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Sonic R Hacking

Discussion in 'Engineering & Reverse Engineering' started by MainMemory, Dec 1, 2009.

  1. MainMemory

    MainMemory

    Kate the Wolf Tech Member
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    So, I decided to mess around with Sonic R after Polygon Jim told me that the controls work if you run it from IDA.

    Make it stop crashing on fast systems:
    Code (Text):
    1. 00070584 - 2e ff 15 8c 05 95 00    - call cs:[0095058c]
    2.  
    3. 000705A0 - 2e ff 15 8c 05 95 00    - call cs:[0095058c]
    4. ----------------------------------------------------------
    5. 00070584 - b8 31 00 00 00            - mov eax,00000031
    6. 00070589 - 90                        - nop
    7. 0007058A - 90                        - nop
    8.  
    9. 000705A0 - b8 01 00 00 00            - mov eax,00000001
    10. 000705A5 - 90                        - nop
    11. 000705A6 - 90                        - nop
    Original on top, fix on bottom. Thanks to soundspark on YouTube.

    Save File Format (INCOMPLETE):
    Code (Text):
    1. 04 - Resort Island
    2. 08 - Radical City
    3. 0C - Reactive Factory
    4. 10 - Regal Ruin
    5. 14 - Radiant Emerald
    6. 18 - Sonic
    7. 1C - Tails
    8. 20 - Knuckles
    9. 24 - Amy Rose
    10. 28 - Dr. Robotnik
    11. 2C - Metal Sonic
    12. 30 - Tails Doll
    13. 34 - Metal Knuckles
    14. 38 - Eggrobo
    15. 3C - Super Sonic
    16. 40 - Blue Emerald
    17. 44 - Green Emerald
    18. 48 - Purple Emerald
    19. 4C - Yellow Emerald
    20. 50 - Orange Emerald
    21. 54 - Red Emerald
    22. 58 - White Emerald
    23. Stage:
    24. 0=Locked
    25. 1=Unlocked
    26. 2=First Place
    27. Character:
    28. 0=Hidden
    29. 1=Locked
    30. 2=Unlocked
    31. Emerald:
    32. 0=Not Collected
    33. 1=???
    34. 2=Collected
    Thanks to saxman's save editor.

    I replaced ai\aistuffr.bin with ai\aistuffi.bin, and the CPUs in Regal Ruin were running around like idiots.

    I replaced city\city_b.bin with emerald\emrald_b.bin, and this happened:
    [​IMG]
    It's using Radical City's textures, floor and solidity, but Radiant Emerald's model and object layout (including the start/finish line).

    The biggest problem with this game is that I would need a second computer to do any RAM hacking, and you need to run it through IDA. :(
    Unless there's a way to force it into a window?
     
  2. Jeztac

    Jeztac

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    Sonic R-DX
  3. Spanner

    Spanner

    I used to do things... Member
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    I wish I knew...
    You might be able to circumvent the fullscreen issue by attaching a second monitor to your computer and setting it to act as a seperate screen. I'm unsure if that'll help you though.
     
  4. MainMemory

    MainMemory

    Kate the Wolf Tech Member
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    No you can't. Cheat Engine's DirectX-mess doesn't work either, and I think it's because it doesn't start D3D until you select it in the menu.
     
  5. Jeztac

    Jeztac

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    Sonic R-DX
    What exactly didn't work when you tried it? I've used it with no issues, though in DirectDraw mode.
     
  6. MainMemory

    MainMemory

    Kate the Wolf Tech Member
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    It still runs in fullscreen mode, in either setting. Also, I think it crashes Internet Explorer?

    Edit: Also, every other time, Sonic R refuses to start, leaving me with a black screen. I have to Ctrl+Alt+Del and kill IDA.
     
  7. Heh, not a bad idea! Hacking Sonic R should be pretty interesting if it can be pulled off. Here's a question though, are you guys trying to do this through the PC version or an emulated Saturn rom of the game?
     
  8. MainMemory

    MainMemory

    Kate the Wolf Tech Member
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    PC.

    Edit: SCHG:Sonic R PC
     
  9. Ice God

    Ice God

    Earthbound Fanboy Banned
    I was talking to Jimmy while he did all of this over skype before you. Credit him where it's due.
     
  10. MainMemory

    MainMemory

    Kate the Wolf Tech Member
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    What? I said that he told me it worked with IDA.
     
  11. Polygon Jim

    Polygon Jim

    Eternal Tech Member
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    across town from Hinchy
    All the bitches.

    Yeah, but I already was working on the savegame, and already messing around with models.
     
  12. MainMemory

    MainMemory

    Kate the Wolf Tech Member
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    How am I supposed to know that? I did this myself.
     
  13. Tweaker

    Tweaker

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    Unless he was stealing info from you—and from the looks of things, he didn't—there's nothing wrong with him posting his own findings. If you want to be first, then post before him—simple as that.
     
  14. Skeledroid

    Skeledroid

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    I've always thought Sonic R should be hacked to make a full fledge 3D Sonic game. This would be a lot cooler if you hacked the Saturn version for the sake of having a 3D Sonic game on it.
     
  15. MainMemory

    MainMemory

    Kate the Wolf Tech Member
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    And if you don't want me to hack something, don't talk to me about it. You got me interested.
     
  16. Polygon Jim

    Polygon Jim

    Eternal Tech Member
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    across town from Hinchy
    All the bitches.

    Yeah I know, I'm just slightly pissed off I stayed up all night doing all of this, and then he goes and does it too. It's nice to have more than 1 person hacking something, but it's a bit counterproductive when they don't communicate. I have him added on yahoo messenger, and he can message me, so I think he should have at least asked if I was working on any of this already.
     
  17. MainMemory

    MainMemory

    Kate the Wolf Tech Member
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    Yeah, probably.

    I'm looking into sonicr.inf now.

    Edit: I'm probably not going to do much with the files that don't change.
     
  18. Aquaslash

    Aquaslash

    <The Has-been Legend> Moderator
    Ok people, less of the dick waving, more more of the hacking please.
     
  19. Polygon Jim

    Polygon Jim

    Eternal Tech Member
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    across town from Hinchy
    All the bitches.

    Ok.
    [​IMG]
    [​IMG]


    Figuring out the vertex's for the model format.
     
  20. Afti

    Afti

    ORIGINAL MACHINE Member
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    Are level models stored in a similar format, or a completely different one?