I hope it wasn't Asante. I have a box full of NuBus 10/100 cards in the attic which I bought on Ebay from what appeared to be an Asante ID liquidating "Refurbished" stock. I tried to use one in a PM8100/110 with a NewerTech G3 and OS 8.mumble or maybe 9.something and it didn't work.
This left me wondering if the driver for the card works past 7.6.1 but I was actually trying to use it to move files to an MDD, so I gave up on the ethernet card at that point and moved on to other matters.
One of these days I'll take up the 10/100 ethernet cards as a topic, and I hope I don't find that they're defective...