Students Make Atari Games Look Like Atari Again

> images might linger after they had moved or changed. Atari programmers took advantage of this feature to "flicker" objects between frames.

Interesting that they turned this bug into a feature. Pacman's ghosts were literally "ghosting".

For a cool example of CRT simulation, check out Xscreensaver's Apple II mode, written by tlb.

I've seen similar filters in emulators for years.