Looks like you need to be using boot.mac not ofwboot
going by gwk's oldworld article:
INSTALL.macppc should really document the purpose of boot.mac...
On Mon, Mar 09, 2009 at 04:27:27AM -0700, J.C. Roberts wrote:
> According to INSTALL.macppc, page 5 (yes, I printed it), "PowerMac G3
> Beige status is unknown.
> This won't be the case for long...
> >From what I've read, normal booting to the CD is just not supported. To
> be specific, booting to the CD requires a boot loader off of the hard
> drive according to the claims I've read. The Open Firmware (rev 2.4)
> seems to support this claim since using `devalias` shows no CD, and
> using the typical boot-holding-C only spins up the CDROM drive, without
> actually booting to it.
> Attempting to netboot fails
> > boot enet:,ofwboot /bsd.rd
> > boot enet:,ofwboot /bsd.rd BOOTP failed
> unable to open: enet:,ofwboot
> It does light up the 10base LED on the switch, but that's about it.
> The tftpd server is set up and works fine (tested via IP and tftp(1)
> from another box). I even tried using a cross-over cable but the mac
> still refuses to play nice.
> This leaves me a few choices (raw writing):
> 1.) the hard drive
> 2.) the zip drive
> 3.) the floppy drive
> I created a ffs formated floppy, copied the ofwboot file onto it and
> tried to see if the firmware would read it.
> > boot fd:,ofwboot
> But without a kernel small enough to fit on the floppy, I'm stuffed.
> J.C. Roberts