N64 GameShark ROM Reverse Engineering

Discussion in 'Other Consoles & Oldies' started by gudenau, Apr 16, 2017.

Share This Page

Share This Page

  1. gudenau
    OP

    gudenau Largely ignored

    Member
    GBAtemp Patron
    gudenau is a Patron of GBAtemp and is helping us stay independent!

    Our Patreon
    3,371
    1,286
    Jul 7, 2010
    United States
    /dev/random
    I am interesting in reverse engineering the ROM of the Nintendo 64 Gameshark, I have managed to find a tool that allows decryption of the ROM images.

    Now I am trying to figure out how I could load the ROM image into some sort of disassembler. When looking at the ROM in a hex editor I found what seems almost like a 0x39C0. The strings appear later in the ROM.

    The main thing I want to accomplish is the ability to access the parallel port in custom code, from what I have seen this has been done just not publicly documented.

    Hashes:
    Code:
      File: ar3.enc
CRC-32: 242eb6dd
   MD4: e31885d797d73579b61a80ecbc4b7aea
   MD5: e611755c131790cb79d961ca477de6d4
 SHA-1: c935652989a3445fe770133da03da8f9a8e69b57

  File: ar3.dec
CRC-32: c616a684
   MD4: 70bb729e61220c5d26f0afe8dae19ccc
   MD5: ea635ebc4f58481be60d6d532c232870
 SHA-1: d7b7ddf211c93bf4d5fca959f7e850fd5cda373d
     
    AriaHiro likes this.
    #1 Apr 16, 2017
  2. AriaHiro

    AriaHiro Advanced Member

    Newcomer
    59
    28
    May 12, 2016
    United States
    I'm not sure due to when I was a bit more active I dealt with the end result but The guy working on Mupen64plus AE has been fiddling with the game shark pro trying to get roms to dump on modern hardware. For his purpose, there are already superior tools but homebrew on the real thing sounds like a really interesting and cost effective use of hardware most people already have. I'm not sure if it will help in any way but here's his blog. http://www.paulscode.com/forum/index.php?topic=1773.0
    Edit Sorta unrelated and this doesn't have the checksum data but people have already cracked the lockout chip. https://github.com/mikeryan/UltraCIC
     
    Last edited by AriaHiro, Apr 19, 2017
    #2 Apr 19, 2017
  3. gudenau
    OP

    gudenau Largely ignored

    Member
    GBAtemp Patron
    gudenau is a Patron of GBAtemp and is helping us stay independent!

    Our Patreon
    3,371
    1,286
    Jul 7, 2010
    United States
    /dev/random
    Ahh, this could help getting started on the PC side of things. Thanks for pointing me to Paul's stuff, forgot he did N64 stuff.
     
    #3 Apr 19, 2017
  4. gudenau
    OP

    gudenau Largely ignored

    Member
    GBAtemp Patron
    gudenau is a Patron of GBAtemp and is helping us stay independent!

    Our Patreon
    3,371
    1,286
    Jul 7, 2010
    United States
    /dev/random
    Gosh darn, I wanted to investigate this more and I can not find the tool I used to decrypt the ROM.
     
    #4 Aug 18, 2017
Loading...
Similar Threads - N64 GameShark ROM Hide similar threads
  1. Nintendo Fanboy

    Need Help With GameShark Pro 3.20 (N64)

    Nintendo Fanboy, Mar 21, 2018, in forum: Other Consoles & Oldies
    Replies:
    2
    Views:
    183
    Nintendo Fanboy
    Mar 21, 2018
  2. duffmmann

    Anyone able to make gameshark codes for N64 games? I have a request that would make DK64 way better

    duffmmann, Feb 26, 2017, in forum: Other Consoles & Oldies
    Replies:
    0
    Views:
    314
    duffmmann
    Feb 26, 2017
  3. Alan Treecko

    Gameshark Pro N64 not loading at all

    Alan Treecko, Sep 20, 2016, in forum: Other Consoles & Oldies
    Replies:
    1
    Views:
    380
    atkfromabove
    Sep 20, 2016
  4. gudenau

    n64 Gameshark Fix?

    gudenau, Jun 5, 2016, in forum: Other Consoles & Oldies
    Replies:
    0
    Views:
    335
    gudenau
    Jun 5, 2016
  5. Doodle299

    N64 Gameshark v2.0 Question.

    Doodle299, May 20, 2016, in forum: Other Consoles & Oldies
    Replies:
    0
    Views:
    635
    Doodle299
    May 20, 2016