No URL.  We just have boards that we or other parts of Lucent
built all using 603e cores and that's what we support.  The 8260
is a kitchen sink chip with various serial interfaces that can
be microprogrammed into being different flavors of ether or serial
controllers, an MMU, a 603e core, caches, etc.

I really don't know what's in any of the MACs.  I just went to the
apple web pages and haven't been enlightened.