http://gamesx.com/wiki/ 2010-09-10T17:49:13+09:00 http://gamesx.com/wiki/ http://gamesx.com/wiki/lib/images/favicon.ico text/html 2008-07-04T15:14:11+09:00 http://gamesx.com/wiki/doku.php?id=chips:74157&rev=1215152051&do=diff 74157 IC The 74157 is a quad 2-line to 1-line multiplexer. Basically how this works is there are two inputs ( A and B ) for every output ( Y ). There are four groups like this, with two inputs and one output each. There is one select signal for the whole chip. When the select signal is low, the output ( Y ) is the same as input A. When the select signal is high, the output Y is the same as input B. text/html 2008-07-04T14:58:36+09:00 http://gamesx.com/wiki/doku.php?id=chips:chip_pinouts&rev=1215151116&do=diff Chip Pinouts You'll come across a lot of chips if you make a habit out of modding your hardware. Here are some of the ones that you might encounter, conveniently organized for your convenience. 74 series The 74 series is a standardized set of purpose-built chips, and you'll see them from many manufacturers. There are often letters between 74 and the other digits, signifying different manufacturing methods.