5000 MC (250-6000/1/2) Math Co-processor Faxback Doc. # 1727 Contact your nearest Radio Shack Store for the catalog number of the most recent Math co-processor for the Tandy 5000MC. There is a socket on The main logic board at location U2 for the math co-processor. All you have to do is plug the co-processor chip into the 5000MC main logic board.