Check out Steven M. Rubin's book, Computer Aids for VLSI Design. It's available on the web at: http://www.rulabinsky.com/cavd/ You want appendix D. Not a complete desciption of EDIF, but still pretty useful. It documents enough EDIF to describe a netlist. Best wishes John -- To unsubscribe from cores mailing list please visit http://www.opencores.org/mailinglists.shtml