From owner-freebsd-hackers  Sun Apr 30 00:02:39 1995
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Date: Sun, 30 Apr 1995 17:00:30 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199504300700.RAA17135@godzilla.zeta.org.au>
To: freebsd-hackers@FreeBSD.org, root@ns2.redline.ru
Subject: Re: please update /dev/MAKEDEV
Sender: hackers-owner@FreeBSD.org
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>Subject: please update /dev/MAKEDEV

>+ mach-4)
>+ 	mknod iopl c 22 0
>+ 	mknod kbd c 23 0
>+ 	mknod mouse c 24 0
>+ 	mknod time c 25 0
>+ 	mknod timezone c 26 0
>+ 	;;

This can't be done.  It conflicts with FreeBSD's devices:

22: fd
23: bpf
24: pca
25: va
26: spkr

In general, foreign device numbers will always conflict or not work.

Bruce