The invention provides a method and an apparatus for enabling a user to
determine whether a defective location in a memory device of an
integrated circuit (IC) has been remapped to a location in a redundant
memory portion of the memory device. Users are provided with the ability
to observe the remapping, and preferably, to determine which locations in
the memory device have been remapped. The memory device includes
remapping observation logic that causes bits associated with remapping to
be output from the memory device. Preferably, a computer receives the
remapping bits and displays a description of any remapping on a display
monitor. Therefore, not only is a user able to determine whether
remapping has occurred, but also which locations in the memory device
have been remapped.