Some simple microprocessor kit enhancements

SC/MP data sheet National Semiconductor Corporation 1976, SC/MP technical description, National Semiconductor Corporation Publ. No 4200079A 1976, SC/MP Introkit user's manual, National Semiconductor Corporation Publ. No 4200113A Stockton, 1977, Two simple, fast hexadecimal RAM loaders for small SC/MP systems, Vol 3 1976 SC/MP instruction guide National Semiconductor Corporation Publ. No 4200110A