Wasn't it the ADIG card, which was then replaced by the DOG card, which was then supplemented by the DYNADIG (The DOG card was still in there along with the DYNADIG)?
I do have some vague memory of something called the DPIG card, but not enough memory scraps to put together enough of the history. Nor do I have any schematics of anything DPIG. I do have documentation on ADIG, DOGN, and DYNADIG.
Ron