A disassembly of the Simon Wai prototype of Sonic the Hedgehog 2 for the Sega Genesis/Mega Drive, based on the 2007 disassembly by Esrael L.G. Neto; it results in a bit-perfect ROM with the original. This is a continuation of Alex Field's disassembly, aiming for more research and usability.

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Credits:

• Esrael L.G. Neto - original disassembly
• Clownacy - Z80 disassembly, taken from SMPS Research Pack v5
• SuperEgg - ASM files for music
• OrionNavattan - fixed errors resulting from the switch to AS
• AlexField - improved disassembly
• MDT - ASM files for sfx D0 - E0
• Filter - additional work in getting a more bit-perfect build