Today's EE Times has a front-page article about the Pentium's
internals.  A hacker in Germany reverse-engineered a number of the
chip-specific registers to determine their function, and posted the
results to the Net.  These registers are covered in Appendix H of the
Pentium User's Manual; Intel's policy is to only give Appendix H to
people who have signed an NDA.  The registers collect statistics like
cache hit rates, memory accesses, and pipeline efficiency.

Anyone who is interested in kernel performance enhancement (who
isn't?) and has a Pentium to bash on may want to check this out.

The file is ftp://ftp.tu-chemnitz.de/pub/Local/msdos/4p_v302.zip
-- 
Mike Long <mike.long@analog.com>           http://www.shore.net/~mikel
VLSI Design Engineer         finger mikel@shore.net for PGP public key
Analog Devices, CPD Division          CCBF225E7D3F7ECB2C8F7ABB15D9BE7B
Norwood, MA 02062 USA                assert(*this!=opinionof(Analog));