World's Thickest Book

Intel should publish all of their documentation, including

http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-manual-325462.html
and
http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-optimization-manual.html

in one book.

>>44
There's more to the MMU than that. Protection and address space virtualization are still useful even if you don't want deal with replacing pages on demand.

Also, it's obvious why the 8051 is still around: Intel no longer controls the ISA. With an 8051, you needn't worry about having your single source abandon you when their view of the market changes.