In the working directory that you just created, source the provided setup file. 1.2 Source the setup file and run ModelSim Note: You will need to do this step for only the first time using the tool. Create a new working directory for ModelSim and name it, then descend into that directory using the following command lines: > mkdir ModelSim_ StudentNumber In your home directory, open a new shell. The objective of this section is to learn how to get the environment ready for the tool, take care of the licensing issues, and start the tool. 1 Environment Setup and starting ModelSim ModelSim is an HDL simulation software from Mentor Graphics.