[nsp] Architecture question

[ringwyrm27]

Having purchased and read the Inside CIsco Architecture book, I have a question.

I see references littered throughout the internet to the CzBus architecture.  Are there any good documents on this? 

Is the 3600, 3700, 7600, & 2600 series routers architectures documented anywhere?  In detail like the IOS book?  Are they CyBus, CzBus?

Thanks in advance for answering such a basic question.

The PDF file at the Cisco-NSP site is corrupted "and can not be repaired" according to the newest version of the PDF reader...