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HAVEN HARDWARE STILL THE WORLD'S LARGEST RANGE OF ZX HARDWARE AT THE LOWEST PRICES (Prices include VAT and postage) SM US at th* Edinburgh ZX Show. FULL SIZE KEYBOARD WITH REPEAT KEY AND SINGLE KEY RUBOUT & CURSOR CONTROLS Specially designed for the Sinclair, this keyboard was the first to include these features. WHY PAY MORE FOR AN INFERIOR COPY? KIT ONLY £19.95 BUILT £21.95 (Repeat & Single key entry £1.00 extra). REPEATING KEY MODULE One of the most successful ZX ADD-ONS ever created. Fits inside ZX81. TENS OF THOUSANDS OF SINCLAIR COMPUTERS ALREADY HAVE THIS FACILITY. Available for ZX80 (KIT £2.50) or ZX81 KIT £3.50 BUILT £4.95 • CAN BE USED WITH ANY KEYBOARD • PROGRAMMABLE CHARACTER GENERATOR THE FIRST AND STILL THE BEST With free HIGH-RES graphplotter. No Motherboard required. Can be used with 16K Memory etc. Charaters can be printed directly onto the ZX printer. Full software control. KIT £17.95 BUILT £24.95 ZX81 INVERSE VIDEO MODULE BUILT £5.95 ZX80 COLOURBOARD KIT £39.95 BUILT £49.95 ZX EDGE CONNECTOR £2.30 (GOLD PLATED) ZX INPUT/ OUTPUT PORT Interface your computer to the outside world. 8 Inputs and 8 outputs with positions for LEDS and clock. KIT ONLY £7.95 BUILT £11.95 ZX 3K MEMORY The cheapest small memory expansion available anywhere. Uses very reliable static RAM. BUILT ONLY £12.95 KIT £11.95 ZX SPECTRUM EDGE CONNECTOR £2.95 OTHER PRODUCTS Motherboard, Numeric Keypad, Bleeper, Single key entry module & various Software cassettes. SAE FOR DETAILS SHEETS, COMPONENTS PRICES & ORDER FORM HAVEN HARDWARE, ZX DEPT 31, 4 ASBY ROAD, ASBY, WORKINGTON, CUMBRIA CA14 4RR. 32 ZX COMPUTING AUG/SEPT 1982 24
word Games The spectral Hangman rides again Whether you have a zx spectrum or a ZX81, you'll be able to run these two programs. The first, SPECTRAL HANGMAN, chooses the words you must guess. The second,, TILE CRAZY, dares you to use your brain. 'Spectral Hangman' is straight forward. The computer chooses a word from its list — kept in the DATA statements in the Spectrum version, and in a series of LET lines in the ZX81 program — and then gives you a limited number of guesses (bas- SPECTRAL HANGMAN ed on the length of the word) to get it right. The vocabulary for either program can easily be extended. Notice how much more compact the Spectrum version is compared with the listing for the ZX81. The second program, 'Tile i D REM S p e c t r a l Ha n q ta a n £0 RE?-? £> K Mahogany . 1Q&S 3Q FOR ^-1 TO RND*S5fi = RERD a$ ~ 50 NEXT q — 50 LET nsLEN 3$ EE 70 DIM b !n) . DIM d in) = 53 FOR 3=1 TO n . = LET b;si-CODE a$tgj ~ 1_ET d IQ) = b tOJ = 110 NEXT 3 — 120 FOR J =1 TO n +n ss ill ggx5¥ B -" ? ink R » . 6 ; - M t . r • our a o e 3 s no. • j = £00 INPUT c $ = 510 LET f»CODE C$ I 111 LET d< S»=0 £40 NEXT ? — £60 NEXT J I • I70 pbint ink 3.; "Sorry, time iS up ! " £50 GO TO 33© REM * * * * Win **** . . il© PRINT ' INi'v 4..; TAB 4-.. Ue I t * 320 PRINT ' INK 4., "YOU 901 the ' l i t ^ x ^ ' W ^ K , word «• " ' 3 $ " w35 PRINT '' INK RND*5.; "Press a = n Key for a new gafftfi" = 340 PRUSE 464. E ? = © RUN ^ „ DRTR "feature"., "spectrum caibrid«e"/ , hazafd"."pu»piiin" 32 ZX COMPUTING AUG/SEPT 1982 25 Crazy', produces a 4 x 4 square, containing the letters A to L in a random order. Your task is to put them back in alphabetical order, moving tiles into adjacent empty squares. Notice how the Spectrum version uses the INPUT option of having words within quote marks {lines 90 and 130). If you want to change the starting order, alter the two DATA lines in the Spectrum program, and A$ (see line 345) in the ZX81 version. 573 DATA t ion", "qwir f * «- • " ."uncle" . " r e c o r d e r " :sn data 'taii c"," formula .» - s -. y " . " resource " .. " be 11 e r " DATA " bu 11 e r " .."st rawbe r r y .. ;o t h e r som a " .. " a t o m " .."so r cere r " ieei drta " wizard " .. "wickedly'*.. "e m " . "wan ton " .. "wande re r " 0' LET h = 0 415 FOR 8=1 TO n j. jp b(ai=dl£) THEN PRINT INK i l * I F B(E) D(E) THEN PRINT IN K RND*S.CHR$ t B (E > ) .. : LET h=h+l. LEEP ,25.. h ; 40 NEXT e -45 S ORT ER RND IK «". = n TMtN GO TO 300 460 PRINT ' INK 0, PAPER S, \ OU have auessed INK RND*5.;K; Tri r " l e t t e r " ; 470 IF h < >1 THE PRINT PAPER 6. > — 11 4S0 PRINT 4 90 RETURN En t e r your y u e s s no. o i ~ ou have guessed l l e t t e r Znter your yuess no. 4. be —e - * u have guessed 3 t e t t e r s
Page 1 and 2: QsMTPQMK]® Britain's Biggest FOR T
Page 3 and 4: Fully cased keyboard £37.95 Uncase
Page 5 and 6: ZX Computing is published bi-monthl
Page 7 and 8: So as a business machine it really
Page 9 and 10: r « te i? ell ce • No-one asked
Page 11 and 12: "...the quality of the colour displ
Page 13 and 14: as ! Cassette £6: Fun to Learn ser
Page 15 and 16: to n The following week, at a ZX Mi
Page 17 and 18: ZX COMPUTING AUGUST/SEPT 1982 17
Page 19 and 20: an )ms 2 at ing out TO, if wn md th
Page 21 and 22: 2 9000 901© I" C'LS PRINT 9020 PRI
Page 23: two ; rom and The J as sive >!ied ;
Page 27 and 28: " 260 PRINT CHR5 FL (133 ;CHR$ CHR$
Page 29 and 30: 32 The second program, MPRF, is a g
Page 31 and 32: 795 5'00 •BIG S20 33© 1O0) 540 )
Page 33 and 34: The printout shows you what the scr
Page 35 and 36: OHMRND" 90 PRINT RT 1 3 , 2 ; " N ,
Page 37 and 38: 18 PRINT "NUMBER OP WORDS TO E £ S
Page 39 and 40: 'LIT N y RRT >' • m / L- >y R . u
Page 41 and 42: shown in the manual, then typing in
Page 43 and 44: Graphics The PLOT thickens The IF..
Page 45 and 46: Construction c 1 1 1 1 32 Bit 7 Bit
Page 47 and 48: ions cuit only :on- The eys y to at
Page 49 and 50: !28240 • Lines 390 to 480 single
Page 51 and 52: 1 There's no special reason for our
Page 53 and 54: [ Sample printouts from J. K Graye
Page 55 and 56: I V i If you've ever struggled with
Page 57 and 58: 5 PRINT "SEEK" 10 DIM P(2) 20 DIM Z
Page 59 and 60: Machine Code Figure 1. 01 1A00 LD B
Page 61 and 62: Book reviews Caring for your comput
Page 63 and 64: is a characteristic of earlier Time
Page 65 and 66: Sorting it out This utility program
Page 67 and 68: Colourthello is intended to highlig
Page 69 and 70: 0 Level Physics Paul Holmes from Su
Page 71 and 72: DO you use A CASserre DCCH WITH YOU
Page 73 and 74: 60 PRINT BT 2,3; M i i W M T T T f
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ZX81 Spectrum 16K 1 MANAGEMENT GAME
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Some BASlCs do not allow a computed
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t an ling idile it /erto the EN >nt
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AS and B$. A$ holds information con
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220 LET B1=P 225 LET Lfl=i 230 LET
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Vegas Breaker Chuck Hopper's progra
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y y Personal Software is a new quar
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ZX80 Carries 150 LET D = 0 350 IF B
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Graphics User-definable graphics Th
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frame counter as a timer use this r
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Specialist Book$ Choosing program*
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The Spectrum Listing 5 REM * MRTCHS
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Make sure you get every issue of ZX
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Business Keeping tabs on your chequ
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JRS SOFTWARE 19 WAYSIDE AVENUE. WOR
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11SO GOTO 1030 1150 LET X$ = X $ (
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The variables used are as follows;
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MELBOURNE HOUSE • ZX81 • SPECTR
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L£T B=B+1; BEEP .2,B*2S -4.0 LET G
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5 REM Pro g r am three 10 LET a$=CH
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2° Cassette E3: Fun to Learn serie
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ZX80 Dimensions Width 174mm (6.85 i
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Mathematical Operations And Functio
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FULLER FD SYSTEM £39*95 Profession
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