WPC CPU board versions and where they fit

A-12742 (bare board 5764-12431-00) is the non-security WPC-89 CPU, Funhouse to Popeye. A-17651 is the WPC-S CPU, World Cup Soccer to Who Dunnit. WPC-95 uses A-20119, A-21377 (5764-14823-0), 04-12358 (A-21377 without game chips) or A-21369 (different RAM), all interchangeable from Congo to Cactus Canyon. CPU boards never cross generations; each needs that game's ROM, and WPC-S and WPC-95 boards also need its PIC.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Related tips

• What is on the WPC CPU board
• Which System 11 CPU boards fit which games
• What fails on a WPC CPU board
• Running a WPC CPU board on the bench
• Bench-check the WPC CPU switch matrix circuit
• WPC-S and WPC-95 CPU boards need the matching security PIC
• Country DIP switch settings on WPC-S and WPC-95 CPU boards
• Country jumpers W13 to W18 on pre-WPC-S CPU boards

Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part One, Clay Harrell (pinrepair.com)