In message <200004191158.UAA08095@dec146.aist-nara.ac.jp> Toru
Nishimura writes: 
: I got the book last evening and (as predicted) lack of good sleep

Excellent book.  Highly recommended.

See MIPS Run
Dominic Sweetman
Morgan Kaufmann Publishers Inc
San Francisco CA
ISBN 1-55860-410-3

: He guessed correctly.  I happen to know some of NEC semiconductor
: guys, and they sometimes unaware of what MIPS processor design is
: trying to solve, particularly in the area of how operating system
: would utilize the processor design.

Although designed to be simple, one cannot easily make the MIPS ISAs
simpler without breaking some critical feature or another...

Warner