Separated floppy decoders by type.

2025-12-16 19:24:25 +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/Perpendicular.cs
+++ b/DiscImageChef.Decoders/Floppy/Perpendicular.cs
@@ -0,0 +1,101 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : Perpendicular.cs
+// Version        : 1.0
+// Author(s)      : Natalia Portillo
+//
+// Component      : Perpendicular MFM floppy decoder
+//
+// Revision       : $Revision$
+// Last change by : $Author$
+// Date           : $Date$
+//
+// --[ Description ] ----------------------------------------------------------
+//
+// Methods and structures for perpendicular MFM 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
+{
+    // Information from:
+    // National Semiconductor PC87332VLJ datasheet
+    // SMsC FDC37C78 datasheet
+    // Intel 82078 datasheet
+    // Intel 82077AA datasheet
+    // Toshiba TC8566AF datasheet
+    // Fujitsu MB8876A datasheet
+    // ECMA-147
+    // ECMA-100
+
+    /// <summary>
+    /// Methods and structures for perpendicular MFM floppy decoding
+    /// </summary>
+    public static class Perpendicular
+    {
+        /// <summary>
+        /// Perpendicular floppy track
+        /// </summary>
+        public struct PerpendicularFloppyTrack
+        {
+            /// <summary>
+            /// Start of track
+            /// </summary>
+            public IBMMFMTrackPreamble trackStart;
+            /// <summary>
+            /// Track sectors
+            /// </summary>
+            public PerpendicularFloppySector[] sectors;
+            /// <summary>
+            /// Undefined size
+            /// </summary>
+            public byte[] gap;
+        }
+
+        /// <summary>
+        /// Raw demodulated format for perpendicular floppies
+        /// </summary>
+        public struct PerpendicularFloppySector
+        {
+            /// <summary>
+            /// Sector address mark
+            /// </summary>
+            public IBMMFMSectorAddressMark addressMark;
+            /// <summary>
+            /// 41 bytes set to 0x4E
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 41)]
+            public byte[] innerGap;
+            /// <summary>
+            /// Sector data block
+            /// </summary>
+            public IBMMFMSectorDataBlock dataBlock;
+            /// <summary>
+            /// Variable-sized inter-sector gap, ECMA defines 83 bytes
+            /// </summary>
+            public byte[] outerGap;
+        }
+    }
+}
+