FYI y'all:

Syntax of the "boot" command is

	boot [device-spec] [arguments]

The key is the device-spec, which looks like this for a (fake) SCSI disk:

	/pci/mac-io/mesh/disk@3,0:1,\etc\netbsd

using the full path, it would be SCSI ID 3, LUN 0, partition 1,
file "/etc/netbsd".  Several parts of this are optional.  For instance,
I boot my G3/266 with:

	boot scsi/sd@1:0

SCSI ID 1, partition 0, no filename.  Question: does ofwboot really
put its stuff in part 0, or is this some sort of dummy spec?

On my b&w, I can boot from the internal IDE disk with:

	boot hd:5,\netbsd

which is partition 5 on the internal hard drive (hd is a devalias) and
the file is on the root level of the disk.  (The first four partitions
are for the driver, patch partition, and I forget what else...)

I have not played with the arguments (yet ;-> )

-dgl-

--- begin forwarded text


Date: Mon, 11 Oct 1999 17:19:44 -0700 (PDT)
From: Bill Studenmund <wrstuden@nas.nasa.gov>
To: andy <andy@softbook.com>
cc: port-macppc@netbsd.org
Subject: Re: OF questions-
MIME-Version: 1.0
Sender: port-macppc-owner@netbsd.org

On Mon, 11 Oct 1999, andy wrote:

> I see.I kinda figured out @0 but with :0 I'm still in the fog:
>  Does it mean the physical block number zero?
> What if my boot code lives at some offset? 
> Can I say sd@<scsi ID>:<offset from block zero> - or something like that?

No, it means partition in the on-disk disklabel, whatever form it might
take. :-)

Look at usr/src/sys/arch/macppc/stand/installboot to see how the ofwboot
booter gets shoved onto the disk. Note that this method got broken with
revision 3 firmware (the imac & later). They only boot from a file on a
filesystem.

Take care,

Bill

--- end forwarded text