>> Is there a way to force a NIC driver onto a NIC that is unknown to
>> OpenBSD?
>>
>> I ask this question because I have a USB Ethernet adapter that returns a
>> vendor/device ID unknown to OpenBSD but it's linux driver source shows
>> it is based on Davicom DM9601.
>>
>
> I think you should be able to do this with mknod().

Nonsense. First, ethernet interfaces do not have any device nodes in
/dev since the socket API does not need them; second, whatever device
node you'll create will still end up in the driver corresponding to its
major number, and if it can not cope with your hardware, this will not
change anything.