Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!umix!b-tech!zeeff
From: zeeff@b-tech.UUCP (Jon Zeeff)
Newsgroups: comp.sys.ibm.pc
Subject: Re: AT-386 Clone Peeve
Message-ID: <4595@b-tech.UUCP>
Date: 6 Jul 88 13:33:28 GMT
References:  <414@dsinc.UUCP>
Reply-To: zeeff@b-tech.UUCP (Jon Zeeff)
Organization: Branch Technology Ann Arbor, MI
Lines: 18

I've found that the AMI bios does have a different checksum method, 
but if you simply change the number of sectors in one entry and make 
up for it in the next one, it doesn't create a problem.  I needed RLL 
support, so I changed the number of sectors for one entry from 17 to 
26.  I changed the next entry from 17 to 8.  Note that this also means 
you only have to modify/burn one chip.  

Completely changing an entry (numbers of head, cyls, etc) doesn't 
work.  

Please let me know if you find the location (or a byte pattern) of the 
checksum code.  



-- 
Jon Zeeff           		Branch Technology,
uunet!umix!b-tech!zeeff  	zeeff%b-tech.uucp@umix.cc.umich.edu