Comment by carapace

Be sure to read "Project Oberon, The Design of an Operating System and Compiler" generously published online as a pdf: http://www.ethoberon.ethz.ch/WirthPubl/ProjectOberon.pdf

There are emulators for Wirth's new cpu in JS, Java, C, and Python.

You can run it in the browser from here: http://schierlm.github.io/OberonEmulator/

(Shameless plug: https://github.com/PhoenixBureau/PythonOberon I wrote the Python emulator. It is sloooooooow, but it will boot and draw the screen (after a few minutes...)