Mike Chi, creator of the RetroTINK line of products has just uploaded a free design that’s an RGBHV to RGBs sync combiner. This is NOT a 480p VGA to SCART downscaler, just a connector and sync converter!!! Please allow me to explain…
The purpose of this board, is twofold:
- To simply change a connector from dsub to SCART and pass through RGBs (and audio)
- Combine RGBHV to RGBs when necessary
This does NOT change or scale the resolution at all, just the sync, however it could used for a wide variety of things. Some examples would be a simple way to interface the MiSTer’s video output connector and audio to SCART. Another would be using something like a Dreamcast’s VGA signal with 480p-compatible SCART equipment.
Lastly and my favorite use: Anyone converting HDMI “super resolution” 240p from HDMI to VGA can now use this device to connect directly to a SCART setup. Things like a Raspberry Pi or people with a CPSHDMI kit can set the output to 240p and use this with a cheap DAC to get the signal onto their RGB monitor!
Mike’s also working on a version that will convert the signal to S-Video and composite as well as RGB, specifically for the purpose of people wanting those signals from a MiSTer….although any of the above (or other) scenarios should apply as well.
The project is still a concept and currently untested, but I’ll definitely put it through it’s paces when it arrives. My only criticism so far is I feel a SCART plug, rather than a SCART receptacle would have been a better choice, however I think that’s a result of availability; I don’t think any surface-mount SCART plugs are available anywhere.
Here’s the link to the shared project: https://oshpark.com/shared_projects/ckX0JXhf
— Mike Chi (@retrotink2) March 29, 2020
After a few more hours… redesigned now with a composite and S-video encoder as well! Going to try my idea of using the encoder as the sync combiner. Let's see how this goes before I publish the files. Want my composite MiSTer! pic.twitter.com/Kg0dZw2QaM
— Mike Chi (@retrotink2) March 30, 2020