Asus CUV4X-DLS User’s User Manual page 70

4. BIOS SETUP
PCI DMA Resource Exclusion
DMA x Used By ISA [No/ICU]
These fields indicate whether or not the displayed DMA channel for each
field is being used by a legacy (non-PnP) ISA card. The setting [No/ICU]
for a DMA channel indicates that you are using the ISA Configuration Utility
(ICU), and that this particular DMA channel is NOT required by a legacy
ISA card. Set the DMA field to [Yes] if you install a legacy ISA card that
requires a DMA channel and you are NOT using ICU. Configuration options:
[No/ICU] [Yes]
PCI UMB Resource Exclusion
70 ASUS CUV4X-DLS User's Manual