[mritun]

RP2040 is a micro-controller and does not have an MMU. It cannot natively run any OS that relies on a MMU and that includes NetBSD. One can of course write an emulator that does and run that emulator on RP2040 and NetBSD on the emulator.

edit: Emulators, of course!

[anyfoo]

This project is an emulator that is able to run NetBSD (and Ultrix, and Linux, and potentially others)!