Press <Enter> and you will enter the sub-menu of the items.DMA Resources 0/1/3/5/ 6/7 for setting determine if BIOS should remove a DMA from the available DMAs passed to devices that are configurable by the system BIOS. The available DMA pool is determined by reading the NVRAM. If more DMAs must be removed from the pool, the end user can reserve the DMA.
DMA Resources Setup