This is my mod to add a Star Fox 2 ROM to a Stunt Race FX cart. The idea came to me thinking about various things like what a waste it was to kill the Stunt Race FX cart and how I could get Star Fox 2 ROM working in a cart with least effort. This led to the idea to use a switch and enable one ROM at a time. Disliking making holes in things which would be needed for a switch, I thought for another way and then came to me. Hey I can use the Reset to switch roms :)
How it works:
The Stunt Race FX ROMs chip select line has been disconnected and wired to a 74HCT74 chip and the EPROM with the Star Fox 2 ROMs chip select is also wired to this chip. The chip is wired in such a way that its outputs toggles each time the Super Nintendos reset button is pressed.