Thank youHi, welcome to A-P
There's a wait list, I'll add you, thanks!
I tried moving the jumper on the CSync Processor to 'unbuffered' (see photo) and between this, and finally updating the firmware on my OSSC to the most recent version after being stuck on a legacy version since I picked it up, I was able to get things working flawlessly!The HAS V3.0 that you've got allows for some tinkering with the sync, but it doesn't change the actual frequency. The OSSC just line doubles the signal, so if the monitor doesn't like the doubled CPS2 frequency, you might be out of luck :/
An upscaler with frame buffering might do the trick.
It wasn't a matter of the DVI cable, as the OSSC was already outputting a proper signal frequency, but the HAS wasn't sending a compatible sync signal to the OSSC to begin with.The DVI output of the OSSC supports digital only, ie you can't use a passive VGA adapter/cable it will not work.The best scaler for this task is actually the Taito one (that's part of the JAMMA kit) as it only outputs 640x480 VGA (31khz).DVI-to-VGA cable to 31k Nanao MS-2932 (Sega Naomi high res only) monitor
I tried with the second unit new I bought....same result.Looks like that PS2 controller adapter is broken, I suggest you contact the seller.
As for the UD USB you can try reaching out to @undamned, he's the creator of this amazing adapter, and it works flawlessly with the HAS.
THAT -- for me is late (i use already that retro-access cable)Woohoo!! Especially for EU customers, lots easier than that retro-access store from the US