Package org.applecommander.device

Class ProdosBlockToTrackSectorAdapterStrategy

java.lang.Object
org.applecommander.device.ProdosBlockToTrackSectorAdapterStrategy
All Implemented Interfaces:
TrackSectorToBlockStrategy
public class ProdosBlockToTrackSectorAdapterStrategy extends Object implements TrackSectorToBlockStrategy

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final int[]
    blockInterleave
    This table contains the block offset for a particular DOS sector.
    static final int[]
    blockOffsets
    Defines the location within a block in which the DOS sector resides.

  • Constructor Summary

    Constructors
    Constructor
    Description
    ProdosBlockToTrackSectorAdapterStrategy()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    computeBlock(int track, int sector)
    Translate a track and sector reference into the proper block number.
    int
    computeOffset(int track, int sector)
    Translate a given track and sector into the proper offset into the block.
    String
    getName()
    The name is information used in various toString methods.
    int
    getSectorsPerTrack()
    Indicates the total number of sectors per track in this device.
    int
    getTotalTracks()
    Indicates the total number of tracks in this device.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • blockInterleave

      public static final int[] blockInterleave
      This table contains the block offset for a particular DOS sector.

    • blockOffsets

      public static final int[] blockOffsets
      Defines the location within a block in which the DOS sector resides. (0 = 0-255 and 1 = 256-511.)

  • Constructor Details

    • ProdosBlockToTrackSectorAdapterStrategy

      public ProdosBlockToTrackSectorAdapterStrategy()

  • Method Details

    • computeBlock

      public int computeBlock(int track, int sector)
      Description copied from interface: TrackSectorToBlockStrategy
      Translate a track and sector reference into the proper block number.
      Specified by:
      computeBlock in interface TrackSectorToBlockStrategy

    • computeOffset

      public int computeOffset(int track, int sector)
      Description copied from interface: TrackSectorToBlockStrategy
      Translate a given track and sector into the proper offset into the block. This is needed due to the fact that a ProDOS block is 512 bytes but a DOS sector is 256 bytes -- meaning two sectors fit into a block.
      Specified by:
      computeOffset in interface TrackSectorToBlockStrategy

    • getTotalTracks

      public int getTotalTracks()
      Description copied from interface: TrackSectorToBlockStrategy
      Indicates the total number of tracks in this device. The default is 50 tracks, which is the maximum number of tracks DOS will support; this method will have to be overridden for DOS.MASTER type products.
      Specified by:
      getTotalTracks in interface TrackSectorToBlockStrategy

    • getSectorsPerTrack

      public int getSectorsPerTrack()
      Description copied from interface: TrackSectorToBlockStrategy
      Indicates the total number of sectors per track in this device. The default is 32 sectors per track which is the maximum number of sectors that DOS supports. Note that we do make the assumption that the disk geometry is fixed and sectors do not vary.
      Specified by:
      getSectorsPerTrack in interface TrackSectorToBlockStrategy

    • getName

      public String getName()
      Description copied from interface: TrackSectorToBlockStrategy
      The name is information used in various toString methods. This ensures it is populated.
      Specified by:
      getName in interface TrackSectorToBlockStrategy