One thing I often noticed about chipped games, was the games with expansion chips had the extra pins. DSP1 is an obvious exception. Besides the DSP family, were there any other enhancement chips that did NOT utilise the extra pins?
I have a handful of FX and SA-1 carts that use the extra pins, and the Super Game Boy. Also regretably as awesome a piece of tech that is the Game Genie, I wish they'd of has the foresight to include the expansion pins to use cheats on games like Starfox, Yoshi's Island, or SMRPG.
One other thing, I read somewhere the clock speed on the DSP1 chip is not application critical. Would there be any benefit to overclocking the DSP on the Everdrive?