I also tried applying the suggested patch and recompiled.  The machine
still hangs as it usually does - almost seems nothing has changed. 
(though I'm still happy that I finally got a kernel to compile in some
way or another! yay!)

Now I reaally need a transceiver+ethernet hub... My 3100 is now netless :(

Excerpts from internet.computing.netbsd.port-pmax: 28-Mar-97 1.2D kernel
and 3100 hangs. by Steven E Lumos@guitar-sh 
> We tried it here, got exactly the same hang in the same way.  We (an
> ACM Student Chapter at UNLV), are more than willing to try debugging
> the kernel, test strange kernels, etc but we are extremely new to BSD
> (I've built 3 NetBSD kernels, but I don't really know what I'm doing),
> so it would be nice if somebody can help us get started.