feat: project 5 start

project-3-sequential-logic/hdl/PC.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/3/a/PC.hdl
+/**
+ * A 16-bit counter.
+ * if      reset(t): out(t+1) = 0
+ * else if load(t):  out(t+1) = in(t)
+ * else if inc(t):   out(t+1) = out(t) + 1
+ * else              out(t+1) = out(t)
+ */
+
+ /*
+ * Personal Notes
+ * 
+ * 
+ */
+CHIP PC {
+    
+    IN in[16], reset, load, inc;
+    OUT out[16];
+    
+    PARTS:
+
+    // Inc
+    Inc16(in=regOut, out=inc16Out);
+    Mux16(a=regOut, b=inc16Out, sel=inc, out=incOut);
+
+    // Load
+    Mux16(a=incOut, b=in, sel=load, out=loadOut);
+    
+    // Reset
+    Mux16(a=loadOut, b[0..15]=false, sel=reset, out=resetOut);
+    
+    
+    Register(in=resetOut, load=true , out=regOut, out=out);
+
+
+}