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170 180 1990 1995 2000 200 5 2010 2012 2014 2015 2016 2017 2020 IF ABS(C - B) - 10 OR ABS(C ~B) rn 3 THEN PRINT "MULTI-JVMP?" IF ABS(C - B) = 10 OR ABS(C - B)* 8 THEN INPUT U$ CLS IF U$ > "" THEN GOTO 2 FOR Z • 6 TO 40 IF Z < 9 THEN GOTO 2015 IF A (Z) < 0 AND (A(Z - 4) " 1 OR A (Z - 4) - 2) AND A(Z - 8) - 0 THEN GOTO 4090 IF Z < 11 THEN GOTO 2015 IF A (Z) < 0 AND (A(Z - 5) = 1 OR A(Z - 5) = 2) AND A(Z - 10) * 0 THEN GOTO 4200 IF 2 > 25 THEN GOTO 2020 IF A(Z) - - 2 OR (A (Z + 4) = 1 OR A(Z + 4) « 2) AND A(Z + 8) = 0 THEN GOTO 4 300 IF A(Z> « - 2 AND (A(Z + 5) = 1 OR A(Z + 5) = 2) AND A(Z + 10) = 0 THEN GOTO 4400 NEXT Z • • ZX80 Games RANDOM MOVE INTELLIGENT 4005 LET KK - 0 4007 LET U " 0 4010 LET Z «= 6 + RND (35) 4012 LET K - 0 4015 IF U > 199 THEN LET KK = KK + 1 4016 LET U = U + 1 4020 IF A(Z) < 0 AND A(Z - 4) = 0 THEN LET K * 1 4026 IF A(Z) < 0 AND A(Z - 5) = 0 AND K ' 0 THEN LET K » 2 4029 IF K " 0 AND Z < 26 AND A(Z) - - 2 AND A(Z + 4) - 0 THEN LET K = - 7 4035 IF Z < 10 THEN GOTO 4040 4038 4039 4050 4051 IF K - 10) 1 AND U < 200 AND A(Z ' 1 THEN GOTO 4010 IF K - 2 AND U < 200 AND A(Z - 10) " 1 THEN GOTO 4010 4045 IF K - 0 AND KK < 350 THEN GOTO 4010 IF K " 0 THEN LET SM « 12 IF K - 0 THEN GOTO 2 4072 LET A(Z - (3 + K))- A(Z) 407 3 LET A(Z) « 0 4077 GOTO 2 SAVE 4092 LET A(Z - 8) = A(Z) 4095 LET A(Z) - 0 4100 LET A(Z - 4) = 0 4105 LET SI - SI + 1 4107 IF Z < 24 THEN GOTO 2 82 ZX COMPUTING SUMMER 1982 TO
4110 IF (A(Z - 13) = 1 OR A(2 - 13) = 2 ) AND A(2 - 18) = 0 THEN LET P - 1 4115 IF (A (Z - 12) - 1 OR A(Z - 12) * 2) AND A(Z - 18) - 0 THEN LET P - 2 4i20 IF P = 1 THEN LET A(Z - 18) » AfZ - 8) 4130 IF P = 1 THEN LET A (Z - 13) - 0 4140 IF P =< 2 THEN LET A(Z - 16) - Afz - a; 4J50 IF P = 2 THEN LET A(Z - 12) = 0 4160 IF P > 0 THEN LET A (Z - 8) = 0 4170 GOTO 2 4200 LET A(Z - 10) « A(Z) 420 5 LET A(Z) = 0 4210 LET A(Z - 5) ' 0 4212 LET SI » ST + 1 4215 IF Z < 2 5 THEN GOTO 2 4220 IF (A ( Z - 15) - 1 OR A(Z - 15) = 2) AND A (Z - 20) = 0 THEN LET P - 1 4230 IF(A (Z - 14) = J OR A(Z - 14) = 2) AND A(Z - 18) - 0 THEN LET P - 2 4240 IF P " 1 THEN LET A(Z - 15) = 0 4250 IF P - 1 THEN LET A(Z - 20) = A (Z - 10) 4260 IF P " 2 THEN LET A(Z - 14) = 0 4270 IF P " 2 THEN LET A(Z - 18) * A (Z - 10) 4280 IF P > 0 THEN LET A(Z - 10) * 0 ZX COMPUTING SUMMER 1382 ZX80 Games 4290 GOTO 2 4300 LET A(Z + 8) = - 2 4310 LET A(Z + 4) » 0 4320 LET A(Z) = 0 4330 LET SI " SI + 1 4340 IF Z < 32 AND (A(Z + 3) = 1 OR A (Z + 3) " 2) AND A(Z - 2) - 0 THEN LET P = 1 4350 IF Z < 23 AND (A(Z + 14) - 1 OR A(Z + 14) - 2) AND A(Z + 16) - 0 THEN LET P - 2 4360 IF Z < 23 AND (A(Z + 13) - 1 OR A(Z + 13) = 2) AND A (Z + 18) = 0 THEN LET P « 3 83
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j Summer Britain's Biggest Magazine
Page 3 and 4:
ZX 80/81 HARDWARE/SOFTWARE ZX KEYBO
Page 5 and 6:
ZX Computing is published quarterly
Page 7 and 8:
16K-byte RAM pock for massive add-o
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The @*?$1!&£@ RAM pack Dear ZX Com
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I u < o •0 8 & £T © Benchmarks
Page 14 and 15:
1 1© L" 20 30 IN5 5 0 60 80 9C 100
Page 16 and 17:
The Explorer's Guide to the ZX81 IF
Page 18 and 19:
Orbit S M King from Bristol takes y
Page 20 and 21:
ID 15 20 25 30 35 4G> LBV 5 NMER RE
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E" OR Pi="M" THEN GOTO 785 CO)TO 7"
Page 25 and 26:
I first became aware of the bug in
Page 27 and 28:
A. Beasley After using the ZX80 for
Page 29 and 30:
I sr The first few weeks after the
Page 31 and 32: i! I are odd jmeone to write a a ta
Page 33 and 34: id (and IC AND )MPUTER" er and >ut
Page 35 and 36: 16K Games Power Boat if you're desp
Page 37 and 38: }RTIO 3RT W J Hfl'.f K E COl T CORj
Page 39 and 40: 1220 \225 230 250 ,L NEED m 270 WAY
Page 41 and 42: IKING >S TO THi 350 >TCARD Ol OF 84
Page 43 and 44: LAD ROM THE AT MRS TO FROM V" ) $5)
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Page 53 and 54: sves ile sre insect is ion*t n lsec
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Page 57 and 58: Winning Positions COIN COIN BELL BE
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Page 61 and 62: lTURES P&P) ITAL iGUE write to IGHT
Page 63 and 64: ms, arid I time you convince somebo
Page 65 and 66: ist for the feel good luct their 5
Page 67 and 68: *t»m Tarshis, Executive Vice Presi
Page 69 and 70: and 2.5 volts. This will produce a
Page 71 and 72: tng of KE, the the his mg ay. cts i
Page 73 and 74: Review Keyboard Review Crofton's Ad
Page 75 and 76: "The hi-res board seems to go to a
Page 77 and 78: Make the most of IK Chopper Squad R
Page 79 and 80: onic Systems 80/1 ^ / RAMPACK MASSI
Page 81: 51 IF A(2) «* 188 THEN LET A (Z)
Page 85 and 86: ZX81 HARDWARE 40 KEY KEYBOARD. Kit
Page 87 and 88: 4090 GOTO 9100 5000 GOSUB 9500 5010
Page 89 and 90: I 1K Games 10 LET 20 LET 30 LET 4-0
Page 91 and 92: Etchasketch This very short program
Page 93 and 94: meant the addition to its repertoir
Page 95 and 96: SYSTEM/MULTIFUNCTION COMMANDS BREAK
Page 97 and 98: 270 280 290 300 310 320 IF IF IF IF
Page 99 and 100: Make sure you get every issue of ZX
Page 101 and 102: ZX80 Programs ZX80 fights back Musi
Page 103 and 104: Catch Avoid being trapped by your s
Page 105 and 106: Software Orwin strikes again Casset
Page 107 and 108: ZX81 Software LARGE CHARACTERS REM
Page 109 and 110: Moving graphics Getting into the Mo
Page 111 and 112: Specialist Book§ i Choosing progra
Page 113 and 114: OZJIJL I* » JTA. _ A."--." * rt k
Page 115 and 116: the new address (in decimal) follow
Page 117 and 118: WHAT CAN I DO WITH 1K? If your answ
Page 119 and 120: Compiler A program whose function i
Page 121 and 122: ZX COMPUTING SUMMER 1982 Computer G
Page 123 and 124: S-100 Name of a bus or connection s
Page 125 and 126: After taking your move the computer
Page 127 and 128: WHAT'S ON NEXT? IN HOBBY ELECTRONIC
Page 129 and 130: are not lost when the ZX81 is turne
Page 131 and 132: ZX Users' Club JOIN YOUR USERS' GRO
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