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-  <title>get_sector (D64)</title>
+  <title>set_sector (D64)</title>
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-  <pre><span class="ruby-comment cmt"># File lib/image_formats/D64.rb, line 66</span>
-<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">get_sector</span>(<span class="ruby-identifier">track_no</span>,<span class="ruby-identifier">sector_no</span>)
-    <span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">nil</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@@sectors_in_track</span>[<span class="ruby-identifier">track_no</span>].<span class="ruby-identifier">nil?</span>
-                <span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">nil</span> <span class="ruby-keyword kw">unless</span> <span class="ruby-identifier">sector_no</span>.<span class="ruby-identifier">between?</span>(<span class="ruby-value">0</span>,<span class="ruby-ivar">@@sectors_in_track</span>[<span class="ruby-identifier">track_no</span>]<span class="ruby-operator">-</span><span class="ruby-value">1</span>)
+  <pre><span class="ruby-comment cmt"># File lib/image_formats/D64.rb, line 73</span>
+<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">set_sector</span>(<span class="ruby-identifier">track_no</span>,<span class="ruby-identifier">sector_no</span>,<span class="ruby-identifier">sector_contents</span>)
+    <span class="ruby-identifier">raise</span> <span class="ruby-node">&quot;invalid track number #{track_no}&quot;</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@@sectors_in_track</span>[<span class="ruby-identifier">track_no</span>].<span class="ruby-identifier">nil?</span>
+    <span class="ruby-identifier">raise</span> <span class="ruby-node">&quot;invalid sector number #{sector_no}&quot;</span> <span class="ruby-keyword kw">unless</span> <span class="ruby-identifier">sector_no</span>.<span class="ruby-identifier">between?</span>(<span class="ruby-value">0</span>,<span class="ruby-ivar">@@sectors_in_track</span>[<span class="ruby-identifier">track_no</span>]<span class="ruby-operator">-</span><span class="ruby-value">1</span>)
+    <span class="ruby-identifier">padded_sector_contents</span>=(<span class="ruby-identifier">sector_contents</span><span class="ruby-operator">+</span>(<span class="ruby-value str">&quot;\000&quot;</span><span class="ruby-operator">*</span><span class="ruby-constant">D64_BYTES_PER_SECTOR</span>))[<span class="ruby-value">0</span>,<span class="ruby-constant">D64_BYTES_PER_SECTOR</span>]
                 <span class="ruby-identifier">start_byte</span>=<span class="ruby-ivar">@@offset_of_track</span>[<span class="ruby-identifier">track_no</span>]<span class="ruby-operator">+</span>(<span class="ruby-constant">D64_BYTES_PER_SECTOR</span><span class="ruby-operator">*</span>(<span class="ruby-identifier">sector_no</span>))    
-                <span class="ruby-identifier">file_bytes</span>[<span class="ruby-identifier">start_byte</span>,<span class="ruby-constant">D64_BYTES_PER_SECTOR</span>]
+                <span class="ruby-identifier">file_bytes</span>[<span class="ruby-identifier">start_byte</span>,<span class="ruby-constant">D64_BYTES_PER_SECTOR</span>]=<span class="ruby-identifier">padded_sector_contents</span>
 <span class="ruby-keyword kw">end</span></pre>
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