Thread
Plus Mystery Port
Conceivably, but a realistic answer may lie in the text of the warning label that is visible in the rearside view of the Mac.
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I've seen ports like those used for microphones in a PA system.
That port looks like one of those light plugs you have on certain Front of House mixers.
one of my macintosh plus have such a port for :
KODAK DATASHOW HR/M LCD PROJECTION PAD
http://www.biocomp.net/o43488.htm
KODAK DATASHOW HR/M LCD PROJECTION PAD
http://www.biocomp.net/o43488.htm
DIN 45326 -- used for many older video monitors.
Weren't there Keyboards using that plug, too?
You're right. It's a Kodak / Sayette datashow pad connector. It was a very common mod in the day. If you open the Mac, there will be a little video daughterboard in there connected to the socket.one of my macintosh plus have such a port for :KODAK DATASHOW HR/M LCD PROJECTION PAD
Gotta love that rust! Well, at $44.99 ($20 for shipping) you can't complain too much. But regardless of the original purpose, in light of the condition of that connector, I wouldn't expect it to function as it once did.
midi?
It could possibly be a TTL video port for connecting an external monitor, as this connector was quite popular in the 1980's.
I'm still kicking myself about selling two of the Kodak/Sayette Datashow LCDs for work without realising what they were.
There's an extensive thread here discussing these video out mods which a little search fu should reveal
There's an extensive thread here discussing these video out mods which a little search fu should reveal