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ET870 Series
User’s Manual
4.4.11 USB Configuration
BIOS Setting
Description
Legacy USB Support
•
Enabled
enables Legacy USB support.
•
Auto
disables legacy support if there is no
USB device connected.
•
Disabled
keeps USB devices available only
for EFI applications.
XHCI Hand-off
This is a workaround for OSes without XHCI
hand-off support. The XHCI ownership change
should be claimed by XHCI driver.
USB Mass Storage
Driver Support
Enables / Disables the support for USB mass
storage driver.
USB Transfer
time-out
The time-out value (1 / 5 10 / 20 secs) for Control,
Bulk, and Interrupt transfers.
Device reset time-out
Gives seconds (10 / 20 / 30 / 40 secs) to delay
execution of Start Unit command to USB mass
storage device.
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 taken from hub
descriptor.
Jet Flash Transcend
32GB 1100
Mass storage device emulation type.
“Auto” enumerates devices according to their
media format. Optical drives are emulated as
“CDROM”, drivers with no media will be emulated
according to a drive type.
Options: Auto / Floppy / Forced FDD / Hard Disk /
CD-ROM
Summary of Contents for ET870 Series
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