Nintendo GAME BOY ADVANCE Programming Manual page 152

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Game Boy Advance Programming Manual May 25, 2005
If the Game Boy Advance cannot respond to this series of SIO interrupts (due to such factors as a large
DMA, an extended interrupt process, or a prolonged disabling of interrupts), then data communication will
fail and incorrect values will be exchanged.
Thus, you should design your application so that the progress of the game will not be affected due to the
exchange of incorrect values during communication. For example, do not disable interrupts for long peri-
ods of time, and either divide up large DMA tasks or use some other method such as substituting them with
CpuFastCopy().
AGB-06-0001-002-B13 © 1999-2005 NINTENDO
Released: May 27, 2005