Asus A7V User Manual page 69

4. BIOS SETUP
PCI/PNP DMA Resource Exclusion
DMA x Reserved for Legacy Device [No/ICU]
These fields indicate whether or not the displayed DMA channel for each
field is being used by an onboard legacy (non-PnP) device. The default
setting indicates either that the displayed DMA channel is not used or an
ICU is being used to determine if a legacy device is using that channel.
Configuration options: [No/ICU] [Yes]
ASUS A7V User's Manual 69