That's exactly what I said. Rust compiles to binary opcodes. Assembly is not an rtos, and does not require one. ASM isn't a standard "language". It's literally a fancy display of opcodes and registers that the CPU reads to execute operations. C does the exact same thing, ie compile to opcodes. You can convert binary back and forth from ASM to opcodes with a lookup table. At its core, ASM is just a convenient way to read and write cpu opcodes. I misspoke saying "to assembly" when I meant "to binary opcodes", but such a minor pedantic misspeak I didn't think anyone who understood embedded systems would not understand the meaning. Sorry about that.