3-60
400 Series
5.
I/O ports
This option controls settings for serial and parallel ports and the sound system.
(a)
Serial Port
This option allows you to set the COM level,
COM1
or
COM2
, for the
serial port and PCMCIA slot.
The serial port interrupt request level (IRQ)
and I/O port base address for each COM level is shown below:
COM level
Interrupt level
I/O address
COM1
4
3F8h
(Serial port default)
COM2
3
2F8h
COM3
4
3F8h
COM4
3
2F8h
Not used
(Disables port)
NOTE:
Do not assign the same interrupt request level and I/O address
to serial port and PCMCIA card.
(b)
Infrared Port
This option allows you to set the COM level for the infrared port.
The
infrared port interrupt request level (IRQ) and I/O port base address for each
COM level is shown below.
COM level
Interrupt level
I/O address
COM1
4
3F8h
COM2
3
2F8h
COM3
4
3F8h
COM4
3
2F8h
Not used
(Disables port)
(Infrared port default)
NOTE:
If the setting for the infrared port is the same as that for the
serial port, the serial port is automatically set to disabled.