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26 lines
516 B
Racket
26 lines
516 B
Racket
#lang br/demo/hdl
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// This file is part of www.nand2tetris.org
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// and the book "The Elements of Computing Systems"
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// by Nisan and Schocken, MIT Press.
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// File name: projects/01/Mux.hdl
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/**
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* Multiplexor:
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* out = a if sel == 0
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* b otherwise
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*/
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CHIP Mux {
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IN a, b, sel;
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OUT out;
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PARTS:
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Not(in=sel, out=sel-opposite);
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Not(in=a, out=not-a);
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Or(a=not-a, b=sel-opposite, out=maybe-a);
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Not(in=b, out=not-b);
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Or(a=not-b, b=sel, out=maybe-b);
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Or(a=maybe-a, b=b, out=out);
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}
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