From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:42916) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S05VW-0006Fa-P2 for qemu-devel@nongnu.org; Wed, 22 Feb 2012 01:16:55 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1S05VV-0004qJ-ET for qemu-devel@nongnu.org; Wed, 22 Feb 2012 01:16:54 -0500 Received: from e28smtp07.in.ibm.com ([122.248.162.7]:50681) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S05VU-0004oj-LN for qemu-devel@nongnu.org; Wed, 22 Feb 2012 01:16:53 -0500 Received: from /spool/local by e28smtp07.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 22 Feb 2012 11:46:43 +0530 Received: from d28av02.in.ibm.com (d28av02.in.ibm.com [9.184.220.64]) by d28relay05.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q1M6GeaS716952 for ; Wed, 22 Feb 2012 11:46:41 +0530 Received: from d28av02.in.ibm.com (loopback [127.0.0.1]) by d28av02.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q1M6Gd7d025294 for ; Wed, 22 Feb 2012 17:16:40 +1100 Message-ID: <4F448845.4080306@linux.vnet.ibm.com> Date: Wed, 22 Feb 2012 14:16:37 +0800 From: Zhi Hui Li MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] Help me about the FDC List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: QEMU-devel , Stefan Hajnoczi Cc: zhihuili@cn.ibm.com I am read the code of fdc.c , I feel it was difficult to understand. Can somebody give me some help: thank you very much! 1: explain the difference between : type_register_static(&isa_fdc_info); type_register_static(&sysbus_fdc_info); type_register_static(&sun4m_fdc_info); 2: explain the struct of FDCtrl; 3: or give me some introduce of FDC.