Int 14 Fn 7F  - Fossil - Remove An External Application Function           [S]

   AH = 7Fh
   AL = code assigned to external application
   ES:DX -> entry point

Return: AX = 1954h
   BL = code assigned to application (same as input AL)
   DH = 00h failed
        01h successful

See Also: AH=7Eh