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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/12/MemoryTest/Main.jack
+
+/** Test program for the OS Memory class. */
+class Main {
+
+ /** Performs various memory manipulations. */
+ function void main() {
+ var int temp;
+ var Array a, b, c;
+
+ do Memory.poke(8000, 333); // RAM[8000] = 333
+ let temp = Memory.peek(8000);
+ do Memory.poke(8001, temp + 1); // RAM[8001] = 334
+
+ let a = Array.new(3); // uses Memory.alloc
+ let a[2] = 222;
+ do Memory.poke(8002, a[2]); // RAM[8002] = 222
+
+ let b = Array.new(3);
+ let b[1] = a[2] - 100;
+ do Memory.poke(8003, b[1]); // RAM[8003] = 122
+
+ let c = Array.new(500);
+ let c[499] = a[2] - b[1];
+ do Memory.poke(8004, c[499]); // RAM[8004] = 100
+
+ do a.dispose(); // uses Memory.deAlloc
+ do b.dispose();
+
+ let b = Array.new(3);
+ let b[0] = c[499] - 90;
+ do Memory.poke(8005, b[0]); // RAM[8005] = 10
+
+ do c.dispose();
+ do b.dispose();
+
+ return;
+ }
+}