https://wiki.neogeodev.org//api.php?action=feedcontributions&feedformat=atom&user=Aje+fr 2026-05-21T19:10:15Z User contributions MediaWiki 1.40.0 https://wiki.neogeodev.org//index.php?title=NEO-257&diff=521 2011-05-07T09:49:29Z

<p>Aje fr: /* Pinout */</p> <hr /> <div>Quadruple 74HC257 2-to-1 multiplexer with common select line, making 16 switches in one chip.<br /> Used in dual slot MVS systems to select one of the two [[C ROM]] (and S ROM ?) buses.<br /> <br /> Select signal comes from one of the &quot;SLOT&quot; outputs of [[NEO-F0]] ?<br /> <br /> == Pinout ==<br /> Information provided by Channelmaniac.<br /> <br /> [[File:Neo-257_pinout.png]]<br /> <br /> *A*,B*: Inputs<br /> *Y*: Outputs<br /> *Select: Output A if LOW, B if HIGH.<br /> *Some pins marked as ground could be &quot;enable&quot; pins<br /> <br /> [[Category:Chips]]</div>

Aje fr