INT 2F U - PC Tools v7-8 DATAMON, v9+ DPROTECT - GET ???
        AX = 6284h
        BX = 0001h
        CX = 0001h
Return: AX:BX -> ??? data (see below)
        CX = BX

Format of data for v9.0:
Offset  Size    Description
 00h  5 BYTEs   ???
 05h    WORD    resident code segment (may be segment of DWORD at +03h)
 07h    DWORD   -> FAR function to sound alert tone
        ???

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