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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, err;
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 err = 0;
let b = Array.new(3);
let b[1] = a[2] - 100;
if (b = a) { // Fail compare if b = a
let err = 1; }
do Memory.poke(8003, b[1] + err); // RAM[8003] = 122
let err = 0;
let c = Array.new(500);
let c[499] = a[2] - b[1];
if (c = a) { // Fail compare if c = a
let err = 1; }
if (c = b) { // Fail compare if c = b
let err = err + 10; }
do Memory.poke(8004, c[499]+err); // RAM[8004] = 100
do a.dispose(); // uses Memory.deAlloc
do b.dispose();
let err = 0;
let b = Array.new(3);
let b[0] = c[499] - 90;
if (b = c) { // Fail compare if b = c
let err = 1; }
do Memory.poke(8005, b[0] + err); // RAM[8005] = 10
do c.dispose();
do b.dispose();
return;
}
}
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