Grandpa, Tell Me The Story Again About The A20 Gate

After my previous article on the keyboard controller interface , there was a global public outcry (well, OK, there was Rothman ) absolutely begging for a follow-up on the A20 gate. And so here we are. Anyway, how can you call yourself a BIOS blog and not have an article on the A20 gate??? First, an anecdote. The year was 1999. Dell Technologies hosted a regular technology forum for the engineering…