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2 usb configuration, Legacy usb support [auto, Port 64/60 emulation [disabled – Asus P5B-VM DO User Manual

Page 74: Usb 2.0 controller mode [hispeed, Bios ehci hand-off [enabled

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Chapter 2: BIOS setup

Legacy USB Support [Auto]

Allows you to enable or disable support for USB devices on legacy operating

systems (OS). 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]

Port 64/60 Emulation [Disabled]

Allows you to disable or enable the 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: [Disabled] [Enabled]

USB 2.0 Controller Mode [HiSpeed]

Allows you to configure the USB 2.0 controller in HiSpeed (480 Mbps) or Full

Speed (12 Mbps). Configuration options: [FullSpeed] [HiSpeed]

BIOS EHCI Hand-Off [Enabled]

Allows you to enable support for operating systems without an EHCI hand-off

feature. Configuration options: [Disabled] [Enabled]

The Module Version and USB Devices Enabled items show the

auto-detected values. If no USB device is detected, the item shows None.

2.4.2

USB Configuration

The items in this menu allow you to change the USB-related features. Select an

item then press to display the configuration options.

USB Configuration

Module Version - 2.24.0-11.4

USB Devices Enabled:

None

Legacy USB Support

[Auto]

Port 64/60 Emulation

[Disabled]

USB 2.0 Controller Mode

[HiSpeed]

BIOS EHCI Hand-Off

[Enabled]

Enables support for

legacy USB. AUTO

option disables

legacy support if

no USB devices are

connected.