What is the difference between the GB window and the GB background ?
The GB background map is often used as the “main” game screen map. You can scroll the background in any direction without limitations. The GB window map appears on top of the background and can only be scrolled to the right and down from the upper left screen coordinate. You can scroll it up as long as the Y coordinate is >=0. You can scroll it left as long as X coordinate is >=-7. The window is often used as a status bar on the right or bottom of the screen. No part of the window can ever be made transparent to the background under it. If you set a sprite & it’s priority to appear below the background & the window, you can see the sprite under window colo(u)r 0 but you can’t see the background under window colo(u)r 0. It is as if the window has replaced the background at all points that it appears on screen.
