GNAT/RTEMS pc386 - BIOS functions

[Chris Johns]

Chris Caudle wrote:
> 
> >===== Original Message From Alejandro Villanueva <190921 at cepsz.unizar.es>
> =====
> >Thanks Chris, but... how do I get back to real mode?
> 
> That I don't remember.  You'll have to dig into the Intel manuals for that,
> but I usually stay away from it.  You will probably have to save your current
> register state, and restore it when you come back.  Jumping back and forth
> between real and protected mode is pretty messy.
> 

I have no idea if this will work as I do not use the i386 port, but have
a look at the etherboot project on source forge :

 http://etherboot.sourceforge.net/
 
Unpack the project and look for `_real_to_prot' and `_prot_to_real' in
`src/start32.S'.

-- 
 Chris Johns, mailto:cjohns at cybertec.com.au mailto:ccj at acm.org