Nintendo GAME BOY Programming Manual page 77

CHAPTER 3: SOUND FUNCTIONS...........................................79
Revision History...................................................................... 76
1. OVERVIEW OF SOUND FUNCTIONS...............................................79
2. SOUND CONTROL REGISTERS ........................................................81
2.1 Sound 1 Mode Registers ................................................................................81
2.2 Sound 2 Mode Registers ................................................................................84
2.3 Sound 3 Mode Registers ................................................................................85
2.4 Sound 4 Mode Registers ................................................................................87
2.5 Sound Control Registers ................................................................................90
3. VIN TERMINAL USAGE NOTES .........................................................91
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Chapter 3: Sound Functions