%TRUNC           Truncates Listing Fields                      TASM Directive

  %TRUNC

     This directive specifies whether object code and source code fields
     that are too long for a line in the listing file should be truncated
     (i.e. not wrapped to the next line). The alternative is %NOTRUNC,
     which specifies that such lines should be continued on the following
     line.

       Notes:     You can set listing file line widths with the %TEXT
                  directive.