Int 2F Fn C000  U - WANg_er.com - Installation Check                       [U]

   AX = C000h

Return: AL = FFh if installed
       ES = segment of resident code
Program: WANG_ER is a TSR from Compaq which permits Compaq systems equipped
     with 3-mode floppy drives to read Wang document diskettes

Note:  AH=C0h is the default; WANG_ER scans all multiplex numbers from C0h to
     FFh for a free spot on installation.  The installation check is
     completed by comparing the resident code with the copy in the
     transient program