But isn't what I described pretty
much what back annotation proclaims to do? If not, al the more reason
to off a few marketing pinheads here and there.
Back annotation programs update an existing netlist with data as it was changed
during PC layout. In tracing out an unknown board, you have nothing to start
with, so you'd have to describe each node in the netlist as you trace it.
As I said, it would be a very useful program to have, but I don't know of
any existing program that automates reverse-engineering of PC boards.