From owner-freebsd-hackers  Wed Jan  3 01:20:44 1996
Return-Path: owner-hackers
Received: (from root@localhost)
          by freefall.freebsd.org (8.7.3/8.7.3) id BAA23687
          for hackers-outgoing; Wed, 3 Jan 1996 01:20:44 -0800 (PST)
Received: from seagull.rtd.com (root@seagull.rtd.com [198.102.68.2])
          by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id BAA23678
          for <freebsd-hackers@freefall.FreeBSD.org>; Wed, 3 Jan 1996 01:20:36 -0800 (PST)
Received: (from dgy@localhost) by seagull.rtd.com (8.6.12/8.6.12) id CAA24493 for freebsd-hackers@freefall.cdrom.com; Wed, 3 Jan 1996 02:20:33 -0700
From: Don Yuniskis <dgy@rtd.com>
Message-Id: <199601030920.CAA24493@seagull.rtd.com>
Subject: POST checksum hacking
To: freebsd-hackers@freefall.FreeBSD.org (FreeBSD hackers)
Date: Wed, 3 Jan 1996 02:20:33 -0700 (MST)
X-Mailer: ELM [version 2.4 PL24]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-hackers@FreeBSD.ORG
Precedence: bulk

Greetings!
   I have a few older (read: ancient!) Compaq systems I'd like to
put FBSD on.  Unfortunately, Compaq (in their infinite wisdom -- NOT!)
have fixed disk parameter tables in their BIOS.  So, regardless of
the size of the (IDE) disk I might install, I am limited to
whatever geometry Compaq has chosen to support.
   I'd like to cut a new set of EPROMs with an altered disk table
but the POST screams about bad checksums.  Anyone have a clue as
to the algorithm employed and the location of the checksum image
(before I start disassembling code)?
   Thx,
--don