I made a small note that describes MIPS VIPT cache characterics, parameters and "which bits participate in index and tag." Included are; RM7000, RM5200, R5000, R4600/4700, R4300i, R4000/4400 and R10000. http://www.alkyltechnology.com/files/MIPScacheparams.pdf More will follow. Toru Nishimura/ALKYL Technology