IBM MICRO TOWER 2169 - Manual (Page 54)

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Enable this item if you are using a keyboard connected through
the USB Port. Ensure the USB controller is enabled.
Init Display First Default: PCI Slot
Use this item to define if your graphics adapter is installed in
one of the PCI slots or select Onboard if you have a graphics
system integrated on the System Board.
Onboard PCI Audio Default: Enabled
Your PC has an integrated PCI audio system, use this item to
enable or disable it.
Hardware Reset Default: Enabled
If you enable this item, you can reset the system by pressing a
hardware reset button if you have connected this function to the
mainboard.
IDE HDD Block Mode Default: Enabled
Block mode transfers can improve the access to IDE devices.
Enable this item if your IDE devices support block mode
transfers.
Onboard FDC Controller Default: Enabled
Use this item to turn on or off the floppy disk controller that is
built into this System Board.
Onboard Serial Port 1 Default: 3F8/IRQ4
This item lets you disable the built-in serial port 1, or enable it
by assigning an I/O address and an Interrupt Request Line
(IRQ).
Onboard Serial Port 2 Default: Disable
On some models this item lets you disable the built-in serial port
2, or enable it by assigning an I/O address and an Interrupt
Request Line (IRQ).
UART Mode Select Default: Normal
UR2 Duplex Mode DefaultL Half
This item defines the operation of serial port 2. In the Normal
setting, serial port 2 is assigned to the external COM2
connector. If you have installed an optional infrared port, you
must change the setting of this item to one of the Infrared
settings (usually IrDA or FIR). These settings will disable the
external COM2 serial port connector and assign the resources
to the infrared device. If you have selected an IR mode, use the
following item UR2 Duplex Mode to define if the IR port is full
duplex or half duplex.
Onboard Parallel Port Default: 378/IRQ7