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It seems that mediafire deleted my original rsdk unpacker links. The program has been requested so I'm reposting here:
rsdkunpack
Source
I might get around to cleaning up my packer source and releasing that later.

Since there's been some interest in this recently, I've spent some time getting the wiki version of Triple Trouble SMS running on actual hardware. Thanks go out to vingazole over at SMS Power for pointing out the hblank write timing issue.

I've attached the new version to the wiki page: here. I'd be grateful if people could give it a play through and let me know if they come across any show-stopper bugs.

Since there has been some interest in S2SMS hacking recently, I've been putting some thought into writing a few tutorials. I've already started work on a tutorial for adding a new badnik and I'll be fleshing this out over the next few days. I'd like to get an idea about what tutorials people would like to see. It doesn't have to be specific to the Sonic 2 engine, it could be related to the SMS in general. So, what should I work on next?

Ok, I'm not going to get a chance to work on this for a couple of weeks so I'm releasing a preview version here and a quickstart guide here. It requires Java SE 6 to run. Windows users should be able to double-click the jar file to run the app but if you have problems, drop to a command line and run "java -jar AspectEdit.jar".

Current Functionality:
- SMS Palette editing
- Direct editing of un/compressed tile art
- Mapping editing
- Level editing (with compression)

As usual CC is welcomed.

Additionally there's an updated copy of s2pack available here.

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).