TANDY  1000 HD  (25-1001)         Math Coprocessor      Faxback Doc. # 1274

The Tandy 1000 HD original version does not contain a socket for the 8087
math co-processor option.  The Trionix 8087 Adapter 90-2070 is sold 
through Special Order Hardware.  The adapter allows you to add a math
co-processor to your 25-1001 computer.  The math co-processor is sold 
separately as 90-2120. You can obtain these items from your Radio Shack 
Store.

Note: 90-2120 is a 5MHZ Intel 8087 Math Co-Processor