When I tried playing Sonic 3D DX in BlastEm, I put in my password to continue where I left off (which is after the final boss), but when the game loaded the map screen everything was dark. Then, a pop-up cam up and said "Fatal Error machine freeze due to write to address DFFFFE" and then the emulator just closes.
The password is 7XXZ:K98B9/
There may also be other passwords that cause the same problem on BlastEm like
7CRBMK98B9/
It works fine in other emulators, just not BlastEm.
Guess this bug can't be fixed