Notes about MIPS by Lin Jensen, Bishop's University
http://en.wikipedia.org/wiki/MIPS_architecture
SIMULATORS
SPIM's home page: downloads, documentation, and version changes
A user's guide to SPIM by James Larus, the author
User documentation for PCSpim, the Windows version of SPIM (PDF) (Postscript) [note pages are out of order]
PCSPIM.HLP file for version 6.4 (corrected version)
MARS