Asus ROG MAXIMUS Z790 HERO EVA-02 ROG MAXIMUS Z790 Series BIOS Manual English - Page 72
USB Configuration, Legacy USB Support, XHCI Hand-off, Mass Storage Devices
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6.11 USB Configuration The items in this menu allow you to change the USB-related features. The Mass Storage Devices item shows the auto-detected values. If no USB device is detected, the item shows None. Legacy USB Support [Enabled] Your system supports the USB devices in legacy operating systems. [Disabled] Your USB devices can be used for BIOS setup only and cannot be recognized in the boot devices list. [Auto] Your system automatically detects the presence of USB devices at startup. If any USB devices are detected, the legacy USB support is enabled. XHCI Hand-off This is a workaround for OSes without XHCI hand-off support. The XHCI ownership change should be claimed by XHCI driver. [Disabled] Support XHCI by XHCI drivers for operating systems with XHCI support. [Enabled] Support XHCI by BIOS for operating systems without XHCI support. Mass Storage Devices: Allows you to select the mass storage device emulation type for devices connected. [Auto] enumerates devices according to their media format. Optical drives are emulated as [CDROM], drives with no media will be emulated according to a drive type. Configuration options: [Auto] [Floppy] [Forced FDD] [Hard Disk] [CD-ROM] USB Single Port Control Allows you to enable or disable the individual USB ports. Refer to section Motherboard layout and Rear I/O connection in your motherboard's user manual for the location of the USB ports. 72 ROG Z790 Series BIOS Manual