console.clear();

local location="(not set)";
local flag=false;
function check()
	local pot={
		bit.rshift(bit.band(memory.read_u16_be(0x410FA6),0x0F00),0x8),
		bit.rshift(bit.band(memory.read_u16_be(0x410FA6),0x00F0),0x4),
		bit.band(memory.read_u16_be(0x410FA6),0x000F),
	}
	-- Link not holding pot anymore.
	if(memory.read_u32_be(0x3FFDB0+0x124)==0x00000000)then
		-- 0xX2XX
		-- 0xX3XX
		-- 0xX6XX
		-- 0xX7XX
		if(pot[1]==0x2 or pot[1]==0x3 or pot[1]==0x6 or pot[1]==0x7)then
			-- 0xXX15
			-- 0xXX65
			-- 0xXX2D
			-- 0xXX4B
			-- 0xXX80
			if( ((pot[2]==0x1 or pot[2]==0x6) and pot[3]==0x5) or (pot[2]==0x2 and pot[3]==0xD) or (pot[2]==0x4 and pot[3]==0xB) or (pot[2]==0x8 and pot[3]==0x0))then
				location="Goht Trial";
				return true;
			-- 0xXX01
			elseif(pot[2]==0x0 and pot[3]==0x1)then
				location="Pirate's Fortress";
				return true;
			end
		end
	end
	return false;
end

-- Reset on loading savestate.
function reset()
	if(flag)then
		flag=false;
	end
end

while true do
	event.onloadstate(reset);
	if(check() and flag==false)then
		gui.addmessage(location);
		gui.addmessage("");
		flag=true;
	end
	emu.frameadvance();
end