All, I am sending this to both IBIS-ATM ibis-macro@xxxxxxxxxxxxx and Ibis-Interconn ibis-interconn@xxxxxxxxxxxxx because of overlapping interests. ISS Package Models can simply be handled by adding to IBIS the following new key words, and a new ISS Package Model section. New keywords: iss_package_model [ISS Package Model Section] iss_package_file iss_package_subckt iss_package_arguments end_iss_package_model [End ISS Package Model Section] I am enclosing the modification to BIRD 122 that supports this totally in the .ami file. I am also including an IBIS file that demonstrates the use precedence of package models for pins, model and component, and various ways that this can support parameter passing, rail voltage ports, . I did not include an example of a crosstalk_iss_package_model, this is a straightforward extension, but I did not want to complicate the discussion of the basic structure of this method. Unfortunately, I will not be able to attend this week's meetings. Walter Walter Katz wkatz@xxxxxxxxxx Phone 303.449-2308 Mobile 303.883-2120