Toshiba PORTEGE M300 Maintenance Manual page 222

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
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
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