3.32 SETUP 3 Tests and Diagnostics
3-106 PORTEGE M300 Maintenance Manual (960-504)
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 Interrupt level I/O address
COM1 4 3F8H (Default)
COM2 3 2F8H
COM3 4 3E8H
COM3 5 3E8H
COM3 7 3E8H
COM4 3 2E8H
COM4 5 2E8H
COM4 7 2E8H
Not Used Disables port
(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 Interrupt level I/O address
LPT 1 7 378H
LPT 2 5 278H
LPT 3 7 3BCH
Not Used Disables port
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 Interrupt level I/O address DMA channel
LPT 1 7 378H 3 (Default)
LPT 2 5 278H 3
LPT 3 7 3BCH 3
Not Used Disables port