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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!stanford.edu!kronos.arc.nasa.gov!iscnvx!news
- From: kevin@dipl.rdd.lmsc.lockheed.com (Kevin Anderson)
- Subject: Re: AMI BIOS Password - Answer!
- Message-ID: <1992Aug26.211247.20042@iscnvx.lmsc.lockheed.com>
- Summary: xxx
- Keywords: xxx
- Sender: news@iscnvx.lmsc.lockheed.com (News)
- Reply-To: kevin@dipl.rdd.lmsc.lockheed.com
- Organization: Sun Microsystems, Inc.
- References: <edd151s.714843187@nella1.cc.monash.edu.au>
- Date: Wed, 26 Aug 92 21:12:47 GMT
- Lines: 27
-
- >>kevin@dipl.rdd.lmsc.lockheed.com (Kevin Anderson) writes:
- >>The other way is to zap the password directly in cmos
- >>memory. The cmos is located at i/o port addresses 70h and 71h. There are 64
- >>bytes in cmos memory. Write the address to port 70h, and read/write registers
- >>at port 71h. For example, to read address 20h in the cmos, write 20h to address
- >>70h, then read address 71h. The password occupies six bytes from 38h to 3dh.
- >>The addresses 3eh, 3fh, and possibly 37h are used in decoding the password,
- >>but I don't know how.
-
- >>Kevin Anderson
-
- > So, if you have forgotten your password, how exactly can you read/write to
- > anything when you're staring at a PASSWORD: prompt????!!
-
- > Ivan Rayner
-
- You can change/zap/read/write/whatever the password if the password checking
- option is off in the BIOS setup. This is useful is you've forgot your
- password, but don't have the password checking option on. It's
- also useful if you want to change the password on somebody elses machine
- (who don't happen to have their password checking option on). I wouldn't
- recommend doing this, however, as it might be dangerous to your health.
-
- Kevin Anderson
-
-
-
-