16
SV = IV(0x51a100) at 0x51a104    <-- See SVt_IV image below
  REFCNT = 1
  FLAGS = (PADMY,IOK,pIOK)
  IV = 1000                      <-- 4 bytes

36
SV = PV(0x5e8cc4) at 0x51a054    <-- See SVt_PV image below
  REFCNT = 1                            Four more fields than SVt_IV
  FLAGS = (PADMY,POK,pPOK)
  PV = 0x5b4334 "\207h"\0
  CUR = 2                        <-- Even though only 3 are needed,
  LEN = 12                       <-- 12 byte string buffer allocated