I just got this NOS ADDS VT 220 board from Cindy and based on her testing the board is running in AT since it had a ps2 connector.
Well go it home and for sure it is running in AT mode based on the jumpers and where they are located. Also going off of a hunch, pulling mode might be the ADDS protocol since it is an ADDS board. A lot of the keys have unique scan codes for them but they are not mapped which is not really a problem. This board came with spanish caps but they are the same caps as my AMPEX220 which I am going to be using on this board instead.
Thanks for looking.(Yes this will be posted to the wiki soon.)