public DiskGeometry(int cylinders, int heads, int sectors, SectorGeometry sectorGeometry)
{
Cylinders = cylinders;
Heads = heads;
Sectors = sectors;
SectorGeometry = sectorGeometry;
}
/// <summary>
/// Create a new, empty sector.
/// </summary>
/// <param name="geometry"></param>
/// <param name="cylinder"></param>
/// <param name="head"></param>
/// <param name="sector"></param>
public DiskSector(SectorGeometry geometry, int cylinder, int head, int sector)
{
_header = new ushort[geometry.HeaderSize];
_label = new ushort[geometry.LabelSize];
_data = new ushort[geometry.DataSize];
_cylinder = cylinder;
_head = head;
_sector = sector;
_modified = true;
}
/// <summary>
/// Create a new DiskSector populated from the specified stream.
/// </summary>
/// <param name="geometry"></param>
/// <param name="inputStream"></param>
/// <param name="cylinder"></param>
/// <param name="head"></param>
/// <param name="sector"></param>
public DiskSector(SectorGeometry geometry, Stream inputStream, int cylinder, int head, int sector)
{
//
// Read in the sector from the input stream.
//
byte[] header = new byte[geometry.HeaderSizeBytes];
byte[] label = new byte[geometry.LabelSizeBytes];
byte[] data = new byte[geometry.DataSizeBytes];
//
// Bitsavers images have an extra word in the header for some reason.
// ignore it.
// TODO: should support different formats ("correct" raw, Alto CopyDisk format, etc.)
//
inputStream.Seek(2, SeekOrigin.Current);
if (inputStream.Read(header, 0, header.Length) != header.Length)
{
throw new InvalidOperationException("Short read while reading sector header.");
}
if (inputStream.Read(label, 0, label.Length) != label.Length)
{
throw new InvalidOperationException("Short read while reading sector label.");
}
if (inputStream.Read(data, 0, data.Length) != data.Length)
{
throw new InvalidOperationException("Short read while reading sector data.");
}
_header = GetUShortArray(header);
_label = GetUShortArray(label);
_data = GetUShortArray(data);
_cylinder = cylinder;
_head = head;
_sector = sector;
_modified = false;
}
