64 lines
1.5 KiB
C#
64 lines
1.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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namespace BizHawk.Emulation.Computers.Commodore64.Media
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{
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public static class G64
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{
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public static Disk Read(byte[] source)
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{
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MemoryStream mem = new MemoryStream(source);
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BinaryReader reader = new BinaryReader(mem);
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Disk result = new Disk();
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string id = new string(reader.ReadChars(8));
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if (id == @"GCR-1541")
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{
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int trackCount;
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int[] trackOffsetTable = new int[84];
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int[] trackSpeedTable = new int[84];
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reader.ReadByte(); //version
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trackCount = reader.ReadByte();
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reader.ReadInt16(); //max track size in bytes
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for (int i = 0; i < 84; i++)
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trackOffsetTable[i] = reader.ReadInt32();
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for (int i = 0; i < 84; i++)
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trackSpeedTable[i] = reader.ReadInt32();
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for (int i = 0; i < 84; i++)
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{
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if (trackOffsetTable[i] > 0)
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{
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int trackLength;
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byte[] trackData;
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Track track = new Track();
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mem.Position = trackOffsetTable[i];
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trackLength = reader.ReadInt16();
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trackData = reader.ReadBytes(trackLength);
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track.bits = trackLength * 8;
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track.data = trackData;
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track.density = trackSpeedTable[i];
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track.index = i;
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result.tracks.Add(track);
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}
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}
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}
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result.valid = (result.tracks.Count > 0);
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return result;
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}
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public static byte[] Write(Disk source)
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{
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return null;
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}
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}
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}
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