🚀 go-pugleaf

bbb1s@kelvin.seas.Virginia.EDU (Bibhuti Bhusan Banerjee) writes:


>I recently bought a 486-33 clone, and was playing around with the
>BIOS Setup Program yesterday -- it can be accessed by pressing
>the Delete key when booting up the PC. The "Advanced CMOS Setup"
>routine under the BIOS Setup Program has a "Password Checking Option."
>The options provided are disabled/setup/always. I changed the
>setting from "disabled" to "setup" and typed in a password at the
>time. Yesterday, I wanted to go into the BIOS Setup Program again,
>and of course, I had forgotten the correct password. I tried 
>different plausible possibilities, but none worked. Does any expert
>on the net know how to find the lost password, or how I may enter
>the BIOS with default settings and correct this situation? I do have
>a listing of the BIOS settings, but would prefer not to disconnect
>the battery to reset the BIOS. 


The following information should help you out.  Note the following disclaimers
first:
a) This will wipe out your entire cmos/xcmos memory and you'll need to reset
it.  Make sure you know what your hard drive types are (at a minimum)
b) This only works if you can boot the computer.  Since the password is
only on the setup program, you probably can.
c) About the only thing this won't wipe out is the time/date so be careful!

With either GWBasic or QuickBasic write the following program, then run it:

10 for x=&h10 to &h3F 
20 out &h70,x
30 out &h71,0
40 next x

This will kill everything in cmos except the time/date.  If you happen
to have a Chips and Technologies chipset replace the &h3F with &h7F.


-Gil

gil@mrcnext.cso.uiuc.edu