You can compile the ROM's back with rgbds: https://github.com/gbdev/rgbds
Here you can see how bank switching works.
Also, recent versions of file(1) from Unix can parse GB ROM headers too.
You can compile the ROM's back with rgbds: https://github.com/gbdev/rgbds
Here you can see how bank switching works.
Also, recent versions of file(1) from Unix can parse GB ROM headers too.