I spent a few hours with my professor teaching ourselves how it worked using a GAL chip to create some basic logic gates. Fortunately, even as outdated as this programmer is, there was still software available for it online for Windows XP (at the verrrry bottom of the download list). It took some effort before we were able to get the programmer into a working state.
However, the concept of mappers are coming up again. It might be time to write about them, either in an edit to this post or the next one.
Back to programming.