53 AIMB-785 User Manual
Chapter 3 BIOS Operation
Controls the execution of UEFI and Legacy Video OpROM.
– Other PCI devices
Determines OpROM execution policy for devices other than Network, Stor-
age, or Video.
3.2.2.16 USB Configuration
Figure 3.31 USB Configuration
Legacy USB Support
This is for supporting USB device under legacy OS such as DOS. When choos-
ing "AUTO", the system will automatically detect if any USB device is plugged
into the computer and enable USB legacy mode when a USB device is plugged
and disable USB legacy mode when no USB device is plugged.
XHCI Hand-off
This is a workaround for OS without XHCI hand-off support. The XHCI owner-
ship change should be claimed by XHCI driver.
USB Mass Storage Driver Support
Enable or Disable USB Mass Storage driver support.
USB transfer time-out
Allows you to select the USB transfer time-out value. [1,5,10,20sec]
Device reset time-out
Allows you to select the USB device reset time-out value. [10,20,30,40sec]
Device power-up delay
Maximum time the device will take before it properly reports itself to the Host
Controller. "Auto" uses default value: for a Root port it is 100 ms, for a Hub port
the delay is take from Hub descriptor.
Generic Flash disk 8.07
Mass storage device emulation type. "Auto" enumerates device according to
their media format. Optical drives are emulated as 'CDROM', drives with no
media will be emulated according to a drive type.
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