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Chapter 2: BIOS information
2.4.5 USB Configuration
USB Function [8 USB Ports]
This field disables all USB ports or sets the number number of USB ports to
enable. Configuration options: [Disabled] [2 USB Ports] [4 USB Ports] [6 USB
Ports] [8 USB Ports]
Legacy USB Support [Enabled]
This field enables or disables the support for legacy USB. The [Auto] option
disables the USB legacy support if no USB devices are connected. Configuration
options: [Disabled] [Enabled] [Auto]
IRQ3, IRQ4, IRQ5, IRQ7, IRQ9, IRQ10, IRQ11, IRQ14, IRQ15
[Available]
This field specifies if the IRQ is reserved or available for use by Legacy ISA
devices. Configuration options: [Available] [Reserved]
DMA Channel 0, 1, 3, 5, 6, 7 [Available]
This field specifies if the DMA Channel is reserved or available for use by Legacy
ISA devices. Configuration options: [Available] [Reserved]
Reserved Memory Size [Disabled]
This field specifies the reserved memory block for use of legacy ISA devices.
Configuration options: [Disabled] [16k] [32k] [64k]