SMB3 World Order hack

This is an ASM hack that allows you to change the world order that Mario progresses through. When you apply this patch, you will notice nothing different. To actually change the world order, you must edit some ROM addresses.

Here's the readme:


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                <                          >
                <  SMB3 World Order Patch  >
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                 vvvvvvvvvvvvvvvvvvvvvvvvvv

                         By KP9000


Apply this patch to Super Mario Bros. 3 (U) (v0). This version is
untested with other localizations or versions of this ROM.

This patch allows you to change the order of worlds you progress in.
It is an ASM hack that uses a series of checks and performs code 
according to the world you complete. The original game only just
incremented the world by one.

All you need to do is change some ROM values. To change the starting 
world, change the following ROM address:

$30CC3 - Starting World

To change the order of the worlds, change the following ROM addresses
accordingly.

$3DFD1 - Next World to go to after World 1 (Currently set to World 2)
$3DFD7 - Next World to go to after World 2 (Currently set to World 3)
$3DFDD - Next World to go to after World 3 (Currently set to World 4)
$3DFE3 - Next World to go to after World 4 (Currently set to World 5)
$3DFE9 - Next World to go to after World 5 (Currently set to World 6)
$3DFEF - Next World to go to after World 6 (Currently set to World 7)
$3DFF5 - Next World to go to after World 7 (Currently set to World 8)
$3DFFB - Next World to go to after World 8 (Currently set to World 1)

World 9 is not included since it is handled a bit differently
than other worlds.

Be careful you don't accidentally throw yourself into a loop! 
That would suck.

If you are going to use this, please be sure to credit me somewhere.
My feelings won't be hurt if you don't though, but if you claim this
work as your own I will hunt you down and make you eat your fingernails.


                         Have  Fun!

And, finally, the download.

EDIT: Strange. Yeah, I thought it was ROM. I dunno how that happened. My apologies.

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The hex for each world is this: $00 for World 1, $01 for World 2, $02 for World 3, and so on.

If you just completed World 1, and you're going to World 2, it reads the address at $3DFD1 (which is $01, the byte for world 2) so it takes you to World 2. If you change that byte to, say, $05, then it takes you to World 6.

You can throw yourself into a World loop this way, with the only means of escape is to find a Warp Whistle, but I find that a truly evil feature for a hack and should not be used at all.

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Applying an IPS patch is far more common knowledge than how to apply source code into a ROM manually. That's why I decided to do it that way. Not only that, some emulators support on-the-fly IPS patching, too.

There needs to be more SMAS hacking. Seriously.

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I realized that editing the order of the worlds means that when you jump from world to world the numbers in the status bar aren't in order. Editing this to match the world order you have in place requires another ASM hack, which I am working on right now. I just need to clean up the code and then I will release it.

So, you'll have to edit two sets of ROM addresses:

One set for editing world order (which is already released) and another set for what world number to assign it.

If any of you have applied the patch already, you should be able to re-apply it on top of the old one with the new code without problems. You might have to edit the ROM adresses again, though.

I'll edit my first post when it is released.

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Actually, where it says "World #" in the status bar, it works a little bit different than that. The tile to use for the world number is determined by checking a certain RAM address. Therefore, there is no table of values to load per world. I have changed that code and added a table of values to change.

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