From owner-freebsd-current@FreeBSD.ORG Sun Jul 27 21:09:32 2003 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D220E37B401; Sun, 27 Jul 2003 21:09:32 -0700 (PDT) Received: from wantadilla.lemis.com (wantadilla.lemis.com [192.109.197.80]) by mx1.FreeBSD.org (Postfix) with ESMTP id 484FF43F93; Sun, 27 Jul 2003 21:09:31 -0700 (PDT) (envelope-from grog@lemis.com) Received: by wantadilla.lemis.com (Postfix, from userid 1004) id 24421526FC; Mon, 28 Jul 2003 13:39:29 +0930 (CST) Date: Mon, 28 Jul 2003 13:39:29 +0930 From: Greg 'groggy' Lehey To: "M. Warner Losh" Message-ID: <20030728040929.GS45069@wantadilla.lemis.com> References: <20030728032653.GA37499@wantadilla.lemis.com> <20030727.214235.20045695.imp@bsdimp.com> <20030728040157.GP45069@wantadilla.lemis.com> <20030727.220357.65159779.imp@bsdimp.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="nk27jClX7wGPY2hW" Content-Disposition: inline In-Reply-To: <20030727.220357.65159779.imp@bsdimp.com> User-Agent: Mutt/1.4i Organization: The FreeBSD Project Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 WWW-Home-Page: http://www.FreeBSD.org/ X-PGP-Fingerprint: 9A1B 8202 BCCE B846 F92F 09AC 22E6 F290 507A 4223 cc: FreeBSD-current@FreeBSD.org cc: freebsd-mobile@FreeBSD.org Subject: Re: Mapping Video BIOS? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 Jul 2003 04:09:33 -0000 --nk27jClX7wGPY2hW Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Sunday, 27 July 2003 at 22:03:57 -0600, M. Warner Losh wrote: > In message: <20030728040157.GP45069@wantadilla.lemis.com> > "Greg 'groggy' Lehey" writes: >> Sure. The data at offset 0xc0000 are: >> >> C000:0000 55 AA 78 E9 44 06 00 00-00 00 00 00 00 00 00 00 U.x.D........... >> >> The 0xaa55 is the BIOS signature ("Here be a BIOS"), and the 0x78 is >> the length byte (120 sectors, or 60 kB). That's how orm0 knows the >> end address. >> >>> I don't think that it suggests that things are 'unmapped'... >> >> If the area between 0xcc000 and 0xcffff had been mapped, orm0 would >> have found this too: >> >> C000:F000 55 AA 08 E8 6D 0B CB 11-FE 02 00 00 00 00 00 00 U...m........... > > 08 -> 4k Correct. It should have shown a BIOS from 0xcf000 to 0xcffff > It could also be that there's a bug in orm that's missing it... Sure, but given the other indications, that's not so likely. Greg -- See complete headers for address and phone numbers --nk27jClX7wGPY2hW Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.0 (FreeBSD) iD8DBQE/JKH5IubykFB6QiMRAjbFAJ9Pszbb8t0qo6qYS9SbG9gj7YD6kQCgn/5o GSpP5Hcd4BUa021v4rBlmg4= =h94r -----END PGP SIGNATURE----- --nk27jClX7wGPY2hW--