My first guess was similar to Del's ... thought it was some sort of audio connector ... but from what you described, a quick search on google yields the most likely answer ...

http://en.wikipedia.org/wiki/S-Video

...Before the mini-DIN plug became standard, S-Video signals were often carried through different types of plugs. For example, the Commodore 64 home computer of the 1980s, one of the first widely available devices to feature S-Video output, used an 8-pin standard size DIN plug on the computer end and a pair of RCA plugs on the monitor end...

Ron
Cannabis.com Reviewed by Cannabis.com on . anyone know electronics/computers well? can someone tell me what kind of connection this is called.... Rating: 5