# Mux16

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## Mux16

 Hello! Please, I need a general idea on how I can implement mux16 and the rest of the multi 4way and 8way gates. Just a like a guide or an insight. every option I have tried for Mux16 has failed. The following is what I have done so far, but it resulted in comparison failure error message at line 4: // This file is part of www.nand2tetris.org // and the book "The Elements of Computing Systems" // by Nisan and Schocken, MIT Press. // File name: projects/01/Mux16.hdl /**  * 16-bit multiplexor:  * for i = 0..15 out[i] = a[i] if sel == 0  *                        b[i] if sel == 1  */ CHIP Mux16 {     IN a[16], b[16], sel;     OUT out[16];     PARTS:     // Put your code here:         Not(in=sel, out=nots);         Mux (a=a[0], b=b[0], sel=nots, out=out[0]);         Mux (a=a[1], b=b[1], sel=nots, out=out[1]);         Mux (a=a[2], b=b[2], sel=nots, out=out[2]);         Mux (a=a[3], b=b[3], sel=nots, out=out[3]);         Mux (a=a[4], b=b[4], sel=nots, out=out[4]);         Mux (a=a[5], b=b[5], sel=nots, out=out[5]);         Mux (a=a[6], b=b[6], sel=nots, out=out[6]);         Mux (a=a[7], b=b[7], sel=nots, out=out[7]);         Mux (a=a[8], b=b[8], sel=nots, out=out[8]);         Mux (a=a[9], b=b[9], sel=nots, out=out[9]);         Mux (a=a[10], b=b[10], sel=nots, out=out[10]);         Mux (a=a[11], b=b[11], sel=nots, out=out[11]);         Mux (a=a[12], b=b[12], sel=nots, out=out[12]);         Mux (a=a[13], b=b[13], sel=nots, out=out[13]);         Mux (a=a[14], b=b[14], sel=nots, out=out[14]);         Mux (a=a[15], b=b[15], sel=nots, out=out[15]);                         }
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## Re: Mux16

 Administrator So look at the compare file at line #4 (keep in mind that the column headers are line #1, so it's actually the third test you want) and look at your output. Do you see the problem?