Majora's Mask: Deku Palace SRM Location

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