!TITLE IMP80 Changes
!TOPIC IMP80 Changes
  IMP80 ON EMAS 2900: DIFFERENCES FROM IMP9               February 1982

    This  document is intended for users of IMP on EMAS 2900 who wish to
know how IMP80 differs from IMP9.

    It should be noted that  IMP80  on  EMAS  2900  differs  in  certain
respects  from  other  implementations  of IMP80, and that this document
should not be trusted as far as other implementations are concerned.

    Some of the features of IMP80 described below exist in  IMP9.   They
are   included  either  to  help  explain  some  other  feature  or  for
completeness.