I'm not clear exactly what the SuperPLA does. It seems to be a replacement PLA clone for C64s with broken PLA chips (by my best guess).
Yes, you are correct; it is a replacement PLA clone. It's supposed to be more compatible than any other PLA clone made from EPROMs. FWIW, others make PLA clones (like Eslapion in Montreal, Quebec).
Truly,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcugJuly 28-29 Commodore Vegas Expo v8 -
http://www.portcommodore.com/commvex