ASUS Z9PA-U8 Manuel D’Utilisation

4-24

Chapter 4: BIOS setup

4.4.6

USB Configuration

Enabled 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:

1 Keyboard, 2 Hubs

Legacy USB Support

[Enabled]

USB3.0 Support

[Enabled]

XHCI Hand-off

[Disabled]

EHCI Hand-off

[Disabled]

Port 60/64 Emulation

[Enabled]

USB hardware delays and time-outs:

USB transfer time-out

[20 sec]

Device reset time-out

[20 sec]

USB Ports Configuration

→←:

Select Screen

↑↓:

Select Item

Enter: Select Item

+/-: Change Opt.

F1: General Help

F2: Previous Values

F5: Optimized Defaults

F10: Save & Exit

ESC: Exit

Legacy USB Support [Enabled]

This item enables or disables Legacy USB device support.
Configuration options: [Enabled] [Disabled] [Auto]

USB3.0 Support [Enabled]

This item enables or disables USB3.0 (XHCI) controller support.
Configuration options: [Enabled] [Disabled]

XHCI Hand-off [Enabled]

This is a workaround for OSes without XHCI ownership change should be claimed

by XHCI driver.

Configuration options: [Disabled] [Enabled]

EHCI Hand-off [Disabled]

This is a workaround for OSes without EHCI ownership change should be claimed

by EHCI driver.

Configuration options: [Disabled] [Enabled]

Port 60/64 Emulation [Enabled]

This item enables I/O port 60h/64h emulation support. This should be enabled for

the complete USB keyboard legacy support for non-USB aware OSes.
Configuration options: [Enabled] [Disabled]

Advanced