Open KaixeRho opened 2 years ago
Hi all! I am the developer behind C2C. Just wanted to say hi, and participate in the discussion so we can try to find a way for interfacing C2C and GBS-control. In this regard, I would need to understand the sync signals that gbs-control expects and figure out a way to output them from C2C. If you have any documentation in this regard please share it here.
C2C uses the ADV7391/ADV7393 series of encoders for generating component/rgb signals. The datasheet is available here. There are some options for configuring sync signals, but it's not extremelly flexible. Hopefully we can make it work.
Cheers
Hey, the amplitude on the ASIC sync input pins should be between 0.7Vpp and 3.3Vpp. Sync failure is more about the not fully reverse engineered sync extractor / sync window settings, than any other thing. Csyncs work better than separate syncs.
How's it going. To keep this as brief as possible: I was interested in getting composite and SVideo functionality working on the GBS-Control. The only transcoder for this was the Koryuu, but as seen in this thread from a while ago. I don't believe this issue was resolved.
I stumbled across the GitHub for the C2C-64 , and after much discussion with the lead dev, I was able to get my hands on a copy of the board. I was informed that the sync timings are identical to the Koryuu - if the Koryuu had sync detection failure issues, the C2C64 (basically a stripped down and minimalist version of the former) would likely have the same exact issues. Sure enough, it does have those issues. The image quality is excellent from source -> C2C -> GBSC, but the image is constantly shutting off after every frame.
I'm not sure if it was a joke, but Rama remarked that a Koryuu model would need to be sent over to actually solve this issue. I really want to offer to do exactly that. I would love to send over my C2C-64. With both it and the GBS-C being open source, cheaper, DIY alternatives to things like the OSSC or the Koryuu, I think building compatibility between the two could only be a boon for this entire space.
I understand that Rama specifically is busy with XStation, but I think if possible this might be worth pursuing, even if it takes a good amount of time.