Implementation of C++ Exceptions ?

Where can i get information about implementaion details of C++ exceptions ?
Bjarne S. and others have stated that this can be implemented with very
little or no overhead for a normal running program (as long as no exceptions
are thrown) but current implementations known to me Borland C++ and Watcom
have a lot of overhead when Exceptions are enabled.

I shall use this for my graduation work. - Any info will be greatly
appreciated!!!

Please mail mmc@imada.ou.dk

Thanks

Morten M. Christensen
Odense Uni.,
Denmark