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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!munnari.oz.au!bruce.cs.monash.edu.au!monu6!nella1.cc.monash.edu.au!edd151s
- From: edd151s@nella1.cc.monash.edu.au (Mr I.P. Rayner)
- Subject: Re: AMI BIOS Password - Answer!
- Message-ID: <edd151s.714843187@nella1.cc.monash.edu.au>
- Sender: news@monu6.cc.monash.edu.au (Usenet system)
- Organization: Monash University, Melb., Australia.
- References: <g8=n_rn.starkey@netcom.com> <1992Aug25.210414.14132@iscnvx.lmsc.lockheed.com>
- Date: Wed, 26 Aug 1992 15:33:07 GMT
- Lines: 15
-
- 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
-