How Data East switch numbers map to rows and columns

Switches are numbered 1 to 64 in column order. Column 1 holds switches 1 to 8 (rows 1 to 8 in turn), column 2 holds 9 to 16, and column 8 holds 57 to 64. This differs from Williams WPC, where the two digits are the column and row.

Systems

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

Related tips

• Switch column trace map from CN8 to the 74LS244
• Switch row trace map from CN10 to the 4011 chips
• Switch row or column error: CPU board or playfield?
• Switch column (drive) circuit on the CPU board
• Switch row (return) circuit on the CPU board
• Test the switch column drivers with a diode jumper
• Test the switch row inputs with a diode jumper
• Most switch matrix faults show up as row faults

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