there are a few schematics for Amiga hard disk controllers floating around the 'net, of varying degrees of complexity - I'll see if I've still got any bookmarked. I seem to remember that the most promising one was all in Russian though. I went overseas before I could try wiring anything up unfortunately, but maybe I'll get back on the case someday... cheers Jules Everything you'll ever need on one web page http://uk.my.yahoo.com