DigestI
If you forget the password to enter the CMOS setup program, in addition to the method of using jumper shorting on the motherboard to clear it, you can also use the software clearing method. The following will introduce how to clear the CMOS password under DOS.
In DOS, there is an editor, which is DEBUG. It is a very practical tool. The startup method is to enter the command DEBUG at the DOS command prompt, and then you can enter the DEBUG editing interface.
After entering the command in the command prompt state, restart the computer to clear the CMOS password. The following are five command lines to clear the CMOS password.
Method one
-o 70 16
-o 71 16
-q
Method two
-o 70 11
-o 71 ff
-q
Method three
-o 70 10
-o 71 10
-q
Method four
-o 70 23
-o 71 34
-q
Method five
o 70 10
-o 71 ff
-q
We used the two numbers 70 and 71 in methods one, two, three, four, and five (as shown in Table 1) because the data access in CMOS is implemented through these two I/O ports 70 and 71. Port 70H is a byte address port, used to set the address of data in CMOS, and port 71H is used to read and write the content of the data unit in the CMOS address set by port 70H.
In addition to the DEBUG method introduced earlier, some tool software can also be used to clear, such as Pctools 5.0, Biospwds.exe and Comspwd.exe, etc. Here they will not be introduced one by one.
In DOS, there is an editor, which is DEBUG. It is a very practical tool. The startup method is to enter the command DEBUG at the DOS command prompt, and then you can enter the DEBUG editing interface.
After entering the command in the command prompt state, restart the computer to clear the CMOS password. The following are five command lines to clear the CMOS password.
Method one
-o 70 16
-o 71 16
-q
Method two
-o 70 11
-o 71 ff
-q
Method three
-o 70 10
-o 71 10
-q
Method four
-o 70 23
-o 71 34
-q
Method five
o 70 10
-o 71 ff
-q
We used the two numbers 70 and 71 in methods one, two, three, four, and five (as shown in Table 1) because the data access in CMOS is implemented through these two I/O ports 70 and 71. Port 70H is a byte address port, used to set the address of data in CMOS, and port 71H is used to read and write the content of the data unit in the CMOS address set by port 70H.
In addition to the DEBUG method introduced earlier, some tool software can also be used to clear, such as Pctools 5.0, Biospwds.exe and Comspwd.exe, etc. Here they will not be introduced one by one.
ko20010214
=================================
大功告成，打个Kiss!
ko20010214@MSN.com
神州优雅Q300C
Intel CeleronM 370处理器 | 256MbDDR内存
40G硬盘 | USB2.0 | IEEE 1394
13.3 ' WXGA 宽屏(16:10) | COMBO光驱
10/100M网卡 | 四合一读卡器
=================================
大功告成，打个Kiss!
ko20010214@MSN.com
神州优雅Q300C
Intel CeleronM 370处理器 | 256MbDDR内存
40G硬盘 | USB2.0 | IEEE 1394
13.3 ' WXGA 宽屏(16:10) | COMBO光驱
10/100M网卡 | 四合一读卡器
