Great that you like it - thanks! Some of the work of Stephen R. Kell at Kent University also covers language-based OSes and how some of their ideas might be ada

Great that you like it - thanks! Some of the work of Stephen R. Kell at Kent University also covers language-based OSes and how some of their ideas might be adapted in Unix (see [1] and [2]). The Smalltalk-80 VM is specified in Smalltalk itself (in the "Blue Book" [3]) and the Squeak VM (a Smalltalk derivative) was written in a subset of Squeak itself [4]. The great thing is that it's a lot of fun to build this (at least for me) because it's actually possible to understand the whole system. I hope my students will have fun working on topics like these, too. [1] Unix, Plan 9 and the Lurking Smalltalk. In L. de Mol and G. Primiero (eds), Reflections on Programming Systems, Philosophical Studies Series, Springer - https://www.cs.kent.ac.uk/people/staff/srk21/research/papers/kell19unix-personal.pdf https://www.cs.kent.ac.uk/people/staff/srk21/research/papers... [2] The operating system: should there be one?. In Proceedings of the 7th Workshop on Programming Languages and Operating Systems, ACM, November 2013 - https://www.cs.kent.ac.uk/people/staff/srk21/research/papers/kell13operating.pdf https://www.cs.kent.ac.uk/people/staff/srk21/research/papers... [3] Adele Goldberg and David Robson, Smalltalk-80: The Language and its Implementation, ISBN 0-201-11371-6 - http://stephane.ducasse.free.fr/FreeBooks/BlueBook/Bluebook.pdf http://stephane.ducasse.free.fr/FreeBooks/BlueBook/Bluebook.... [4] Dan Ingalls, Ted Kaehler, John Maloney, Scott Wallace, and Alan Kay. “Back to The Future: The Story of Squeak, A Practical Smalltalk Written in Itself.” In Proceedings of the 12th ACM SIGPLAN Conference on Object-Oriented Programming (OOPSLA) 1997, 318–26, 1997 - http://files.squeak.org/docs/OOPSLA.Squeak.html http://files.squeak.org/docs/OOPSLA.Squeak.html