MSI MS-9803 User Manual page 54

MS-9803 Mainboard
USB Configuration
Legacy USB Support
Set to [Enabled] if you need to use any USB 1.1/2.0 device in the operating
system that does not support or have any USB 1.1/2.0 driver installed, such as
DOS and SCO Unix.
USB 2.0 Controller Mode
This setting specifies the operation mode of the onboard USB 2.0 controller.
Hotplug USB FDD Support
Set to [Enabled] if your need to use a hotplug USB-interfaced FDD in the operat-
ing system that does not support or have any USB driver installed, such as DOS
and SCO Unix.
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