INT 1A - SNAP.EXE 3.2+ - "SNAP_CHKINSTALL" - INSTALLATION CHECK
        AX = 6F01h
        STACK: WORD 0000h
Return: AX = status
            0000h SNAP is resident
            other SNAP not present
        STACK unchanged
Program: SNAP.EXE is a TSR written by IBM and Carnegie Mellon University
          which implements the Simple Network Application Protocol, and is
          required by PCVENUS (a network shell).  The combination of SNAP and
          PCVENUS allows the use of the Andrew File System as one or more
          networked drives.
SeeAlso: AX=7400h