protected void writeLSD() throws IOException {
  writeShort(width);
  writeShort(height);
  out.write((0x80 | 0x70 | 0x00| palSize));
  out.write(0);
  out.write(0);
}

protected void writeLSD ( ) throws IOException { writeShort ( width ) ; writeShort ( height ) ; out . write ( ( 0x80 | 0x70 | 0x00 | palSize ) ) ; out . write ( 0 ) ; out . write ( 0 ) ; }
writes logical screen descriptor
