[anyfoo]

Hah, that is amazing and baffling at the same time.

Elsewhere, you unfortunately sometimes have to plain emulate the instructions. VM86 mode on x86 is notorious for that; not so much when accessing memory but for all the vast privileged instructions that can trap into the monitor (e.g. CLI, IN, OUT, POPF...). VM86 Extensions ameliorated it only somewhat.

But VM86 also does not have much relevance anymore. It was a mode for running 16bit real mode software, and 64bit x86 CPUs don't support it anymore when in long mode.