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AMI password backdoor?

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Peter Bako

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Nov 22, 1995, 3:00:00 AM11/22/95
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I recently purchased a computer at an auction with an Opti chipset/AMI
bios motherboard. Unfortunately the a**hole who had the system before
set a password on the BIOS. I have heard that there is a backdoor
password for the AMI bios, but I do not know what it is.

If you know the AMI password, or _any_ method by which to wipe out the
current password on the bios, then I would be eternally greateful.

Peter

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Jim Armstrong

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Nov 29, 1995, 3:00:00 AM11/29/95
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Jesper de Jong <jes...@sunspot.et.tudelft.nl> wrote:

>On Wed, 22 Nov 1995, Peter Bako wrote:
>
>> I recently purchased a computer at an auction with an Opti chipset/AMI
>> bios motherboard. Unfortunately the a**hole who had the system before
>> set a password on the BIOS. I have heard that there is a backdoor
>> password for the AMI bios, but I do not know what it is.
>>
>> If you know the AMI password, or _any_ method by which to wipe out the
>> current password on the bios, then I would be eternally greateful.
>
>Wiping it out is easy: Look in the manual of the motherboard for a jumper - - -cut - - If there is no CMOS reset
>jumper, take out the battery, leave it out for some time and reinsert it.
>
>A better solution is to use a program like AMISETUP to crack the
>password. I don't know exactly where you can get this program, maybe at a
>Simtel mirror site.
>
Look at the ami survival guide, it may help:
http://www.dfw.net/~sdw/bios31.html
--
Jim Armstrong <jm...@erinet.com>
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PO Box 2025
Fairborn, OH 45324

Jesper de Jong

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Nov 29, 1995, 3:00:00 AM11/29/95
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On Wed, 22 Nov 1995, Peter Bako wrote:

> I recently purchased a computer at an auction with an Opti chipset/AMI
> bios motherboard. Unfortunately the a**hole who had the system before
> set a password on the BIOS. I have heard that there is a backdoor
> password for the AMI bios, but I do not know what it is.
>
> If you know the AMI password, or _any_ method by which to wipe out the
> current password on the bios, then I would be eternally greateful.

Wiping it out is easy: Look in the manual of the motherboard for a jumper

to erase the contents of CMOS memory. Use this. Ofcourse, you will loose
the configuration data in the CMOS memory too, this means you will have
to set harddisk parameters etc. yourself. If there is no CMOS reset

jumper, take out the battery, leave it out for some time and reinsert it.

This will also wipe out the contents of CMOS memory.

A better solution is to use a program like AMISETUP to crack the
password. I don't know exactly where you can get this program, maybe at a
Simtel mirror site.

Regards, Jesper.

-------------------------------------------------
Jesper de Jong <jes...@cas.et.tudelft.nl>
-------------------------------------------------

Thomas Welp

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Dec 6, 1995, 3:00:00 AM12/6/95
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Just open your computer (make sure technical data of the harddisk is
known to you)
Try CTRL-ALT-INS. Otherwise unhook the battery from the mainboard, the
CMOS will be wiped and the computer is accessible again

Thomas


Maurice Lin

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Dec 6, 1995, 3:00:00 AM12/6/95
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Thomas Welp (s3...@mailserv.uni-giessen.de) wrote:
: Just open your computer (make sure technical data of the harddisk is
: known to you)
: Try CTRL-ALT-INS. Otherwise unhook the battery from the mainboard, the
: CMOS will be wiped and the computer is accessible again


FYI, in AMI bios dated after 1992, at the password prompt type 'ami'.

This will work for all ami bios IF the jumper switch is not disabled.
Please do not flame me. It is better to try the backdoor than opening up
the case and screwing up something else.

Maurice Lin

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David Hollyhead

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Dec 8, 1995, 3:00:00 AM12/8/95
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phr...@gwis2.circ.gwu.edu (Maurice Lin) wrote:

>Thomas Welp (s3...@mailserv.uni-giessen.de) wrote:
>: Just open your computer (make sure technical data of the harddisk is
>: known to you)
>: Try CTRL-ALT-INS. Otherwise unhook the battery from the mainboard, the
>: CMOS will be wiped and the computer is accessible again


>FYI, in AMI bios dated after 1992, at the password prompt type 'ami'.

>This will work for all ami bios IF the jumper switch is not disabled.
>Please do not flame me. It is better to try the backdoor than opening up
>the case and screwing up something else.

>Maurice Lin


I fully agree, "If it ain't broke don't fix it!"


I had a similar problem with a customers machine and I didn't want to
take the covers off if I could avoid it. I tried this password and
it didn't work for me even with a BIOS dated 1992 so I got hold of
AMISETUP which I found in AMIS2990.ZIP in the Simtel MSDos archives.


(I think the full address was
//www.coast.net/cgi_bin/Simtel/msdos/sysutil/


David Hollyhead


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