[coreboot] Coreboot and INT13H

[ron minnich]

On Sat, Jul 22, 2017 at 9:01 AM ingegneriaforense at alice.it <
ingegneriaforense at alice.it> wrote:

> \
> However this allow me to do the following question: in which a way should
> be done the service "Eject Media" that corresponds to INT 13H, AH=46H ? It
> seems to me that this service is executed, for example, when i need to
> eject a usb stick.
>

no, it's not. It's not needed. Linux does not use it for example as far as
I know, and has not for many years.


> Can you confirm this ? and that is Coreboot is indipendent from the kernel
> of a linux OS (in particular the grub 2) ?
>

It always has been, be design. But if grub 2 uses any BIOS services then it
will need seabios there.


>
> 2 - The last question. I don't understand very well the answer of Ron:
> "to expand on patrick's comment, any sort of output in the boot stage of
> coreboot significantly slows boot time. This is not a problem on most
> firmware, but on coreboot it's a big issue.  Even the addition of 100
> milliseconds is a real detriment to boot time".
>
> Why ?
>
>
>
I'm not sure what your "Why?" is about, can you be more specific?

ron
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