It's been sometime since I looked at it, but you can see http://forums.anandtech.com/showthread.php?p=7531773 http://forums.anandtech.com/showthread.php?p=75317

It's been sometime since I looked at it, but you can see http://forums.anandtech.com/showthread.php?p=7531773 http://forums.anandtech.com/showthread.php?p=7531773 that as of 2003, it was closed source The FAQ states they decided to make the code proprietary "for security reasons and for science reasons as well".