Change Oot:DBG intro

change_intro.py

#!/usr/bin/python3

import sys
import os
from struct import *
import mmap


def changeIntroLogo():
    emptySpaceAddress = 0x01AA1000 # 0x035CF000
    fileSize = os.path.getsize(sys.argv[2])

    startAddress = pack(">I", emptySpaceAddress)
    endAddress = pack(">I", emptySpaceAddress + fileSize)

    zeroedAddress = pack("I", 0x00000000)

    displayListEntry = pack(">I", (int(sys.argv[3], 16)+0x01000000))

    print(hex((int(sys.argv[3], 16)+0x01000000)))
    print("Start: {0} End: {1}".format(hex(emptySpaceAddress), hex(emptySpaceAddress+fileSize)))

    with open(sys.argv[1], "r+b") as ROMHandle:
        ROMMap = mmap.mmap(ROMHandle.fileno(), 0)

        with open(sys.argv[2], "r+b") as zobjFile:
            zobjMap = mmap.mmap(zobjFile.fileno(), 0)
            ROMMap[emptySpaceAddress:emptySpaceAddress+fileSize] = zobjMap.read(fileSize)
            zobjMap.close()

        print("Modifying logo file entry...")

        nintendoRogoFileEntry = 0x16A10
        address = nintendoRogoFileEntry
        ROMMap[address+0x00:address+0x04] = startAddress
        ROMMap[address+0x04:address+0x08] = endAddress
        ROMMap[address+0x08:address+0x0C] = startAddress
        ROMMap[address+0x0C:address+0x10] = zeroedAddress

        print("Modifying logo file entry ovl_title constants...")

        ovlTitleNintendoRogoConstantAddresses = 0xBCF7AC
        address = ovlTitleNintendoRogoConstantAddresses
        ROMMap[address+0x0+2:address+0x0+4] = startAddress[0:2]
        ROMMap[address+0xC+2:address+0xC+4] = startAddress[2:]
        ROMMap[address+0x4+2:address+0x4+4] = endAddress[0:2]
        ROMMap[address+0x8+2:address+0x8+4] = endAddress[2:]

        print("Modifying ovl_title logo display list entry constant...")

        ovlTitleNintendoRogoDLAddress = 0xBCF294
        address = ovlTitleNintendoRogoDLAddress
        ROMMap[address+0x0+2:address+0x0+4] = bytearray([0x01, 0x00])
        ROMMap[address+0xC+2:address+0xC+4] = displayListEntry[2:]

        nintendoRogoTextureAddress = 0xBCF394
        address = nintendoRogoTextureAddress
        ROMMap[address+0x0+2:address+0x0+4] = zeroedAddress[0:2]

        address = 0xBCF464 # size? 0x5E (94)
        ROMMap[address+0x0+2:address+0x0+4] = bytearray([0x00, 0x5E])
        address = 0xBCF474 # size? 0x180 (384)
        ROMMap[address+0x0+2:address+0x0+4] = zeroedAddress[0:2]

        print("Intro model replacement completed.")

if len(sys.argv) != 4:
    print("Usage: change-intro.py <Master Quest DB ROM> <zobj> <display list entry>")
    print(sys.argv)
else:
    changeIntroLogo()