So he says in this article in Inc. magazine. Apparently, he got interested in programming after starting to play video games. He thought he could make his own games. He started on a Commodore computer with the Basic language—remember?
He sold his first video game for $500 at the age of 12. Read more here:
My former dissertation chair, Dr. Bernard Luskin, has made a very nice video presentation about media psychology and his own “3s” (three-S) theory of how media psychology works and how it can be used for good. Here’s the link.