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.