86Box (formerly PCem Unofficial, PCem Experimental, or PCem-X) is a fork of the PCem emulator, which aims to emulate IBM compatible machines from 1981-2000 period. This branch adds several emulated motherboards.
1) Download the development environment from http://tinyurl.com/pcemude. Afterwards, extract it to your desired location. Of course, also clone the repository in your desired location. Downloading ZIPs is not recommended, as it makes it more inconvenient to keep the code up-to-date. To avoid issues, make sure neither path has spaces in it.
2) In the extracted environment folder, you will find a script called **mingw32_shell.bat**. Launch it. There are other shell launching scripts in there, but you should not use them.
3) Once launched, run **pacman -Syuu** in order to update the environment. Depending on the state of the downloaded DE, you may need to run it twice (once initially, and then again after re-entering the environment). Make sure to keep the enviroment up-to-date by re-running the command periodically.
4) Once the environment is fully updated, **cd** into your cloned **86box\src** directory.
5) Run **make -j*N* -fmakefile.mingw** to start the actual compilation process. Substitute *N* with the number of threads you want to use for the compilation process. The optimal number depends entirely on your processor, and it is up to you to determine the optimal number. A good starting point is the total number of threads (AKA Logical Processors) you have available.
7) In order to test your fresh build, replace the **86Box.exe** in your current 86Box enviroment with your freshly built one. If you do not have a pre-existing 86Box environment, download the latest successful build from http://ci.86box.net, and the ROM set from http://tinyurl.com/roms201708.
