That title looked familiar, so I checked, and it looks like we've had recent submissions from the same site for reverse engineering of different parts of the 8086:
https://en.wikipedia.org/wiki/NEC_V20
to say
"The NEC V33 is a super version of the V30 that separates address bus and data bus, and executes all instructions with wired logic instead of micro-codes, making it twice as fast as a V30 for the same clock frequency. V33 has the performance equivalent to Intel 80286. NEC V33 offers a method to expanding the memory address space to 16M bytes. It has two additional instructions BRKXA and RETXA to support extended addressing mode. The 8080 emulation mode was not supported."
On the contrary! These posts are fascinating and captivating!