Complete first project

1_Boolean_Arithmetic/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/1/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:
+    Mux16(a=a, b=b, sel=sel[0], out=x);
+    Mux16(a=c, b=d, sel=sel[0], out=y);
+    Mux16(a=x, b=y, sel=sel[1], out=out);
+}