Generalize differences of RDOS 2.1/3.2 vs RDOS 3.3
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@ -67,15 +67,38 @@ public class RdosFormatDisk extends FormattedDisk {
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*/
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*/
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public static final int ENTRY_LENGTH = 0x20;
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public static final int ENTRY_LENGTH = 0x20;
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/**
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/**
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* Specifies the number of blocks on the disk.
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* Specifies the number of tracks on the disk.
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* RDOS apparantly only worked on 5.25" disks.
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* RDOS apparantly only worked on 5.25" disks.
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*/
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*/
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public static final int BLOCKS_ON_DISK = 455;
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public static final int TRACKS_ON_DISK = 35;
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/**
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* Number of sectors used by catalog.
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* FIXME: some sources say 10, others say 11. RDOS 3.3 may support 16.
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*/
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public static final int CATALOG_SECTORS = 10;
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/**
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/**
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* The known filetypes for a RDOS disk.
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* The known filetypes for a RDOS disk.
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*/
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*/
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public static final String[] filetypes = { "B", "A", "T" }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
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public static final String[] filetypes = { "B", "A", "T" }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
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/**
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* 13 sectors for RDOS 2.1/3.2, native sectoring (16) for RDOS 3.3
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*/
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private int SectorsPerTrack() {
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if (getImageOrder() instanceof ProdosOrder) {
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return getImageOrder().getSectorsPerTrack();
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} else {
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return 13;
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}
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}
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/**
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* 455 blocks for RDOS 2.1/3.2, 560 for RDOS 3.3
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*/
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private int BlocksOnDisk() {
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return TRACKS_ON_DISK * SectorsPerTrack();
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}
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/**
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/**
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* Use this inner interface for managing the disk usage data.
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* Use this inner interface for managing the disk usage data.
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* This off-loads format-specific implementation to the implementing class.
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* This off-loads format-specific implementation to the implementing class.
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@ -94,13 +117,13 @@ public class RdosFormatDisk extends FormattedDisk {
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private int location = -1;
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private int location = -1;
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private BitSet bitmap = null;
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private BitSet bitmap = null;
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public boolean hasNext() {
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public boolean hasNext() {
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return location == -1 || location < BLOCKS_ON_DISK - 1;
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return location == -1 || location < BlocksOnDisk() - 1;
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}
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}
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public void next() {
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public void next() {
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if (bitmap == null) {
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if (bitmap == null) {
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bitmap = new BitSet(BLOCKS_ON_DISK);
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bitmap = new BitSet(BlocksOnDisk());
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// mark all blocks as unused
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// mark all blocks as unused
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for (int b=0; b<BLOCKS_ON_DISK; b++) {
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for (int b=0; b<BlocksOnDisk(); b++) {
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bitmap.set(b);
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bitmap.set(b);
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}
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}
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// for each file, mark the blocks used
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// for each file, mark the blocks used
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@ -151,8 +174,12 @@ public class RdosFormatDisk extends FormattedDisk {
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* itself is a 13 sector format.
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* itself is a 13 sector format.
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*/
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*/
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public byte[] readRdosBlock(int block) {
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public byte[] readRdosBlock(int block) {
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int track = block / 13;
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int s = SectorsPerTrack();
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int sector = sectorSkew[block % 13];
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int track = block / s;
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int sector = block % s;
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if (s == 13) {
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sector = sectorSkew[sector];
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}
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return readSector(track, sector);
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return readSector(track, sector);
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}
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}
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@ -166,39 +193,28 @@ public class RdosFormatDisk extends FormattedDisk {
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* itself is a 13 sector format.
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* itself is a 13 sector format.
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*/
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*/
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public void writeRdosBlock(int block, byte[] data) {
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public void writeRdosBlock(int block, byte[] data) {
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int track = block / 13;
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int s = SectorsPerTrack();
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int sector = sectorSkew[block % 13];
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int track = block / s;
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int sector = block % s;
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if (s == 13) {
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sector = sectorSkew[sector];
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}
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writeSector(track, sector, data);
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writeSector(track, sector, data);
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}
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}
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/**
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* Read the block from the disk image.
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*/
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public byte[] readBlock(int block) {
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int track = block / 16;
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int sector = block % 16;
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return getImageOrder().readSector(track, sector);
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}
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/**
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* Write the block to the disk image.
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*/
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public void writeBlock(int block, byte[] data) {
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int track = block / 16;
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int sector = block % 16;
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getImageOrder().writeSector(track, sector, data);
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}
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/**
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/**
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* RDOS really does not have a disk name. Fake one.
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* RDOS really does not have a disk name. Fake one.
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*/
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*/
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public String getDiskName() {
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public String getDiskName() {
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if (getImageOrder() instanceof ProdosOrder) {
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if (SectorsPerTrack() == 13) {
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/* Use the comment/tag added in the 13->16 sector conversion */
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byte[] block = readRdosBlock(4);
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return AppleUtil.getString(block, 0xe0, 0x20);
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} else {
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/* Use the name of the OS (catalog entry zero) */
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byte[] block = readSector(1, 0x0);
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byte[] block = readSector(1, 0x0);
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return AppleUtil.getString(block, 0x0, 0x18);
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return AppleUtil.getString(block, 0x0, 0x18);
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}
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}
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byte[] block = readRdosBlock(4);
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return AppleUtil.getString(block, 0xe0, 0x20);
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}
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}
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/**
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/**
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@ -206,8 +222,8 @@ public class RdosFormatDisk extends FormattedDisk {
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*/
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*/
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public List<FileEntry> getFiles() {
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public List<FileEntry> getFiles() {
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List<FileEntry> files = new ArrayList<>();
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List<FileEntry> files = new ArrayList<>();
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for (int b=13; b<23; b++) {
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for (int b=0; b<CATALOG_SECTORS; b++) {
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byte[] data = readRdosBlock(b);
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byte[] data = readRdosBlock(b + SectorsPerTrack());
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for (int i=0; i<data.length; i+= ENTRY_LENGTH) {
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for (int i=0; i<data.length; i+= ENTRY_LENGTH) {
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byte[] entry = new byte[ENTRY_LENGTH];
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byte[] entry = new byte[ENTRY_LENGTH];
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System.arraycopy(data, i, entry, 0, entry.length);
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System.arraycopy(data, i, entry, 0, entry.length);
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@ -250,17 +266,18 @@ public class RdosFormatDisk extends FormattedDisk {
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* Identify the operating system format of this disk.
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* Identify the operating system format of this disk.
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*/
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*/
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public String getFormat() {
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public String getFormat() {
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if (getImageOrder() instanceof ProdosOrder) {
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if (SectorsPerTrack() == 13) {
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return textBundle.get("RdosFormatDisk.Rdos21"); //$NON-NLS-1$
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} else {
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return textBundle.get("RdosFormatDisk.Rdos33"); //$NON-NLS-1$
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return textBundle.get("RdosFormatDisk.Rdos33"); //$NON-NLS-1$
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}
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}
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return textBundle.get("RdosFormatDisk.Rdos21"); //$NON-NLS-1$
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}
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}
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/**
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/**
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* Return the number of free blocks.
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* Return the number of free blocks.
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*/
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*/
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public int getFreeBlocks() {
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public int getFreeBlocks() {
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return BLOCKS_ON_DISK - getUsedBlocks();
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return BlocksOnDisk() - getUsedBlocks();
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}
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}
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/**
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/**
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@ -301,7 +318,7 @@ public class RdosFormatDisk extends FormattedDisk {
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* Get the length of the bitmap.
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* Get the length of the bitmap.
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*/
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*/
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public int getBitmapLength() {
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public int getBitmapLength() {
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return BLOCKS_ON_DISK;
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return BlocksOnDisk();
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}
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}
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/**
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/**
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@ -323,7 +340,7 @@ public class RdosFormatDisk extends FormattedDisk {
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*/
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*/
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public List<DiskInformation> getDiskInformation() {
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public List<DiskInformation> getDiskInformation() {
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List<DiskInformation> list = super.getDiskInformation();
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List<DiskInformation> list = super.getDiskInformation();
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list.add(new DiskInformation(textBundle.get("TotalBlocks"), BLOCKS_ON_DISK)); //$NON-NLS-1$
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list.add(new DiskInformation(textBundle.get("TotalBlocks"), BlocksOnDisk())); //$NON-NLS-1$
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list.add(new DiskInformation(textBundle.get("FreeBlocks"), getFreeBlocks())); //$NON-NLS-1$
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list.add(new DiskInformation(textBundle.get("FreeBlocks"), getFreeBlocks())); //$NON-NLS-1$
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list.add(new DiskInformation(textBundle.get("UsedBlocks"), getUsedBlocks())); //$NON-NLS-1$
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list.add(new DiskInformation(textBundle.get("UsedBlocks"), getUsedBlocks())); //$NON-NLS-1$
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return list;
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return list;
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@ -418,12 +435,7 @@ public class RdosFormatDisk extends FormattedDisk {
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byte[] fileData = new byte[rdosEntry.getSizeInBlocks() * SECTOR_SIZE];
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byte[] fileData = new byte[rdosEntry.getSizeInBlocks() * SECTOR_SIZE];
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int offset = 0;
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int offset = 0;
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for (int blockOffset = 0; blockOffset < rdosEntry.getSizeInBlocks(); blockOffset++) {
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for (int blockOffset = 0; blockOffset < rdosEntry.getSizeInBlocks(); blockOffset++) {
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byte[] blockData;
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byte[] blockData = readRdosBlock(startingBlock + blockOffset);
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if (getImageOrder() instanceof ProdosOrder) {
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blockData = readBlock(startingBlock + blockOffset);
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} else {
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blockData = readRdosBlock(startingBlock + blockOffset);
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}
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System.arraycopy(blockData, 0, fileData, offset, blockData.length);
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System.arraycopy(blockData, 0, fileData, offset, blockData.length);
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offset+= blockData.length;
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offset+= blockData.length;
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}
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}
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