PCB CAD Programs

Another thing about autorouters, Unless the eda tool lets you enter constraints, it's not going be to of significant value. KiCad doesn't have the greatest autorouter. But then you wouldn't find a decent one unless you get a professional eda tool (which lets you enter constraints). Even though a processor such as the 6502 isn't high speed(concerning crosstalk,etc) you still don't want to get the spaghetti out of an autorouter--which most of these low end eda tools provide. For such a small board your better off to manually route the board--where you route the address/data bus cleanly across the board, and control signals and clocks are not intermingled with them. =Dan [ vintage electrons are just as good ] [ http://ragooman.home.comcast.net/ ] Richard A. Cini wrote: