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530 lines
18 KiB
C#
530 lines
18 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : DIM.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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// Manages DIM 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 © 2011-2018 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using DiscImageChef.CommonTypes;
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using DiscImageChef.Console;
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using DiscImageChef.Filters;
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namespace DiscImageChef.DiscImages
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{
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public class Dim : ImagePlugin
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{
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#region Internal enumerations
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enum DiskType : byte
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{
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Hd2 = 0,
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Hs2 = 1,
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Hc2 = 2,
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Hde2 = 3,
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Hq2 = 9,
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N88 = 17
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}
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#endregion
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#region Internal constants
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readonly byte[] headerId = {0x44, 0x49, 0x46, 0x43, 0x20, 0x48, 0x45, 0x41, 0x44, 0x45, 0x52, 0x20, 0x20};
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#endregion
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#region Internal variables
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/// <summary>Start of data sectors in disk image, should be 0x100</summary>
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const uint DATA_OFFSET = 0x100;
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/// <summary>Disk image file</summary>
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Filter dimImageFilter;
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byte[] comment;
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byte[] hdrId;
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DiskType dskType;
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#endregion
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public Dim()
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{
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Name = "DIM Disk Image";
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PluginUuid = new Guid("0240B7B1-E959-4CDC-B0BD-386D6E467B88");
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ImageInfo = new ImageInfo
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{
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ReadableSectorTags = new List<SectorTagType>(),
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ReadableMediaTags = new List<MediaTagType>(),
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ImageHasPartitions = false,
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ImageHasSessions = false,
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ImageVersion = null,
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ImageApplication = null,
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ImageApplicationVersion = null,
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ImageCreator = null,
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ImageComments = null,
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MediaManufacturer = null,
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MediaModel = null,
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MediaSerialNumber = null,
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MediaBarcode = null,
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MediaPartNumber = null,
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MediaSequence = 0,
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LastMediaSequence = 0,
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DriveManufacturer = null,
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DriveModel = null,
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DriveSerialNumber = null,
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DriveFirmwareRevision = null
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};
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}
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public override bool IdentifyImage(Filter imageFilter)
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{
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Stream stream = imageFilter.GetDataForkStream();
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stream.Seek(0, SeekOrigin.Begin);
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if(stream.Length < DATA_OFFSET) return false;
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comment = new byte[60];
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hdrId = new byte[13];
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stream.Seek(0, SeekOrigin.Begin);
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dskType = (DiskType)stream.ReadByte();
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stream.Seek(0xAB, SeekOrigin.Begin);
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stream.Read(hdrId, 0, 13);
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stream.Seek(0xC2, SeekOrigin.Begin);
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stream.Read(comment, 0, 60);
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return headerId.SequenceEqual(hdrId);
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}
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public override bool OpenImage(Filter imageFilter)
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{
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Stream stream = imageFilter.GetDataForkStream();
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stream.Seek(0, SeekOrigin.Begin);
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if(stream.Length < DATA_OFFSET) return false;
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long diskSize = stream.Length - DATA_OFFSET;
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comment = new byte[60];
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hdrId = new byte[13];
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stream.Seek(0, SeekOrigin.Begin);
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dskType = (DiskType)stream.ReadByte();
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stream.Seek(0xAB, SeekOrigin.Begin);
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stream.Read(hdrId, 0, 13);
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stream.Seek(0xC2, SeekOrigin.Begin);
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stream.Read(comment, 0, 60);
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if(!headerId.SequenceEqual(hdrId)) return false;
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ImageInfo.MediaType = MediaType.Unknown;
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switch(dskType)
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{
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// 8 spt, 1024 bps
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case DiskType.Hd2:
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if(diskSize % (2 * 8 * 1024) != 0)
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{
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DicConsole.ErrorWriteLine("DIM shows unknown image with {0} tracks", diskSize / (2 * 8 * 1024));
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return false;
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}
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if(diskSize / (2 * 8 * 1024) == 77) ImageInfo.MediaType = MediaType.SHARP_525;
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ImageInfo.SectorSize = 1024;
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break;
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// 9 spt, 1024 bps
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case DiskType.Hs2:
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if(diskSize % (2 * 9 * 512) != 0)
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{
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DicConsole.ErrorWriteLine("DIM shows unknown image with {0} tracks", diskSize / (2 * 9 * 512));
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return false;
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}
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if(diskSize / (2 * 9 * 512) == 80) ImageInfo.MediaType = MediaType.SHARP_525_9;
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ImageInfo.SectorSize = 512;
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break;
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// 15 spt, 512 bps
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case DiskType.Hc2:
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if(diskSize % (2 * 15 * 512) != 0)
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{
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DicConsole.ErrorWriteLine("DIM shows unknown image with {0} tracks", diskSize / (2 * 15 * 512));
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return false;
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}
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if(diskSize / (2 * 15 * 512) == 80) ImageInfo.MediaType = MediaType.DOS_525_HD;
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ImageInfo.SectorSize = 512;
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break;
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// 9 spt, 1024 bps
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case DiskType.Hde2:
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if(diskSize % (2 * 9 * 512) != 0)
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{
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DicConsole.ErrorWriteLine("DIM shows unknown image with {0} tracks", diskSize / (2 * 9 * 512));
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return false;
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}
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if(diskSize / (2 * 9 * 512) == 80) ImageInfo.MediaType = MediaType.SHARP_35_9;
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ImageInfo.SectorSize = 512;
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break;
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// 18 spt, 512 bps
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case DiskType.Hq2:
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if(diskSize % (2 * 18 * 512) != 0)
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{
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DicConsole.ErrorWriteLine("DIM shows unknown image with {0} tracks", diskSize / (2 * 18 * 512));
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return false;
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}
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if(diskSize / (2 * 18 * 512) == 80) ImageInfo.MediaType = MediaType.DOS_35_HD;
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ImageInfo.SectorSize = 512;
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break;
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// 26 spt, 256 bps
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case DiskType.N88:
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if(diskSize % (2 * 26 * 256) == 0)
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{
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if(diskSize % (2 * 26 * 256) == 77) ImageInfo.MediaType = MediaType.NEC_8_DD;
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ImageInfo.SectorSize = 256;
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}
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else if(diskSize % (2 * 26 * 128) == 0)
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{
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if(diskSize % (2 * 26 * 128) == 77) ImageInfo.MediaType = MediaType.NEC_8_SD;
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ImageInfo.SectorSize = 256;
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}
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else
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{
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DicConsole.ErrorWriteLine("DIM shows unknown image with {0} tracks", diskSize / (2 * 26 * 256));
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return false;
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}
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break;
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default: return false;
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}
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DicConsole.VerboseWriteLine("DIM image contains a disk of type {0}", ImageInfo.MediaType);
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if(!string.IsNullOrEmpty(ImageInfo.ImageComments))
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DicConsole.VerboseWriteLine("DIM comments: {0}", ImageInfo.ImageComments);
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dimImageFilter = imageFilter;
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ImageInfo.ImageSize = (ulong)diskSize;
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ImageInfo.ImageCreationTime = imageFilter.GetCreationTime();
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ImageInfo.ImageLastModificationTime = imageFilter.GetLastWriteTime();
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ImageInfo.ImageName = Path.GetFileNameWithoutExtension(imageFilter.GetFilename());
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ImageInfo.Sectors = ImageInfo.ImageSize / ImageInfo.SectorSize;
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ImageInfo.ImageComments = StringHandlers.CToString(comment, Encoding.GetEncoding(932));
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ImageInfo.XmlMediaType = XmlMediaType.BlockMedia;
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switch(ImageInfo.MediaType)
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{
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case MediaType.SHARP_525:
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ImageInfo.Cylinders = 77;
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ImageInfo.Heads = 2;
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ImageInfo.SectorsPerTrack = 8;
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break;
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case MediaType.SHARP_525_9:
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ImageInfo.Cylinders = 80;
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ImageInfo.Heads = 2;
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ImageInfo.SectorsPerTrack = 9;
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break;
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case MediaType.DOS_525_HD:
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ImageInfo.Cylinders = 80;
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ImageInfo.Heads = 2;
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ImageInfo.SectorsPerTrack = 15;
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break;
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case MediaType.SHARP_35_9:
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ImageInfo.Cylinders = 80;
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ImageInfo.Heads = 2;
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ImageInfo.SectorsPerTrack = 9;
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break;
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case MediaType.DOS_35_HD:
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ImageInfo.Cylinders = 80;
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ImageInfo.Heads = 2;
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ImageInfo.SectorsPerTrack = 18;
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break;
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case MediaType.NEC_8_DD:
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case MediaType.NEC_8_SD:
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ImageInfo.Cylinders = 77;
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ImageInfo.Heads = 2;
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ImageInfo.SectorsPerTrack = 26;
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break;
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}
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return true;
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}
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public override bool ImageHasPartitions()
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{
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return false;
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}
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public override ulong GetImageSize()
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{
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return ImageInfo.ImageSize;
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}
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public override ulong GetSectors()
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{
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return ImageInfo.Sectors;
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}
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public override uint GetSectorSize()
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{
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return ImageInfo.SectorSize;
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}
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public override string GetImageFormat()
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{
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return "DIM disk image";
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}
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public override string GetImageVersion()
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{
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return ImageInfo.ImageVersion;
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}
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public override string GetImageApplication()
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{
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return ImageInfo.ImageApplication;
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}
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public override string GetImageApplicationVersion()
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{
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return ImageInfo.ImageApplicationVersion;
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}
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public override string GetImageCreator()
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{
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return ImageInfo.ImageCreator;
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}
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public override DateTime GetImageCreationTime()
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{
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return ImageInfo.ImageCreationTime;
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}
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public override DateTime GetImageLastModificationTime()
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{
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return ImageInfo.ImageLastModificationTime;
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}
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public override string GetImageName()
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{
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return ImageInfo.ImageName;
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}
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public override string GetImageComments()
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{
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return ImageInfo.ImageComments;
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}
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public override MediaType GetMediaType()
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{
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return ImageInfo.MediaType;
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}
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public override byte[] ReadSector(ulong sectorAddress)
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{
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return ReadSectors(sectorAddress, 1);
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}
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public override byte[] ReadSectors(ulong sectorAddress, uint length)
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{
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if(sectorAddress > ImageInfo.Sectors - 1)
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throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
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if(sectorAddress + length > ImageInfo.Sectors)
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throw new ArgumentOutOfRangeException(nameof(length), "Requested more sectors than available");
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byte[] buffer = new byte[length * ImageInfo.SectorSize];
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Stream stream = dimImageFilter.GetDataForkStream();
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stream.Seek((long)(DATA_OFFSET + sectorAddress * ImageInfo.SectorSize), SeekOrigin.Begin);
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stream.Read(buffer, 0, (int)(length * ImageInfo.SectorSize));
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return buffer;
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}
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#region Unsupported features
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public override byte[] ReadDiskTag(MediaTagType tag)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorTag(ulong sectorAddress, SectorTagType tag)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSector(ulong sectorAddress, uint track)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorTag(ulong sectorAddress, uint track, SectorTagType tag)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorsTag(ulong sectorAddress, uint length, SectorTagType tag)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectors(ulong sectorAddress, uint length, uint track)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorsTag(ulong sectorAddress, uint length, uint track, SectorTagType tag)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorLong(ulong sectorAddress)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorLong(ulong sectorAddress, uint track)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorsLong(ulong sectorAddress, uint length)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorsLong(ulong sectorAddress, uint length, uint track)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override string GetMediaManufacturer()
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{
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return null;
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}
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public override string GetMediaModel()
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{
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return null;
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}
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public override string GetMediaSerialNumber()
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{
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return null;
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}
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public override string GetMediaBarcode()
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{
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return null;
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}
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public override string GetMediaPartNumber()
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{
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return null;
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}
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public override int GetMediaSequence()
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{
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return 0;
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}
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public override int GetLastDiskSequence()
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{
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return 0;
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}
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public override string GetDriveManufacturer()
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{
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return null;
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}
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public override string GetDriveModel()
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{
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return null;
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}
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public override string GetDriveSerialNumber()
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{
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return null;
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}
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public override List<Partition> GetPartitions()
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override List<Track> GetTracks()
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override List<Track> GetSessionTracks(Session session)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override List<Track> GetSessionTracks(ushort session)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override List<Session> GetSessions()
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override bool? VerifySector(ulong sectorAddress)
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{
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return null;
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}
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public override bool? VerifySector(ulong sectorAddress, uint track)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override bool? VerifySectors(ulong sectorAddress, uint length, out List<ulong> failingLbas,
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out List<ulong> unknownLbas)
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{
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failingLbas = new List<ulong>();
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unknownLbas = new List<ulong>();
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for(ulong i = 0; i < ImageInfo.Sectors; i++) unknownLbas.Add(i);
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return null;
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}
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public override bool? VerifySectors(ulong sectorAddress, uint length, uint track, out List<ulong> failingLbas,
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out List<ulong> unknownLbas)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override bool? VerifyMediaImage()
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{
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return null;
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}
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#endregion
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}
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} |