This is purely curiosity, so don't go flaming like "blah blah why would you want to downgrade ST when you can just buy a Super board".
I've been wondering something...
I know that for emulated ST to work you need two roms, SSF2.zip and SSF2T.zip. It seems that SSF2T is more or less a patch for SSF2 - kind of like how you could upgrade SF4 by DLC
I also know that when I changed the battery in my ST board, it had 2 PCBs in it (one stacked on top of the other) which my other boards do not have. So I got thinking, I wonder if the bottom board contains the SSF2 code, and the top board contains the SSF2T code (which I'm sure they do if memory serves me right, briefly looking at the code on the ROM chips), so the board itself was kind of patched with this update PCB.
So you know where I'm going to go next - if you disconnect/remove the top PCB, would your ST board revert back to being a Super board?
Has anyone tested it, or is anyone brave enough to test it? My board is not phoenixed, so I don't want to go disconnecting PCBs in case the decryption key gets lost, but if you have a phoenixed board and are brave, fancy trying this out?