From PICLIST@MITVMA.MIT.EDU Thu Nov 14 01:20:42 2002 Received: from cherry.ease.lsoft.com [209.119.0.109] by dpmail10.doteasy.com with ESMTP (SMTPD32-7.13) id AAEAD1E008A; Thu, 14 Nov 2002 01:20:42 -0800 Received: from PEAR.EASE.LSOFT.COM (209.119.0.19) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <18.007D26AD@cherry.ease.lsoft.com>; Thu, 14 Nov 2002 4:06:55 -0500 Received: from MITVMA.MIT.EDU by MITVMA.MIT.EDU (LISTSERV-TCP/IP release 1.8d) with spool id 9626 for PICLIST@MITVMA.MIT.EDU; Thu, 14 Nov 2002 02:08:23 -0500 Received: from MITVMA (NJE origin SMTP@MITVMA) by MITVMA.MIT.EDU (LMail V1.2d/1.8d) with BSMTP id 1503; Thu, 14 Nov 2002 02:06:55 -0500 Received: from pd2mo2so.prod.shaw.ca [24.71.223.10] by mitvma.mit.edu (IBM VM SMTP Level 320) via TCP with ESMTP ; Thu, 14 Nov 2002 02:06:49 EST X-Comment: mitvma.mit.edu: Mail was sent by pd2mo2so.prod.shaw.ca Received: from pd3mr1so.prod.shaw.ca (pd3mr1so-ser.prod.shaw.ca [10.0.141.177]) by l-daemon (iPlanet Messaging Server 5.1 HotFix 0.8 (built May 12 2002)) with ESMTP id <0H5K00B0C13C5Y@l-daemon> for PICLIST@MITVMA.MIT.EDU; Thu, 14 Nov 2002 00:06:48 -0700 (MST) Received: from pn2ml10so.prod.shaw.ca (pn2ml10so-qfe0.prod.shaw.ca [10.0.121.80]) by l-daemon (iPlanet Messaging Server 5.1 HotFix 0.8 (built May 12 2002)) with ESMTP id <0H5K00FLC13C8O@l-daemon> for PICLIST@MITVMA.MIT.EDU; Thu, 14 Nov 2002 00:06:48 -0700 (MST) Received: from UALBERTA.ca (h24-79-141-181.ed.shawcable.net [24.79.141.181]) by l-daemon (iPlanet Messaging Server 5.1 HotFix 0.8 (built May 12 2002)) with ESMTP id <0H5K00D8S13A8L@l-daemon> for PICLIST@MITVMA.MIT.EDU; Thu, 14 Nov 2002 00:06:48 -0700 (MST) MIME-version: 1.0 X-Mailer: Mozilla 4.76 [en] (Win98; U) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT X-Accept-Language: en References: <200211140119.gAE1JLF17539@mail010.syd.optusnet.com.au> Message-ID: <3DD34BB9.EDF3D5BA@UALBERTA.ca> Date: Thu, 14 Nov 2002 00:07:37 -0700 Reply-To: pic microcontroller discussion list Sender: pic microcontroller discussion list From: Robert Rolf Organization: U of Alberta Subject: Re: [EE]: Do floppy drives have any errorchecking/correction? To: PICLIST@MITVMA.MIT.EDU X-RCPT-TO: Status: R X-UIDL: 277600407 X-Evolution-Source: pop://mailinglist%40farcite.net@mail.farcite.net/ X-Evolution: 00000681-0000 The floppy drive controller (on motherboard or card) does CRC calculations for write, and verification for read. This is how the O/S knows that there was an error and to retry. Only the Amiga O/S did the CRC calculation within the disk driver (trackdevice). R cdb wrote: > > A floopy drive doesn't, it will be done by (in DOS) IOS.sys from the > operating system or other similar O/S software. > > The floopy only knows if a disk is inserted and where its head is. > > colin > -- > cdb, bodgy1@optusnet.com.au on 14/11/2002 -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics