I have placed the totally unaltered DEC Ultirx Mopac 6.0 for download on
ouchem.chem.oakland.edu(22.214.171.124). It is in pub/ultrix_certified
and a compressed tar file of the directory is
pub/ultrix_certified.tar.Z. Please see the file mopac.man in the above
directory or tar file for details on compiling, installation. The code
is absolutely virgin from Dr. Stewart's Dec 3100.