Re: why does the multiplexer have four select inputs in this image? 80 80

Don't ask the question in the title. Also, provide more information.

Your question is equvalent to asking "Why does this equation use 5: 5x^2 + 2x + 3 = 7?".

I'm assuming that this is for a cashe implementation? The reason why it has 4 select inputs is because it wouldn't work otherwise. If you used 3, then you're obviously missing a place where a hit could be found. Though I probably wouldn't impement it as described.

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