Mouse; Serial Port; Parallel Port; Parallel Mode - Dell OptiPlex GXi Reference And Installation Manual

Mouse

Mouse enables or disables the system's built-in PS/2-
compatible mouse port. Disabling the mouse allows an
expansion card to use interrupt request (IRQ) 12.

Serial Port

Serial Port configures the system's built-in serial port.
This category can be set to Auto (the default option) to
automatically configure the port, to a specific port setting
(COM1 through COM4), or to Off to disable the port.
If you set the serial port to Auto and add an expansion
card containing a port configured to a specific desig-
nation, the system automatically maps the built-in port to
the lowest available COM setting. For example, if the
expansion-card port is configured to COM1, the system
sets the built-in port to COM2; if the expansion-card port
is set to COM2, COM3, or COM4, the built-in port is set
to COM1.
For more information about the built-in port, port
designations, and the mapping of ports, see "Connecting
External Devices" in your online System User's Guide.

Parallel Port

Parallel Port configures the system's built-in parallel
port. This category can be set to 378h (the default
option), to alternate addresses 278h or 3BCh, or to Off to
disable the port.
NOTE: Do not set Parallel Port to 3BCh if you have an
Extended Capabilities Port (ECP) device connected to
the port.

Parallel Mode

Parallel Mode controls whether the system's built-in
parallel port acts as an AT-compatible (unidirectional) or
PS/2-compatible (bidirectional) port.
Your system also supports ECP mode, which can be used
by the Windows 95 operating system. Windows 95 uses
ECP protocol automatically if it detects an ECP-capable
device, removing the necessity for an ECP option in this
category.
Set this category according to the type of peripheral
device connected to the parallel port. To determine the
correct mode to use, see the documentation that came
with the device.

Hard Disk

Hard Disk enables or disables the system's built-in EIDE
hard-disk drive interface.
With Auto (the default option) selected, the system turns
off the built-in EIDE interface as necessary to accommo-
date a controller card installed in an expansion slot.
As part of the boot routine, the system first checks for a
primary hard-disk drive controller card installed in an
expansion slot. If no card is found, the built-in EIDE
interface is enabled, using IRQ14 and IRQ15.
If a primary controller is detected on the expansion bus,
the built-in EIDE interface is disabled.
Selecting Off disables the built-in EIDE interface.

Diskette

Diskette controls the operation of the system's built-in
diskette/tape drive controller.
With Auto (the default option) selected, the system turns
off the built-in diskette/tape drive controller as necessary
to accommodate a controller card installed in an expan-
sion slot.
With Write-Protect selected, nothing can be written to
diskette drives and tape drives using the system's built-in
diskette/tape drive controller. (The system can still read
from the drives.) When this option is selected, the Auto
option is also in effect (the system turns off the built-in
diskette/tape drive controller as necessary).
Selecting Off turns off the built-in diskette/tape drive
controller; this option is used primarily for troubleshoot-
ing purposes.

USB

USB determines whether the Universal Serial Bus (USB)
connectors on the system board are turned On or Off (the
default option).

Speaker

Speaker determines whether the built-in speaker is On
(the default option) or Off.
Using the System Setup Program 2-9