feat: project 5 start

project-3-sequential-logic/hdl/Bit.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/Bit.hdl
+/**
+ * 1-bit register:
+ * If load is asserted, the register's value is set to in;
+ * Otherwise, the register maintains its current value:
+ * if (load(t)) out(t+1) = in(t), else out(t+1) = out(t)
+ */
+
+ 
+CHIP Bit {
+    IN in, load;
+    OUT out;
+
+    PARTS:
+    Mux(a=dffOut, b= in, sel=load, out=muxOut);
+    DFF(in=muxOut,out=dffOut, out=out);
+}