Toshiba PORTEGE M300 Maintenance Manual page 218

3.32 SETUP
10. I/O ports
This option controls settings for the serial and parallel ports.
NOTE: This item can be set only when the Advanced Port Replicator III is connected.
(a) Serial
Use this option to set the COM level for the serial port. The serial port
interrupt request level (IRQ) and I/O port base address for each COM level is
shown below:
COM level
COM1
COM2
COM3
COM3
COM3
COM4
COM4
COM4
Not Used
(b) Parallel
This option sets the interrupt request level and I/O port base address for the
parallel port. When the parallel port mode is set to Std. Bi-direct, the options
are as follows:
LPT setting
LPT 1
LPT 2
LPT 3
Not Used
When the parallel port mode (see settings below) is set to ECP, the DMA
channel can also be set to 1 or 3. The default is 3.
LPT setting
LPT 1
LPT 2
LPT 3
Not Used
3-106
Interrupt level I/O address
4
3
4
5
7
3
5
7
Disables port
Interrupt level
7
5
7
Interrupt level I/O address
7
5
7
Disables port
PORTEGE M300 Maintenance Manual (960-504)
3 Tests and Diagnostics
3F8H (Default)
2F8H
3E8H
3E8H
3E8H
2E8H
2E8H
2E8H
I/O address
378H
278H
3BCH
Disables port
DMA channel
378H 3 (Default)
278H 3
3BCH 3