Make a bussed network from single resistors

If the right bussed network cannot be found, one can be built from separate resistors: tie one end of each resistor to the common pin hole (the one with the white square) and the other ends to pins 2 to 9.

Systems

• Data East CPU Version 1/2
• Data East CPU Version 3
• Data East/Sega CPU Version 3b

Related tips

• Bussed and isolated resistor networks
• Resistor networks in the switch matrix
• A single switch does not register

Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part Three, Clay Harrell (pinrepair.com)