Aubrey, I've been using them on Intel platforms for maybe 5 years now. The ones I've used have been unencrypted and worked in both Synopsys HSPICE and Mentor Hyperlynx. They are not easy to use but are extremely detailed and I believe accurate. I agree with Hermann and would prefer IBIS-AMI (which btw Intel has for recent parts.). Joseph ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu