> From: Paul Kranenburg <pk@cs.few.eur.nl>
> Date: Mon, 10 Mar 1997 22:42:36 +0100 (MET)

> > This looks like it's due to a change that has netbsd now no longer
> > insert the sun magic number from the second stage boot program.
> > Someone else encountered this recently while trying to netboot;
> > the program that gets tftp'd across needs to be fixed up with:
> > 
> >     (echo -n 01 | tr 01 '\01\03'; tail +3c boot ) >fixedboot
> > 
> > to give it a magic number that the Sparc boot proms will understand.
> 
> There's still a "helper" script (`/usr/mdec/binstall') that might be
> inspected (or even run, but there's no guarantee on foreign tftp hosts)
> for guide-lines.
> 
> It currently has:
> 
>         cp /usr/mdec/boot tempfile
>         printf '\01\03\01\07\060\200\0\07' | dd of=$TARGET bs=32 conv=sync
>         dd if=tempfile of=$TARGET bs=32 skip=1 seek=1
> 
> which should produce an image that is acceptable to both sun4 and sun4[cm]
> ROMs.  (See installboot.c for an explanation of the numbers..)
> 
> -pk

Would it be possible to do the "magic number frob" at build time?
Does the frobbing depend on the target machine type?

Gordon