Advanced Setup
NTMS6900 / ATXW-5520 Technical Reference
Chassis Plans
5-20
USB 2.0 Controller Mode
This option configures the USB 2.0 controller to high-speed (480Mbps) or full-speed (12Mbps)
mode. If the
Legacy USB Support
option is set to
Disabled
, this option is not available.
The Setup screen displays the system option:
USB 2.0 Controller Mode [FullSpeed]
Available options are:
FullSpeed
HiSpeed
BIOS EHCI Hand-Off
This option is a work-around for operating systems without EHCI hand-off support. If the
Legacy
USB Support
option is set to
Disabled
, this option is not available.
The Setup screen displays the system option:
BIOS EHCI Hand-Off [Enabled]
Available options are:
Disabled
Enabled
Legacy USB1.1 HC Support
This option allows you to alert the motherboard‟s USB hardware controller that there may be older
USB 1.1 devices used in the system. Some of these legacy devices may have issues functioning
on a faster USB 2.0 interface.
The Setup screen displays the system option:
Legacy USB1.1 HC Support [Enabled]
Available options are:
Disabled
Enabled
Hotplug USB FDD Support
Some older USB floppy disk drives may create issues when they are installed or removed from a
system under power. When this option is set to
Auto
the BIOS creates a dummy FDD device that
will be associated with any hotplug USB floppy drive that may be used later by the system. The
Auto option will only perform this dummy device creation when there is no USB FDD present.
The Setup screen displays the system option:
Hotplug USB FDD Support [Auto]
Available options are:
Disabled
Enabled
Auto
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