Chapter 4: AMI BIOS
4-11
Data Scrambling
This feature enables Data Scrambling. The options are Enabled and Disabled.
Device Tagging
This feature enables Device Tagging. The options are Enabled and Disabled.
Thermal Throttling
This feature selects from the different throttling methods. The options are Dis-
abled and CLTT (Closed Loop Thermal Throttling).
South Bridge Conguration
This item displays the current South Bridge Revision.
All USB Devices
This feature enables all USB ports/devices. The options are Enabled and Dis-
abled. When set to enabled, EHCI Controller 1 and 2 (below) become available.
EHCI Controller 1 / EHCI Controller 2
This feature enables the Enhanced Host Controller Interface (EHCI). The options
are Enabled and Disabled.
Legacy USB Support
This feature enables support for legacy USB devices. Select Auto to disable
legacy support if USB devices are not present. Select Disable to have USB
devices available only for EFI applications. The options are Enabled, Disabled
and Auto.
Port 60/64 Emulation
This feature enables I/O port 60h/64h emulation support. This should be enabled
for the legacy USB keyboard so that it can be fully supported by operating
systems that do not recognize a USB device. The options are Enabled, and
Disabled.
EHCI Hand-Off
This item is for Operating Systems that does not support Enhanced Host Con-
troller Interface (EHCI) hand-off. When enabled, EHCI ownership change will be
claimed by the EHCI driver. The settings are Enabled and Disabled.
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