📰 New article from RetroRGB
NES “Wobbly” Composite Video Explained
https://retrorgb.com/nes-wobbly-composite-video-explained.html
Ever stare at a 30-year-old NES cartridge and wonder why the colors seem to vibrate slightly on a composite TV? It’s not just your eyes playing tricks on you. It’s a genuine, hardware-level quirk that has baffled retro gaming enthusiasts for years.
Nicole Express recently cracked the code behind this “wobbly” effect, and the explanation is surprisingly technical. Essentially, the NES generates composite video natively, which forces it to handle synchronization differently than consoles that output RGB signals first. In a perfect world, the colorburst would sync every two lines. But the NES? It syncs every three.
This mismatch creates a visual rhythm that alternates frame-by-frame, resulting in a shimmering effect that looks a lot like horizontal interlacing. To make it work without crashing, the system’s crystal oscillator, PPU clock speed, and dot clock have to align mathematically perfectly. It’s a tightrope walk of engineering that highlights just how much detail went into making those 8-bit systems function at all.
If you love diving deep into the nuts and bolts of retro tech, Nicole’s full breakdown is a must-read. It’s a fascinating look at the hidden complexities behind the games we grew up playing. Check out her post for the full technical scoop—you’ll never look at a CRT the same way again.