[Ilugc] How to display hello in a PC without bootstraploader and OS???!!!

Karishma Balan karishma.balan at gmail.com
Mon Jul 9 00:10:33 IST 2012


Thanks a lot.
The link is very helpful and inspiring.

On Sun, Jul 8, 2012 at 11:36 PM, Krishna <foss at codelectron.com> wrote:

> On Sun, Jul 8, 2012 at 7:15 PM, Karishma Balan <karishma.balan at gmail.com
> >wrote:
>
> > Please answer my doubt..
> > Suppose your PC do not have any OS installed.(It has bootstrap loader).
> > Then,
> > 1.  What will happen as an when you turn ON the system? Will it display
> > anything?
> > 2.  How to print a hello on monitor without any OS?
> > 3. How to use computer or operate anything without any OS? If no OS is
> > there, then what does it use for user interface?
> >
> > What is the case for above questions when there is no bootstrap loader
> > also.
> >
> In case of X86,
> The bootstrap loader will load whatever is there in the first sector  of
> HDD, or Floppy or USB drive (based on the order in which it will boot up)
> And verify for a signature if a valid bootloader is present. if present it
> loads the bootloader and pass the control to it.
>
> This one http://www.osdever.net/  has plenty of information about
> bootloader, kernel, etc for OS development.
>
> Hope that helps.
>
> -Krishna
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