![](/images/new-backgrounds/1269462/269462135x1.webp)
I/O Device Configuration
Access the submenu to make changes to the following settings:
KBC Clock input
This setting allows you to set the clock frequency for the Keyboard Clock. The options are 6MHz, 8MHz, and 12 MHz.
Onboard COM1
This setting allows you to assign control of Onboard COM1. The options are Enabled (user defined), Disabled, Auto (BIOS controlled) and OS Controlled.
Base I/O Address
This feature allows the user to select the base I/O address for Onboard COM1. The options are 3F8, 2F8, 3E8 and 2E8.
Interrupt
This feature allows the user to select the IRQ (interrupt request) for Onboard COM1. The options are IRQ3 and IRQ4.
Onboard COM2
This setting allows you to assign control of Onboard COM2. The options are Enabled (user defined), Disabled, Auto (BIOS controlled) and OS Controlled.
Mode
This feature allows the user to specify the type of device that will be connected to Onboard COM2. The options are Normal, IR (for an infrared device) and
Base I/O Address
This feature allows the user to select the base I/O address for Onboard COM2. The options are 3F8, 2F8, 3E8 and 2E8.