NAME
        KBD_ADDRESETHANDLER -- Add a keyboard reset handler.

   FUNCTION
        Add a function to the list of functions called to clean up
        before a hard reset generated at the keyboard.  The reset
        handler is called as:
            ResetHandler(handlerData)
                         a1

   IO REQUEST
        io_Message      mn_ReplyPort set
        io_Device       preset by opendevice
        io_Unit         preset by opendevice
        io_Command      KBD_ADDRESETHANDLER
        io_Data         a pointer to an interrupt structure.
            is_Data     the handlerData pointer described above
            is_Code     the Handler function address

   NOTES
        Few of the Amiga keyboard models generate the communication codes
        used to implement this reset processing.  Specifically, only the
        Euro a1000 (rare), and the B2000 keyboard generate them.

        The interrupt structure is kept by the keyboard device until a
        RemResetHandler command is satisfied for it, but the
        KBD_ADDRESETHANDLER command itself is replied immediately.