Init nand2tetris

projects/01/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:
+    Mux4Way16(a=a,b=b,c=c,d=d,sel=sel[0..1],out=mux4way1);
+    Mux4Way16(a=e,b=f,c=g,d=h,sel=sel[0..1],out=mux4way2);
+    Mux16(a=mux4way1,b=mux4way2,sel=sel[2],out=out);
+}