> perl -MDevel::Peek -e"$a=v256;$b=v128;Dump$a;Dump$b"
SV = PV(0x182ebf4) at 0x182383c
  REFCNT = 1
  FLAGS = (POK,pPOK,UTF8)
  PV = 0x182013c "\304\200"\0
  CUR = 2
  LEN = 3
SV = PV(0x182ec24) at 0x1823848
  REFCNT = 1
  FLAGS = (POK,pPOK)
  PV = 0x182012c "\200"\0
  CUR = 1
  LEN = 2