ASRock Z370 Extreme4 User Manual - Page 85

USB Configuration, Legacy USB Support, PS/2 Simulator, XHCI Hand-off

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4.6.7 USB Configuration Z370 Extreme4 Legacy USB Support Enable or disable Legacy OS Support for USB 2.0 devices. If you encounter USB compatibility issues it is recommended to disable legacy USB support. Select UEFI Setup Only to support USB devices under the UEFI setup and Windows/Linux operating systems only. PS/2 Simulator Enable the support of I/O port 60h/64h emulation. This should be enabled for the complete USB keyboard legacy support for non-USB aware OSes. XHCI Hand-off This is a workaround for OSes without XHCI hand-off support. The XHCI ownership change should be claimed by XHCI driver. Third Party USB 3.1 Controller Enable or disable all of the USB 3.1 Gen2 ports controlled by Third Party chips. 79 English

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English
79
Z370 Extreme4
4.6.7
USB Configuration
Legacy USB Support
Enable or disable Legacy OS Support for USB 2.0 devices. If you encounter USB
compatibility issues it is recommended to disable legacy USB support. Select UEFI
Setup Only to support USB devices under the UEFI setup and Windows/Linux
operating systems only.
PS/2 Simulator
Enable the support of I/O port 60h/64h emulation. °is should be enabled for the
complete USB keyboard legacy support for non-USB aware OSes.
XHCI Hand-off
°is is a workaround for OSes without XHCI hand-off support. °e XHCI
ownership change should be claimed by XHCI driver.
Third Party USB 3.1 Controller
Enable or disable all of the USB 3.1 Gen2 ports controlled by °ird Party chips.