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Act numbers under Sonic 2

Discussion in 'Engineering & Reverse Engineering' started by Sonic Hachelle-Bee, May 31, 2004.

  1. Sonic Hachelle-Bee

    Sonic Hachelle-Bee

    Taking a Sand Shower Tech Member
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    Lyon, France
    Sonic 2 Long Version
    This may be discussed before (I found nothing with searching) but I was debugging my hack, Sonic 2 long version, when I tried to fix the Death Egg zone 3 act number. Remember, the 3 was going from the right instead of the left because I added a yellow character at the end of the string "DEATH EGG". Now, I have found how to change act numbers at the start and the end of a level! So, my 3 under DEZ is going from the left like in Metropolis 3!

    Level startup numbers (splash screen):

    $13DF2-13E08
    Here are listed all levels that displays nothing instead of the act number.
    They are listed like this:
    0C 00 00 XX 67 SS
    XX is your level.
    Jump SS bytes if the level XX is loaded to display nothing (go to $13E3E usually).
    Already listed: Sky Chase zone, Wing Fortress zone and Death Egg zone.

    $13E08-13E14
    You can find here another list of levels. These levels will display a 3 instead of a 1 or a 2 character.
    0C 00 00 XX 67 SS
    XX is your level.
    Jump SS bytes if the level XX is loaded to display a 3 instead of 1 or 2.
    Metropolis zone has not a 67 SS because the next bytes are that will load a 3. So, SS usually will go to $13E14 if you add others levels to the list.
    Already listed: Metropolis zone (level 05).

    End of levels (SONIC GOT THROUGH...):

    $14148-1415C
    List of levels that display ZONE string instead of ACT.
    Same system as before.
    Already listed: SCZ, WFZ and DEZ.

    $14168-14184
    List of levels that display nothing instead of the act number.
    Already listed: SCZ, WFZ and DEZ.

    $14184-1418A
    List of levels that display a 3 instead of 1 or 2.
    Already listed: Metropolis zone.

    EDIT: when a level will displays nothing or a 3 instead of 1 or 2, ZONE instead of ACT, both acts 1 and 2 will be affected.

    I hope this will be useful for some people. ;)
     
  2. Quickman

    Quickman

    be attitude for gains Tech Member
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    18
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    omg porjcet
    Nice work. Pin plz.
     
  3. Ultima

    Ultima

    Games Publisher Tech Member
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    London, England
    Publishing mobile games!
    Excellent.
     
  4. Hayate

    Hayate

    Tech Member
    Yes, definately a great finding. However, I need to *reverse* the act numbers in 0500/0501 (so that 0500 says act 2 and 0501 says act 1). Don't rush yourself though, I need to buy a new CD-RW drive before I can get my Sonic hacking stuff back on my Windows 98SE. ;)