I noticed that there is a card info tool in the cnet.device download, and that freezes when I try and use it. It even says "If the system freezes, remove the card" as though it is expected.
If card_info causes a system lockup too, stop wasting your time in configuring the TCP/IP stacks. The problem lies elsewhere.
I'd rather not mess about soldering on the amiga motherboard - I will ruin my computer. The card reset tool should be a software alternative, shouldn't it?
That's right. You don't need to do any soldering.
Is there anything else I can try?
There are many different "flavors" of the cnet.device in the archive. Try all of them.
Remove any patches from your startup-sequence.
If this fails, try an older version of cnet.device.
>> >> , consider buying another compatible card. Perhaps the one you have is just faulty...
>> >> , >> >> >> PSU.
>> >> , >> >> >> motherboard or fix any timing issues of your current motherboard in case your CPU is 68040+. (Use the search function of the forum for more info about this)
I bet some of these suggestions will solve the problem.