Biostar A320MD PRO Bios User Manual - Usb Configuration

30 | 2. Advanced Menu

USB Configuration

Legacy USB Support

The item allows you to enable 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.

Options: Enabled (Default) / Disabled / Auto

Legacy USB3.0 Support

The item enables or disables legacy USB3.0 support.

Options: Enabled (Default) / Disabled

XHCI Hand-off

This is a workaround for OSes without XHCI hand-off support. The XHCI ownership change should 

be claimed by XHCI driver.

Options: Enabled (Default) / Disabled

USB FLASH DRIVE PMAP

This item Mass storage device emulation type. ‘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.

Options: Auto (Default) / Floppy / Forced FDD / Hard Disk / CD-ROM