Please make sure you have the latest version of the JRE installed. You can use java -version on the command line to see. Make sure it’s at LEAST 1.9 or 10.0. (Yeah. They changed their version numbering at some point.)

You can install the JRE from this link.

I have made changes to both programs to improve usability and fix annoying bugs. Please download and use my versions instead of the ones listed on their respective websites.

MARS - This is the MIPS simulator we’ll be using for the first half of the course.

Logisim - This is the circuit simulator we’ll be using for the second half.

If you run into problems with these programs, PLEASE let me know!

Running MARS

First, try double-clicking the JAR file. This works for a lot of people.

If it doesn’t, go into your terminal/command line, and do the following:

  1. cd to the directory where you have the JAR file.
  2. run this: java -jar Mars_2201_0902.jar
    • try typing java -jar Mars and then hit the Tab key. It will complete the filename for you.

It should run. If it doesn’t, it will show some kind of error/exception. Please let me know if you get an error when running it, and report this info to me when you do.

Changes to MARS

Changes to Logisim