****************************************************************************** There are two binary executables here (and compressed copies). One of them, ecdl-mmx.exe, is for use on x86 chips that implement MMX instructions, such as Pentium MMX, Pentium II, Pentium III, AMD K6, Athlon... The other, ecdl.exe, is for non-MMX chips like plain Pentium or Pentium Pro. Download using shift-click, "gunzip" the file if necessary, then "chmod u+x" it. Information on how to run it can be found in a "readMe.html" file with the source code in: http://cristal.inria.fr/~harley/ecdl7/source/32-bit/ ******************************************************************************