Hello
I'm using the same controller and I might be able to assist.
The attached PDF file is all the documentation I received / I could find online.
The board seems to use a custom protocol - not TCP/IP based, I can see the MAC of the controller board.
The current control software is ~ a pain - i need to keep a specific windows 10 virtual machine to run it.
There's no linux support.
I've been thinking for some time to rip it out and replace it with a MESA 7i96S or something similar.
If you think there might be any interest in this controller, please point me to a list of thing to prepare - protocol capture via wireshark / data dumps between the CPU and the ethernet controller, etc.