> [...EBUSY...chrtoblk...]
> Next bug: I was reading entry #61 of the table, whereas there are
> only 59 entries on macppc.

I found this the hard way myself, once.  Now, one of the things I do
when I start playing with a port is to do something like this to
chrtoblk (this is extracted directly from my private patch for
sys/arch/sparc/sparc/conf.c):

@@ -429,6 +461,8 @@
 {
        int blkmaj;
 
+       if ((sizeof(chrtoblktbl)/sizeof(chrtoblktbl[0])) < nchrdev)
+               panic("chrtoblktbl too small for cdevsw");
        if (major(dev) >= nchrdev)
                return (NODEV);
        blkmaj = chrtoblktbl[major(dev)];

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