Refactor image classes and split them to smaller files.

DiscImageChef.DiscImages/TeleDisk/Constants.cs

@@ -0,0 +1,99 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : Constants.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Disk image plugins.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Contains constants for Sydex TeleDisk disk images.
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This library is free software; you can redistribute it and/or modify
+//     it under the terms of the GNU Lesser General Public License as
+//     published by the Free Software Foundation; either version 2.1 of the
+//     License, or (at your option) any later version.
+//
+//     This library 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
+//     Lesser General Public License for more details.
+//
+//     You should have received a copy of the GNU Lesser General Public
+//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2018 Natalia Portillo
+// ****************************************************************************/
+
+namespace DiscImageChef.DiscImages
+{
+    public partial class TeleDisk
+    {
+        // "TD" as little endian uint.
+        const ushort TD_MAGIC = 0x4454;
+        // "td" as little endian uint. Means whole file is compressed (aka Advanced Compression)
+        const ushort TD_ADV_COMP_MAGIC = 0x6474;
+
+        // DataRates
+        const byte DATA_RATE_250KBPS = 0x00;
+        const byte DATA_RATE_300KBPS = 0x01;
+        const byte DATA_RATE_500KBPS = 0x02;
+
+        // TeleDisk drive types
+        const byte DRIVE_TYPE_525_HD_DD_DISK = 0x00;
+        const byte DRIVE_TYPE_525_HD         = 0x01;
+        const byte DRIVE_TYPE_525_DD         = 0x02;
+        const byte DRIVE_TYPE_35_DD          = 0x03;
+        const byte DRIVE_TYPE_35_HD          = 0x04;
+        const byte DRIVE_TYPE_8_INCH         = 0x05;
+        const byte DRIVE_TYPE_35_ED          = 0x06;
+
+        // Stepping
+        const byte STEPPING_SINGLE    = 0x00;
+        const byte STEPPING_DOUBLE    = 0x01;
+        const byte STEPPING_EVEN_ONLY = 0x02;
+        // If this bit is set, there is a comment block
+        const byte COMMENT_BLOCK_PRESENT = 0x80;
+
+        // CRC polynomial
+        const ushort TELE_DISK_CRC_POLY = 0xA097;
+
+        // Sector sizes table
+        const byte SECTOR_SIZE_128 = 0x00;
+        const byte SECTOR_SIZE_256 = 0x01;
+        const byte SECTOR_SIZE_512 = 0x02;
+        const byte SECTOR_SIZE_1K  = 0x03;
+        const byte SECTOR_SIZE_2K  = 0x04;
+        const byte SECTOR_SIZE_4K  = 0x05;
+        const byte SECTOR_SIZE_8K  = 0x06;
+
+        // Flags
+        // Address mark repeats inside same track
+        const byte FLAGS_SECTOR_DUPLICATE = 0x01;
+        // Sector gave CRC error on reading
+        const byte FLAGS_SECTOR_CRC_ERROR = 0x02;
+        // Address mark indicates deleted sector
+        const byte FLAGS_SECTOR_DELETED = 0x04;
+        // Sector skipped as FAT said it's unused
+        const byte FLAGS_SECTOR_SKIPPED = 0x10;
+        // There was an address mark, but no data following
+        const byte FLAGS_SECTOR_DATALESS = 0x20;
+        // There was data without address mark
+        const byte FLAGS_SECTOR_NO_ID = 0x40;
+
+        // Data block encodings
+        // Data is copied as is
+        const byte DATA_BLOCK_COPY = 0x00;
+        // Data is encoded as a pair of len.value uint16s
+        const byte DATA_BLOCK_PATTERN = 0x01;
+        // Data is encoded as RLE
+        const byte DATA_BLOCK_RLE = 0x02;
+
+        const int BUFSZ = 512;
+    }
+}