/// <summary>
/// Identifies the drive.
/// </summary>
protected void IdentifyDrive()
{
byte drive = (byte)(((deviceHead & 0x10) != 0x10) ? 0 : 1);
byte d = (byte)('0' + drive + 1);
BinaryFormat data = new BinaryFormat(bufferData);
data.Fill(0, 0, 512);
// fixed drive and over 5Mb/sec
data.SetUShort(0x00, 0x140);
// Serial Number
data.Fill(0x0A * 2, d, 20);
data.SetByte(0x0A * 2, d);
// Firmware version
data.Fill(0x17 * 2, d, 8);
data.SetChar(0x17 * 2 + 0, '1');
data.SetChar(0x17 * 2 + 1, '.');
data.SetChar(0x17 * 2 + 2, '0');
// Model Number
data.Fill(0x1B * 2, d, 40);
data.SetChar(0x17 * 2 + 0, 'D');
data.SetChar(0x17 * 2 + 1, 'R');
data.SetChar(0x17 * 2 + 2, 'I');
data.SetChar(0x17 * 2 + 3, 'V');
data.SetChar(0x17 * 2 + 4, 'E');
data.SetByte(0x1B * 2 + 5, d);
// lba28
data.SetUInt(0x3C * 2, (uint)(driveFiles[drive].Length / 512));
commandStatus = (byte)((commandStatus | 0x08) & ~0x80); // Set DRQ (bit 3), clear BUSY (bit 7)
status = DeviceStatus.IdentifyDrive;
}
public override void MakeDirectory(string DirName)
{
//TODO: Same Entry Exist exception.
FatFileLocation location = FindEntry(new FileSystem.Find.Empty(), FatCurrentDirectoryEntry);
uint FirstCluster = AllocateFirstCluster();
var xdata = new byte[512 * SectorsPerCluster];
this.IDevice.Read(location.DirectorySector, SectorsPerCluster, xdata);
BinaryFormat directory = new BinaryFormat(xdata);
directory.SetString(Entry.DOSName + location.DirectorySectorIndex * 32, " ", 11);
directory.SetString(Entry.DOSName + location.DirectorySectorIndex * 32, DirName);
directory.SetByte(Entry.FileAttributes + location.DirectorySectorIndex * 32, (byte)0x10);
directory.SetByte(Entry.Reserved + location.DirectorySectorIndex * 32, 0);
directory.SetByte(Entry.CreationTimeFine + location.DirectorySectorIndex * 32, 0);
directory.SetUShort(Entry.CreationTime + location.DirectorySectorIndex * 32, 0);
directory.SetUShort(Entry.CreationDate + location.DirectorySectorIndex * 32, 0);
directory.SetUShort(Entry.LastAccessDate + location.DirectorySectorIndex * 32, 0);
directory.SetUShort(Entry.LastModifiedTime + location.DirectorySectorIndex * 32, 0);
directory.SetUShort(Entry.LastModifiedDate + location.DirectorySectorIndex * 32, 0);
directory.SetUShort(Entry.FirstCluster + location.DirectorySectorIndex * 32, (ushort)FirstCluster);
directory.SetUInt(Entry.FileSize + location.DirectorySectorIndex * 32, 0);
this.IDevice.Write(location.DirectorySector, SectorsPerCluster, xdata);
FatFileLocation loc = FindEntry(new FileSystem.Find.Empty(), FirstCluster);
xdata = new byte[512 * SectorsPerCluster];
this.IDevice.Read(loc.DirectorySector, SectorsPerCluster, xdata);
directory = new BinaryFormat(xdata);
for (int i = 0; i < 2; i++)
{
directory.SetString(Entry.DOSName + loc.DirectorySectorIndex * 32, " ", 11);
if (i == 0)
{
directory.SetString(Entry.DOSName + loc.DirectorySectorIndex * 32, ".");
directory.SetUShort(Entry.FirstCluster + loc.DirectorySectorIndex * 32, (ushort)FirstCluster);
}
else
{
directory.SetString(Entry.DOSName + loc.DirectorySectorIndex * 32, "..");
directory.SetUShort(Entry.FirstCluster + loc.DirectorySectorIndex * 32, (ushort)FatCurrentDirectoryEntry);
}
directory.SetByte(Entry.FileAttributes + loc.DirectorySectorIndex * 32, (byte)0x10);
directory.SetByte(Entry.Reserved + loc.DirectorySectorIndex * 32, 0);
directory.SetByte(Entry.CreationTimeFine + loc.DirectorySectorIndex * 32, 0);
directory.SetUShort(Entry.CreationTime + loc.DirectorySectorIndex * 32, 0);
directory.SetUShort(Entry.CreationDate + loc.DirectorySectorIndex * 32, 0);
directory.SetUShort(Entry.LastAccessDate + loc.DirectorySectorIndex * 32, 0);
directory.SetUShort(Entry.LastModifiedTime + loc.DirectorySectorIndex * 32, 0);
directory.SetUShort(Entry.LastModifiedDate + loc.DirectorySectorIndex * 32, 0);
directory.SetUInt(Entry.FileSize + loc.DirectorySectorIndex * 32, 0);
loc.DirectorySectorIndex += 1;
}
this.IDevice.Write(loc.DirectorySector, SectorsPerCluster, xdata);
}
/// <summary>
/// Writes the master boot block.
/// </summary>
/// <returns></returns>
public bool Write()
{
if (!diskDevice.CanWrite)
{
return(false);
}
BinaryFormat masterboot = new BinaryFormat(new byte[512]);
masterboot.SetUInt(MBR.DiskSignature, diskSignature);
masterboot.SetUShort(MBR.MBRSignature, MBRConstant.MBRSignature);
if (code != null)
{
for (uint index = 0; ((index < MBRConstant.CodeAreaSize) && (index < code.Length)); index++)
{
masterboot.SetByte(index, code[index]);
}
}
for (uint index = 0; index < MaxMBRPartitions; index++)
{
if (Partitions[index].TotalBlocks != 0)
{
uint offset = MBR.FirstPartition + (index * 16);
masterboot.SetByte(offset + PartitionRecord.Status, (byte)(Partitions[index].Bootable ? 0x80 : 0x00));
masterboot.SetByte(offset + PartitionRecord.PartitionType, Partitions[index].PartitionType);
masterboot.SetUInt(offset + PartitionRecord.LBA, Partitions[index].StartLBA);
masterboot.SetUInt(offset + PartitionRecord.Sectors, Partitions[index].TotalBlocks);
DiskGeometry diskGeometry = new DiskGeometry();
diskGeometry.GuessGeometry(diskDevice.TotalBlocks);
CHS chsStart = new CHS();
CHS chsEnd = new CHS();
chsStart.SetCHS(diskGeometry, Partitions[index].StartLBA);
chsEnd.SetCHS(diskGeometry, Partitions[index].StartLBA + Partitions[index].TotalBlocks - 1);
masterboot.SetByte(offset + PartitionRecord.FirstCRS, chsStart.Head);
masterboot.SetByte(offset + PartitionRecord.FirstCRS + 1, (byte)((chsStart.Sector & 0x3F) | ((chsStart.Cylinder >> 8) & 0x03)));
masterboot.SetByte(offset + PartitionRecord.FirstCRS + 2, (byte)(chsStart.Cylinder & 0xFF));
masterboot.SetByte(offset + PartitionRecord.LastCRS, chsEnd.Head);
masterboot.SetByte(offset + PartitionRecord.LastCRS + 1, (byte)((chsEnd.Sector & 0x3F) | ((chsEnd.Cylinder >> 8) & 0x03)));
masterboot.SetByte(offset + PartitionRecord.LastCRS + 2, (byte)(chsEnd.Cylinder & 0xFF));
}
}
diskDevice.WriteBlock(0, 1, masterboot.Data);
return(true);
}
public void Delete(uint childBlock, uint parentBlock, uint parentBlockIndex)
{
BinaryFormat entry = new BinaryFormat(partition.ReadBlock(parentBlock, 1));
entry.SetByte((parentBlockIndex * Entry.EntrySize) + Entry.DOSName, (byte)FileNameAttribute.Deleted);
partition.WriteBlock(parentBlock, 1, entry.Data);
if (!FreeClusterChain(childBlock))
{
throw new System.ArgumentException(); //throw new IOException ("Unable to free all cluster allocations in fat");
}
}
public bool Format(FATSettings fatSettings)
{
if (!partition.CanWrite)
{
return(false);
}
this.fatType = fatSettings.FatType;
bytesPerSector = 512;
totalSectors = partition.BlockCount;
sectorsPerCluster = GetSectorsPerClusterByTotalSectors(fatType, totalSectors);
nbrFats = 2;
if (fatType == FATType.FAT32)
{
reservedSectors = 32;
rootEntries = 0;
}
else
{
reservedSectors = 1;
rootEntries = 512;
}
rootDirSectors = (((rootEntries * 32) + (bytesPerSector - 1)) / bytesPerSector);
fatStart = reservedSectors;
uint val1 = totalSectors - (reservedSectors + rootDirSectors);
uint val2 = (uint)((256 * sectorsPerCluster) + nbrFats);
if (fatType == FATType.FAT32)
{
val2 = val2 / 2;
}
uint sectorsperfat = (val1 + (val2 - 1)) / val2;
BinaryFormat bootSector = new BinaryFormat(512);
bootSector.SetUInt(BootSector.JumpInstruction, 0);
bootSector.SetString(BootSector.EOMName, "MSWIN4.1");
bootSector.SetUShort(BootSector.BytesPerSector, (ushort)bytesPerSector);
bootSector.SetByte(BootSector.SectorsPerCluster, (byte)sectorsPerCluster);
bootSector.SetUShort(BootSector.ReservedSectors, (ushort)reservedSectors);
bootSector.SetByte(BootSector.FatAllocationTables, nbrFats);
bootSector.SetUShort(BootSector.MaxRootDirEntries, (ushort)rootEntries);
if (totalSectors > 0xFFFF)
{
bootSector.SetUShort(BootSector.TotalSectors, 0);
bootSector.SetUInt(BootSector.FAT32_TotalSectors, totalClusters);
}
else
{
bootSector.SetUShort(BootSector.TotalSectors, (ushort)totalSectors);
bootSector.SetUInt(BootSector.FAT32_TotalSectors, 0);
}
bootSector.SetByte(BootSector.MediaDescriptor, 0xF8);
if (fatType == FATType.FAT32)
{
bootSector.SetUShort(BootSector.SectorsPerFAT, 0);
}
else
{
bootSector.SetUShort(BootSector.SectorsPerFAT, (ushort)sectorsperfat);
}
bootSector.SetUShort(BootSector.SectorsPerTrack, 0); ////FIXME
bootSector.SetUInt(BootSector.HiddenSectors, 0);
if (fatType != FATType.FAT32)
{
bootSector.SetByte(BootSector.PhysicalDriveNbr, 0x80);
bootSector.SetByte(BootSector.ReservedCurrentHead, 0);
bootSector.SetByte(BootSector.ExtendedBootSignature, 0x29);
bootSector.SetBytes(BootSector.IDSerialNumber, fatSettings.SerialID, 0, (uint)(fatSettings.SerialID.Length <= 4 ? fatSettings.SerialID.Length : 4));
bootSector.SetString(BootSector.VolumeLabel, " "); // 12 blank spaces
bootSector.SetString(BootSector.VolumeLabel, fatSettings.VolumeLabel, (uint)(fatSettings.VolumeLabel.Length <= 12 ? fatSettings.VolumeLabel.Length : 12));
bootSector.SetUShort(BootSector.BootSectorSignature, 0x55AA);
//BootSector.OSBootCode // TODO
}
if (fatType == FATType.FAT12)
{
bootSector.SetString(BootSector.FATType, "FAT12 ");
}
else if (fatType == FATType.FAT16)
{
bootSector.SetString(BootSector.FATType, "FAT16 ");
}
else // if (type == FatType.FAT32)
{
bootSector.SetString(BootSector.FATType, "FAT32 ");
}
if (fatType == FATType.FAT32)
{
bootSector.SetUInt(BootSector.FAT32_SectorPerFAT, sectorsperfat);
bootSector.SetByte(BootSector.FAT32_Flags, 0);
bootSector.SetUShort(BootSector.FAT32_Version, 0);
bootSector.SetUInt(BootSector.FAT32_ClusterNumberOfRoot, 2);
bootSector.SetUShort(BootSector.FAT32_SectorFSInformation, 1);
bootSector.SetUShort(BootSector.FAT32_SecondBootSector, 6);
//FAT32_Reserved1
bootSector.SetByte(BootSector.FAT32_PhysicalDriveNbr, 0x80);
bootSector.SetByte(BootSector.FAT32_Reserved2, 0);
bootSector.SetByte(BootSector.FAT32_ExtendedBootSignature, 0x29);
bootSector.SetBytes(BootSector.FAT32_IDSerialNumber, fatSettings.SerialID, 0, (uint)(fatSettings.SerialID.Length <= 4 ? fatSettings.SerialID.Length : 4));
bootSector.SetString(BootSector.FAT32_VolumeLabel, " "); // 12 blank spaces
bootSector.SetString(BootSector.FAT32_VolumeLabel, fatSettings.VolumeLabel, (uint)(fatSettings.VolumeLabel.Length <= 12 ? fatSettings.VolumeLabel.Length : 12));
bootSector.SetString(BootSector.FAT32_FATType, "FAT32 ");
//BootSector.OSBootCode // TODO
}
// Write Boot Sector
partition.WriteBlock(0, 1, bootSector.Data);
// Write backup Boot Sector
if (fatType == FATType.FAT32)
{
partition.WriteBlock(0, 1, bootSector.Data); // FIXME: wrong block #
}
// create FSInfo Structure
if (fatType == FATType.FAT32)
{
BinaryFormat infoSector = new BinaryFormat(512);
infoSector.SetUInt(FSInfo.FSI_LeadSignature, 0x41615252);
//FSInfo.FSI_Reserved1
infoSector.SetUInt(FSInfo.FSI_StructureSigature, 0x61417272);
infoSector.SetUInt(FSInfo.FSI_FreeCount, 0xFFFFFFFF);
infoSector.SetUInt(FSInfo.FSI_NextFree, 0xFFFFFFFF);
//FSInfo.FSI_Reserved2
bootSector.SetUInt(FSInfo.FSI_TrailSignature, 0xAA550000);
partition.WriteBlock(1, 1, infoSector.Data);
partition.WriteBlock(7, 1, infoSector.Data);
// create 2nd sector
BinaryFormat secondSector = new BinaryFormat(512);
secondSector.SetUInt((ushort)FSInfo.FSI_TrailSignature2, 0xAA55);
partition.WriteBlock(2, 1, secondSector.Data);
partition.WriteBlock(8, 1, secondSector.Data);
}
// create fats
/// TODO: incomplete
BinaryFormat emptyFat = new BinaryFormat(512);
// clear primary & secondary fats entries
for (uint i = fatStart; i < fatStart + 1; i++) //FIXME
{
partition.WriteBlock(i, 1, emptyFat.Data);
}
// first block is special
BinaryFormat firstFat = new BinaryFormat(512);
// TODO: incomplete
partition.WriteBlock(reservedSectors, 1, emptyFat.Data);
return(ReadBootSector());
}