AST RESEARCH TECHNICAL BULLETIN TB-0090                   5-28-85


              ADVANTAGE SERIAL PORT #2 UPGRADE KIT


The  following  information is to clarify the locations in  which 
the upgrade components are to be installed.  These components are 
supplied  with the Serial Port #2 Upgrade Kit (Part  #500212-011, 
Model #ADV-000S) for the Advantage board.

         COMPONENT          LOCATION ON ADVANTAGE BOARD

            1489                       U72
            1488                       U80
           16450                       U73

Note  that component 74LS125,  which is listed in  the  Advantage 
Option  Installation Guide,  Section #2 Serial Port,  is  already 
soldered on the board.