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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: tools/builtIn/Register.hdl
+
+/**
+ * 16-Bit register. 
+ * If load[t-1]=1 then out[t] = in[t-1]
+ * else out does not change (out[t] = out[t-1])
+ */
+
+CHIP Register {
+
+    IN  in[16], load;
+    OUT out[16];
+
+    BUILTIN Register;
+    CLOCKED in, load;
+}