This mode is selected by the $MODE DELPHIUNICODE switch. It tries to emulate, as closely as possible, the behavior of Delphi 4 till recent versions of Delphi . On the command line, this mode is selected by the -Mdelphiunicode switch.
This mode is the same as the delphi mode, except that the String keyword indicates a UnicodeString instead of an AnisString string.