We help IT Professionals succeed at work.

Please kill my Bios

ICVR asked
Medium Priority
Last Modified: 2010-04-26
Even an expert needs help sometimes.
I have a 1993 Gateway HandBook.. It has a  removal battery pack and an internal battery which is soldered in.
 there are no jumpers near the bios nor the battery Or anywhere as a matter of  fact. With as many computers as I have worked on in the past this is a first  for me.  I remove the internal battery for over 30 days and a bios still retained  its original information. Might I add that I had installed a password, now forgotten.  This puts me in a predicament. I intended to give it to a neighbor boy for some help around  my house.
this little portable is not worth more than 50  to 75 dollars.  Gateway tells me the only way to clear the password is to send it in for repair.................   BUNK!!   It will  cost  me more than the computer is worth, then to have them fix it.
If  Gateway can clear the bios so can I.  I just lacked the knowledge that they have.
This is what it has:
8680 CPU.(80286 like)........SCAT Bios....Whatever that is, ........two TC518512FTL-80(512X8) rams
Shoot..... I am beginning to thinking that it may even have  bubble memory of some sort. There is one chip that has 16 pins and some small parts coverd patly by a plate.?????
Well, there you go.  Can you find a solution to my problem?
 Thanks......  ICVR
Watch Question


Edited text of question


Adjusted points to 180
From memory the old computers didn't have CMOS discharge jumpers.  All you need is a piece of wire and wrap that around one of the IC Chip for a few minutes to discharge the CMOS.  You can try get a strip of wire, wrap it around every chip for a few minutes (make sure all pins of the chip are in contact with the wire).  Hope that will work.

If it was a design where discharge jumpers are far away from the bios then there's a little trick you can perform

While the computer is off
For all 2 pins without jumpers put a jumper in for several mins then remove it.
For all 3 pins jumpers move the jumper to the other position for several mins then move it back.
Repeat with all jumpers.  And the bios should be cleared.
Against all logic, there seems to be a bios upgrade for this machine.  


Perhaps upgrading the bios will automatically reset the settings, since there appears to be no way to clear the cmos. If you can get the bios out, you might be able to burn the new one in with an eprom burner.

You may want to try KillCmos . It has worked for me numerous times and it was never necessary to remove the case.


Hope this helps,

try to over write the bios with an older version then rewrite with the actual or if it possible a newer version of the bios.
Hello, a file from the site ( http://www.knoflach.com/uha1/ ) called BIOS.zip has many bios cracking programs. It causes the bios to return to it's default state. If that will not work and considering the value of the unit itself you can always try to short out the bios chip itself under power, I have done this on some 286's and 386's with excellent results. May sound bad, but at the cost of the board, it's worth it.

Discharge the soldered-in internal battery using a resistor or flashlight bulb.
Now we need some feedback from you.

Some of the machines use a EEPROM for BIOS settings. Ain't no battery required. There are also low power CMOS RAM's where the battery is built in to the IC package. (Look for an "extra thick"  .6" wide IC...)

He already told us that the machine has "....an internal battery which is soldered in."

Any luck yet, ICVR?

                 Hi  there !!!!!
It's really easy !!!
Try to assemble and link this prog...
model small
assume cs:@code,ds:@data
             out 71h,al ; Thats all !!!!!
             mov ax,4C00h
             int    21h
stack 200h
end start

Start this prog..and reboot your system, then wait the message "
Press F1 to..."

If you can't make this prog...then write mess to me with your email adress and i send that prog to you....

That is REALLY coders method !!!
 Sorry for my english....

With best WISHES -=SubZero=- aka WiZard


Thanks for the great help friends.   So far, no luck.  I had tried everything but, Shorting out the ICs while the power is on,  This I think I will hold off for the final attempt.
As for using any programs to change the bios, the password comes up even before the memory begins counting.  So injecting code  is out all the question.(LOL)
Its seams that the direction I'm looking at is with  Mark2150  above.
There's not much of a reference on the  Internet for SCAT  bios, so if you know anything about them ......  So let's say that the chip has a battery of a sort on board.  Without destroying the chip,  the best away to short out the chip would be  what?  I have tried shorting all leads on the chips with the power off, ( I'm afraid  that some of  the on-board resisters may not take a liking to the power of being on).
     Well I think we are on the right track.  I see I am not aloan  with this problem,  judging  by what I have seen on the Gateway news groups.  I will make this outcome definitely public knowledge.
        Any more suggestions is more than welcome.
thanks  ICVR


Adjusted points to 200
if you post your email address i can post a program that has always worked for me in the past when i needed to get around a CMOS password... it creates a checksum error and resets the bios to defaults... it has been used on some desktop 286s that I have used... maybe it wont work but is worth a try. Ignore the fact that it is written for a specific bios... has worked on all i have used it on...

so post your email address and i will send it to you

I thought you said it had "....an internal battery which is soldered in."

I didn't mean short out IC when power is on, I mean when power is off...
You see CMOS is suppose to be running even when main power is off.  So shorting it out discharges its memory.

I don't think password was, is or ever will be put into the BIOS which in most cases are ROM, EPROM or EEPROM, and cannot be reprogrammed(updated).  286's BIOS would probably be ROM and not erasable without UV.  Therefore your password cannot possibly be there.

Old 286 don't come with CMOS discharge jumper.  So your only choice is to short out the power supply pins that feed into the CMOS memory chip.  That's what I mean wrap a piece of naked wire around it for a few minutes.  If the chip has internal battery that would be killed too.

How about throwing it away and giving the kid 50 dollars?
Unlock this solution and get a sample of our free trial.
(No credit card required)

If you have a re-chargable CMOS back-up battery soldered onto the board, it IS easy.
Just take a couple of alligator clip-leads and connect a flashlight bulb across the back-up battery's terminals.
Come back tomorrow and the CMOS will have reverted to default values.

rmarotta, he has mentioned that the internal battery has been removed for 30 days and still couldnt get it erased...

Nope, that was the laptop's battery-power source.
I'm speaking of a soldered-in, CMOS back-up battery.

rmarrota, and he also said "there are no jumpers near the bios nor the battery Or anywhere as a matter of  fact"...

What does that have to do with killing the CMOS battery?
(using a load connected to the battery's solder terminals with some clip leads)

I believe he has looked around for the CMOS battery yet couldnt find it.


Your viewpoint seems to fall along the same line as to what to I have expected.
The disk drive is external,  and as fast as the password pops up I don't think the drive would be able to inject a program.  So using software seems to the out of the question.
It is to my opinion that the reason why Gateway requires the unit  returned to them, is so they may remove the expanded memory chip And install a ROM with a sub program that reset's the bios.
But yet there should still be a way to get around this............. perhaps not.
I have set one last final email to Gateway technical support giving reference to getting his car fixed at a price over the value of the car.  Perhaps this will at the verry least get a response  to what HE must do to remove the password.  If and when he does reply, and gives me a reasonable answer, I'll let you know
But if any one could configure out how to defeat the CMOS ROM I'll appreciate it.
And as for  dumbscotty the boy wishes a computer, if I gave him 50 bucks I'm sure he would not have long, or his parents will probably confiscate it.


By the way...... ALL Batteries have been removed

ICVR, I can't fix your problem, but I can fix your little confusion here... The BIOS is something that is nonvolatile, probably in an EPROM.  It cannot get overwritten or disappear because the battery ran out - in fact it is the BIOS code which is giving you the password nightmare right now.

Your problem is coming from the fact that having removed the battery that backed up the CMOS RAM, the contents are random and probably different every power-up.  Unfortunately it is in this RAM that the BIOS stashed its copy of the password.

The engineer dude plans to replace your battery with a new one, pull out your SCAT (ha!) BIOS EPROM, and stick in a custom EPROM instead.  This custom ass-saving EPROM simply zeros the CMOS RAM and halts.  Then he plans to swap your normal BIOS EPROM back in, and bingo, no more password.


Well I think that is about it .......
Thanks all of you for your input
Unlock the solution to this question.
Thanks for using Experts Exchange.

Please provide your email to receive a sample view!

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.


Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.