ASUS Z9NR-D12 ユーザーズマニュアル

4-26

Chapter 4: BIOS setup

4.4.7

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 Mice, 3 Hubs

Legacy USB Support

[Enabled]

EHCI Hand-off

[Disabled]

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]

EHCI Hand-off [Disabled]

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

by EHCI driver.

Configuration options: [Disabled] [Enabled]

USB Hardware Delays and Time-outs
USB transfer time-out [20 sec]

This item sets the time-out value for control, bulk, and interrupt transfer.

Configuration options: [1 sec] [5 sec] [10 sec] [20 sec]

Device reset time-out [20 sec]

USB mass storage device Start Unit command time-out.

Configuration options: [10 sec] [20 sec] [30 sec] [40 sec]

Advanced