Bally -35 MPU jumper settings by ROM type
Factory settings: 9316s at U1, U2 and U6 use E1-E4, E2-E6, E7-E8, E9-E11, E12-E36, E13-E15, E16a-E19, E31-E32, E33-E34. 2716s at U2 and U1 (U6 empty) use E1-E5, E2-E4, E7-E8, E10-E12, E16a-E18, E31-E32, E33-E35. 74S474s at U2 and U6 with a 2716 at U1 use E1-E3, E2-E6, E9-E11, E12-E36, E13-E15, E16a-E18, E31-E32, E33-E35. 2532/9332 in both U2 and U6: cut E13-E15 and fit E4-E12, E7-E8, E10-E11, E13a-E14, E16a-E34, E29-E33, E31-E32; with a 2732 at U6 instead, cut E13-E15 and fit E4-E12, E7-E8, E10-E11, E13a-E14, E16a-E29, E31-E32, E33-E35 (page 5). Remove any jumper not listed for your ROM set.
Systems
Related tips
- ROM and EPROM types used on Bally MPUs
- Why the MPU has ROM jumpers
- How to read Bally jumper charts and identify ROM types
- Get the MPU booting before you change any ROM jumpers
- ROM types that share a jumper setting are not interchangeable between games
- Get the MPU working before changing jumpers
- Add a ground jumper on every -17/-35 MPU
- Jumpers for a -35/-133 MPU running two 2732 EPROMs (U2 and U6)
Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part Three, Clay Harrell (pinrepair.com)