Method and apparatus for updating and restoring system BIOS func

Details Method and apparatus for updating and restoring system BIOS func Method and apparatus for updating and restoring system BIOS func

1991-05-29

1995-02-07

Shaw, Gareth D.

Excavating

371 111, 3642221, 3642663, 3642802, 3642803, 3642809, G06F 906, G06F 924

Patent

active

053882679

ABSTRACT:
A computer which carries its BIOS in a Flash EPROM. A UV-EPROM carries a redundant BIOS, which can be overlaid onto the BIOS address space by selection with a physical switch.
The BIOS contains a small core software program, at the BIOS entry point, which checks BIOS integrity, and provides for reloading the Flash EPROM's BIOS if needed (from a floppy disk, or by copying the entire contents of the UV-EPROM).

REFERENCES:
patent: 5022077 (1991-06-01), Bealkowski et al.
patent: 5136713 (1992-08-01), Bealkowski et al.
patent: 5210875 (1993-05-01), Bealkowski et al.
Glass, Brent; "The IBM PC BIOS"; Byte, 1989, Apr.; pp. 303-310.
Bingham, Douglas; "Achieving Flexable Firmware"; 1978 MIDCON Technical Papers; 20/3/pp.1-4, 1978.

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