Attempt to clarify generate vs. export

Also, updated NMS links.

Asm65/OpDef.cs

@@ -2985,8 +2985,9 @@ namespace Asm65 {
         //
         // There is no universally agreed-upon set of mnemonics for these instructions.  The
         // mnemonics "XAS" and "AXS" sometimes mean one thing and sometimes another.  The
-        // reference I've chosen to use as primary is "NMOS 6510 Unintended Opcodes":
-        //   https://csdb.dk/release/?id=161035
+        // reference I've chosen to use as primary is "No More Secrets" / "NMOS 6510 Unintended
+        // Opcodes":
+        //   https://csdb.dk/release/?id=258111
         //
         // Other references:
         //   http://nesdev.com/undocumented_opcodes.txt

SourceGen/AsmGen/WpfGui/GenAndAsm.xaml

@@ -21,7 +21,7 @@ limitations under the License.
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:SourceGen.AsmGen.WpfGui"
         mc:Ignorable="d"
-        Title="Generate and Assemble"
+        Title="Generate Source Code"
         Width="800" Height="700" MinWidth="600" MinHeight="600" ResizeMode="CanResizeWithGrip"
         ShowInTaskbar="False" WindowStartupLocation="CenterOwner"
         Loaded="Window_Loaded">

SourceGen/WpfGui/Export.xaml

@@ -21,7 +21,7 @@ limitations under the License.
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:SourceGen.WpfGui"
         mc:Ignorable="d"
-        Title="Export Source"
+        Title="Export Listing"
         SizeToContent="WidthAndHeight" ResizeMode="NoResize"
         ShowInTaskbar="False" WindowStartupLocation="CenterOwner"
         Loaded="Window_Loaded">

SourceGen/WpfGui/MainWindow.xaml

@@ -120,7 +120,7 @@ limitations under the License.
                 </RoutedUICommand.InputGestures>
             </RoutedUICommand>
             <RoutedUICommand x:Key="ExitCmd" Text="Exit"/>
-            <RoutedUICommand x:Key="ExportCmd" Text="Export...">
+            <RoutedUICommand x:Key="ExportCmd" Text="Export Listing...">
                 <RoutedUICommand.InputGestures>
                     <KeyGesture>Ctrl+Shift+E</KeyGesture>
                 </RoutedUICommand.InputGestures>

docs/sgmanual/codegen.html

@@ -177,7 +177,7 @@ operations actually do useful things.  The people who did the research
 didn't always use the same mnemonic names for them, which led to a bit
 of confusion in assemblers.</p>
 <p>The most authoritative source is
-<a href="https://csdb.dk/release/download.php?id=229739"><i>NMOS 6510 Unintended Opcodes</i> (PDF)</a>.
+<a href="https://csdb.dk/release/download.php?id=317526"><i>NMOS 6510 Unintended Opcodes</i> (PDF)</a>.
 The document defines a primary mnemonic and lists common aliases for
 each operation.  SourceGen will output the primary mnemonic unless the
 target assembler doesn't handle it.</p>
@@ -378,7 +378,7 @@ the "official" and "forked" versions.</p>
 
 
 
-<h2 id="export-source">Exporting Source Code</h2>
+<h2 id="export-source">Exporting Source Listing</h2>
 <p>The "export" function takes what you see in the code list in the app
 and converts it to text or HTML.  The options you've set in the app
 settings, such as capitalization, text delimiters, pseudo-opcode names,
@@ -390,7 +390,7 @@ clipboard and pasting them into a text file, except that you have greater
 control over which columns are included.  The HTML version is augmented
 with links and (optionally) images.</p>
 
-<p>Use <samp>File &gt; Export</samp> to open the export dialog.  You have several
+<p>Use <samp>File &gt; Export Listing</samp> to open the export dialog.  You have several
 options:</p>
 <ul>
   <li><b>Include only selected lines</b>.  This allows you to choose between