#RetroBSD is a port of 2.11 #BSD #Unix intended for embedded systems with fixed memory mapping. The current target is #Microchip #PIC32 #microcontroller with 128 kbytes of RAM and 512 kbytes of Flash. PIC32 processor has #MIPS M4K architecture, executable data memory and flexible RAM partitioning between user and kernel modes.

https://github.com/RetroBSD/retrobsd/wiki (via #GCU)