Sure, it can share e.g. IOMD code ... but that can be done via
   sys/dev/acorn/iomd/... or something.  See how the sparc and sparc64
   ports share Sbus device drivers (sys/dev/sbus).


and also generic `sun' devices, with the sun3 por as well in
sys/dev/sun.  see also sys/dev/dec and sys/dev/tc.


sys/dev/acorn sounds good to me.


.mrg.