I found this document on how to alter NES carts to allow EEproms but I am confused.
http://nesdev.parodius.com/NES%20EPROM%20Conversions.txt
It keeps referring to pins 30 and 31. There are only 28 pins on the CHR and PRG chips.... Did they mean 26 and 27? (falsely thinking that there were 32 pins)