NVRAM Compatibility List and Installation Locations
** indicates the original RAM is soldered directly onto the PCB
NVRAM installation requires finding the original SRAM chip and swapping it out for the new NVRAM module. No instructions are included with the NVRAM modules. Systems where the original RAM is hard soldered to the PCB good rework tools and skills are required to desolder the original RAM and install the included IC socket.
5101 NVRAM
Bally / Stern AS-2518-17, AS-2518-35, MPU-100 = U8
Williams System 3 through 7 = IC19 **
Williams Defender (video) = U?? **
Gottlieb System 80, 80A, 80B = Z5 **
Zaccaria System 1 = IC7
Williams System 3 through 7 = IC19 **
Williams Defender (video) = U?? **
Gottlieb System 80, 80A, 80B = Z5 **
Zaccaria System 1 = IC7
6116 NVRAM
Bally / Midway 6803 = U4
Williams System 9 = U18 **
Williams System 11, 11A, 11B, 11C = U25 **
Williams System 9 = U18 **
Williams System 11, 11A, 11B, 11C = U25 **
6116 NVRAM with /CE pullup resistor
Atari Pole Position (Pole Position II may not be supported?) = 7E
Bally / Midway MCR video games ; Demolition Derby = G5, Discs of Tron = B6, Domino Man = B2, Journey = G2, Kick = D8, Kick-Man = D8, Kozmik Krooz'r = B2, NFL = G5, Satan's Hollow = B2, Sarge = G5, Spy Hunter = G5, Solar Fox = D8, Tapper = G5, Timber = G5, Tron = B2, Two Tigers = B2, Wacko = B2.
(MCR locations need verified, if you notice any wrong let me know)
Bally / Midway MCR video games ; Demolition Derby = G5, Discs of Tron = B6, Domino Man = B2, Journey = G2, Kick = D8, Kick-Man = D8, Kozmik Krooz'r = B2, NFL = G5, Satan's Hollow = B2, Sarge = G5, Spy Hunter = G5, Solar Fox = D8, Tapper = G5, Timber = G5, Tron = B2, Two Tigers = B2, Wacko = B2.
(MCR locations need verified, if you notice any wrong let me know)
6264 NVRAM
Data East (Pinball) = 5D
Sega Whitestar = U212
Stern Whitestar = U212
Williams WPC-89, WPC-S, WPC-95 = U8 **
Sega Whitestar = U212
Stern Whitestar = U212
Williams WPC-89, WPC-S, WPC-95 = U8 **
5114 NVRAM
Stern (video) Frenzy and Berzerk = 1E **
Williams Video Games; Blaster, Bubbles (need two), Joust, Joust 2, Robotron, Sinistar, Splat, Stargate = ?? **
Williams Video Games; Blaster, Bubbles (need two), Joust, Joust 2, Robotron, Sinistar, Splat, Stargate = ?? **
This is not a comprehensive list and the NVRAM modules will likely work in other equipment such as synthesizers, vintage computers, and other video games. If you see any mistakes in the Bally MCR game list please let me know. Check the Cypress datasheet about design considerations for retrofitting into other battery backed SRAM applications not listed.