Dell OptiPlex GX50 User Manual page 56

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Ad v a n c ed Fe a tu r es
– USB Controller enables or disables the onboard USB controller.
The onboard USB controller is always enabled during the BIOS
boot process. When set to On, the onboard USB controller
remains enabled when control is passed to the operating system.
When set to Off, the USB controller is disabled when control is
passed to the operating system.
– PCI Slots enable or disable the onboard PCI slots. PCI devices
plugged into the onboard PCI slots will not function or be
detected by the operating system when this field is set to disabled.
– Network Interface Controller determines whether the integrated
network adapter is On, Off, or On w/ MBA. The default is On. If
you select On w/ MBA, you are prompted to press
<Ctrl><Alt><b> at the Dell logo screen during computer
boot. A menu then appears that allows you to select PXE, RPL,
BootP, or NetWare as the active boot mode.
– Mouse Port enables or disables the computer's integrated Personal
System/2 (PS/2)-compatible mouse port. Disabling the mouse
allows an expansion card to use interrupt request (IRQ)12.This
setting is used to control the use of this legacy device.
– Serial Port 1 and Serial Port 2 configure the computer's integrated
serial ports. You can set these options to Auto (the default) to
automatically configure a port, to a particular designation (COM1
or COM3 for Serial Port 1; COM2 or COM4 for Serial Port 2), or
to Off to control the use of this legacy device or to disable the
port.
If you set a serial port to Auto and add an expansion card
containing a port configured to the same designation, the
computer automatically remaps the integrated port to the next
available port designation that shares the same IRQ setting as
follows:
COM1 (input/output [I/O] address 3F8h), which shares IRQ4
with COM3, is remapped to COM3 (I/O address 3E8h).
COM2 (I/O address 2F8h), which shares IRQ3 with COM4, is
remapped to COM4 (I/O address 2E8h).