And the empty upper right corner was a fabrication test structure; it's missing in the simulation because it was completely isolated from the rest of the chip.

And the empty upper right corner was a fabrication test structure; it's missing in the simulation because it was completely isolated from the rest of the chip. You can see it in the die shots here: http://www.visual6502.org/images/pages/Nintendo_RP2A_die_shots.html http://www.visual6502.org/images/pages/Nintendo_RP2A_die_sho...