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Basic Troubleshooting
3-9
Some programs may leave portions of their setup information behind, even though
you have exited from them. As a result, other programs cannot run. Rebooting the
computer can confirm whether or not these programs are the cause of the problem.
Other programs use specialized subroutines called
drivers
that can cause problems in
the computer. For example, a variation in the way the data is sent to an external
monitor may require a special screen driver program that
expects
a certain kind of
video mode or monitor. In such cases, you may have to develop an alternative method
of running that particular program—for example, the creation of a boot file made
especially for that program. For help with this situation, call the support service
offered by the manufacturer of the software you are using.
Problems can arise if two devices attempt to use the same interrupt request (IRQ)
line. To avoid this type of conflict, check the documentation for the default IRQ line
setting for each installed device. Then consult Table 3-2 to configure the device for
one of the available IRQ lines.
NOTES: Installed devices cannot share the same COM port address. The default
address of the computer’s serial port is COM1.
To view IRQ line assignments in the Microsoft Windows 98 operating system, click
the
Start
button, point to
Settings
, and click
Control Panel
. Double-click the
System
icon. Select the
Device Manager
tab, and then double-click
Computer
.
"$% 145#'''
IRQ0
Reserved; generated by the system timer
IRQ1
Reserved; generated by the keyboard controller to signal that
the keyboard output buffer is full
IRQ2
Cascade from the secondary interrupt controller
IRQ3
Available
IRQ4
Serial port; available if serial port is not configured for COM1 or
COM3
IRQ5
Available
IRQ6
Generated by the diskette drive controller to indicate that the
diskette drive requires the attention of the microprocessor
IRQ7
Parallel port; available if parallel port is disabled
IRQ8
Reserved; generated by the system I/O controller's real time
clock
NOTE: For the full name of an abbreviation or acronym used in this table, see the Glossary
in the system Help.
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