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        Connection control (INT 21h, E3h - Novell NetWare 4.0)

        Entry:
          AH = E3h
          DS:SI -> requst buffer
          ES:DI -> reply buffer
          Subfunction in third byte of request buffer
            00h  Login
            01h  Change password
            02h  Map user to station set
            03h  Map object to number
            04h  Map number to object
            05h  Get station's logged information
            06h  Get station's root mask (obsolete)
            07h  Map group name to number
            08h  Map number to group name
            09h  Get memberset M of group G
            0Ah  Enter login area
            0Bh
            0Ch
            0Dh  Log network message
            0Eh  Get disk utilization (Advanced NetWare 1.0)
            0Fh  Scan file information (Advanced NetWare 1.0)
            10h  Set file information (Advanced NetWare 1.0)
            11h  Get file server information (Advanced NetWare 1.0)
            12h
            13h  Get internet address (Advanced NetWare 1.02)
            14h  Login to file server (Advanced NetWare 2.0)
            15h  Get object connection numbers (Advanced NetWare 2.0)
            16h  Get connection information (Advanced NetWare 1.0)
            32h  Create object (Advanced NetWare 1.0)
            33h  Delete object (Advanced NetWare 1.0)
            34h  Rename object (Advanced NetWare 1.0)
            35h  Get object ID (Advanced NetWare 1.0)
            36h  Get object name (Advanced NetWare 1.0)
            37h  Scan object (Advanced NetWare 1.0)
            38h  Change object security (Advanced NetWare 1.0)
            39h  Create propery (Advanced NetWare 1.0)
            3Ah  Delete property (Advanced NetWare 1.0)
            3Bh  Change property security (Advanced NetWare 1.0)
            3Ch  Scan property (Advanced NetWare 1.0)
            3Dh  Read property value (Advanced NetWare 1.0)
            3Eh  Write property value (Advanced NetWare 1.0)
            3Fh  Verify object password (Advanced NetWare 1.0)
            40h  Change object password (Advanced NetWare 1.0)
            41h  Add object to set (Advanced NetWare 1.0)
            42h  Delete object from set (Advanced NetWare 1.0)
            43h  Is object in set? (Advanced NetWare 1.0)
            44h  Close bindery (Advanced NetWare 1.0)
            45h  Open bindery (Advanced NetWare 1.0)
            46h  Get bindery access level (Advanced NetWare 1.0)
            47h  Scan object trustee paths (Advanced NetWare 1.0)
            C8h  Check console priviledges
            C9h  Get file server description strings
            CAh  Set file server date and time
            CBh  Disable file server login
            CCh  Enable file server login
            CDh  Get file server login status
            CEh  Purge all erased files
            CFh  Disable transaction tracking
            D0h  Enable transaction tracking
            D1h  Send console broadcast
            D2h  Clear connection number
            D3h  Down file server
            D4h  Get file system statistics
            D5h  Get transaction tracking statistics
            D6h  Read disk cache statistics
            D7h  Get drive mapping table
            D8h  Read physical disk statistics
            D9h  Get disk channel statistics
            DAh  Get connection's task information
            DBh  Get list of connection's open files
            DCh  Get list of connections using a file
            DDh  Get physical record locks by connection and file
            DEh  Get physical record locks by file
            DFh  Get logical records by connection
            E0h  Get logical record information
            E1h  Get connection's semaphores
            E2h  Get semaphore information
            E3h  Get LAN driver's configuration information
            E5h  Get connection's usage statistics
            E6h  Get object's remaining disk space
            E7h  Get server LAN I/O statistics
            E8h  Get server miscellaneous information
            E9h  Get volume information
        Return:
          AL = error code