My favourite part: It’s a cycle-counting effect, as there is simply no time to monitor for horizontal retrace. To ensure the cycle counting was consistent, se

My favourite part: It’s a cycle-counting effect, as there is simply no time to monitor for horizontal retrace. To ensure the cycle counting was consistent, several things were done including changing the system default DRAM refresh from it’s default interval of 18 to 19, to get the DRAM refresh periods to line up with CRTC accesses. (previous HN discussion: https://news.ycombinator.com/item?id=9338944 https://news.ycombinator.com/item?id=9338944)