Re: [Etherboot-developers] [COMMIT] 5.1.2+ boot from disk.

[<ebi...@ln...>]

ke...@us... (Ken Yap) writes:

> >Ok, did more testing. Booted a 5.1.2 (up to CVS) unrelocated compressed
> >image using a 5.0.7 ROM. Menu comes up ok and I can load menus ad
> >infinitum. I can load an ELF bzImage and initrd ok but it stops after
> >loading has finished, probably jumps into hyperspace. I cannot load a
> >tagged FreeDOS image, it complains about the clash in low memory.
> 
> Ok, after the last round of changes, I can now boot a FreeDOS image
> (NBI).  Either Michael's fix or the prezero fix worked. It still can't
> launch an non-multiboot ELF image. I guess the launch code has a bug.

Good. One code path is working.

Do the standard NBI images use a 16bit or a 32bit entry point?

From my testing I am certain xstart32(entry, a, b, c) gets to the
entry point, under LinuxBIOS Multiboot or not.

What I have to narrow down is why ELF images don't work.
I have two possibilities.
A) The stack contents are incorrect.
B) It is an environment issue that doesn't show up under LinuxBIOS.

Either of which are possible, if I knew some of the NBI images used
a 32bit entry point, and how well they worked.  I could deal
with a number of possibilities.

I am going to first examine the stack possibility as that is
the most likely issue.  And the start checking out the environmental
ones.  But first I hope, a test multicast server...

Eric