Commodore 64 Programmer's Reference Manual page 6

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Programming Sprites-Another Look 153
Making Sprites in BASIC-A Short Program. ... . .. . . .. 153
Crunching Your Sprite Programs 156
Positioning Sprites on the Screen 157
Sprite Priorities
.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
161
Drawing a Sprite 162
Creati ng a Sprite
. . .
Step by Step 163
Moving Your Sprite on the Screen. . .. . . .. . . .. . ... . . .. 165
VerticalScrolling.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
166
The Dancing Mouse-A Sprite Program Example. . . . . .. 166
EasySpritemakingChart.. . ... . ... . . .. . ... . . ...
176
SpritemakingNotes. . . .. . . .. . ... . . .. . . .. . . .. . ... . ..
177
4.
PROGRAMMING SOUND AND MUSIC
ON YOUR COMMODORE 64 183
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Introduction 184
Volume Control 186
Frequencies of Sound Waves. .
. . . . . . . . . . . . . . . . . . . . ..
186
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UsingMultiple Voices... . .. . . ... . . .. . . ... . .. .
187
Controlling Multiple Voices 191
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Changing Waveforms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
192
Understanding W aveforms.. . .. . ... . . . .. . ...
194
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The EnvelopeGenerator. . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
196
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Filtering 199
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Advanced Techniques. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
202
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Synchronization and Ring Modulation 207
5. BASICTOMACHINE LANGUAGE
209
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What is Machine Language?
. .. . .. . . ... . . .. . . ... ... . ..
210
What Does Machine Code Look Like?
. . . . . . . . . . . . . . . ..
211
Simple Memory Map of the Commodore 64
. . . . . . . . . . ..
212
The Registers Inside the 6510 Microprocessor 213
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How Do You Write Machine Language Programs? 214
64MON 215
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Hexadecimal Notation. . ... . .. . . .. . . . . . . . .. . ... ..
215
Your First Machine Language Instruction 218
Writing Your First Program 220
. Addressing Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
221
Zero Page 221
The Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 222
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