Yep. that's my concept. But it needs about 1MB very fast RAM, to work well. For instance, 100 Hz output may need very high freq. pixel clockrate. And during it, RAM must be accessible for writing from ST side. SRAM is very expensive. So, probably should go on SDRAM, but it needs more complex control. 100 Hz sounds great, but what monitors can do it ?exxos wrote: ↑Tue Jan 02, 2018 10:39 pmProbably one method is to copy the video data from shifter (binary outputs) and use a PLD (assuming enough RAM) for frame buffer. Then the frame/ram buffer would be dual channel, so any refresh rate could be used, and is read from the buffer. Buffer could output at 100hz then for example.
Maybe 75 Hz is what should target - that works on most of cheaper monitors, in little lower resolutions.
Just tested Steem in fullscreen mode, refresh rate set to 75 Hz, at res 640x480, 50 fps game (Sideways), and it was perfect - no tearing (when V-sync on), no visible judder. 75 Hz is max what my monitor can, and I think that it is same with majority.