There is no password, since there is a password, then we want to unlock it or restore it into a default ... If you set a CMOS password and forget, or other colleagues in the unit set the CMOS password and didn't tell You, but you really want to enter the BIOS program for settings and modifications, there is no password that is difficult. However, there is no road to the sky, since there is a password, then we think that it is a way to unlock or restore it into a default. In addition to "opening the chassis discharge to clear the BIOS settings", there are many ways to decrypt and restore CMOS, and I will give you a presentation. The general password reserved by the manufacturer is for a hastily, manufacturers reserved some universal passwords in their own chips, which are useful for some motherboards, but they are not useful for all motherboards. For example, now the motherboard uses Award's BIOS system. The author mainly introduces you Award's universal password: 1.dirrid; 2.ebbb; 3.h996; 4.wantgirl; 5.589589; 6.award; 7.syxz. (Note: 4.50 BIOS is effective below). If your motherboard is the BIOS system of other manufacturers, you can consult the manufacturer or to find the universal BIOS password reserved on the Internet. When these universal passwords you have tried, but you can't unknow the CMOS password, it may be that the motherboard manufacturer has modified the BIOS program, which is difficult to do not fall, please see the following method. In general, the CMOS setting of the computer can be accessed and changed by two ports of 70h and 71h, the easiest way to clear all of them, that is, the default setting. The following block is to clear the CMOS data with the debug command. Debug is an external command of DOS, you can find it in the Windows / Command directory, start the computer to the MS-DOS environment, enter Debug under the DOS prompt symbol and Enter, the procedure is as follows: C: / DOS> Debug -o 70 21 -o 71 20 -q or: C: / DOS> Debug -o 70 10 -o 70 01 -q Note: "-" is the system It has appeared in itself, so you don't need to enter. Restart the system, then the system will tell you that the CMOS parameter is lost, asking you to reset the CMOS parameter. Press the DEL key to enter CMOS, you can set it. It should be noted that CMOS has become default settings. If you want to restore the original settings, you need to manually perform the settings of certain parameters.
In fact, you can also crack through the Basic language. If you have a Basic software on your hand, you can easily calculate the CMOS's password! The method is simple, just do the following procedure: Color 10, 5 Dim A (9) CLS Print Space $ (980); Tab (22); "The Password for Zhe BIOS:"; OUT & H70, 28 P = INP (& H71) OUT & H70, 29 q = INP (& H71) x = 16 ^ 2 * q p color 30, 5 i = 0: j = 0: n = 0 y = x i * 65535 z = int (3 * y / (4 ^ (n 1) -1))))))) IF z <= 126 THEN 190 N = N 1 IF n <8 THEN 140 i = i 1: j = 0: n = 0 = 16 ^ 2 * q P: goto 130 if z <32 THEN 180 A (j) = z: j = j 1: a = yz * 4 ^ n if a = 0 THEN 230 n = n-1: y = A: goto 140 for K = 0 to J Print CHR $ (a (k)); Next Color 10, 5 End Of course, discharge the CMOS battery can also be more convenient to complete the decryption and recovery operation of the BIOS password. This method of discharging CMOS battery needs to open the chassis and find a CMOS battery to discharge it. In fact, most of the motherboards are set up with jumpers or DIP switches for CMOS battery discharge, and we will follow the main board manual. If your motherboard is the old motherboard, there is no CMOS battery discharge jumper or DIP switch, or you can't find the motherboard manual at all. Don't know which group is a CMOS battery discharge jumper, then you simply pull the CMOS battery, will Its positive and negative is shorted or put on an hour or so (that is, let CMOS have no electrical energy supply for a long time, let it automatically clear the content). Since this method needs to have certain hardware knowledge, it is recommended that friends who don't understand should not do it easily. If you want to do it, you can find a friend who knows a little hardware knowledge. Changing Hardware Configuration When the microcomputer is started, the cured BIOS program first checks if the machine's hardware configuration is consistent with the parameters set in the CMOS. When there is conflict or inconsistency, it will automatically enter the setup setup after power on, without entering a password. With this principle, we can turn on the chassis and change a hardware configuration to achieve the effect of automatically clearing the password. The steps are as follows: (1) Turn on the chassis, change the original configuration of the machine, such as disconnecting the sound card or the floppy drive data line. (2) Restart the computer, after the machine automatically enters the Setup program, you can reset the CMOS password. (3) After resetting the CMOS password, press F10 to save the settings, restart the machine to make the settings take effect. Software Dafa will easily clear the CMOS password by means of software (such as PCTools and Norton).
Below two simple examples: 1. Bootsafe (Bootsafe.ex can be found in PCTools 9.0) Run Bootsafe C: / M, back up the CMOS information and boot information to the blank floppy disk, form cMos.cps and cboot.cps Two text files, then use the editor such as Edit to modify some content, start up with this disk, run Bootsafe C: / R, run Bootsafe C: / R, and the system will ask if the CMOS data (answer yes) from the floppy disk (answer YES) Whether to restore the partition table data from the floppy disk (answer no), finally restart, at this time, all content in the CMOS has been cleared. 2.Rescue (Rescue) is found in Norton 8.0 to make an emergency disk with Norton's Rescue function, and use the editor such as Edit to arbitrarily modify the contents of the CMOS.DAT file in the emergency disk. . Run RESCUE.EXE in the emergency disk, select one of the CMOS Information (CMOS Infomation) in Item To Restore, restart after completion, can also achieve the purpose. 3. BiospWDS (can be downloaded in major software stations) BIOPWDS can make you easily know the BIOS password. It is also quite simple to use. After running this tool, there will be the use interface of the BIOSPWDS tool. Simply press "Get Passwords" on the interface, and then put the BIOS information on the BIOSPWDS interface, including the two or three seconds. : BIOS version, BIOS date, use password, etc., you can easily know the BIOS password. Ascii Dafa If you don't want to download the software, you don't want to open the chassis, you don't want to change the hardware configuration, the following methods believe that you can help you crack and restore the BIOS password: 1. Enter the MS-DOS environment, enter your Edit and enter the EDIT under the DOS prompt (if you find an error in Edit, you don't have edit.com this file, please see the next method), type: Alt 179 Alt 55 Alt 136 Alt 216 Alt 176 Alt 32 Alt 230 Alt 113 Alt 254 Alt 195 Alt 128 Alt 251 Alt 64 Alt 117 Alt 241 Alt 195 Note: The above data is first pressed the Alt key, then press the numeric keypad (pressing the number button above the keyboard), then release a number, release the ALT key, then press Alt. key. In the operation, a chaotic character will appear on the screen, we don't have to manage it. Then select Save in the File directory, save it as cmos.com, then exit it to the MS-DOS environment, press this file to find the CMOS.com, see if he is 20 bytes, if you don't explain that you are wrong, Re-enter. After confirming, you can clear all the data of the CMOS (of course, including a password) directly.
