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77 lines
2.0 KiB
HTML
77 lines
2.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
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<title>xAsm RSSET, RSRESET, RB, RW</title>
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<link rel="stylesheet" type="text/css" href="../style.css">
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</head>
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<body>
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<h1>RSSET, RERESET, RB, RW</h1>
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<p>The <dfn>RS</dfn> group of commands is a handy way of defining structures:</p>
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<pre> RSRESET
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str_pStuff RW 1
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str_tData RB 256
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str_bCount RB 1
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str_SIZEOF RB 0</pre>
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<p>The example defines four <a href="equ.htm">equated</a> symbols:</p>
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<table>
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<caption>Defined symbols</caption>
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<thead>
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<tr>
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<th scope="col">Name</th>
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<th scope="col">Value</th>
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</tr>
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</thead>
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<tr>
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<td>str_pStuff</td>
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<td>0</td>
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</tr>
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<tr>
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<td>str_tData</td>
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<td>2</td>
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</tr>
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<tr>
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<td>str_bCount</td>
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<td>258</td>
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</tr>
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<tr>
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<td>str_SIZEOF</td>
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<td>259</td>
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</tr>
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</table>
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<p>There are four commands in the RS group of commands:</p>
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<table>
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<caption>RS related commands</caption>
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<thead>
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<tr>
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<th scope="col">Command</th>
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<th scope="col">Meaning</th>
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</tr>
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</thead>
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<tr>
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<td>RSRESET</td>
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<td>Resets the <a href="presym.htm">_RS</a> counter to zero</td>
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</tr>
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<tr>
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<td>RSSET <i>constexpr</i></td>
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<td>Sets the <a href="presym.htm">_RS</a> counter to <i>constexpr</i></td>
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</tr>
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<tr>
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<td>RB <i>constexpr</i></td>
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<td>Sets the preceding symbol to <a href="presym.htm">_RS</a> and adds <i>constexpr</i> to _RS</td>
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</tr>
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<tr>
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<td>RW <i>constexpr</i></td>
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<td>Sets the preceding symbol to <a href="presym.htm">_RS</a> and adds <i>constexpr*2</i> to _RS</td>
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</tr>
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</table>
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<p>Note that a colon (:) following the symbol-name is not allowed. RS symbols can be exported and imported. They don't change their value during the link process.</p>
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<h1>See also:</h1>
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<ul>
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<li><a href="expr_int.htm">Integer and Boolean expressions</a>
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</ul>
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<hr>
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<p>Last updated 21 June 1997 by <a href="mailto:surfsmurf@matilde.demon.co.uk">Carsten Sorensen</a></p>
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</body>
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</html>
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