User's Manual

60
X-C 6250 Pro Users Manual
79-0003-003 22 October 1999
Setting the COM3 and COM4 IRQs
Some modem software will not work with standard communication
(COM) port and Interrupt Request (IRQ) settings. Follow these
guidelines for the mobile computer:
COM Port IRQ Setting Change to
COM3 IRQ 11 IRQ 4
COM4 IRQ 10 IRQ 3
The IRQ must be set the same in Windows 95 (Windows 98 and NT)
and in the SCU. Follow the procedures below.
To view or change the IRQ settings in the SCU
1 From the Start Menu, select Shut Down and then choose Restart
the computer.
2 Read the text on the screen while the computer is restarting, and
press
CTRL+ALT+S as soon as the following line appears:
<CTRL+ALT+S> to enter System Configuration Utility.
3 Select Components by pressing
ALT+C.
4 Select COM Ports.
5 Press
TAB to move to COM3 or COM4 settings.
6Use the
UP and DOWN ARROW keys to switch between IRQ values,
and then press the SPACEBAR on the desired setting.
7 Choose OK to save the settings.
To view or change the Windows 95 IRQ settings
1 From the Start Menu, select Settings, Control Panel, and then choose
System.
2 Select the Device Manager tab, and then choose the plus sign next
to Ports.
3 Choose COM3 or COM4.
4 Select the Resources tab to view the current Interrupt Request
setting.
5 Make sure the Use Automatic Settings box is not checked.