I bought myself one of these out of curiosity for what it claims to do, which is essentially a DIY version of the XRGB upscaler for 1/4 of the price that converts a non VGA compatible RGB signal (CGA/EGA) to a VGA signal.
I’ve wired up a Euro RGB scart block to one of these, via the 8-pin VGA input header - wiring the RGB lines, sync/composite line and ground. So far - picture quality is insanely impressive than the Hori Upscan Converter 2, being a native RGB picture - and I’m quite certain from the corner of my eye, there’s 1 frame less of input lag on the CGA to VGA converter.
There’s only one HUGE problem stopping me from selling off my Hori adapter. When the game has to output lots of bright colours, especially white - the video signal loses sync, and the whole screen becomes a mess. But when it outputs a picture with not many bright colours - the video signal is completely stable. (I will post up a YT video demonstrating the problem).
I was wondering if anyone (more specfically supergun builders) has bought anything similar to this, and if so - if they have found a way to get rid of this annoying screen jumping problem.
Update: Problem can be seen here - [media=youtube]5DcvsYf0H8s&feature=player_embedded[/media]
Left screen is using a Hori Upscan Converter (S-Video), and the right screen is using the CGA/EGA adapter. (Video quality cannot describe how much better the CGA/EGA adapter is).