> At a glance it's catastrophic not having unsigned load instructions to run.
> Do you have any specific about which 4 insns really are?

Beep!  Sorry, I remember this moment why I dismissed Lextra long time ago.
It does not contain MIPS compatible MMU inside.  So, it's pretty hard to port
NetBSD to run.

Toru Nishimura/ALKYL Technology