HN user
In a word: no. Processors this simple don't implement any of the features you mention, including multi-level memory hierarchies, and I doubt the author had any inclination to make the assembler self-hosting.
It seems superficial to concentrate on a few kilobytes of binary blobs as a security issue when millions of logic gates are also hidden from user scrutiny by design in most computers. That the number of people you have to trust now includes firmware developers in addition to hardware designers is a small movement in the scheme of things, though it may be a movement in an undesirable direction.