[LinuxBIOS] 1. Re: USB floppy boot (Peter Stuge)

Baski kbaski at yahoo.com
Mon Dec 10 07:25:34 CET 2007


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.

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