I assume they exist somewhere, but the closest thing I've ever seen to a tech reference or service manual for any macintosh was the Chilton's book on macintosh repair. (Yes, the same people who do automobile repair books...) It have that book, and it's relatively decent. Only covers old goldfish-bowl style macs, though. :) The copy I have, though, is the only copy of the book I've ever seen. Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '