This is super interesting Rochus. Are you targeting Oberon System 3 in particular because it adds tcp/ip networking support? In my opinion that would make it a much more interesting system to kick the tires on, if so!

Thanks. I rather do it as a "proof of concept" to demonstrate that the Oberon System is a (hopefully) great fit with today's microcontroller boards, particularly the Olimex ESP32-P4-PC, which even has a HDMI connector. I already migrated the system to the Raspi Zero 2 which is yet another lean target, but actually oversized for the Oberon System, which doesn't even require an MMU (not to mention multiple cores). The networking support code is currently not used, because it would require yet another (pretty complex) driver. But it might be feasible (with a lot of patience) to implement it directly on the board as soon as the system and compiler run stable on it.