TANDY 1000 TL/2 (250-1602) Math Coprocessor Faxback Doc. # 1228 Note: Refer to Faxback Doc. 1230 for Main Logic Board Layout. There is a socket on the main logic board at location U43 for the math co-processor. All you have to do is plug the co-processor chip into the 1000 TL/2 main logic board. ³ Use an 8MHZ Intel 80287 Math Co-Processor.