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112 lines
5.0 KiB
C#
112 lines
5.0 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Structs.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Disk image plugins.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Contains structures for Sydex CopyQM disk images.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2025 Natalia Portillo
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// ****************************************************************************/
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using System.Runtime.InteropServices;
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namespace Aaru.Images;
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public sealed partial class CopyQm
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{
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#region Nested type: Header
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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readonly struct Header
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{
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/// <summary>0x00 magic, "CQ"</summary>
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public readonly ushort magic;
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/// <summary>0x02 always 0x14</summary>
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public readonly byte mark;
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/// <summary>0x03 Bytes per sector (part of FAT's BPB)</summary>
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public readonly ushort sectorSize;
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/// <summary>0x05 Sectors per cluster (part of FAT's BPB)</summary>
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public readonly byte sectorPerCluster;
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/// <summary>0x06 Reserved sectors (part of FAT's BPB)</summary>
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public readonly ushort reservedSectors;
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/// <summary>0x08 Number of FAT copies (part of FAT's BPB)</summary>
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public readonly byte fatCopy;
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/// <summary>0x09 Maximum number of entries in root directory (part of FAT's BPB)</summary>
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public readonly ushort rootEntries;
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/// <summary>0x0B Sectors on disk (part of FAT's BPB)</summary>
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public readonly ushort sectors;
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/// <summary>0x0D Media descriptor (part of FAT's BPB)</summary>
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public readonly byte mediaType;
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/// <summary>0x0E Sectors per FAT (part of FAT's BPB)</summary>
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public readonly ushort sectorsPerFat;
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/// <summary>0x10 Sectors per track (part of FAT's BPB)</summary>
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public readonly ushort sectorsPerTrack;
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/// <summary>0x12 Heads (part of FAT's BPB)</summary>
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public readonly ushort heads;
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/// <summary>0x14 Hidden sectors (part of FAT's BPB)</summary>
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public readonly uint hidden;
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/// <summary>0x18 Sectors on disk (part of FAT's BPB)</summary>
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public readonly uint sectorsBig;
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/// <summary>0x1C Description</summary>
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[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 60)]
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public readonly string description;
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/// <summary>0x58 Blind mode. 0 = DOS, 1 = blind, 2 = HFS</summary>
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public readonly byte blind;
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/// <summary>0x59 Density. 0 = Double, 1 = High, 2 = Quad/Extra</summary>
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public readonly byte density;
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/// <summary>0x5A Cylinders in image</summary>
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public readonly byte imageCylinders;
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/// <summary>0x5B Cylinders on disk</summary>
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public readonly byte totalCylinders;
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/// <summary>0x5C CRC32 of data</summary>
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public readonly uint crc;
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/// <summary>0x60 DOS volume label</summary>
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[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 11)]
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public readonly string volumeLabel;
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/// <summary>0x6B Modification time</summary>
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public readonly ushort time;
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/// <summary>0x6D Modification date</summary>
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public readonly ushort date;
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/// <summary>0x6F Comment length</summary>
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public readonly ushort commentLength;
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/// <summary>0x71 Sector base (first sector - 1)</summary>
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public readonly byte secbs;
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/// <summary>0x72 Unknown</summary>
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public readonly ushort unknown;
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/// <summary>0x74 Interleave</summary>
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public readonly byte interleave;
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/// <summary>0x75 Skew</summary>
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public readonly byte skew;
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/// <summary>0x76 Source drive type. 1 = 5.25" DD, 2 = 5.25" HD, 3 = 3.5" DD, 4 = 3.5" HD, 6 = 3.5" ED</summary>
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public readonly byte drive;
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/// <summary>0x77 Filling bytes</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 13)]
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public readonly byte[] fill;
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/// <summary>0x84 Header checksum</summary>
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public readonly byte headerChecksum;
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}
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#endregion
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} |