how to reset cmos(using dos prompt)

*Usually we reset the " cmos" by shorting out the pins of our mother board. Theres another way to do it.By using the ever useful "dos prompt". But why do we reset "cmos".They say its a way of clearing out settings,passwords,viruses(if there is such).But for me its the ease of resetting the "cmos" without opening the case.


On DOS(if you dont know how to get to DOS. Just hit on start,go to run and type CMD)
Type in debug after the blinking cursor.
After typing debug you will get "-" which is were you can begin by typing A and pressing enter.

A
MOV AX,0
MOV AX,CX
OUT 70,AL
MOV AX,0
OUT 71,AL
INC CX
CMP CX,100
JB 103
INT 20
Note: Nothing is typed on this line
G
By pressing G this will execute the above script,
ensure you have read and agree to the above disclaimer.
Q

Then reboot and you will get a Setup Checksum Error.
Go into setup, correct all the incorrect values, time, date...

*source some others page.. :)
*I hold no responsibility if something did go wrong after doing this routine
*youve been warned, so enjoy