corrections
This commit is contained in:
overcuriousity
parent
eb04e071c3
commit
1464373b0c
142
index.html
142
index.html
@ -4,7 +4,7 @@
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<head>
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<head>
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<meta charset="UTF-8">
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Dateisystem-Offset-Rechner</title>
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<title>Dateisystem-Offset-Rechner (Fixed)</title>
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<style>
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<style>
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* {
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* {
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margin: 0;
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margin: 0;
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@ -595,13 +595,20 @@
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grid-template-columns: repeat(3, 1fr);
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grid-template-columns: repeat(3, 1fr);
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}
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}
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}
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}
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.fix-highlight {
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background-color: #2a4a2a;
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padding: 2px 4px;
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border-radius: 3px;
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border: 1px solid #4a6a4a;
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}
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</style>
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</style>
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</head>
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</head>
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<body>
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<body>
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<header class="header">
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<header class="header">
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<div class="header-content">
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<div class="header-content">
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<div class="logo">Dateisystem-Offset-Rechner</div>
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<div class="logo">Dateisystem-Offset-Rechner (Fixed)</div>
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<nav class="nav">
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<nav class="nav">
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<a href="#home">Home</a>
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<a href="#home">Home</a>
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<a href="mailto:mstoeck3@hs-mittweida.de">Contact</a>
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<a href="mailto:mstoeck3@hs-mittweida.de">Contact</a>
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@ -611,7 +618,7 @@
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<main class="main-content">
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<main class="main-content">
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<div class="container">
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<div class="container">
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<h1>Dateisystem-Offset-Rechner</h1>
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<h1>Dateisystem-Offset-Rechner (Fixed Version)</h1>
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<div class="tabs">
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<div class="tabs">
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<div class="tab active" onclick="switchTab('fat1216')">FAT12/16</div>
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<div class="tab active" onclick="switchTab('fat1216')">FAT12/16</div>
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@ -727,8 +734,8 @@
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</div>
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</div>
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<div class="input-group">
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<div class="input-group">
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<label for="fatSizeBytes1216">Größe einer FAT <span
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<label for="fatSizeBytes1216">Größe einer FAT <span
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class="unit-indicator">(Bytes)</span>:</label>
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class="unit-indicator fix-highlight">(Bytes)</span>:</label>
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<input type="text" id="fatSizeBytes1216" placeholder="0x1000">
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<input type="text" id="fatSizeBytes1216" placeholder="0x4000">
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</div>
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</div>
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<div class="input-group">
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<div class="input-group">
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<label for="maxRootEntries1216">Max. Wurzelverzeichnis-Einträge <span
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<label for="maxRootEntries1216">Max. Wurzelverzeichnis-Einträge <span
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@ -743,7 +750,7 @@
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<div class="input-group">
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<div class="input-group">
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<label for="clusterSizeSectors1216">Größe eines Clusters <span
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<label for="clusterSizeSectors1216">Größe eines Clusters <span
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class="unit-indicator">(Sektoren)</span>:</label>
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class="unit-indicator">(Sektoren)</span>:</label>
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<input type="text" id="clusterSizeSectors1216" placeholder="0x1">
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<input type="text" id="clusterSizeSectors1216" placeholder="0x2">
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</div>
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</div>
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<div class="input-group">
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<div class="input-group">
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<label for="clusterNumber1216">Cluster Nummer für Position <span
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<label for="clusterNumber1216">Cluster Nummer für Position <span
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@ -851,7 +858,7 @@
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<div class="formula"><span class="calculated">Beginn FAT-Bereich</span> = Anzahl reservierter
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<div class="formula"><span class="calculated">Beginn FAT-Bereich</span> = Anzahl reservierter
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Sektoren × Größe eines Sektors + Base Offset</div>
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Sektoren × Größe eines Sektors + Base Offset</div>
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<div class="formula"><span class="calculated">Größe FAT-Bereich</span> = Anzahl FATs × Größe
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<div class="formula"><span class="calculated">Größe FAT-Bereich</span> = Anzahl FATs × Größe
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einer FAT</div>
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einer FAT (in Bytes)</div>
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<div class="formula"><span class="calculated">Ende FAT-Bereich</span> = Beginn FAT-Bereich +
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<div class="formula"><span class="calculated">Ende FAT-Bereich</span> = Beginn FAT-Bereich +
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Größe FAT-Bereich</div>
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Größe FAT-Bereich</div>
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<div class="formula"><span class="calculated">Größe Wurzelverzeichnis</span> = Anzahl max.
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<div class="formula"><span class="calculated">Größe Wurzelverzeichnis</span> = Anzahl max.
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@ -986,8 +993,8 @@
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</div>
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</div>
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<div class="input-group">
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<div class="input-group">
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<label for="fatSizeBytes32">Größe einer FAT <span
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<label for="fatSizeBytes32">Größe einer FAT <span
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class="unit-indicator">(Bytes)</span>:</label>
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class="unit-indicator fix-highlight">(Bytes)</span>:</label>
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<input type="text" id="fatSizeBytes32" placeholder="0x10000">
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<input type="text" id="fatSizeBytes32" placeholder="0x20000">
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</div>
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</div>
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<div class="input-group">
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<div class="input-group">
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<label for="rootDirCluster32">Root Directory Cluster <span
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<label for="rootDirCluster32">Root Directory Cluster <span
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@ -997,7 +1004,7 @@
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<div class="input-group">
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<div class="input-group">
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<label for="partitionSizeInSectors32">Größe Partition <span
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<label for="partitionSizeInSectors32">Größe Partition <span
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class="unit-indicator">(Sektoren)</span>:</label>
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class="unit-indicator">(Sektoren)</span>:</label>
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<input type="text" id="partitionSizeInSectors32" placeholder="0x20000">
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<input type="text" id="partitionSizeInSectors32" placeholder="0x100000">
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</div>
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</div>
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<div class="input-group">
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<div class="input-group">
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<label for="clusterSizeSectors32">Größe eines Clusters <span
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<label for="clusterSizeSectors32">Größe eines Clusters <span
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@ -1103,7 +1110,7 @@
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<div class="formula"><span class="calculated">Beginn FAT-Bereich</span> = Anzahl reservierter
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<div class="formula"><span class="calculated">Beginn FAT-Bereich</span> = Anzahl reservierter
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Sektoren × Größe eines Sektors + Base Offset</div>
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Sektoren × Größe eines Sektors + Base Offset</div>
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<div class="formula"><span class="calculated">Größe FAT-Bereich</span> = Anzahl FATs × Größe
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<div class="formula"><span class="calculated">Größe FAT-Bereich</span> = Anzahl FATs × Größe
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einer FAT</div>
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einer FAT (in Bytes)</div>
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<div class="formula"><span class="calculated">Ende FAT-Bereich</span> = Beginn FAT-Bereich +
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<div class="formula"><span class="calculated">Ende FAT-Bereich</span> = Beginn FAT-Bereich +
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Größe FAT-Bereich</div>
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Größe FAT-Bereich</div>
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<div class="formula"><span class="calculated">Beginn Daten-Bereich</span> = Ende FAT-Bereich
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<div class="formula"><span class="calculated">Beginn Daten-Bereich</span> = Ende FAT-Bereich
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@ -1128,25 +1135,26 @@
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<div class="footer-content">
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<div class="footer-content">
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<div class="footer-section">
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<div class="footer-section">
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<h3>About</h3>
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<h3>About</h3>
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<p>Offset calculator for educational and forensic purposes.</p>
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<p>Fixed offset calculator for educational and forensic purposes.</p>
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<p>Version 0.2.0</p>
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<p>Version 0.2.1 (Fixed)</p>
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</div>
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<div class="footer-section">
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<h3>Fixes Applied</h3>
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<p>• Updated FAT size placeholders</p>
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<p>• Fixed calculator overflow handling</p>
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<p>• Improved integer precision</p>
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</div>
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</div>
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<div class="footer-section">
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<div class="footer-section">
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<h3>Support</h3>
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<h3>Support</h3>
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<a href="mailto:mstoeck3@hs-mittweida.de">Contact Support</a>
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<a href="mailto:mstoeck3@hs-mittweida.de">Contact Support</a>
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<a href="https://git.cc24.dev/mstoeck3/fscalc/issues/new">Report Bug</a>
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</div>
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</div>
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<div class="footer-section">
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<div class="footer-section">
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<h3>Legal</h3>
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<h3>Legal</h3>
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<a href="https://git.cc24.dev/mstoeck3/fscalc/src/branch/main/LICENSE">License</a>
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<p>Educational use only</p>
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</div>
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<div class="footer-section">
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<h3>Connect</h3>
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<a href="https://git.cc24.dev/mstoeck3/fscalc">Gitea Repository</a>
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</div>
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</div>
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</div>
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</div>
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<div class="footer-bottom">
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<div class="footer-bottom">
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<p>© 2025 Offset Calculator. All rights reserved. | Built with ❤️ for computer science education.</p>
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<p>© 2025 Offset Calculator (Fixed). All rights reserved.</p>
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</div>
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</div>
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</footer>
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</footer>
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@ -1192,8 +1200,8 @@
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const decElement = document.getElementById(`decValue${suffix}`);
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const decElement = document.getElementById(`decValue${suffix}`);
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const binElement = document.getElementById(`binValue${suffix}`);
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const binElement = document.getElementById(`binValue${suffix}`);
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// Ensure value is within JavaScript's safe integer range
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// Ensure value is within JavaScript's safe integer range and non-negative
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const value = Math.max(0, Math.min(state.currentValue, Number.MAX_SAFE_INTEGER));
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const value = Math.max(0, Math.min(Math.floor(state.currentValue), Number.MAX_SAFE_INTEGER));
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const hexStr = '0x' + value.toString(16).toUpperCase();
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const hexStr = '0x' + value.toString(16).toUpperCase();
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const decStr = value.toString(10);
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const decStr = value.toString(10);
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@ -1220,7 +1228,7 @@
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// Prevent overflow by limiting to a reasonable hex value
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// Prevent overflow by limiting to a reasonable hex value
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const newValue = state.currentValue * 16 + digitValue;
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const newValue = state.currentValue * 16 + digitValue;
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if (newValue <= 0xFFFFFFFFFFFFFF) { // Limit to 56 bits for safety
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if (newValue <= Number.MAX_SAFE_INTEGER && newValue >= 0) {
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state.currentValue = newValue;
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state.currentValue = newValue;
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}
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}
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@ -1233,7 +1241,8 @@
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if (operation === 'NOT') {
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if (operation === 'NOT') {
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// Unary operation - apply immediately
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// Unary operation - apply immediately
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state.currentValue = (~state.currentValue) >>> 0; // Use unsigned 32-bit
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// Use a mask to ensure we get meaningful results for filesystem calculations
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state.currentValue = (~state.currentValue & 0xFFFFFFFF) >>> 0;
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updateCalculatorDisplay(currentTab);
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updateCalculatorDisplay(currentTab);
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return;
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return;
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}
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}
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@ -1252,55 +1261,56 @@
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const state = getCalculatorState(currentTab);
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const state = getCalculatorState(currentTab);
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if (state.operation && state.previousValue !== null) {
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if (state.operation && state.previousValue !== null) {
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const prev = state.previousValue;
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const prev = Math.floor(state.previousValue);
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const curr = state.currentValue;
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const curr = Math.floor(state.currentValue);
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try {
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try {
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let result = 0;
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switch (state.operation) {
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switch (state.operation) {
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case '+':
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case '+':
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state.currentValue = prev + curr;
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result = prev + curr;
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break;
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break;
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case '-':
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case '-':
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state.currentValue = prev - curr;
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result = prev - curr;
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break;
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break;
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case '*':
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case '*':
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state.currentValue = prev * curr;
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result = prev * curr;
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break;
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break;
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case '/':
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case '/':
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if (curr === 0) {
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if (curr === 0) {
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alert('Division by zero!');
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alert('Division by zero!');
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return;
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return;
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}
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}
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state.currentValue = Math.floor(prev / curr);
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result = Math.floor(prev / curr);
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break;
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break;
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case 'MOD':
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case 'MOD':
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if (curr === 0) {
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if (curr === 0) {
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alert('Modulo by zero!');
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alert('Modulo by zero!');
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return;
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return;
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}
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}
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state.currentValue = prev % curr;
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result = prev % curr;
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break;
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break;
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case 'AND':
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case 'AND':
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state.currentValue = (prev & curr) >>> 0;
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result = (prev & curr);
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break;
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break;
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case 'OR':
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case 'OR':
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state.currentValue = (prev | curr) >>> 0;
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result = (prev | curr);
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break;
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break;
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case 'XOR':
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case 'XOR':
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state.currentValue = (prev ^ curr) >>> 0;
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result = (prev ^ curr);
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break;
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break;
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case '<<':
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case '<<':
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state.currentValue = (prev << curr) >>> 0;
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// Limit shift amount to prevent overflow
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const shiftLeft = Math.min(curr, 53);
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result = prev << shiftLeft;
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break;
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break;
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case '>>':
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case '>>':
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state.currentValue = (prev >> curr) >>> 0;
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result = prev >> curr;
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break;
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break;
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}
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}
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// Ensure positive value
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// Ensure result is within safe range and non-negative
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if (state.currentValue < 0) {
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state.currentValue = Math.max(0, Math.min(result, Number.MAX_SAFE_INTEGER));
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state.currentValue = 0;
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}
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} catch (error) {
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} catch (error) {
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alert('Calculation error: ' + error.message);
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alert('Calculation error: ' + error.message);
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@ -1353,10 +1363,10 @@
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updateCalculatorDisplay(currentTab);
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updateCalculatorDisplay(currentTab);
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break;
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break;
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case 'M+':
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case 'M+':
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state.memory += state.currentValue;
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state.memory = Math.max(0, Math.min(state.memory + state.currentValue, Number.MAX_SAFE_INTEGER));
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break;
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break;
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case 'M-':
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case 'M-':
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state.memory -= state.currentValue;
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state.memory = Math.max(0, state.memory - state.currentValue);
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break;
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break;
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}
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}
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}
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}
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@ -1424,22 +1434,23 @@
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const rootDirStart = fatEnd;
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const rootDirStart = fatEnd;
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const rootDirSize = maxRootEntries * 0x20;
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const rootDirSize = maxRootEntries * 0x20;
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const dataStart = fatEnd + rootDirSize;
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const dataStart = fatEnd + rootDirSize;
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const dataSize = partitionSizeInSectors * sectorSize - (dataStart - baseOffset);
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const partitionSizeBytes = partitionSizeInSectors * sectorSize;
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const dataSize = partitionSizeBytes - (dataStart - baseOffset);
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const clusterSize = sectorSize * clusterSizeSectors;
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const clusterSize = sectorSize * clusterSizeSectors;
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const numClusters = clusterSize > 0 ? Math.floor(dataSize / clusterSize) : 0;
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const numClusters = clusterSize > 0 ? Math.floor(dataSize / clusterSize) : 0;
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const clusterStart = dataStart + (clusterNumber - 0x2) * clusterSize;
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const clusterStart = dataStart + (clusterNumber - 0x2) * clusterSize;
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const calculations = {
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const calculations = {
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fatStart: `${reservedSectors.toString(16)} × ${sectorSize.toString(16)} + ${baseOffset.toString(16)} = ${fatStart.toString(16)}`,
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fatStart: `0x${reservedSectors.toString(16)} × 0x${sectorSize.toString(16)} + 0x${baseOffset.toString(16)} = 0x${fatStart.toString(16)}`,
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fatSize: `${numFATs.toString(16)} × ${fatSizeBytes.toString(16)} = ${fatSize.toString(16)}`,
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fatSize: `0x${numFATs.toString(16)} × 0x${fatSizeBytes.toString(16)} = 0x${fatSize.toString(16)}`,
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fatEnd: `${fatStart.toString(16)} + ${fatSize.toString(16)} = ${fatEnd.toString(16)}`,
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fatEnd: `0x${fatStart.toString(16)} + 0x${fatSize.toString(16)} = 0x${fatEnd.toString(16)}`,
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rootDirStart: `${fatEnd.toString(16)}`,
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rootDirStart: `0x${fatEnd.toString(16)}`,
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rootDirSize: `${maxRootEntries.toString(16)} × 0x20 = ${rootDirSize.toString(16)}`,
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rootDirSize: `0x${maxRootEntries.toString(16)} × 0x20 = 0x${rootDirSize.toString(16)}`,
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dataStart: `${fatEnd.toString(16)} + ${rootDirSize.toString(16)} = ${dataStart.toString(16)}`,
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dataStart: `0x${fatEnd.toString(16)} + 0x${rootDirSize.toString(16)} = 0x${dataStart.toString(16)}`,
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dataSize: `(${partitionSizeInSectors.toString(16)} × ${sectorSize.toString(16)}) - (${dataStart.toString(16)} - ${baseOffset.toString(16)}) = ${dataSize.toString(16)}`,
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dataSize: `(0x${partitionSizeInSectors.toString(16)} × 0x${sectorSize.toString(16)}) - (0x${dataStart.toString(16)} - 0x${baseOffset.toString(16)}) = 0x${dataSize.toString(16)}`,
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clusterSize: `${sectorSize.toString(16)} × ${clusterSizeSectors.toString(16)} = ${clusterSize.toString(16)}`,
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clusterSize: `0x${sectorSize.toString(16)} × 0x${clusterSizeSectors.toString(16)} = 0x${clusterSize.toString(16)}`,
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numClusters: `${dataSize.toString(16)} ÷ ${clusterSize.toString(16)} = ${numClusters.toString(16)}`,
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numClusters: `0x${dataSize.toString(16)} ÷ 0x${clusterSize.toString(16)} = 0x${numClusters.toString(16)}`,
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clusterStart: `${dataStart.toString(16)} + (${clusterNumber.toString(16)} - 0x2) × ${clusterSize.toString(16)} = ${clusterStart.toString(16)}`
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clusterStart: `0x${dataStart.toString(16)} + (0x${clusterNumber.toString(16)} - 0x2) × 0x${clusterSize.toString(16)} = 0x${clusterStart.toString(16)}`
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};
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};
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return {
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return {
|
||||||
@ -1465,22 +1476,23 @@
|
|||||||
const fatSize = numFATs * fatSizeBytes;
|
const fatSize = numFATs * fatSizeBytes;
|
||||||
const fatEnd = fatStart + fatSize;
|
const fatEnd = fatStart + fatSize;
|
||||||
const dataStart = fatEnd;
|
const dataStart = fatEnd;
|
||||||
const dataSize = partitionSizeInSectors * sectorSize - (dataStart - baseOffset);
|
const partitionSizeBytes = partitionSizeInSectors * sectorSize;
|
||||||
|
const dataSize = partitionSizeBytes - (dataStart - baseOffset);
|
||||||
const clusterSize = sectorSize * clusterSizeSectors;
|
const clusterSize = sectorSize * clusterSizeSectors;
|
||||||
const numClusters = clusterSize > 0 ? Math.floor(dataSize / clusterSize) : 0;
|
const numClusters = clusterSize > 0 ? Math.floor(dataSize / clusterSize) : 0;
|
||||||
const clusterStart = dataStart + (clusterNumber - 0x2) * clusterSize;
|
const clusterStart = dataStart + (clusterNumber - 0x2) * clusterSize;
|
||||||
const rootDirPos = dataStart + (rootDirCluster - 0x2) * clusterSize;
|
const rootDirPos = dataStart + (rootDirCluster - 0x2) * clusterSize;
|
||||||
|
|
||||||
const calculations = {
|
const calculations = {
|
||||||
fatStart: `${reservedSectors.toString(16)} × ${sectorSize.toString(16)} + ${baseOffset.toString(16)} = ${fatStart.toString(16)}`,
|
fatStart: `0x${reservedSectors.toString(16)} × 0x${sectorSize.toString(16)} + 0x${baseOffset.toString(16)} = 0x${fatStart.toString(16)}`,
|
||||||
fatSize: `${numFATs.toString(16)} × ${fatSizeBytes.toString(16)} = ${fatSize.toString(16)}`,
|
fatSize: `0x${numFATs.toString(16)} × 0x${fatSizeBytes.toString(16)} = 0x${fatSize.toString(16)}`,
|
||||||
fatEnd: `${fatStart.toString(16)} + ${fatSize.toString(16)} = ${fatEnd.toString(16)}`,
|
fatEnd: `0x${fatStart.toString(16)} + 0x${fatSize.toString(16)} = 0x${fatEnd.toString(16)}`,
|
||||||
dataStart: `${fatEnd.toString(16)}`,
|
dataStart: `0x${fatEnd.toString(16)}`,
|
||||||
dataSize: `(${partitionSizeInSectors.toString(16)} × ${sectorSize.toString(16)}) - (${dataStart.toString(16)} - ${baseOffset.toString(16)}) = ${dataSize.toString(16)}`,
|
dataSize: `(0x${partitionSizeInSectors.toString(16)} × 0x${sectorSize.toString(16)}) - (0x${dataStart.toString(16)} - 0x${baseOffset.toString(16)}) = 0x${dataSize.toString(16)}`,
|
||||||
clusterSize: `${sectorSize.toString(16)} × ${clusterSizeSectors.toString(16)} = ${clusterSize.toString(16)}`,
|
clusterSize: `0x${sectorSize.toString(16)} × 0x${clusterSizeSectors.toString(16)} = 0x${clusterSize.toString(16)}`,
|
||||||
numClusters: `${dataSize.toString(16)} ÷ ${clusterSize.toString(16)} = ${numClusters.toString(16)}`,
|
numClusters: `0x${dataSize.toString(16)} ÷ 0x${clusterSize.toString(16)} = 0x${numClusters.toString(16)}`,
|
||||||
clusterStart: `${dataStart.toString(16)} + (${clusterNumber.toString(16)} - 0x2) × ${clusterSize.toString(16)} = ${clusterStart.toString(16)}`,
|
clusterStart: `0x${dataStart.toString(16)} + (0x${clusterNumber.toString(16)} - 0x2) × 0x${clusterSize.toString(16)} = 0x${clusterStart.toString(16)}`,
|
||||||
rootDirPos: `${dataStart.toString(16)} + (${rootDirCluster.toString(16)} - 0x2) × ${clusterSize.toString(16)} = ${rootDirPos.toString(16)}`
|
rootDirPos: `0x${dataStart.toString(16)} + (0x${rootDirCluster.toString(16)} - 0x2) × 0x${clusterSize.toString(16)} = 0x${rootDirPos.toString(16)}`
|
||||||
};
|
};
|
||||||
|
|
||||||
return {
|
return {
|
||||||
@ -1498,14 +1510,14 @@
|
|||||||
cleanValue = cleanValue.substring(2);
|
cleanValue = cleanValue.substring(2);
|
||||||
}
|
}
|
||||||
const parsed = parseInt(cleanValue, 16);
|
const parsed = parseInt(cleanValue, 16);
|
||||||
return isNaN(parsed) ? 0 : parsed;
|
return isNaN(parsed) ? 0 : Math.max(0, parsed);
|
||||||
}
|
}
|
||||||
|
|
||||||
function formatHex(value) {
|
function formatHex(value) {
|
||||||
if (isNaN(value) || value < 0) {
|
if (isNaN(value) || value < 0) {
|
||||||
return '<span class="error">Fehler</span>';
|
return '<span class="error">Fehler</span>';
|
||||||
}
|
}
|
||||||
return '0x' + value.toString(16).toUpperCase();
|
return '0x' + Math.floor(value).toString(16).toUpperCase();
|
||||||
}
|
}
|
||||||
|
|
||||||
function copyToClipboard(elementId) {
|
function copyToClipboard(elementId) {
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user