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102 lines
3.3 KiB
C#
102 lines
3.3 KiB
C#
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// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : Perpendicular.cs
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// Version : 1.0
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// Author(s) : Natalia Portillo
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//
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// Component : Perpendicular MFM floppy decoder
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//
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// Revision : $Revision$
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// Last change by : $Author$
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// Date : $Date$
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Methods and structures for perpendicular MFM floppy decoding
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright (C) 2011-2015 Claunia.com
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// ****************************************************************************/
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// //$Id$
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using System;
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namespace DiscImageChef.Decoders.Floppy
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{
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// Information from:
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// National Semiconductor PC87332VLJ datasheet
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// SMsC FDC37C78 datasheet
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// Intel 82078 datasheet
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// Intel 82077AA datasheet
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// Toshiba TC8566AF datasheet
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// Fujitsu MB8876A datasheet
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// ECMA-147
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// ECMA-100
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/// <summary>
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/// Methods and structures for perpendicular MFM floppy decoding
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/// </summary>
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public static class Perpendicular
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{
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/// <summary>
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/// Perpendicular floppy track
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/// </summary>
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public struct PerpendicularFloppyTrack
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{
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/// <summary>
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/// Start of track
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/// </summary>
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public IBMMFMTrackPreamble trackStart;
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/// <summary>
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/// Track sectors
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/// </summary>
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public PerpendicularFloppySector[] sectors;
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/// <summary>
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/// Undefined size
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/// </summary>
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public byte[] gap;
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}
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/// <summary>
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/// Raw demodulated format for perpendicular floppies
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/// </summary>
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public struct PerpendicularFloppySector
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{
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/// <summary>
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/// Sector address mark
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/// </summary>
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public IBMMFMSectorAddressMark addressMark;
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/// <summary>
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/// 41 bytes set to 0x4E
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/// </summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 41)]
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public byte[] innerGap;
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/// <summary>
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/// Sector data block
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/// </summary>
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public IBMMFMSectorDataBlock dataBlock;
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/// <summary>
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/// Variable-sized inter-sector gap, ECMA defines 83 bytes
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/// </summary>
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public byte[] outerGap;
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}
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}
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}
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