Commodore 64 Manual de usuario descargar pdf (Pagina 6)

. 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

Creating a Sprite . . . Step by Step 163

Moving YourSprite 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

. Introduction 184

Volume Control 186

Frequencies of Sound Waves. . . . . . .. . . . . . .. . . . . . . . .. 186

. UsingMultipleVoices... . .. . . ... . . .. . . ... . .. . 187

Controlling Multiple Voices 191

. Changing Waveforms . . .. . . . . . .. . . .. . . . .. . . . .. . . . . . .. 192

UnderstandingWaveforms..... .... . . . .. . ... 194

. The EnvelopeGenerator. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 196

. Filtering 199

. Advanced Techniques. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 202

. Synchronization and Ring Modulation 207

5. BASICTOMACHINELANGUAGE 209

. 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

. How Do You Write Machine Language Programs? 214

64MON 215

. HexadecimalNotation.. ... ... .. .. . .. .. .. .. .... .. 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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Commodore 64 Manual de usuario Pagina 6