Oops, I should have made it clear that I was speaking only about WIREWRAP boards! I did not mean to imply in any way whatsoever that you could put unibus boards in say a negibus backplane, unless you like the smell of burnt circuitry.. that was also the reason for my note about their electrical signals being totally different, i.e. that unibus boards might have the same connectors as qbus boards, but they are electrically different... Dear lord I hope nobody cooked anything by mistake!!! Will J ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com