/// <summary>
/// Refreshes the disk configuration
/// </summary>
public void GetDiskInfo()
{
this.PhysicalTracks = 35;
this.PhysicalHeads = 1;
this.PhysicalSectors = 18;
this.PhysicalSectorSize = 256;
LSN0 lsn0 = new LSN0(ReadBytes(0, 256));
int totalSectors = lsn0.TotalSectors;
this.PhysicalTracks = lsn0.PathDescriptor.Cylinders;
this.PhysicalHeads = lsn0.PathDescriptor.Sides;
this.PhysicalSectors = lsn0.PathDescriptor.SectorsPerTrack;
if (this.PhysicalSectors == 0)
{
this.PhysicalSectors = lsn0.SectorsPerTrack;
}
if (this.PhysicalHeads == 0)
{
this.PhysicalHeads = ((lsn0.DiskFormat & 0x01) > 0) ? 2 : 1;
}
if (totalSectors == 0 || this.PhysicalSectors == 0 || this.PhysicalHeads == 0)
{
goto NotValid;
}
if (this.PhysicalTracks == 0)
{
this.PhysicalTracks = totalSectors / this.PhysicalSectors / this.PhysicalHeads;
}
if (totalSectors != this.PhysicalTracks * this.PhysicalHeads * this.PhysicalSectors)
{
goto NotValid;
}
this.IsValidImage = true;
return;
NotValid:
this.IsValidImage = false;
this.Close();
}
private void GetDiskInfo()
{
this.physicalTracks = 35;
this.physicalHeads = 1;
this.physicalSectors = 18;
this.physicalSectorSize = 256;
this.partitions = 0;
this.currentPartition = 0;
this.firstPartitonSize = 0;
this.headerLength = (int)this.Length % 256;
if (this.HeaderLength != 0)
{
goto NotValid;
}
LSN0 lsn0 = new LSN0(this.ReadSector(0, 0, 1));
int totalSectors = lsn0.DD_TOT;
if (((this.Length - (totalSectors * this.PhysicalSectorSize)) % rsdospart) == 0)
{
firstPartitonSize = totalSectors * this.PhysicalSectorSize;
partitions = (((int)this.Length - firstPartitonSize) / rsdospart) + 1;
}
else
{
if (this.Length % rsdospart != 0)
{
goto NotValid;
}
partitions = (int)this.Length / rsdospart;
}
this.isValidImage = true;
return;
NotValid:
this.isValidImage = false;
this.Close();
}
/// <summary>
/// Validate the disk's data is a valid OS9 format
/// </summary>
/// <returns>A value specifying the validation was successful or not</returns>
private bool ValidateOS9()
{
this.lsn0 = this.ReadLSN(0);
if (this.lsn0.DiskFormat == 0x82)
{
this.LogicalHeads = 1;
}
else
{
this.LogicalHeads = ((this.lsn0.DiskFormat & 0x01) > 0) ? 2 : 1;
}
this.LogicalSectors = this.lsn0.SectorsPerTrack;
this.LogicalSectorSize = this.lsn0.SectorSize;
if (this.LogicalSectorSize == 0)
{
this.LogicalSectorSize = 256;
}
if (this.lsn0.PathDescriptor.SegmentAllocationSize == 0)
{
this.lsn0.PathDescriptor.SegmentAllocationSize = 8;
}
if (this.lsn0.TotalSectors == 0 || this.LogicalSectors == 0)
{
return(false);
}
this.LogicalTracks = this.lsn0.TotalSectors / this.LogicalSectors / this.LogicalHeads;
int bitmapLSNs = (this.lsn0.MapBytes + (this.LogicalSectorSize - 1)) / this.LogicalSectorSize;
if (1 + bitmapLSNs > this.lsn0.RootDirectory)
{
return(false);
}
if (this.LogicalSectors != this.lsn0.TrackSize)
{
return(false);
}
if (this.LogicalSectors == 0)
{
return(false);
}
if (this.lsn0.TotalSectors % this.LogicalSectors > 0)
{
return(false);
}
byte[] bitmap = this.GetBitmap();
for (int i = 0; i < bitmapLSNs; i++)
{
byte b = bitmap[i / 8];
byte mask = (byte)(1 << (7 - (i % 8)));
if ((b & mask) == 0)
{
return(false);
}
}
if (this.lsn0.TotalSectors != this.LogicalTracks * this.LogicalHeads * this.LogicalSectors)
{
return(false);
}
return(true);
}
/// <summary>
/// High level format a disk
/// </summary>
public void FormatDisk()
{
// Create Empty Disk
byte fillByte = 0xe5;
byte[] buffer;
if (!(DiskImage is PhysicalDisk))
{
buffer = new byte[this.LogicalTracks * this.LogicalHeads * this.LogicalSectors * this.LogicalSectorSize].Initialize(fillByte);
this.WriteLSNs(0, buffer);
}
else
{
buffer = new byte[this.LogicalSectors * this.LogicalSectorSize].Initialize(fillByte);
FormatDiskForm fdf = new FormatDiskForm();
((PhysicalDisk)DiskImage).FormatChanged += new FormatChangedEventHandler(fdf.Update);
for (int track = 0; track < this.LogicalTracks; track++)
{
for (int head = 0; head < this.LogicalHeads; head++)
{
((PhysicalDisk)DiskImage).WriteTrack(track, head, buffer);
}
}
fdf.Close();
}
// Create LSN0
this.lsn0 = new LSN0();
this.lsn0.TotalSectors = this.LogicalTracks * this.LogicalHeads * this.LogicalSectors;
this.lsn0.TrackSize = (byte)this.LogicalSectors;
this.lsn0.MapBytes = (ushort)((this.lsn0.TotalSectors + 7) / 8);
this.lsn0.ClusterSize = 1;
this.lsn0.Owner = 0;
this.lsn0.Attributes = 0xff;
Random rnd = new Random(DateTime.Now.Second);
this.lsn0.DiskID = (ushort)rnd.Next(0xffff);
if (this.DiskImage is PartitionedVHDImage || this.DiskImage is VHDImage)
{
this.lsn0.DiskFormat = 0x82;
}
else
{
this.lsn0.DiskFormat = (byte)(0x02 + (this.LogicalHeads - 1));
}
this.lsn0.BootStrap = 0;
this.lsn0.BootStrapSize = 0;
this.lsn0.CreatedDate = DateTime.Now;
this.lsn0.VolumeName = string.Empty;
this.lsn0.SectorSize = (ushort)this.LogicalSectorSize;
this.lsn0.RootDirectory = 1 + ((this.lsn0.MapBytes + (this.LogicalSectorSize - 1)) / this.LogicalSectorSize);
this.lsn0.PathDescriptor.DeviceType = 0x01;
this.lsn0.PathDescriptor.DriveNumber = 0x00;
this.lsn0.PathDescriptor.DeviceType = 0x20;
this.lsn0.PathDescriptor.Density = 0x01;
this.lsn0.PathDescriptor.Cylinders = (ushort)this.DiskImage.PhysicalTracks;
this.lsn0.PathDescriptor.Sides = (byte)this.DiskImage.PhysicalHeads;
this.lsn0.PathDescriptor.SectorsPerTrack = (ushort)this.DiskImage.PhysicalSectors;
this.lsn0.PathDescriptor.SectorsPerTrack0 = this.lsn0.PathDescriptor.SectorsPerTrack;
this.lsn0.PathDescriptor.Interleave = (byte)this.DiskImage.Interleave;
if (this.DiskImage is PartitionedVHDImage || this.DiskImage is VHDImage)
{
this.lsn0.PathDescriptor.SegmentAllocationSize = 0x20;
}
else
{
this.lsn0.PathDescriptor.SegmentAllocationSize = 8;
}
this.WriteLSN(0, (byte[])this.lsn0);
// Create Allocation Bitmap
int bitmapBits = this.LogicalTracks * this.LogicalHeads * this.LogicalSectors;
int bitmapLSNs = ((bitmapBits / 8) + this.LogicalSectorSize - 1) / this.LogicalSectorSize;
int allocatedSectors = 1 + bitmapLSNs + 8;
byte[] bitmap = new byte[bitmapLSNs * this.LogicalSectorSize].Initialize(0xff);
for (int i = 0; i < this.lsn0.TotalSectors; i++)
{
this.DeallocateLSN(i, bitmap);
}
for (int i = 0; i < allocatedSectors; i++)
{
this.AllocateLSN(i, bitmap);
}
this.WriteLSNs(0, bitmap);
// Create root directory file descriptor
FileDescriptor rootDescriptor = new FileDescriptor(0xbf, 0, this.lsn0.PackedCreationDate, 2, 0x40, Util.CreatedDateBytes(this.lsn0.CreatedDate));
rootDescriptor.SegmentList = new FileSegment[48];
rootDescriptor.SegmentList[0] = new FileSegment(this.lsn0.RootDirectory + 1, 7);
this.WriteLSN(this.lsn0.RootDirectory, (byte[])rootDescriptor);
// Create root directory
buffer = new byte[7 * this.LogicalSectorSize];
Directory rootDirectory = new Directory();
rootDirectory.FormatType = DiskFormatType.OS9Format;
rootDirectory.Add(new DirectoryEntry("..", this.lsn0.RootDirectory));
rootDirectory.Add(new DirectoryEntry(".", this.lsn0.RootDirectory));
Array.Copy((byte[])rootDirectory, 0, buffer, 0, 0x40);
this.WriteLSNs(this.lsn0.RootDirectory + 1, buffer);
}
private bool ValidateOS9()
{
this.lsn0 = new LSN0(this.ReadLSN(0));
if (this.lsn0.DD_FMT == 0x82)
{
this.LogicalHeads = 1;
}
else
{
this.LogicalHeads = ((this.lsn0.DD_FMT & 0x01) > 0) ? 2 : 1;
}
this.LogicalSectors = this.lsn0.DD_SPT;
this.LogicalSectorSize = this.lsn0.DD_LSNSize;
if (this.LogicalSectorSize == 0)
{
this.LogicalSectorSize = 256;
}
if (this.lsn0.DD_TOT == 0 || this.LogicalSectors == 0)
{
return(false);
}
this.LogicalTracks = this.lsn0.DD_TOT / this.LogicalSectors / this.LogicalHeads;
int bitmapLSNs = (this.lsn0.DD_MAP + (this.LogicalSectorSize - 1)) / this.LogicalSectorSize;
if (1 + bitmapLSNs > this.lsn0.DD_DIR)
{
return(false);
}
if (this.LogicalSectors != this.lsn0.DD_TKS)
{
return(false);
}
if (this.LogicalSectors == 0)
{
return(false);
}
if (this.lsn0.DD_TOT % this.LogicalSectors > 0)
{
return(false);
}
byte[] bitmap = this.GetBitmap();
for (int i = 0; i < bitmapLSNs; i++)
{
byte b = bitmap[i / 8];
byte mask = (byte)(1 << (7 - (i % 8)));
if ((b & mask) == 0)
{
return(false);
}
}
if (this.lsn0.DD_TOT != this.LogicalTracks * this.LogicalHeads * this.LogicalSectors)
{
return(false);
}
return(true);
}
/// <summary>
/// Refresh the disk's configuration
/// </summary>
public void GetDiskInfo()
{
this.PhysicalTracks = 35;
this.PhysicalHeads = 1;
this.PhysicalSectors = 18;
this.PhysicalSectorSize = 256;
this.Partitions = 0;
this.ImagePartitionOffset = 0;
this.PartitionOffset = 0;
LSN0 lsn0 = new LSN0(this.ReadBytes(0, 256));
int totalSectors = lsn0.TotalSectors;
this.PhysicalTracks = lsn0.PathDescriptor.Cylinders;
this.PhysicalHeads = lsn0.PathDescriptor.Sides;
this.PhysicalSectors = lsn0.PathDescriptor.SectorsPerTrack;
if (this.PhysicalSectors == 0)
{
this.PhysicalSectors = lsn0.SectorsPerTrack;
}
if (this.PhysicalHeads == 0)
{
if (lsn0.DiskFormat == 0x82)
{
this.PhysicalHeads = 1;
}
else
{
this.PhysicalHeads = ((lsn0.DiskFormat & 0x01) > 0) ? 2 : 1;
}
}
if (totalSectors == 0 || this.PhysicalSectors == 0 || this.PhysicalHeads == 0)
{
goto NoOS9;
}
if (this.PhysicalTracks == 0)
{
this.PhysicalTracks = totalSectors / this.PhysicalSectors / this.PhysicalHeads;
}
if (totalSectors != this.PhysicalTracks * this.PhysicalHeads * this.PhysicalSectors)
{
goto NoOS9;
}
this.Partitions = 1;
this.ImagePartitionOffset = totalSectors * this.PhysicalSectorSize;
NoOS9:
if ((this.Length - this.ImagePartitionOffset) % 0x27600 != 0)
{
goto NotValid;
}
this.Partitions += (int)((this.Length - this.ImagePartitionOffset) / 0x27600);
this.PartitionOffset = 0;
this.IsValidImage = true;
return;
NotValid:
this.IsValidImage = false;
this.Close();
}
