function getTile(dx, dy)
	if gameinfo.getromname() == "Super Mario World (USA)" then
		x = math.floor((marioX+dx+8)/16)
		y = math.floor((marioY+dy)/16)

		return memory.readbyte(0x1C800 + math.floor(x/0x10)*0x1B0 + y*0x10 + x%0x10)
	elseif gameinfo.getromname() == "Super Mario Bros." then
		local x = marioX + dx + 8
		local y = marioY + dy - 16
		local page = math.floor(x/256)%2

		local subx = math.floor((x%256)/16)
		local suby = math.floor((y - 32)/16)
		local addr = 0x500 + page*13*16+suby*16+subx

		if suby >= 13 or suby < 0 then
			return 0
		end

		if memory.readbyte(addr) ~= 0 then
			return 1
		else
			return 0
		end
	end
end