Option ROM - Standard IBM PC BIOS - BIOS Boot Specification

BIOS Boot Specification

Since these two methods don't offer a large amount of control over the boot process, the BIOS Boot Specification (BBS) was developed. This provided a more standardized approach where an option ROM could be initialized at the start of the boot process, it could inform the BIOS about its functionality, and then it could be called later on in the boot process depending on the order the user had selected.

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Other articles related to "bios boot specification, boots, bios, boot":

BIOS Boot Specification
... If the expansion ROM wishes to change the way the system boots (such as from a network device or a SCSI adapter for which the BIOS has no driver code), it ... ROMs have registered using the BBS APIs, the user can select among the available boot options from within the BIOS's user interface ... This is why most BBS compliant PC BIOS implementations will not allow the user to enter the BIOS's user interface until the expansion ROMs have finished executing and registering themselves ...

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