System Program - Nintendo GAME BOY Programming Manual

Game Boy Programming Manual
Sound Functions
The rich variety of sound effects included in the system program can be generated by the Super
NES audio processing unit (APU).
The sound generator included in the system program can be used by transferring music data.
Controller Functions
Data from multiple Super NES controllers data can be read, providing for multiplayer games that
can accommodate between 2 to 4 players.
Miscellaneous
Super NES program data can be transferred.

1.4 System Program

The system program can provide the following features.
On the T.V. screen, the system program displays the space outside the game screen (picture frame).
The picture frame has the following features.
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The frame can be selected from among 9 pre-loaded frames.
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A mode in which an image created by the game producer is transferred and displayed as the
frame.
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A drawing mode that allows the user to create the frame.
Features of the color palette selection screen are as follows.
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Palettes can be selected from among 32 pre-loaded palettes.
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A mode that allows colors to be set from DMG in DMG games.
A mode is available that allows the user to arrange the colors on a palette.
A screen is provided for changing the key configuration of the controller.
If the commands described in Section 3.2 in this chapter, System Command Details, are sent to the
register file, Super NES functions, such as those described in Section 1.3, Functions, can be used
by having the system program read these commands.
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