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<p>Input a 32‑bit doubleword from an I/O port. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">port</td><td>16‑bit I/O port address. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Doubleword read from the port. </dd></dl>

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