CN1091903C - Method for completely preventing viruses of CIH, etc. from damaging computer master control panel BIOS - Google Patents

Abstract

The present invention relates to a method for completely preventing viruses of CIH, etc. from damaging a computer main board BIOS. A metal core of a 31 pin of an IC socket of a 32 core is extracted; the BIOS chip on the main board is extracted; the gap is correspondingly inserted into a special socket processed by the method; then, the special socket is inserted to the position of the original BIOS chip on the main board, and accordingly, 'reading-writing' (invalidation) is suspended, and the present invention can thoroughly prevent the viruses of CIH, etc. from damaging BIOS chip data. If the BIOS chip software needs to be upgraded, the special socket can be extracted, and the original BIOS chip is directly inserted to the original socket of the main board. Accordingly, on the basis that the method does not reform the existing main board and does not affect the upgrade of the BIOS chip software, the present invention can practically protect the BIOS chip, and all of viruses, such as CIH, etc., are away from the main board cabinet.

Description

Prevent the method for virus damage computer motherboard BIOS such as CIH

The present invention relates to the method for virus damage computer motherboard BIOS such as a kind of CIH of preventing, particularly a kind of available hardware is stopped the method for virus damage computer motherboard BIOS such as CIH.And existing mainboard is not done any change, do not influenced the upgrading of BIOS chip normal software yet.

Current, malignant virus CIH has brought enormous economic loss to the destruction of computer motherboard to various circles of society.It is to wipe the some byte critical datas in the BIOS chip on the mainboard to the mechanism that mainboard destroys, and solidified POST (POWER ON SELF TEST in the BIOS chip, Power-On Self-Test) several starts such as guide necessary key procedure module, thereby start blank screen after damaging, the phenomenon that can't guide.And along with further popularizing of computer utility, various computer viruses also emerge in an endless stream, and constantly to intelligent, strong destructiveness even make aspect development such as computer hardware inefficacy, make us hard to guard against." CIH can destroy computer motherboard " (selecting from the emergency notice of the strick precaution virus CIH that China Ministry of Public Security that on September 1st, 1998, the Chinese Chinese Central Television (CCTV) broadcast sends the previous day in news hookup); The still big outbreak of CIH on April 26th, 1999 is that bellwether's numerous computing machine manufacturer all releases the service of " freely changing impaired mainboard for the user " afterwards with the association; The compatible user of numerous assemblings then be thrown into a panic by the time ... so be badly in need of the product (method) that the easy protection of a kind of economical and practical, powerful operation again of development BIOS chip is rewritten arbitrarily.The present invention provides strong technical guarantee for the appearance of this product.

Can further analyze: why virus be rewritten the BIOS chip? mainly be that the FLASH chip that employing can electric be wiped replaces former EPROM chip because computer motherboard manufacturer is for the ease of carrying out software upgrading to BIOS.To rewrite and to wipe with ultraviolet light it earlier an EPROM chip that has write data, so virus can not be destroyed the data in the EPROM, and to rewrite (comprising that data erase and data write) to a FLASH chip as long as chip satisfies and writes voltage, corresponding " write and enable " signal is effective, and the relevant software instruction of execution gets final product.

For various computer motherboards in the market, the read-write voltage of BIOS chip is all identical basically (all is+5V), (do not read+5V, write+12V) and do not resemble early stage BIOS chip read-write voltage difference.So for destroying the virus of BIOS data, two in the above-mentioned condition have been out of question, write voltage unquestionable (can read just can write), carry out the related software instruction be out of question (the BIOS chip generally all adopts several models commonly used＜mainly be price factor on the market 〉, as long as thereby find the DATABOOK of these chips, promptly know with which kind of software instruction to its program erase and write).Like this, as long as Last corresponding " write and the enable " signal that allows exactly is effective, virus just can have been done at will." write and enable " signal of general mainboard BIOS chip is default all to be invalid, could the corresponding triple gate of gatings make the BIOS chip " write and enable " signal becoming effectively by write some specific data to specific I O port.Unfortunately, these are former should to be that a secret particular port and data no longer have been secret, so just CIH can occur.

Therefore the object of the present invention is to provide virus damage computer motherboard BIOS such as a kind of CIH of preventing, need not do any change, also not influence the method for BIOS chip normal software upgrading existing mainboard again.

In order to realize the present invention's above-mentioned purpose, method provided by the present invention comprises the following steps:

(1) " writing and enable " signal from the BIOS chip starts with, though virus can be instructed by some special software and be allowed BIOS on the mainboard " write and enable " signal effectively to destroy, but finally this signal still will be delivered on the respective pins of BIOS chip and just can work, " write and enable " signal pins of BIOS chip commonly used all is identical (the 31st pin at present fortunately, general BIOS chip is totally 32 pin), as long as so make the directly contact of the 31st pin discord mainboard of BIOS chip, do not influence normal read operations like this, just isolated writing and erase operation chip;

(2) with metal-cored the pulling out of the 31st pin of one 32 core IC socket, then the BIOS chip on the mainboard is pulled up, breach inserts relatively through the private jack after this method processing;

(3) with the position (breach is relative) of original BIOS chip on this private jack insertion mainboard, can really prevent viral destructions such as CIH like this from hardware point of view to the BIOS chip data;

(4) if the user need carry out software upgrading to the BIOS chip, as long as temporarily private jack is taken out, original BIOS chip is directly turned back on the original socket of mainboard, can carry out software upgrading;

(5) inserting private jack after software upgrading is finished again again gets final product.

Above method is not being carried out the hardware circuit transformation to the active computer mainboard, does not change yet and destroys on the basis of existing BIOS chip, can protect computer motherboard BIOS chip practically.Can make mainboard refuse all malignant viruses such as CIH in thousands of miles away.

Specific embodiment:

Provide embodiment (this instantiation system explains purposes, is not limitation of the present invention) below in conjunction with accompanying drawing.

Fig. 1 is the diagram of one embodiment of the present of invention.As shown in Figure 1, metal-cored the pulling out with nose pliers with 32 core IC bases the 31st pin gets final product.

The above only is a specific embodiment of the present invention, and thought of the present invention is not limited thereto, and anyly is familiar with this technology person in the field of the invention, and the variation of being implemented or revise all is comprised in this patent scope.

Claims (1)

1. method that prevents virus damage computer motherboard BIOS such as CIH, this method may further comprise the steps:

(1) virus makes BIOS chip on the computer motherboard " write and enable " signal by special software instruction effectively to rewrite interior data and destroy, but finally this signal respective pins that still will deliver to the BIOS chip just can work, as long as make the directly contact of the 31st pin discord mainboard of BIOS chip, do not influence normal read operations like this, just isolated writing and erase operation chip;

(2) with metal-cored the pulling out of the 31st pin of 32 core IC sockets, then the BIOS chip on the mainboard is pulled up, breach inserts relatively through the private jack after this method processing;

(3) this private jack breach is inserted relatively on the mainboard position of original BIOS chip, can really prevent the destruction of virus such as CIH from hardware point of view to the BIOS chip data;

(4) if the user need carry out software upgrading to the BIOS chip, as long as temporarily private jack is taken out, original BIOS chip is directly turned back on the original socket of mainboard, can carry out software upgrading;

(5) insert private jack after software upgrading is finished again again.

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