Similar to how Bell Labs Inferno worked. The kernel to user space interface was a register based VM called Dis. The entirety of user space was written in Limbo,

Similar to how Bell Labs Inferno worked. The kernel to user space interface was a register based VM called Dis. The entirety of user space was written in Limbo, the predecessor to Go (Both designed by Rob Pike), which allowed the whole of userspace and thus the bulk of the OS to be completely CPU independant. A JIT kept things speedy and performance penalties were about 30%. So your entire OS stack was CPU independent which allows applications to be written on an X86 machine and then ran on an Arm box with zero recopilation. True write-once-run-anywhere. I have it built on my raspberry pi B+, Linux 32bit chroot, and there is a prebuilt Windows image available that you unzip and run.