Asus RS300-E8-PS4 User Guide - Page 90
USB Configuration
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5.4.6 USB Configuration This allows you to make changes on the configuration settings of the USB. Aptio Setup Utility - Copyright (C) 2013 American Megatrends, Inc. Advanced USB Configuration USB Devices 1 mouse,2 Hubs Legacy USB Support USB3.0 Support XHCI Hand-off EHCI Hand-off USB Mass Storage Driver Support Port 60/64 Emulation [Enabled] [Enabled] [Enabled] [Disabled] [Enabled] [Enabled] USB hardware delays and time-outs: USB transfer time-out [20 sec] Device reset time-out [20 sec] Device power-up delay [Auto] 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. 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 the 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] USB3.0 Support [Enabled] Enables or disables the USB3.0 (XHCI) controller support. Configuration options: [Disabled] [Enabled] XHCI Hand-off [Enabled] This functions as a workaround for OSes without XHCI hand-off support. Configuration options: [Disabled] [Enabled] EHCI Hand-off [Enabled] This functions as a workaround for OSes without EHCI hand-off support. Configuration options: [Disabled] [Enabled] USB Mass Storage Driver Support [Enabled] This allows you to enable or disable the USB Mass Storage driver support. Configuration options: [Disabled] [Enabled] Port 60/64 Emulation [Enabled] This allows you to 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] 5-20 Chapter 5: BIOS setup