Re: Mux4Way16

Posted by hdllearn on May 09, 2024; 7:15am
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Mux4Way16-tp4037818p4037835.html

HIP Mux4Way16 {
    IN a[16], b[16], c[16], d[16], sel[2];
    OUT out[16];
   
    PARTS:
    ////And, Or, Not, Xor, Mux, Mux16, And16, Or16, Not16
    //// Replace this comment with your code.
   
    Not(in=sel[0], out=notsela);
    Not(in=sel[1], out=notselb);


    //00. outand7=0
    And(a=sel[1], b=sel[0], out=outand7);
    Not(in=outand7, out=notoutand7);
    And(a=notoutand7, b=notoutand7, out=out00);

    //10. outand8=1
    And(a=outand7, b=sel[1], out=outand8);
   
    ////sel=01 or sel=10
    //Good
    And(a=sel[0], b=sel[1], out=outxor1);
   
    ///sel=01
    ///And(a=outxor1, b=notselb, out=out10);
    Or(a=outxor1, b=notselb, out=out10);
    ////sel=11
    Or(a=outxor1, b=notsela, out=out11);
   

    //outa, outb, outc, outd are all good
    //sel=00
    Mux16(a=a, b=b, sel=outand7, out=outa);
    //sel=10
    Mux16(a=c, b=d, sel=outand8, out=outc);
    //sel=01
    Mux16(a=a, b=b, sel=out10, out=outb);
    //sel=11
    Mux16(a=c, b=d, sel=out11, out=outd);

    //Algo"
    //gates we have: And, And16, Or, Or16, Or8way, Not, Not16, Mux, Mux16, DMux, Nand
    //NB:Or will bitwise Or for 16 bits of 2, 16 bits.
    //We need a SWITCH to switch between a[16], b[16], c[16], d[16]
    //Therefore cannot use And16, Or16
       
    //a or b or c or d
    //Or8Way(in[0]=outand7, in[1]=outand8, in[2]=out10, in[3]=out11, out= interout);
    Or8Way(in[0]=outand7, in[1]=out11, out=interaord);
    //And(a=interout, b=outand7, )



    //Mux16(a=outa, b=outd, sel=outand7, out=finala);
    //Mux16(a=outb, b=outc, sel=out10, out=finalb);



}