Also, in terms of old video games, this is a visualization of cpu instructions per scan line. https://www.youtube.com/watch?v=Q8ph2OVqZeM https://www.youtube.co

Also, in terms of old video games, this is a visualization of cpu instructions per scan line. https://www.youtube.com/watch?v=Q8ph2OVqZeM https://www.youtube.com/watch?v=Q8ph2OVqZeM Around 8m24s you can see how the cpu pauses while ram is refreshed on the SNES. You can see that it’s basically once a scanlije. I found it helpful to visualize how often RAM has to be refreshed (ballparked).