TheMicroUser002-Apr83.pdf

(49129 KB) Pobierz
111"--•'
Zitit0
0E3E1
The independent magazine t h a t helps
you t o make t h e m o s t o f your micro
Volume 1 N o . 2
April 1 9 8 3 E l
ft
?scue damsels in distress and
1 " f
4 = 9 1
mai
It's another free
action-packed game
And there's much,
much more inside...
MORE help for the
first-time user
MORE expert tips
on graphics,
monitors,
1 interfaces,
i disassembly
- and pages
Of listings
A + F SOFTWARE A +
PA I N T E R E13-00
From the dark depths of "A&F Software's", development centre, comes the
Game of the Year. 100% Machine Code, Fast, Addictive, Multiple Screens,
High Score, Sound, Colour, 6 Skill Levels - "SOFTWARE AT ITS BEST"
Available n o w f o r all B B C users. Fill in t h e g r i d s with y o u r painter, b e f o r e the
chasing fizzers get you, d r o p gaps to confuse the fizzers. b u t don't trap yourself.
RUNS O N A L L OS's requires 32k m e m o r y.
PRICES - CASSETTE E8.00 - DISC E11.50
T M M I E
H
T
O
M
1.0
411al. t X 4 4 e t z t s =
11 ,
0
A
ddilo
•
siMINUO
M
e
e f t f t e d i
Arcade action with this version o f the well
known p o p u l a r a r c a d e game. Written i n
machine c o d e t o r u n o n all O S ' s in 32k. C a n
you g e t y o u r Frog across the r o a d a n d r i v e r
to safety.
PRICES C A S S E T T E 03.00 - D I S C E11.50
Waves o f aircraft and helicopters a r e
attacking you, using y o u r d e f e n c e b a s e you
must destroy t h e diving r a i d e r s b e f o r e they
can w i p e you out_ Written i n m a c h i n e c o d e
to suit all O S ' s will r u n o n a n y 32k B B C .
PRICES - C A S S E T T E S M O O D I S C E11.50
A fully interactive graphics adventure game, fight t h e monsters and d e m o n s as you find
your way into the tomb room to steal the "Pharoah's Mask". Beware the "MUMMY''.
Runs o n all OSI's in 32k.
PRICES C A S S E T T E E8.00 - D I S C E11.50
TORCH U S E R S - A L L P R O G R A M S AVA I L A B L E O N DISC AT £15.50 PER TITLE
Orders to: A & F S O F T WA R E , 830 H y d e Road, Manchester, M 1 8 7JD
061-223 6206
(24 hrs)
enclosing c h e q u e / P. O . p a y a b l e t o A & F Software (MICRO-LINK).
To avoid contusion please state ABC on your order thank you,
24 HOUR ANSWERING SERVICE FOR TELEPHONE ORDERS
A1.110
Telex: 667461
ATTN A & F )
NO9/11G D99 Vs+C tilD3d5
Launch your BBC micrs
with the Torch Z80 disc pack.
If you already have a BBC Model B micro, then you know that it is
not a toy. But neither is it suitable for business or for serious programming
because it lacks the access speeds and massive storage capacity that only
floppy discs can provide.
The answer is a TORCH Z80 DISC PACK. The twin discs store up to
00K of data and programs, while the Z80 processor board provides an extra 63K
of user memory and Torch's CP/Wcompatible operating system - giving access to
the largest range of software currently available.
For the business user, this means sophisticated word processing, financial
and stock-control packages. For the programme' who has outgrown BASIC, the
TORCH DISC PACK can handle more compact, Awerful, and specialised
4•• • l a n g u a g e s - such as PASCAL, CMTORTRAN, LISP and COBOL.
-mot
The TORCH Z80 DISC PACK comes complete kAi I th a
range of useful software, including a full disc function test, a
character redefinition program, a music generator, a Z80
monitor and system demongrations, -
-
TORCH gives you the power and programming space to
launch your BBC micro into the world of serious computing.
T O R C H ftti:
COMPUTERS -2%14v
.fionittw
Abberley Hog*, Great Shelford, Cambridge CB2 5LQ
Telephone. (0223) 841000 Telex: 818841 TORCH G.
'''•11.111111110
•CPM is the registered trademark of Digital Research Ltd.
ZOBEIEJ
0012112
,
C
O
O
TENTS
NEWS
Keep u p t o date w i t h all the latest develop-
ments i n the bustling B B C M i c r o w o r l d
M •••,. • M
. O ,•
:
••' •
mitreAmmoet
rommuram mak
M O AGA NV int
TELETEXT
MODE 7 can produce impressive graphics.
Our experts tell you h o w t o get started.
111
9
)
)
LISTINGS
Vol. 1 N o . 2
April 1 9 8 3
Having trouble keying in listings? W e
review some c o m m o n copying errors.
Managing Editor
Derek M e a k i n
Features Editor
Mike Bibby
Art Editor
Peter Glover
Advertisement Manager
John Riding
Advertising Sales
John S n o w d e n
Mike H a y e s
Tel: 0 6 1 - 4 5 6 8 3 8 3 (Editorial)
061-456 8 5 0 0 Advertising)
Telex: 6 6 7 6 6 4 SHARET G
Published b y :
Database P u b l i c a t i o n s L t d ,
Europa H o u s e , 6 8 C h e s t e r R o a d ,
Hazel G r o v e , S t o c k p o r t S K 1 5 N Y.
Subscription r a t e s f o r
12 issues, p o s t f r e e :
112 - U K
113 - Eire IIR 11 6 )
118 - Europe
C15 - U S A Isurfacel
£25 - USA lairmaill
£15 - Rest o f world
(surface)
£30 - Rest o f world
iairmail)
BBC Micro User welcomes program list-
ings and articles for publication. Material
Should be typed or computer-printed, and
preferably double-spaced. Program l i s t -
ings should be accompanied by cassette
tape o r disc. Please enclose a stamped,
self addressed envelope, o t h e r w i s e t h e
return of material cannot be guaranteed,
Contributions accepted f o r publication
will be on an all-rights basis_
c 1 9 8 3 Database Publications L t d N o
material may be reproduced in whole o r
In part without written permission. While
every care is taken, the publishers cannot
be held legally responsible for any errors
in a r t i c l e s o r l i s t i n g s
TUTORIAL
ea
I
We show the first-time user that programm-
ing is nothing like as hard as it might sound.
1
DO-IT-YOURSELF
It costs next t o nothing t o use your BBC
Micro t o measure heat a n d light.
29
GRAPHICS
Learn t o draw multi-coloured lines i n the
next stage o f o u r graphics course,
STRUCTURE
Play N I M — and find o u t h o w structured
programming can easily write itself.
36
GAME o f the M O N T H )
HOW IT WORKS
More about t h e operating system i n o u r
conducted t o u r through t h e B B C Micro.
Fly your helicopter t o rescue King Kong's
victims — b u t watch those deadly rocks!
M O N I TO R S
1 P a r t II o f o u r series r e v i e w i n g colour
monitors available f o r the BBC Micro.
a
)
HANDBOOK
TAPE OFFER
An essential reference guide for Basic
programmers in a n eight-page pullout.
BBC M i c r o U s e r i s a n i n d e p e n d e n t
publication a n d neither t h e B B C n o r
Acorn Computers L td are responsible for
any of the articles in this issue or for any
of the opinions expressed
Distribution to the news trade in the UK
and Ireland is by Wells Gardner. Darton
and C o Ltd., Faygate. Horsham. W e s t
Sussex R H 1 2 4 S U (tel: Faygate 4441.
Enquiries regarding overseas distribution
should be made direct to the publishers.
4 B B C MICRO USER A p r i l 1 9 8 3
Save y o u r s e l f t h e c h o r e o f k e y i n g i n
programs from this issue w i t h our cassette.
Editorial
SOFTWARE
Programs galore — but are they all they claim
to be 7 Our frank reviewers give you the facts
A SUPERB
RESPONSE
UPGRADE
Part I I o f our Beeb Body-building Course
explaining h o w t o turn an ' A ' i n t o a •B'.
WORKSHOP
Discover t h e R O M s action addresses w i t h
our helpful keyboard listing program.
COMPETITION
Win a year's supply o f software b y taking
over where o u r missing Percival left off.
9
9
ERROR-TRAPPING
Have fun w i t h y o u r horoscope — and learn
the best w a y s t o avoid operator errors_
SHOWTIME
1
P
9
Mget-togethers fatr the BBC Micro User Show. ..../
a k e a date o the first o f our national
BITS & BYTES
Binary code — the key t o understanding the
inner workings o f your BBC Micro.
MEASUREMENTS
How your micro can b e interfaced t o
become a powerful research tool.
DISC-OVERY
The formatting program t h a t gives you a
much w i d e r choice o f disc drives.
DISASSEMBLER
What is that machine code doing? This
program lets you see w h a t s going on.
MICROMAIL
An avalanche o f letters greeted o u r first
issue. Here's a small selection o f them.
SAVE M O N E Y !
Your last chance o f a E2 saving on the cost
of a year's subscription t o BBC Micro User,
9
9
9
WELCOME to the second edi-
tion o f B B C M i c r o U s e r —
larger and more colourful than
the last!
I w a s overwhelmed b y t h e
response t o t h e f i r s t edition.
Thanks f o r a l l the letters, a n d
please keep them coming in. Every
one i s read and the points they
raise seriously considered.
I'd be grateful if you would give
your telephone number as well as
your full address — i t would be
impossible for me to reply to all of
your letters, but it's nice to have the
option.
This month sees the start of Bits
and Bytes, a series for non-experts
that w i l l eventually lead u p t o
assembly language programming.
There were also requests f o r
more of the -hard stuff—. Well this
month, as well as discussing the
Basic keywords' action addresses
in Programmers' Workshop, w e
give a full listing for a hex dump/
disassembler. I n future issues we
shall be using this t o probe the
working of the BBC Micro's ROM.
Deathwatch produced a large
crop o f letters, almost all praising
the game highly. One or two people
had difficulty typing it in. The BBC
Micro seems t o b e particularly
prone to "invisible" typing errors,
so we've devoted a whole article to
typing in listings. Let's hope that
solves some problems.
Mind you, ive didn't make the
task of typing the programs in any
easier by providing you with list-
ings t h a t were faint i n places.
Sincere apologies — it won't happen
again. Oddly, onlv a couple o f
letters mentioned that problem —
you're a very charitable lot!
The response to the review o f
monitors was gratifying. I t seems
there is a huge demand for objec-
tive tests o f hardware, so we've
provided some test card programs
for monitors. We shall be doing
reviews of discs and printers soon.
Is there an vane out there who
can give us a n objective set o f
benchmark programs that we can
use as criteria for evaluating these?
I f so, we would be glad to hear
from you.
The same goes for would-be con-
tributors. We have already received
some excellent a r t i c l e s a n d
programs, but are always on the
lookout for more.
April 1 9 8 3 B B C MICRO USER 5

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin