Nintendo 1504166 - Game Boy Advance SP Edition Console Programming Manual page 112

AGB Programming Manual
DMA0CNT_H [d08] Source Address Control Flag
Control of the source address is specified after each DMA transfer.
A setting of 00 causes an increment.
A setting of 01 causes a decrement.
A setting of 10 causes it to be fixed.
11 is a prohibited code.
DMA0CNT_H [d07] Destination Address Control Flag
Control of the destination address is specified after each DMA transfer.
A setting of 00 causes an increment.
A setting of 01 causes a decrement.
A setting of 10 causes it to be fixed.
A setting of 11 causes an increment and after all transfers end, a
reload(The setting is returned to what it was when the transfer started) is
done.
©1999 - 2001 Nintendo of America Inc.
112
DMA Transfer
D.C.N. AGB-06-0001-002B4