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253 lines
10 KiB
HTML
253 lines
10 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8"/>
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<meta name="viewport" content="width=device-width, initial-scale=1"/>
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<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css"/>
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<link rel="stylesheet" href="/main.css"/>
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<title>Simple Edits - SourceGen Tutorial</title>
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</head>
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<body>
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<div id="masthead">
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<!-- START: /masthead-incl.html -->
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<!--<div class="masthead-title" style="background-image: url('images/screenshot-mainwin.png');">-->
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<div class="masthead-title">
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6502bench
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</div>
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<!-- END: /masthead-incl.html -->
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</div>
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<div id="topnav">
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<!-- START: /topnav-incl.html active:#topnav-sgtutorial -->
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<!-- top navigation bar contents -->
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<nav>
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<a id="topnav-home" href="/">HOME</a>
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<a id="topnav-sgtutorial" class="active" href="/sgtutorial">SourceGen Tutorial</a>
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<a id="topnav-menuicon" href="javascript:void(0);" class="icon" onclick="toggleSidenav()">
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<i class="fa fa-bars"></i>
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</a>
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</nav>
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<script>
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// If page has no sidenav, don't show the sidenav toggle button.
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if (document.getElementById("sidenav") == undefined) {
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$("#topnav-menuicon").hide();
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}
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// Sidenav toggle function.
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//
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// Use a jQuery function to toggle the sidenav bar. The initial state
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// is undefined / inherited, so it will pop in and out as the screen
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// resizes around the "large" breakpoint.
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function toggleSidenav() {
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$("#sidenav").toggle("fast");
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}
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</script>
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<!-- END: /topnav-incl.html -->
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</div>
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<div id="sidenav">
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<!-- START: sidenav-incl.html active:#sidenav-simple-edits -->
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<!-- side navigation bar contents -->
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<ul>
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<li id="sidenav-index"><a href="./">Introduction</a></li>
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<li id="sidenav-about-disasm"><a href="about-disasm.html">About Disassembly</a></li>
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<li id="sidenav-using-sourcegen"><a href="using-sourcegen.html">Using SourceGen</a>
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<ul>
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<li id="sidenav-moving-around"><a href="moving-around.html">Moving Around</a></li>
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<li id="sidenav-simple-edits" class="active"><a href="simple-edits.html">Simple Edits</a></li>
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<li id="sidenav-labels-symbols"><a href="labels-symbols.html">Labels & Symbols</a></li>
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<li id="sidenav-editing-data"><a href="editing-data.html">Editing Data Operands</a></li>
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<li id="sidenav-generating-code"><a href="generating-code.html">Generating Code</a></li>
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</ul></li>
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<li id="sidenav-digging-deeper"><a href="digging-deeper.html">Digging Deeper</a>
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<ul>
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<li id="sidenav-string-formatting"><a href="string-formatting.html">String Formatting</a></li>
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<li id="sidenav-local-variables"><a href="local-variables.html">Local Variables</a></li>
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<li id="sidenav-inline-data"><a href="inline-data.html">Inline Data</a></li>
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<li id="sidenav-odds-ends"><a href="odds-ends.html">Odds & Ends</a></li>
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</ul></li>
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<li id="sidenav-advanced-topics"><a href="advanced-topics.html">Advanced Topics</a>
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<ul>
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<li id="sidenav-address-tables"><a href="address-tables.html">Address Tables</a></li>
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<li id="sidenav-extension-scripts"><a href="extension-scripts.html">Extension Scripts</a></li>
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<li id="sidenav-visualizations"><a href="visualizations.html">Visualizations</a></li>
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</ul></li>
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</ul>
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<!-- END: sidenav-incl.html -->
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</div>
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<div id="main">
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<h2>Simple Edits</h2>
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<div class="grid-container">
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<div class="grid-item-text">
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<p>Click the very first line of the file, which is a comment that says
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something like "6502bench SourceGen vX.Y.Z". There are three ways to
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open the comment editor:</p>
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<ol>
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<li>Select <samp>Actions > Edit Long Comment</samp> from the menu bar.</li>
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<li>Right click, and select <samp>Edit Long Comment</samp> from the
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pop-up menu. (This menu is exactly the same as the Actions menu.)</li>
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<li>Double-click the comment</li>
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</ol>
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<p>Most things in the code list will respond to a double-click.
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Double-clicking on addresses, flags, labels, operands, and comments will
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open editors for those things. Double-clicking on a value in the "bytes"
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column will open a floating hex dump viewer. This is usually the most
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convenient way to edit something: point and click.</p>
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</div>
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</div>
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<div class="grid-container">
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<div class="grid-item-image">
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<img src="images/t1-edit-long-comment.png" alt="t1-edit-long-comment"/>
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</div>
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<div class="grid-item-text">
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<p>Double-click the comment to open the editor. Type some words into the
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upper window, and note that a formatted version appears in the bottom
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window. Experiment with the maximum line width and "render in box"
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settings to see what they do. You can hit Enter to create line breaks,
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or let SourceGen wrap lines for you. When you're done, click <samp>OK</samp>.
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(Or hit <kbd class="key">Ctrl+Enter</kbd>.)</p>
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<p>When the dialog closes, you'll see your new comment in place at the
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top of the file. If you typed enough words, your comment will span
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multiple lines. You can select the comment by selecting any line in it.</p>
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</div>
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</div>
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<div class="grid-container">
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<!--<div class="grid-item-image">
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<img src="images/t1-multi-disab.png" alt="t1-multi-disab"/>
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</div>-->
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<div class="grid-item-text">
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<p>Click on the comment, then shift-click on L1014. Right-click, and look
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at the menu. Nearly all of the menu items are disabled. Most edit features
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are only enabled when a single instance of a relevant item is selected, so
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for example <samp>Edit Long Comment</samp> won't be enabled if you have an
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instruction selected.</p>
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</div>
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</div>
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<div class="grid-container">
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<div class="grid-item-image">
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<img src="images/t1-edit-note.png" alt="t1-edit-note"/>
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</div>
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<div class="grid-item-text">
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<p>Let's add a note. Click on $100E (the line with "hello!"), then
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select <samp>Actions > Edit Note</samp>. Type a few words, pick a color,
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and click <samp>OK</samp> (or hit <kbd class="key">Ctrl+Enter</kbd>).
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Your note appears in the code, and also in the
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window on the bottom left. Notes are like long comments, with three key
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differences:</p>
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<ol>
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<li>You can't pick their line width, but you can pick their color.</li>
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<li>They don't appear in generated assembly sources, making them
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useful for leaving notes to yourself as you work.</li>
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<li>They're listed in the Notes window. Double-clicking them jumps
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the selection to the note, making them useful as bookmarks.</li>
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</ol>
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</div>
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</div>
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<div class="grid-container">
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<div class="grid-item-image">
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<img src="images/t1-set-addr-1017.png" alt="t1-set-addr-1017"/>
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</div>
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<div class="grid-item-text">
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<p>It's time to do something with the code. If you look at what the code
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does you'll see that it's copying several dozen bytes from $1017
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to $2000, then jumping to $2000. It appears to be relocating the next
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part of the code before
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executing it. We want to let the disassembler know what's going on, so
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select the line at address $1017 and then
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<samp>Actions > Set Address</samp>. (Or double-click on
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"<code>1017</code>" in the <samp>Addr</samp> column.)
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In the <samp>Set Address</samp> dialog, type "<kbd>2000</kbd>", and hit Enter.)</p>
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</div>
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</div>
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<div class="grid-container">
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<div class="grid-item-image">
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<img src="images/t1-addr-chg-1017.png" alt="t1-addr-chg-1017"/>
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</div>
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<div class="grid-item-text">
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<p>Note the way the code list has changed. When you changed the address,
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the <code>JMP $2000</code> at address $1014 found a home inside
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the bounds of the file, so
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the code tracer was able to find the instructions there.</p>
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</div>
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</div>
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<div class="grid-container">
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<div class="grid-item-text">
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<p>From the menu, select <samp>Edit > Undo</samp>. Notice how
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everything reverts to the way it was. Now, select
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<samp>Edit > Redo</samp> to restore the changes. You can undo any change you
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make to the project. (The undo history is <strong>not</strong> saved in
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the project file, though, so when you exit the program the history is
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lost.)</p>
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<p>As you make alterations to the addresses, notice that, while the
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<samp>Address</samp> column changes, the <samp>Offset</samp> column does not.
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File offsets never change, which is why they're shown here and
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in the References and Notes windows. (They can, however, be distracting,
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so you'll be forgiven if you reduce the offset column width to zero.)</p>
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</div>
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</div>
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<div class="grid-container">
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<div class="grid-item-image">
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<img src="images/t1-simple-instr-edit.png" alt="t1-simple-instr-edit"/>
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</div>
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<div class="grid-item-text">
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<p>Select the line with address $2003 ("CMP #$04"), then
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<samp>Actions > Edit Operand</samp>. This allows you to pick how you want the
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operand to look. It's currently set to "Default", which for an 8-bit
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immediate argument means it's shown as a hexadecimal value. Click
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"Binary", then "OK". It now appears as a binary value.</p>
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</div>
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</div>
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<div class="grid-container">
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<div class="grid-item-image">
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<img src="images/t1-2003-done.png" alt="t1-2003-done"/>
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</div>
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<div class="grid-item-text">
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<p>On that same line, select <samp>Actions > Edit Comment</samp>. Type a short
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comment, and hit <kbd class="key">Enter</kbd>. Your comment appears
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in the "comment" column.</p>
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</div>
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</div>
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</div> <!-- #main -->
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<div id="prevnext">
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<a href="moving-around.html" class="btn-previous">« Previous</a>
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<p>Copyright 2021 faddenSoft</p>
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