HP INCFollow


Modern PC will disable any debug IO interface when production to avoid hacker

attacks. The existing way used for BIOS debugging is using two-byte non-volatile memory

to record POST (Power On Self-Test) code for identifying high level BIOS driver error.

However, this debug method can’t help first triage the issue when bringing up from

customer side.

For helping to shorten the debugging period and save the service cost, we introduce the

dual post code design idea.

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