Organize decoders files&folders

DiscImageChef.Decoders/Floppy/Floppy.cs

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+/***************************************************************************
+The Disc Image Chef
+----------------------------------------------------------------------------
+ 
+Filename       : BD.cs
+Version        : 1.0
+Author(s)      : Natalia Portillo
+ 
+Component      : Decoders.
+
+Revision       : $Revision$
+Last change by : $Author$
+Date           : $Date$
+ 
+--[ Description ] ----------------------------------------------------------
+ 
+Decodes DVD structures.
+ 
+--[ License ] --------------------------------------------------------------
+ 
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as
+    published by the Free Software Foundation, either version 3 of the
+    License, or (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+----------------------------------------------------------------------------
+Copyright (C) 2011-2014 Claunia.com
+****************************************************************************/
+//$Id$
+using System;
+using System.Runtime.InteropServices;
+
+namespace DiscImageChef.Decoders
+{
+    // Information from:
+    // National Semiconductor PC87332VLJ datasheet
+    // SMsC FDC37C78 datasheet
+    // Intel 82078 datasheet
+    // Intel 82077AA datasheet
+    // Toshiba TC8566AF datasheet
+    // Fujitsu MB8876A datasheet
+    // Inside Macintosh, Volume II, ISBN 0-201-17732-3
+    // ECMA-147
+    // ECMA-100
+    public static class Floppy
+    {
+        #region Public enumerations
+
+        /// <summary>
+        /// In-sector code for sector size
+        /// </summary>
+        public enum IBMSectorSizeCode : byte
+        {
+            /// <summary>
+            /// 128 bytes/sector
+            /// </summary>
+            EighthKilo = 0,
+            /// <summary>
+            /// 256 bytes/sector
+            /// </summary>
+            QuarterKilo = 1,
+            /// <summary>
+            /// 512 bytes/sector
+            /// </summary>
+            HalfKilo = 2,
+            /// <summary>
+            /// 1024 bytes/sector
+            /// </summary>
+            Kilo = 3,
+            /// <summary>
+            /// 2048 bytes/sector
+            /// </summary>
+            TwiceKilo = 4,
+            /// <summary>
+            /// 4096 bytes/sector
+            /// </summary>
+            FriceKilo = 5,
+            /// <summary>
+            /// 8192 bytes/sector
+            /// </summary>
+            TwiceFriceKilo = 6,
+            /// <summary>
+            /// 16384 bytes/sector
+            /// </summary>
+            FricelyFriceKilo = 7
+        }
+
+        public enum IBMIdType : byte
+        {
+            IndexMark = 0xFC,
+            AddressMark = 0xFE,
+            DataMark = 0xFB,
+            DeletedDataMark = 0xF8
+        }
+
+        public enum AppleEncodedFormat : byte
+        {
+            /// <summary>
+            /// Disk is an Apple II 3.5" disk
+            /// </summary>
+            AppleII = 0x96,
+            /// <summary>
+            /// Disk is an Apple Lisa 3.5" disk
+            /// </summary>
+            Lisa = 0x97,
+            /// <summary>
+            /// Disk is an Apple Macintosh single-sided 3.5" disk
+            /// </summary>
+            MacSingleSide = 0x9A,
+            /// <summary>
+            /// Disk is an Apple Macintosh double-sided 3.5" disk
+            /// </summary>
+            MacDoubleSide = 0xD9
+        }
+
+        #endregion Public enumerations
+
+        #region Public structures
+
+        #region IBM System 3740 floppy
+
+        /// <summary>
+        /// Track format for IBM System 3740 floppy
+        /// </summary>
+        public struct IBMFMTrack
+        {
+            /// <summary>
+            /// Start of track
+            /// </summary>
+            public IBMFMTrackPreamble trackStart;
+            /// <summary>
+            /// Track sectors
+            /// </summary>
+            public IBMFMSector[] sectors;
+            /// <summary>
+            /// Undefined size
+            /// </summary>
+            public byte[] gap;
+        }
+
+        /// <summary>
+        /// Start of IBM PC FM floppy track
+        /// </summary>
+        public struct IBMFMTrackPreamble
+        {
+            /// <summary>
+            /// Gap from index pulse, 80 bytes set to 0xFF
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 40)]
+            public byte[] gap;
+            /// <summary>
+            /// 6 bytes set to 0x00
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
+            public byte[] zero;
+            /// <summary>
+            /// Set to <see cref="IBMIdType.IndexMark"/> 
+            /// </summary>
+            public IBMIdType type;
+            /// <summary>
+            /// Gap until first sector, 26 bytes to 0xFF
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 26)]
+            public byte[] gap1;
+        }
+
+        /// <summary>
+        /// Raw demodulated format for IBM System 3740 floppies
+        /// </summary>
+        public struct IBMFMSector
+        {
+            /// <summary>
+            /// Sector address mark
+            /// </summary>
+            public IBMFMSectorAddressMark addressMark;
+            /// <summary>
+            /// 11 bytes set to 0xFF
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 11)]
+            public byte[] innerGap;
+            /// <summary>
+            /// Sector data block
+            /// </summary>
+            public IBMFMSectorAddressMark dataBlock;
+            /// <summary>
+            /// Variable bytes set to 0xFF
+            /// </summary>
+            public byte[] outerGap;
+        }
+
+        /// <summary>
+        /// Sector address mark for IBM System 3740 floppies, contains sync word
+        /// </summary>
+        public struct IBMFMSectorAddressMark
+        {
+            /// <summary>
+            /// 6 bytes set to 0
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
+            public byte[] zero;
+            /// <summary>
+            /// Set to <see cref="IBMIdType.AddressMark"/>
+            /// </summary>
+            public IBMIdType type;
+            /// <summary>
+            /// Track number
+            /// </summary>
+            public byte track;
+            /// <summary>
+            /// Side number
+            /// </summary>
+            public byte side;
+            /// <summary>
+            /// Sector number
+            /// </summary>
+            public byte sector;
+            /// <summary>
+            /// <see cref="IBMSectorSizeCode"/> 
+            /// </summary>
+            public IBMSectorSizeCode sectorSize;
+            /// <summary>
+            /// CRC16 from <see cref="type"/> to end of <see cref="sectorSize"/> 
+            /// </summary>
+            public UInt16 crc;
+        }
+
+        /// <summary>
+        /// Sector data block for IBM System 3740 floppies
+        /// </summary>
+        public struct IBMFMSectorDataBlock
+        {
+            /// <summary>
+            /// 12 bytes set to 0
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
+            public byte[] zero;
+            /// <summary>
+            /// Set to <see cref="IBMIdType.DataMark"/> or to <see cref="IBMIdType.DeletedDataMark"/>
+            /// </summary>
+            public IBMIdType type;
+            /// <summary>
+            /// User data
+            /// </summary>
+            public byte[] data;
+            /// <summary>
+            /// CRC16 from <see cref="type"/> to end of <see cref="data"/> 
+            /// </summary>
+            public UInt16 crc;
+        }
+
+        #endregion IBM System 3740 floppy
+
+        #region IBM System 34 floppy
+
+        /// <summary>
+        /// Track format for IBM System 34 floppy
+        /// Used by IBM PC, Apple Macintosh (high-density only), and a lot others
+        /// </summary>
+        public struct IBMMFMTrack
+        {
+            /// <summary>
+            /// Start of track
+            /// </summary>
+            public IBMMFMTrackPreamble trackStart;
+            /// <summary>
+            /// Track sectors
+            /// </summary>
+            public IBMMFMSector[] sectors;
+            /// <summary>
+            /// Undefined size
+            /// </summary>
+            public byte[] gap;
+        }
+
+        /// <summary>
+        /// Start of IBM PC MFM floppy track
+        /// Used by IBM PC, Apple Macintosh (high-density only), and a lot others
+        /// </summary>
+        public struct IBMMFMTrackPreamble
+        {
+            /// <summary>
+            /// Gap from index pulse, 80 bytes set to 0x4E
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 80)]
+            public byte[] gap;
+            /// <summary>
+            /// 12 bytes set to 0x00
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
+            public byte[] zero;
+            /// <summary>
+            /// 3 bytes set to 0xC2
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] ctwo;
+            /// <summary>
+            /// Set to <see cref="IBMIdType.IndexMark"/> 
+            /// </summary>
+            public IBMIdType type;
+            /// <summary>
+            /// Gap until first sector, 50 bytes to 0x4E
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 50)]
+            public byte[] gap1;
+        }
+
+        /// <summary>
+        /// Raw demodulated format for IBM System 34 floppies
+        /// </summary>
+        public struct IBMMFMSector
+        {
+            /// <summary>
+            /// Sector address mark
+            /// </summary>
+            public IBMMFMSectorAddressMark addressMark;
+            /// <summary>
+            /// 22 bytes set to 0x4E, set to 0x22 on Commodore 1581
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 22)]
+            public byte[] innerGap;
+            /// <summary>
+            /// Sector data block
+            /// </summary>
+            public IBMMFMSectorAddressMark dataBlock;
+            /// <summary>
+            /// Variable bytes set to 0x4E, ECMA defines 54
+            /// </summary>
+            public byte[] outerGap;
+        }
+
+        /// <summary>
+        /// Sector address mark for IBM System 34 floppies, contains sync word
+        /// </summary>
+        public struct IBMMFMSectorAddressMark
+        {
+            /// <summary>
+            /// 12 bytes set to 0
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
+            public byte[] zero;
+            /// <summary>
+            /// 3 bytes set to 0xA1
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] aone;
+            /// <summary>
+            /// Set to <see cref="IBMIdType.AddressMark"/>
+            /// </summary>
+            public IBMIdType type;
+            /// <summary>
+            /// Track number
+            /// </summary>
+            public byte track;
+            /// <summary>
+            /// Side number
+            /// </summary>
+            public byte side;
+            /// <summary>
+            /// Sector number
+            /// </summary>
+            public byte sector;
+            /// <summary>
+            /// <see cref="IBMSectorSizeCode"/> 
+            /// </summary>
+            public IBMSectorSizeCode sectorSize;
+            /// <summary>
+            /// CRC16 from <see cref="IBMMFMSectorAddressMark.aone"/> to end of <see cref="sectorSize"/> 
+            /// </summary>
+            public UInt16 crc;
+        }
+
+        /// <summary>
+        /// Sector data block for IBM System 34 floppies
+        /// </summary>
+        public struct IBMMFMSectorDataBlock
+        {
+            /// <summary>
+            /// 12 bytes set to 0
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
+            public byte[] zero;
+            /// <summary>
+            /// 3 bytes set to 0xA1
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] aone;
+            /// <summary>
+            /// Set to <see cref="IBMIdType.DataMark"/> or to <see cref="IBMIdType.DeletedDataMark"/>
+            /// </summary>
+            public IBMIdType type;
+            /// <summary>
+            /// User data
+            /// </summary>
+            public byte[] data;
+            /// <summary>
+            /// CRC16 from <see cref="aone"/> to end of <see cref="data"/> 
+            /// </summary>
+            public UInt16 crc;
+        }
+
+        #endregion IBM System 34 floppy
+
+        #region Perpendicular MFM floppy
+
+        /// <summary>
+        /// Perpendicular floppy track
+        /// </summary>
+        public struct PerpendicularFloppyTrack
+        {
+            /// <summary>
+            /// Start of track
+            /// </summary>
+            public IBMMFMTrackPreamble trackStart;
+            /// <summary>
+            /// Track sectors
+            /// </summary>
+            public PerpendicularFloppySector[] sectors;
+            /// <summary>
+            /// Undefined size
+            /// </summary>
+            public byte[] gap;
+        }
+
+        /// <summary>
+        /// Raw demodulated format for perpendicular floppies
+        /// </summary>
+        public struct PerpendicularFloppySector
+        {
+            /// <summary>
+            /// Sector address mark
+            /// </summary>
+            public IBMMFMSectorAddressMark addressMark;
+            /// <summary>
+            /// 41 bytes set to 0x4E
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 41)]
+            public byte[] innerGap;
+            /// <summary>
+            /// Sector data block
+            /// </summary>
+            public IBMMFMSectorDataBlock dataBlock;
+            /// <summary>
+            /// Variable-sized inter-sector gap, ECMA defines 83 bytes
+            /// </summary>
+            public byte[] outerGap;
+        }
+
+        #endregion Perpendicular MFM floppy
+
+        #region ISO floppy
+
+        /// <summary>
+        /// ISO floppy track, also used by Atari ST and others
+        /// </summary>
+        public struct ISOFloppyTrack
+        {
+            /// <summary>
+            /// Start of track, 32 bytes set to 0x4E
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
+            public byte[] innerGap;
+            /// <summary>
+            /// Track sectors
+            /// </summary>
+            public IBMMFMSector[] sectors;
+            /// <summary>
+            /// Undefined size
+            /// </summary>
+            public byte[] gap;
+        }
+
+        #endregion ISO floppy
+
+        #region Apple ][ GCR floppy
+
+        /// <summary>
+        /// GCR-encoded Apple ][ GCR floppy track
+        /// </summary>
+        public struct AppleOldGCRRawSectorRawTrack
+        {
+            /// <summary>
+            /// Track preamble, set to self-sync 0xFF, between 40 and 95 bytes
+            /// </summary>
+            public byte[] gap;
+            public AppleOldGCRRawSector[] sectors;
+        }
+
+        /// <summary>
+        /// GCR-encoded Apple ][ GCR floppy sector
+        /// </summary>
+        public struct AppleOldGCRRawSector
+        {
+            /// <summary>
+            /// Address field
+            /// </summary>
+            public AppleOldGCRRawAddressField addressField;
+            /// <summary>
+            /// Track preamble, set to self-sync 0xFF, between 5 and 10 bytes
+            /// </summary>
+            public byte[] innerGap;
+            /// <summary>
+            /// Data field
+            /// </summary>
+            public AppleOldGCRRawDataField dataField;
+            /// <summary>
+            /// Track preamble, set to self-sync 0xFF, between 14 and 24 bytes
+            /// </summary>
+            public byte[] gap;
+        }
+
+        /// <summary>
+        /// GCR-encoded Apple ][ GCR floppy sector address field
+        /// </summary>
+        public struct AppleOldGCRRawAddressField
+        {
+            /// <summary>
+            /// Always 0xD5, 0xAA, 0x96
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] prologue;
+            /// <summary>
+            /// Volume number encoded as:
+            /// volume[0] = (decodedVolume >> 1) | 0xAA
+            /// volume[1] = decodedVolume | 0xAA
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
+            public byte[] volume;
+            /// <summary>
+            /// Track number encoded as:
+            /// track[0] = (decodedTrack >> 1) | 0xAA
+            /// track[1] = decodedTrack | 0xAA
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
+            public byte[] track;
+            /// <summary>
+            /// Sector number encoded as:
+            /// sector[0] = (decodedSector >> 1) | 0xAA
+            /// sector[1] = decodedSector | 0xAA
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
+            public byte[] sector;
+            /// <summary>
+            /// decodedChecksum = decodedVolume ^ decodedTrack ^ decodedSector
+            /// checksum[0] = (decodedChecksum >> 1) | 0xAA
+            /// checksum[1] = decodedChecksum | 0xAA
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
+            public byte[] checksum;
+            /// <summary>
+            /// Always 0xDE, 0xAA, 0xEB
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] epilogue;
+        }
+
+        /// <summary>
+        /// GCR-encoded Apple ][ GCR floppy sector data field
+        /// </summary>
+        public struct AppleOldGCRRawDataField
+        {
+            /// <summary>
+            /// Always 0xD5, 0xAA, 0xAD
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] prologue;
+            /// <summary>
+            /// Encoded data bytes.
+            /// 410 bytes for 5to3 (aka DOS 3.2) format
+            /// 342 bytes for 6to2 (aka DOS 3.3) format
+            /// </summary>
+            public byte[] data;
+            public byte checksum;
+            /// <summary>
+            /// Always 0xDE, 0xAA, 0xEB
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] epilogue;
+        }
+
+        #endregion Apple ][ GCR floppy
+
+        #region Apple Sony GCR floppy
+
+        /// <summary>
+        /// GCR-encoded Apple Sony GCR floppy track
+        /// </summary>
+        public struct AppleSonyGCRRawSectorRawTrack
+        {
+            /// <summary>
+            /// Track preamble, set to self-sync 0xFF, 36 bytes
+            /// </summary>
+            public byte[] gap;
+            public AppleOldGCRRawSector[] sectors;
+        }
+
+        /// <summary>
+        /// GCR-encoded Apple Sony GCR floppy sector
+        /// </summary>
+        public struct AppleSonyGCRRawSector
+        {
+            /// <summary>
+            /// Address field
+            /// </summary>
+            public AppleSonyGCRRawAddressField addressField;
+            /// <summary>
+            /// Track preamble, set to self-sync 0xFF, 6 bytes
+            /// </summary>
+            public byte[] innerGap;
+            /// <summary>
+            /// Data field
+            /// </summary>
+            public AppleSonyGCRRawDataField dataField;
+            /// <summary>
+            /// Track preamble, set to self-sync 0xFF, unknown size
+            /// </summary>
+            public byte[] gap;
+        }
+
+        /// <summary>
+        /// GCR-encoded Apple Sony GCR floppy sector address field
+        /// </summary>
+        public struct AppleSonyGCRRawAddressField
+        {
+            /// <summary>
+            /// Always 0xD5, 0xAA, 0x96
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] prologue;
+            /// <summary>
+            /// Encoded (decodedTrack & 0x3F)
+            /// </summary>
+            public byte track;
+            /// <summary>
+            /// Encoded sector number
+            /// </summary>
+            public byte sector;
+            /// <summary>
+            /// Encoded side number
+            /// </summary>
+            public byte side;
+            /// <summary>
+            /// Disk format
+            /// </summary>
+            public AppleEncodedFormat format;
+            /// <summary>
+            /// Checksum
+            /// </summary>
+            public byte checksum;
+            /// <summary>
+            /// Always 0xDE, 0xAA
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
+            public byte[] epilogue;
+        }
+
+        /// <summary>
+        /// GCR-encoded Apple ][ GCR floppy sector data field
+        /// </summary>
+        public struct AppleSonyGCRRawDataField
+        {
+            /// <summary>
+            /// Always 0xD5, 0xAA, 0xAD
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+            public byte[] prologue;
+            /// <summary>
+            /// Spare, usually <see cref="AppleSonyGCRRawAddressField.sector"/> 
+            /// </summary>
+            public byte spare;
+            /// <summary>
+            /// Encoded data bytes.
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 698)]
+            public byte[] data;
+            /// <summary>
+            /// Checksum
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
+            public byte[] checksum;
+            /// <summary>
+            /// Always 0xDE, 0xAA
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
+            public byte[] epilogue;
+        }
+
+        #endregion Apple Sony GCR floppy
+
+        #region Commodore GCR decoded
+
+        /// <summary>
+        /// Decoded Commodore GCR sector header
+        /// </summary>
+        public struct CommodoreSectorHeader
+        {
+            /// <summary>
+            /// Always 0x08
+            /// </summary>
+            public byte id;
+            /// <summary>
+            /// XOR of following fields
+            /// </summary>
+            public byte checksum;
+            /// <summary>
+            /// Sector number
+            /// </summary>
+            public byte sector;
+            /// <summary>
+            /// Track number
+            /// </summary>
+            public byte track;
+            /// <summary>
+            /// Format ID, unknown meaning
+            /// </summary>
+            public UInt16 format;
+            /// <summary>
+            /// Filled with 0x0F
+            /// </summary>
+            public UInt16 fill;
+        }
+
+        /// <summary>
+        /// Decoded Commodore GCR sector data
+        /// </summary>
+        public struct CommodoreSectorData
+        {
+            /// <summary>
+            /// Always 0x07
+            /// </summary>
+            public byte id;
+            /// <summary>
+            /// User data
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)]
+            public byte data;
+            /// <summary>
+            /// XOR of <see cref="data"/>
+            /// </summary>
+            public byte checksum;
+            /// <summary>
+            /// Filled with 0x0F
+            /// </summary>
+            public UInt16 fill;
+        }
+
+        #endregion Commodore GCR decoded
+
+        #region Commodore Amiga
+
+        public struct CommodoreAmigaSector
+        {
+            /// <summary>
+            /// Set to 0x00
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
+            public byte[] zero;
+            /// <summary>
+            /// Set to 0xA1
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
+            public byte[] sync;
+            /// <summary>
+            /// Set to 0xFF
+            /// </summary>
+            public byte amiga;
+            /// <summary>
+            /// Track number
+            /// </summary>
+            public byte track;
+            /// <summary>
+            /// Sector number
+            /// </summary>
+            public byte sector;
+            /// <summary>
+            /// Remaining sectors til end of writing
+            /// </summary>
+            public byte remaining;
+            /// <summary>
+            /// OS dependent tag
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
+            public byte[] label;
+            /// <summary>
+            /// Checksum from <see cref="amiga"/> to <see cref="label"/> 
+            /// </summary>
+            public UInt32 headerChecksum;
+            /// <summary>
+            /// Checksum from <see cref="data"/>
+            /// </summary>
+            public UInt32 dataChecksum;
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 512)]
+            public byte[] data;
+        }
+
+        #endregion Commodore Amiga
+
+        #endregion Public structures
+    }
+}
+