Those two chips are a lot more different than I'd expect. (Even taking into account the 90 degree rotation.) In particular, the ALU (upper-left in Intel photo)

Those two chips are a lot more different than I'd expect. (Even taking into account the 90 degree rotation.) In particular, the ALU (upper-left in Intel photo) is fairly regular, while the ALU in the Russian photo (lower-left) looks like random logic. And the PLAs and instruction register seem entirely different between the two. I was skeptical at first, but I think it's possible that the Russian chip is a different implementation, and not just the same circuitry with the layout re-done for their process. It would require a closer look at the circuitry to determine for sure. For the first link, removing https will avoid the expired certificate warning: http://vintageteardown.com/wp-content/uploads/2018/04/Intel8080A_10x-1.jpg http://vintageteardown.com/wp-content/uploads/2018/04/Intel8...