ASROCK B75 Pro3 - Super IO Configuration

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3.4.7 Super IO Configuration
Serial Port
Use this item to enable or disable the onboard serial port.
Serial Port Address
Use this item to set the address for the onboard serial port. Conguration
options: [3F8h / IRQ4] and [3E8h / IRQ4].
Infrared Port
Use this item to enable or disable the onboard infrared port.