Error Messages, IRQs, and Memory Assignments: Dell Latitude LS Portable Computers User's Guide

02D0:System cache error—cache disabled

0251:System CMOS checksum bad—default configuration used

0230:System RAM failed at offset:

nnnn

0260:System timer error

The primary cache internal to the microprocessor has failed.

The BIOS has been changed.

CMOS has been corrupted or modified, possibly by an application program that changes data stored in CMOS.

System RAM failed at address

nnnnin the 64-KB block at which the error was detected.

A chip on the system board may be malfunctioning.

Call Dell for technical assistance.

Reboot the computer. As soon as you see the Dell logo screen, press <F2> to enter the system setup program and reconfigure the system. If the problem persists, call Dell for technical assistance.

Call Dell for technical assistance.

Run the System Set test group and the Keyboard Controller Test in the Dell Diagnostics.

Avoiding IRQ Assignment Conflicts

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 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 your computer's serial port is COM1.

To view IRQ line assignments in the Microsoft® Windows® 95 and 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.

Table 2. IRQ Line Assignments

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

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Dell PP01S technical specifications Avoiding IRQ Assignment Conflicts, 0260System timer error