Build Your Own Arcade Controls Forum

Software Support => GroovyMAME => Topic started by: CRTFTW on November 22, 2025, 06:17:36 pm

Title: Composite Sync in CRT Emudriver: is it working for you, and what is your setup?
Post by: CRTFTW on November 22, 2025, 06:17:36 pm

So what is everybody's setup regarding C-sync? Are you combining it physically in some way, or you using software C-sync? Furthermore, what GPU, and what OS? What sort of problems did you encounter on the way?

I ask because I'm setting up another computer with Emudriver and hitting a snag.

This is with a PVM 1953MD, GPU is r5 430. PC is a Dell with i3 7100 running Windows 11 25H2.

I've had success with Windows 11 in the past, but maybe something has changed in the interim. I understand Win 11 isn't officially supported, to the degree any of this is official.

Anyway, I can bodge composite sync by just using a T-connector and it works, and both H and V sync need to be negative.

I flipped on software composite sync, only left H-sync plugged in, and I got a stable picture for a few seconds that faded to black. Like it getting too much voltage or maybe not enough? Very odd. Perhaps it needs a 470ohm resistor? Though in my understanding, a lot of PVM's are quite tolerant of different sync voltages.

Also, this contrasts with my experience with software C-sync in the past on a 20L2 where I used ++ polarity, and it worked seamlessly.

So yeah, I'd like to simplify things and just use software c-sync, but I'm not sure if/how it's possible.