zlacker

This is not true. Almost all firmware is signed by every vendor, and there are standards from Intel and amd on implementation of code signing.

Look up Intel pfr.

>>gpapil+(OP)
Signed ≠ enforced.

At least for 4677 Intel stuff, gigabyte & HP and others let you modify the firmware and flash it.

>>buildb+JA
HPE at least makes you flip a DIP switch, otherwise it complains loudly and halts.