There’s virtually nothing in that clip that is factual and it’s not internally consistent. There would be no mystery about which chip is the BIOS, it’s not even

There’s virtually nothing in that clip that is factual and it’s not internally consistent. There would be no mystery about which chip is the BIOS, it’s not even self consistent with the claim of it being “off the shelf” junk. You could just dump the thing. And even if you couldn’t, 7 segment displays and other niceties were available. The oscilloscope stuff has no basis in reality. HCF is a fine series with good storytelling, but the technical stuff is all window dressing and should not be examined too closely or confused with the real deal.