Int 2D  - Dtown Utilities V1.40+ - Utility Installation Check              [U]

   AL = 11h
   BL = function
       00h get number of installed utilities

       Return: BL = number of utilities
       01h get installed utilities
       DX:DI -> buffer containing one byte for each utility

       Return: DX:DI buffer filled with flags (0=no,1=yes) indicating
             whether the corresponding utility is loaded

Return: AL = FFh if supported

Note:  this function is only available if the extended API has been installed
     in the resident portion

See Also: INT 2D/AL=10h"DTown",INT 2D/AL=20h