Dell OptiPlex GXi, Справочное и монтажное руководство

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Using the System Setup Program 2-9
NOTE: When two COM ports share an IRQ setting, you
can use either port as necessary, but you may not be able
to use them both at the same time.
For more information about built-in ports, port designa-
tions, IRQs, and the remapping 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), to
alternate addresses
278H
or
3BCH
,
or to
OFF
to disable the
port.
NOTE: Do not set
PARALLEL PORT
to
278H
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.
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 when necessary to accom-
modate 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 when necessary to
accommodate a controller card installed in an expansion slot.
With
WRITE-PROTECT
selected, nothing can be written to dis-
kette 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 con-
troller as necessary).
Selecting
OFF
turns off the built-in diskette/tape drive control-
ler; this option is used primarily for troubleshooting purposes.
USB
USB
determines whether the Universal Serial Bus (USB)
connectors on the system board are turned
ON
or
OFF
(the
default). You must reboot your system before a change
takes effect.
Speaker
SPEAKER
determines whether the onboard speaker is
ON
(the default) or
OFF
. A change to this category takes
effect immediately (rebooting the system is not required).
ECC
ECC
determines whether the system’s error correction
code (ECC) capability is turned
ON
(the default) or
OFF
.
Your system supports ECC only if all the installed
DIMMs are ECC DIMMs. If any of the installed DIMMs
are not ECC DIMMs, this category does not appear.
System Data Categories
The following categories, which are not selectable, dis-
play information about the system:
•
MICROPROCESSOR
displays the type of micro-
processor installed in the computer.
•
EXTERNAL CACHE
displays the size of the onboard
cache (
256 or 512 KB
).
•
VIDEO MEMORY
displays the amount of video mem-
ory detected in your system.