ref: f57846ada199f72501711b6e0c478828428d65dd
dir: /extras/extract_maps.py/
#!/usr/bin/python
#author: Bryan Bishop <kanzure@gmail.com>
#date: 2012-01-02
#purpose: compute full map pointers
import json
#parse hex values as base 16 (see calculate_pointer)
base = 16
#where to load the rom from
rom_filename = "../baserom.gbc"
rom = None #load the rom later
#map header pointers start at 0x1AE
start_map_header_pointers = 0x1AE
#bank bytes for each map header start at 0xC23D
start_map_header_pointer_banks = 0xC23D
#number of maps in this list
map_count = 0xF8 #including the 0th the total is is 248 or 0xF8
maps = {
0x00: "Pallet Town",
0x01: "Viridian City",
0x02: "Pewter City",
0x03: "Cerulean City",
0x04: "Lavendar Town", #??
0x05: "Vermilion City", #correct
0x06: "Celadon City",
0x07: "Fuchsia City",
0x08: "Cinnabar Island",
0x09: "Indigo Plateau",
0x0A: "Saffron City",
0x0B: "FREEZE",
0x0C: "Route 1",
0x0D: "Route 2",
0x0E: "Route 3",
0x0F: "Route 4",
0x10: "Route 5",
0x11: "Route 6",
0x12: "Route 7",
0x13: "Route 8",
0x14: "Route 9",
0x15: "Route 10",
0x16: "Route 11",
0x17: "Route 12",
0x18: "Route 13",
0x19: "Route 14",
0x1A: "Route 15",
0x1B: "Route 16",
0x1C: "Route 17",
0x1D: "Route 18",
0x1E: "Route 19",
0x1F: "Route 20",
0x20: "Route 21",
0x21: "Route 22",
0x22: "Route 23",
0x23: "Route 24",
0x24: "Route 25",
0x25: "Ash's House F1",
0x26: "Ash's House F2",
0x27: "Gary's House",
0x28: "Oak's Lab",
0x29: "Viridian Poke Center",
0x2A: "Viridian Mart",
0x2B: "School",
0x2C: "Viridian House",
0x2D: "Viridian Gym",
0x2E: "Digletts Cave (Route 2)",
0x2F: "Viridian Forest (exit)",
0x30: "Route 2 House",
0x31: "Route 2 Gate",
0x32: "Viridian Forest (Entrance)",
0x33: "Viridian Forest",
0x34: "Museum F1",
0x35: "Museum F2",
0x36: "Pewter Gym",
0x37: "Pewter House (1)",
0x38: "Pewter Mart",
0x39: "Pewter House (2)",
0x3A: "Pewter PokeCenter",
0x3B: "Mt. Moon (1)",
0x3C: "Mt. Moon (2)",
0x3D: "Mt. Moon (3)",
0x3E: "Cerulean House (Trashed)",
0x3F: "Cerulean House (2)",
0x40: "Cerulean Pokecenter",
0x41: "Cerulean Gym",
0x42: "Bike Shop",
0x43: "Cerulean Mart",
0x44: "Mt. Moon Pokecenter",
0x45: "COPY OF: Trashed House",
0x46: "Route 5 Gate",
0x47: "Underground Tunnel Entrance (Route 5)",
0x48: "Day Care M",
0x49: "Route 6 Gate",
0x4A: "Underground Tunnel Entrance (Route 6)",
0x4B: "COPY OF: Underground Tunnel Entrance (Route 6)",
0x4C: "Route 7 Gate",
0x4D: "Underground Path Entrance (Route 7)",
0x4E: "COPY OF: Underground Path Entrance (Route 7)",
0x4F: "Route 8 Gate",
0x50: "Underground Path Entrance (Route 8)",
0x51: "Rock Tunnel Pokecenter",
0x52: "Rock Tunnel (1)",
0x53: "Power Plant",
0x54: "Route 11 Gate",
0x55: "Digletts Cave Entrance (Route 11)",
0x56: "Route 11 Gate (Upstairs)",
0x57: "Route 12 Gate",
0x58: "Bill's House",
0x59: "Vermilion PokeCenter",
0x5A: "Fan Club",
0x5B: "Vermilion Mart",
0x5C: "Vermilion Gym",
0x5D: "Vermilion House (1)",
0x5E: "Vermilion Dock",
0x5F: "S.S. Anne (1)",
0x60: "S.S. Anne (2)",
0x61: "S.S. Anne (3)",
0x62: "S.S. Anne (4)",
0x63: "S.S. Anne (5)",
0x64: "S.S. Anne (6)",
0x65: "S.S. Anne (7)",
0x66: "S.S. Anne (8)",
0x67: "S.S. Anne (9)",
0x68: "S.S. Anne (10)",
0x69: "FREEZE",
0x6A: "FREEZE",
0x6B: "FREEZE",
0x6C: "Victory Road (1)",
0x6D: "FREEZE",
0x6E: "FREEZE",
0x6F: "FREEZE",
0x70: "FREEZE",
0x71: "Lance",
0x72: "FREEZE",
0x73: "FREEZE",
0x74: "FREEZE",
0x75: "FREEZE",
0x76: "Hall of Fame Room",
0x77: "Underground Path (N/S)",
0x78: "Gary",
0x79: "Underground Path (W/E)",
0x7A: "Celadon Mart (1)",
0x7B: "Celadon Mart (2)",
0x7C: "Celadon Mart (3)",
0x7D: "Celadon Mart (4)",
0x7E: "Celadon Mart (5)",
0x7F: "Celadon Mart (6)",
0x80: "Celadon Mansion (1)",
0x81: "Celadon Mansion (2)",
0x82: "Celadon Mansion (3)",
0x83: "Celadon Mansion (4)",
0x84: "Celadon Mansion (5)",
0x85: "Celadon Pokecenter",
0x86: "Celadon GYM",
0x87: "Celadon Game Corner",
0x88: "Celadon House",
0x89: "Celadon Prize Room",
0x8A: "Celadon Diner",
0x8B: "Celadon House (2)",
0x8C: "Celadon Hotel",
0x8D: "Lavender Pokecenter",
0x8E: "Pokemon Tower (1)",
0x8F: "Pokemon Tower (2)",
0x90: "Pokemon Tower (3)",
0x91: "Pokemon Tower (4)",
0x92: "Pokemon Tower (5)",
0x93: "Pokemon Tower (6) ",
0x94: "Pokemon Tower (7)",
0x95: "Lavender House (1)",
0x96: "Lavender Mart",
0x97: "Lavender House (2)",
0x98: "Fuchsia Mart",
0x99: "Fuchsia House (1)",
0x9A: "Fuchsia Pokecenter",
0x9B: "Fuchsia House (2)",
0x9C: "Safari Zone Entrance",
0x9D: "Fuchsia GYM",
0x9E: "Fuchsia Meeting Room",
0x9F: "Seafoam Islands (2)",
0xA0: "Seafoam Islands (3)",
0xA1: "Seafoam Islands (4)",
0xA2: "Seafoam Islands (5)",
0xA3: "Vermilion House (2)",
0xA4: "Fuchsia House (3)",
0xA5: "Mansion (1)",
0xA6: "Cinnibar Gym",
0xA7: "Lab (1)",
0xA8: "Lab (2)",
0xA9: "Lab (3)",
0xAA: "Lab (4)",
0xAB: "Cinnibar Pokecenter",
0xAC: "Cinnibar Mart",
0xAD: "COPY: Cinnibar Mart",
0xAE: "Indigo Plateau Lobby",
0xAF: "Copycat's House F1",
0xB0: "Copycat's House F2",
0xB1: "Fighting Dojo",
0xB2: "Saffron Gym",
0xB3: "Saffron House (1)",
0xB4: "Saffron Mart",
0xB5: "Silph Co (1)",
0xB6: "Saffron Pokecenter",
0xB7: "Saffron House (2)",
0xB8: "Route 15 Gate",
0xBA: "Route 16 Gate Map",
0xBB: "Route 16 Gate Upstairs",
0xBC: "Route 16 House",
0xBD: "Route 12 House",
0xBE: "Route 18 Gate",
0xBF: "Route 18 Gate Header",
0xC0: "Seafoam Islands (1)",
0xC1: "Route 22 Gate",
0xC2: "Victory Road (2)",
0xC3: "Route 12 Gate Upstairs",
0xC4: "Vermilion House (3)",
0xC5: "Diglett's Cave",
0xC6: "Victory Road (3)",
0xC7: "Rocket Hideout (1)",
0xC8: "Rocket Hideout (2)",
0xC9: "Rocket Hideout (3)",
0xCA: "Rocket Hideout (4) ",
0xCB: "Rocket Hideout (Elevator)",
0xCC: "FREEZE",
0xCD: "FREEZE",
0xCE: "FREEZE",
0xCF: "Silph Co (2)",
0xD0: "Silph Co (3)",
0xD1: "Silph Co (4)",
0xD2: "Silph Co (5)",
0xD3: "Silph Co (6)",
0xD4: "Silph Co (7)",
0xD5: "Silph Co (8)",
0xD6: "Mansion (2)",
0xD7: "Mansion (3)",
0xD8: "Mansion (4)",
0xD9: "Safari Zone East",
0xDA: "Safari Zone North",
0xDB: "Safari Zone West",
0xDC: "Safari Zone Center",
0xDD: "Safari Zone Rest House (1)",
0xDE: "Safari Zone Secret House",
0xDF: "Safari Zone Rest House (2)",
0xE0: "Safari Zone Rest House (3)",
0xE1: "Safari Zone Rest House (4)",
0xE2: "Unknown Dungeon (2)",
0xE3: "Unknown Dungeon (3)",
0xE4: "Unknown Dungeon (1)",
0xE5: "Name Rater",
0xE6: "Cerulean House (3)",
0xE7: "FREEZE",
0xE8: "Rock Tunnel (2)",
0xE9: "Silph Co (9)",
0xEA: "Silph Co (10)",
0xEB: "Silph Co (11)",
0xEC: "Silph Co (Elevator)",
0xED: "FREEZE",
0xEE: "FREEZE",
0xEF: "Battle Center M",
0xF0: "Trade Center M",
0xF1: "FREEZE",
0xF2: "FREEZE",
0xF3: "FREEZE",
0xF4: "FREEZE",
0xF5: "Loreli",
0xF6: "Bruno",
0xF7: "Agatha"
}
map_pointers = {
#0x00: {
# "name": "Pallet Town",
# "address": 0x182a1
# },
}
map_headers = {
#0x00: {
# "name": "Pallet Town",
# "address": 0x182a1,
# "tileset"
# "y"
# "x"
# "map_pointer"
# "texts_pointer"
# "script_pointer"
# "connection_byte"
# "num_connections"
# "connections":
# { "0":
# { map_id, connected_map_tile_pointer, current_map_tile_pointer, bigness, width, y, x, window_pointer }
# },
# "object_data_pointer"
# },
}
#haters gonna hate
def load_rom(filename=None):
"load the rom into a global (returns True/False)"
global rom
if not filename:
filename = rom_filename
try:
rom = open(filename, "rb").read()
return True
except Exception, exception:
print "error loading rom"
return False
def assert_rom():
global rom
assert rom, "rom must be loaded, see load_rom()"
def calculate_pointer(short_pointer, bank):
short_pointer = int(short_pointer)
bank = int(bank)
pointer = short_pointer - 0x4000 + (bank * 0x4000)
#result will be an integer
return pointer
def get_nth_map_header_pointer_bank_byte_address(map_id):
"returns the address to the bank byte associated with this map pointer"
address = start_map_header_pointer_banks + map_id
return address
def get_nth_map_header_pointer_bank_byte(map_id):
"returns the bank number for this map header"
assert_rom()
address = get_nth_map_header_pointer_bank_byte_address(map_id)
bank_byte = ord(rom[address])
return bank_byte
def get_nth_map_header_pointer(map_id):
"returns the full pointer to the map header struct for this map"
assert_rom()
#figure out where the bytes for this pointer are located
byte1_address = start_map_header_pointers + (map_id * 2)
byte2_address = start_map_header_pointers + (map_id * 2) + 1
#grab the two bytes making up the partial pointer
byte1 = ord(rom[byte1_address])
byte2 = ord(rom[byte2_address])
#swap the bytes (16-bit pointers for z80 are little endian)
temp = byte1
byte1 = byte2
byte2 = temp
del temp
#combine these into a single pointer (0x byte1 byte2)
partial_pointer = (byte2 + (byte1 << 8))
#print hex(partial_pointer)
#get the bank id
bank = get_nth_map_header_pointer_bank_byte(map_id)
#calculate the full pointer
pointer = calculate_pointer(partial_pointer, bank)
#return it as an integer
return pointer
def load_map_pointers():
global maps
global map_pointers
for map in maps.keys():
pointer = get_nth_map_header_pointer(map)
#print maps[map] + "\t\t\t" + hex(pointer)
entry = {
"name": maps[map],
"address": hex(pointer),
"bank": hex(get_nth_map_header_pointer_bank_byte(map))
}
map_pointers[map] = entry
#print json.dumps(map_pointers)
def read_connection_bytes(connection_bytes, bank):
map_id = ord(connection_bytes[0])
#connection strip
connected_map_tile_pointer_byte1 = ord(connection_bytes[1])
connected_map_tile_pointer_byte2 = ord(connection_bytes[2])
connected_map_tile_pointer = (connected_map_tile_pointer_byte1 + (connected_map_tile_pointer_byte2 << 8))
#connection strip
current_map_tile_pointer_byte1 = ord(connection_bytes[3])
current_map_tile_pointer_byte2 = ord(connection_bytes[4])
current_map_tile_pointer = (current_map_tile_pointer_byte1 + (current_map_tile_pointer_byte2 << 8))
bigness_byte = ord(connection_bytes[5])
width_byte = ord(connection_bytes[6])
y = ord(connection_bytes[7])
x = ord(connection_bytes[8])
#window
window_pointer_byte1 = ord(connection_bytes[9])
window_pointer_byte2 = ord(connection_bytes[10])
window_pointer = (window_pointer_byte1 + (window_pointer_byte2 << 8))
connection_data = {
"map_id": map_id,
"connected_map_tile_pointer": hex(connected_map_tile_pointer),
"current_map_tile_pointer": hex(current_map_tile_pointer),
"bigness": hex(bigness_byte),
"width": hex(width_byte),
"y": y,
"x": x,
"window_pointer": hex(window_pointer),
}
return connection_data
def read_map_header(address, bank): #bank because i'm lazy
address = int(address, base)
bank = int(bank, base)
tileset = ord(rom[address])
y = ord(rom[address+1])
x = ord(rom[address+2])
map_pointer_byte1 = ord(rom[address+3])
map_pointer_byte2 = ord(rom[address+4])
partial_map_pointer = (map_pointer_byte1 + (map_pointer_byte2 << 8))
map_pointer = calculate_pointer(partial_map_pointer, bank)
texts_pointer_byte1 = ord(rom[address+5])
texts_pointer_byte2 = ord(rom[address+6])
partial_texts_pointer = (texts_pointer_byte1 + (texts_pointer_byte2 << 8))
texts_pointer = calculate_pointer(partial_texts_pointer, bank)
script_pointer_byte1 = ord(rom[address+7])
script_pointer_byte2 = ord(rom[address+8])
partial_script_pointer = (script_pointer_byte1 + ( script_pointer_byte2 << 8))
script_pointer = calculate_pointer(partial_script_pointer, bank)
connection_byte = ord(rom[address+9]) #0xc = NORTH | SOUTH
# <&IIMarckus> the connection byte is a bitmask allowing 0-4 connections
# <&IIMarckus> each connection is 11 bytes
# <&IIMarckus> or'd
# <&IIMarckus> east = 1, west = 2, south = 4, north = 8
# <&IIMarckus> so a connection byte of 0xc means north/south
# <&IIMarckus> which means there are 22 more bytes, 11 for each connection
# < kanzure> 4 | 8 = c?
# <&IIMarckus> yes
# <&IIMarckus> easier to see if you convert to binary
# <&IIMarckus> 0100 | 1000 = 1100
num_connections = 0
connection_value = bin(connection_byte)[2:]
if connection_value[0] == "1": #NORTH
num_connections += 1
if len(connection_value) > 1 and connection_value[1] == "1": #SOUTH
num_connections += 1
if len(connection_value) > 2 and connection_value[2] == "1": #WEST
num_connections += 1
if len(connection_value) > 3 and connection_value[3] == "1": #EAST
num_connections += 1
#quick test for connection data
#connection0_stuff = rom[(address + 10):(address + 10 + 11)]
#print "Route: " + hex(ord(connection0_stuff[0]))
#setup
connections = {}
#go straight to object data if there are no connections
if num_connections > 0:
for connection in range(0, num_connections):
base_connection_address = address + 10 + (11 * connection)
connection_bytes = rom[base_connection_address : base_connection_address + 11]
connection_data = read_connection_bytes(connection_bytes, bank)
connections[connection] = connection_data
#we might have to jump around a bit
offset = address + 10 + (11 * num_connections)
#object data
object_data_pointer_byte1 = ord(rom[offset])
object_data_pointer_byte2 = ord(rom[offset+1])
partial_object_data_pointer = (object_data_pointer_byte1 + (object_data_pointer_byte2 << 8))
object_data_pointer = calculate_pointer(partial_object_data_pointer, bank)
map_header = {
"tileset": hex(tileset),
"y": hex(y),
"x": hex(x),
"map_pointer": hex(map_pointer),
"texts_pointer": hex(texts_pointer),
"script_pointer": hex(script_pointer),
"connection_byte": hex(connection_byte),
"num_connections": str(num_connections),
"connections": connections, #NORTH, SOUTH, WEST, EAST order matters
"object_data_pointer": hex(object_data_pointer),
}
return map_header
def read_all_map_headers():
if rom == None: load_rom()
assert_rom()
if len(map_pointers) == 0: load_map_pointers()
for map_id in map_pointers.keys():
map = map_pointers[map_id]
map_header = read_map_header(map["address"], map["bank"])
map_header["id"] = map_id
map_header["name"] = map["name"]
map_header["address"] = map["address"]
map_header["bank"] = map["bank"]
map_headers[map_id] = map_header
return map_headers
if __name__ == "__main__":
#read binary data from file
load_rom()
#where are the map structs?
load_map_pointers()
#print json.dumps(map_pointers)
#experimental...
#print json.dumps(read_map_header(map_pointers[0]["address"], map_pointers[0]["bank"]))
read_all_map_headers()
print json.dumps(map_headers)