In 320x200 or 320x240 VGA, you could had essentially the same trick for scrolling window over the VRAM, checkout Mode X VGA. The Allegro library had baked-in su

In 320x200 or 320x240 VGA, you could had essentially the same trick for scrolling window over the VRAM, checkout Mode X VGA. The Allegro library had baked-in support for that, at least in the early 2000's.