ASUS P8B-E/4L Manual Do Utilizador
4-20
Chapter 4: BIOS setup
4.5.9
USB Configuration
Aptio Setup Utility - Copyright (C) 2010 American Megatrends, Inc.
Advanced
Enables Legacy USB support.
AUTO option disables legacy
support if no USB devices are
connected. DISABLE option will
keep USB devices available
only for EFI applications.
USB Configuration
USB Devices
USB Devices
1 Mouse, 2 Hubs
Legacy USB Support
[Enabled]
EHCI Hand-off
[Disabled]
USB hardware delays and time-out:
USB transfer time-out
[20 sec]
Device reset time-out
[20 sec]
Device power-up delay
[Auto]
The USB Devices item shows the auto-detected values. If no USB device is
detected, the item shows None.
Legacy USB Support [Enabled]
Allows you to enable or disable support for legacy USB devices. Setting to [Auto]
allows the system to detect the presence of USB devices at startup. If detected, the
USB controller legacy mode is enabled. If no USB device is detected, the legacy
USB support is disabled. Configuration options: [Disabled] [Enabled] [Auto]
EHCI Hand-off [Disabled]
Enables or disables the BIOS EHCI hand-off support.
Configuration options: [Disabled] [Enabled]
4.5.8
Intel TXT(LT) Configuration
Aptio Setup Utility - Copyright (C) 2010 American Megatrends, Inc.
Advanced
Enables Legacy USB support.
AUTO option disables legacy
support if no USB devices are
connected. DISABLE option will
keep USB devices available
only for EFI applications.
Intel Trusted Execution Technology Configuration
Intel TXT support only can be enabled/disabled if SMX
is enabled. VT and VT-d support must also be enabled
prior to TXT.
Secure Mode Extensions (SMX)
Enabled
Intel TXT(LT) Support
[Disabled]
Intel TXT(LT) Support [Disabled]
Allows you to enable or disable the Intel Trusted Execution Technology (TXT)
feature. Configuration options: [Disabled] [Enabled]
The Intel TXT(LT) Support item requires a Trusted Platform Module (TPM) to
be installed on the motherboard to enable.