I like how he blindly assumes that there was a "system time", or that there was a way to asynchronously poll for keyboard input. At least on the Apple II I gre

I like how he blindly assumes that there was a "system time", or that there was a way to asynchronously poll for keyboard input. At least on the Apple II I grew up with, timekeeping required third-party hardware, and the only way to get user-input without writing assembly was INPUT, which paused the program until the user typed something and hit Return.