Technically a 16-bit register if I&#x27;m not mistaken (but that&#x27;s just splitting hairs; it only uses 12 bits).<p>Here&#x27;s a short article on the configuration: <a href="http:&#x2F;&#x2F;www.gamefaqs.com&#x2F;snes&#x2F;916396-super-nintendo&#x2F;faqs&#x2F;5395" rel="nofollow">http:&#x2F;&#x2F;www.gamefaqs.com&#x2F;snes&#x2F;916396-super-nintendo&#x2F;faqs&#x2F;5395</a>