Most of my simulation experience has been under windows too. I used the student version of modelsim (www.model.com), and it was pretty nice. There is a project calld freeHDL listed on www.linux.org, but I have not yet looked into it. I'll keep the list posted as to what I find. --Scott Stackelhouse p.s. if you'd like to email me personally, I would prefer you use usbdev@tampabay.rr.com. Thanks