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Can format an RDOS disk; however it is not really useable until some

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more information gets written to disk as part of the format process.
In particular, the &CAT command will crash as the catalog routine is
apparantly loaded in from disk (T1,S9 in DOS parlance) and then 
executed.
This commit is contained in:
Robert Greene 2002-12-09 05:46:41 +00:00
parent e10e00eb41
commit 0f95ceb8fb
1 changed files with 68 additions and 2 deletions
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70
src/com/webcodepro/applecommander/storage/RdosFormatDisk.java
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@ -41,6 +41,16 @@ import java.util.List;
* @author: Rob Greene
*/
public class RdosFormatDisk extends FormattedDisk {
/**
* The RDOS disks are structured in a different order than DOS 3.3.
* This table interpolates between the RDOS ordering and the DOS
* ordering. It appears that RDOS may use the physical sector number
* instead of the logical sector.
*/
private static final int sectorSkew[] = {
0, 7, 0x0e, 6, 0x0d, 5, 0x0c, 4,
0x0b, 3, 0x0a, 2, 9, 1, 8, 0x0f
};
/**
* Specifies the length of a file entry.
*/
@ -110,6 +120,15 @@ public class RdosFormatDisk extends FormattedDisk {
super(filename, diskImage);
}
/**
* Constructor for RdosFormatDisk.
* @param filename
* @param diskImage
*/
public RdosFormatDisk(String filename) {
super(filename, new byte[APPLE_140KB_DISK]);
}
/**
* Read an RDOS block. The sector skewing for RDOS seems to be different.
* This routine will convert the block number to a DOS track and sector,
@ -120,12 +139,25 @@ public class RdosFormatDisk extends FormattedDisk {
* itself is a 13 sector format.
*/
public byte[] readRdosBlock(int block) {
int sectorSkew[] = { 0, 7, 0x0e, 6, 0x0d, 5, 0x0c, 4,
0x0b, 3, 0x0a, 2, 9, 1, 8, 0x0f };
int track = block / 13;
int sector = sectorSkew[block % 13];
return readSector(track, sector);
}
/**
* Write an RDOS block. The sector skewing for RDOS seems to be different.
* This routine will convert the block number to a DOS track and sector,
* handling the sector change-over. The writeSector method then should
* take care of various image formats.
* <p>
* Note that sectorSkew has the full 16 sectors, even though RDOS
* itself is a 13 sector format.
*/
public void writeRdosBlock(int block, byte[] data) {
int track = block / 13;
int sector = sectorSkew[block % 13];
writeSector(track, sector, data);
}
/**
* RDOS dos not support directories.
@ -325,4 +357,38 @@ public class RdosFormatDisk extends FormattedDisk {
}
return fileData;
}
/**
* Format the disk as an RDOS disk.
* FIXME - RDOS does not "like" an AppleCommander formatted disk.
* This appears to be because the &amp;CAT command command
* reads from track 1 sector 9 (whatever RDOS block that
* would be) and executes that code for the directory.
* AppleCommander will need to either clone the code or write
* its own routine.
* @see com.webcodepro.applecommander.storage.FormattedDisk#format()
*/
public void format() {
writeBootCode();
// minor hack - ensure that AppleCommander itself recognizes the
// RDOS disk!
byte[] block = readSector(0, 0x0d);
AppleUtil.setString(block, 0xe0, "RDOS FORMATTED BY APPLECOMMANDER", 0x20);
writeSector(0, 0x0d, block);
// a hack - until real code goes here.
block = new byte[256];
block[0] = 0x60;
writeSector(1, 9, block);
// write the first directory entry
// FIXME - this should use FileEntry!
byte[] data = readRdosBlock(13);
AppleUtil.setString(data, 0x00, "RDOS 2.1 FORMAT NOBOOT", 0x18);
AppleUtil.setString(data, 0x18, "B", 0x01);
data[0x19] = 26;
AppleUtil.setWordValue(data, 0x1a, 0x1000);
AppleUtil.setWordValue(data, 0x1c, 6656);
AppleUtil.setWordValue(data, 0x1e, 0);
writeRdosBlock(13, data);
}
}