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Sonic 2 SMS Disassembly

Discussion in 'Engineering & Reverse Engineering' started by Glitch, Dec 15, 2008.

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  1. Dec 15, 2008 #1
    Glitch

    Glitch

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    Let the 8-bit hackery commence!

    Sonic 2 SMS Disassembly


    Stuff you should be aware of:
    - No IDA here! The bulk of the first 2 ROM banks were disassembled using smsexamine. The rest was disassembled either by using dZ80 or by hand.
    - Main source file is "src\s2.asm".
    - The source is rough around the edges. Expect messy tabbing in places. It's in desperate need of a cleanup but I wanted to get something out in the hopes of inspiring development on Sonic 2 LD :).
    - There are some brief notes about object logic and memory addresses in the "notes.txt" file. The rest of my notes are littered throughout the source.
    - The build batch file also generates a symbol file and a report on free space within each bank ("build_report.txt").


    I'm open to suggestions on ways to improve the directory and/or source structure. Also, alternative hosting would be greatly appreciated (we all know rapidshit sucks).
     
  2. Dec 15, 2008 #2
    Tweaker

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    I wish there was a "Super Tech Member" label, because I would totally throw you in it.

    This is absolutely fantastic! The one downside I see to this is that not many people in this community are very versed with Z80, myself included; if that weren't an issue, I could see this being much more popular. Regardless, this is excellent work—well done! :)

    As for hosting, feel free to host it on the wiki in Category:Disassemblies. We have absolutely no problem providing webspace for stuff like this.
     
  3. Dec 15, 2008 #3
    ICEknight

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    Nice. I'm sure the people at SMS Power would be also interested in such a thing. :)
     
  4. Dec 15, 2008 #4
    Sintendo

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    This could certainly come in handy for the Sonic 2 LD project. Nice job!
     
  5. Dec 15, 2008 #5
    Sik

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    being an asshole =P
    You're admin, you can create it, even if as custom title =P

    But then we may have techies whining that they should have it too, or members whining that it's stupid and that the requriements for techieness should be tighter, or stuff like that... Drama, in short :)
     
  6. Dec 15, 2008 #6
    Cinossu

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    Sonic the Hedgehog Extended Edition
    <!--quoteo(post=256826:date=Dec 15 2008, 05:40 PM:name=Tweaker)--><div class='quotetop'>QUOTE (Tweaker @ Dec 15 2008, 05:40 PM) [​IMG]
    ..? :x *runs*
     
  7. Dec 15, 2008 #7
    FraGag

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    Although I'm not personally interested in SMS hacking, may I suggest that this disassembly be uploaded on the SVN server? This will make it easy to keep it organized and prevent any loss of work. If you're lucky, you might even get some help! (Not from me though, I'm busy with Sonic 2 MD, when I'm not busy with school.) Also, I think you could quite easily merge the changes made to the disassembly on the SVN with Sonic 2 LD, so that you can use the progress made to it with little effort. Of course, it could still be uploaded on the wiki.

    Speaking of the wiki, maybe this page could be updated: SCHG:Sonic the Hedgehog 2 (Master System)
     
  8. Dec 15, 2008 #8
    nineko

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    Awesome work, I may attempt to do something with this sometimes.

    <!--quoteo(post=256828:date=Dec 15 2008, 08:48 PM:name=ICEknight)--><div class='quotetop'>QUOTE (ICEknight @ Dec 15 2008, 08:48 PM) [​IMG]
    ..? :x *runs*[/quote]I lol'd.
     
  9. Dec 15, 2008 #9
    Sik

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    Sik is pronounced as "seek", not as "sick". Tech Member
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    being an asshole =P
    Had to do it =P
     
  10. Dec 15, 2008 #10
    Overlord

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    I parsed it as that with my brain and did a double take before realising what it was. =P

    Absolutely fantastic work! How long did this take to do? I only ask as there aren't many other Master System titles and at least one should be smaller in size than this. Hopefully we'll see some nice hacks out of this - good work, Glitch!

    <!--quoteo(post=256868:date=Dec 15 2008, 10:12 PM:name=Cinossu)--><div class='quotetop'>QUOTE (Cinossu @ Dec 15 2008, 10:12 PM) [​IMG]
    ..? :x *runs*
    [/quote]
    LOL
     
  11. Dec 15, 2008 #11
    doc eggfan

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    This is the singularity at which point I lose all control of Sonic 2 LD and someone more qualified takes over. Fantastic. XD

    Goddamn I need to learn this shit. I feel so inadequate.
     
  12. Dec 15, 2008 #12
    Polygon Jim

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    All the bitches.
  13. Dec 16, 2008 #13
    Glitch

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    I've been working on it for about 4 months so far. I left the full WLA DX package in there so that will bump up the size of the zip. You only really need wla-z80 and wlalink.
     
  14. Dec 16, 2008 #14
    jman2050

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    ooh, nicely done. Another source file to get my hands dirty with >:D
     
  15. Dec 16, 2008 #15
    Oerg866

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  16. Feb 15, 2009 #16
    Glitch

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    Does anyone have any objections to this? The project is currently in a private repo but I'd like to move it to Sonic Retro if possible.
     
  17. Feb 15, 2009 #17
    Overlord

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    As far as I'm aware, that's what the SVN server is there for...
     
  18. Feb 15, 2009 #18
    JDAdams

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    Can I ask which version of Sonic 2 this is? 1.0 or 2.2? The difference being a height restriction in SHZ2 and a spring in GMZ1.
     
  19. Feb 16, 2009 #19
    Glitch

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    It's 1.0. It shouldn't be too hard to include the 2.2 bugfixes though.
     
  20. Feb 16, 2009 #20
    Tweaker

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    I actually wasn't aware that Sonic 2's 8-bit incarnations had multiple revisions. Are those the only changes, or are there more as well?
     
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