Upper right quadrant would be an 8-bit (or maybe 16-bit) CPU paired with a 3D graphics capable GPU. SNES + the SuperFX chip is the closest example I can think of. Similarly, there is the Genesis/Mega Drive + SVP chip.
I can't name a fully 8-bit machine with a 3d focused graphics chip. Maybe there are arcade boards?
I can't name a fully 8-bit machine with a 3d focused graphics chip. Maybe there are arcade boards?