@gaetan The sound glitches were the most noticeable. It was a weird crackling. Sadly I only have three DC games on the system (Souldcalibur, MvC2 and Virtua Tennis). VT had graphic glitched on both settings and MvC2 produced blank vertical lines through the sprites when they moved to the right side of the screen in CEA. It was a weird effect (and only on some sprites... A wild guess is that they used textures over flat 3D models instead of sprite hardware here, but that's really just speculation.
@voljega I thought of that. And I think they are good. I did get Pinball Dreams to boot as an adf on the 1200, so I'm thinking there might be some other issue going on.
here's a link to the launch attempts with several games.
@Pepe, I just turned off my firewall and it's working. Thanks for all the help, I now know a lot more about how this thing works. Hopefully I can help someone else in the future. 🙂