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To disable an unused system port:
1.
Restart the system and start the BIOS Setup program.
2.
On the Advanced/Peripheral Configuration screen, select the port you want to disable.
3.
Change the value of the setting to
Disabled
.
4.
Save the changes and exit from the BIOS Setup program.
The following expansion cards require specific system resource settings, as noted:
Expansion card
Resources required
BIOS parameter settings
First modem (Windows NT)
COM3, IRQ 4
Disable serial port 1 (COM1)
Second modem (Windows NT)
COM2, IRQ 3
Disable serial port 2 (COM2)
First parallel printer adapter
Base address 278
None
Second parallel printer adapter
Base address 3BC
None
On a system running Windows 95 or Windows 98, ensure the following system resources are
set as noted:
System resource
BIOS Setup parameter settings
Plug and Play operating system
Serial port 1, serial port 2, and parallel port enabled; Plug
and Play OS enabled
Serial port 1 (COM1)
Reserve IRQ 4 (if port is to be used)
Serial port 2 (COM2)
Reserve IRQ 3 (if port is to be used)
Parallel port (LPT1)
Reserve IRQ 7 (if port is to be used)
