87 lines
3.2 KiB
Java
87 lines
3.2 KiB
Java
package com.bytezone.diskbrowser.disk;
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import com.bytezone.diskbrowser.utilities.Utility;
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// http://apple2.org.za/gswv/a2zine/Docs/DiskImage_2MG_Info.txt
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// -----------------------------------------------------------------------------------//
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public class Prefix2mg
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// -----------------------------------------------------------------------------------//
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{
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String[] creators = { "!nfc", "B2TR", "CTKG", "CdrP", "ShIm", "WOOF", "XGS!" };
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String[] images = { "Dos3.3", "Prodos", "Nibbized" };
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String prefix;
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String creator;
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int headerSize;
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int version;
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int format;
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int flags;
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int length;
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int blocks;
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int offset;
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int commentOffset;
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int commentLength;
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int creatorOffset;
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int creatorLength;
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boolean flagsLocked;
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int flagsVolume;
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// ---------------------------------------------------------------------------------//
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public Prefix2mg (byte[] buffer)
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// ---------------------------------------------------------------------------------//
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{
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prefix = new String (buffer, 0, 4);
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creator = new String (buffer, 4, 4);
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headerSize = Utility.getShort (buffer, 0x08);
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version = Utility.getShort (buffer, 0x0A);
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format = Utility.getLong (buffer, 0x0C);
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flags = Utility.getLong (buffer, 0x10);
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blocks = Utility.getLong (buffer, 0x14); // 1600
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offset = Utility.getLong (buffer, 0x18);
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length = Utility.getLong (buffer, 0x1C);
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commentOffset = Utility.getLong (buffer, 0x20);
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commentLength = Utility.getLong (buffer, 0x24);
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creatorOffset = Utility.getLong (buffer, 0x28);
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creatorLength = Utility.getLong (buffer, 0x2C);
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flagsLocked = (flags & 0x80000000) != 0;
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if ((flags & 0x0100) != 0)
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flagsVolume = flags & 0xFF;
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if (format == 0 && flagsVolume == 0)
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flagsVolume = 254;
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if (length == 0)
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length = 512 * blocks;
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// see /Asimov disks/images/gs/os/prodos16/ProDOS 16v1_3.2mg
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// System.out.println (this);
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}
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// ---------------------------------------------------------------------------------//
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@Override
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public String toString ()
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// ---------------------------------------------------------------------------------//
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{
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StringBuilder text = new StringBuilder ();
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text.append (String.format ("Prefix : %s%n", prefix));
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text.append (String.format ("Creator : %s%n", creator));
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text.append (String.format ("Header : %d%n", headerSize));
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text.append (String.format ("Version : %d%n", version));
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text.append (String.format ("Format : %02X%n", format));
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text.append (String.format ("Flags : %,d%n", flags));
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text.append (String.format ("Locked : %s%n", flagsLocked));
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text.append (String.format ("DOS Volume : %,d%n", flagsVolume));
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text.append (String.format ("Blocks : %,d%n", blocks));
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text.append (String.format ("Offset : %,d%n", offset));
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text.append (String.format ("Length : %08X (%<,d)%n", length));
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text.append (String.format ("Comment Offset : %,d%n", commentOffset));
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text.append (String.format ("Comment Length : %08X (%<,d)%n", commentLength));
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text.append (String.format ("Creator Offset : %,d%n", creatorOffset));
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text.append (String.format ("Creator Length : %08X (%<,d)", creatorLength));
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return text.toString ();
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}
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}
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