$G.                      Input File Buffer                       Default: $G0

 {$G<size>}

    Defines the standard Input file buffer.

    If <size> is 0, the Input file refers to CON: or  TRM: (See $B.).

    If <size> is nonzero, the Input file refers to the MS-DOS  standard
    input handle, and the $D. directive applies to this type of file.

    This directive MUST appear at the start of the program.

          Range:    Entire program.