Today, I started the test. How do you say it? The content is not a lot, only involving the BIOS content, the content is not a lot, but he is not written, even if you review it. The previous choice should not be too big, and the rest is only filled with questions and question and answer questions. The two big heads are still difficult, and they will not say it in this place. .
The difference between BIOS and CMOS. This problem, now I can only answer my own understanding, first CMOS is a readable RAM chip on the motherboard to save the hardware configuration of the current system and the setting of certain parameters, by the motherboard. The battery is powered, even if the system is powered down, the information will not be lost. The CMOS itself is just a memory, only the data protection function, and the settings of the parameters in CMOS are specifically procedures. Most manufacturers now make CMOS setups into the BIOS chip, and the process of booting into the CMOS setup, so the CMOS setup program is called BIOS settings, simple understanding is: BIOS is the means of completion parameter settings CMOS is a storage place for system parameters. The second question is how to protect the BIOS from damage. This problem is now, I can't answer, maybe I can't guarantee the correctness of the answer, I understand this: BIOS is not damaged, there are two aspects of content, namely artificial and non-human (computer virus) destruction. For artificial destruction, it can only protect the safety of the main chassis. Don't make people easily turn on the motherboard, contact the motherboard, set the password into the BIOS in the BIOS settings to prevent others into the BIOS and make changes to the BIOS. For non-human damage, the viral protection is opened in the BIOS settings to prevent information warnings when information is written to the BIOS. The third problem brief introduction to the method of clearing the BIOS password. If the BIOS is modified by the password, how to clear the BIOS password has also begun to become the key, of course, I can't tell the various methods listed in it, just the theoretical breakdown. method. The first is the DEBUG method, the specific practice is to modify the data between 70, 71. The specific practice is as follows: When boot, enter the DOS operating system, enter the debug command, enter, O 70 10, Enter, input O 71 01 Car, enter Q and exit, re-enter the BIOS, password clear. The second method COPY method, generates an executable file with a machine code to clear the BIOS password, this method, you need to enter several sets of machine code data, it can be broken. The third method is to use the universal password. Many motherboard manufacturers have started to provide some universal passwords for BIOS when producing BIOS chips, that is, in the forgetting BIOS password, enter the BIOS and modify its parameters. The fourth method is also the more CMOS discharge method we use, and use the jumper method to discharge CMOS, clear the BIOS password. The fifth method is also the removal of the battery discharge method. The sixth is changing the hardware configuration method. The BIOS password is cleared by changing hardware, that is, when we change the system's hardware environment, the BIOS is loaded when the BIOS is loaded, so we can enter the BIOS to set it, and the password set. Just clear it. Seventh manual discharge method, use short-circuit method to discharge CMOS, this place should pay attention to the time of discharge, to prevent short-circuit of other circuits and burn the motherboard. The eighth method is the software cracking method. Bios passwords were cracked using specialized crack software. The above eight methods are not every kind of effective, sometimes when a situation cannot be solved, we should consider additional methods to clear. The fourth question: What preparations should be done before upgrading BIOS. BIOS upgrade, I haven't done it in myself, and I can only master it from theory.
First of all, it is also a matter of time, determine if the motherboard BIOS can be upgraded, this BIOS chip must be the Flash ROM chip; the second step, determine the manufacturer and model of the motherboard and the version number of the BIOS, this place has a few The method can resolve, you can view the box and motherboard manual, see the label on the motherboard, check the year boot screen, use the test software, on the website. The third step is to find a BIOS brush table tool. The BIOS refresh tool is to erase the BIOS tool software, which is the necessary program software used to update the BIOS, which can be self-contained in the motherboard disc, or the BIOS erasing program provided by the website. Do this, you have to download the BIOS upgrade file. The fifth step BIOS and jumper settings. a. Turning off the main board Auto Antivirus related settings B Turn off a cache and mirror function C confirming whether the motherboard has a BIOS to prevent write. Sixth, make a boot disk for backup. When will the fifth question set in BIOS? When I replied this question, I wrote a lot, although I just think it is correct. It is still written in the book. When a new computer assembly is successful, it should be set. Well, I also answer this. When some devices are added, the computer does not certainly understand, because the device does not have a PNP plug and play function, the user must manually set, the CMOS data is accidentally lost, the BIOS's backup battery is powered down, clear the CMOS parameter or BIOS should be set up in the case of certain viruses. Well, look at it is almost. There is also when installing the system, if you don't start from the CD, you must set it. Ok, it's so much.
