HP Vectra VL800, Technical Reference Manual

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7 Tests and Error Messages
Order in Which POST Tests Are Performed
1.
If the BIOS detects error 2C, 2E, or 30 (base 512K RAM error), it displays an
additional word-bitmap (
xxxx
) indicating the address line or bits that failed.For
example:
“2C 0002” means line 1 (bit one set) has failed.
“2E 1020” means data bits 12 and 5 (bits 12 and 5 set) have failed in the lower
16 bits.
The BIOS also sends the bitmap to the port-80 LED display. It first displays the
checkpoint code, followed by a delay, the high-order byte, another delay, and
then the low-order byte of the error. It repeats this sequence continuously.