Complex sentence: A payload called SeaBIOS can be used to provide BIOS calls and thus allow coreboot to load operating systems that require those services, however most modern operating systems access hardware in another manner and only use BIOS calls during early initialization and as a fallback mechanism.
Split into simpler sentences: A payload called SeaBIOS can be used to provide BIOS calls and thus allow coreboot to load operating systems that require those services. However, most modern operating systems, access hardware in another manner and only use BIOS calls during early initialization and as a fallback mechanism.