Anpassungen Path-Struktur

original/tools/builtInChips/PC.hdl

@@ -0,0 +1,23 @@
+// 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/builtInChips/PC.hdl
+
+/**
+ * A 16-bit counter with increment, load, and reset modes.
+ * if      (inc(t) == 1)   out(t+1) = out(t) + 1
+ * else if (load(t) == 1)  out(t+1) = in(t)
+ * else if (reset(t) == 1) out(t+1) = 0
+ * else                    out(t+1) = out(t).
+ *
+ * To select a mode, assert the relevant control bit,
+ * and de-assert the other two bits. 
+ */
+CHIP PC {
+
+    IN  in[16], load, inc, reset;
+    OUT out[16];
+
+    BUILTIN PC;
+    CLOCKED in, load, inc, reset;
+}