There is an almost all-Smalltalk bare metal system for X86, CogNOS. It runs on top of NopSys, about 3500 lines of C and 600 lines of assembler for booting, acc

There is an almost all-Smalltalk bare metal system for X86, CogNOS. It runs on top of NopSys, about 3500 lines of C and 600 lines of assembler for booting, accessing device registers, and responding to interrupts. But the file system etc. are in Smalltalk. https://github.com/nopsys/CogNOS https://github.com/nopsys/CogNOS https://charig.github.io/assets/papers/SCDE-DLS.pdf https://charig.github.io/assets/papers/SCDE-DLS.pdf