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RL.IEN CRAFT IS TO THE NORTHUE5T IN FRONT OF US ENERGY 6 4-6 ERGS GSHIP IS CRUISING RT THE CQ-ORDINFITES: O 5 S ENTER YOUR COMMFIND N,S,E,U (L) RSER . (ANOUFLNCE KR.IETRERT TIME: L TRULY space Shootdown 34 O 1© REM BETUEEN THE STRRS 2© REM BY ROGER HHCINTYRE 30 GOSUB 1070
OHMRND" 90 PRINT RT 1 3 , 2 ; " N , S , E t U , ( D O 5ER, " , "(R)DUfiNCE,(R)ETREfiT" 100 LET L - L - 0 . 2 S 120 IP INKEY$ =" ** THEN GOTO 120 130 IF INKEV$="L" THEN GOSUB 32 0 1 0-5 THEN GOTO 40 2 4.0 LET R-R + INT < ( RND * 3 ) - < RND * 3 ) ) 250 IF R 10 THEN LET R = 1Q 260 LET B =B + INT ( ( RND *3"j - I RND *3 ) ) 265 266 270 280 ) ) 290 300 IF B >10 THEN LET 5-10 IF B 0.5 THEN GOTO 4-Q LET C=C + INT ( (RND*3) -(RND*3 IF C10 THEN LET C=10 310 GOTO 4-0 320 REM ** FIRE LRSER ** 330 LET L=L-0.75 34-0 PR INT RT 1,0; _ _. 350 IF RBS 3 OR RB5 (B-Y> >3 OR RBS (C-Z> >3 THEN PRINT RT 1,0;"OUT OF RANGE..." 360 FOR U = 1 TO 50 370 NEXT U 375 PRINT RT 1,0;T$ 330 IF RBS (R-X)>3 OR RBS (B-Y) >3 OR RBS (C-Z)>3 THEN RETURN 390 PRINT RT 1,0;"ORDER TO FIRE UNDERSTOOD" 400 FOR U = 1 TO 50 410 NEXT J 415 PRINT RT 1,©;T* 420 IF RND3 OR RBS (B — Y) >3 OR RBS tC-Z) >3 THEN RETURN 650 IF RND>0.75 THEN RETURN R L I E N S 660 PRINT RT FIRING RT US M W T ' 670 FOR J = 1 TO 50 680 NEXT U _ _ 690 PRINT RT 1,0JT* 700 IF RND>0.7 THEN GOTO 7*70 710 PRINT RT 1 , 0 ; " 1 RLIEN FIRE HRS HIT US '20 730 IF L +1 1180 LET Y = INT i RND * 10 i +1 1190 LET Z = INT v RND * '10.* 1195 LET S$ = " 1197 LET T$=" 1200 FOR U=0 TO 83 1205 PLOT U,0 1210 PLOT U , 4-3 1220 NEXT U 1230 FOR U=0 TO 4 1240 PLOT 0,U 1250 PLOT 6 3 , J 1250 NEXT U -1270 RETURN <strong>ZX</strong> COMPUTING AUGUST/SEPT 1982 35
Page 1 and 2: QsMTPQMK]® Britain's Biggest FOR T
Page 3 and 4: Fully cased keyboard £37.95 Uncase
Page 5 and 6: ZX Computing is published bi-monthl
Page 7 and 8: So as a business machine it really
Page 9 and 10: r « te i? ell ce • No-one asked
Page 11 and 12: "...the quality of the colour displ
Page 13 and 14: as ! Cassette £6: Fun to Learn ser
Page 15 and 16: to n The following week, at a ZX Mi
Page 17 and 18: ZX COMPUTING AUGUST/SEPT 1982 17
Page 19 and 20: an )ms 2 at ing out TO, if wn md th
Page 21 and 22: 2 9000 901© I" C'LS PRINT 9020 PRI
Page 23 and 24: two ; rom and The J as sive >!ied ;
Page 25 and 26: word Games The spectral Hangman rid
Page 27 and 28: " 260 PRINT CHR5 FL (133 ;CHR$ 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: The printout shows you what the scr
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
Page 75 and 76: ZX81 Spectrum 16K 1 MANAGEMENT GAME
Page 77 and 78: Some BASlCs do not allow a computed
Page 79 and 80: t an ling idile it /erto the EN >nt
Page 81 and 82: AS and B$. A$ holds information con
Page 83 and 84: 220 LET B1=P 225 LET Lfl=i 230 LET
Page 85 and 86:
Vegas Breaker Chuck Hopper's progra
Page 87 and 88:
y y Personal Software is a new quar
Page 89 and 90:
ZX80 Carries 150 LET D = 0 350 IF B
Page 91 and 92:
Graphics User-definable graphics Th
Page 93 and 94:
frame counter as a timer use this r
Page 95 and 96:
Specialist Book$ Choosing program*
Page 97 and 98:
The Spectrum Listing 5 REM * MRTCHS
Page 99 and 100:
Make sure you get every issue of ZX
Page 101 and 102:
Business Keeping tabs on your chequ
Page 103 and 104:
JRS SOFTWARE 19 WAYSIDE AVENUE. WOR
Page 105 and 106:
11SO GOTO 1030 1150 LET X$ = X $ (
Page 107 and 108:
The variables used are as follows;
Page 109 and 110:
MELBOURNE HOUSE • ZX81 • SPECTR
Page 111 and 112:
L£T B=B+1; BEEP .2,B*2S -4.0 LET G
Page 113 and 114:
5 REM Pro g r am three 10 LET a$=CH
Page 115 and 116:
2° Cassette E3: Fun to Learn serie
Page 117 and 118:
ZX80 Dimensions Width 174mm (6.85 i
Page 119 and 120:
Mathematical Operations And Functio
Page 121 and 122:
FULLER FD SYSTEM £39*95 Profession
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