initial release: video fix
rev2: added audio fix by lamingaming
                                        default pal: 02F5B2D2 = 4965653
      fix for 50.27hz - "swap" pattern                                  fix for 49.19hz - "alt" pattern
      dec 3094/3178*49656530 = 48344022.6                               dec 3162/3178*49656530 = 49406528.6
      hex (0C15+1)/(0C69+1)*02F5B2D2 = rounded to 02E1ABD7              hex (0C59+1)/(0C69+1)*02F5B2D2 = rounded to 02F1E241