71B: DISP, KEY$, and keyboard buffer

[Dave Britten]

Yeah, display something on the screen, then stop and wait until a key is pressed before continuing. DELAY 8,8 makes DISP work that way, but you have to manually clear the keyboard buffer with KEY$ afterward, or whatever key you pressed will perform its normal function as soon as you get to something like INPUT which reads the keyboard.

Run example 1 and press END LINE twice and you'll see what I mean.