I decided to keep tweaking my NTSC code and my ethernet code until I could get them to co-exist. And sure enough… it works! I can update my ethernet code in the areas of the screen that nothing is going on and still display the NTSC video.
As always, code is available here: https://github.com/cnlohr/avrcraft/tr…
The PCB and schematics are available here: https://github.com/cnlohr/avrcraft/tr… (avrcraft-microsd-glass) NOTE: 2nd layer is not needed.