
Episode 93: How Computers Work Part III - Logic Gates and Components
The Science of Everything Podcast
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How to Send a Message to a Computer Using a Decoder
A comparator is a special circuit that checks the relative value of two numbers. This is essential for implemanting conditional branches, which we need in order to have a two incomplete computer. A decoda works by decoding 32 bits into an exact combination of 32 control bits so that it will output exactly the wire necessary to activate the register that i want. In one of these memory decodes, there might be 32 input wires corresponding to a 32 bit address, and four billion different output wires corresponding to exactly which of the memory registers we want to read from. So our andgates in the dakota only have inputs from the control bits. Each gate is activated when exactly the right combination
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