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<p>for all subsequent enhancements to the x86 (IA-32) architecture, although many of those enhancements, such as added instructions and new registers, also brought benefits to the real mode.</p>

<p><big> History </big></p>
<p>The first x86 processor, the <a href="page.php?w=Intel_8086">Intel 8086</a>, had a 20-<a href="page.php?w=bit">bit</a> <a href="page.php?w=address_bus">address bus</a> for its <a href="page.php?w=computer_memory">memory</a>, as did its <a href="page.php?w=Intel_8088">Intel 8088</a> variant. This allowed them to access 2<sup>20</sup> <a href="page.php?w=byte">byte</a>s</p><p>
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