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Acorn User Welcomes Submissions Irom Readers L BRITAIN'S BlGGFST MAGAZINE FOR THE BBC MICRO ELECTRON • ATOM OCTOBER 1984 £1 TRAILBLAZERS: The origins of life on a BBC micro CARTOON ANIMATION Move your characters around the screen UNCOVERED! ACORN'S BUSINESS COMPUTER DOUBLE MEASURE... Twice as much storage capacity on your present or proposed discs. The LVL true double density printed circuit board offers an amazing 1,474,560 Bytes of on-line storage, on a twin 80 track double density drive. density). In it's Removed is the 8271; (it is not capable of supporting double support place, a small printed circuit board with a new disc controller and circuitry provides a much improved data retrieval. This drastically reduces read errors by using a phased locked loop data separator, which is superior to the standard window circuit. drive, and inform Your BBC micro will now recognise the media density in the density you require, 40 or 80 track, and you if it is correct. You may define what which sides of the disc to use. The device gives complete flexibility and comes with an Eprom containing firmware; manual, and a 40/80 track utilities disc. On a dual drive it is simplicity density. itself to copy existing software from single density to double • Double Density • 40 or 80 track • Automatically • Own PCB with checks for correct seperate 8Mhz density clock • No 8271 (Rare& • Simple to fit expensive) • User definable • Utilities provided density • Defaults to single • Phase lock loop density on power data separator up circuit. Scientific House, Bridge Street, Sandiacre Nottingham. NC10 SBA Telephone (0602) 394000 ! 2Q000K Winchester Disc for your BBC Micro INTEC MAKES THE BBC REALLY COMPETE WITH SYSTEMS COSTING 2X AS MUCH -itfTg> *•' Supports BBC and Acorn DFS. The INTEC 5o5 gives all these benefits PLUS the hard disc cartridge providing a compact, Full file handling and diagnostic software utilities. removable secure and usable back-up or cartridge per application Data capacity from 5 Mb upwards. approach. Why pay more for less? High speed accessing. For full details on the INTEC range of hard discs for the UK manufactured. BBC Micro, complete and post the tear-off slip or phone INTEC now- 01-761 5999. INTEC 41A-45 Knights Hill West Norwood, London SE27 OHS Telex 8813271 GECOMS G THE ONE AND ONLY BBC, ELECTRON AND ATOM MAGAZINE Chipping in Users 81 New By programming the Beeb's 8271 floppy disc controller chip you can First Byte 33 increase your data-handling power, Keyboard capers Start making music says Richard Harris and other noises on your Electron, under the baton of Jeremy Vine All sorts 117 See how sorting techniques work and Fly Killer Tessie Revivis's asterisk you'll soon be able to pick the right turns into a full-blown fly that runs the one for the job. George Hill sorts them gauntlet of the spray can. Design and out move your own screen characters with deadly accuracy Self-diagnosis 123 Hints & Tips 51 In the interests of cost-cutting and October 1984 No 27 keeping your micro on the road, Paul Martin Phillips explains points that Beverley helps you set up tests on the perplex readers: printing with Beeb to diagnose its own ailments daisywheel and dot matrix connected Editor Tony Quinn at the same time; outmoded operating Production editor Keith Parish systems; a scrolling text window; off- Technical editors Alex van Someren, the-shelf procedures; and the Education Bruce Smith ENVELOPE statement Editorial assistant Kitty Milne Primary scream 133 Art editor Nigel Wingrove Letters 59 The government claims success for its Art assistant Frances King What's on readers' minds? The 6502 'micros in primary schools' scheme, Publishing director Michael Potter second processor, professional but is it of much help in practice? To Editorial director Christopher Ward typesetting from wordprocessors, Geoff Nairn the satisfied smiles look Editorial high-scoring hit men, comparative like smugness Redwood Publishing, reviewing 68 Long Acre, London Modules by Microtext 137 WC2E9JH. Tel: 01-836 2441 Dear Kitty ... 62 Ian Birnbaum assesses Advertising What's the difference between ROMs Acornsoft's Microtext authoring Computer Marketplace Ltd, 20 and EPROMs? How do I know which system, which allows even Orange St. London WC2H 7ED. software to buy? inexperienced programmers to set up Tel: 01-930 1612 instructional quizzes and tests on the Subscriptions Features Beeb Jan Potter, Subscriptions manager. Tel: Nutfield Ridge 2957. (073782) Trailblazers 27 Correspondence: Redwood Pub- Atom lishing, 68 Long Acre, London In the first in our new series focusing WC2E 9JH. on the more exotic uses that the Beeb 143 is being put to, Chandra Wordprint Annual subscription rates: Wickramasinghe explains how his Alex Wilson provides Atom users with UK £15 micro helped him advance a startling a wordprocessor that makes full use Europe £25 theory of life in space of all script facilities Middle East £30 The Americas and Africa £30 listing Rest of the World £35 Yellow pages Prices include p&p lor 12 issues You'll find all the main listings of this Acorn User welcomes submissions Irom readers. issue in the yellow pages Articles should be typed, double-spaced text, with dia- grams on separate sheets. Please enclose programs on First Byte 97 disc or cassette, with a listing if possible. Photos should be 35mm, or larger, transparencies, or 5in by 7in black Our fly gets its come-uppance and white prints. Ensure your name is on everything. Please include a suitable stamped, addressed envelope Hints & Tips 99 3 tor return. Articles are acknowledged on receipt. Simple envelope generators Animated sprites 100 Typeset and printed in Great Britain by Watmoughs Ltd. Bradford. Print production by Move your character around 4 Aquarius Print and Design, London. Distributed 8271 programmer 102 rssaasr— to the news trade by Comag, Tavistock Rd, West Drayton, Middlesex UB7 7QE. Tel: (0895) 44405. Disc copier Beeb Forum 103 Redwood Publishing 1984 © Disc catalogue reader All rights reserved. No part of this publication may be reproduced without prior written per- Sorting 104 mission of the publisher. The publisher cannot Demonstrated in colour! accept any responsibility for claims or errors in articles, programs or advertisements pub- Self-diagnosis 107 lished. The opinions expressed on the pages of Choose a test routine this magazine are those of the authors and do not necessarily represent those of the pub- Atomic text 109 lisher, Acorn Computers Ltd, or Acornsoft Ltd. Wordprocessing on a shoestring Acorn, Acornsoft, and the Acorn symbol are the 112 registered trademarks of Acorn Computers Ltd Toolkits and Acornsoft Ltd. Sample utilities ACORN USER OCTOBER 1984 . CONTENTS Communications IN THIS Bulletin boards 167 The social side of communicating by ISSUE. computer is represented by bulletin boards, or free public access systems. Jeff Ashurst briefs you on how they Origins of Life 27 operate, the equipment you'll need to Chandra Wickramasinghe become a registered user, and which explains how he and Sir BB to join Fred Hoyle are using the humble BBC micro to help Reviews them research the origins of life on Earth and back up their theories on microbes Toolkit trials 157 coming from space Bruce Smith compares a fistful of Basic utility ROMs Elite squad 165 Elite is Acornsoft's secret new space game. Tony Quinn is our test pilot . Games 173 Blagger and Bugblasterhom Alligata; Horse Race. Pool. Corporate Climber Cartoon time 65 and Lemming Syndrome from Dynabyte; Screenplay's Chickaroo; How to move the sprites First Byte's Star Trader: DACC's designed last month. Look Super /compendium; Trench by out for the free Virgin; One to Nine by Acornsoft; and demonstration to download A Maze in Space by Opus on Micronet and Viewfax EXCLUSIVE 7 Hardware 185 Acorn's new computers Sideways ROM sockets by Viglen and ABC is the name for the company's NMC give convenient and cheap new range of business machines. expansion on the Beeb. Chris Drage Read the facts, not the guesswork compares them Utilities 190 Bearsoft's Editor ROM; Watford's This plug K»s COB* < rom an Buffer and Backup ROM; and electric firt Ampersand's Colour Module Acornsoft's Microtext 137 Ljf The National Physical txmnf It Laboratory developed this to find out Regulars wftat la wrong language to help people \ The News 7 who were new to programming write training ing wrong lr-#n Acorn's ABC - the specs, the facts; the but I would and educational software. prtt«r an tnswtr tnoogn Electron Plus 3, with 3in disc drive; wrong"* instant program-entry with the MEP's Ian Birnbaum reveals how bar-code reader; software on cable TV well it succeeds Beeb Forum 113 IIIIIIIIIIIIIINIIIIIIIIIMIIIIIIIMIIIIIIIIII Bruce Smith presents . NFS update; NEXT MONTH. security for data files; testing the Bar codes come of age RS423; and finding the file-length We preview the MEP bar-code reader and present listings that inn Top 20 software 155 can be input using this device Curse you, Caveman! Buggies and Turtles Six of these robots for schools i mi i ii i ii Free ads 201 and hobbyists are given a thorough going-over Small ads 207 Sideways ROMs mi i ii Joe Telford studies the popular Acorn Abuser's Diary 184 chips and what will work with second processors Curried eggs and cabbages mi ii i ii iih i 1 1 mi i limn ii ii ii iiini m m ACORN USER OCTOBER 1984 . A 100k BBC-drive for £99 + VAT We've done it! We've built a mass PHLOOPY's special secret storage system for your BBC Micro The heart of the invention with the power and convenience of a is a brilliantly designed floppy disk drive, but at a fraction the "byte- wide" magnetic head, price.
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