| 摘要 |
A computer system with a dual boot-program area, comprises: a processing unit; a BIOS ROM having a primary boot-program area, a secondary boot-program area, and a BIOS main-code area, wherein a first code is both stored at a first address of the primary boot-program area and a second address of the secondary boot-program area; and a BIOS-switching circuit, connected to the BIOS ROM, further comprising a detecting circuit and an address-switching circuit. The detecting circuit can control the address-switching circuit to be operated in an enable mode or a disable mode. A command, issued from the processing unit and for retrieving the first code, is sent to the first address after a power button of the computer system is pressed if the address-switching circuit is operated in the disable mode; or, the command is sent to the second address if the address-switching circuit is operated in the enable mode.
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