## Using Sound Code in System ROM

In the Game Boy Advance System ROM, a sound program is included and is responsible for things like startup sound. By using a portion of the sound program with this system, the programs in Game Pak ROM and Internal RAM can be minimized.
However, the following restrictions and differences exist:
-Slower speed than Internal RAM execution version (sys_rom = 0)
-Cannot limit the processing time of m4aSoundMain( )
-Must use 2 channels for DMA
-Operates only with Development AGB (TS4) and later.
If you want to use the sound code in the System ROM, tell the sound engineer to "Add sys_rom = 1 to the definition file mks4agb.ini."

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