Video toaster and add-on cards

Hello, I just picked up an Amiga Video Toaster (just the CPU unit). Inside on the left are the video toaster cards, but the two right-most slots have full length cards made by Digital Processing Systems Inc. The cards are daisy chained to a connector on the motherboard. Each card has four BNC connectors, a 5-pin DIN, an RJ-11 jack and a three-position switch on the rear slot panel. The back side of each card is covered with a full-length aluminum shield. The only identifying numbers I've found, besides the FCC ID, is "743-770", then "PT2 REV-3, Made in Canada". There is also a Supra memory card with 6 MB (three of four rows populated) and an A2091 hard card. I haven't tried to boot this yet since I need to locate an Amiga keyboard, but I'd be interested to know if anyone has any documentation on the Digital Processing Systems cards. Thanks! Cheers, Dan