HP OmniBook 5500 Familiarization Manual page 41

Message
RAM PARITY ERROR AT LOCATION xxxx
ROM AT xxxx (LENGTH YYYY) WITH NON-ZERO
CHECKSUM (zz)
TIME/DATE CORRUPT - RUN SCU
UNEXPECTED AMOUNT OF MEMORY - RUN SCU
CMOS RAM TEST FAILED
DMA CONTROLLER FAULTY
FAULTY DMA PAGE REGISTERS
FAULTY REFRESH CIRCUIT
INTERRUPT CONTROLLER FAILED
ROM CHECKSUM INCORRECT
Possible Cause
A RAM parity error occurred at the specified
(hexadecimal) location.
An illegal adapter ROM was located at the specified
address. An external adapter (such as a video card)
may be causing a conflict.
The time and date stored in the real time clock have
be corrupted, possibly by a power loss.
The amount of memory detected by POST does not
match the amount specified in CMOS RAM.
A walking buit test of CMOS RAM locations 0E (Hex) -
3F (Hex) failed.
A sequential read/write of the transfer count and
transfer address registers within the primary and
secondary DMA controllers failed.
A walking bit read/write of the 16 DMA controller page
registers starting at location 80 Hex failed.
A continuous read/write test of port 61h found that bit
4 (Refresh Detect) failed to toggle within an allotted
amount of time.
A sequential read/write of various Interrupt Controller
registers failed.
A checksum of the ROM BIOS does not match the
byte value at F000:FFFF.
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