diff --git a/NES Emulator/bus.c b/NES Emulator/bus.c
index afe7fe3..ccc4784 100644
--- a/NES Emulator/bus.c	
+++ b/NES Emulator/bus.c	
@@ -34,7 +34,7 @@ struct Bus* createBus(SDL_Renderer* renderer)
 	memset(bus->ram, 0x00, 0x18);
 
 	// Create and insert cartridge
-	bus->cartridge = createCartridge(bus, "roms/nestest.nes");
+	bus->cartridge = createCartridge(bus, "roms/donkeykong.nes");
 
 	// Create CPU and attach it
 	bus->cpu = createCPU(bus);
diff --git a/NES Emulator/mappers/mapper000.c b/NES Emulator/mappers/mapper000.c
index 6cbc909..f7012e7 100644
--- a/NES Emulator/mappers/mapper000.c	
+++ b/NES Emulator/mappers/mapper000.c	
@@ -104,6 +104,6 @@ void Mapper000_GetPatternTableTexture(void* mapper, SDL_Texture* texture, int in
 	int pitch;
 	void* pixels;
 	SDL_LockTexture(texture, NULL, &pixels, &pitch);
-	SDL_memcpy(pixels, sMapper->chr_rom + 0x1000 * index, 0x1000);
+	SDL_memcpy(pixels, sMapper->chr_rom + (size_t)0x1000 * index, 0x1000);
 	SDL_UnlockTexture(texture);
 }
diff --git a/NES Emulator/ppu.c b/NES Emulator/ppu.c
index 4e20927..2756e34 100644
--- a/NES Emulator/ppu.c	
+++ b/NES Emulator/ppu.c	
@@ -357,12 +357,12 @@ SDL_Texture* getRenderedNameTableTexture(struct PPU* ppu, int index)
 	struct Pixel* pixels;
 	SDL_LockTexture(target, NULL, (void**)&pixels, &pitch);
 
-	Byte patternTable = 0x1000 * ppu->ppuCtrl.bgTile;
+	Word patternTable = 0x1000 * ppu->ppuCtrl.bgTile;
 	for (int y = 0; y < 30; y++)
 	{
 		for (int x = 0; x < 32; x++)
 		{
-			Byte offset = ppu->nameTables[index][y * 32 + x];
+			Byte offset = ppu->nameTables[index][(size_t)y * 32 + x];
 
 			for (int row = 0; row < 8; row++)
 			{