For any North Star Advantage owners... I have scanned the complete NorthStar Advantage Technical manual and posted it to my site (look under the North Star Advantage listing). This is a BIG book, and a very large (30M PDF) scan. It contains full technical descriptions, schematics etc. for the North Star Advantage computer. Dave -- dave06a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.classiccmp.org/dunfield/index.html