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 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