<p>wikipedia has a great article documenting the ModR/M format used in x86 encoding, including a very handy table explaining how it works (in 16bit mode, too!), but it never mentions segment selectors once.</p><p><a href="https://en.wikipedia.org/wiki/ModR/M" target="_blank" rel="nofollow noopener noreferrer" translate="no"><span class="invisible">https://</span><span class="">en.wikipedia.org/wiki/ModR/M</span><span class="invisible"></span></a></p>