Yep, The NES's original rendering is 256x240, naturally stretched to a 4:3 aspect ratio. Since TVs tended to be a little "off", Nintendo also recommended not pu

Yep, The NES's original rendering is 256x240, naturally stretched to a 4:3 aspect ratio. Since TVs tended to be a little "off", Nintendo also recommended not putting anything important in the top+bottom 8 pixels, so all the important info should be in an area 256x224. The hardware used 8x8 tiles, 16x16 color zones in the background, and could group foreground sprites into 8*16 pairs. Games also triggered various interrupts and flag registers based on tile location+overlap, so you'd need to render at the full size, then scale down for display.