Sonic 2 Disassembly - 2005 Edition

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This version requires AS. You can download the latest build here. AS 2.42 Build 40 can be downloaded from this mirror, but use the original site if possible.

EDIT: Forgot to add that this is somewhat incomplete and is by no means a comprehensive reverse engineering. It is far better than the original work. (zing)

 

I have already said this a million times. I DO NOT HAVE IDA PRO. I am NOT about to spend $450 dollars on a license for a peice of software I'll probably only use for this, and I'm not going to warez it, because despite it's price tag, it's still a damn good peice of software.

[EDIT: I took the dive and downloaded IDA Pro for use in my sound driver disassembly. However, I have no plans on using it with the Sonic 2 disassembly if and when I get back to working on that.]

I made all my changes in gvim. Find and replace, etc. Besides, I don't think you can do EQUs from IDA, so it's a moot point anyway.

[EDIT: You can, but it's a pain in the ass. IDA doesn't let you change every particular immediate operand at once; instead, you need to disassemble the entire 68k addressing space so that you can use labels. This is the technique I used on the sound driver.]

 

Many of the variables have been given descriptive names rather than the simple addresses they had before. This makes it far easier to read a section of code. I've also named a few more labels, and commented out the checksum test procedure.

Because it's very heavily documented and works with long filenames. It's also incredibly fast and flexible, and I should be able to get it to assemble the Z80 code right into the 68k code.

 

Added. Thank you. ^_^

 

Added. Thank you.