[rescue] Indigo ColorBus RIP

[KRM]

Grabbed an IRIS Indigo today.  R4000 i believe but i'm not sure, don't 
have an Indigo keyboard and the battery is shot on top of that, so i've 
got some work to do before i can do an hinv on it.  It did come with a 
ColorBus RIP card.  It has an odd connection on the back of the card.  
Did these things hook directly to the printers through this connection 
as opposed to the parallel port?

I would assume these cards have little value today but i would gladly 
trade it for an Indigo keyboard and the correct blanking plate.

/KRM