[LinuxBIOS] 1. Re: USB floppy boot (Peter Stuge)
myles at pel.cs.byu.edu
Mon Dec 10 18:03:03 CET 2007
On Dec 9, 2007 11:25 PM, Baski <kbaski at yahoo.com> wrote:
> On Sun, Dec 09, 2007 at 12:26:21AM -0800, Baski wrote:
> > I have a tiny kernel (not linux) and GRUB in a floppy disk. How can
> > I make it to boot using linuxbios?
> A few things need to be considered:
> * How does the kernel try to find the system information that is
> usually exported by the BIOS in quite old-fashioned ways?
> At a minimum, the kernel needs to know how much memory is in the
> system. LB does not offer the same methods as a BIOS to learn this.
> * Does the kernel use other BIOS interrupt services? LB does not
> offer any.
> * How large is your kernel?
> If it can fit with LB in the boot flash (which is between 256kb and
> 1MB) you don't need the floppy at all.
> The kernel in experiment is very tiny in nascent stage, about 50KB, and has
> only one functionality, printing out to serial port in loop. Can I just put
> it in the flash instead of FILO? Pl. advise.
Sure. The easiest way is to make your kernel into an elf, then use it
as the payload for LinuxBIOS.
More information about the coreboot