What is this card?

[yakumo@u.washington.edu (Christopher Thomas)]

I just picked up an Apple ][+ from a thrift store- At least I'm pretty
sure its an Apple ][+ : It runs native applesoft, but it has a caps
lock key that switches the keyboard to lowercase, which I've never
seen.

My question: It has a card plugged into a peripheral slot that I don't
recognize.  It has a Motorola processor MC6845P on it, and three chips
prominently labeled ROM-I, ROM-II, and ROM-III. It also has a
component labeled 14.318 Mhz KAI.  There is 4-pin in-line connector in
the upper forward corner.  There are a lot of other chips, but I
couldn't tell you what they are.

When I redirect output with the PR# command, the computer behaves
normally (I can execute commands), but there is no text output on the
screen.

Does anyone know what this card may be?

Thanks in advance,

Chris Thomas (yakumo@u.washington.edu)