Problems with memory on the Gamebuino Meta

Hello everyone,

It seems there is a problem in the Gamebuino Meta, or at least in the Meta's Library.

I am currently developing a Rogue-like game. In order to save the terrain I need to create a big, matrix-like array, in which I put every tile's value. On simple tests (for example a map of 10 * 10 tiles), it works as excepted.

But when the map grows (for example with a map of 80 * 64 tiles, there is a very strange behavior.

Consider the following program:

#include <Gamebuino-Meta.h>

const int sizeX = 80;
const int sizeY = 64;

// nothing interesting in this part
void setup() {
  gb.begin();  
}

void loop()
{
  // we artificially create an array of a "big" size...
  int *terrain = new int [sizeX * sizeY];
  // ... and we put zeros inside it
  for (int i = 0; i < sizeX * sizeY; i ++)
  {
   terrain[i] = 0;
  }

  // now we create some colors
  Color white = gb.createColor(255, 255, 255);
  Color red = gb.createColor(255, 0, 0);


  while(!gb.update());
  gb.display.clear();
  // we draw the array on the screen
  for (int y = 0; y < sizeY; y ++)
  {
    for (int x = 0; x < sizeX; x ++)
    {
      // we plot a different color depending on the value of an element of the array
      switch (terrain[y * sizeX + x])
      {
        case 0:
          gb.display.drawPixel(x, y, white);
          break;
        default:
          gb.display.drawPixel(x, y, red);
          break;
      }
    }
  }
  delete [] terrain;
}

So what do you expect from this program ?

If you understand my code, you can expect to see white everywhere, since the array is (or should be) full of zeros.
But here is what I get with the META Emulator:

(I get the same thing with my real Gamebuino Meta

Am I the only one who does not understand ?

In my humble opinion I think it is a memory issue. But I have not enough skills in C++ to solve it. What have I done wrong ? Can someone help me ?

Please help me.

Best regards, 

JosephScade

PS : please forgive my poor English, do not hesitate to ask if you don't understand.