Printable characters include the tab character (09 hex), those
  ASCII characters with codes in the range 20(hex) through 7E(hex),
  and those characters in the DEC Multinational Extension to the
  ASCII Character Set with codes in the range A1(hex) through
  FE(hex).

  Printable characters that are not in the Fortran 95/90 character
  set (see CHAR FORTRAN_90 in online Help) can only appear in
  comments, character constants, Hollerith constants, character
  string edit descriptors, and input/output records.