For Linux/UNIX:
Follow the guideline of SPIM website, the only unclear part for some of you might be 
how to set paths for TRAP_DIR, BIN_DIR and MAN_DIR. It is done by doing the following 
under UNIX prompt.

setenv TRAP_DIR <$your_spim_directory>/spim-6.5/trap_dir
setenv BIN_DIR <$your_spim_directory>/spim-6.5/bin
setenv MAN_DIR <$your_spim_directory>/spim-6.5/man

After finishing all the guided steps of installation, type xspim under Linux prompt 
to enjoy the tool.


For MS Windows:
Download the pcspim.zip file, unzip it, and click on setup.exe. Everything is 
automatically set up. A new PCsim shortcut will show up in your Start menu.

For Windows, you can ignore some warnings (e.g. label __start complaint) popped 
up when you load your assembly files, but be careful when you see an error.