I can't find it now, but someone ported nommu linux to those cortex-m3 "bluepill" development boards that could be bought for ~$2 (they were built wrong and liquidated for a massive discount).
Seeing the title of this submission reminded me of it because I messed around with it a bit a few years ago.
Seeing the title of this submission reminded me of it because I messed around with it a bit a few years ago.