Hold up there. The NES and SNES both had the large, brick style power adapters. I know this because I have both systems.NES, SNES, N64, NGC, Wii and WiiU all had those power bricks in between but the end of the power adapter was standard and would fit on any power mains.
The N64 was the first to not have it, because the brick was integrated into the back of the system.