Yup, that's one of the EPROM-based cart copiers that years later led many people to think they had rare prototypes of Super Mario Bros., Adventure Island, or Bomber Man. It only works on NROM (mapperless) games.
Some later ones (like 1987) also work with CNROM too (hence "protected" CNROM boards), but largely it's a big waste of time compared to the I2 copier (Tonkachi Editor people), HK copiers and now PowerPak.
