The Nintendo Entertainment System uses a modified 8-bit NMOS CPU at 1.773447 MHz.
With its mere 2 Kb video memory, it produces 256x240 pixel resolution with a maximum palette of 25 on-screen colors.
The hardware of the NES is designed to take a cartridge that holds the game software, take input from controllers and peripheral devices, and output graphics and sound through a television. The NES was originally modeled to have cartridges input thorugh the front of the system as opposed to the top of the system.
NES Hardware Specifications