Asus MAXIMUS VIII HERO User Guide - Page 108

USB Configuration, Legacy USB Support [Enabled], XHCI Hand-off [Disabled]

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3.6.7 USB Configuration The items in this menu allow you to change the USB-related features. Chapter 3 The USB Devices item shows the auto-detected values. If no USB device is detected, the item shows None. Legacy USB Support [Enabled] [Disabled] The USB devices can be used only for the BIOS setup program. It cannot be recognized in boot devices list. [Enabled] Enables the support for USB devices on legacy operating systems (OS). [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. XHCI Hand-off [Disabled] This item is set to [Disabled] by default for the EHCI (enhanced host controller interface) support by XHCI drivers in operating systems. [Disabled] [Enabled] Support XHCI by XHCI drivers for operating systems with XHCI support. Support XHCI by BIOS for operating systems without XHCI support. USB Single Port Control This item allows you to enable or disable the individual USB ports. Refer to section 1.2.2 Motherboard layout for the location of the USB ports. 3-32 Chapter 3: BIOS Setup

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3-32
Chapter 3: BIOS Setup
Chapter 3
3.6.7
USB Configuration
The items in this menu allow you to change the USB-related features.
The
USB Devices
item shows the auto-detected values. If no USB device is detected, the
item shows
None
.
Legacy USB Support [Enabled]
[Disabled]
The USB devices can be used only for the BIOS setup program. It cannot
be recognized in boot devices list.
[Enabled]
Enables the support for USB devices on legacy operating systems (OS).
[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.
XHCI Hand-off [Disabled]
This item is set to [Disabled] by default for the EHCI (enhanced host controller interface)
support by XHCI drivers in operating systems.
[Disabled]
Support XHCI by XHCI drivers for operating systems with XHCI support.
[Enabled]
Support XHCI by BIOS for operating systems without XHCI support.
USB Single Port Control
This item allows you to enable or disable the individual USB ports.
Refer to section
1.2.2 Motherboard layout
for the location of the USB ports.