buttersoft wrote:
Gunstar wrote:
This would be great for using with the mister. I suppose you'd need to disable C-Sync if it's generating its own.
Correct, it won't take C-sync as input, only H-sync and V-sync. But it works fine with MiSTer like that. In fact, when i was having trouble locating working HDMI-to-VGA dongles, i did manage to find one that would work ok at 15kHz but only with separate sync - so using this adapter worked great in that case

Hi Buttersoft, love your work.
Hi y'all, this is my first post on shmups so please be gentle with me.
I have been using one of butter's 15khz dongles (thanks very much!) and I am very impressed, it is very neat and adaptable.
Regarding composite sync INPUT to that dongle: assuming uses XNOR logic for sync (I think it does) I believe the trick to getting it to work properly is to pull the unused V sync line (pin 14) to logic HIGH when taking composite sync input via H sync line (pin 13). You might be able to do that via editing the PIC so that it detects composite sync, but you could also do it by adding a simple switch (connect Vsync to your dongle circuit's Vcc input line).
I know this because I've just had to solve this exact same problem for the GreenAntz RGB/VGA to component transcoder - so I could use it with your dongle! Now in addition to RGBHV, GreenAntz now be used with RGBs inputs. This means GreenAntz will work with a wide range of VGA adapter dongles (DVI-VGA, DP-VGA, HDMI-VGA etc) that only pass composite sync (RGBs).
In other news, a SCART version of GreenAntz available soon. I see there is a SCART to component thread active here, so will probably pop in there soon to announce myself as well.
More info about GreenAntz RGB/VGA/SCART to component transcoder is available at forum.arcadecontrols.com
http://forum.arcadecontrols.com/index.p ... 245.0.html