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Since the Amiga is a 680x0 based computer, integers that require more than In this document, hexadecimal values use the C syntax : for example 0x0c You can find new versions of this document at : If you find any mistakes in this document, have any comments about its content, Macintosh is a registered Trademark of Apple. No warranties are made as to its correctness.Īmiga and AmigaDOS are registered Trademarks of Gateway 2000. This document is Copyright (C) 1997-1999 by Laurent Clévy, but may be freelyĭistributed, provided the author name and addresses are included and Let's continue with more conventional things in an introduction. The partitions layer is explained in the 6th chapter. The volume layer is the biggest part of the document (4th and 5th chapters), The physical layer is described in the 2nd chapter, The next and last layer is the volume layer : where the files

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One partition, like Zip disks or hard disks. Is the partitions layer : this is how the AmigaDOS is managing media with more then The next layer, according to the 'most physical' to 'most conceptual' order, On a magnetic surface, with the RLL or MFM encoding. With physical layer, I'm talking about the way bytes are physically stored Storage media, from the magnetic layer to the files and directories layer. In this document, we will describe how the AmigaDOS is (was?) managing

Allowed/forbidden characters in volume and file names, 4GB limit.

The bitmap checksum algorithm is the same as the rootblock algorithm.

( New site Gary Harris, Old site Dan Sutherland)

The whole rewritten ADF library is released (0.7.8) and used within.

Correction about DIRC and INTL modes (section 4.1).

The WinUAE hardfile format section is starting.

Corrections suggested by Hans-Joachim Widmaier (Linux affs maintainer).

link to the Amiga Floppy Reader project.

Blocksizes other than 512 bytes documented.

"RKRM : Libraries and Devices, appendix C"

minor additions to the MFM track format, from an online version of.

suggestions by Jörg Strohmayer (author of aminet:disk/moni/DiskMonTools.lha).

suggestions (last ones) by Hans-Joachim.

fix: the hashvalue function was buggy on some rare name.

ADFlib is used by ADFview from Bjarke Viksoe.

Thanks to Keith Monahan 1.10 (November 27th, 2001) The algorithm was correct, but the associated comments were wrong.

Labelling mistake was in MFM decoding description: odd and even bits was reversed.

Type of MFM data at 0x40 and 0x240 are BYTE and not LONG, of course. The Hard file : a big floppy dump file 8.

4.7 How are the blocks associated with the dircache mode ? 5.

4.6 How are links implemented in AmigaDOS ?.

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4.3 How are the free and used block lists managed ?.

#Amiga workbench adf pack how to#

4.2.1 How to find the first sector of an entry ?.What is the logical organisation of an Amiga volume ?

What is the Amiga floppy disk geometry ? 4. How bytes are physically read from and written to a disk ? The intent is to explain in detail how the Amiga storesįiles and directories on floppy and hard disks.Ī set of C routines (ADFlib) will be supplied to manage the ADF format.