There are two titles that I know of that will work only on the Genesis Model 1. Ishido and Budokon - The Martial Spirit. As far as I know Ishido fails to send the proper checks for the later model genesis to run it. So this is most likely not a game that enables the SMS mode. However, Budokon appears to work differently than Ishido and I am curious if this is a game that switches the Genesis into SMS mode. I did a hex edit scan on the budokon SMD file and right after the SMD header there is what looks like an old dos style run command. Now of course this would be most unusual to have this be the few lines of code to do the mode switch and also unlikely to be able to see it in a hex edit prg. But is there a way to track down the bit code if the image could be disasembled or could it be seen in a hex edit prg like headers are and reproduced and pasted on othe SMS images? Thanks.