/// <summary>
/// Frees all sectors available for directory store
/// </summary>
public virtual void FreeSectorsOnDirectoryTrack()
{
BAMentry trk = SectorsMap[Directory.Track];
for (byte sector = Directory.Sector; sector <= diskStructure[Directory.Track]; ++sector)
{
trk.SetFlag(sector);
}
}
/// <summary>
/// Binary sectors map
/// </summary>
/// <param name="firstTrack"></param>
/// <param name="lastTrack"></param>
/// <returns></returns>
protected byte[] RawMap(byte firstTrack, byte lastTrack)
{
int nTracks = lastTrack - firstTrack + 1;
byte[] ret = new byte[nTracks * EntrySize];
for (int j = 0; j < nTracks; ++j)
{
int offset = j * EntrySize;
BAMentry be = SectorsMap[j + firstTrack - 1];
ret[offset] = be.FreeSectors;
Array.Copy(be.flags, 0, ret, offset + 1, EntrySize - 1);
}
return(ret);
}
/// <summary>
/// First free sector in track
/// </summary>
/// <param name="track"></param>
/// <returns>-1 if no sector available</returns>
public int GetAFreeSector(byte track)
{
int ret = -1;
BAMentry trk = SectorsMap[track];
if (trk.FreeSectors > 0)
{
for (int j = 0; j < diskStructure[track]; ++j)
{
if (trk.GetFlag(j))
{
ret = j;
break;
}
}
}
return(ret);
}
