In 1990, John Romero, John Carmack, and Tom Hall were working at Louisiana software maker Softdisk.
There, they had an idea that would change PC games forever.
Sometimes you have no idea of what you're doing on a wider scale. For John and Tom, it was likely a very cool and neat technical problem they overcame while solving a problem in front of them.
That was a cool little snippet from John's perspective. I'll have to pick up a copy. I loved Masters of Doom and this seems to tell more of that story.