Basically we use a base Linux and modified Squeak to use SVGAlib instead of X-Windows.
Later on some friends created a whole OS in Squeak (e.g. you could browse the TCP/IP protocol as a class in Smalltalk): https://wiki.squeak.org/squeak/1762
https://github.com/nopsys/CogNOS
There is a conference paper about it, also from 2018:
https://charig.github.io/assets/papers/SCDE-DLS.pdf
Basically we use a base Linux and modified Squeak to use SVGAlib instead of X-Windows.
Later on some friends created a whole OS in Squeak (e.g. you could browse the TCP/IP protocol as a class in Smalltalk): https://wiki.squeak.org/squeak/1762