Irq assignments – Dell Inspiron 2000 User Manual
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IRQ Assignments
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
to configure the device for one of the available IRQ lines.
Table 2. IRQ Line Assignments
0270:Real time clock
error
The CMOS battery that supports data
stored in NVRAM may be dead.
Call Dell for technical assistance.
0231:Shadow RAM
failed at offset:
nnnn
Shadow RAM failed at address nnnn. Call Dell for technical assistance.
0210:Stuck Key
If the built-in keyboard is being used,
it may be faulty. A key on the built-in
keyboard may have been pressed
while the computer was booting.
Run the Stuck Key test in the Dell Diagnostics. If the problem cannot
be corrected, call Dell for technical assistance.
0250:System battery
is dead—Replace and
run Setup
The system battery does not have
enough charge to power the
computer.
Connect the computer to electrical power to recharge the battery, or
replace the battery. Then check your system setup settings.
02D0:System cache
error—cache disabled
The primary cache internal to the
microprocessor has failed.
Call Dell for technical assistance.
0251:System CMOS
checksum bad—default
configuration used
The BIOS has been changed.
CMOS has been corrupted or
modified, possibly by an application
program that changes data stored in
CMOS.
Reboot the computer. As soon as you see the Dell logo screen, press
the problem persists, call Dell for technical assistance.
0230:System RAM
failed at offset:
nnnn
System RAM failed at address nnnn
in the 64-KB block at which the error
was detected.
Call Dell for technical assistance.
0260:System timer
error
A chip on the system board may be
malfunctioning.
Run the System Set test group and the Keyboard Controller Test in
the Dell Diagnostics.
NOTES: Installed devices cannot share the same COM port address. The default address of your computer's serial port is COM1.
To view IRQ line assignments in the Microsoft® Windows® 98 operating systems, 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.
IRQ
Line
Assigned Device
IRQ0
Reserved; generated by the system timer
IRQ1
Reserved, generated by the keyboard controller
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 real time clock
IRQ9
SCI in ACPI mode
IRQ10
PCI IRQA, B, C, D
IRQ11
Available
IRQ12
Reserved; generated by the keyboard controller to indicate that the output buffer of the touch pad or PS/2 mouse is full
IRQ13
Reserved; generated by the math coprocessor
IRQ14
Reserved; generated by the hard-disk drive to indicate that the drive requires the attention of the microprocessor
IRQ15
Reserved; generated by the CD-ROM or DVD-ROM drive in the external media bay to indicate that the drive requires the attention of