The change is only effective for Apple Ethernet LC Card(DRSW=1,DRHW=0x10f).
I'm not sure whether Asante will work or not, sorry.

I saved 1.4.1 kernel modified by same patches as current  on
http://www.sam.hi-ho.ne.jp/ishizaka/netbsd-etherLC.tar.gz

It seems that in current code (if_ae_nubus.c and if_sn_nubus.c)
with nic which has nubus-id drsw==1 (now except drhw==0x10f) 
both 8390 driver (ae) and SONIC driver (sn) are attached .

| This is already fixed in NetBSD-current.  Ken'ichi Ishizaka submitted a
| change that was committed to the source about 8 months ago. Unfortunately,
| it didn't find its way into NetBSD-1.4.2 as it should have.  I have
| requested that it be included in any future releases from in the 1.4.x
| line.
| 
| --scott

--
Ken'ichi Ishizaka