Quoted from Xerico:Will the NVRAM work with System 11? I need to replace the battery holder as even new batteries are not preventing the adjustment failure message that I get every time it boots.
Yep, nvram works great on those games but you'd need to remove the existing RAM (typically soldered on the board from the factory). Should be the 6116 nvram unless someone has already replaced the nvram with a socket and installed a 6264. Worth checking what's currently on the board just in-case.