Method and apparatus for preventing BIOS from failing to...

Details Method and apparatus for preventing BIOS from failing to... Method and apparatus for preventing BIOS from failing to...

2009-04-17

2011-11-15

Du, Thuan (Department: 2116)

Electrical computers and digital processing systems: support

Digital data processing system initialization or configuration

Loading initialization program

C713S001000, C711S202000, C714S053000

Reexamination Certificate

active

08060737

ABSTRACT:
A method and an apparatus for preventing a basic input/output system (BIOS) from failing to enter a boot program are adapted to solve the problem that when a central processing unit (CPU) executes a first instruction after a computer is powered on, a start address to be executed is erroneously set as another corresponding start address, resulting in that a BIOS cannot enter a boot program. In the method of the present invention, a jump instruction is written to the corresponding start address, so as to enable an execution instruction to jump to a boot block of the BIOS when the start address is erroneously set in the computer, thus performing a normal boot operation. Moreover, in the present invention, a step for checking a register that may cause the start address to be inverted to the corresponding start address is further added to the BIOS program, such that in each boot process, the value of the register can be pre-checked and overwritten when an error occurs, so as to avoid the problem of false pointing next time the computer is booted.

REFERENCES:
patent: 5355498 (1994-10-01), Provino et al.
patent: 5522076 (1996-05-01), Dewa et al.
patent: 5799186 (1998-08-01), Compton
patent: 7822965 (2010-10-01), Li et al.

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