From owner-freebsd-questions@FreeBSD.ORG Thu Jun 21 15:38:41 2007 Return-Path: X-Original-To: questions@FreeBSD.org Delivered-To: freebsd-questions@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id A0DDC16A400 for ; Thu, 21 Jun 2007 15:38:41 +0000 (UTC) (envelope-from sai.engrsai@gmail.com) Received: from wa-out-1112.google.com (wa-out-1112.google.com [209.85.146.181]) by mx1.freebsd.org (Postfix) with ESMTP id 7B9D113C45B for ; Thu, 21 Jun 2007 15:38:41 +0000 (UTC) (envelope-from sai.engrsai@gmail.com) Received: by wa-out-1112.google.com with SMTP id j37so374628waf for ; Thu, 21 Jun 2007 08:38:40 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:mime-version:content-type; b=iigFUB6+OvfXwICkhnIBmk2xZjJfXo+svDkEWFCHQ7XU5BJNqcRGkPTmgRRb5acWASAJXPrLKzNtWIF8I8C3xdnIo1h7bEGJxG7MdRu7EK7pT9GQEXJITw3G1JdhvFmUt286M/oqQoS5IWxX7eDHdZbFtoovgunsaizCvbvheoQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:mime-version:content-type; b=UcCrMbjC+lHN8XhRfERjYd2uFOTq3CtmcKgPJ3QyROPV49B3NVPBvs1VaNZvRpIEEiIdKRWNfqXSBnFtEQ8G6+RuPRRYVUuMTWk4uD9HGh8fc9n/jHc5AJc7Sftyc5M4ThBwTzLp+K96xS9bLTi8GO+EOQJnosQ/143gZ+z6Kc0= Received: by 10.114.154.1 with SMTP id b1mr1701985wae.1182438638719; Thu, 21 Jun 2007 08:10:38 -0700 (PDT) Received: by 10.141.209.9 with HTTP; Thu, 21 Jun 2007 08:10:38 -0700 (PDT) Message-ID: <700e45e50706210810w47d14b1fpf02fd6c1f4fed888@mail.gmail.com> Date: Thu, 21 Jun 2007 20:40:38 +0530 From: V.SriSaiGanesh To: questions@FreeBSD.org, doc@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Subject: Doubt on the information provided in freebsd.org website. X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Jun 2007 15:38:41 -0000 Hi All, I was going through the Architecture Handbook(Link: http://www.freebsd.org/doc/en_US.ISO8859-1/books/arch-handbook/boot-bios.html). In this page they have mentioned following phrase "The very last thing in the POST is the INT 0x19 instruction. That instruction reads 512 bytes from the first sector of boot device into the memory at address 0x7c00". AFAIK INT0x19 is a reboot service. So I got confused. Can somebody clarify my doubt on INT0x19 (reboot or bootstraping) Thanks and Regards, SaiGanesh -- ---------------------------------------------------------- "Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." - Brian W. Kernighan --------------------------------------------------------------