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681 lines
27 KiB
C#
681 lines
27 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : ProDOS.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Apple ProDOS filesystem plugin.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies the Apple ProDOS filesystem and shows information.
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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 © 2011-2017 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.Text;
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using DiscImageChef.CommonTypes;
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using DiscImageChef.Console;
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namespace DiscImageChef.Filesystems
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{
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// Information from Apple ProDOS 8 Technical Reference
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public class ProDOSPlugin : Filesystem
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{
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const byte EmptyStorageType = 0x00;
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/// <summary>
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/// A file that occupies one block or less
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/// </summary>
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const byte SeedlingFileType = 0x01;
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/// <summary>
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/// A file that occupies between 2 and 256 blocks
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/// </summary>
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const byte SaplingFileType = 0x02;
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/// <summary>
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/// A file that occupies between 257 and 32768 blocks
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/// </summary>
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const byte TreeFileType = 0x03;
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const byte PascalAreaType = 0x04;
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const byte SubDirectoryType = 0x0D;
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const byte SubDirectoryHeaderType = 0x0E;
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const byte RootDirectoryType = 0x0F;
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const byte ProDOSVersion1 = 0x00;
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const uint ProDOSYearMask = 0xFE000000;
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const uint ProDOSMonthMask = 0x1E00000;
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const uint ProDOSDayMask = 0x1F0000;
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const uint ProDOSHourMask = 0x1F00;
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const uint ProDOSMinuteMask = 0x3F;
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const byte ProDOSDestroyAttribute = 0x80;
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const byte ProDOSRenameAttribute = 0x40;
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const byte ProDOSBackupAttribute = 0x20;
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const byte ProDOSWriteAttribute = 0x02;
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const byte ProDOSReadAttribute = 0x01;
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const byte ProDOSReservedAttributeMask = 0x1C;
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const byte ProDOSStorageTypeMask = 0xF0;
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const byte ProDOSNameLengthMask = 0x0F;
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const byte ProDOSEntryLength = 0x27;
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const byte ProDOSEntriesPerBlock = 0x0D;
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public ProDOSPlugin()
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{
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Name = "Apple ProDOS filesystem";
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PluginUUID = new Guid("43874265-7B8A-4739-BCF7-07F80D5932BF");
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CurrentEncoding = new Claunia.Encoding.LisaRoman();
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}
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public ProDOSPlugin(Encoding encoding)
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{
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Name = "Apple ProDOS filesystem";
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PluginUUID = new Guid("43874265-7B8A-4739-BCF7-07F80D5932BF");
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// TODO: Until Apple ][ encoding is implemented
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CurrentEncoding = new Claunia.Encoding.LisaRoman();
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}
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public ProDOSPlugin(ImagePlugins.ImagePlugin imagePlugin, Partition partition, Encoding encoding)
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{
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Name = "Apple ProDOS filesystem";
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PluginUUID = new Guid("43874265-7B8A-4739-BCF7-07F80D5932BF");
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// TODO: Until Apple ][ encoding is implemented
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CurrentEncoding = new Claunia.Encoding.LisaRoman();
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}
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public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, Partition partition)
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{
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if(partition.Length < 3)
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return false;
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// Blocks 0 and 1 are boot code
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byte[] rootDirectoryKeyBlock = imagePlugin.ReadSector(2 + partition.Start);
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bool APMFromHDDOnCD = false;
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if(imagePlugin.GetSectorSize() == 2352 || imagePlugin.GetSectorSize() == 2448 || imagePlugin.GetSectorSize() == 2048)
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{
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byte[] tmp = imagePlugin.ReadSectors(partition.Start, 2);
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foreach(int offset in new[] { 0, 0x200, 0x400, 0x600, 0x800, 0xA00 })
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{
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if(BitConverter.ToUInt16(tmp, offset) == 0 &&
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(byte)((tmp[offset + 0x04] & ProDOSStorageTypeMask) >> 4) == RootDirectoryType &&
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tmp[offset + 0x23] == ProDOSEntryLength &&
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tmp[offset + 0x24] == ProDOSEntriesPerBlock)
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{
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Array.Copy(tmp, offset, rootDirectoryKeyBlock, 0, 0x200);
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APMFromHDDOnCD = true;
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break;
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}
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}
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}
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ushort prePointer = BitConverter.ToUInt16(rootDirectoryKeyBlock, 0);
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DicConsole.DebugWriteLine("ProDOS plugin", "prePointer = {0}", prePointer);
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if(prePointer != 0)
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return false;
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byte storage_type = (byte)((rootDirectoryKeyBlock[0x04] & ProDOSStorageTypeMask) >> 4);
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DicConsole.DebugWriteLine("ProDOS plugin", "storage_type = {0}", storage_type);
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if(storage_type != RootDirectoryType)
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return false;
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byte entry_length = rootDirectoryKeyBlock[0x23];
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DicConsole.DebugWriteLine("ProDOS plugin", "entry_length = {0}", entry_length);
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if(entry_length != ProDOSEntryLength)
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return false;
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byte entries_per_block = rootDirectoryKeyBlock[0x24];
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DicConsole.DebugWriteLine("ProDOS plugin", "entries_per_block = {0}", entries_per_block);
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if(entries_per_block != ProDOSEntriesPerBlock)
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return false;
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ushort bit_map_pointer = BitConverter.ToUInt16(rootDirectoryKeyBlock, 0x27);
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DicConsole.DebugWriteLine("ProDOS plugin", "bit_map_pointer = {0}", bit_map_pointer);
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if(bit_map_pointer > partition.End)
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return false;
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ushort total_blocks = BitConverter.ToUInt16(rootDirectoryKeyBlock, 0x29);
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if(APMFromHDDOnCD)
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total_blocks /= 4;
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DicConsole.DebugWriteLine("ProDOS plugin", "{0} <= ({1} - {2} + 1)? {3}", total_blocks, partition.End, partition.Start, total_blocks <= (partition.End - partition.Start + 1));
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return total_blocks <= (partition.End - partition.Start + 1);
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}
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public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, Partition partition, out string information)
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{
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StringBuilder sbInformation = new StringBuilder();
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// Blocks 0 and 1 are boot code
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byte[] rootDirectoryKeyBlockBytes = imagePlugin.ReadSector(2 + partition.Start);
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bool APMFromHDDOnCD = false;
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if(imagePlugin.GetSectorSize() == 2352 || imagePlugin.GetSectorSize() == 2448 || imagePlugin.GetSectorSize() == 2048)
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{
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byte[] tmp = imagePlugin.ReadSectors(partition.Start, 2);
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foreach(int offset in new[] { 0, 0x200, 0x400, 0x600, 0x800, 0xA00 })
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{
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if(BitConverter.ToUInt16(tmp, offset) == 0 &&
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(byte)((tmp[offset + 0x04] & ProDOSStorageTypeMask) >> 4) == RootDirectoryType &&
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tmp[offset + 0x23] == ProDOSEntryLength &&
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tmp[offset + 0x24] == ProDOSEntriesPerBlock)
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{
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Array.Copy(tmp, offset, rootDirectoryKeyBlockBytes, 0, 0x200);
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APMFromHDDOnCD = true;
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break;
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}
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}
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}
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ProDOSRootDirectoryKeyBlock rootDirectoryKeyBlock = new ProDOSRootDirectoryKeyBlock();
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rootDirectoryKeyBlock.header = new ProDOSRootDirectoryHeader();
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byte[] temporal;
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int year, month, day, hour, minute;
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ushort temp_timestamp_left, temp_timestamp_right;
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uint temp_timestamp;
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rootDirectoryKeyBlock.zero = BitConverter.ToUInt16(rootDirectoryKeyBlockBytes, 0x00);
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rootDirectoryKeyBlock.next_pointer = BitConverter.ToUInt16(rootDirectoryKeyBlockBytes, 0x02);
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rootDirectoryKeyBlock.header.storage_type = (byte)((rootDirectoryKeyBlockBytes[0x04] & ProDOSStorageTypeMask) >> 4);
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rootDirectoryKeyBlock.header.name_length = (byte)(rootDirectoryKeyBlockBytes[0x04] & ProDOSNameLengthMask);
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temporal = new byte[rootDirectoryKeyBlock.header.name_length];
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Array.Copy(rootDirectoryKeyBlockBytes, 0x05, temporal, 0, rootDirectoryKeyBlock.header.name_length);
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rootDirectoryKeyBlock.header.volume_name = CurrentEncoding.GetString(temporal);
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rootDirectoryKeyBlock.header.reserved = BitConverter.ToUInt64(rootDirectoryKeyBlockBytes, 0x14);
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temp_timestamp_left = BitConverter.ToUInt16(rootDirectoryKeyBlockBytes, 0x1C);
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temp_timestamp_right = BitConverter.ToUInt16(rootDirectoryKeyBlockBytes, 0x1E);
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bool dateCorrect;
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try
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{
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temp_timestamp = (uint)((temp_timestamp_left << 16) + temp_timestamp_right);
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year = (int)((temp_timestamp & ProDOSYearMask) >> 25);
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month = (int)((temp_timestamp & ProDOSMonthMask) >> 21);
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day = (int)((temp_timestamp & ProDOSDayMask) >> 16);
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hour = (int)((temp_timestamp & ProDOSHourMask) >> 8);
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minute = (int)(temp_timestamp & ProDOSMinuteMask);
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year += 1900;
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if(year < 1940)
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year += 100;
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DicConsole.DebugWriteLine("ProDOS plugin", "temp_timestamp_left = 0x{0:X4}", temp_timestamp_left);
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DicConsole.DebugWriteLine("ProDOS plugin", "temp_timestamp_right = 0x{0:X4}", temp_timestamp_right);
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DicConsole.DebugWriteLine("ProDOS plugin", "temp_timestamp = 0x{0:X8}", temp_timestamp);
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DicConsole.DebugWriteLine("ProDOS plugin", "Datetime field year {0}, month {1}, day {2}, hour {3}, minute {4}.", year, month, day, hour, minute);
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rootDirectoryKeyBlock.header.creation_time = new DateTime(year, month, day, hour, minute, 0);
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dateCorrect = true;
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}
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catch(ArgumentOutOfRangeException)
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{
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dateCorrect = false;
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}
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rootDirectoryKeyBlock.header.version = rootDirectoryKeyBlockBytes[0x20];
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rootDirectoryKeyBlock.header.min_version = rootDirectoryKeyBlockBytes[0x21];
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rootDirectoryKeyBlock.header.access = rootDirectoryKeyBlockBytes[0x22];
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rootDirectoryKeyBlock.header.entry_length = rootDirectoryKeyBlockBytes[0x23];
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rootDirectoryKeyBlock.header.entries_per_block = rootDirectoryKeyBlockBytes[0x24];
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rootDirectoryKeyBlock.header.file_count = BitConverter.ToUInt16(rootDirectoryKeyBlockBytes, 0x25);
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rootDirectoryKeyBlock.header.bit_map_pointer = BitConverter.ToUInt16(rootDirectoryKeyBlockBytes, 0x27);
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rootDirectoryKeyBlock.header.total_blocks = BitConverter.ToUInt16(rootDirectoryKeyBlockBytes, 0x29);
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if(APMFromHDDOnCD)
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sbInformation.AppendLine("ProDOS uses 512 bytes/sector while devices uses 2048 bytes/sector.").AppendLine();
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if(rootDirectoryKeyBlock.header.version != ProDOSVersion1 || rootDirectoryKeyBlock.header.min_version != ProDOSVersion1)
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{
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sbInformation.AppendLine("Warning! Detected unknown ProDOS version ProDOS filesystem.");
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sbInformation.AppendLine("All of the following information may be incorrect");
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}
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if(rootDirectoryKeyBlock.header.version == ProDOSVersion1)
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sbInformation.AppendLine("ProDOS version 1 used to create this volume.");
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else
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sbInformation.AppendFormat("Unknown ProDOS version with field {0} used to create this volume.", rootDirectoryKeyBlock.header.version).AppendLine();
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if(rootDirectoryKeyBlock.header.min_version == ProDOSVersion1)
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sbInformation.AppendLine("ProDOS version 1 at least required for reading this volume.");
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else
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sbInformation.AppendFormat("Unknown ProDOS version with field {0} is at least required for reading this volume.", rootDirectoryKeyBlock.header.min_version).AppendLine();
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sbInformation.AppendFormat("Volume name is {0}", rootDirectoryKeyBlock.header.volume_name).AppendLine();
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if(dateCorrect)
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sbInformation.AppendFormat("Volume created on {0}", rootDirectoryKeyBlock.header.creation_time).AppendLine();
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sbInformation.AppendFormat("{0} bytes per directory entry", rootDirectoryKeyBlock.header.entry_length).AppendLine();
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sbInformation.AppendFormat("{0} entries per directory block", rootDirectoryKeyBlock.header.entries_per_block).AppendLine();
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sbInformation.AppendFormat("{0} files in root directory", rootDirectoryKeyBlock.header.file_count).AppendLine();
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sbInformation.AppendFormat("{0} blocks in volume", rootDirectoryKeyBlock.header.total_blocks).AppendLine();
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sbInformation.AppendFormat("Bitmap starts at block {0}", rootDirectoryKeyBlock.header.bit_map_pointer).AppendLine();
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if((rootDirectoryKeyBlock.header.access & ProDOSReadAttribute) == ProDOSReadAttribute)
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sbInformation.AppendLine("Volume can be read");
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if((rootDirectoryKeyBlock.header.access & ProDOSWriteAttribute) == ProDOSWriteAttribute)
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sbInformation.AppendLine("Volume can be written");
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if((rootDirectoryKeyBlock.header.access & ProDOSRenameAttribute) == ProDOSRenameAttribute)
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sbInformation.AppendLine("Volume can be renamed");
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if((rootDirectoryKeyBlock.header.access & ProDOSDestroyAttribute) == ProDOSDestroyAttribute)
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sbInformation.AppendLine("Volume can be destroyed");
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if((rootDirectoryKeyBlock.header.access & ProDOSBackupAttribute) == ProDOSBackupAttribute)
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sbInformation.AppendLine("Volume must be backed up");
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if((rootDirectoryKeyBlock.header.access & ProDOSReservedAttributeMask) != 0)
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DicConsole.DebugWriteLine("ProDOS plugin", "Reserved attributes are set: {0:X2}", rootDirectoryKeyBlock.header.access);
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information = sbInformation.ToString();
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xmlFSType = new Schemas.FileSystemType();
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xmlFSType.VolumeName = rootDirectoryKeyBlock.header.volume_name;
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if(dateCorrect)
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{
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xmlFSType.CreationDate = rootDirectoryKeyBlock.header.creation_time;
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xmlFSType.CreationDateSpecified = true;
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}
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xmlFSType.Files = rootDirectoryKeyBlock.header.file_count;
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xmlFSType.FilesSpecified = true;
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xmlFSType.Clusters = rootDirectoryKeyBlock.header.total_blocks;
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xmlFSType.ClusterSize = (int)(((partition.End - partition.Start) + 1) * imagePlugin.ImageInfo.sectorSize / (ulong)xmlFSType.Clusters);
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xmlFSType.Type = "ProDOS";
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return;
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}
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public override Errno Mount()
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{
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return Errno.NotImplemented;
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}
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public override Errno Mount(bool debug)
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{
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return Errno.NotImplemented;
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}
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public override Errno Unmount()
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{
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return Errno.NotImplemented;
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}
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public override Errno MapBlock(string path, long fileBlock, ref long deviceBlock)
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{
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return Errno.NotImplemented;
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}
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public override Errno GetAttributes(string path, ref FileAttributes attributes)
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{
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return Errno.NotImplemented;
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}
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public override Errno ListXAttr(string path, ref List<string> xattrs)
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{
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return Errno.NotImplemented;
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}
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public override Errno GetXattr(string path, string xattr, ref byte[] buf)
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{
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return Errno.NotImplemented;
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}
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public override Errno Read(string path, long offset, long size, ref byte[] buf)
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{
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return Errno.NotImplemented;
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}
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public override Errno ReadDir(string path, ref List<string> contents)
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{
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return Errno.NotImplemented;
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}
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public override Errno StatFs(ref FileSystemInfo stat)
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{
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return Errno.NotImplemented;
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}
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public override Errno Stat(string path, ref FileEntryInfo stat)
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{
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return Errno.NotImplemented;
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}
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public override Errno ReadLink(string path, ref string dest)
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{
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return Errno.NotImplemented;
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}
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/// <summary>
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/// ProDOS directory entry, decoded structure
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/// </summary>
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struct ProDOSEntry
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{
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/// <summary>
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/// Type of file pointed by this entry
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/// Offset 0x00, mask 0xF0
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/// </summary>
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public byte storage_type;
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/// <summary>
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/// Length of name_length pascal string
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/// Offset 0x00, mask 0x0F
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/// </summary>
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public byte name_length;
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/// <summary>
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/// Pascal string of file name
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/// Offset 0x01, 15 bytes
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/// </summary>
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public string file_name;
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/// <summary>
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/// Descriptor of internal structure of the file
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/// Offset 0x10, 1 byte
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/// </summary>
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public byte file_type;
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/// <summary>
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/// Block address of master index block for tree files.
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/// Block address of index block for sapling files.
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/// Block address of block for seedling files.
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/// Offset 0x11, 2 bytes
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/// </summary>
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public ushort key_pointer;
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/// <summary>
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/// Blocks used by file or directory, including index blocks.
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/// Offset 0x13, 2 bytes
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/// </summary>
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public ushort blocks_used;
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/// <summary>
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/// Size of file in bytes
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/// Offset 0x15, 3 bytes
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/// </summary>
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public uint EOF;
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/// <summary>
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/// File creation datetime
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/// Offset 0x18, 4 bytes
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/// </summary>
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public DateTime creation_time;
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/// <summary>
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/// Version of ProDOS that created this file
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/// Offset 0x1C, 1 byte
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/// </summary>
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public byte version;
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/// <summary>
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/// Minimum version of ProDOS needed to access this file
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/// Offset 0x1D, 1 byte
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/// </summary>
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public byte min_version;
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/// <summary>
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/// File permissions
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/// Offset 0x1E, 1 byte
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/// </summary>
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public byte access;
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/// <summary>
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/// General purpose field to store additional information about file format
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/// Offset 0x1F, 2 bytes
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/// </summary>
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public ushort aux_type;
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/// <summary>
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/// File last modification date time
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/// Offset 0x21, 4 bytes
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/// </summary>
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public DateTime last_mod;
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/// <summary>
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/// Block address pointer to key block of the directory containing this entry
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/// Offset 0x25, 2 bytes
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/// </summary>
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public ushort header_pointer;
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}
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struct ProDOSRootDirectoryHeader
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{
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/// <summary>
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/// Constant 0x0F
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/// Offset 0x04, mask 0xF0
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/// </summary>
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public byte storage_type;
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/// <summary>
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/// Length of volume_name pascal string
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/// Offset 0x04, mask 0x0F
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/// </summary>
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public byte name_length;
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/// <summary>
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/// The name of the volume.
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/// Offset 0x05, 15 bytes
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/// </summary>
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public string volume_name;
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/// <summary>
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/// Reserved for future expansion
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/// Offset 0x14, 8 bytes
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/// </summary>
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public ulong reserved;
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/// <summary>
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/// Creation time of the volume
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/// Offset 0x1C, 4 bytes
|
|
/// </summary>
|
|
public DateTime creation_time;
|
|
/// <summary>
|
|
/// Version number of the volume format
|
|
/// Offset 0x20, 1 byte
|
|
/// </summary>
|
|
public byte version;
|
|
/// <summary>
|
|
/// Reserved for future use
|
|
/// Offset 0x21, 1 byte
|
|
/// </summary>
|
|
public byte min_version;
|
|
/// <summary>
|
|
/// Permissions for the volume
|
|
/// Offset 0x22, 1 byte
|
|
/// </summary>
|
|
public byte access;
|
|
/// <summary>
|
|
/// Length of an entry in this directory
|
|
/// Const 0x27
|
|
/// Offset 0x23, 1 byte
|
|
/// </summary>
|
|
public byte entry_length;
|
|
/// <summary>
|
|
/// Number of entries per block
|
|
/// Const 0x0D
|
|
/// Offset 0x24, 1 byte
|
|
/// </summary>
|
|
public byte entries_per_block;
|
|
/// <summary>
|
|
/// Number of active files in this directory
|
|
/// Offset 0x25, 2 bytes
|
|
/// </summary>
|
|
public ushort file_count;
|
|
/// <summary>
|
|
/// Block address of the first block of the volume's bitmap,
|
|
/// one for every 4096 blocks or fraction
|
|
/// Offset 0x27, 2 bytes
|
|
/// </summary>
|
|
public ushort bit_map_pointer;
|
|
/// <summary>
|
|
/// Total number of blocks in the volume
|
|
/// Offset 0x29, 2 bytes
|
|
/// </summary>
|
|
public ushort total_blocks;
|
|
}
|
|
|
|
struct ProDOSDirectoryHeader
|
|
{
|
|
/// <summary>
|
|
/// Constant 0x0E
|
|
/// Offset 0x04, mask 0xF0
|
|
/// </summary>
|
|
public byte storage_type;
|
|
/// <summary>
|
|
/// Length of volume_name pascal string
|
|
/// Offset 0x04, mask 0x0F
|
|
/// </summary>
|
|
public byte name_length;
|
|
/// <summary>
|
|
/// The name of the directory.
|
|
/// Offset 0x05, 15 bytes
|
|
/// </summary>
|
|
public string directory_name;
|
|
/// <summary>
|
|
/// Reserved for future expansion
|
|
/// Offset 0x14, 8 bytes
|
|
/// </summary>
|
|
public ulong reserved;
|
|
/// <summary>
|
|
/// Creation time of the volume
|
|
/// Offset 0x1C, 4 bytes
|
|
/// </summary>
|
|
public DateTime creation_time;
|
|
/// <summary>
|
|
/// Version number of the volume format
|
|
/// Offset 0x20, 1 byte
|
|
/// </summary>
|
|
public byte version;
|
|
/// <summary>
|
|
/// Reserved for future use
|
|
/// Offset 0x21, 1 byte
|
|
/// </summary>
|
|
public byte min_version;
|
|
/// <summary>
|
|
/// Permissions for the volume
|
|
/// Offset 0x22, 1 byte
|
|
/// </summary>
|
|
public byte access;
|
|
/// <summary>
|
|
/// Length of an entry in this directory
|
|
/// Const 0x27
|
|
/// Offset 0x23, 1 byte
|
|
/// </summary>
|
|
public byte entry_length;
|
|
/// <summary>
|
|
/// Number of entries per block
|
|
/// Const 0x0D
|
|
/// Offset 0x24, 1 byte
|
|
/// </summary>
|
|
public byte entries_per_block;
|
|
/// <summary>
|
|
/// Number of active files in this directory
|
|
/// Offset 0x25, 2 bytes
|
|
/// </summary>
|
|
public ushort file_count;
|
|
/// <summary>
|
|
/// Block address of parent directory block that contains this entry
|
|
/// Offset 0x27, 2 bytes
|
|
/// </summary>
|
|
public ushort parent_pointer;
|
|
/// <summary>
|
|
/// Entry number within the block indicated in parent_pointer
|
|
/// Offset 0x29, 1 byte
|
|
/// </summary>
|
|
public byte parent_entry_number;
|
|
/// <summary>
|
|
/// Length of the entry that holds this directory, in the parent entry
|
|
/// Const 0x27
|
|
/// Offset 0x2A, 1 byte
|
|
/// </summary>
|
|
public byte parent_entry_length;
|
|
}
|
|
|
|
struct ProDOSDirectoryKeyBlock
|
|
{
|
|
/// <summary>
|
|
/// Always 0
|
|
/// Offset 0x00, 2 bytes
|
|
/// </summary>
|
|
public ushort zero;
|
|
/// <summary>
|
|
/// Pointer to next directory block, 0 if last
|
|
/// Offset 0x02, 2 bytes
|
|
/// </summary>
|
|
public ushort next_pointer;
|
|
/// <summary>
|
|
/// Directory header
|
|
/// Offset 0x04, 39 bytes
|
|
/// </summary>
|
|
public ProDOSDirectoryHeader header;
|
|
/// <summary>
|
|
/// Directory entries
|
|
/// Offset 0x2F, 39 bytes each, 12 entries
|
|
/// </summary>
|
|
public ProDOSEntry[] entries;
|
|
}
|
|
|
|
struct ProDOSRootDirectoryKeyBlock
|
|
{
|
|
/// <summary>
|
|
/// Always 0
|
|
/// Offset 0x00, 2 bytes
|
|
/// </summary>
|
|
public ushort zero;
|
|
/// <summary>
|
|
/// Pointer to next directory block, 0 if last
|
|
/// Offset 0x02, 2 bytes
|
|
/// </summary>
|
|
public ushort next_pointer;
|
|
/// <summary>
|
|
/// Directory header
|
|
/// Offset 0x04, 39 bytes
|
|
/// </summary>
|
|
public ProDOSRootDirectoryHeader header;
|
|
/// <summary>
|
|
/// Directory entries
|
|
/// Offset 0x2F, 39 bytes each, 12 entries
|
|
/// </summary>
|
|
public ProDOSEntry[] entries;
|
|
}
|
|
|
|
struct ProDOSDirectoryBlock
|
|
{
|
|
/// <summary>
|
|
/// Pointer to previous directory block
|
|
/// Offset 0x00, 2 bytes
|
|
/// </summary>
|
|
public ushort zero;
|
|
/// <summary>
|
|
/// Pointer to next directory block, 0 if last
|
|
/// Offset 0x02, 2 bytes
|
|
/// </summary>
|
|
public ushort next_pointer;
|
|
/// <summary>
|
|
/// Directory entries
|
|
/// Offset 0x2F, 39 bytes each, 13 entries
|
|
/// </summary>
|
|
public ProDOSEntry[] entries;
|
|
}
|
|
|
|
struct ProDOSIndexBlock
|
|
{
|
|
/// <summary>
|
|
/// Up to 256 pointers to blocks, 0 to indicate the block is sparsed (non-allocated)
|
|
/// </summary>
|
|
public ushort[] block_pointer;
|
|
}
|
|
|
|
struct ProDOSMasterIndexBlock
|
|
{
|
|
/// <summary>
|
|
/// Up to 128 pointers to index blocks
|
|
/// </summary>
|
|
public ushort[] index_block_pointer;
|
|
}
|
|
}
|
|
}
|
|
|