This version is no longer actively maintained. TobisMa has made significant changes, that fixes many bugs I simply ingnored. This more up to date version is available at: https://tobisma.github.io/johnny/
The code is available at: https://github.com/TobisMa/johnny/tree/master
Simulation of a von neumann arcitecture
The programm is hosted by inf-schule.de https://inf-schule.de/content/7_rechner/3_johnny/johnny2/
With the hosting at inf-schule.de it does take some time for them to apply new versions and bugfixes. As such there is also a Github page at: https://laubersheini.github.io/johnny which automatically updates as soon as i make a commit to the master branch of this repo so it should always be more up to date.