After the preamble, there is an x86-64 assembler, written in Yotta. The assembler makes it much easier to work with machine code, as you might expect.

However the assembler is a bit quirky, because it uses a syntax that reflects the structure of the machine code. It's neither intel syntax nor at&t syntax, but a secret third thing.

I won't get into the assembler details, but let me show you how it's used to build a forth: