So I realized that my zcl source code was no longer available online. So here it is once again.
You will need Lazareus to be able to compile this.
Source Code
http://seanscorner.usr.sh/wp-content/uploads/2014/06/zcl.tar.gz
Lazareus
http://www.lazarus.freepascal.org/
Cheers 😃