Jumpers for a -35/-133 MPU running two 2732 EPROMs (U2 and U6)

Steps

• Remove every jumper left from the old ROM setup that is not on this list.
• Around U2: jump E4 to E13a, E12 to the wide ground trace just left of E12, E7 to E8, and E10 to E11.
• Around U6: jump E31 to E32, E16a to E29 (labelled E16 to E29 on a -133 board), and E33 to E35.
• Fit the 2732 EPROMs burned with the game's converted code at U2 and U6.

Systems

• Bally MPU AS-2518-35

Related tips

• Why the MPU has ROM jumpers
• Telling a -133 MPU from a -35 or -17
• Converting a -133 MPU to a -35
• Setting up an MPU for the test EPROM
• U9 signals with the test EPROM running
• -17, -35 and -133 MPU boards compared
• Get the MPU working before changing jumpers
• Convert a -133 MPU to a -35

Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part Three, Clay Harrell (pinrepair.com)