User Manual
Page 86
USB 3.0 Controller Enable or disable all the USB 2.0 ports. Legacy USB Support Enable or disable Legacy OS Support for USB 3.0 devices. 81 English Select UEFI Setup Only to disable legacy USB support. Legacy USB 3.0 Support Enable or disable Legacy OS Support for USB 2.0 devices. If you encounter USB compatibility issues it is recommended to support USB devices under the UEFI setup and Windows/Linux operating systems only. 4.4.8 USB Configuration B85M Pro4 USB Controller Enable or disable all the USB 3.0 ports.
USB 3.0 Controller Enable or disable all the USB 2.0 ports. Legacy USB Support Enable or disable Legacy OS Support for USB 3.0 devices. 81 English Select UEFI Setup Only to disable legacy USB support. Legacy USB 3.0 Support Enable or disable Legacy OS Support for USB 2.0 devices. If you encounter USB compatibility issues it is recommended to support USB devices under the UEFI setup and Windows/Linux operating systems only. 4.4.8 USB Configuration B85M Pro4 USB Controller Enable or disable all the USB 3.0 ports.