I too have ed_ bus driver split code, patched to -current, for ISA &
PCMCIA attachments, in the pcmcia patch kit.

I am not too happy with the split, there's still a fair amount of
ISA-ness to the "generic" part in the stuff I've done.

See the stuff in the directory
ftp://ftp.netbsd.org/pub/NetBSD/arch/i386/apm+pcmcia/pcmcia-for-current/

for a start.

==John