Raspberry PI4, MESA 7I96S problems

Cant do this anymore bye all wrote:

I was always under the impression that up to version 3 the ethernet was on the USB bus and 4 and after were on the PCIe bus.

Me too !

Yes I had forgotten, its the RPI3 that uses USB --> Ethernet
I should know since I have run a Mesa Ethernet card from a RPI4.

 (I think some RPI4 --> Ethernet motion card users needed to increase
the servo thread period to 2 ms to get it to run reliably)