What is NVRAM (non-volatile random-access memory)? | Definition from TechTarget
MPU UNIT FOR STUDER A810 (NO BATTERY VERSION WITH NVRAM CHIP)
Replacing a dead NVRAM chip · Pizza Box Computer
Williams 5114/5514/6514 NVRAM Adapter
Tried to upgrade battery to NVRAM chip on my Sega Space Jam and when I put chip in game booted up to the display screen and then picture after that on DMD.