How to install ghdl on Windows and Linux

Download and install GtkWave waveform viewer.
Download and install ghdl-0.29.1 compiler. Note that, actual version can be found here.

Start Terminal (typically Ctrl+Alt+T) and install ghdl compiler and GtkWave waveform viewer.
```
sudo apt-get install ghdl gtkwave
```

Create a new project and simulate it

Create a new project folder gates on your local disk. Do NOT use accented symbols and spaces in the path to project folder!
Create a design VHDL file gates/gates.vhd. Open the Example of basic gates and copy/paste the design.vhd code to your local gates/gates.vhd file.
Create a testbench VHDL file gates/tb_gates.vhd. Open the Example of basic gates and copy/paste the testbench.vhd code to your local gates/tb_gates.vhd file.
Create a new file gates/RUN.sh and copy/paste the content to it. In this file:
- set the TOP_ENTITY according to your testbench
- set path to your gtkwave installation on Windows or Linux
```
TOP_ENTITY=tb_gates

# For Windows
GTK=c:/APPZ/gtkwave/bin

# For Linux
# GTK=/usr/bin
```
Run Git Bash, Command Prompt (Windows) of Terminal (Linux), navigate to your project folder, and run the script.
```
# Windows Git Bash or Linux:
sh RUN.sh
```

Version	Date (YYYY-MM-DD)	Note
Linux Mint 20.3 (Una)	2022-02-24	Laptop

# FYI: How to check OS version in Linux
$ cat /etc/os-release

# Or by Neofetch
$ neofetch

VHDL

Vivado

VHDL simulators

ISE 14.7