Int 6D  - Decnet DOS (before 2.1) - Data Link Layer Program                [N]

   AH = function
   ???

Return: ???

Note:  the installation check consists of testing for a signature area
     immediately preceding the interrupt handler

See Also: INT 69/AH=0Ah,INT 6C"DECnet",INT 6E"DECnet"
Index: installation check;DECnet DOS Data Link Layer

Format of signature area:
Offset Size    Description
 -5    BYTE    major version number
 -4    BYTE    minor version number
 -3   3 BYTEs  signature (ASCII "SCH")