Big House and later use the MA-1133 System 80B CPU board
From Big House on, the 80B CPU board is the MA-1133 and the slam switch is normally open. Compared with earlier 80B boards it has an added solder-side wire at TC1, one trace cut on the top side, and a bigger EPROM fitted in socket 2.
Systems
Games
Related tips
- Which System 80 test EPROM image to use
- Swapping CPU boards between System 80, 80A and 80B
- Which System 80 CPU board goes with which games
- Making a System 80B CPU board run an earlier game (or the reverse)
- System 80 CPU board main chips
- System 80 CPU board revisions D102, D107 and D20869
- System 80 CPU board passive parts and diodes, board-wide
- 6532 RIOT port pins on the System 80 CPU board
Source: Repairing & Upgrading Gottlieb System 80 Pinballs from 1980 to 1989, Part One, Clay Harrell (pinrepair.com)