[Ilugc] How to display hello in a PC without bootstraploader and OS???!!!
- From: foss@xxxxxxxxxxxxxxx (Krishna)
- Date: Sun, 8 Jul 2012 20:06:05 +0200
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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