Archipelago/worlds/oot/Patches.py

import struct
import itertools
import re
import zlib
from collections import defaultdict
from functools import partial

from .Items import OOTItem
from .LocationList import business_scrubs
from .Hints import writeGossipStoneHints, buildAltarHints, \
        buildGanonText, getSimpleHintNoPrefix
from .Utils import data_path
from .Messages import read_messages, update_message_by_id, read_shop_items, update_warp_song_text, \
        write_shop_items, remove_unused_messages, make_player_message, \
        add_item_messages, repack_messages, shuffle_messages, \
        get_message_by_id
from .MQ import patch_files, File, update_dmadata, insert_space, add_relocations
from .SaveContext import SaveContext
from .TextBox import character_table, NORMAL_LINE_WIDTH


# "Spoiler" argument deleted; can probably be replaced with calls to world.world
def patch_rom(world, rom):
    with open(data_path('generated/rom_patch.txt'), 'r') as stream:
        for line in stream:
            address, value = [int(x, 16) for x in line.split(',')]
            rom.write_int32(address, value)
    rom.scan_dmadata_update()

    # Write Randomizer title screen logo
    with open(data_path('title.bin'), 'rb') as stream:
        writeAddress = 0x01795300
        titleBytesComp = stream.read()
        titleBytesDiff = zlib.decompress(titleBytesComp)

        originalBytes = rom.original.buffer[writeAddress: writeAddress+ len(titleBytesDiff)]
        titleBytes = bytearray([a ^ b for a, b in zip(titleBytesDiff, originalBytes)])
        rom.write_bytes(writeAddress, titleBytes)

    # Fixes the typo of keatan mask in the item select screen
    with open(data_path('keaton.bin'), 'rb') as stream:
        writeAddress = 0x8A7C00
        keatonBytesComp = stream.read()
        keatonBytesDiff = zlib.decompress(keatonBytesComp)

        originalBytes = rom.original.buffer[writeAddress: writeAddress+ len(keatonBytesDiff)]
        keatonBytes = bytearray([a ^ b for a, b in zip(keatonBytesDiff, originalBytes)])
        rom.write_bytes(writeAddress, keatonBytes)

    # Load Triforce model into a file
    triforce_obj_file = File({ 'Name': 'object_gi_triforce' })
    triforce_obj_file.copy(rom)
    with open(data_path('triforce.bin'), 'rb') as stream:
        obj_data = stream.read()
        rom.write_bytes(triforce_obj_file.start, obj_data)
        triforce_obj_file.end = triforce_obj_file.start + len(obj_data)
    update_dmadata(rom, triforce_obj_file)
    # Add it to the extended object table
    add_to_extended_object_table(rom, 0x193, triforce_obj_file)

    # Build a Double Defense model from the Heart Container model
    dd_obj_file = File({
        'Name': 'object_gi_hearts',
        'Start': '014D9000',
        'End': '014DA590',
    })
    dd_obj_file.copy(rom)
    # Update colors for the Double Defense variant
    rom.write_bytes(dd_obj_file.start + 0x1294, [0xFF, 0xCF, 0x0F]) # Exterior Primary Color
    rom.write_bytes(dd_obj_file.start + 0x12B4, [0xFF, 0x46, 0x32]) # Exterior Env Color
    rom.write_int32s(dd_obj_file.start + 0x12A8, [0xFC173C60, 0x150C937F]) # Exterior Combine Mode
    rom.write_bytes(dd_obj_file.start + 0x1474, [0xFF, 0xFF, 0xFF]) # Interior Primary Color
    rom.write_bytes(dd_obj_file.start + 0x1494, [0xFF, 0xFF, 0xFF]) # Interior Env Color
    update_dmadata(rom, dd_obj_file)
    # Add it to the extended object table
    add_to_extended_object_table(rom, 0x194, dd_obj_file)

    # Set default targeting option to Hold. I got fed up enough with this that I made it a main option
    if world.default_targeting == 'hold':
        rom.write_byte(0xB71E6D, 0x01)
    else:
        rom.write_byte(0xB71E6D, 0x00)

    # Create an option so that recovery hearts no longer drop by changing the code which checks Link's health when an item is spawned.
    if world.no_collectible_hearts:
        rom.write_byte(0xA895B7, 0x2E)

    # Force language to be English in the event a Japanese rom was submitted
    rom.write_byte(0x3E, 0x45)
    rom.force_patch.append(0x3E)

    # Increase the instance size of Bombchus prevent the heap from becoming corrupt when
    # a Dodongo eats a Bombchu. Does not fix stale pointer issues with the animation
    rom.write_int32(0xD6002C, 0x1F0)

    # Can always return to youth
    rom.write_byte(0xCB6844, 0x35)
    rom.write_byte(0x253C0E2, 0x03) # Moves sheik from pedestal

    # Fix Ice Cavern Alcove Camera
    if not world.dungeon_mq['Ice Cavern']:
        rom.write_byte(0x2BECA25,0x01);
        rom.write_byte(0x2BECA2D,0x01);

    # Fix GS rewards to be static
    rom.write_int32(0xEA3934, 0)
    rom.write_bytes(0xEA3940, [0x10, 0x00])

    # Fix horseback archery rewards to be static
    rom.write_byte(0xE12BA5, 0x00)
    rom.write_byte(0xE12ADD, 0x00)

    # Fix deku theater rewards to be static
    rom.write_bytes(0xEC9A7C, [0x00, 0x00, 0x00, 0x00]) #Sticks
    rom.write_byte(0xEC9CD5, 0x00) #Nuts

    # Fix deku scrub who sells stick upgrade
    rom.write_bytes(0xDF8060, [0x00, 0x00, 0x00, 0x00])

    # Fix deku scrub who sells nut upgrade
    rom.write_bytes(0xDF80D4, [0x00, 0x00, 0x00, 0x00])

    # Fix rolling goron as child reward to be static
    rom.write_bytes(0xED2960, [0x00, 0x00, 0x00, 0x00])

    # Fix proximity text boxes (Navi) (Part 1)
    rom.write_bytes(0xDF8B84, [0x00, 0x00, 0x00, 0x00])

    # Fix final magic bean to cost 99
    rom.write_byte(0xE20A0F, 0x63)
    rom.write_bytes(0x94FCDD, [0x08, 0x39, 0x39])

    # Remove locked door to Boss Key Chest in Fire Temple
    if not world.keysanity and not world.dungeon_mq['Fire Temple']:
        rom.write_byte(0x22D82B7, 0x3F)
    # Remove the unused locked door in water temple
    if not world.dungeon_mq['Water Temple']:
        rom.write_byte(0x25B8197, 0x3F)

    if world.bombchus_in_logic:
        rom.write_int32(rom.sym('BOMBCHUS_IN_LOGIC'), 1)

    # Change graveyard graves to not allow grabbing on to the ledge
    rom.write_byte(0x0202039D, 0x20)
    rom.write_byte(0x0202043C, 0x24)


    # Fix Castle Courtyard to check for meeting Zelda, not Zelda fleeing, to block you
    rom.write_bytes(0xCD5E76, [0x0E, 0xDC])
    rom.write_bytes(0xCD5E12, [0x0E, 0xDC])

    # Cutscene for all medallions never triggers when leaving shadow or spirit temples(hopefully stops warp to colossus on shadow completion with boss reward shuffle)
    rom.write_byte(0xACA409, 0xAD)
    rom.write_byte(0xACA49D, 0xCE)

    # Speed Zelda's Letter scene
    rom.write_bytes(0x290E08E, [0x05, 0xF0])
    rom.write_byte(0xEFCBA7, 0x08)
    rom.write_byte(0xEFE7C7, 0x05)
    #rom.write_byte(0xEFEAF7, 0x08)
    #rom.write_byte(0xEFE7C7, 0x05)
    rom.write_bytes(0xEFE938, [0x00, 0x00, 0x00, 0x00])
    rom.write_bytes(0xEFE948, [0x00, 0x00, 0x00, 0x00])
    rom.write_bytes(0xEFE950, [0x00, 0x00, 0x00, 0x00])

    # Speed Zelda escaping from Hyrule Castle
    Block_code = [0x00, 0x00, 0x00, 0x01, 0x00, 0x21, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02]
    rom.write_bytes(0x1FC0CF8, Block_code)

    # songs as items flag
    songs_as_items = (world.shuffle_song_items != 'song') or world.starting_songs

    if songs_as_items:
        rom.write_byte(rom.sym('SONGS_AS_ITEMS'), 1)

    # Speed learning Zelda's Lullaby
    rom.write_int32s(0x02E8E90C, [0x000003E8, 0x00000001]) # Terminator Execution
    if songs_as_items:
        rom.write_int16s(None, [0x0073, 0x001, 0x0002, 0x0002]) # ID, start, end, end
    else:
        rom.write_int16s(None, [0x0073, 0x003B, 0x003C, 0x003C]) # ID, start, end, end


    rom.write_int32s(0x02E8E91C, [0x00000013, 0x0000000C]) # Textbox, Count
    if songs_as_items:
        rom.write_int16s(None, [0xFFFF, 0x0000, 0x0010, 0xFFFF, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2
    else:
        rom.write_int16s(None, [0x0017, 0x0000, 0x0010, 0x0002, 0x088B, 0xFFFF]) # ID, start, end, type, alt1, alt2
    rom.write_int16s(None, [0x00D4, 0x0011, 0x0020, 0x0000, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2

    # Speed learning Sun's Song
    if songs_as_items:
        rom.write_int32(0x0332A4A4, 0xFFFFFFFF) # Header: frame_count
    else:
        rom.write_int32(0x0332A4A4, 0x0000003C) # Header: frame_count

    rom.write_int32s(0x0332A868, [0x00000013, 0x00000008]) # Textbox, Count
    rom.write_int16s(None, [0x0018, 0x0000, 0x0010, 0x0002, 0x088B, 0xFFFF]) # ID, start, end, type, alt1, alt2
    rom.write_int16s(None, [0x00D3, 0x0011, 0x0020, 0x0000, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2

    # Speed learning Saria's Song
    if songs_as_items:
        rom.write_int32(0x020B1734, 0xFFFFFFFF) # Header: frame_count
    else:
        rom.write_int32(0x020B1734, 0x0000003C) # Header: frame_count

    rom.write_int32s(0x20B1DA8, [0x00000013, 0x0000000C]) # Textbox, Count
    rom.write_int16s(None, [0x0015, 0x0000, 0x0010, 0x0002, 0x088B, 0xFFFF]) # ID, start, end, type, alt1, alt2
    rom.write_int16s(None, [0x00D1, 0x0011, 0x0020, 0x0000, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2

    rom.write_int32s(0x020B19C0, [0x0000000A, 0x00000006]) # Link, Count
    rom.write_int16s(0x020B19C8, [0x0011, 0x0000, 0x0010, 0x0000]) #action, start, end, ????
    rom.write_int16s(0x020B19F8, [0x003E, 0x0011, 0x0020, 0x0000]) #action, start, end, ????
    rom.write_int32s(None,         [0x80000000,                          # ???
                                     0x00000000, 0x000001D4, 0xFFFFF731,  # start_XYZ
                                     0x00000000, 0x000001D4, 0xFFFFF712]) # end_XYZ

    # Speed learning Epona's Song
    rom.write_int32s(0x029BEF60, [0x000003E8, 0x00000001]) # Terminator Execution
    if songs_as_items:
        rom.write_int16s(None, [0x005E, 0x0001, 0x0002, 0x0002]) # ID, start, end, end
    else:
        rom.write_int16s(None, [0x005E, 0x000A, 0x000B, 0x000B]) # ID, start, end, end

    rom.write_int32s(0x029BECB0, [0x00000013, 0x00000002]) # Textbox, Count
    if songs_as_items:
        rom.write_int16s(None, [0xFFFF, 0x0000, 0x0009, 0xFFFF, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2
    else:
        rom.write_int16s(None, [0x00D2, 0x0000, 0x0009, 0x0000, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2
    rom.write_int16s(None, [0xFFFF, 0x000A, 0x003C, 0xFFFF, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2

    # Speed learning Song of Time
    rom.write_int32s(0x0252FB98, [0x000003E8, 0x00000001]) # Terminator Execution
    if songs_as_items:
        rom.write_int16s(None, [0x0035, 0x0001, 0x0002, 0x0002]) # ID, start, end, end
    else:
        rom.write_int16s(None, [0x0035, 0x003B, 0x003C, 0x003C]) # ID, start, end, end

    rom.write_int32s(0x0252FC80, [0x00000013, 0x0000000C]) # Textbox, Count
    if songs_as_items:
        rom.write_int16s(None, [0xFFFF, 0x0000, 0x0010, 0xFFFF, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2
    else:
        rom.write_int16s(None, [0x0019, 0x0000, 0x0010, 0x0002, 0x088B, 0xFFFF]) # ID, start, end, type, alt1, alt2
    rom.write_int16s(None, [0x00D5, 0x0011, 0x0020, 0x0000, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2

    rom.write_int32(0x01FC3B84, 0xFFFFFFFF) # Other Header?: frame_count

    # Speed learning Song of Storms
    if songs_as_items:
        rom.write_int32(0x03041084, 0xFFFFFFFF) # Header: frame_count
    else:
        rom.write_int32(0x03041084, 0x0000000A) # Header: frame_count

    rom.write_int32s(0x03041088, [0x00000013, 0x00000002]) # Textbox, Count
    rom.write_int16s(None, [0x00D6, 0x0000, 0x0009, 0x0000, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2
    rom.write_int16s(None, [0xFFFF, 0x00BE, 0x00C8, 0xFFFF, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2

    # Speed learning Minuet of Forest
    if songs_as_items:
        rom.write_int32(0x020AFF84, 0xFFFFFFFF) # Header: frame_count
    else:
        rom.write_int32(0x020AFF84, 0x0000003C) # Header: frame_count

    rom.write_int32s(0x020B0800, [0x00000013, 0x0000000A]) # Textbox, Count
    rom.write_int16s(None, [0x000F, 0x0000, 0x0010, 0x0002, 0x088B, 0xFFFF]) # ID, start, end, type, alt1, alt2
    rom.write_int16s(None, [0x0073, 0x0011, 0x0020, 0x0000, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2

    rom.write_int32s(0x020AFF88, [0x0000000A, 0x00000005]) # Link, Count
    rom.write_int16s(0x020AFF90, [0x0011, 0x0000, 0x0010, 0x0000]) #action, start, end, ????
    rom.write_int16s(0x020AFFC1, [0x003E, 0x0011, 0x0020, 0x0000]) #action, start, end, ????

    rom.write_int32s(0x020B0488, [0x00000056, 0x00000001]) # Music Change, Count
    rom.write_int16s(None, [0x003F, 0x0021, 0x0022, 0x0000]) #action, start, end, ????

    rom.write_int32s(0x020B04C0, [0x0000007C, 0x00000001]) # Music Fade Out, Count
    rom.write_int16s(None, [0x0004, 0x0000, 0x0000, 0x0000]) #action, start, end, ????

    # Speed learning Bolero of Fire
    if songs_as_items:
        rom.write_int32(0x0224B5D4, 0xFFFFFFFF) # Header: frame_count
    else:
        rom.write_int32(0x0224B5D4, 0x0000003C) # Header: frame_count

    rom.write_int32s(0x0224D7E8, [0x00000013, 0x0000000A]) # Textbox, Count
    rom.write_int16s(None, [0x0010, 0x0000, 0x0010, 0x0002, 0x088B, 0xFFFF]) # ID, start, end, type, alt1, alt2
    rom.write_int16s(None, [0x0074, 0x0011, 0x0020, 0x0000, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2

    rom.write_int32s(0x0224B5D8, [0x0000000A, 0x0000000B]) # Link, Count
    rom.write_int16s(0x0224B5E0, [0x0011, 0x0000, 0x0010, 0x0000]) #action, start, end, ????
    rom.write_int16s(0x0224B610, [0x003E, 0x0011, 0x0020, 0x0000]) #action, start, end, ????

    rom.write_int32s(0x0224B7F0, [0x0000002F, 0x0000000E]) # Sheik, Count
    rom.write_int16s(0x0224B7F8, [0x0000]) #action
    rom.write_int16s(0x0224B828, [0x0000]) #action
    rom.write_int16s(0x0224B858, [0x0000]) #action
    rom.write_int16s(0x0224B888, [0x0000]) #action

    # Speed learning Serenade of Water
    if songs_as_items:
        rom.write_int32(0x02BEB254, 0xFFFFFFFF) # Header: frame_count
    else:
        rom.write_int32(0x02BEB254, 0x0000003C) # Header: frame_count

    rom.write_int32s(0x02BEC880, [0x00000013, 0x00000010]) # Textbox, Count
    rom.write_int16s(None, [0x0011, 0x0000, 0x0010, 0x0002, 0x088B, 0xFFFF]) # ID, start, end, type, alt1, alt2
    rom.write_int16s(None, [0x0075, 0x0011, 0x0020, 0x0000, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2

    rom.write_int32s(0x02BEB258, [0x0000000A, 0x0000000F]) # Link, Count
    rom.write_int16s(0x02BEB260, [0x0011, 0x0000, 0x0010, 0x0000]) #action, start, end, ????
    rom.write_int16s(0x02BEB290, [0x003E, 0x0011, 0x0020, 0x0000]) #action, start, end, ????

    rom.write_int32s(0x02BEB530, [0x0000002F, 0x00000006]) # Sheik, Count
    rom.write_int16s(0x02BEB538, [0x0000, 0x0000, 0x018A, 0x0000]) #action, start, end, ????
    rom.write_int32s(None,         [0x1BBB0000,                          # ???
                                     0xFFFFFB10, 0x8000011A, 0x00000330,  # start_XYZ
                                     0xFFFFFB10, 0x8000011A, 0x00000330]) # end_XYZ

    rom.write_int32s(0x02BEC848, [0x00000056, 0x00000001]) # Music Change, Count
    rom.write_int16s(None, [0x0059, 0x0021, 0x0022, 0x0000]) #action, start, end, ????

    # Speed learning Nocturne of Shadow
    rom.write_int32s(0x01FFE458, [0x000003E8, 0x00000001]) # Other Scene? Terminator Execution
    rom.write_int16s(None, [0x002F, 0x0001, 0x0002, 0x0002]) # ID, start, end, end

    rom.write_int32(0x01FFFDF4, 0x0000003C) # Header: frame_count

    rom.write_int32s(0x02000FD8, [0x00000013, 0x0000000E]) # Textbox, Count
    if songs_as_items:
        rom.write_int16s(None, [0xFFFF, 0x0000, 0x0010, 0xFFFF, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2
    else:
        rom.write_int16s(None, [0x0013, 0x0000, 0x0010, 0x0002, 0x088B, 0xFFFF]) # ID, start, end, type, alt1, alt2
    rom.write_int16s(None, [0x0077, 0x0011, 0x0020, 0x0000, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2

    rom.write_int32s(0x02000128, [0x000003E8, 0x00000001]) # Terminator Execution
    if songs_as_items:
        rom.write_int16s(None, [0x0032, 0x0001, 0x0002, 0x0002]) # ID, start, end, end
    else:
        rom.write_int16s(None, [0x0032, 0x003A, 0x003B, 0x003B]) # ID, start, end, end

    # Speed learning Requiem of Spirit
    rom.write_int32(0x0218AF14, 0x0000003C) # Header: frame_count

    rom.write_int32s(0x0218C574, [0x00000013, 0x00000008]) # Textbox, Count
    if songs_as_items:
        rom.write_int16s(None, [0xFFFF, 0x0000, 0x0010, 0xFFFF, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2
    else:
        rom.write_int16s(None, [0x0012, 0x0000, 0x0010, 0x0002, 0x088B, 0xFFFF]) # ID, start, end, type, alt1, alt2
    rom.write_int16s(None, [0x0076, 0x0011, 0x0020, 0x0000, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2

    rom.write_int32s(0x0218B478, [0x000003E8, 0x00000001]) # Terminator Execution
    if songs_as_items:
        rom.write_int16s(None, [0x0030, 0x0001, 0x0002, 0x0002]) # ID, start, end, end
    else:
        rom.write_int16s(None, [0x0030, 0x003A, 0x003B, 0x003B]) # ID, start, end, end

    rom.write_int32s(0x0218AF18, [0x0000000A, 0x0000000B]) # Link, Count
    rom.write_int16s(0x0218AF20, [0x0011, 0x0000, 0x0010, 0x0000]) #action, start, end, ????
    rom.write_int32s(None,         [0x40000000,                          # ???
                                     0xFFFFFAF9, 0x00000008, 0x00000001,  # start_XYZ
                                     0xFFFFFAF9, 0x00000008, 0x00000001,  # end_XYZ
                                     0x0F671408, 0x00000000, 0x00000001]) # normal_XYZ
    rom.write_int16s(0x0218AF50, [0x003E, 0x0011, 0x0020, 0x0000]) #action, start, end, ????

    # Speed learning Prelude of Light
    if songs_as_items:
        rom.write_int32(0x0252FD24, 0xFFFFFFFF) # Header: frame_count
    else:
        rom.write_int32(0x0252FD24, 0x0000004A) # Header: frame_count

    rom.write_int32s(0x02531320, [0x00000013, 0x0000000E]) # Textbox, Count
    rom.write_int16s(None, [0x0014, 0x0000, 0x0010, 0x0002, 0x088B, 0xFFFF]) # ID, start, end, type, alt1, alt2
    rom.write_int16s(None, [0x0078, 0x0011, 0x0020, 0x0000, 0xFFFF, 0xFFFF]) # ID, start, end, type, alt1, alt2

    rom.write_int32s(0x0252FF10, [0x0000002F, 0x00000009]) # Sheik, Count
    rom.write_int16s(0x0252FF18, [0x0006, 0x0000, 0x0000, 0x0000]) #action, start, end, ????

    rom.write_int32s(0x025313D0, [0x00000056, 0x00000001]) # Music Change, Count
    rom.write_int16s(None, [0x003B, 0x0021, 0x0022, 0x0000]) #action, start, end, ????

    # Speed scene after Deku Tree
    rom.write_bytes(0x2077E20, [0x00, 0x07, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02])
    rom.write_bytes(0x2078A10, [0x00, 0x0E, 0x00, 0x1F, 0x00, 0x20, 0x00, 0x20])
    Block_code = [0x00, 0x80, 0x00, 0x00, 0x00, 0x1E, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF,
                  0xFF, 0xFF, 0x00, 0x1E, 0x00, 0x28, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]
    rom.write_bytes(0x2079570, Block_code)

    # Speed scene after Dodongo's Cavern
    rom.write_bytes(0x2221E88, [0x00, 0x0C, 0x00, 0x3B, 0x00, 0x3C, 0x00, 0x3C])
    rom.write_bytes(0x2223308, [0x00, 0x81, 0x00, 0x00, 0x00, 0x3A, 0x00, 0x00])

    # Speed scene after Jabu Jabu's Belly
    rom.write_bytes(0xCA3530, [0x00, 0x00, 0x00, 0x00])
    rom.write_bytes(0x2113340, [0x00, 0x0D, 0x00, 0x3B, 0x00, 0x3C, 0x00, 0x3C])
    rom.write_bytes(0x2113C18, [0x00, 0x82, 0x00, 0x00, 0x00, 0x3A, 0x00, 0x00])
    rom.write_bytes(0x21131D0, [0x00, 0x01, 0x00, 0x00, 0x00, 0x3C, 0x00, 0x3C])

    # Speed scene after Forest Temple
    rom.write_bytes(0xD4ED68, [0x00, 0x45, 0x00, 0x3B, 0x00, 0x3C, 0x00, 0x3C])
    rom.write_bytes(0xD4ED78, [0x00, 0x3E, 0x00, 0x00, 0x00, 0x3A, 0x00, 0x00])
    rom.write_bytes(0x207B9D4, [0xFF, 0xFF, 0xFF, 0xFF])

    # Speed scene after Fire Temple
    rom.write_bytes(0x2001848, [0x00, 0x1E, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02])
    rom.write_bytes(0xD100B4, [0x00, 0x62, 0x00, 0x3B, 0x00, 0x3C, 0x00, 0x3C])
    rom.write_bytes(0xD10134, [0x00, 0x3C, 0x00, 0x00, 0x00, 0x3A, 0x00, 0x00])

    # Speed scene after Water Temple
    rom.write_bytes(0xD5A458, [0x00, 0x15, 0x00, 0x3B, 0x00, 0x3C, 0x00, 0x3C])
    rom.write_bytes(0xD5A3A8, [0x00, 0x3D, 0x00, 0x00, 0x00, 0x3A, 0x00, 0x00])
    rom.write_bytes(0x20D0D20, [0x00, 0x29, 0x00, 0xC7, 0x00, 0xC8, 0x00, 0xC8])

    # Speed scene after Shadow Temple
    rom.write_bytes(0xD13EC8, [0x00, 0x61, 0x00, 0x3B, 0x00, 0x3C, 0x00, 0x3C])
    rom.write_bytes(0xD13E18, [0x00, 0x41, 0x00, 0x00, 0x00, 0x3A, 0x00, 0x00])

    # Speed scene after Spirit Temple
    rom.write_bytes(0xD3A0A8, [0x00, 0x60, 0x00, 0x3B, 0x00, 0x3C, 0x00, 0x3C])
    rom.write_bytes(0xD39FF0, [0x00, 0x3F, 0x00, 0x00, 0x00, 0x3A, 0x00, 0x00])

    # Speed Nabooru defeat scene
    rom.write_bytes(0x2F5AF84, [0x00, 0x00, 0x00, 0x05])
    rom.write_bytes(0x2F5C7DA, [0x00, 0x01, 0x00, 0x02])
    rom.write_bytes(0x2F5C7A2, [0x00, 0x03, 0x00, 0x04])
    rom.write_byte(0x2F5B369, 0x09)
    rom.write_byte(0x2F5B491, 0x04)
    rom.write_byte(0x2F5B559, 0x04)
    rom.write_byte(0x2F5B621, 0x04)
    rom.write_byte(0x2F5B761, 0x07)
    rom.write_bytes(0x2F5B840, [0x00, 0x05, 0x00, 0x01, 0x00, 0x05, 0x00, 0x05]) #shorten white flash

    # Speed scene with all medallions
    rom.write_bytes(0x2512680, [0x00, 0x74, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02])

    # Speed collapse of Ganon's Tower
    rom.write_bytes(0x33FB328, [0x00, 0x76, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02])

    # Speed Phantom Ganon defeat scene
    rom.write_bytes(0xC944D8, [0x00, 0x00, 0x00, 0x00])
    rom.write_bytes(0xC94548, [0x00, 0x00, 0x00, 0x00])
    rom.write_bytes(0xC94730, [0x00, 0x00, 0x00, 0x00])
    rom.write_bytes(0xC945A8, [0x00, 0x00, 0x00, 0x00])
    rom.write_bytes(0xC94594, [0x00, 0x00, 0x00, 0x00])

    # Speed Twinrova defeat scene
    rom.write_bytes(0xD678CC, [0x24, 0x01, 0x03, 0xA2, 0xA6, 0x01, 0x01, 0x42])
    rom.write_bytes(0xD67BA4, [0x10, 0x00])

    # Speed scenes during final battle
    # Ganondorf battle end
    rom.write_byte(0xD82047, 0x09)
    # Zelda descends
    rom.write_byte(0xD82AB3, 0x66)
    rom.write_byte(0xD82FAF, 0x65)
    rom.write_int16s(0xD82D2E, [0x041F])
    rom.write_int16s(0xD83142, [0x006B])
    rom.write_bytes(0xD82DD8, [0x00, 0x00, 0x00, 0x00])
    rom.write_bytes(0xD82ED4, [0x00, 0x00, 0x00, 0x00])
    rom.write_byte(0xD82FDF, 0x33)
    # After tower collapse
    rom.write_byte(0xE82E0F, 0x04)
    # Ganon intro
    rom.write_bytes(0xE83D28, [0x00, 0x00, 0x00, 0x00])
    rom.write_bytes(0xE83B5C, [0x00, 0x00, 0x00, 0x00])
    rom.write_bytes(0xE84C80, [0x10, 0x00])

    # Speed completion of the trials in Ganon's Castle
    rom.write_int16s(0x31A8090, [0x006B, 0x0001, 0x0002, 0x0002]) #Forest
    rom.write_int16s(0x31A9E00, [0x006E, 0x0001, 0x0002, 0x0002]) #Fire
    rom.write_int16s(0x31A8B18, [0x006C, 0x0001, 0x0002, 0x0002]) #Water
    rom.write_int16s(0x31A9430, [0x006D, 0x0001, 0x0002, 0x0002]) #Shadow
    rom.write_int16s(0x31AB200, [0x0070, 0x0001, 0x0002, 0x0002]) #Spirit
    rom.write_int16s(0x31AA830, [0x006F, 0x0001, 0x0002, 0x0002]) #Light

    # Speed obtaining Fairy Ocarina
    rom.write_bytes(0x2151230, [0x00, 0x72, 0x00, 0x3C, 0x00, 0x3D, 0x00, 0x3D])
    Block_code = [0x00, 0x4A, 0x00, 0x00, 0x00, 0x3A, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF,
                  0xFF, 0xFF, 0x00, 0x3C, 0x00, 0x81, 0xFF, 0xFF]
    rom.write_bytes(0x2151240, Block_code)
    rom.write_bytes(0x2150E20, [0xFF, 0xFF, 0xFA, 0x4C])

    if world.shuffle_ocarinas:
        symbol = rom.sym('OCARINAS_SHUFFLED')
        rom.write_byte(symbol,0x01)

    # Speed Zelda Light Arrow cutscene
    rom.write_bytes(0x2531B40, [0x00, 0x28, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02])
    rom.write_bytes(0x2532FBC, [0x00, 0x75])
    rom.write_bytes(0x2532FEA, [0x00, 0x75, 0x00, 0x80])
    rom.write_byte(0x2533115, 0x05)
    rom.write_bytes(0x2533141, [0x06, 0x00, 0x06, 0x00, 0x10])
    rom.write_bytes(0x2533171, [0x0F, 0x00, 0x11, 0x00, 0x40])
    rom.write_bytes(0x25331A1, [0x07, 0x00, 0x41, 0x00, 0x65])
    rom.write_bytes(0x2533642, [0x00, 0x50])
    rom.write_byte(0x253389D, 0x74)
    rom.write_bytes(0x25338A4, [0x00, 0x72, 0x00, 0x75, 0x00, 0x79])
    rom.write_bytes(0x25338BC, [0xFF, 0xFF])
    rom.write_bytes(0x25338C2, [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF])
    rom.write_bytes(0x25339C2, [0x00, 0x75, 0x00, 0x76])
    rom.write_bytes(0x2533830, [0x00, 0x31, 0x00, 0x81, 0x00, 0x82, 0x00, 0x82])

    # Speed Bridge of Light cutscene
    rom.write_bytes(0x292D644, [0x00, 0x00, 0x00, 0xA0])
    rom.write_bytes(0x292D680, [0x00, 0x02, 0x00, 0x0A, 0x00, 0x6C, 0x00, 0x00])
    rom.write_bytes(0x292D6E8, [0x00, 0x27])
    rom.write_bytes(0x292D718, [0x00, 0x32])
    rom.write_bytes(0x292D810, [0x00, 0x02, 0x00, 0x3C])
    rom.write_bytes(0x292D924, [0xFF, 0xFF, 0x00, 0x14, 0x00, 0x96, 0xFF, 0xFF])

    #Speed Pushing of All Pushable Objects
    rom.write_bytes(0xDD2B86, [0x40, 0x80])             #block speed
    rom.write_bytes(0xDD2D26, [0x00, 0x01])             #block delay
    rom.write_bytes(0xDD9682, [0x40, 0x80])             #milk crate speed
    rom.write_bytes(0xDD981E, [0x00, 0x01])             #milk crate delay
    rom.write_bytes(0xCE1BD0, [0x40, 0x80, 0x00, 0x00]) #amy puzzle speed
    rom.write_bytes(0xCE0F0E, [0x00, 0x01])             #amy puzzle delay
    rom.write_bytes(0xC77CA8, [0x40, 0x80, 0x00, 0x00]) #fire block speed
    rom.write_bytes(0xC770C2, [0x00, 0x01])             #fire block delay
    rom.write_bytes(0xCC5DBC, [0x29, 0xE1, 0x00, 0x01]) #forest basement puzzle delay
    rom.write_bytes(0xDBCF70, [0x2B, 0x01, 0x00, 0x00]) #spirit cobra mirror startup
    rom.write_bytes(0xDBCF70, [0x2B, 0x01, 0x00, 0x01]) #spirit cobra mirror delay
    rom.write_bytes(0xDBA230, [0x28, 0x41, 0x00, 0x19]) #truth spinner speed
    rom.write_bytes(0xDBA3A4, [0x24, 0x18, 0x00, 0x00]) #truth spinner delay

    #Speed Deku Seed Upgrade Scrub Cutscene
    rom.write_bytes(0xECA900, [0x24, 0x03, 0xC0, 0x00]) #scrub angle
    rom.write_bytes(0xECAE90, [0x27, 0x18, 0xFD, 0x04]) #skip straight to giving item
    rom.write_bytes(0xECB618, [0x25, 0x6B, 0x00, 0xD4]) #skip straight to digging back in
    rom.write_bytes(0xECAE70, [0x00, 0x00, 0x00, 0x00]) #never initialize cs camera
    rom.write_bytes(0xE5972C, [0x24, 0x08, 0x00, 0x01]) #timer set to 1 frame for giving item

    # Remove remaining owls
    rom.write_bytes(0x1FE30CE, [0x01, 0x4B])
    rom.write_bytes(0x1FE30DE, [0x01, 0x4B])
    rom.write_bytes(0x1FE30EE, [0x01, 0x4B])
    rom.write_bytes(0x205909E, [0x00, 0x3F])
    rom.write_byte(0x2059094, 0x80)

    # Darunia won't dance
    rom.write_bytes(0x22769E4, [0xFF, 0xFF, 0xFF, 0xFF])

    # Zora moves quickly
    rom.write_bytes(0xE56924, [0x00, 0x00, 0x00, 0x00])

    # Speed Jabu Jabu swallowing Link
    rom.write_bytes(0xCA0784, [0x00, 0x18, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02])

    # Ruto no longer points to Zora Sapphire
    rom.write_bytes(0xD03BAC, [0xFF, 0xFF, 0xFF, 0xFF])

    # Ruto never disappears from Jabu Jabu's Belly
    rom.write_byte(0xD01EA3, 0x00)

    #Shift octorock in jabu forward
    rom.write_bytes(0x275906E, [0xFF, 0xB3, 0xFB, 0x20, 0xF9, 0x56])

    #Move fire/forest temple switches down 1 unit to make it easier to press
    rom.write_bytes(0x24860A8, [0xFC, 0xF4]) #forest basement 1
    rom.write_bytes(0x24860C8, [0xFC, 0xF4]) #forest basement 2
    rom.write_bytes(0x24860E8, [0xFC, 0xF4]) #forest basement 3
    rom.write_bytes(0x236C148, [0x11, 0x93]) #fire hammer room

    # Speed up Epona race start
    rom.write_bytes(0x29BE984, [0x00, 0x00, 0x00, 0x02])
    rom.write_bytes(0x29BE9CA, [0x00, 0x01, 0x00, 0x02])

    # Speed start of Horseback Archery
    #rom.write_bytes(0x21B2064, [0x00, 0x00, 0x00, 0x02])
    #rom.write_bytes(0x21B20AA, [0x00, 0x01, 0x00, 0x02])

    # Speed up Epona escape
    rom.write_bytes(0x1FC8B36, [0x00, 0x2A])

    # Speed up draining the well
    rom.write_bytes(0xE0A010, [0x00, 0x2A, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02])
    rom.write_bytes(0x2001110, [0x00, 0x2B, 0x00, 0xB7, 0x00, 0xB8, 0x00, 0xB8])

    # Speed up opening the royal tomb for both child and adult
    rom.write_bytes(0x2025026, [0x00, 0x01])
    rom.write_bytes(0x2023C86, [0x00, 0x01])
    rom.write_byte(0x2025159, 0x02)
    rom.write_byte(0x2023E19, 0x02)

    #Speed opening of Door of Time
    rom.write_bytes(0xE0A176, [0x00, 0x02])
    rom.write_bytes(0xE0A35A, [0x00, 0x01, 0x00, 0x02])

    # Speed up Lake Hylia Owl Flight
    rom.write_bytes(0x20E60D2, [0x00, 0x01])

    # Speed up Death Mountain Trail Owl Flight
    rom.write_bytes(0x223B6B2, [0x00, 0x01])

    # Poacher's Saw no longer messes up Forest Stage
    rom.write_bytes(0xAE72CC, [0x00, 0x00, 0x00, 0x00])

    # Change Prelude CS to check for medallion
    rom.write_bytes(0x00C805E6, [0x00, 0xA6])
    rom.write_bytes(0x00C805F2, [0x00, 0x01])

    # Change Nocturne CS to check for medallions
    rom.write_bytes(0x00ACCD8E, [0x00, 0xA6])
    rom.write_bytes(0x00ACCD92, [0x00, 0x01])
    rom.write_bytes(0x00ACCD9A, [0x00, 0x02])
    rom.write_bytes(0x00ACCDA2, [0x00, 0x04])

    # Change King Zora to move even if Zora Sapphire is in inventory
    rom.write_bytes(0x00E55BB0, [0x85, 0xCE, 0x8C, 0x3C])
    rom.write_bytes(0x00E55BB4, [0x84, 0x4F, 0x0E, 0xDA])

    # Remove extra Forest Temple medallions
    rom.write_bytes(0x00D4D37C, [0x00, 0x00, 0x00, 0x00])

    # Remove extra Fire Temple medallions
    rom.write_bytes(0x00AC9754, [0x00, 0x00, 0x00, 0x00])
    rom.write_bytes(0x00D0DB8C, [0x00, 0x00, 0x00, 0x00])

    # Remove extra Water Temple medallions
    rom.write_bytes(0x00D57F94, [0x00, 0x00, 0x00, 0x00])

    # Remove extra Spirit Temple medallions
    rom.write_bytes(0x00D370C4, [0x00, 0x00, 0x00, 0x00])
    rom.write_bytes(0x00D379C4, [0x00, 0x00, 0x00, 0x00])

    # Remove extra Shadow Temple medallions
    rom.write_bytes(0x00D116E0, [0x00, 0x00, 0x00, 0x00])

    # Change Mido, Saria, and Kokiri to check for Deku Tree complete flag
    # bitwise pointer for 0x80
    kokiriAddresses = [0xE52836, 0xE53A56, 0xE51D4E, 0xE51F3E, 0xE51D96, 0xE51E1E, 0xE51E7E, 0xE51EDE, 0xE51FC6, 0xE51F96, 0xE293B6, 0xE29B8E, 0xE62EDA, 0xE630D6, 0xE633AA, 0xE6369E]
    for kokiri in kokiriAddresses:
        rom.write_bytes(kokiri, [0x8C, 0x0C])
    # Kokiri
    rom.write_bytes(0xE52838, [0x94, 0x48, 0x0E, 0xD4])
    rom.write_bytes(0xE53A58, [0x94, 0x49, 0x0E, 0xD4])
    rom.write_bytes(0xE51D50, [0x94, 0x58, 0x0E, 0xD4])
    rom.write_bytes(0xE51F40, [0x94, 0x4B, 0x0E, 0xD4])
    rom.write_bytes(0xE51D98, [0x94, 0x4B, 0x0E, 0xD4])
    rom.write_bytes(0xE51E20, [0x94, 0x4A, 0x0E, 0xD4])
    rom.write_bytes(0xE51E80, [0x94, 0x59, 0x0E, 0xD4])
    rom.write_bytes(0xE51EE0, [0x94, 0x4E, 0x0E, 0xD4])
    rom.write_bytes(0xE51FC8, [0x94, 0x49, 0x0E, 0xD4])
    rom.write_bytes(0xE51F98, [0x94, 0x58, 0x0E, 0xD4])
    # Saria
    rom.write_bytes(0xE293B8, [0x94, 0x78, 0x0E, 0xD4])
    rom.write_bytes(0xE29B90, [0x94, 0x68, 0x0E, 0xD4])
    # Mido
    rom.write_bytes(0xE62EDC, [0x94, 0x6F, 0x0E, 0xD4])
    rom.write_bytes(0xE630D8, [0x94, 0x4F, 0x0E, 0xD4])
    rom.write_bytes(0xE633AC, [0x94, 0x68, 0x0E, 0xD4])
    rom.write_bytes(0xE636A0, [0x94, 0x48, 0x0E, 0xD4])

    # Change adult Kokiri Forest to check for Forest Temple complete flag
    rom.write_bytes(0xE5369E, [0xB4, 0xAC])
    rom.write_bytes(0xD5A83C, [0x80, 0x49, 0x0E, 0xDC])

    # Change adult Goron City to check for Fire Temple complete flag
    rom.write_bytes(0xED59DC, [0x80, 0xC9, 0x0E, 0xDC])

    # Change Pokey to check DT complete flag
    rom.write_bytes(0xE5400A, [0x8C, 0x4C])
    rom.write_bytes(0xE5400E, [0xB4, 0xA4])
    if world.open_forest != 'closed':
        rom.write_bytes(0xE5401C, [0x14, 0x0B])

    # Fix Shadow Temple to check for different rewards for scene
    rom.write_bytes(0xCA3F32, [0x00, 0x00, 0x25, 0x4A, 0x00, 0x10])

    # Fix Spirit Temple to check for different rewards for scene
    rom.write_bytes(0xCA3EA2, [0x00, 0x00, 0x25, 0x4A, 0x00, 0x08])

    # Fix Biggoron to check a different flag.
    rom.write_byte(0xED329B, 0x72)
    rom.write_byte(0xED43E7, 0x72)
    rom.write_bytes(0xED3370, [0x3C, 0x0D, 0x80, 0x12])
    rom.write_bytes(0xED3378, [0x91, 0xB8, 0xA6, 0x42, 0xA1, 0xA8, 0xA6, 0x42])
    rom.write_bytes(0xED6574, [0x00, 0x00, 0x00, 0x00])

    # Remove the check on the number of days that passed for claim check.
    rom.write_bytes(0xED4470, [0x00, 0x00, 0x00, 0x00])
    rom.write_bytes(0xED4498, [0x00, 0x00, 0x00, 0x00])

    # Fixed reward order for Bombchu Bowling
    rom.write_bytes(0xE2E698, [0x80, 0xAA, 0xE2, 0x64])
    rom.write_bytes(0xE2E6A0, [0x80, 0xAA, 0xE2, 0x4C])
    rom.write_bytes(0xE2D440, [0x24, 0x19, 0x00, 0x00])

    # Offset kakariko carpenter starting position
    rom.write_bytes(0x1FF93A4, [0x01, 0x8D, 0x00, 0x11, 0x01, 0x6C, 0xFF, 0x92, 0x00, 0x00, 0x01, 0x78, 0xFF, 0x2E, 0x00, 0x00, 0x00, 0x03, 0xFD, 0x2B, 0x00, 0xC8, 0xFF, 0xF9, 0xFD, 0x03, 0x00, 0xC8, 0xFF, 0xA9, 0xFD, 0x5D, 0x00, 0xC8, 0xFE, 0x5F]) # re order the carpenter's path
    rom.write_byte(0x1FF93D0, 0x06) # set the path points to 6
    rom.write_bytes(0x20160B6, [0x01, 0x8D, 0x00, 0x11, 0x01, 0x6C]) # set the carpenter's start position

    # Give hp after first ocarina minigame round
    rom.write_bytes(0xDF2204, [0x24, 0x03, 0x00, 0x02])

    # Allow owl to always carry the kid down Death Mountain
    rom.write_bytes(0xE304F0, [0x24, 0x0E, 0x00, 0x01])

    # Fix Vanilla Dodongo's Cavern Gossip Stone to not use a permanent flag for the fairy
    if not world.dungeon_mq['Dodongos Cavern']:
        rom.write_byte(0x1F281FE, 0x38)

    # Fix "...???" textbox outside Child Colossus Fairy to use the right flag and disappear once the wall is destroyed
    rom.write_byte(0x21A026F, 0xDD)

    # Remove the "...???" textbox outside the Crater Fairy (change it to an actor that does nothing)
    rom.write_int16s(0x225E7DC, [0x00B5, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xFFFF])

    # Forbid Sun's Song from a bunch of cutscenes
    Suns_scenes = [0x2016FC9, 0x2017219, 0x20173D9, 0x20174C9, 0x2017679, 0x20C1539, 0x20C15D9, 0x21A0719, 0x21A07F9, 0x2E90129, 0x2E901B9, 0x2E90249, 0x225E829, 0x225E939, 0x306D009]
    for address in Suns_scenes:
        rom.write_byte(address,0x01)

    # Allow Warp Songs in additional places
    rom.write_byte(0xB6D3D2, 0x00) # Gerudo Training Ground
    rom.write_byte(0xB6D42A, 0x00) # Inside Ganon's Castle

    #Tell Sheik at Ice Cavern we are always an Adult
    rom.write_int32(0xC7B9C0, 0x00000000)
    rom.write_int32(0xC7BAEC, 0x00000000)
    rom.write_int32(0xc7BCA4, 0x00000000)

    # Allow Farore's Wind in dungeons where it's normally forbidden
    rom.write_byte(0xB6D3D3, 0x00) # Gerudo Training Ground
    rom.write_byte(0xB6D42B, 0x00) # Inside Ganon's Castle

    # Remove disruptive text from Gerudo Training Ground and early Shadow Temple (vanilla)
    Wonder_text = [0x27C00BC, 0x27C00CC, 0x27C00DC, 0x27C00EC, 0x27C00FC, 0x27C010C, 0x27C011C, 0x27C012C, 0x27CE080,
                   0x27CE090, 0x2887070, 0x2887080, 0x2887090, 0x2897070, 0x28C7134, 0x28D91BC, 0x28A60F4, 0x28AE084,
                   0x28B9174, 0x28BF168, 0x28BF178, 0x28BF188, 0x28A1144, 0x28A6104, 0x28D0094]
    for address in Wonder_text:
        rom.write_byte(address, 0xFB)

    # Speed dig text for Dampe
    rom.write_bytes(0x9532F8, [0x08, 0x08, 0x08, 0x59])

    # Make item descriptions into a single box
    Short_item_descriptions = [0x92EC84, 0x92F9E3, 0x92F2B4, 0x92F37A, 0x92F513, 0x92F5C6, 0x92E93B, 0x92EA12]
    for address in Short_item_descriptions:
        rom.write_byte(address,0x02)

    et_original = rom.read_bytes(0xB6FBF0, 4 * 0x0614)

    exit_updates = []

    def copy_entrance_record(source_index, destination_index, count=4):
        ti = source_index * 4
        rom.write_bytes(0xB6FBF0 + destination_index * 4, et_original[ti:ti+(4 * count)])

    def generate_exit_lookup_table():
        # Assumes that the last exit on a scene's exit list cannot be 0000
        exit_table = {
            0x0028: [0xAC95C2] #Jabu with the fish is entered from a cutscene hardcode
            }

        def add_scene_exits(scene_start, offset = 0):
            current = scene_start + offset
            exit_list_start_off = 0
            exit_list_end_off = 0
            command = 0

            while command != 0x14:
                command = rom.read_byte(current)
                if command == 0x18: # Alternate header list
                    header_list = scene_start + (rom.read_int32(current + 4) & 0x00FFFFFF)
                    for alt_id in range(0,3):
                        header_offset = rom.read_int32(header_list) & 0x00FFFFFF
                        if header_offset != 0:
                            add_scene_exits(scene_start, header_offset)
                        header_list += 4
                if command == 0x13: # Exit List
                    exit_list_start_off = rom.read_int32(current + 4) & 0x00FFFFFF
                if command == 0x0F: # Lighting list, follows exit list
                    exit_list_end_off = rom.read_int32(current + 4) & 0x00FFFFFF
                current += 8

            if exit_list_start_off == 0 or exit_list_end_off == 0:
                return

            # calculate the exit list length
            list_length = (exit_list_end_off - exit_list_start_off) // 2
            last_id = rom.read_int16(scene_start + exit_list_end_off - 2)
            if last_id == 0:
                list_length -= 1

            # update
            addr = scene_start + exit_list_start_off
            for _ in range(0, list_length):
                index = rom.read_int16(addr)
                if index not in exit_table:
                    exit_table[index] = []
                exit_table[index].append(addr)
                addr += 2

        scene_table = 0x00B71440
        for scene in range(0x00, 0x65):
            scene_start = rom.read_int32(scene_table + (scene * 0x14));
            add_scene_exits(scene_start)

        return exit_table


    def set_entrance_updates(entrances):
        for entrance in entrances:
            new_entrance = entrance.data
            replaced_entrance = entrance.replaces.data

            exit_updates.append((new_entrance['index'], replaced_entrance['index']))

            for address in new_entrance.get('addresses', []):
                rom.write_int16(address, replaced_entrance['index'])

            if "blue_warp" in new_entrance:
                if "blue_warp" in replaced_entrance:
                    blue_out_data =  replaced_entrance["blue_warp"]
                else:
                    blue_out_data = replaced_entrance["index"]
                # Blue warps have multiple hardcodes leading to them. The good news is
                # the blue warps (excluding deku sprout and lake fill special cases) each
                # have a nice consistent 4-entry in the table we can just shuffle. So just
                # catch all the hardcode with entrance table rewrite. This covers the
                # Forest temple and Water temple blue warp revisits. Deku sprout remains
                # vanilla as it never took you to the exit and the lake fill is handled
                # above by removing the cutscene completely. Child has problems with Adult
                # blue warps, so always use the return entrance if a child.
                copy_entrance_record(blue_out_data + 2, new_entrance["blue_warp"] + 2, 2)
                copy_entrance_record(replaced_entrance["index"], new_entrance["blue_warp"], 2)

    exit_table = generate_exit_lookup_table()

    if world.disable_trade_revert:
        # Disable trade quest timers and prevent trade items from ever reverting
        rom.write_byte(rom.sym('DISABLE_TIMERS'), 0x01)
        rom.write_int16s(0xB6D460, [0x0030, 0x0035, 0x0036]) # Change trade items revert table to prevent all reverts

    if world.shuffle_overworld_entrances:
        rom.write_byte(rom.sym('OVERWORLD_SHUFFLED'), 1)

        # Prevent the ocarina cutscene from leading straight to hyrule field
        rom.write_byte(rom.sym('OCARINAS_SHUFFLED'), 1)

        # Combine all fence hopping LLR exits to lead to the main LLR exit
        for k in [0x028A, 0x028E, 0x0292]: # Southern, Western, Eastern Gates
            exit_table[0x01F9] += exit_table[k] # Hyrule Field entrance from Lon Lon Ranch (main land entrance)
            del exit_table[k]
        exit_table[0x01F9].append(0xD52722) # 0x0476, Front Gate

        # Combine the water exits between Hyrule Field and Zora River to lead to the land entrance instead of the water entrance
        exit_table[0x00EA] += exit_table[0x01D9] # Hyrule Field -> Zora River
        exit_table[0x0181] += exit_table[0x0311] # Zora River -> Hyrule Field
        del exit_table[0x01D9]
        del exit_table[0x0311]

        # Change Impa escorts to bring link at the hyrule castle grounds entrance from market, instead of hyrule field
        rom.write_int16(0xACAA2E, 0x0138) # 1st Impa escort
        rom.write_int16(0xD12D6E, 0x0138) # 2nd+ Impa escort

    if world.shuffle_dungeon_entrances:
        rom.write_byte(rom.sym('DUNGEONS_SHUFFLED'), 1)

        # Connect lake hylia fill exit to revisit exit
        rom.write_int16(0xAC995A, 0x060C)

        # Tell the well water we are always a child.
        rom.write_int32(0xDD5BF4, 0x00000000)

        # Make the Adult well blocking stone dissappear if the well has been drained by
        # checking the well drain event flag instead of links age. This actor doesn't need a
        # code check for links age as the stone is absent for child via the scene alternate
        # lists. So replace the age logic with drain logic.
        rom.write_int32(0xE2887C, rom.read_int32(0xE28870)) # relocate this to nop delay slot
        rom.write_int32(0xE2886C, 0x95CEB4B0) # lhu
        rom.write_int32(0xE28870, 0x31CE0080) # andi

        remove_entrance_blockers(rom)

        # Purge temp flags on entrance to spirit from colossus through the front door.
        rom.write_byte(0x021862E3, 0xC2)

    if world.shuffle_overworld_entrances or world.shuffle_dungeon_entrances:
        # Remove deku sprout and drop player at SFM after forest completion
        rom.write_int16(0xAC9F96, 0x0608)

    if world.spawn_positions:
        # Fix save warping inside Link's House to not be a special case
        rom.write_int32(0xB06318, 0x00000000)

    # Set entrances to update, except grotto entrances which are handled on their own at a later point
    set_entrance_updates(filter(lambda entrance: entrance.type != 'Grotto', world.get_shuffled_entrances()))

    for k, v in [(k,v) for k, v in exit_updates if k in exit_table]:
        for addr in exit_table[k]:
            rom.write_int16(addr, v)

    # Fix text for Pocket Cucco.
    rom.write_byte(0xBEEF45, 0x0B)

    # Fix stupid alcove cameras in Ice Cavern -- thanks to krim and mzx for the help
    rom.write_byte(0x2BECA25,0x01)
    rom.write_byte(0x2BECA2D,0x01)

    configure_dungeon_info(rom, world)

    hash_icons = 0
    for i,icon in enumerate(world.file_hash):
        hash_icons |= (icon << (5 * i))
    rom.write_int32(rom.sym('cfg_file_select_hash'), hash_icons)

    save_context = SaveContext()

    # Initial Save Data
    if not world.useful_cutscenes:
        save_context.write_bits(0x00D4 + 0x03 * 0x1C + 0x04 + 0x0, 0x08) # Forest Temple switch flag (Poe Sisters cutscene)
    save_context.write_bits(0x00D4 + 0x05 * 0x1C + 0x04 + 0x1, 0x01) # Water temple switch flag (Ruto)
    save_context.write_bits(0x00D4 + 0x51 * 0x1C + 0x04 + 0x2, 0x08) # Hyrule Field switch flag (Owl)
    save_context.write_bits(0x00D4 + 0x55 * 0x1C + 0x04 + 0x0, 0x80) # Kokiri Forest switch flag (Owl)
    save_context.write_bits(0x00D4 + 0x56 * 0x1C + 0x04 + 0x2, 0x40) # Sacred Forest Meadow switch flag (Owl)
    save_context.write_bits(0x00D4 + 0x5B * 0x1C + 0x04 + 0x2, 0x01) # Lost Woods switch flag (Owl)
    save_context.write_bits(0x00D4 + 0x5B * 0x1C + 0x04 + 0x3, 0x80) # Lost Woods switch flag (Owl)
    save_context.write_bits(0x00D4 + 0x5C * 0x1C + 0x04 + 0x0, 0x80) # Desert Colossus switch flag (Owl)
    save_context.write_bits(0x00D4 + 0x5F * 0x1C + 0x04 + 0x3, 0x20) # Hyrule Castle switch flag (Owl)

    save_context.write_bits(0x0ED4, 0x10) # "Met Deku Tree"
    save_context.write_bits(0x0ED5, 0x20) # "Deku Tree Opened Mouth"
    save_context.write_bits(0x0ED6, 0x08) # "Rented Horse From Ingo"
    save_context.write_bits(0x0ED6, 0x10) # "Spoke to Mido After Deku Tree's Death"
    save_context.write_bits(0x0EDA, 0x08) # "Began Nabooru Battle"
    save_context.write_bits(0x0EDC, 0x80) # "Entered the Master Sword Chamber"
    save_context.write_bits(0x0EDD, 0x20) # "Pulled Master Sword from Pedestal"
    save_context.write_bits(0x0EE0, 0x80) # "Spoke to Kaepora Gaebora by Lost Woods"
    save_context.write_bits(0x0EE7, 0x20) # "Nabooru Captured by Twinrova"
    save_context.write_bits(0x0EE7, 0x10) # "Spoke to Nabooru in Spirit Temple"
    save_context.write_bits(0x0EED, 0x20) # "Sheik, Spawned at Master Sword Pedestal as Adult"
    save_context.write_bits(0x0EED, 0x01) # "Nabooru Ordered to Fight by Twinrova"
    save_context.write_bits(0x0EED, 0x80) # "Watched Ganon's Tower Collapse / Caught by Gerudo"
    save_context.write_bits(0x0EF9, 0x01) # "Greeted by Saria"
    save_context.write_bits(0x0F0A, 0x04) # "Spoke to Ingo Once as Adult"
    save_context.write_bits(0x0F0F, 0x40) # "Met Poe Collector in Ruined Market"
    if not world.useful_cutscenes:
        save_context.write_bits(0x0F1A, 0x04) # "Met Darunia in Fire Temple"

    save_context.write_bits(0x0ED7, 0x01) # "Spoke to Child Malon at Castle or Market"
    save_context.write_bits(0x0ED7, 0x20) # "Spoke to Child Malon at Ranch"
    save_context.write_bits(0x0ED7, 0x40) # "Invited to Sing With Child Malon"
    save_context.write_bits(0x0F09, 0x10) # "Met Child Malon at Castle or Market"
    save_context.write_bits(0x0F09, 0x20) # "Child Malon Said Epona Was Scared of You"

    save_context.write_bits(0x0F21, 0x04) # "Ruto in JJ (M3) Talk First Time"
    save_context.write_bits(0x0F21, 0x02) # "Ruto in JJ (M2) Meet Ruto"

    save_context.write_bits(0x0EE2, 0x01) # "Began Ganondorf Battle"
    save_context.write_bits(0x0EE3, 0x80) # "Began Bongo Bongo Battle"
    save_context.write_bits(0x0EE3, 0x40) # "Began Barinade Battle"
    save_context.write_bits(0x0EE3, 0x20) # "Began Twinrova Battle"
    save_context.write_bits(0x0EE3, 0x10) # "Began Morpha Battle"
    save_context.write_bits(0x0EE3, 0x08) # "Began Volvagia Battle"
    save_context.write_bits(0x0EE3, 0x04) # "Began Phantom Ganon Battle"
    save_context.write_bits(0x0EE3, 0x02) # "Began King Dodongo Battle"
    save_context.write_bits(0x0EE3, 0x01) # "Began Gohma Battle"

    save_context.write_bits(0x0EE8, 0x01) # "Entered Deku Tree"
    save_context.write_bits(0x0EE9, 0x80) # "Entered Temple of Time"
    save_context.write_bits(0x0EE9, 0x40) # "Entered Goron City"
    save_context.write_bits(0x0EE9, 0x20) # "Entered Hyrule Castle"
    save_context.write_bits(0x0EE9, 0x10) # "Entered Zora's Domain"
    save_context.write_bits(0x0EE9, 0x08) # "Entered Kakariko Village"
    save_context.write_bits(0x0EE9, 0x02) # "Entered Death Mountain Trail"
    save_context.write_bits(0x0EE9, 0x01) # "Entered Hyrule Field"
    save_context.write_bits(0x0EEA, 0x04) # "Entered Ganon's Castle (Exterior)"
    save_context.write_bits(0x0EEA, 0x02) # "Entered Death Mountain Crater"
    save_context.write_bits(0x0EEA, 0x01) # "Entered Desert Colossus"
    save_context.write_bits(0x0EEB, 0x80) # "Entered Zora's Fountain"
    save_context.write_bits(0x0EEB, 0x40) # "Entered Graveyard"
    save_context.write_bits(0x0EEB, 0x20) # "Entered Jabu-Jabu's Belly"
    save_context.write_bits(0x0EEB, 0x10) # "Entered Lon Lon Ranch"
    save_context.write_bits(0x0EEB, 0x08) # "Entered Gerudo's Fortress"
    save_context.write_bits(0x0EEB, 0x04) # "Entered Gerudo Valley"
    save_context.write_bits(0x0EEB, 0x02) # "Entered Lake Hylia"
    save_context.write_bits(0x0EEB, 0x01) # "Entered Dodongo's Cavern"
    save_context.write_bits(0x0F08, 0x08) # "Entered Hyrule Castle"

    # Set the number of chickens to collect
    rom.write_byte(0x00E1E523, world.chicken_count)

    # Change Anju to always say how many chickens are needed
    # Does not affect text for collecting item or afterwards
    rom.write_int16(0x00E1F3C2, 0x5036)
    rom.write_int16(0x00E1F3C4, 0x5036)
    rom.write_int16(0x00E1F3C6, 0x5036)
    rom.write_int16(0x00E1F3C8, 0x5036)
    rom.write_int16(0x00E1F3CA, 0x5036)
    rom.write_int16(0x00E1F3CC, 0x5036)

    # Make the Kakariko Gate not open with the MS
    if world.open_kakariko != 'open':
        rom.write_int32(0xDD3538, 0x34190000) # li t9, 0
    if world.open_kakariko != 'closed':
        rom.write_byte(rom.sym('OPEN_KAKARIKO'), 1)

    if world.complete_mask_quest:
        rom.write_byte(rom.sym('COMPLETE_MASK_QUEST'), 1)

    if world.skip_child_zelda:
        save_context.give_item('Zeldas Letter')
        # Archipelago forces this item to be local so it can always be given to the player. Usually it's a song so it's no problem.
        item = world.get_location('Song from Impa').item
        save_context.give_raw_item(item.name)
        if item.name == 'Slingshot':
            save_context.give_raw_item("Deku Seeds (30)")
        elif item.name == 'Bow': 
            save_context.give_raw_item("Arrows (30)")
        elif item.name == 'Bomb Bag': 
            save_context.give_raw_item("Bombs (20)")
        save_context.write_bits(0x0ED7, 0x04) # "Obtained Malon's Item"
        save_context.write_bits(0x0ED7, 0x08) # "Woke Talon in castle"
        save_context.write_bits(0x0ED7, 0x10) # "Talon has fled castle"
        save_context.write_bits(0x0EDD, 0x01) # "Obtained Zelda's Letter"
        save_context.write_bits(0x0EDE, 0x02) # "Learned Zelda's Lullaby"
        save_context.write_bits(0x00D4 + 0x5F * 0x1C + 0x04 + 0x3, 0x10) # "Moved crates to access the courtyard"
        if world.open_kakariko != 'closed':
            save_context.write_bits(0x0F07, 0x40) # "Spoke to Gate Guard About Mask Shop"
        if world.complete_mask_quest:
            save_context.write_bits(0x0F07, 0x80) # "Soldier Wears Keaton Mask"
            save_context.write_bits(0x0EF6, 0x8F) # "Sold Masks & Unlocked Masks" / "Obtained Mask of Truth"
            save_context.write_bits(0x0EE4, 0xF0) # "Paid Back Mask Fees"

    if world.zora_fountain == 'open':
        save_context.write_bits(0x0EDB, 0x08) # "Moved King Zora"
    elif world.zora_fountain == 'adult':
        rom.write_byte(rom.sym('MOVED_ADULT_KING_ZORA'), 1)

    # Make all chest opening animations fast
    rom.write_byte(rom.sym('FAST_CHESTS'), int(world.fast_chests))


    # Set up Rainbow Bridge conditions
    symbol = rom.sym('RAINBOW_BRIDGE_CONDITION')
    count_symbol = rom.sym('RAINBOW_BRIDGE_COUNT')
    if world.bridge == 'open':
        rom.write_int32(symbol, 0)
        save_context.write_bits(0xEDC, 0x20) # "Rainbow Bridge Built by Sages"
    elif world.bridge == 'medallions':
        rom.write_int32(symbol, 1)
        rom.write_int16(count_symbol, world.bridge_medallions)
    elif world.bridge == 'dungeons':
        rom.write_int32(symbol, 2)
        rom.write_int16(count_symbol, world.bridge_rewards)
    elif world.bridge == 'stones':
        rom.write_int32(symbol, 3)
        rom.write_int16(count_symbol, world.bridge_stones)
    elif world.bridge == 'vanilla':
        rom.write_int32(symbol, 4)
    elif world.bridge == 'tokens':
        rom.write_int32(symbol, 5)
        rom.write_int16(count_symbol, world.bridge_tokens)

    if world.triforce_hunt:
        rom.write_int16(rom.sym('triforce_pieces_requied'), world.triforce_goal)
        rom.write_int16(rom.sym('triforce_hunt_enabled'), 1)

    # Set up LACS conditions.
    symbol = rom.sym('LACS_CONDITION')
    count_symbol = rom.sym('LACS_CONDITION_COUNT')
    if world.lacs_condition == 'medallions':
        rom.write_int32(symbol, 1)
        rom.write_int16(count_symbol, world.lacs_medallions)
    elif world.lacs_condition == 'dungeons':
        rom.write_int32(symbol, 2)
        rom.write_int16(count_symbol, world.lacs_rewards)
    elif world.lacs_condition == 'stones':
        rom.write_int32(symbol, 3)
        rom.write_int16(count_symbol, world.lacs_stones)
    elif world.lacs_condition == 'tokens':
        rom.write_int32(symbol, 4)
        rom.write_int16(count_symbol, world.lacs_tokens)
    else:
        rom.write_int32(symbol, 0)

    if world.open_forest == 'open':
        save_context.write_bits(0xED5, 0x10) # "Showed Mido Sword & Shield"

    if world.open_door_of_time:
        save_context.write_bits(0xEDC, 0x08) # "Opened the Door of Time"

    # "fast-ganon" stuff
    symbol = rom.sym('NO_ESCAPE_SEQUENCE')
    if world.no_escape_sequence:
        rom.write_bytes(0xD82A12, [0x05, 0x17]) # Sets exit from Ganondorf fight to entrance to Ganon fight
        rom.write_bytes(0xB139A2, [0x05, 0x17]) # Sets Ganon deathwarp back to Ganon
        rom.write_byte(symbol, 0x01)
    else:
        rom.write_byte(symbol, 0x00)
    if world.skipped_trials['Forest']:
        save_context.write_bits(0x0EEA, 0x08) # "Completed Forest Trial"
    if world.skipped_trials['Fire']:
        save_context.write_bits(0x0EEA, 0x40) # "Completed Fire Trial"
    if world.skipped_trials['Water']:
        save_context.write_bits(0x0EEA, 0x10) # "Completed Water Trial"
    if world.skipped_trials['Spirit']:
        save_context.write_bits(0x0EE8, 0x20) # "Completed Spirit Trial"
    if world.skipped_trials['Shadow']:
        save_context.write_bits(0x0EEA, 0x20) # "Completed Shadow Trial"
    if world.skipped_trials['Light']:
        save_context.write_bits(0x0EEA, 0x80) # "Completed Light Trial"
    if world.trials == 0:
        save_context.write_bits(0x0EED, 0x08) # "Dispelled Ganon's Tower Barrier"

    # open gerudo fortress
    if world.gerudo_fortress == 'open':
        if not world.shuffle_gerudo_card:
            save_context.write_bits(0x00A5, 0x40) # Give Gerudo Card
        save_context.write_bits(0x0EE7, 0x0F) # Free all 4 carpenters
        save_context.write_bits(0x00D4 + 0x0C * 0x1C + 0x04 + 0x1, 0x0F) # Thieves' Hideout switch flags (started all fights)
        save_context.write_bits(0x00D4 + 0x0C * 0x1C + 0x04 + 0x2, 0x01) # Thieves' Hideout switch flags (heard yells/unlocked doors)
        save_context.write_bits(0x00D4 + 0x0C * 0x1C + 0x04 + 0x3, 0xFE) # Thieves' Hideout switch flags (heard yells/unlocked doors)
        save_context.write_bits(0x00D4 + 0x0C * 0x1C + 0x0C + 0x2, 0xD4) # Thieves' Hideout collection flags (picked up keys, marks fights finished as well)
    elif world.gerudo_fortress == 'fast':
        save_context.write_bits(0x0EE7, 0x0E) # Free 3 carpenters
        save_context.write_bits(0x00D4 + 0x0C * 0x1C + 0x04 + 0x1, 0x0D) # Thieves' Hideout switch flags (started all fights)
        save_context.write_bits(0x00D4 + 0x0C * 0x1C + 0x04 + 0x2, 0x01) # Thieves' Hideout switch flags (heard yells/unlocked doors)
        save_context.write_bits(0x00D4 + 0x0C * 0x1C + 0x04 + 0x3, 0xDC) # Thieves' Hideout switch flags (heard yells/unlocked doors)
        save_context.write_bits(0x00D4 + 0x0C * 0x1C + 0x0C + 0x2, 0xC4) # Thieves' Hideout collection flags (picked up keys, marks fights finished as well)

    # Add a gate-opening guard on the Wasteland side of the Gerudo gate when the card is shuffled or certain levels of ER.
    # Overrides the generic guard at the bottom of the ladder in Gerudo Fortress
    if world.shuffle_gerudo_card or world.shuffle_overworld_entrances or \
       world.shuffle_special_interior_entrances or world.spawn_positions:
        # Add a gate opening guard on the Wasteland side of the Gerudo Fortress' gate
        new_gate_opening_guard = [0x0138, 0xFAC8, 0x005D, 0xF448, 0x0000, 0x95B0, 0x0000, 0x0301]
        rom.write_int16s(0x21BD3EC, new_gate_opening_guard)  # Adult Day
        rom.write_int16s(0x21BD62C, new_gate_opening_guard)  # Adult Night

    # start with maps/compasses
    if world.shuffle_mapcompass == 'startwith':
        for dungeon in ['deku', 'dodongo', 'jabu', 'forest', 'fire', 'water', 'spirit', 'shadow', 'botw', 'ice']:
            save_context.addresses['dungeon_items'][dungeon]['compass'].value = True
            save_context.addresses['dungeon_items'][dungeon]['map'].value = True

    if world.shuffle_smallkeys == 'vanilla':
        if world.dungeon_mq['Spirit Temple']:
            save_context.addresses['keys']['spirit'].value = 3

    if world.start_with_rupees:
        rom.write_byte(rom.sym('MAX_RUPEES'), 0x01)

    # Set starting time of day
    if world.starting_tod != 'default':
        tod = {
             'sunrise':       0x4555,
             'morning':       0x6000,
             'noon':          0x8001,
             'afternoon':     0xA000,
             'sunset':        0xC001,
             'evening':       0xE000,
             'midnight':      0x0000,
             'witching-hour': 0x2000,

        }
        save_context.addresses['time_of_day'].value = tod[world.starting_tod]

    if world.starting_age == 'adult':
        save_context.addresses['link_age'].value = False                    # Set link's age to adult
        save_context.addresses['scene_index'].value = 0x43                  # Set the scene index to Temple of Time
        save_context.addresses['equip_items']['master_sword'].value = True  # Equip Master Sword by default
        save_context.addresses['equip_items']['kokiri_tunic'].value = True  # Equip Kokiri Tunic & Kokiri Boots by default
        save_context.addresses['equip_items']['kokiri_boots'].value = True  # (to avoid issues when going back child for the first time)
        save_context.write_byte(0x0F33, 0x00)                               # Unset Swordless Flag (to avoid issues with sword getting unequipped)

    # Revert change that Skips the Epona Race
    if not world.no_epona_race:
        rom.write_int32(0xA9E838, 0x03E00008)
    else:
        save_context.write_bits(0xF0E, 0x01) # Set talked to Malon flag

    # skip castle guard stealth sequence
    if world.no_guard_stealth:
        # change the exit at child/day crawlspace to the end of zelda's goddess cutscene
        rom.write_bytes(0x21F60DE, [0x05, 0xF0])

    # patch mq scenes
    mq_scenes = []
    if world.dungeon_mq['Deku Tree']:
        mq_scenes.append(0)
    if world.dungeon_mq['Dodongos Cavern']:
        mq_scenes.append(1)
    if world.dungeon_mq['Jabu Jabus Belly']:
        mq_scenes.append(2)
    if world.dungeon_mq['Forest Temple']:
        mq_scenes.append(3)
    if world.dungeon_mq['Fire Temple']:
        mq_scenes.append(4)
    if world.dungeon_mq['Water Temple']:
        mq_scenes.append(5)
    if world.dungeon_mq['Spirit Temple']:
        mq_scenes.append(6)
    if world.dungeon_mq['Shadow Temple']:
        mq_scenes.append(7)
    if world.dungeon_mq['Bottom of the Well']:
        mq_scenes.append(8)
    if world.dungeon_mq['Ice Cavern']:
        mq_scenes.append(9)
    # Scene 10 has no layout changes, so it doesn't need to be patched
    if world.dungeon_mq['Gerudo Training Ground']:
        mq_scenes.append(11)
    if world.dungeon_mq['Ganons Castle']:
        mq_scenes.append(13)

    patch_files(rom, mq_scenes)

    ### Load Shop File
    # Move shop actor file to free space
    shop_item_file = File({
            'Name':'En_GirlA',
            'Start':'00C004E0',
            'End':'00C02E00',
        })
    shop_item_file.relocate(rom)

    # Increase the shop item table size
    shop_item_vram_start = rom.read_int32(0x00B5E490 + (0x20 * 4) + 0x08)
    insert_space(rom, shop_item_file, shop_item_vram_start, 1, 0x3C + (0x20 * 50), 0x20 * 50)

    # Add relocation entries for shop item table
    new_relocations = []
    for i in range(50, 100):
        new_relocations.append(shop_item_file.start + 0x1DEC + (i * 0x20) + 0x04)
        new_relocations.append(shop_item_file.start + 0x1DEC + (i * 0x20) + 0x14)
        new_relocations.append(shop_item_file.start + 0x1DEC + (i * 0x20) + 0x1C)
    add_relocations(rom, shop_item_file, new_relocations)

    # update actor table
    rom.write_int32s(0x00B5E490 + (0x20 * 4),
        [shop_item_file.start,
        shop_item_file.end,
        shop_item_vram_start,
        shop_item_vram_start + (shop_item_file.end - shop_item_file.start)])

    # Update DMA Table
    update_dmadata(rom, shop_item_file)

    # Create 2nd Bazaar Room
    bazaar_room_file = File({
            'Name':'shop1_room_1',
            'Start':'028E4000',
            'End':'0290D7B0',
        })
    bazaar_room_file.copy(rom)

    # Add new Bazaar Room to Bazaar Scene
    rom.write_int32s(0x28E3030, [0x00010000, 0x02000058]) #reduce position list size
    rom.write_int32s(0x28E3008, [0x04020000, 0x02000070]) #expand room list size

    rom.write_int32s(0x28E3070, [0x028E4000, 0x0290D7B0,
                     bazaar_room_file.start, bazaar_room_file.end]) #room list
    rom.write_int16s(0x28E3080, [0x0000, 0x0001]) # entrance list
    rom.write_int16(0x28E4076, 0x0005) # Change shop to Kakariko Bazaar
    #rom.write_int16(0x3489076, 0x0005) # Change shop to Kakariko Bazaar

    # Load Message and Shop Data
    messages = read_messages(rom)
    remove_unused_messages(messages)
    shop_items = read_shop_items(rom, shop_item_file.start + 0x1DEC)

    # Set Big Poe count to get reward from buyer
    poe_points = world.big_poe_count * 100
    rom.write_int16(0xEE69CE, poe_points)
    # update dialogue
    new_message = "\x08Hey, young man. What's happening \x01today? If you have a \x05\x41Poe\x05\x40, I will \x01buy it.\x04\x1AIf you earn \x05\x41%d points\x05\x40, you'll\x01be a happy man! Heh heh.\x04\x08Your card now has \x05\x45\x1E\x01 \x05\x40points.\x01Come back again!\x01Heh heh heh!\x02" % poe_points
    update_message_by_id(messages, 0x70F5, new_message)
    if world.big_poe_count != 10:
        new_message = "\x1AOh, you brought a Poe today!\x04\x1AHmmmm!\x04\x1AVery interesting!\x01This is a \x05\x41Big Poe\x05\x40!\x04\x1AI'll buy it for \x05\x4150 Rupees\x05\x40.\x04On top of that, I'll put \x05\x41100\x01points \x05\x40on your card.\x04\x1AIf you earn \x05\x41%d points\x05\x40, you'll\x01be a happy man! Heh heh." % poe_points
        update_message_by_id(messages, 0x70f7, new_message)
        new_message = "\x1AWait a minute! WOW!\x04\x1AYou have earned \x05\x41%d points\x05\x40!\x04\x1AYoung man, you are a genuine\x01\x05\x41Ghost Hunter\x05\x40!\x04\x1AIs that what you expected me to\x01say? Heh heh heh!\x04\x1ABecause of you, I have extra\x01inventory of \x05\x41Big Poes\x05\x40, so this will\x01be the last time I can buy a \x01ghost.\x04\x1AYou're thinking about what I \x01promised would happen when you\x01earned %d points. Heh heh.\x04\x1ADon't worry, I didn't forget.\x01Just take this." % (poe_points, poe_points)
        update_message_by_id(messages, 0x70f8, new_message)

    # Update Child Anju's dialogue
    new_message = "\x08What should I do!?\x01My \x05\x41Cuccos\x05\x40 have all flown away!\x04You, little boy, please!\x01Please gather at least \x05\x41%d Cuccos\x05\x40\x01for me.\x02" % world.chicken_count
    update_message_by_id(messages, 0x5036, new_message)

    # Update "Princess Ruto got the Spiritual Stone!" text before the midboss in Jabu
    reward_text = {'Kokiri Emerald':   "\x05\x42Kokiri Emerald\x05\x40",
                   'Goron Ruby':       "\x05\x41Goron Ruby\x05\x40",
                   'Zora Sapphire':    "\x05\x43Zora Sapphire\x05\x40",
                   'Forest Medallion': "\x05\x42Forest Medallion\x05\x40",
                   'Fire Medallion':   "\x05\x41Fire Medallion\x05\x40",
                   'Water Medallion':  "\x05\x43Water Medallion\x05\x40",
                   'Spirit Medallion': "\x05\x46Spirit Medallion\x05\x40",
                   'Shadow Medallion': "\x05\x45Shadow Medallion\x05\x40",
                   'Light Medallion':  "\x05\x44Light Medallion\x05\x40"
    }
    new_message = "\x1a\x08Princess Ruto got the \x01%s!\x09\x01\x14\x02But\x14\x00 why Princess Ruto?\x02" % reward_text[world.get_location('Barinade').item.name]
    update_message_by_id(messages, 0x4050, new_message)

    # use faster jabu elevator
    if not world.dungeon_mq['Jabu Jabus Belly'] and world.shuffle_scrubs == 'off':
        symbol = rom.sym('JABU_ELEVATOR_ENABLE')
        rom.write_byte(symbol, 0x01)

    if world.skip_some_minigame_phases:
        save_context.write_bits(0x00D4 + 0x48 * 0x1C + 0x08 + 0x3, 0x10) # Beat First Dampe Race (& Chest Spawned)
        rom.write_byte(rom.sym('CHAIN_HBA_REWARDS'), 1)
        # Update the first horseback archery text to make it clear both rewards are available from the start
        update_message_by_id(messages, 0x6040, "Hey newcomer, you have a fine \x01horse!\x04I don't know where you stole \x01it from, but...\x04OK, how about challenging this \x01\x05\x41horseback archery\x05\x40?\x04Once the horse starts galloping,\x01shoot the targets with your\x01arrows. \x04Let's see how many points you \x01can score. You get 20 arrows.\x04If you can score \x05\x411,000 points\x05\x40, I will \x01give you something good! And even \x01more if you score \x05\x411,500 points\x05\x40!\x0B\x02")

    # Sets hooks for gossip stone changes

    symbol = rom.sym("GOSSIP_HINT_CONDITION");

    if world.hints == 'none':
        rom.write_int32(symbol, 0)
    else:
        writeGossipStoneHints(world, messages)

        if world.hints == 'mask':
            rom.write_int32(symbol, 0)
        elif world.hints == 'always':
            rom.write_int32(symbol, 2)
        else:
            rom.write_int32(symbol, 1)


    # build silly ganon lines
    if world.misc_hints:
        buildGanonText(world, messages)

    # Write item overrides
    override_table = get_override_table(world)
    rom.write_bytes(rom.sym('cfg_item_overrides'), get_override_table_bytes(override_table))
    rom.write_byte(rom.sym('PLAYER_ID'), min(world.player, 255)) # Write player ID
    rom.write_bytes(rom.sym('AP_PLAYER_NAME'), bytearray(world.world.get_player_name(world.player), 'ascii'))

    if world.death_link:
        rom.write_byte(rom.sym('DEATH_LINK'), 0x01)

    # Revert Song Get Override Injection
    if not songs_as_items:
        # general get song
        rom.write_int32(0xAE5DF8, 0x240200FF)
        rom.write_int32(0xAE5E04, 0xAD0F00A4)
        # requiem of spirit
        rom.write_int32s(0xAC9ABC, [0x3C010001, 0x00300821])
        # sun song -- commented for AP to always set the relevant bit in event_chk_inf
        # rom.write_int32(0xE09F68, 0x8C6F00A4)
        # rom.write_int32(0xE09F74, 0x01CFC024)
        # rom.write_int32(0xE09FB0, 0x240F0001)
        # song of time
        rom.write_int32(0xDB532C, 0x24050003)


    # Set damage multiplier
    if world.damage_multiplier == 'half':
        rom.write_byte(rom.sym('CFG_DAMAGE_MULTIPLYER'), 0xFF)
    if world.damage_multiplier == 'normal':
        rom.write_byte(rom.sym('CFG_DAMAGE_MULTIPLYER'), 0)
    if world.damage_multiplier == 'double':
        rom.write_byte(rom.sym('CFG_DAMAGE_MULTIPLYER'), 1)
    if world.damage_multiplier == 'quadruple':
        rom.write_byte(rom.sym('CFG_DAMAGE_MULTIPLYER'), 2)
    if world.damage_multiplier == 'ohko':
        rom.write_byte(rom.sym('CFG_DAMAGE_MULTIPLYER'), 3)

    # Patch songs and boss rewards
    for location in world.world.get_filled_locations(world.player):
        item = location.item
        special = item.special if item.game == 'Ocarina of Time' else {}  # this shouldn't matter hopefully
        locationaddress = location.address1
        secondaryaddress = location.address2

        if location.type == 'Song' and not songs_as_items:
            bit_mask_pointer = 0x8C34 + ((special['item_id'] - 0x65) * 4)
            rom.write_byte(locationaddress, special['song_id'])
            next_song_id = special['song_id'] + 0x0D
            rom.write_byte(secondaryaddress, next_song_id)
            if location.name == 'Song from Impa':
                rom.write_byte(0x0D12ECB, special['item_id'])
                rom.write_byte(0x2E8E931, special['text_id']) #Fix text box
            elif location.name == 'Song from Malon':
                rom.write_byte(rom.sym('MALON_TEXT_ID'), special['text_id'])
            elif location.name == 'Song from Royal Familys Tomb':
                rom.write_int16(0xE09F66, bit_mask_pointer)
                rom.write_byte(0x332A87D, special['text_id']) #Fix text box
            elif location.name == 'Song from Saria':
                rom.write_byte(0x0E2A02B, special['item_id'])
                rom.write_byte(0x20B1DBD, special['text_id']) #Fix text box
            elif location.name == 'Song from Ocarina of Time':
                rom.write_byte(0x252FC95, special['text_id']) #Fix text box
            elif location.name == 'Song from Windmill':
                rom.write_byte(rom.sym('WINDMILL_SONG_ID'), next_song_id)
                rom.write_byte(rom.sym('WINDMILL_TEXT_ID'), special['text_id'])
            elif location.name == 'Sheik in Forest':
                rom.write_byte(0x0C7BAA3, special['item_id'])
                rom.write_byte(0x20B0815, special['text_id']) #Fix text box
            elif location.name == 'Sheik at Temple':
                rom.write_byte(0x0C805EF, special['item_id'])
                rom.write_byte(0x2531335, special['text_id']) #Fix text box
            elif location.name == 'Sheik in Crater':
                rom.write_byte(0x0C7BC57, special['item_id'])
                rom.write_byte(0x224D7FD, special['text_id']) #Fix text box
            elif location.name == 'Sheik in Ice Cavern':
                rom.write_byte(0x0C7BD77, special['item_id'])
                rom.write_byte(0x2BEC895, special['text_id']) #Fix text box
            elif location.name == 'Sheik in Kakariko':
                rom.write_byte(0x0AC9A5B, special['item_id'])
                rom.write_byte(0x2000FED, special['text_id']) #Fix text box
            elif location.name == 'Sheik at Colossus':
                rom.write_byte(0x218C589, special['text_id']) #Fix text box
        elif location.type == 'Boss':
            if location.name == 'Links Pocket':
                save_context.give_item(item.name)
            else:
                rom.write_byte(locationaddress, special['item_id'])
                rom.write_byte(secondaryaddress, special['addr2_data'])
                bit_mask_hi = special['bit_mask'] >> 16
                bit_mask_lo = special['bit_mask'] & 0xFFFF
                if location.name == 'Bongo Bongo':
                    rom.write_int16(0xCA3F32, bit_mask_hi)
                    rom.write_int16(0xCA3F36, bit_mask_lo)
                elif location.name == 'Twinrova':
                    rom.write_int16(0xCA3EA2, bit_mask_hi)
                    rom.write_int16(0xCA3EA6, bit_mask_lo)

    # add a cheaper bombchu pack to the bombchu shop
    # describe
    update_message_by_id(messages, 0x80FE, '\x08\x05\x41Bombchu   (5 pieces)   60 Rupees\x01\x05\x40This looks like a toy mouse, but\x01it\'s actually a self-propelled time\x01bomb!\x09\x0A', 0x03)
    # purchase
    update_message_by_id(messages, 0x80FF, '\x08Bombchu    5 Pieces    60 Rupees\x01\x01\x1B\x05\x42Buy\x01Don\'t buy\x05\x40\x09', 0x03)
    rbl_bombchu = shop_items[0x0018]
    rbl_bombchu.price = 60
    rbl_bombchu.pieces = 5
    rbl_bombchu.get_item_id = 0x006A
    rbl_bombchu.description_message = 0x80FE
    rbl_bombchu.purchase_message = 0x80FF

    # Reduce 10 Pack Bombchus from 100 to 99 Rupees
    shop_items[0x0015].price = 99
    shop_items[0x0019].price = 99
    shop_items[0x001C].price = 99
    update_message_by_id(messages, shop_items[0x001C].description_message, "\x08\x05\x41Bombchu  (10 pieces)  99 Rupees\x01\x05\x40This looks like a toy mouse, but\x01it's actually a self-propelled time\x01bomb!\x09\x0A")
    update_message_by_id(messages, shop_items[0x001C].purchase_message, "\x08Bombchu  10 pieces   99 Rupees\x09\x01\x01\x1B\x05\x42Buy\x01Don't buy\x05\x40")

    shuffle_messages.shop_item_messages = []

    # kokiri shop
    shop_objs = place_shop_items(rom, world, shop_items, messages,
        world.get_region('KF Kokiri Shop').locations, True)
    shop_objs |= {0x00FC, 0x00B2, 0x0101, 0x0102, 0x00FD, 0x00C5} # Shop objects
    rom.write_byte(0x2587029, len(shop_objs))
    rom.write_int32(0x258702C, 0x0300F600)
    rom.write_int16s(0x2596600, list(shop_objs))

    # kakariko bazaar
    shop_objs = place_shop_items(rom, world, shop_items, messages,
        world.get_region('Kak Bazaar').locations)
    shop_objs |= {0x005B, 0x00B2, 0x00C5, 0x0107, 0x00C9, 0x016B} # Shop objects
    rom.write_byte(0x28E4029, len(shop_objs))
    rom.write_int32(0x28E402C, 0x03007A40)
    rom.write_int16s(0x28EBA40, list(shop_objs))

    # castle town bazaar
    shop_objs = place_shop_items(rom, world, shop_items, messages,
        world.get_region('Market Bazaar').locations)
    shop_objs |= {0x005B, 0x00B2, 0x00C5, 0x0107, 0x00C9, 0x016B} # Shop objects
    rom.write_byte(bazaar_room_file.start + 0x29, len(shop_objs))
    rom.write_int32(bazaar_room_file.start + 0x2C, 0x03007A40)
    rom.write_int16s(bazaar_room_file.start + 0x7A40, list(shop_objs))

    # goron shop
    shop_objs = place_shop_items(rom, world, shop_items, messages,
        world.get_region('GC Shop').locations)
    shop_objs |= {0x00C9, 0x00B2, 0x0103, 0x00AF} # Shop objects
    rom.write_byte(0x2D33029, len(shop_objs))
    rom.write_int32(0x2D3302C, 0x03004340)
    rom.write_int16s(0x2D37340, list(shop_objs))

    # zora shop
    shop_objs = place_shop_items(rom, world, shop_items, messages,
        world.get_region('ZD Shop').locations)
    shop_objs |= {0x005B, 0x00B2, 0x0104, 0x00FE} # Shop objects
    rom.write_byte(0x2D5B029, len(shop_objs))
    rom.write_int32(0x2D5B02C, 0x03004B40)
    rom.write_int16s(0x2D5FB40, list(shop_objs))

    # kakariko potion shop
    shop_objs = place_shop_items(rom, world, shop_items, messages,
        world.get_region('Kak Potion Shop Front').locations)
    shop_objs |= {0x0159, 0x00B2, 0x0175, 0x0122} # Shop objects
    rom.write_byte(0x2D83029, len(shop_objs))
    rom.write_int32(0x2D8302C, 0x0300A500)
    rom.write_int16s(0x2D8D500, list(shop_objs))

    # market potion shop
    shop_objs = place_shop_items(rom, world, shop_items, messages,
        world.get_region('Market Potion Shop').locations)
    shop_objs |= {0x0159, 0x00B2, 0x0175, 0x00C5, 0x010C, 0x016B} # Shop objects
    rom.write_byte(0x2DB0029, len(shop_objs))
    rom.write_int32(0x2DB002C, 0x03004E40)
    rom.write_int16s(0x2DB4E40, list(shop_objs))

    # bombchu shop
    shop_objs = place_shop_items(rom, world, shop_items, messages,
        world.get_region('Market Bombchu Shop').locations)
    shop_objs |= {0x0165, 0x00B2} # Shop objects
    rom.write_byte(0x2DD8029, len(shop_objs))
    rom.write_int32(0x2DD802C, 0x03006A40)
    rom.write_int16s(0x2DDEA40, list(shop_objs))

    # Scrub text stuff.
    def update_scrub_text(message, text_replacement, default_price, price, item_name=None):
        scrub_strip_text = ["some ", "1 piece   ", "5 pieces   ", "30 pieces   "]
        for text in scrub_strip_text:
            message = message.replace(text.encode(), b'')
        message = message.replace(text_replacement[0].encode(), text_replacement[1].encode())
        message = message.replace(b'they are', b'it is')
        if default_price != price:
            message = message.replace(('%d Rupees' % default_price).encode(), ('%d Rupees' % price).encode())
        if item_name is not None:
            message = message.replace(b'mysterious item', item_name.encode())
        return message

    single_item_scrubs = {
        0x3E: world.get_location("HF Deku Scrub Grotto"),
        0x77: world.get_location("LW Deku Scrub Near Bridge"),
        0x79: world.get_location("LW Deku Scrub Grotto Front"),
    }

    scrub_message_dict = {}
    if world.shuffle_scrubs == 'off':
        # Revert Deku Scrubs changes
        rom.write_int32s(0xEBB85C, [
            0x24010002, # addiu at, zero, 2
            0x3C038012, # lui v1, 0x8012
            0x14410004, # bne v0, at, 0xd8
            0x2463A5D0, # addiu v1, v1, -0x5a30
            0x94790EF0])# lhu t9, 0xef0(v1)
        rom.write_int32(0xDF7CB0,
            0xA44F0EF0)  # sh t7, 0xef0(v0)

        # Replace scrub text for 3 default shuffled scrubs.
        for (scrub_item, default_price, text_id, text_replacement) in business_scrubs:
            if scrub_item not in single_item_scrubs.keys():
                continue
            scrub_message_dict[text_id] = update_scrub_text(get_message_by_id(messages, text_id).raw_text, text_replacement, default_price, default_price)
    else:
        # Rebuild Business Scrub Item Table
        rom.seek_address(0xDF8684)
        for (scrub_item, default_price, text_id, text_replacement) in business_scrubs:
            price = world.scrub_prices[scrub_item]
            rom.write_int16(None, price)       # Price
            rom.write_int16(None, 1)           # Count
            rom.write_int32(None, scrub_item)  # Item
            rom.write_int32(None, 0x80A74FF8)  # Can_Buy_Func
            rom.write_int32(None, 0x80A75354)  # Buy_Func

            scrub_message_dict[text_id] = update_scrub_text(get_message_by_id(messages, text_id).raw_text, text_replacement, default_price, price)

        # update actor IDs
        set_deku_salesman_data(rom)

    # Update scrub messages.
    shuffle_messages.scrubs_message_ids = []
    for text_id, message in scrub_message_dict.items():
        update_message_by_id(messages, text_id, message)
        if world.shuffle_scrubs == 'random':
            shuffle_messages.scrubs_message_ids.append(text_id)

    if world.shuffle_grotto_entrances:
        # Build the Grotto Load Table based on grotto entrance data
        for entrance in world.get_shuffled_entrances(type='Grotto'):
            if entrance.primary:
                load_table_pointer = rom.sym('GROTTO_LOAD_TABLE') + 4 * entrance.data['grotto_id']
                rom.write_int16(load_table_pointer, entrance.data['entrance'])
                rom.write_byte(load_table_pointer + 2, entrance.data['content'])

        # Update grotto actors based on their new entrance
        set_grotto_shuffle_data(rom, world)

    if world.shuffle_cows:
        rom.write_byte(rom.sym('SHUFFLE_COWS'), 0x01)
        # Move some cows because they are too close from each other in vanilla
        rom.write_bytes(0x33650CA, [0xFE, 0xD3, 0x00, 0x00, 0x00, 0x6E, 0x00, 0x00, 0x4A, 0x34]) # LLR Tower right cow
        rom.write_bytes(0x2C550AE, [0x00, 0x82]) # LLR Stable right cow
        set_cow_id_data(rom, world)

    if world.shuffle_beans:
        rom.write_byte(rom.sym('SHUFFLE_BEANS'), 0x01)
        # Update bean salesman messages to better fit the fact that he sells a randomized item
        update_message_by_id(messages, 0x405E, "\x1AChomp chomp chomp...\x01We have... \x05\x41a mysterious item\x05\x40! \x01Do you want it...huh? Huh?\x04\x05\x41\x0860 Rupees\x05\x40 and it's yours!\x01Keyahahah!\x01\x1B\x05\x42Yes\x01No\x05\x40\x02")
        update_message_by_id(messages, 0x4069, "You don't have enough money.\x01I can't sell it to you.\x01Chomp chomp...\x02")
        update_message_by_id(messages, 0x406C, "We hope you like it!\x01Chomp chomp chomp.\x02")
        # Change first magic bean to cost 60 (is used as the price for the one time item when beans are shuffled)
        rom.write_byte(0xE209FD, 0x3C)

    if world.shuffle_medigoron_carpet_salesman:
        rom.write_byte(rom.sym('SHUFFLE_CARPET_SALESMAN'), 0x01)
        # Update carpet salesman messages to better fit the fact that he sells a randomized item
        update_message_by_id(messages, 0x6077, "\x06\x41Well Come!\x04I am selling stuff, strange and \x01rare, from all over the world to \x01everybody.\x01Today's special is...\x04A mysterious item! \x01Intriguing! \x01I won't tell you what it is until \x01I see the money....\x04How about \x05\x41200 Rupees\x05\x40?\x01\x01\x1B\x05\x42Buy\x01Don't buy\x05\x40\x02")
        update_message_by_id(messages, 0x6078, "Thank you very much!\x04The mark that will lead you to\x01the Spirit Temple is the \x05\x41flag on\x01the left \x05\x40outside the shop.\x01Be seeing you!\x02")

        rom.write_byte(rom.sym('SHUFFLE_MEDIGORON'), 0x01)
        # Update medigoron messages to better fit the fact that he sells a randomized item
        update_message_by_id(messages, 0x304C, "I have something cool right here.\x01How about it...\x07\x30\x4F\x02")
        update_message_by_id(messages, 0x304D, "How do you like it?\x02")
        update_message_by_id(messages, 0x304F, "How about buying this cool item for \x01200 Rupees?\x01\x1B\x05\x42Buy\x01Don't buy\x05\x40\x02")

    if world.shuffle_smallkeys == 'remove' or world.shuffle_bosskeys == 'remove' or world.shuffle_ganon_bosskey == 'remove':
        locked_doors = get_locked_doors(rom, world)
        for _,[door_byte, door_bits] in locked_doors.items():
            save_context.write_bits(door_byte, door_bits)

    # Fix chest animations
    if world.bombchus_in_logic:
        bombchu_ids = [0x6A, 0x03, 0x6B]
        for i in bombchu_ids:
            item = read_rom_item(rom, i)
            item['chest_type'] = 0
            write_rom_item(rom, i, item)
    if world.bridge == 'tokens' or world.lacs_condition == 'tokens':
        item = read_rom_item(rom, 0x5B)
        item['chest_type'] = 0
        write_rom_item(rom, 0x5B, item)

    # Update chest type sizes
    if world.correct_chest_sizes:
        symbol = rom.sym('CHEST_SIZE_MATCH_CONTENTS')
        rom.write_int32(symbol, 0x00000001)
        # Move Ganon's Castle's Zelda's Lullaby Chest back so is reachable if large
        if not world.dungeon_mq['Ganons Castle']:
            rom.write_int16(0x321B176, 0xFC40) # original 0xFC48

        # Move Spirit Temple Compass Chest if it is a small chest so it is reachable with hookshot
        if not world.dungeon_mq['Spirit Temple']:
            chest_name = 'Spirit Temple Compass Chest'
            chest_address = 0x2B6B07C
            location = world.get_location(chest_name)
            if location.item.game == 'Ocarina of Time':
                item = read_rom_item(rom, location.item.index)
                if item['chest_type'] in (1, 3):
                    rom.write_int16(chest_address + 2, 0x0190) # X pos
                    rom.write_int16(chest_address + 6, 0xFABC) # Z pos
            else:
                if not location.item.advancement:
                    rom.write_int16(chest_address + 2, 0x0190) # X pos
                    rom.write_int16(chest_address + 6, 0xFABC) # Z pos

        # Move Silver Gauntlets chest if it is small so it is reachable from Spirit Hover Seam
        if world.logic_rules != 'glitchless':
            chest_name = 'Spirit Temple Silver Gauntlets Chest'
            chest_address_0 = 0x21A02D0  # Address in setup 0
            chest_address_2 = 0x21A06E4  # Address in setup 2
            location = world.get_location(chest_name)
            if location.item.game == 'Ocarina of Time':
                item = read_rom_item(rom, location.item.index)
                if item['chest_type'] in (1, 3):
                    rom.write_int16(chest_address_0 + 6, 0x0172)  # Z pos
                    rom.write_int16(chest_address_2 + 6, 0x0172)  # Z pos
            else:
                if not location.item.advancement:
                    rom.write_int16(chest_address_0 + 6, 0x0172)  # Z pos
                    rom.write_int16(chest_address_2 + 6, 0x0172)  # Z pos

    # give dungeon items the correct messages
    add_item_messages(messages, shop_items, world)
    if world.enhance_map_compass:
        reward_list = {'Kokiri Emerald':   "\x05\x42Kokiri Emerald\x05\x40",
                       'Goron Ruby':       "\x05\x41Goron Ruby\x05\x40",
                       'Zora Sapphire':    "\x05\x43Zora Sapphire\x05\x40",
                       'Forest Medallion': "\x05\x42Forest Medallion\x05\x40",
                       'Fire Medallion':   "\x05\x41Fire Medallion\x05\x40",
                       'Water Medallion':  "\x05\x43Water Medallion\x05\x40",
                       'Spirit Medallion': "\x05\x46Spirit Medallion\x05\x40",
                       'Shadow Medallion': "\x05\x45Shadow Medallion\x05\x40",
                       'Light Medallion':  "\x05\x44Light Medallion\x05\x40"
        }
        dungeon_list = {'Deku Tree':          ("the \x05\x42Deku Tree", 'Queen Gohma', 0x62, 0x88),
                        'Dodongos Cavern':    ("\x05\x41Dodongo\'s Cavern", 'King Dodongo', 0x63, 0x89),
                        'Jabu Jabus Belly':   ("\x05\x43Jabu Jabu\'s Belly", 'Barinade', 0x64, 0x8a),
                        'Forest Temple':      ("the \x05\x42Forest Temple", 'Phantom Ganon', 0x65, 0x8b),
                        'Fire Temple':        ("the \x05\x41Fire Temple", 'Volvagia', 0x7c, 0x8c),
                        'Water Temple':       ("the \x05\x43Water Temple", 'Morpha', 0x7d, 0x8e),
                        'Spirit Temple':      ("the \x05\x46Spirit Temple", 'Twinrova', 0x7e, 0x8f),
                        'Ice Cavern':         ("the \x05\x44Ice Cavern", None, 0x87, 0x92),
                        'Bottom of the Well': ("the \x05\x45Bottom of the Well", None, 0xa2, 0xa5),
                        'Shadow Temple':      ("the \x05\x45Shadow Temple", 'Bongo Bongo', 0x7f, 0xa3),
        }
        for dungeon in world.dungeon_mq:
            if dungeon in ['Gerudo Training Ground', 'Ganons Castle']:
                pass
            elif dungeon in ['Bottom of the Well', 'Ice Cavern']:
                dungeon_name, boss_name, compass_id, map_id = dungeon_list[dungeon]
                if len(world.world.worlds) > 1:
                    map_message = "\x13\x76\x08\x05\x42\x0F\x05\x40 found the \x05\x41Dungeon Map\x05\x40\x01for %s\x05\x40!\x09" % (dungeon_name)
                else:
                    map_message = "\x13\x76\x08You found the \x05\x41Dungeon Map\x05\x40\x01for %s\x05\x40!\x01It\'s %s!\x09" % (dungeon_name, "masterful" if world.dungeon_mq[dungeon] else "ordinary")

                if world.mq_dungeons_random or world.mq_dungeons != 0 and world.mq_dungeons != 12:
                    update_message_by_id(messages, map_id, map_message)
            else:
                dungeon_name, boss_name, compass_id, map_id = dungeon_list[dungeon]
                dungeon_reward = reward_list[world.get_location(boss_name).item.name]
                if len(world.world.worlds) > 1:
                    compass_message = "\x13\x75\x08\x05\x42\x0F\x05\x40 found the \x05\x41Compass\x05\x40\x01for %s\x05\x40!\x09" % (dungeon_name)
                else:
                    compass_message = "\x13\x75\x08You found the \x05\x41Compass\x05\x40\x01for %s\x05\x40!\x01It holds the %s!\x09" % (dungeon_name, dungeon_reward)
                update_message_by_id(messages, compass_id, compass_message)
                if world.mq_dungeons_random or world.mq_dungeons != 0 and world.mq_dungeons != 12:
                    if len(world.world.worlds) > 1:
                        map_message = "\x13\x76\x08\x05\x42\x0F\x05\x40 found the \x05\x41Dungeon Map\x05\x40\x01for %s\x05\x40!\x09" % (dungeon_name)
                    else:
                        map_message = "\x13\x76\x08You found the \x05\x41Dungeon Map\x05\x40\x01for %s\x05\x40!\x01It\'s %s!\x09" % (dungeon_name, "masterful" if world.dungeon_mq[dungeon] else "ordinary")
                    update_message_by_id(messages, map_id, map_message)

    # Set hints on the altar inside ToT
    rom.write_int16(0xE2ADB2, 0x707A)
    rom.write_int16(0xE2ADB6, 0x7057)
    buildAltarHints(world, messages, include_rewards=world.misc_hints and not world.enhance_map_compass, include_wincons=world.misc_hints)

    # Set Dungeon Reward actors in Jabu Jabu to be accurate
    jabu_actor_type = world.get_location('Barinade').item.special['actor_type']
    set_jabu_stone_actors(rom, jabu_actor_type)
    # Also set the right object for the actor, since medallions and stones require different objects
    # MQ is handled separately, as we include both objects in the object list in mqu.json (Scene 2, Room 6)
    if not world.dungeon_mq['Jabu Jabus Belly']:
        jabu_stone_object = world.get_location('Barinade').item.special['object_id']
        rom.write_int16(0x277D068, jabu_stone_object)
        rom.write_int16(0x277D168, jabu_stone_object)

    # update happy mask shop to use new SOLD OUT text id
    rom.write_int16(shop_item_file.start + 0x1726, shop_items[0x26].description_message)

    # Add 3rd Wallet Upgrade
    rom.write_int16(0xB6D57E, 0x0003)
    rom.write_int16(0xB6EC52, 999)
    tycoon_message = "\x08\x13\x57You got a \x05\x43Tycoon's Wallet\x05\x40!\x01Now you can hold\x01up to \x05\x46999\x05\x40 \x05\x46Rupees\x05\x40."
    if len(world.world.worlds) > 1:
       tycoon_message = make_player_message(tycoon_message)
    update_message_by_id(messages, 0x00F8, tycoon_message, 0x23)

    write_shop_items(rom, shop_item_file.start + 0x1DEC, shop_items)

    permutation = None

    # text shuffle
    if world.text_shuffle == 'except_hints':
        permutation = shuffle_messages(messages, except_hints=True)
    elif world.text_shuffle == 'complete':
        permutation = shuffle_messages(messages, except_hints=False)

    # If Warp Song ER is on, update text boxes
    if world.warp_songs:
        update_warp_song_text(messages, world)

    repack_messages(rom, messages, permutation)

    # output a text dump, for testing...
    #with open('keysanity_' + str(world.seed) + '_dump.txt', 'w', encoding='utf-16') as f:
    #     messages = read_messages(rom)
    #     f.write('item_message_strings = {\n')
    #     for m in messages:
    #        f.write("\t0x%04X: \"%s\",\n" % (m.id, m.get_python_string()))
    #     f.write('}\n')

    if world.free_scarecrow:
        # Played song as adult
        save_context.write_bits(0x0EE6, 0x10)
        # Direct scarecrow behavior
        symbol = rom.sym('FREE_SCARECROW_ENABLED')
        rom.write_byte(symbol, 0x01)

    # Enable MM-like Bunny Hood behavior (1.5× speed)
    if world.fast_bunny_hood:
        symbol = rom.sym('FAST_BUNNY_HOOD_ENABLED')
        rom.write_byte(symbol, 0x01)

    # actually write the save table to rom
    for (name, count) in world.starting_items.items():
        if count == 0:
            continue
        save_context.give_item(name, count)

    if world.starting_age == 'adult':
        # When starting as adult, the pedestal doesn't handle child default equips when going back child the first time, so we have to equip them ourselves
        save_context.equip_default_items('child')
    save_context.equip_current_items(world.starting_age)
    save_context.write_save_table(rom)

    # Write data into AP autotracking context
    rom.write_int32(rom.sym('DUNGEON_IS_MQ_ADDRESS'), rom.sym('cfg_dungeon_is_mq'))
    rom.write_int32(rom.sym('DUNGEON_REWARDS_ADDRESS'), rom.sym('cfg_dungeon_rewards'))
    rom.write_byte(rom.sym('BIG_POE_COUNT'), world.big_poe_count)
    if world.enhance_map_compass:
        rom.write_byte(rom.sym('ENHANCE_MAP_COMPASS'), 0x01)
    if world.enhance_map_compass or world.misc_hints:
        rom.write_byte(rom.sym('SHOW_DUNGEON_REWARDS'), 0x01)
    if world.shuffle_smallkeys == 'remove':
        rom.write_byte(rom.sym('SMALL_KEY_SHUFFLE'), 0x01)
    elif world.shuffle_smallkeys in ['overworld', 'any_dungeon', 'keysanity']:
        rom.write_byte(rom.sym('SMALL_KEY_SHUFFLE'), 0x02)
    if world.shuffle_scrubs != 'off':
        rom.write_byte(rom.sym('SHUFFLE_SCRUBS'), 0x01)
    if world.open_forest == 'closed_deku':
        rom.write_byte(rom.sym('OPEN_FOREST'), 0x01)
    elif world.open_forest == 'closed':
        rom.write_byte(rom.sym('OPEN_FOREST'), 0x02)
    if world.zora_fountain == 'adult':
        rom.write_byte(rom.sym('OPEN_FOUNTAIN'), 0x01)
    elif world.zora_fountain == 'closed':
        rom.write_byte(rom.sym('OPEN_FOUNTAIN'), 0x02)

    rom.write_bytes(rom.sym('SHOP_SLOTS'), [
        sum(f'{shop} Item {idx}' in world.shop_prices for idx in ('7', '5', '8', '6'))
        for shop in ('KF Shop', 'Market Bazaar', 'Market Potion Shop', 'Market Bombchu Shop', 
            'Kak Bazaar', 'Kak Potion Shop', 'GC Shop', 'ZD Shop')
    ])

    return rom


NUM_VANILLA_OBJECTS = 0x192
def add_to_extended_object_table(rom, object_id, object_file):
    extended_id = object_id - NUM_VANILLA_OBJECTS - 1
    extended_object_table = rom.sym('EXTENDED_OBJECT_TABLE')
    rom.write_int32s(extended_object_table + extended_id * 8, [object_file.start, object_file.end])


item_row_struct = struct.Struct('>BBHHBBIIhh') # Match item_row_t in item_table.h
item_row_fields = [
    'base_item_id', 'action_id', 'text_id', 'object_id', 'graphic_id', 'chest_type',
    'upgrade_fn', 'effect_fn', 'effect_arg1', 'effect_arg2',
]


def read_rom_item(rom, item_id):
    addr = rom.sym('item_table') + (item_id * item_row_struct.size)
    row_bytes = rom.read_bytes(addr, item_row_struct.size)
    row = item_row_struct.unpack(row_bytes)
    return { item_row_fields[i]: row[i] for i in range(len(item_row_fields)) }


def write_rom_item(rom, item_id, item):
    addr = rom.sym('item_table') + (item_id * item_row_struct.size)
    row = [item[f] for f in item_row_fields]
    row_bytes = item_row_struct.pack(*row)
    rom.write_bytes(addr, row_bytes)



def get_override_table(world):
    return list(filter(lambda val: val != None, map(partial(get_override_entry, world.player), world.world.get_filled_locations(world.player))))


override_struct = struct.Struct('>xBBBHBB') # match override_t in get_items.c
def get_override_table_bytes(override_table):
    return b''.join(sorted(itertools.starmap(override_struct.pack, override_table)))


def get_override_entry(player_id, location):
    scene = location.scene
    default = location.default
    player_id = 0 if player_id == location.item.player else min(location.item.player, 255)
    if location.item.game != 'Ocarina of Time': 
        # This is an AP sendable. It's guaranteed to not be None. 
        if location.item.advancement:
            item_id = 0xCB
        else:
            item_id = 0xCC
    else: 
        item_id = location.item.index
        if None in [scene, default, item_id]:
            return None

    if location.item.trap:
        item_id = 0x7C  # Ice Trap ID, to get "X is a fool" message
        looks_like_item_id = location.item.looks_like_item.index
    else:
        looks_like_item_id = 0

    if location.type in ['NPC', 'BossHeart']:
        type = 0
    elif location.type == 'Chest':
        type = 1
        default &= 0x1F
    elif location.type == 'Collectable':
        type = 2
    elif location.type == 'GS Token':
        type = 3
    elif location.type == 'Shop' and not (isinstance(location.item, OOTItem) and location.item.type == 'Shop'):
        type = 0
    elif location.type == 'GrottoNPC' and not (isinstance(location.item, OOTItem) and location.item.type == 'Shop'):
        type = 4
    elif location.type in ['Song', 'Cutscene']:
        type = 5
    else:
        return None

    return (scene, type, default, item_id, player_id, looks_like_item_id)


chestTypeMap = {
        #    small   big     boss
    0x0000: [0x5000, 0x0000, 0x2000], #Large
    0x1000: [0x7000, 0x1000, 0x1000], #Large, Appears, Clear Flag
    0x2000: [0x5000, 0x0000, 0x2000], #Boss Key’s Chest
    0x3000: [0x8000, 0x3000, 0x3000], #Large, Falling, Switch Flag
    0x4000: [0x6000, 0x4000, 0x4000], #Large, Invisible
    0x5000: [0x5000, 0x0000, 0x2000], #Small
    0x6000: [0x6000, 0x4000, 0x4000], #Small, Invisible
    0x7000: [0x7000, 0x1000, 0x1000], #Small, Appears, Clear Flag
    0x8000: [0x8000, 0x3000, 0x3000], #Small, Falling, Switch Flag
    0x9000: [0x9000, 0x9000, 0x9000], #Large, Appears, Zelda's Lullaby
    0xA000: [0xA000, 0xA000, 0xA000], #Large, Appears, Sun's Song Triggered
    0xB000: [0xB000, 0xB000, 0xB000], #Large, Appears, Switch Flag
    0xC000: [0x5000, 0x0000, 0x2000], #Large
    0xD000: [0x5000, 0x0000, 0x2000], #Large
    0xE000: [0x5000, 0x0000, 0x2000], #Large
    0xF000: [0x5000, 0x0000, 0x2000], #Large
}


def room_get_actors(rom, actor_func, room_data, scene, alternate=None):
    actors = {}
    room_start = alternate if alternate else room_data
    command = 0
    while command != 0x14: # 0x14 = end header
        command = rom.read_byte(room_data)
        if command == 0x01: # actor list
            actor_count = rom.read_byte(room_data + 1)
            actor_list = room_start + (rom.read_int32(room_data + 4) & 0x00FFFFFF)
            for _ in range(0, actor_count):
                actor_id = rom.read_int16(actor_list)
                entry = actor_func(rom, actor_id, actor_list, scene)
                if entry:
                    actors[actor_list] = entry
                actor_list = actor_list + 16
        if command == 0x18: # Alternate header list
            header_list = room_start + (rom.read_int32(room_data + 4) & 0x00FFFFFF)
            for alt_id in range(0,3):
                header_data = room_start + (rom.read_int32(header_list) & 0x00FFFFFF)
                if header_data != 0 and not alternate:
                    actors.update(room_get_actors(rom, actor_func, header_data, scene, room_start))
                header_list = header_list + 4
        room_data = room_data + 8
    return actors


def scene_get_actors(rom, actor_func, scene_data, scene, alternate=None, processed_rooms=None):
    if processed_rooms == None:
        processed_rooms = []
    actors = {}
    scene_start = alternate if alternate else scene_data
    command = 0
    while command != 0x14: # 0x14 = end header
        command = rom.read_byte(scene_data)
        if command == 0x04: #room list
            room_count = rom.read_byte(scene_data + 1)
            room_list = scene_start + (rom.read_int32(scene_data + 4) & 0x00FFFFFF)
            for _ in range(0, room_count):
                room_data = rom.read_int32(room_list);

                if not room_data in processed_rooms:
                    actors.update(room_get_actors(rom, actor_func, room_data, scene))
                    processed_rooms.append(room_data)
                room_list = room_list + 8
        if command == 0x0E: #transition actor list
            actor_count = rom.read_byte(scene_data + 1)
            actor_list = scene_start + (rom.read_int32(scene_data + 4) & 0x00FFFFFF)
            for _ in range(0, actor_count):
                actor_id = rom.read_int16(actor_list + 4)
                entry = actor_func(rom, actor_id, actor_list, scene)
                if entry:
                    actors[actor_list] = entry
                actor_list = actor_list + 16
        if command == 0x18: # Alternate header list
            header_list = scene_start + (rom.read_int32(scene_data + 4) & 0x00FFFFFF)
            for alt_id in range(0,3):
                header_data = scene_start + (rom.read_int32(header_list) & 0x00FFFFFF)
                if header_data != 0 and not alternate:
                    actors.update(scene_get_actors(rom, actor_func, header_data, scene, scene_start, processed_rooms))
                header_list = header_list + 4

        scene_data = scene_data + 8
    return actors


def get_actor_list(rom, actor_func):
    actors = {}
    scene_table = 0x00B71440
    for scene in range(0x00, 0x65):
        scene_data = rom.read_int32(scene_table + (scene * 0x14));
        actors.update(scene_get_actors(rom, actor_func, scene_data, scene))
    return actors


def get_override_itemid(override_table, scene, type, flags):
    for entry in override_table:
        if entry[0] == scene and (entry[1] & 0x07) == type and entry[2] == flags:
            return entry[4]
    return None

def remove_entrance_blockers(rom):
    def remove_entrance_blockers_do(rom, actor_id, actor, scene):
        if actor_id == 0x014E and scene == 97:
            actor_var = rom.read_int16(actor + 14);
            if actor_var == 0xFF01:
                rom.write_int16(actor + 14, 0x0700)
    get_actor_list(rom, remove_entrance_blockers_do)

def set_cow_id_data(rom, world):
    def set_cow_id(rom, actor_id, actor, scene):
        nonlocal last_scene
        nonlocal cow_count
        nonlocal last_actor

        if actor_id == 0x01C6: #Cow
            if scene == last_scene and last_actor != actor:
                cow_count += 1
            else:
                cow_count = 1

            last_scene = scene
            last_actor = actor
            if world.dungeon_mq['Jabu Jabus Belly'] and scene == 2: #If its an MQ jabu cow
                rom.write_int16(actor + 0x8, 1 if cow_count == 17 else 0) #Give all wall cows ID 0, and set cow 11's ID to 1
            else:
                rom.write_int16(actor + 0x8, cow_count)

    last_actor = -1
    last_scene = -1
    cow_count = 1

    get_actor_list(rom, set_cow_id)


def set_grotto_shuffle_data(rom, world):
    def override_grotto_data(rom, actor_id, actor, scene):
        if actor_id == 0x009B: #Grotto
            actor_zrot = rom.read_int16(actor + 12)
            actor_var = rom.read_int16(actor + 14)
            grotto_type = (actor_var >> 8) & 0x0F
            grotto_actor_id = (scene << 8) + (actor_var & 0x00FF)

            rom.write_int16(actor + 12, grotto_entrances_override[grotto_actor_id])
            rom.write_byte(actor + 14, grotto_type + 0x20)

    # Build the override table based on shuffled grotto entrances
    grotto_entrances_override = {}
    for entrance in world.get_shuffled_entrances(type='Grotto'):
        if entrance.primary:
            grotto_actor_id = (entrance.data['scene'] << 8) + entrance.data['content']
            grotto_entrances_override[grotto_actor_id] = entrance.replaces.data['index']
        else:
            rom.write_int16(rom.sym('GROTTO_EXIT_LIST') + 2 * entrance.data['grotto_id'], entrance.replaces.data['index'])

    # Override grotto actors data with the new data
    get_actor_list(rom, override_grotto_data)


def set_deku_salesman_data(rom):
    def set_deku_salesman(rom, actor_id, actor, scene):
        if actor_id == 0x0195: #Salesman
            actor_var = rom.read_int16(actor + 14)
            if actor_var == 6:
                rom.write_int16(actor + 14, 0x0003)

    get_actor_list(rom, set_deku_salesman)


def set_jabu_stone_actors(rom, jabu_actor_type):
    def set_jabu_stone_actor(rom, actor_id, actor, scene):
        if scene == 2 and actor_id == 0x008B: # Demo_Effect in Jabu Jabu
            actor_type = rom.read_byte(actor + 15)
            if actor_type == 0x15:
                rom.write_byte(actor + 15, jabu_actor_type)

    get_actor_list(rom, set_jabu_stone_actor)


def get_locked_doors(rom, world):
    def locked_door(rom, actor_id, actor, scene):
        actor_var = rom.read_int16(actor + 14)
        actor_type = actor_var >> 6
        actor_flag = actor_var & 0x003F

        flag_id = (1 << actor_flag)
        flag_byte = 3 - (actor_flag >> 3)
        flag_bits = 1 << (actor_flag & 0x07)

        # If locked door, set the door's unlock flag
        if world.shuffle_smallkeys == 'remove':
            if actor_id == 0x0009 and actor_type == 0x02:
                return [0x00D4 + scene * 0x1C + 0x04 + flag_byte, flag_bits]
            if actor_id == 0x002E and actor_type == 0x0B:
                return [0x00D4 + scene * 0x1C + 0x04 + flag_byte, flag_bits]

        # If boss door, set the door's unlock flag
        if (world.shuffle_bosskeys == 'remove' and scene != 0x0A) or (world.shuffle_ganon_bosskey == 'remove' and scene == 0x0A):
            if actor_id == 0x002E and actor_type == 0x05:
                return [0x00D4 + scene * 0x1C + 0x04 + flag_byte, flag_bits]

    return get_actor_list(rom, locked_door)


def place_shop_items(rom, world, shop_items, messages, locations, init_shop_id=False):
    if init_shop_id:
        world.current_shop_id = 0x32

    shop_objs = { 0x0148 } # "Sold Out" object
    for location in locations:
        if location.item.type == 'Shop':
            shop_objs.add(location.item.special['object'])
            rom.write_int16(location.address1, location.item.index)
        else:
            if location.item.trap:
                item_display = location.item.looks_like_item
            elif location.item.game != "Ocarina of Time": 
                item_display = location.item
                if location.item.advancement:
                    item_display.index = 0xCB
                else:
                    item_display.index = 0xCC
                item_display.special = {}
            else:
                item_display = location.item

            # bottles in shops should look like empty bottles
            # so that that are different than normal shop refils
            if 'shop_object' in item_display.special:
                rom_item = read_rom_item(rom, item_display.special['shop_object'])
            else:
                rom_item = read_rom_item(rom, item_display.index)

            shop_objs.add(rom_item['object_id'])
            shop_id = world.current_shop_id
            rom.write_int16(location.address1, shop_id)
            shop_item = shop_items[shop_id]

            shop_item.object = rom_item['object_id']
            shop_item.model = rom_item['graphic_id'] - 1
            shop_item.price = location.price
            shop_item.pieces = 1
            shop_item.get_item_id = location.default
            shop_item.func1 = 0x808648CC
            shop_item.func2 = 0x808636B8
            shop_item.func3 = 0x00000000
            shop_item.func4 = 0x80863FB4

            message_id = (shop_id - 0x32) * 2
            shop_item.description_message = 0x8100 + message_id
            shop_item.purchase_message = 0x8100 + message_id + 1

            shuffle_messages.shop_item_messages.extend(
                [shop_item.description_message, shop_item.purchase_message])

            if getattr(item_display, 'dungeonitem', False) and location.item.game == "Ocarina of Time":
                split_item_name = item_display.name.split('(')
                split_item_name[1] = '(' + split_item_name[1]

                if location.item.name == 'Ice Trap':
                    split_item_name[0] = create_fake_name(split_item_name[0])

                if len(world.world.worlds) > 1: # OOTWorld.MultiWorld.AutoWorld[]
                    description_text = '\x08\x05\x41%s  %d Rupees\x01%s\x01\x05\x42%s\x05\x40\x01Special deal! ONE LEFT!\x09\x0A\x02' % (split_item_name[0], location.price, split_item_name[1], world.world.get_player_name(location.item.player))
                else:
                    description_text = '\x08\x05\x41%s  %d Rupees\x01%s\x01\x05\x40Special deal! ONE LEFT!\x01Get it while it lasts!\x09\x0A\x02' % (split_item_name[0], location.price, split_item_name[1])
                purchase_text = '\x08%s  %d Rupees\x09\x01%s\x01\x1B\x05\x42Buy\x01Don\'t buy\x05\x40\x02' % (split_item_name[0], location.price, split_item_name[1])
            else:
                if item_display.game == "Ocarina of Time":
                    shop_item_name = getSimpleHintNoPrefix(item_display)
                else:
                    shop_item_name = item_display.name

                if location.item.trap:
                    shop_item_name = create_fake_name(shop_item_name)

                if len(world.world.worlds) > 1:
                    shop_item_name = ''.join(filter(lambda char: char in character_table, shop_item_name))
                    do_line_break = sum(character_table[char] for char in f"{shop_item_name}  {location.price} Rupees") > NORMAL_LINE_WIDTH
                    description_text = '\x08\x05\x41%s%s%d Rupees\x01\x05\x42%s\x05\x40\x01Special deal! ONE LEFT!\x09\x0A\x02' % (shop_item_name, '\x01' if do_line_break else '  ', location.price, world.world.get_player_name(location.item.player))
                else:
                    description_text = '\x08\x05\x41%s  %d Rupees\x01\x05\x40Special deal! ONE LEFT!\x01Get it while it lasts!\x09\x0A\x02' % (shop_item_name, location.price)
                purchase_text = '\x08%s  %d Rupees\x09\x01\x01\x1B\x05\x42Buy\x01Don\'t buy\x05\x40\x02' % (shop_item_name, location.price)

            update_message_by_id(messages, shop_item.description_message, description_text, 0x03)
            update_message_by_id(messages, shop_item.purchase_message, purchase_text, 0x03)

        if any(filter(lambda c: c in location.name, {'5', '6', '7', '8'})):
            world.current_shop_id += 1

    return shop_objs


def create_fake_name(item_name):
    return item_name + "???"


def boss_reward_index(world, boss_name):
    code = world.get_location(boss_name).item.special['item_id']
    if code >= 0x6C:
        return code - 0x6C
    else:
        return 3 + code - 0x66


def configure_dungeon_info(rom, world):
    mq_enable = (world.mq_dungeons_random or world.mq_dungeons != 0 and world.mq_dungeons != 12)
    enhance_map_compass = world.enhance_map_compass

    bosses = ['Queen Gohma', 'King Dodongo', 'Barinade', 'Phantom Ganon',
            'Volvagia', 'Morpha', 'Twinrova', 'Bongo Bongo']
    dungeon_rewards = [boss_reward_index(world, boss) for boss in bosses]

    codes = ['Deku Tree', 'Dodongos Cavern', 'Jabu Jabus Belly', 'Forest Temple',
             'Fire Temple', 'Water Temple', 'Spirit Temple', 'Shadow Temple',
             'Bottom of the Well', 'Ice Cavern', 'Tower (N/A)',
             'Gerudo Training Ground', 'Hideout (N/A)', 'Ganons Castle']
    dungeon_is_mq = [1 if world.dungeon_mq.get(c) else 0 for c in codes]

    rom.write_int32(rom.sym('cfg_dungeon_info_enable'), 1)
    rom.write_int32(rom.sym('cfg_dungeon_info_mq_enable'), int(mq_enable))
    rom.write_int32(rom.sym('cfg_dungeon_info_mq_need_map'), int(enhance_map_compass))
    rom.write_int32(rom.sym('cfg_dungeon_info_reward_enable'), int(world.misc_hints or enhance_map_compass))
    rom.write_int32(rom.sym('cfg_dungeon_info_reward_need_compass'), int(enhance_map_compass))
    rom.write_int32(rom.sym('cfg_dungeon_info_reward_need_altar'), int(not enhance_map_compass))
    rom.write_bytes(rom.sym('cfg_dungeon_rewards'), dungeon_rewards)
    rom.write_bytes(rom.sym('cfg_dungeon_is_mq'), dungeon_is_mq)