Dell POWEREDGE 4300 - Diskette; Mouse; Parallel Mode; Parallel Port

Using the System Setup Program 4-9
0RXVH
Mouse
enables or disables the system’s built-in PS/2-compatible mouse port. Dis-
abling the mouse allows an expansion card to use interrupt request (IRQ) 12.
6HULDO3RUWDQG6HULDO3RUW
Serial Port 1 and Serial Port 2 configure the system’s built-in serial ports. These
options can be set to Auto (the default) to automatically configure a port, to a particu-
lar designation (COM1 or COM3 for Serial Port 1; COM2 or COM4 for Serial Port 2),
or to Off
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 system automatically remaps the built-in 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).
 Likewise, COM2 (I/O address 2F8h), which shares IRQ3 with COM4, is
remapped to COM4 (I/O address 2E8h).
NOTE: When two COM ports share an IRQ setting, you can use either port as neces-
sary,
but you may not be able to use them both at the same time
. If the second
port (COM3 or COM4) is also in use, the built-in port is turned off.
3DUDOOHO3RUW  
Parallel Port configures the system’s built-in parallel port. Parallel Port 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.
3 DUDOOHO0RGH
Parallel Mode controls whether the system’s built-in parallel port acts as an
AT-compatible (unidirectional) or PS/2-compatible (bidirectional) port.
Set Parallel Mode 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.
'LVNHWWH
Diskette
controls the operation of the system’s built-in diskette drive controller.
With Auto (the default) selected, the system turns off the built-in diskette drive con-
troller when necessary to accommodate a controller card installed in an expansion
slot.
With Write Protect selected, nothing can be written to diskette drives using the
system’s built-in diskette drive controller. (The system can still read from the drives.)
33255bk0.book Page 9 Tuesday, August 25, 1998 8:46 AM