The DBCS option ensures that the listing, if generated, is sensitive to the possible presence of DBCS even though the GRAPHIC option has not been specified.
.-NODBCS-. >>-+-DBCS---+--------------------------------------------------><
The NODBCS option will cause the listing, if generated, to show all DBCS shift-codes as ".".
The NODBCS option should not be specified if the GRAPHIC option is also specified.