Not dumb at all. I worked with an ST Micro processor and small TFT display. The routine to write to the screen was to save the contents to RAM and then point a

Not dumb at all. I worked with an ST Micro processor and small TFT display. The routine to write to the screen was to save the contents to RAM and then point a graphics renderer to that RAM. Double and triple buffering were required to avoid screen tearing (screen update with partial previous and next screen mixed.)