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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/05/Computer.hdl
+
+/**
+ * The HACK computer, including CPU, ROM and RAM.
+ * When reset is 0, the program stored in the computer's ROM executes.
+ * When reset is 1, the execution of the program restarts. 
+ * Thus, to start a program's execution, reset must be pushed "up" (1)
+ * and "down" (0). From this point onward the user is at the mercy of 
+ * the software. In particular, depending on the program's code, the 
+ * screen may show some output and the user may be able to interact 
+ * with the computer via the keyboard.
+ */
+
+CHIP Computer {
+
+    IN reset;
+
+    PARTS:
+    ROM32K(address=pc, out=instruction);
+    CPU(inM=inM, instruction=instruction, reset=reset, writeM=writeM, outM=outM, addressM=addressM, pc=pc);
+    Memory(in=outM, address=addressM, load=writeM, out=inM);
+}