This is similar to the Vince Briel version of the card, but supposedly with some additional capabilities.
A couple of things I've noticed about the card compared to the Briel version. The resistor layout on this one is designed for 1/8 watt resistors instead of the much more common 1/4 watt ones. If I don't want to buy 1/8 watt resistors it will make the assembled boards look kinda ugly. The shape looks kind of cool, but there really isn't much utility to it. The Briel version's placement of the VGA connector at the top of the card actually is probably better, especially if the card is being used with a VGA->HDMI converter because it allows more space. Not cutting the fancy shape would probably save money if you were mass producing these boards, although it didn't seem to make much difference at JLCPCB for the 5 quantity I had made. I think a simpler rectangluar shape with the VGA connector at the top like the Briel version would have allowed a simpler, less crowded design and spacing of components that would have made 1/4 resistors easy to fit. Anyway... I don't want to come off as negative... I am definitely looking to see how the additional features of this board, apparently allowed by the additional PLD chip, a GAL 22V10 allows. I also need to dig into the source code for both this version and the earlier version that the Briel board uses to see how these additional featured are implemented. I am really curious about what the GAL 22V10 does to allow some of the things like the Z80 card emulation and also supposedly 80 column card emulation on a ][+ type system (the main thing I'm interested in). Z80 card emulation is interesting also of course.