=spim= is a simulator for MIPS AssemblyCode written by Transform.JamesLarus. There are two versions of the program. =spim= provides a commandline interface and =xspim= provides a graphical user interface to the simulator. The latter provides a view of the machines registers and memory as it runs, plus the possibility to set break points in the code. The simulator software and the documentation are available from * http://www.cs.wisc.edu/~larus/spim.html At Utrecht University spim has been installed at /projects/stratego/Spim/bin.