TAG MIL-BOOK 20 Series - Manual (Page 128)

8-12 Troubleshooting
Modem Problems
The modem does not work.
Make sure that the modem driver is correctly installed.
Make sure that the telephone line is properly connected.
Make sure that the COM port in the communication software is
correctly set.
Turn off power management.
PC Card Problems
The PC card does not work.
Make sure that the PC card is correctly seated.
If the card requires an IRQ (Interrupt ReQuest), make sure that there
is one available.
The PC card may be attempting to use a COM port in a manner that
conflicts with the COM port being used by another device. Try
running the SCU program to change the COM port setting. If your
PC card uses COM1, set COM1 as Disabled. If your PC card uses
COM2, set COM2 as Disabled. If your PC card uses COM4, set
COM4 at Disabled.
WARNING: COM3 is reserved for use by the touchscreen, do not disable it. If COM1/2
is disabled and COM3/4 is enabled on the SCU Setup (refer to chapter 5), upon booting
system would recognize the enabled COM3/4 and designate it as COM1/2.
The following table is the default settings:
COM Port I/O (Input/Output) Port IRQ (Interrupt ReQuest)
COM1 (available) 3F8 IRQ4
COM2 (available) 2F8 IRQ3
COM3 (reserved for
touchscreen only) 3E8 IRQ5
COM4 (available) 2E8 IRQ11