If you're interested, up-to-date versions of Sonic the Hedgehog disassemblies can be found here: http://info.sonicretro.org/Disassemblies
People have also disassembled other games like Super Mario Bros., etc.
Anyways, it's a small world. I definitely recognized your nickname from the Sonic forum and I think you helped unearthed a prototype(s). I can't tell you how much I appreciated your work!