On Mon, 6 Dec 2010, Brent Hilpert wrote: > The EC-130 (and by extension the 1162) is one I have wanted to RE and produce > a simulation of, both for the vector display and because the arithmetic > technique used is different than most. Did you already have a look at the Friden patents? No. 3523282 No. 3526760 No. 3546676 No. 3725873 Christian