[coreboot] User interface on coreboot

[Lap Ngo Doan]

Hi all,
As you may know, when we enter to BIOS, we can use the keyboard to change
some settings such as : enable/disable something, change boot devices
priority ....It is kind of user interface on BIOS.
In the coreboot website, they said "*coreboot* is a Free Software project
aimed at *replacing the proprietary**BIOS*
http://wikipedia.org/wiki/BIOS (firmware)
found in most computers..."
If we want to add some interactions with hardware like BIOS firmware
provided us (use keyboard to enable/disable some options....),  how could
we do it with coreboot?
Thank you!