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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/03/a/Bit.hdl
+
+/**
+ * 1-bit register:
+ * If load[t] == 1 then out[t+1] = in[t]
+ * else out does not change (out[t+1] = out[t])
+ */
+
+CHIP Bit {
+ IN in, load;
+ OUT out;
+
+ PARTS:
+ Mux(a=fb, b=in, sel=load, out=data);
+ DFF(in=data, out=fb, out=out);
+}