![]() For example, when using the high-res interlaced image display code out there, does it send a real 480i interlaced signal, or is the code just faking it over 240p somehow? I'm wondering if that would have any effect on how the sync extraction works.įinally some progress here. One thing I'm wondering is whether the Jaguar ever sends different video signals/timings out. I'm hoping a quick and dirty test with the integrator into an XOR gate will yield results since I should have the parts on hand, but if it works, I'll probably order some of the L1881 chips to try those out too. ![]() My only concern with it was it appears the levels of the sync in composite video are much lower (~2v?) so it might get confused if you feed it 5v composite sync directly on the composite video input. ![]() I should have read my own research more closely the first time ? AFAICT (which isn't very far), the vsync extraction circuit it has is just a much better/more general version of the integrator + gate in the image above with some stuff in front to filter out the actual video values from the composite video wave to get composite sync from composite video first. Indeed, and also recommended in the Retro Gaming Cables article I also linked in post #5, though for converting composite video -> composite sync. It looks like the LM1881 sync extractor could fit the bill:
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