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105 lines
3.3 KiB
C#
105 lines
3.3 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : Commodore.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 : Commodore GCR 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 Commodore GCR 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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using System.Runtime.InteropServices;
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namespace DiscImageChef.Decoders.Floppy
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{
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/// <summary>
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/// Methods and structures for Commodore GCR floppy decoding
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/// </summary>
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public static class Commodore
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{
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/// <summary>
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/// Decoded Commodore GCR sector header
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/// </summary>
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public struct SectorHeader
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{
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/// <summary>
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/// Always 0x08
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/// </summary>
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public byte id;
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/// <summary>
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/// XOR of following fields
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/// </summary>
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public byte checksum;
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/// <summary>
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/// Sector number
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/// </summary>
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public byte sector;
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/// <summary>
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/// Track number
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/// </summary>
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public byte track;
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/// <summary>
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/// Format ID, unknown meaning
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/// </summary>
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public UInt16 format;
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/// <summary>
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/// Filled with 0x0F
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/// </summary>
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public UInt16 fill;
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}
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/// <summary>
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/// Decoded Commodore GCR sector data
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/// </summary>
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public struct SectorData
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{
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/// <summary>
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/// Always 0x07
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/// </summary>
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public byte id;
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/// <summary>
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/// User data
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/// </summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)]
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public byte data;
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/// <summary>
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/// XOR of <see cref="data"/>
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/// </summary>
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public byte checksum;
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/// <summary>
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/// Filled with 0x0F
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/// </summary>
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public UInt16 fill;
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}
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}
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}
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