SV = RV(0x63fde0) at 0x604fc0
  REFCNT = 1
  FLAGS = (PADBUSY,PADMY,ROK)
  RV = 0x604fa0
  SV = IV(0x62de60) at 0x604fa0
    REFCNT = 2
    FLAGS = (PADBUSY,PADMY,IOK,pIOK)
    IV = 42                         <---