Electrical computers and digital data processing systems: input/ – Input/output data processing
Patent
1998-08-13
2000-05-09
Ray, Gopal C.
Electrical computers and digital data processing systems: input/
Input/output data processing
713 2, 709301, G06F 900, G06F 9445, G06F 1310, G06F 1200
Patent
active
060617454
ABSTRACT:
A boot sequence adapted for use with a computer system during execution of system BIOS. The computer system includes a random access memory (RAM), a selected number of controllers. Each of the controllers reside in a respective expansion slot (e.g., PCI slot), have at least one drive associated therewith, and have an option read only memory (Option ROM) that includes a BIOS initialization code and a runtime code. The boot sequence includes: (a) ascertaining the number of controllers residing in the expansion slots; (b) executing the BIOS initialization code associated with a first one of the controllers to create within the RAM an initial drives' structure (IDS) corresponding to the controllers; (c) suppressing the Option ROM of all but the first one of the controllers; (d) building a PNP linked list according to predefined boot priority by the user (e) building within the RAM a global drives' structure (GDS) corresponding to a pre-defined boot sequence priority that designates a selected one of the controllers as a boot controller, and the GDS is in the form of a listing of drives each having an addressable location within the readable memory; and (f) booting from an entry pointer in the GDS to execute the runtime code for the boot controller having a highest user selected priority.
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Adaptec, Inc.
Ray Gopal C.
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