«*d*&** 0«>ngf) of 
t*9*no and to*My* F-n*»»y •«**' *p*a 
aflrtd of o*nxn#H and >t> mfw>M*«^ 



PACK INCLUDES: 

A500 Computer A Mouse 1 399 99 
A520 TV Moduletor C24 99 

Deluxe Paint II C 49 95 

Eacape/Hobot Monster* £19.99 
Rainbow Ittanda C34SS 

F29 Relalielor C?4 95 

TOTAL RRP: £54482 
less Pack Saving £1456? 

PACK PRICE: CJttt-00 

£399 



FOR FURTHER DETAILS OF THE AMIGA 

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THE FULL STOCK RANGE All of your Amiga requirements from one supplier 
FREE CATALOGUES Will be mailed to you with offers and software/peripheral details 
payment By cash, cheque and all major credit cards 
CREDIT PAYMENT TERMS Silica are Itcensed credit brokers - return coupon for details 

Beta* you decide when to buy you' nee Amiga computer *• suggest you think very carefully s&out WHERE 
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MAIL 0R0CR: M The Mews. Hatherley Rd. Sidcup Kent DA14 4DX Tel: 081 309 1111 

Ord^L^»Op#r Uk*> S*l vOOameDOpffi No L« Night Openi_ng_ P*-Ho 3fli 30S 0f>* 

LONDON SHOP: 52 Tottenham Court Road. London W1P OBA Tel: 071-580 4000 

Opsn-nj Hoor» Uon-Stf « 30»™ -SMpTW U tl N.9^1 '-. ^m Ffl, Mo 07' 121 * r 27 

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