Tom/Ken, In order to simulate a cam chip as a "full chip" model, we need a file "chip.edf.v" that has been "awked" to include the necessary changes for both the cam and interface chips. Ken, assuming this job falls to you, you will need to know that the changes for the interface are in the file "/im/faust/bin/fix-edf.v.awk". Of course, the clock assignment statement in this file should be replaced by the one you use in "chip1.edf.v". See you tomorrow, Doug