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- The Disk Doctor
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- The Disk Doctor
- copyright 1985, 1986 Daniel Matejka
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- from Antic; the Atari Resource
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- The Disk Doctor is provided on an unprotected disk because
- the author and Antic both believe that the buyer should be able to
- make backup copies for his or her use ONLY. Because it is
- unprotected, we expect you to respect the copyright and NOT give,
- sell or even lend copies of this program to anyone else. Nor
- should you accept a copy from anyone; it's the same thing as
- giving one away.
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- The author spent many hours designing, developing, testing
- and writing this program. His income depends on its sales - an
- individual just like you who must work for a living. Pirate copies
- hurt him and make it less than worthwhile to continue to write
- quality products for this market if they are going to be stolen
- from him. Many other people worked to make this package what it
- is; the testers, marketing people, shippers, documentation writer:
- pirate copies make everyone's efforts less valuable and discourage
- quality efforts in the future.
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- The term piracy makes it sound like copying programs
- illegally is exciting, outlaw-ish and brave. It isn't. Piracy is
- theft. It's as illegal as shoplifting or burglary in the eyes of
- the law. Please help to discourage it so that we may continue to
- provide you with unprotected software as good as this.
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- No part of this publication may be reproduced, stored in a
- retrieval system or transmitted in any form or by any means
- electronic, mechanical, photocopying, recording or otherwise
- without prior written permission of the publisher. Antic and the
- author take no responsibility for any damage resulting from use or
- misuse of this program, nor do we have any liability for any
- losses, financial or otherwise incurred from the results of using
- this program. This is a powerful program and its potential for
- damage and error is significant in the hands of a novice. Make
- sure you know how to use it properly before attempting to work
- with valuable data or files.
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- Antic is a trademark of Antic Publishing Inc.
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- Documentation by Dan Matejka and Ian Chadwick
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- Introduction: Page 1
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- The Disk Doctor
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- Overview of the Disk Doctor
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- The Disk Doctor works on an Atari ST with one or two floppy
- disk drives and/or a hard disk drive. It works in monochrome or
- medium-resolution but not low-resolution. Before you use it, we
- recommend you back up the disk and all the files and store the
- original in a safe place.
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- Before the Disk Doctor can do anything useful, you must open
- either a file or disk with which to work. All "opening" does is
- fix the program's attention on one file or disk in particular. To
- look at something else, first close whatever is open and then open
- that new item.
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- Opening a disk allows you to access the boot sector and
- directory information, as well as the files on the disk. An ST
- disk is divided into 80 concentric circles called tracks, numbered
- from zero on the outside edge to 79 on the inside. Tracks are
- further subdivided into nine wedges called sectors. A sector - the
- smallest addressable amount of data on a disk - is 512 bytes long.
- There are 720 sectors on a disk, for a total of 360K.
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- The disk is a holding place for files. Since it can hold more
- than one file, it must in addition to the files themselves contain
- a directory listing these files and where on the disk they are. A
- disk also generally contains a "boot sector," which tells the
- computer either (a) how to start up when turned on, or (b) that it
- doesn't know how to tell the computer that and please look
- elsewhere. On the Atari 520ST, the boot sector is the first sector
- on the disk (#0). The next several sectors are the directory
- mentioned earlier and the remainder of the space on the disk is
- for files.
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- Space for files is allocated in clusters, explained further
- in the section on the File Allocation Table (FAT). A cluster is
- two sectors.
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- When your intention is to look at a file, it is much easier
- to open the file directly because files are often not stored
- contiguously on the disk. Although files reside on disks, opening
- a disk is a different operation from opening a file.
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- The Disk Doctor allows you to look directly at the data on a
- disk or in a file. You can change that data and write it back out
- to the disk. The Disk Doctor is also knowledgeable about the
- directory structure on the disk and can locate files, trace
- sectors links, patch up damaged disks or files and recover deleted
- files.
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- Introduction: Page 2
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- The Disk Doctor
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- Closing does any cleaning up that needs to be done on a
- changed file and tells the Disk Doctor to unfix its attention in
- preparation for fixing it on something new. "Cleaning up" is
- something the operating system insists is done and is all
- automatic. The Disk Doctor never leaves an unclean disk around
- unless the computer is turned off, or you remove the disks without
- first closing.
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- Quit stops the program and returns to the desktop. You can
- quit either through the menu or by holding the control key down
- and hitting the "Q" key. Several other commands are activated by
- control keys as shown on the menus.
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- It's recommended that you read the help files through first
- before you attempt to use this program in order to get a better
- understanding of how it works and how a disk is constructed. For a
- permanent record, print them out and study them at length. When
- printing or displaying, the space bar pauses and the Return key
- stops.
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- Introduction: Page 3
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