Separated floppy decoders by type.

2025-12-16 19:24:27 +00:00 · 2015-10-19 02:04:38 +01:00
parent d46a5ab437
commit aab90287f9
12 changed files with 1219 additions and 809 deletions
--- a/DiscImageChef.Decoders/Floppy/Commodore.cs
+++ b/DiscImageChef.Decoders/Floppy/Commodore.cs
@@ -0,0 +1,103 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : Commodore.cs
+// Version        : 1.0
+// Author(s)      : Natalia Portillo
+//
+// Component      : Commodore GCR floppy decoder
+//
+// Revision       : $Revision$
+// Last change by : $Author$
+// Date           : $Date$
+//
+// --[ Description ] ----------------------------------------------------------
+//
+// Methods and structures for Commodore GCR floppy decoding
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This program is free software: you can redistribute it and/or modify
+//     it under the terms of the GNU General Public License as
+//     published by the Free Software Foundation, either version 3 of the
+//     License, or (at your option) any later version.
+//
+//     This program is distributed in the hope that it will be useful,
+//     but WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//     GNU General Public License for more details.
+//
+//     You should have received a copy of the GNU General Public License
+//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright (C) 2011-2015 Claunia.com
+// ****************************************************************************/
+// //$Id$
+using System;
+
+namespace DiscImageChef.Decoders.Floppy
+{
+    /// <summary>
+    /// Methods and structures for Commodore GCR floppy decoding
+    /// </summary>
+    public static class Commodore
+    {
+        /// <summary>
+        /// Decoded Commodore GCR sector header
+        /// </summary>
+        public struct CommodoreSectorHeader
+        {
+            /// <summary>
+            /// Always 0x08
+            /// </summary>
+            public byte id;
+            /// <summary>
+            /// XOR of following fields
+            /// </summary>
+            public byte checksum;
+            /// <summary>
+            /// Sector number
+            /// </summary>
+            public byte sector;
+            /// <summary>
+            /// Track number
+            /// </summary>
+            public byte track;
+            /// <summary>
+            /// Format ID, unknown meaning
+            /// </summary>
+            public UInt16 format;
+            /// <summary>
+            /// Filled with 0x0F
+            /// </summary>
+            public UInt16 fill;
+        }
+
+        /// <summary>
+        /// Decoded Commodore GCR sector data
+        /// </summary>
+        public struct CommodoreSectorData
+        {
+            /// <summary>
+            /// Always 0x07
+            /// </summary>
+            public byte id;
+            /// <summary>
+            /// User data
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)]
+            public byte data;
+            /// <summary>
+            /// XOR of <see cref="data"/>
+            /// </summary>
+            public byte checksum;
+            /// <summary>
+            /// Filled with 0x0F
+            /// </summary>
+            public UInt16 fill;
+        }
+    }
+}
+