Write-protection system and method thereof

A write-protection method, comprising:

• programming head command programs and tail command programs of a basic input output system program to control a voltage level of a write protection pin;
• running the head command programs when the basic input output system program is initializing, to generate a first command signal to set the voltage level of the write protection pin into high to allow status registers and a basic input output system chip into a writable mode to write data according to the first command signal;
• updating and programming application programs of the basic input output system program built in the basic input output system chip to perform corresponding functions;
• and
• running the tail command programs when the basic input output system program is initializing, to generate a second command signal to set the write protection pin into low to make the status registers into a write protection mode according to the second command signal to protect the data in the basic input output system chip.

A write-protection system used in a computer system, comprising:

• a basic input output system chip providing basic input output system program including different command programs, the basic input output system chip comprising a write protection pin and status registers;
• and
• a main control chip electrically connected to the basic input output system chip, the main control chip comprising a low enabled general purpose input output pin, wherein the general purpose input output pin is electrically connected to the write protection pin of the basic input output system chip, when the basic input output system program is initializing, a voltage level of the general purpose input output pin is controlled by performing the different command programs of the basic input output system program, and when the general purpose input output pin is high, the write protection pin is disabled, the status registers and the basic input output system chip are in writable modes;
• when the general purpose input output pin is low, the write protection pin is enabled, the status registers and the basic input output system chip are in write protection modes.