You are being generous, the article is complete bullshit. https://en.wikipedia.org/wiki/A20_line https://en.wikipedia.org/wiki/A20_line And, of course, as poi

You are being generous, the article is complete bullshit. https://en.wikipedia.org/wiki/A20_line https://en.wikipedia.org/wiki/A20_line And, of course, as pointed by sibling poster, the i8042 is on the motherboard, not in the keyboard.