Converting a D102 CPU board to take a 2716 game ROM
Steps
- Component side: cut the trace coming in from the left between Z10 pins 6 and 7.
- Solder side: jumper Z10 pin 13 to the pad just below and right of Z9 pin 7.
- Solder side: cut the two traces running into pins 19 and 21 of the PROM1 socket.
- Solder side: add three jumpers from the PROM1 socket to the PROM2 socket: PROM1-21 to PROM2-24, PROM1-22 to PROM2-18, and PROM1-19 to PROM2-21.
- Make sure U2/U3 suit the game's system generation.
Systems
Related tips
- U2/U3 rules ROMs decide which system a CPU board runs
- System 80 CPU board revisions D102, D107 and D20869
- Which System 80 CPU board goes with which games
- Replace the decoupling capacitors on the CPU and driver boards
- System 80 CPU board main chips
- System 80 and 80A CPU boards swap only with the matching U2/U3
- Reading the System 80 CPU DIP switches
- How a 2332 rules ROM differs from a 2532 EPROM
Source: Repairing & Upgrading Gottlieb System 80 Pinballs from 1980 to 1989, Part Two, Clay Harrell (pinrepair.com)