↳ In-reply-to » Alright, I have a little 8086 assembler for my toy OS going now – or rather a proof-of-concept thereof. It only supports a tiny fraction of the instruction set. It was an interesting learning experience, but I don’t think trying to “complete” this program is worth my time.

The most valuable resource is Table B-13 at the end of Volume 2D of the Intel docs. It’s a very long but easy to understand table of instruction encodings – assuming you already know how that ModR/M stuff works.