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insisting on calling ellipses eclipses! There is also the following piece of waffle. Having positioned the centre of the circle, the second point selected in the CIRCLE must be at 45 degrees to the first point or an ECLIPSE (sic) will be draw'. The problem is that two points can never be at an angle to each other - they are joined by a straight line so the above is nonsensical. What I think they meant to say was that if you imagine a vertical line drawn through the first dot, then the second dot can subtend an angle of 45 degrees to that line. In other words, if north is at the top of the screen, then you get a circle if the second dot is at NW, NE, SE or SW, Anywhere else results in an ellipse. Using the light pen itself, is an acquired art. You don't need to apply pressure but you do have to ensure that the pen is flush with the screen - not always easy with a curved screen. My own personal experience is that they are unwieldy and cumbersome to use CURRENT TITLES Ace Ace (64K version) Beach Head Bomb Jack Bongo Commando Corman Defence 16 Football Manager Grand Master Chess Home Office Kingsize 50 Games Mercenary Mercenary 2nd City Reach for the Sky Rescue from Zylon Robin to the Rescue Steve Davis Snooker Sword of Destiny Winter Olympics World Cup Football World Series Baseball Yie Ar Kung-Fu Monty on the Run Dirty Den Matrix & Laserzone Winter Events Major Blink ( 6 7 Atk a- C16 & PLUS/4 REVIEW n and offer no advantage whatsoever over traditional graphic packages. The advent of the mouse or even the humble joystick has all but killed their use for computer applications, It is only as bar code readers have they found any great commercial value. Poor documentation and software (the BUDGET RANGE 8.45 Atomic Mission 9.45 Bandits at Zero 4.99 Big Mac 6.99 BMX Racers 4.99 Climb it 8.99 Corman 2.99 Dorks Dilemma 6.99 Droid One 5.95 Exorcist 7.99 Fingers Malone 8.99 Flight Zero 15 8.99 Formula 1 Simulator 8.99 Gnasher 4.99 Golf 5.99 Gremlins 5.99 Harbour Attack 5.99 Hektik 6.99 Hustler 5.99 Incredible Hulk 5.99 Jail Break 5.99 Jetbrix 7.99 Lawn Tennis 6.99 Lone Survivor 5.99 Lunar Docking 6.99 Mayhem 5.99 Meteorite 6.99 Mission Mars 5.99 Mr. Puniverse 117 OLIEENSWAY, BLETCHLEY MILTON KEYNES MK2 2DH 21 1 M I L TROJAN LIONTP(N CC)1886 THIN IE BOX • DRAM • NEW QUILLS BAND. • BRUSH • ERASE •UIL2 • RAYS • COPY OISIL3 • LINE IN HASH !THICK • TRIA. • SAVE XDOT • CIRC. • LOAD • BORDR • • • BRI • • PENA • • PEN2 • • MIT • FILL U PRINT IN PEN3 DOTLI • TEXT • LOOK • BACK YOUR COMMODORE january 1987 70 PLUSAII VERSION 1.0 program crashed on me half way through a picture with array problems) mean that this package cannot be recommended. Touchline Company: Compuler Cupboard, Freepost London W5 MR. Price: 1'19.95 C16 AND PLUS 4 OWNERS SOFTWARE AT BARGAIN PRICES 2.99 1.99 SPEND EIO 1.99 1.99 1.99 RECEIVE A FREE SOF 2,99 2.99 TW P 2.99 2.99 1.99 2.99 1.99 2.99 2.99 2.99 2.99 1.99 2.99 2.99 2.99 2.99 3,99 3.99 2.99 2.99 2.99 2.99 1.99 Oblido ARE R One Man and Ehis Droid Pirate Adventure (cartridge) Return of Rockman S Robo Knight Rockman E Runner N Shoot It Slippery Sid T Solo Spectipede Strange Odyssey (cartridge) Street Olympics Torpedo Run Tuti Fruiti Viduzzles (cartridge) Vox Zap Em Booty Speed King 1.99 1,99 3.99 1.99 2.99 1.99 1.99 2.99 1.50 2.95 1.99 3.99 1.99 1.50 1.99 3.99 3.99 2.99 1.99 1.99 ALL ORDERS ADD 25p PEA ITEM FOR P&P. SAME DAY DISPATCH. VISA
Y listings o are free of those horrible little black u blobs which send you searching around m the keyboard for a suitable graphic symbol. You may also have noticed a the funny numbers by the side of y each line of the listing. Fret no more, it's h all part of our easy entry aid. a Instead of those nasty graphics arid rows v of countless spaces in PRINT statements e and strings we use a special coding system. The code, or mnemonic, n is always contained in square o brackets and you'll soon learn to t decipher their meanings. i For example, ISA] would mean type c in a Shifted A. or an ace of spades in elayman's terms, and [SAI01 would mean d a row of ten of these symbols. [S+2I means hold down the shift key t and press the plus key twice. It doesn't h take a great leap of logic to realise a that [C+.2] means exactly the same t thing except that the <strong>Commodore</strong> o key (bottom left of the keyboard) is uheld down instead of the shift key. r If more than two spaces appear in a statement then this will be printed as [SPC41 or, exceptionally, [SSPC41. Translated into English this means press the spacebar four times or in the latter case hold the shift key down while you do it. A string of special characters could appear as: [CTRL N, DOWN2,LEFT5,BLUE, F3,C3] This would be achieved by holding Easy Entry C64 Listings Get it right first lime with our deluxe program system for the C64. down the CTRL key as you press N, press the cursor key down twice, the cursor left key five times, press the key marked BLUE while holding down the CTRL key, press the F3 key and, finally hold the <strong>Commodore</strong> key down while pressing the number two key (C2 would of course make the computer print in brown). Always remember that you should only have a row of graphics characters on your screen with no square brackets and no commas, unless something like this appears: ISS1,1C*] In this case the two characters should have a comma between them. On rare occasions [REV T1 will appear in a listing. This is a delete symbol and is created by entering the line up to this mnemonic. Then type a closing quotation mark (SHIFT & 2) and delete it. This gets the computer out of quotes mode. Hold down CTRL and press the number nine key (RVSON), type the relevant number of reversed T's and then hold down CTRL and press zero (RVSOFF). Next type another quotation mark and delete it again. Now finish the line and press RETURN. A list of these special cases is given in the table but remember that only one of these mnemonics will appear outside of a PRINT string: the symbol for pi. This may appear when its value is needed in a calculation Sc) this may look something like: YOUR COMMODORE january 1987 71 :CC; -Ignore the square brackets and just -type in a shifted upward pointing arrow - (ie. the pi symbol), 2*[P I I]*R 1 5 REM sTrAx CHECKER - ERIC DOYLE : - ! 10 BL.1.0 ; 5 P P . 4 5 1 5 2 20 FOR L-0 TO 131..CP.O.FOR 0-0 TO T 15 h 30 READ FlIF A'255THENPRINT"NUMB • ER TO LARGE".LN.CLo10)5TOR m 40 CKCX ; E Y N T A X C H E C K E R -1- SO READ A:1F A›
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