Int 2F Fn 1216  U - Dos 3.0+ Internal - Get Address Of System File Table   [D]

   AX = 1216h
   BX = system file table entry number

Return: CF clear if successful
       ES:DI -> system file table entry
       BX = relative entry number in system file table containing entry
       AX destroyed
   CF set if BX greater than FILES=

Note:  supported by DR DOS 5+

See Also: AX=1220h