Is there any way to convert ZSNES savegames to SNES9x ones?
There are two different kinds of savegames for both of these emulators. First, there are the savegames which are created by using the in-game save feature. These savegames (*.srm) can be moved between both emulators with no problems at all. However, not all games (like Contra 3) do have a saving feature. Second, there are the savegames created by using the emulator specific ‘snapshot’ feature (e.g. by pressing the F2 key). These files use an emulator specific format, so you can’t use them on the other program.