char = FPutC(fh, char)
    D0           D1   D2
    LONG FPutC(BPTR, LONG)
    
   
  
    Writes a single character to the output stream.  This operation is buffered.  Use 
Flush() between buffered and unbuffered I/O on a FileHandle.  Interactive filehandles are flushed automatically on a newline (line feed, ASCII code 10), return (carriage return, ASCII code 13) or '\0' (NUL).
  
    Older documentation indicated that you should pass a UBYTE.  The correct usage is to pass a LONG in the range 0-255.