hdl and asm codes

hdl -- hardware descriptive language. 
asm -- is kind of assembly language.
both language are used to simulate hardware and software interaction via nand2tetris software suite.

nand2tetris/Project01/And.hdl

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+// 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/And.hdl
+
+/**
+ * And gate: 
+ * out = 1 if (a == 1 and b == 1)
+ *       0 otherwise
+ */
+
+CHIP And {
+    IN a, b;
+    OUT out;
+
+    PARTS:
+    // Put your code here:
+    Nand(a=a, b=b, out=nandout);
+    Not(in=nandout, out=out);
+}

nand2tetris/Project01/And16.hdl

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+// 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/And16.hdl
+
+/**
+ * 16-bit bitwise And:
+ * for i = 0..15: out[i] = (a[i] and b[i])
+ */
+
+CHIP And16 {
+    IN a[16], b[16];
+    OUT out[16];
+
+    PARTS:
+    // Put your code here:
+    And(a=a[0], b=b[0], out=out[0]);
+    And(a=a[1], b=b[1], out=out[1]);
+    And(a=a[2], b=b[2], out=out[2]);
+    And(a=a[3], b=b[3], out=out[3]);
+    And(a=a[4], b=b[4], out=out[4]);
+    And(a=a[5], b=b[5], out=out[5]);
+    And(a=a[6], b=b[6], out=out[6]);
+    And(a=a[7], b=b[7], out=out[7]);
+    And(a=a[8], b=b[8], out=out[8]);
+    And(a=a[9], b=b[9], out=out[9]);
+    And(a=a[10], b=b[10], out=out[10]);
+    And(a=a[11], b=b[11], out=out[11]);
+    And(a=a[12], b=b[12], out=out[12]);
+    And(a=a[13], b=b[13], out=out[13]);
+    And(a=a[14], b=b[14], out=out[14]);
+    And(a=a[15], b=b[15], out=out[15]);
+}

nand2tetris/Project01/DMux.hdl

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+// 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/DMux.hdl
+
+/**
+ * Demultiplexor:
+ * {a, b} = {in, 0} if sel == 0
+ *          {0, in} if sel == 1
+ */
+
+CHIP DMux {
+    IN in, sel;
+    OUT a, b;
+
+    PARTS:
+    // Put your code here:
+    Not(in=sel, out=notsel);
+    And(a=in, b=notsel, out=a);
+    And(a=in, b=sel, out=b);
+}

nand2tetris/Project01/DMux4Way.hdl

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+// 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/DMux4Way.hdl
+
+/**
+ * 4-way demultiplexor:
+ * {a, b, c, d} = {in, 0, 0, 0} if sel == 00
+ *                {0, in, 0, 0} if sel == 01
+ *                {0, 0, in, 0} if sel == 10
+ *                {0, 0, 0, in} if sel == 11
+ */
+
+CHIP DMux4Way {
+    IN in, sel[2];
+    OUT a, b, c, d;
+
+    PARTS:
+    // Put your code here:
+    DMux(in=in, sel=sel[0], a=p, b=q);
+
+    DMux(in=p, sel=sel[1], a=a, b=c);
+    DMux(in=q, sel=sel[1], a=b, b=d);
+}

nand2tetris/Project01/DMux8Way.hdl

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+// 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/DMux8Way.hdl
+
+/**
+ * 8-way demultiplexor:
+ * {a, b, c, d, e, f, g, h} = {in, 0, 0, 0, 0, 0, 0, 0} if sel == 000
+ *                            {0, in, 0, 0, 0, 0, 0, 0} if sel == 001
+ *                            etc.
+ *                            {0, 0, 0, 0, 0, 0, 0, in} if sel == 111
+ */
+
+CHIP DMux8Way {
+    IN in, sel[3];
+    OUT a, b, c, d, e, f, g, h;
+
+    PARTS:
+    // Put your code here:
+    DMux(in=in, sel=sel[0], a=m, b=n); //m-> aceg    n-> bdfh
+
+    DMux(in=n, sel=sel[1], a=o, b=p); //o-> bf 		 p-> df
+    DMux(in=m, sel=sel[1], a=q, b=r); //q-> ae 		 r->cg
+
+    DMux(in=p, sel=sel[2], a=d, b=h); 
+    DMux(in=o, sel=sel[2], a=b, b=f); 
+    DMux(in=q, sel=sel[2], a=a, b=e); 
+    DMux(in=r, sel=sel[2], a=c, b=g); 
+}

nand2tetris/Project01/Mux.hdl

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+// 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/Mux.hdl
+
+/** 
+ * Multiplexor:
+ * out = a if sel == 0
+ *       b otherwise
+ */
+
+CHIP Mux {
+    IN a, b, sel;
+    OUT out;
+
+    PARTS:
+    // Put your code here:
+    Not(in=sel, out=notsel);
+    Nand(a=a, b=notsel, out=x);
+    Nand(a=b, b=sel, out=y);
+    Nand(a=x, b=y, out=out);
+}

nand2tetris/Project01/Mux16.hdl

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+// 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:
+    Mux(a=a[0], b=b[0], sel=sel, out=out[0]);
+    Mux(a=a[1], b=b[1], sel=sel, out=out[1]);
+    Mux(a=a[2], b=b[2], sel=sel, out=out[2]);
+    Mux(a=a[3], b=b[3], sel=sel, out=out[3]);
+    Mux(a=a[4], b=b[4], sel=sel, out=out[4]);
+    Mux(a=a[5], b=b[5], sel=sel, out=out[5]);
+    Mux(a=a[6], b=b[6], sel=sel, out=out[6]);
+    Mux(a=a[7], b=b[7], sel=sel, out=out[7]);
+    Mux(a=a[8], b=b[8], sel=sel, out=out[8]);
+    Mux(a=a[9], b=b[9], sel=sel, out=out[9]);
+    Mux(a=a[10], b=b[10], sel=sel, out=out[10]);
+    Mux(a=a[11], b=b[11], sel=sel, out=out[11]);
+    Mux(a=a[12], b=b[12], sel=sel, out=out[12]);
+    Mux(a=a[13], b=b[13], sel=sel, out=out[13]);
+    Mux(a=a[14], b=b[14], sel=sel, out=out[14]);
+    Mux(a=a[15], b=b[15], sel=sel, out=out[15]);
+}

nand2tetris/Project01/Mux4Way16.hdl

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+// 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/Mux4Way16.hdl
+
+/**
+ * 4-way 16-bit multiplexor:
+ * out = a if sel == 00
+ *       b if sel == 01
+ *       c if sel == 10
+ *       d if sel == 11
+ */
+
+CHIP Mux4Way16 {
+    IN a[16], b[16], c[16], d[16], sel[2];
+    OUT out[16];
+
+    PARTS:
+    // Put your code here:
+    //important: in variable name there cannot be any number or char like _
+    //indexing is like this: 01011
+    //						 ^^^^^
+    //						 43210
+    Mux16(a=a, b=b, sel=sel[0], out=outselab);
+    Mux16(a=c, b=d, sel=sel[0], out=outselcd);
+    Mux16(a=outselab, b=outselcd, sel=sel[1], out=out);
+}

nand2tetris/Project01/Mux8Way16.hdl

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+// 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/Mux8Way16.hdl
+
+/**
+ * 8-way 16-bit multiplexor:
+ * out = a if sel == 000
+ *       b if sel == 001
+ *       etc.
+ *       h if sel == 111
+ */
+
+CHIP Mux8Way16 {
+    IN a[16], b[16], c[16], d[16],
+       e[16], f[16], g[16], h[16],
+       sel[3];
+    OUT out[16];
+
+    PARTS:
+    // Put your code here:
+    Mux16(a=a, b=b, sel=sel[0], out=outselab);
+    Mux16(a=c, b=d, sel=sel[0], out=outselcd);
+    Mux16(a=outselab, b=outselcd, sel=sel[1], out=outabcd);
+
+    Mux16(a=e, b=f, sel=sel[0], out=outselef);
+    Mux16(a=g, b=h, sel=sel[0], out=outselgh);
+    Mux16(a=outselef, b=outselgh, sel=sel[1], out=outefgh);
+
+    Mux16(a=outabcd, b=outefgh, sel=sel[2], out=out);
+}

nand2tetris/Project01/Not.hdl

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+// 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/Not.hdl
+
+/**
+ * Not gate:
+ * out = not in
+ */
+
+CHIP Not {
+    IN in;
+    OUT out;
+
+    PARTS:
+    // Put your code here:
+    Nand(a=in, b=in, out=out);
+}

nand2tetris/Project01/Not16.hdl

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+// 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/Not16.hdl
+
+/**
+ * 16-bit Not:
+ * for i=0..15: out[i] = not in[i]
+ */
+
+CHIP Not16 {
+    IN in[16];
+    OUT out[16];
+
+    PARTS:
+    // Put your code here:
+    Not(in=in[0], out=out[0]);    
+    Not(in=in[1], out=out[1]);
+    Not(in=in[2], out=out[2]);
+    Not(in=in[3], out=out[3]);
+    Not(in=in[4], out=out[4]);
+    Not(in=in[5], out=out[5]);
+    Not(in=in[6], out=out[6]);
+    Not(in=in[7], out=out[7]);
+    Not(in=in[8], out=out[8]);
+    Not(in=in[9], out=out[9]);
+    Not(in=in[10], out=out[10]);
+    Not(in=in[11], out=out[11]);
+    Not(in=in[12], out=out[12]);
+    Not(in=in[13], out=out[13]);
+    Not(in=in[14], out=out[14]);
+    Not(in=in[15], out=out[15]);
+}

nand2tetris/Project01/Or.hdl

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+// 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/Or.hdl
+
+ /**
+ * Or gate:
+ * out = 1 if (a == 1 or b == 1)
+ *       0 otherwise
+ */
+
+CHIP Or {
+    IN a, b;
+    OUT out;
+
+    PARTS:
+    // Put your code here:
+    Not(in=a, out=nota);
+    Not(in=b, out=notb);
+    Nand(a=nota, b=notb, out=out);
+
+}

nand2tetris/Project01/Or16.hdl

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+// 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/Or16.hdl
+
+/**
+ * 16-bit bitwise Or:
+ * for i = 0..15 out[i] = (a[i] or b[i])
+ */
+
+CHIP Or16 {
+    IN a[16], b[16];
+    OUT out[16];
+
+    PARTS:
+    // Put your code here:
+    Or(a=a[0], b=b[0], out=out[0]);
+    Or(a=a[1], b=b[1], out=out[1]);
+    Or(a=a[2], b=b[2], out=out[2]);
+    Or(a=a[3], b=b[3], out=out[3]);
+    Or(a=a[4], b=b[4], out=out[4]);
+    Or(a=a[5], b=b[5], out=out[5]);
+    Or(a=a[6], b=b[6], out=out[6]);
+    Or(a=a[7], b=b[7], out=out[7]);
+    Or(a=a[8], b=b[8], out=out[8]);
+    Or(a=a[9], b=b[9], out=out[9]);
+    Or(a=a[10], b=b[10], out=out[10]);
+    Or(a=a[11], b=b[11], out=out[11]);
+    Or(a=a[12], b=b[12], out=out[12]);
+    Or(a=a[13], b=b[13], out=out[13]);
+    Or(a=a[14], b=b[14], out=out[14]);
+    Or(a=a[15], b=b[15], out=out[15]);
+}

nand2tetris/Project01/Or8Way.hdl

@@ -0,0 +1,24 @@
+// 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/Or8Way.hdl
+
+/**
+ * 8-way Or: 
+ * out = (in[0] or in[1] or ... or in[7])
+ */
+
+CHIP Or8Way {
+    IN in[8];
+    OUT out;
+
+    PARTS:
+    // Put your code here:
+    Or(a=in[0], b=in[1], out=a);
+    Or(a=a, b=in[2], out=b);
+    Or(a=b, b=in[3], out=c);
+    Or(a=c, b=in[4], out=d);
+    Or(a=d, b=in[5], out=e);
+    Or(a=e, b=in[6], out=f);
+    Or(a=f, b=in[7], out=out);
+}