more DOS 4.1 testing

src/com/bytezone/diskbrowser/disk/AppleDiskAddress.java

@@ -40,7 +40,11 @@ public class AppleDiskAddress implements DiskAddress
   @Override
   public boolean matches (DiskAddress that)
   {
-    return that != null && this.block == that.getBlock ();
+    if (that == null)
+      return false;
+    //    if (zeroFlag != ((AppleDiskAddress) that).zeroFlag)
+    //      return false;
+    return this.block == that.getBlock ();
   }
 
   @Override

src/com/bytezone/diskbrowser/disk/DiskFactory.java

@@ -471,6 +471,7 @@ public class DiskFactory
     }
     catch (Exception e)
     {
+      e.printStackTrace ();
     }
     if (debug)
       System.out.println ("  not a DOS disk");

src/com/bytezone/diskbrowser/dos/AbstractCatalogEntry.java

@@ -64,7 +64,9 @@ abstract class AbstractCatalogEntry implements AppleFileSource
       System.out.println ("Unknown file type : " + type);
 
     name = getName ("", entryBuffer);
-    lastModified = Utility.getDateTime (entryBuffer, 0x1B);
+    if (dosDisk.getVersion () >= 0x41)
+      lastModified = Utility.getDateTime (entryBuffer, 0x1B);
+
     // CATALOG command only formats the LO byte - see Beneath Apple DOS pp4-6
     String base = String.format ("%s%s %03d ", (locked) ? "*" : " ", getFileType (),
         (entryBuffer[33] & 0xFF));

src/com/bytezone/diskbrowser/dos/CatalogEntry.java

@@ -86,7 +86,8 @@ class CatalogEntry extends AbstractCatalogEntry
           break;
         }
 
-        if (thisDA.matches (da))
+        if (thisDA.matches (da) && ((AppleDiskAddress) thisDA)
+            .zeroFlag () == ((AppleDiskAddress) da).zeroFlag ())
         {
           System.out.printf ("Next T/S list in sector %s points to itself%n", thisDA);
           break;
@@ -133,10 +134,10 @@ class CatalogEntry extends AbstractCatalogEntry
     String lengthText = length == 0 ? "" : String.format ("$%4X  %,6d", length, length);
     String message = "";
     String lockedFlag = (locked) ? "*" : " ";
+
     if (dosDisk.dosVTOCSector.dosVersion >= 0x41)
-    {
       message = lastModified.toString ().replace ('T', ' ');
-    }
+
     if (reportedSize != actualSize)
       message += "Bad size (" + reportedSize + ") ";
     if (dataSectors.size () == 0)
@@ -148,6 +149,7 @@ class CatalogEntry extends AbstractCatalogEntry
             tsSectors.size (), (dataSectors.size () - textFileGaps), message.trim ());
     if (actualSize == 0)
       text = text.substring (0, 50);
+
     return text;
   }
 }

src/com/bytezone/diskbrowser/utilities/Utility.java

@@ -72,7 +72,7 @@ public class Utility
           LocalDateTime.of (val[3] + 2000, val[5], val[4], val[2], val[1], val[0]);
       return date;
     }
-    catch (DateTimeException e)
+    catch (DateTimeException | NumberFormatException e)
     {
       return null;
     }