Getting some tools

We need some tools, in the form of software. We search for software that can be obtained without cost.

We use a Linux computer with Ubuntu 16.04, and a Mac computer with OS X El Capitan.

We decide to use Icarus Verilog.

We can install Icarus Verilog in Ubuntu, by doing

sudo apt-get install iverilog

We can install Icarus Verilog on Mac, by downloading its source code from this Icarus Verilog FTP repository.

The file verilog-20150513.tar.gz can be downloaded from the pre-v10 directory. The source can then be extracted and built, using the commands

tar xvf verilog-20150513.tar.gz 
cd verilog-20150513
sudo make install