williams-et-al-1983-apple-ii-computer-graphics

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78 APPLE II COMPUTER GRAPHICSThe following program will POKE into memory the values we justgenerated. We will plot the cannon in the upper left corner of thescreen.10 REM POKE CANNON20 REM THE HARD WAY !30 REM40 HGR50 REM QUADRANT A60 POKE 8192,85 : POKE 9216,85:POKE 10240 ,85: POKE 11264,8570 POKE 12288, 0 : POKE 13312,32 :POKE 14336,48: POKE 15360 ,12080 REM QUADRANT B90 POKE 8193,42: POKE 9217,106:POKE 10241,106: POKE 11265,42100 POKE 12289,20 : POKE 13313,21:POKE 14337,53: POKE 15361,120110 REM QUADRANT C120 POKE 8320 ,120 : POKE 9344,48130 REM QUADRANT D140 POKE 8321,120 : POKE 9345,48150 ENDListing 8-3. Cannon poker.Listing 8-3 makes no pretense at cleverness, but it does perform aspromised .By now you have seen how the individual bits on the Hi-Res screen arecontrotled, and how you can wade through the memory map to fi nd thebyte of your dreams. Using those ideas, you have developed the data forand plotted some simple figures on the screen. Not bad fo r a day's work,eh?VocabularyColumn AddressDigitizingPosition AddressRow AddressExercises1. Place the given dot pattern where indicated on the Hi-Res screen.a. -XX -X -X in row 10, column 20 of boxes, and fi rst byte of the box.
CHAPTER 8-Hl-RES GRAPHICS 79b. XX-XX-- in the fifth line and eleventh column of dots.c. X-----X in the fourteenth line and 27th column of dots_2. Write a BASIC program which lets the user plot the cannon fromExample 3 in any group of four boxes on the Hi-Res screen.3. Digitize and display the butterfly figure given below.%cP--_...__Figure 8-9. A butterfly.
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APPLE IICOMPUTERGRAPHICSKen William
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Contents1 Introduction 12 Computer
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1IntroductionThe level of graphics
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4 APPLE II COMPUTER GRAPHICSmachine
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6 APPLE II COMPUTER GRAPHICScompute
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8 APPLE II COMPUTER GRAPHICSzeros i
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10 APPLE II COMPUTER GRAPHICSthe sy
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•
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14 APPLE II COMPUTER GRAPHICSdiffer
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16 APPLE II COMPUTER GRAPHICSDOS ve
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18 APPLE II COMPUTER GRAPHICSThe po
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4APP LESO FTExtensionsObjectivesAft
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CHAPTER 4-APPLESOFT EXTENSIONS 23va
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CHAPTER 4-APPLESOFT EXTENSIONS 251
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CHAPTER 4-APPLESOFT EXTENSIONS 2710
Page 35 and 36: Introducing -Diskette to Accompany
Page 37 and 38: CHAPTER 4-APPLESOFT EXTENSIONS 2917
Page 39 and 40: 5Graphics Modes andSoft SwitchesObj
Page 41 and 42: CHAPTER 5-CRAPHIC MODES AND SOFT SW
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Page 52 and 53: 44 APPLE II COMPUTER GRAPHICSEach b
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Page 56 and 57: 48 APPLE II COMPUTER GRAPHICS3 PLOT
Page 58 and 59: 50 APPLE II COMPUTER GRAPHICSType t
Page 60 and 61: 52 APPLE II COMPUTER GRAPHICSVocabu
Page 62 and 63: 54 APPLE II COMPUTER GRAPHICScolor.
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Page 68 and 69: 60 APPLE II COMPUTER GRAPHICS70 POK
Page 70 and 71: 62 APPLE II COMPUTER GRAPHICS37- 85
Page 73 and 74: 8Hi-Res GraphicsObjectivesAfter rea
Page 75 and 76: CHAPTER 8-Hl-RES GRAPHICS 67When J
Page 77 and 78: C..: HAPTER 8-Hl-RES GRAPHICS 69Goi
Page 79 and 80: CHAPTER 8-Hl-RES GRAPHICS 71Row Add
Page 81 and 82: CHAPTER 8-Hl-RES GRAPHICS 73The fou
Page 83 and 84: CHAPTER 8-Hl-RES GRAPHICS 75The row
Page 85: CHAPTER 8-Hl-RES GRAPHICS 77Solutio
Page 90 and 91: 82 APPLE II COMPUTER GRAPHICSA Bit
Page 92 and 93: 84 -APPLE II COMPUTER GRAPHICSget t
Page 94 and 95: 86 APPLE II COMPUTER GRAPHICSDOTBIT
Page 96 and 97: 88 APPLE II COMPUTER GRAPHICSIn Fig
Page 98 and 99: 90 APPLE II COMPUTER GRAPHICSblue a
Page 100 and 101: 92 APPLE II COMPUTER GRAPHICSHEX HE
Page 102 and 103: 94 APPLE II COMPUTER GRAPHICS50 HGR
Page 104 and 105: 96 APPLE II COMPUTER GRAPHICSone of
Page 107 and 108: 991 111ObjectivesAfter reading Chap
Page 109 and 110: CHAPTER 10-SHAPING UP 101A closed d
Page 111 and 112: CHAPTER 10-SHAPING UP 103In the fir
Page 113 and 114: CHAPTER 10-SHAPING UP 105( (J(J) ha
Page 115 and 116: CHAPTER 10-SHAPING UP 107as the com
Page 117 and 118: 6 POKE 232,: POKE 233 ,37 REM8 REM
Page 119 and 120: CHAPTER 10-SHAPING UP 111Sections A
Page 121 and 122: CHAPTE R 10-SHAPING UP 113DRAW 2 AT
Page 123 and 124: CHAPTER 10-SHAPING UP 115printed at
Page 125: CHAPTER 10-SHAPING UP 117Exercises1
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Page 130 and 131: 122 APPLE II COMPUTER GRAPHICSLet's
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Page 134 and 135: 126 APPLE II COMPUTER GRAPHICS670 X
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128 APPLE II COMPUTER GRAPHICS71¥l
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130 APPLE II COMPUTER GRAPHICS100 R
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132 APPLE II COMPUTER GRAPHICSAs we
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12Byte-Move ShapesObjectivesAfter r
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CHAPTER 12-BYTE-MOVE SHAPES 13729JJ
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CHAPTER 12-BYTE-MOVE SHAPES 139l!il
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CHAPTER 12-BYTE-MOVE SHAPES 141POKE
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CHAPTER 12-BYTE-MOVE SHAPES 1431BYT
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CHAPTER 12-BYTE-MOVE SHAPES 145Agai
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148 APPLE II COMPUTER GRAPHICSprovi
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150 APPLE II COMPUTER GRAPHICSaroun
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152 APPLE II COMPUTER GRAPHICS3 : 2
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154 APPLE II COMPUTER GRAPHICSdesir
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156 APPLE II COMPUTER GRAPHICSso ma
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158 APPLE II COM PUTER GRAPHICSfigu
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160 APPLE II COMPUTER GRAPHICSHPLOT
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162 APPLE II COMPUTER GRAPHICSset u
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164 APPLE II COMPUTER GRAPHICStoget
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166 APPLE II COMPUTER GRAPHICSThen
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168 APPLE II COMPUTER GRAPHICSyou s
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170 APPLE II COMPUTER GRAPHICS-$960
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172 APPLE II COMPUTER GRAPHICSand i
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174 APPLE II COMPUTER GRAPHICSsome
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176 APPLE II COMPUTER GRAPHICSTable
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ZS$==e
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GlossaryA particular number that co
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GLOSSARY 183HI-RES. High Resolution
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GLOSSARY 185SEPARATION. Any one of
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Editoi:(s)Hi-Res, 66, 100Low- Res,
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