I’ve confirmed with resident embedded controller firmware expert DHowett: port 80 is the EC’s hardware connection to the rest of the system (manufacturer diagnostics port) over which POST codes are transmitted.
That said, that list may only apply to 11th gen. I’m not sure if the codes are still the same. The codes are not error codes, but rather self-test steps (POST being Power-On Self-Test). I believe it’s telling you what check failed.
Generally speaking, once you get into the “interpreting post code bits” step, it’s best to contact support. They’ll be able to help diagnose the problem including going back and forth with engineering if necessary.