Links Awakening: Implement New Game (#1334)

Adds Link's Awakening: DX. Fully imports and forks LADXR, with permission - https://github.com/daid/LADXR

worlds/ladx/GpsTracker.py

@@ -0,0 +1,92 @@
+import json
+roomAddress = 0xFFF6
+mapIdAddress = 0xFFF7
+indoorFlagAddress = 0xDBA5
+entranceRoomOffset = 0xD800
+screenCoordAddress = 0xFFFA
+
+mapMap = {
+    0x00: 0x01,
+    0x01: 0x01,
+    0x02: 0x01,
+    0x03: 0x01,
+    0x04: 0x01,
+    0x05: 0x01,
+    0x06: 0x02,
+    0x07: 0x02,
+    0x08: 0x02,
+    0x09: 0x02,
+    0x0A: 0x02,
+    0x0B: 0x02,
+    0x0C: 0x02,
+    0x0D: 0x02,
+    0x0E: 0x02,
+    0x0F: 0x02,
+    0x10: 0x02,
+    0x11: 0x02,
+    0x12: 0x02,
+    0x13: 0x02,
+    0x14: 0x02,
+    0x15: 0x02,
+    0x16: 0x02,
+    0x17: 0x02,
+    0x18: 0x02,
+    0x19: 0x02,
+    0x1D: 0x01,
+    0x1E: 0x01,
+    0x1F: 0x01,
+    0xFF: 0x03,
+}
+
+class GpsTracker:
+    room = None
+    location_changed = False
+    screenX = 0
+    screenY = 0
+    indoors = None
+
+    def __init__(self, gameboy) -> None:
+        self.gameboy = gameboy
+
+    async def read_byte(self, b):
+        return (await self.gameboy.async_read_memory(b))[0]
+
+    async def read_location(self):
+        indoors = await self.read_byte(indoorFlagAddress)
+
+        if indoors != self.indoors and self.indoors != None:
+            self.indoorsChanged = True
+        
+        self.indoors = indoors
+
+        mapId = await self.read_byte(mapIdAddress)
+        if mapId not in mapMap:
+            print(f'Unknown map ID {hex(mapId)}')
+            return
+
+        mapDigit = mapMap[mapId] << 8 if indoors else 0
+        last_room = self.room
+        self.room = await self.read_byte(roomAddress) + mapDigit
+
+        coords = await self.read_byte(screenCoordAddress)
+        self.screenX = coords & 0x0F
+        self.screenY = (coords & 0xF0) >> 4
+
+        if (self.room != last_room):
+            self.location_changed = True
+    
+    last_message = {}
+    async def send_location(self, socket, diff=False):
+        if self.room is None: 
+            return
+        message = {
+            "type":"location",
+            "refresh": True,
+            "version":"1.0",
+            "room": f'0x{self.room:02X}',
+            "x": self.screenX,
+            "y": self.screenY,
+        }
+        if message != self.last_message:
+            self.last_message = message
+            await socket.send(json.dumps(message))