C:\_32>perl -MDevel::Peek -e "Dump(+0)"
SV = IV(0x1fe2d28) at 0x343cbc
  REFCNT = 1
  FLAGS = (PADBUSY,PADTMP,IOK,READONLY,pIOK)
  IV = 0

C:\_32>perl -MDevel::Peek -e "Dump(-0)"
SV = IV(0x432d2c) at 0xd73cec
  REFCNT = 1
  FLAGS = (PADBUSY,PADTMP,IOK,READONLY,pIOK)
  IV = 0

C:\_32>perl -MDevel::Peek -e "Dump(0)"
SV = IV(0x2492d28) at 0x23cbc
  REFCNT = 1
  FLAGS = (PADBUSY,PADTMP,IOK,READONLY,pIOK)
  IV = 0