Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750930AbVLHJWm (ORCPT ); Thu, 8 Dec 2005 04:22:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750933AbVLHJWm (ORCPT ); Thu, 8 Dec 2005 04:22:42 -0500 Received: from nproxy.gmail.com ([64.233.182.205]:5832 "EHLO nproxy.gmail.com") by vger.kernel.org with ESMTP id S1750921AbVLHJWl convert rfc822-to-8bit (ORCPT ); Thu, 8 Dec 2005 04:22:41 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=IAzDTypWRgPo0JJ6/+0aTeCiymqeDQSZoHXgLSFT5pRTUco9W4QS1xVPuTnmRR4WEA1UgZNL9XG/X7asch2wtVyvD5JZT9U1byqGq7DCO06GkI8FDaf2B1yetG/N4OPm/yOH5WeTy4/8mht0z7nusBEaWmCtERKcRHqq+8g4kH8= Message-ID: <2cd57c900512080122s74c2f9v@mail.gmail.com> Date: Thu, 8 Dec 2005 17:22:40 +0800 From: Coywolf Qi Hunt To: yen Subject: Re: IRQ vector assignment for system call exception Cc: linux-kernel@vger.kernel.org In-Reply-To: <20051208080435.M54890@eos.cs.nthu.edu.tw> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Disposition: inline References: <20051208080435.M54890@eos.cs.nthu.edu.tw> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 552 Lines: 16 2005/12/8, yen : > Hi: > I have a quwstion. Why the number 128 is reserver for system call exception in > interrupt vectors? Why not other numbers? Are there any historical reasons? > thanks. > 0x80 stands in the middle of [0..0xff]. -- Coywolf Qi Hunt http://sosdg.org/~coywolf/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/