> Something I'm not clear on, though, is why high-side drivers are needed
> at all
>
> Only one column is "on" at any one time, right ?

http://en.wikipedia.org/wiki/Connect_Four

http://www.geocities.com/ResearchTriangle/System/3517/C4/C4Conv.html

I've never played it. Although I might fancy a red-green game
against someone colour-blind. "Aw, sorry dude, you lost again.
Man, you stink at this. How about a game of snooker ?" ;-)

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