MSI 946GZ Neo Series User Manual page 61

BIOS Setup
DM A Resource Setup
Press <Enter> to enter the sub-menu and the following screen appears.
DMA Channel 0/1/3/5/6/7
The settings determine if AMIBIOS should remove a DMA (Direct Memory Access)
from the available DMAs passed to devices that are configurable by the system
BIOS. The available DMA pool is determined by reading the ESCD NVRAM. If more
DMAs must be removed from the pool, the end user can reserve the DMA.
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