Flipper ROMs at IC17 and IC20: replace the originals with new EPROMs
On every System 3 to 7 CPU board, IC17 and IC20 hold the flipper ROMs (the operating system). They take 2716 EPROMs or 2316 masked ROMs with no jumper changes. The old ROMs lose data with age and their tarnished legs snap, so fit freshly burned EPROMs and new sockets.
Systems
Related tips
- System 7: the 2532 goes in IC17, the 2716 in IC20
- Leon's test EPROM: what to burn and where it goes
- Convert a System 3 CPU board to a single 2716 game EPROM at IC14
- System 4, 6 and 7 boards: one 2716 at IC14 replaces the three game PROMs
- Seven-digit scoring on six-digit displays for green-ROM games
- Run Firepower on a System 7 CPU board
- Leon sound board test EPROM
- "Flipper ROMs" have nothing to do with the flippers
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part Two, Clay Harrell (pinrepair.com)