ROM-Reader for Super Nintendo / Super Famicom Game Cartridges

How exactly would one choose the proper NES mapper btw? This screen is very confusing.

Image: https://imgur.com/a/gk9JVgg

EDIT: Also, the flashrom programmer says "MX26L6420 adapter" instead of "16bit Flash programmer" in the menu as it used to be and still is. :stuck_out_tongue: