CabinetTileEntity

    @Override
    public void setInventorySlotContents(int slot, ItemStack itemStack)
    {
        if (slot == 0)
        {
            displayStack = itemStack;
        }
        else
        {
            contents[slot - 1] = itemStack;
        }
        if (itemStack != null && itemStack.stackSize > this.getInventoryStackLimit())
        {
            itemStack.stackSize = this.getInventoryStackLimit();
        }

        markDirty();
    }

    @Override
    public void markDirty()
    {
        super.markDirty();
        worldObj.markBlockForUpdate(pos);
    }