Int 21 Fn DD  - Novell Netware - Workstation - Set Netware Error Mode      [N]

   AH = DDh
   DL = error mode
       00h invoke INT 24 on critical I/O errors (default)
       01h return NetWare extended error code in AL
       02h return error code in AL, mapped to standard DOS error codes

Return: AL = previous error mode

Note:  this function is supported by Advanced NetWare 2.0+

See Also: INT 24