Init nand2tetris

projects/01/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:
+        Not(in=sel,out=notsel);
+        And16(a=a,b[0]=notsel,b[1]=notsel,b[2]=notsel,b[3]=notsel,b[4]=notsel,b[5]=notsel,b[6]=notsel,b[7]=notsel,b[8]=notsel,b[9]=notsel,b[10]=notsel,b[11]=notsel,b[12]=notsel,b[13]=notsel,b[14]=notsel,b[15]=notsel,out=outand1);
+        And16(a[0]=sel,a[1]=sel,a[2]=sel,a[3]=sel,a[4]=sel,a[5]=sel,a[6]=sel,a[7]=sel,a[8]=sel,a[9]=sel,a[10]=sel,a[11]=sel,a[12]=sel,a[13]=sel,a[14]=sel,a[15]=sel,b=b,out=outand2);
+        Or16(a=outand1,b=outand2,out=out);
+}