Dell OptiPlex GX280 - Manual (Page 33)

LPT Port
Mode
for IBM AT
compatibility
PS/2 - the
port is
configured for
IBM PS/2
compatibility
EPP -
enhanced
parallel port
protocol
ECP -
extended
capability port
protocol
LPT Port
Address
This option sets the
address that the
built-in parallel port
uses. The settings
are 378h (default),
278h, and 3BCh.
PCI Slots
Enables or disables
the PCI slots.
Serial
Port #1
Auto, the default
setting,
automatically
configures a
connector to a
particular
designation (COM1
or COM3).
Serial
Port #2
Auto, the default
setting,
automatically
configures a
connector to a
particular
designation (COM1
or COM3). (This
setting appears only
if an optional serial
port adapter is
installed.)
USB
USB devices are
detected and
supported in the
operating system
when this option is
set to On.
USB
Disable
Enables or disables
the front USB
connectors. The
default setting is
On. To disable the
front connectors,
select Off.
Performance
Hyper -
threading
If your computer's
processor supports
hyper-threading,
this option appears
in the Options List.